Slow descending mechanism, clamping wheel lifting mechanism and propelling device

Abstract

The utility model provides a slow descending mechanism, a clamping wheel lifting mechanism and a propelling device, and relates to the technical field of lifting mechanisms. The slow descending mechanism provided by the utility model comprises at least one damping wheel set and at least one driving device, wherein the damping wheel set comprises at least two damping wheels capable of providing rotary damping; the damping wheel is configured to abut against the lifting rod and move close to the lifting rod along with descending of the lifting rod or has the trend of moving close to the lifting rod.

Description

TECHNICAL FIELD

[0001] The present specification relates to the field of lifting mechanisms, and in particular to a slow descent mechanism, a clamping wheel lifting mechanism and a propulsion device. BACKGROUND

[0002] A lifting mechanism is a mechanical device used to transport materials or change the position of equipment in a vertical or inclined direction. The lifting mechanism can be driven by mechanical transmission (such as gears, chains, steel wires, etc.) or a hydraulic system to achieve the lifting function. The lifting mechanism can be used in a propulsion device, such as a marine propulsion device. The marine propulsion device can include a propeller, a power device driving the propeller, and a lifting rod connected to the power device. In some related use scenarios, the lifting rod can abnormally descend due to equipment damage or loss of lifting power, etc. SUMMARY

[0003] One or more embodiments of the present specification provide a slow descent mechanism for slowing down the descent speed of a lifting rod, comprising: at least one damping wheel set, the damping wheel set comprising at least two damping wheels capable of providing rotational damping; the damping wheels are configured to resist the lifting rod and move or have a tendency to move close to the lifting rod as the lifting rod descends.

[0004] In some embodiments, further comprising: a guide member configured to guide the damping wheels to move towards the axial direction of the lifting rod as the damping wheels descend with the descent of the lifting rod.

[0005] In some embodiments, the damping wheels descend based on the downward friction provided to the damping wheels when the lifting rod descends.

[0006] In some embodiments, the guide member is a track groove, and the damping wheels are capable of moving along the track groove; the distance between the lower end of the track groove and a lifting plane is less than the distance between the upper end of the track groove and the lifting plane, and the distance between the track groove and the lifting plane is monotonously arranged along the track extension direction of the track groove; wherein the axis of the lifting rod is located in the lifting plane, and the axis of the damping wheel is parallel to the lifting plane.

[0007] In some embodiments, further comprising: a force applying member for applying a downward movement pre-pressure to the damping wheels.

[0008] In some embodiments, the force applying member comprises a downward pressing plate against the damping wheel and an elastic member, the downward pressing plate is capable of rising or descending, one end of the elastic member is fixedly arranged, and the other end of the elastic member is against the downward pressing plate.

[0009] In some embodiments, further comprising: a slow descent housing, the damping wheel set is arranged inside the slow descent housing, the damping wheel is slidably connected with the slow descent housing; a track groove, the slow descent housing is formed with the track groove, the damping wheel can move along the track groove, the distance between the lower end of the track groove and a lifting plane is less than the distance between the upper end of the track groove and the lifting plane, the distance between the track groove and the lifting plane is monotonously arranged along the track direction of the track groove, wherein the axis of the lifting rod is located in the lifting plane, and the axis of the damping wheel is parallel to the lifting plane; a lower pressing plate, the lower pressing plate abuts against the damping wheel, the lower pressing plate can be raised or lowered, and the lower pressing plate is used for applying a downward movement pre-pressing force to the damping wheel; and an elastic member, one end of the elastic member abuts against the slow descent housing, and the other end of the elastic member abuts against the lower pressing plate.

[0010] In some embodiments, the lower pressing plate has two lower pressing portions, and the two lower pressing portions respectively abut against the upper surfaces of the damping wheel shafts of the two damping wheels; the projection of the lower pressing portion on the radial plane of the lifting rod has a width greater than the projection of the track groove on the radial plane of the lifting rod.

[0011] In some embodiments, one of the lower pressing plate and the slow descent housing is provided with a lower pressing plate guide groove opened in the lifting direction, and the other of the lower pressing plate and the slow descent housing is provided with a lower pressing plate guide member, and the lower pressing plate guide member is slidably connected with the lower pressing plate guide groove.

[0012] In some embodiments, the damping wheel comprises: a damping wheel shaft mechanism, the damping wheel shaft mechanism is slidably connected with the slow descent housing; a damping wheel body, the damping wheel body can rotate relative to the damping wheel shaft mechanism; and a damping mechanism, the damping mechanism is arranged between the damping wheel shaft mechanism and the damping wheel body, and is used for providing rotational damping of the damping wheel body relative to the damping wheel shaft mechanism.

[0013] In some embodiments, the damping wheel shaft mechanism is configured to be rotatably arranged relative to the slow descent housing; or the damping wheel shaft mechanism is configured to be non-rotatably arranged relative to the slow descent housing.

[0014] In some embodiments, a damping cavity is formed between the damping wheel body and the damping wheel shaft mechanism, the damping mechanism is arranged inside the damping cavity, and the damping mechanism comprises: a first damping sheet fixed relative to the damping wheel body in a radial direction, a second damping sheet fixed relative to the damping wheel shaft mechanism in the radial direction, and damping grease at least partially filled inside the damping cavity.

[0015] In some embodiments, the outer periphery of the first damping sheet comprises one or more first damping sheet protrusions that abut against the inner wall of the damping wheel body; the outer surface of the damping wheel shaft mechanism is non-circular in cross-section, and the inner edge of the second damping sheet matches the outer edge of the damping wheel shaft mechanism.

[0016] In some embodiments, the number of the first damping sheets and the second damping sheets is multiple, and the first damping sheets and the second damping sheets are arranged alternately.

[0017] In some embodiments, the damping wheel shaft mechanism comprises a first damping wheel shaft and a damping middle shell sleeved on the first damping wheel shaft, the damping middle shell is configured to rotate unidirectionally relative to the damping wheel shaft, and the rotatable direction of the damping middle shell matches the upward direction of the lifting rod; the damping cavity is formed between the damping wheel body and the damping middle shell.

[0018] In some embodiments, the damping wheel shaft mechanism comprises a second damping wheel shaft; the damping cavity is formed between the damping wheel body and the second damping wheel shaft.

[0019] In some embodiments, at least one end of the damping wheel shaft is provided with an opening, and the damping wheel shaft is provided with a damping wheel shaft channel that communicates the opening and the damping cavity.

[0020] One or more embodiments of the present specification provide a clamping wheel lifting mechanism, comprising: a lifting rod, a clamping wheel set for driving the lifting rod to ascend or descend, and a slow descent mechanism for slowing down the descending speed of the lifting rod; the clamping wheel set comprises two clamping wheels abutting against the lifting rod, and the clamping wheels rotate to drive the lifting rod to ascend or descend by friction; the slow descent mechanism is any one of the slow descent mechanisms described above.

[0021] In some embodiments, it comprises a clamping wheel support, the clamping wheel is rotatably connected with the clamping wheel support, the clamping wheel can rotate around a first axis, and the clamping wheel support can rotate around a second axis parallel to the first axis.

[0022] In some embodiments, it comprises a driving mechanism for providing rotary driving force and a transmission mechanism for transmitting the driving mechanism and the clamping wheel; the transmission mechanism comprises: a worm, a worm wheel meshing with the worm, a first transmission gear rotating coaxially with the worm wheel, and a second transmission gear meshing with the first transmission gear; the second transmission gear is fixedly connected with the clamping wheel shaft of the clamping wheel, and the second transmission gear rotates around the first axis; the worm wheel and the first transmission gear both rotate around the second axis.

[0023] In some embodiments, the clamp wheel covers a portion of the outer surface of the lifting rod, and the clamp wheel has a concave surface matching the shape of the outer surface of the lifting rod.

[0024] One or more embodiments of the present specification provide a propulsion device, comprising: a lifting rod and the slow descent mechanism of any one of the above.

[0025] One or more embodiments of the present specification provide a propulsion device, comprising: a lifting rod and the clamp wheel slow descent mechanism of any one of the above. BRIEF DESCRIPTION OF DRAWINGS

[0026] The present specification will be further described in the manner of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. The same reference numbers in the drawings represent the same structures or steps.

[0027] Figure 1 is a schematic view of a slow descent mechanism according to some embodiments of the present specification.

[0028] Figure 2 is a front view of a slow descent mechanism according to some embodiments of the present specification.

[0029] Figure 3 is a side view of a slow descent mechanism according to some embodiments of the present specification.

[0030] Figure 4 is a schematic view of a slow descent mechanism according to some embodiments of the present specification.

[0031] Figure 5 is a schematic view of the internal structure of a slow descent mechanism according to some embodiments of the present specification.

[0032] Figure 6 is a partial enlarged view of Figure 5

[0033] Figure 7 is a schematic view of a slow descent mechanism cooperating with a lifting rod according to some embodiments of the present specification.

[0034] Figure 8 is a partial enlarged view of the slow descent mechanism of Figure 7

[0035] Figure 9 is a schematic view of a damping wheel according to some embodiments of the present specification.

[0036] Figure 10 is a schematic view of a first damping wheel shaft, a damping middle shell, a first damping sheet and a second damping sheet of a damping wheel according to some embodiments of the present specification.

[0037] ​​Figure 11 is a cross-sectional view of a damping wheel according to some embodiments of the present specification.

[0038] Figure 12 is Figure 11 a partial enlarged view of the damping wheel.

[0039] Figure 13 is a schematic view of a damping wheel according to some other embodiments of the present specification.

[0040] Figure 14 is a schematic view of a second damping wheel axle, a first damping sheet and a second damping sheet of a damping wheel according to some other embodiments of the present specification.

[0041] Figure 15 is a cross-sectional view of a damping wheel according to some other embodiments of the present specification.

[0042] Figure 16 and Figure 17 is Figure 15 a partial enlarged view of the damping wheel.

[0043] Figure 18 is a partial structural schematic view of a slow descent wheel body of a slow descent mechanism according to some embodiments of the present specification.

[0044] Figure 19 is a schematic view of a first damping sheet of a slow descent mechanism according to some embodiments of the present specification.

[0045] Figure 20 is a schematic view of a second damping sheet of a slow descent mechanism according to some embodiments of the present specification.

[0046] Figure 21 is a schematic view of a clamp wheel lifting mechanism according to some embodiments of the present specification.

[0047] Figure 22 is Figure 21 a partial enlarged view of A of the clamp wheel lifting mechanism.

[0048] Figure 23 is Figure 21 a partial enlarged view of B of the clamp wheel lifting mechanism.

[0049] Figure 24 is a three-dimensional schematic view of a clamp wheel, a clamp wheel support and a transmission mechanism of a clamp wheel lifting mechanism according to some embodiments of the present specification.

[0050] Figure 25 is a top view schematic view of a clamp wheel, a clamp wheel support and a transmission mechanism of a clamp wheel lifting mechanism according to some embodiments of the present specification.

[0051] Figure 26is a schematic view of a clamping wheel, a clamping wheel support and a transmission mechanism of a clamping wheel lifting mechanism according to some embodiments of the present specification.

[0052] Figure 27 is a schematic view of a clamping wheel, a clamping wheel support and a transmission mechanism of a clamping wheel lifting mechanism according to some embodiments of the present specification.

[0053] Figure 28 is Figure 27 a partial enlarged view.

[0054] Figure Mark: 100 Lifting rod; 1 Damping wheel set; 11 Damping wheel; 110 Damping wheel shaft mechanism; 111 First damping wheel shaft; 1111 Damping wheel shaft channel; 112 Damping wheel body; 1121 Damping piece limiting groove; 1122 Rubber limiting part; 1123 Rubber limiting groove; 113 Damping mechanism; 1131 First damping piece; 1132 First damping piece protrusion; 1133 Second damping piece; 114 Damping middle shell; 1140 Sealing ring; 1141 First damping middle shell; 1142 Second damping middle shell; 1143 One-way bearing; 1144 Step part; 116 Second damping wheel shaft; 1161 One-way bearing; 1162 Bearing; 1163 Boss; 1164 Elastic stop ring; 1165 Stop ring; 117 Rubber coating; 2 Trajectory groove; 3 Force applying member; 31 Down plate; 311 Down part; 312 Columnar structure; 32 Elastic piece; 4 Slow down shell; 41 Slow down shell boss; 51 Down plate guide groove; 52 Down plate guide; 6 Clamping wheel set; 61 Clamping wheel; 7 Clamping wheel support; 81 Worm; 82 Worm wheel; 83 First transmission gear; 84 Second transmission gear; 200 Controller; 300 Propeller. DETAILED DESCRIPTION

[0055] In order to more clearly illustrate the technical solutions of the embodiments of the present specification, the embodiments will be described in detail below with reference to the drawings. Obviously, the following description is some examples or embodiments of the present specification, and for those skilled in the art, without creative labor, the technical solutions or means disclosed in the present specification can also be applied to other scenarios.

[0056] It should be understood that the "system", "device", "equipment", "part" and / or "unit" and / or "module" used in the present specification is a method for distinguishing different components, elements, parts, parts or assemblies at different levels. However, if other words can achieve the same purpose, the words can be replaced by other expressions.

[0057] Unless otherwise noted, technical terms, terminology and descriptions of components, elements, etc. in the present specification are not intended to refer only to singulars, but can also include plurals unless otherwise indicated by context. Generally, the terms "comprising," "including," and the like, when used in the present specification, specify the presence of stated steps, elements or components but do not preclude the presence or addition of one or more other steps, elements, components, etc. to the methods or structures described.

[0058] In the description of the present specification, it needs to be understood that the orientation description, such as the orientation or position relationship indicated by the upper, lower, front, rear, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present specification, unless otherwise expressly limited, the words arrangement, installation, connection, etc. should be broadly understood, and those skilled in the art can reasonably determine the specific meaning of the above words in the present specification in combination with the specific content of the technical solution.

[0059] A lifting mechanism is a mechanical device used to transport materials or change the position of equipment in a vertical or inclined direction. The lifting mechanism can be driven by mechanical transmission (such as gears, chains, steel wires, etc.) or hydraulic system to achieve the lifting function (such as driving the lifting rod to lift). In some embodiments, the lifting mechanism can be used for a propulsion device, such as a marine propulsion device. In some embodiments, the marine propulsion device can include a propeller, a power device driving the propeller, and a lifting rod connected to the power device. The lifting rod allows the propeller to descend and enter the water surface, or adjust the depth under the water surface; the lifting rod also allows the propeller to rise and leave the water surface. In some embodiments, the lifting rod can also be configured to be able to turn around a certain horizontal axis to change from a vertical state to a horizontal state, thereby allowing the entire propulsion device to be horizontally or substantially horizontally housed inside the hull. In some embodiments, the lifting rod can also be configured to be able to rotate around its axial direction, thereby adjusting the orientation of the propeller.

[0060] In some related use scenarios, the lifting rod can abnormally descend due to equipment damage or loss of lifting power, etc. Based on this, one or more embodiments of the present specification provide a slow descent mechanism that can slow down the descent speed of the lifting rod in the case of abnormal descent of the lifting rod.

[0061] Figure 1 is a schematic view of a slow descent mechanism according to some embodiments of the present specification, Figure 2 is a front view of a slow descent mechanism according to some embodiments of the present specification, Figure 3 is a side view of a slow descent mechanism according to some embodiments of the present specification. See Figures 1 to 3As shown, in one or more embodiments of the present disclosure, the slow- down mechanism comprises at least one damping wheel set 1, the damping wheel set 1 comprising at least two damping wheels 11 capable of providing rotational damping, the damping wheels 11 being configured to abut against the lifting rod 100 and move towards or have a tendency to move towards the lifting rod 100 as the lifting rod 100 descends.

[0062] In some embodiments, the slow-down mechanism can comprise one damping wheel set 1. In other embodiments, the slow-down mechanism can comprise two or more damping wheel sets 1. In some embodiments, the two or more damping wheel sets 1 can be arranged in sequence along the axial direction of the lifting rod 100. In some embodiments, the damping wheels 11 in the two or more damping wheel sets 1 can be arranged opposite to each other in the vertical direction (i.e. the direction of lifting and lowering of the lifting rod 100). In other embodiments, the damping wheels 11 in the two or more damping wheel sets 1 can be arranged staggered with respect to each other in the vertical direction (i.e. the direction of lifting and lowering of the lifting rod 100).

[0063] In some embodiments, one damping wheel set 1 can comprise two damping wheels 11. In some embodiments, the two damping wheels 11 can be arranged in parallel on both sides of the lifting rod 100. In some embodiments, the two damping wheels 11 can be located at the same horizontal level. In other embodiments, the two damping wheels 11 can be located at different horizontal levels.

[0064] In some embodiments, one damping wheel set 1 can comprise more than two damping wheels 11, for example three damping wheels 11. In some embodiments, the plurality of damping wheels 11 in one damping wheel set 1 can all abut against the lifting rod 100. In some embodiments, the plurality of damping wheels 11 in one damping wheel set 1 can be arranged in a circumferential array around the outer periphery of the lifting rod 100.

[0065] In some embodiments, the damping wheels 11 abut against the lifting rod 100 and provide rotational damping to the lifting rod 100 as the lifting rod 100 descends, so as to slow down the descending speed of the lifting rod 100 or prevent the lifting rod 100 from descending.

[0066] In some embodiments, there can be rolling friction between the damping wheels 11 and the lifting rod 100. In some embodiments, there can also be sliding friction between the damping wheels 11 and the lifting rod 100.

[0067] In some embodiments, the damping wheel 11 abuts against the lifting rod 100 and moves close to the lifting rod when the lifting rod 100 descends, so that the surface of the damping wheel 11 abuts more closely against the lifting rod 100, forming a greater positive pressure, thereby providing a greater rolling friction force, reducing the relative sliding between the lifting rod 100 and the damping wheel 11, so that the rotational damping provided by the damping wheel 11 can play a greater damping role. In some embodiments, in the case of rapid descent of the lifting rod in the event of an abnormality, the rapid descent of the lifting rod causes the damping wheel to move close to the lifting rod, so that the damping wheel provides a greater friction force to the lifting rod, thereby being able to slow down the descent speed of the lifting rod.

[0068] In some embodiments, when the downward resultant force acting on the lifting rod is balanced with the friction force provided by the damping wheel to the lifting rod, the lifting rod will maintain a uniform descent, at which time the damping wheel has a tendency to move close to the lifting rod 100 due to the friction force acting on it from the lifting rod, but due to the blocking of the lifting rod and the balance of other forces acting on the damping wheel, the damping wheel 11 maintains a state of being closely attached to the lifting rod 100, maintaining the current greater positive pressure, thereby providing a greater rolling friction force and / or sliding friction force to the lifting rod. In some embodiments, when the lifting is in a stationary state, the friction force of the lifting rod on the damping wheel weakens, at which time the damping wheel can move appropriately away from the lifting rod due to the elastic effect of the surface material of the damping wheel abutting against the lifting rod. In some embodiments, when the lifting rod changes from descending to stationary, the damping wheel can also maintain a state of being closely attached to the lifting rod 100, and then move away from the lifting rod as the upward friction force of the lifting rod on the damping wheel when the lifting rod ascends.

[0069] In one or more embodiments of the present specification, the slow descent mechanism further comprises a guide member configured to guide the damping wheel 11 to move towards the axis direction of the lifting rod 100 to increase the positive pressure between the damping wheel 11 and the lifting rod 100 when the damping wheel 11 descends with the descent of the lifting rod 100. In some embodiments, the guide member is configured to guide two damping wheels 11 to move towards the axis direction of the lifting rod 100 respectively to increase the positive pressure between each damping wheel 11 and the lifting rod 100 when the two damping wheels 11 descend with the descent of the lifting rod 100. In some embodiments, guiding the damping wheel 11 to move towards the axis direction of the lifting rod 100 can be understood as guiding the damping wheel 11 to move close to the lifting rod 100.

[0070] In some embodiments, the damping wheel 11 abuts against the lifting rod 100 and descends based on the downward friction force provided to the damping wheel 11 when the lifting rod 100 descends.

[0071] In some embodiments, the guiding member is a track groove 2 along which the damping wheel 11 is movable. In some embodiments, the track groove can be provided by a groove arranged on a certain plate-like structure. In some embodiments, the track groove can also be provided by a certain guide rail. In some embodiments, the damping wheel shaft of the damping wheel 11 can be arranged in the groove or the guide rail, so that the damping wheel 11 as a whole is movable along the track groove 2.

[0072] Referring to Figure 3 illustrated, Figure 3 the dashed line in Figure 3 illustrated, the axis of the lifting rod 100 is located in the lifting plane X, and the axis of the damping wheel 11 is parallel to the lifting plane X. In some embodiments, the two damping wheels 11 can be arranged in parallel, and the axes of the two damping wheels 11 are both parallel to the lifting plane X.

[0073] In some embodiments, the distance between the lower end of the track groove 2 and the lifting plane X is less than the distance between the upper end of the track groove 2 and the lifting plane X. Based on the above arrangement of the track groove 2, in some embodiments, no matter the specific positional relationship between the track groove 2 and the axis of the lifting rod 100, no matter whether the track groove 2 has an extension in the direction perpendicular to the paper plane, the damping wheel 11 can move close to or have a tendency to move close to the axis of the lifting rod 100 during the descending process along the track groove 2.

[0074] In some embodiments, the distance between the track groove 2 and the lifting plane X is monotonously arranged along the track extension direction of the track groove 2, so that the distance of the damping wheel 11 relative to the axis of the lifting rod 100 during the descending process has monotonicity, thereby causing the friction force of the damping wheel 11 on the lifting rod 100 to monotonously change.

[0075] In some embodiments, the track groove 2 can extend in a straight line direction, or in a curved direction, or in a broken line direction. In some embodiments, the monotonously arranged track groove 2 can enable the damping wheel 11 to keep close to the lifting rod 100 during the descending process, rather than being away from the lifting rod 100 at a certain position.

[0076] In some embodiments, the track groove 2 extends in a straight line direction, and the track groove 2 has an included angle with the radial plane of the lifting rod 1. In some embodiments, the angle of the included angle can be 70° to 88°, for example, 75° to 85°. For example, the angle of the included angle can be 72°, 76°, 78°, 79.5°, 80°, 80.72°, 83°, 85°, 86.3°, 87°.

[0077] In one or more embodiments of the present specification, the soft-landing mechanism further comprises a force applying member 3 configured to apply a pre-pressing force to the damping wheel 11 in a downward direction, so that the damping wheel 11 has a tendency to descend in advance, and thus the damping wheel 11 can be in contact with the lifting rod 100 based on the action of the track groove 2 in a normal working state of the lifting mechanism, so as to be able to respond in the process of abnormal descent of the lifting rod 100. In some embodiments, the force applying member 3 can simultaneously apply a pre-pressing force to both damping wheels 11 in a downward direction. In some embodiments, the force applying member 3 applies a pre-pressing force to the damping wheel 11 in a downward direction, so that the damping wheel has a tendency to move close to the lifting rod or move close to the lifting rod in advance.

[0078] In some embodiments, the force applying member 3 comprises a downward pressing plate 31 abutting against the damping wheel 11 and an elastic member 32. In some embodiments, the downward pressing plate 31 can be raised or lowered, and provides a pre-pressing force to the damping wheel 11 in a downward direction in the process of lowering of the downward pressing plate 31. In some embodiments, one end of the elastic member 32 is fixedly arranged, and the other end of the elastic member 32 abuts against the downward pressing plate 31, and a pre-pressing force in a downward direction is provided by the elastic member 32.

[0079] In one or more embodiments of the present specification, the soft-landing mechanism can comprise a soft-landing housing 4, a track groove 2, a downward pressing plate 31 and an elastic member 32. In some embodiments, the damping wheel set 1 is arranged inside the soft-landing housing 4, and the damping wheel 11 (such as the damping wheel shaft mechanism 110) of the damping wheel set 1 is slidably connected with the soft-landing housing 4. In some embodiments, the damping wheel 11 can slide relative to the soft-landing housing 4. In some embodiments, the damping wheel 11 can also rotate relative to the soft-landing housing 4. In some embodiments, the soft-landing housing 4 is formed with the track groove 2, and the damping wheel 11 can move along the track groove 2. In some embodiments, the track groove 2 can be a through groove or a blind groove formed on the soft-landing housing 4, or can be provided by a guide rail arranged on the soft-landing housing 4. In some embodiments, the distance between the lower end of the track groove 2 and a lifting plane X is less than the distance between the upper end of the track groove 2 and the lifting plane X, and the distance between the track groove 2 and the lifting plane X is monotonously arranged along the track extending direction of the track groove 2, wherein the axis of the lifting rod 100 is located in the lifting plane X, and the axis of the damping wheel 11 is parallel to the lifting plane X. In some embodiments, the downward pressing plate 31 abuts against the damping wheel 11, and the downward pressing plate 31 can be raised or lowered, and the downward pressing plate 31 is configured to apply a pre-pressing force to the damping wheel 11 in a downward direction. In some embodiments, one end of the elastic member 32 abuts against the soft-landing housing 4, and the other end of the elastic member 32 abuts against the downward pressing plate 31. In some embodiments, the elastic member 32 can be a spring.

[0080] In some embodiments, the soft-landing housing 4 has a soft-landing housing boss 41, and the upper end of the elastic member 32 abuts against the soft-landing housing boss 41.

[0081] In some embodiments, the lower pressing plate 31 has a columnar structure 312 with a blind groove inside for accommodating the elastic member 32. In some embodiments, the lower end of the elastic member 32 abuts against the bottom of the blind groove of the columnar structure 312. In some embodiments, the sidewall of the blind groove of the columnar structure 312 provides movement guidance for the elastic member 32.

[0082] In some embodiments, referring to FIG. 3, the lower pressing plate 31 has two lower pressing portions 311, each of which abuts against the upper surface of the damping wheel shaft of the damping wheel 11. In some embodiments, the two lower pressing portions 311 are respectively located on the two sides of the lower pressing plate 31. In some embodiments, the lower pressing plate 31 is T-shaped. In some embodiments, the two sides of the lower pressing plate 31 form an avoiding area for avoiding the track groove 2, for example, the two side areas of the T-shaped lower pressing plate 31. Figures 3 to 5 In some embodiments, the track groove 2 is formed on the side plate of the slow descent housing 4. In some embodiments, the side plate of the slow descent housing 4 and the lower pressing plate 31 can be arranged in parallel, and the lower pressing plate 31 can ascend or descend along the side plate. In some embodiments, the projection of the lower pressing portion 311 on the radial plane of the lifting rod 100 has a width greater than the projection of the track groove 2 on the radial plane of the lifting rod 100, so as to avoid the damping wheel 11 located in the track groove 2 from being separated from the range of the lower pressing portion 311 due to the displacement of the damping wheel shaft in the horizontal direction.

[0083] In some embodiments, the lower surface of the two lower pressing portions 311 can be flat, so that the same force applying condition is provided between each part thereof and the damping wheel shaft of the damping wheel 11. Figure 3 In some embodiments, one of the lower pressing plate 31 and the slow descent housing 4 is provided with a lower pressing plate guide groove 51 formed in the lifting direction, and the other of the lower pressing plate 31 and the slow descent housing 4 is provided with a lower pressing plate guide member 52, which is slidably connected with the lower pressing plate guide groove 51.

[0084] In some embodiments, referring to FIG. 3, the slow descent housing 4 is provided with the lower pressing plate guide member 52. In some embodiments, the lower pressing plate 31 is provided with the lower pressing plate guide groove 51. In some embodiments, the lower pressing plate guide groove 51 extends in the lifting direction to guide the movement of the lower pressing plate 31 in the lifting direction. In some embodiments, the lower pressing plate guide member 52 can be a columnar structure, and the lower pressing plate guide member 52 extends into the inside of the lower pressing plate guide groove 51.

[0085] Figure 4 In one or more embodiments of the present specification, referring to FIG. 3,

[0086] In one or more embodiments of the present specification, referring to FIG. 3, Figure 9 Figure 13 ​​As shown, the damping wheel 11 can include a damping wheel shaft mechanism 110, a damping wheel body 112, and a damping mechanism 113. In some embodiments, the damping wheel body 112 is rotatable relative to the damping wheel shaft mechanism 110, and the damping mechanism 113 is arranged between the damping wheel shaft mechanism 110 and the damping wheel body 112 to provide rotational damping of the damping wheel body 112 relative to the damping wheel shaft mechanism 110.

[0087] In some embodiments, the damping wheel body 112 of the damping wheel 11 is in contact with the lifting rod 100, and during the abnormal descent of the lifting rod 100, the damping wheel body 112 has a tendency to rotate due to the downward friction provided by the lifting rod 100. In some embodiments, because the rotational damping provided by the damping mechanism 113 is greater than the downward friction provided by the lifting rod 100 when the lifting rod 100 just starts to descend, no relative rotation occurs between the damping wheel body 112 and the damping wheel shaft mechanism 110, and the damping wheel 11 as a whole descends based on the downward friction.

[0088] In some embodiments, as the damping wheel 11 descends, the damping wheel 11 approaches the lifting rod 100 based on the constraint of the track groove 2, at which time the normal pressure between the damping wheel body 112 and the lifting rod 100 increases, and the downward friction provided by the lifting rod 100 increases until the friction is greater than the rotational damping provided by the damping mechanism 113. At this time, relative rotation begins to occur between the damping wheel body 112 and the damping wheel shaft mechanism 110, and the damping wheel 11 provides rotational damping to the lifting rod 100 to slow down the descent of the lifting rod 100.

[0089] In some embodiments, the damping wheel shaft mechanism 110 is configured to be rotatably arranged relative to the slow descent housing 4. In some embodiments, the damping wheel shaft mechanism 110 is configured to be unidirectionally rotatable relative to the slow descent housing 4, for example, by being connected to the slow descent housing 4 through a one-way bearing, so that the damping wheel 11 can provide rotational damping in one rotational direction, for example, when the lifting rod 100 descends, while being free to rotate when the lifting rod 100 ascends. In other embodiments, the damping wheel shaft mechanism 110 is configured to be non-rotatably arranged relative to the slow descent housing 4.

[0090] In one or more embodiments of the present specification, a damping cavity is formed between the damping wheel body 112 and the damping wheel shaft mechanism 110, and the damping mechanism 113 is arranged inside the damping cavity. The damping mechanism 113 includes a first damping piece 1131 that is fixed relative to the damping wheel body 112 in a radial direction, a second damping piece 1133 that is fixed relative to the damping wheel shaft mechanism 110 in the radial direction, and damping grease that is at least partially filled inside the damping cavity. In some embodiments, being fixed relative to each other in the radial direction means that the two are prevented from rotating relative to each other around an axial direction.

[0091] For example, the first damping piece 1131 is fixed relative to the damping wheel body 112 in the radial direction so that the first damping piece 1131 can rotate with the damping wheel body 112 and have the same angular velocity as the damping wheel body 112. Alternatively, the first damping piece 1131 is fixed relative to the damping wheel body 112 in the radial direction so that the first damping piece 1131 can be stationary with the damping wheel body 112.

[0092] For example, the second damping piece 1133 is fixed relative to the damping wheel axle mechanism 110 in the radial direction so that the second damping piece 1133 can rotate with the damping wheel axle mechanism 110 and have the same angular velocity as the damping wheel axle mechanism 110. Alternatively, the second damping piece 1133 is fixed relative to the damping wheel axle mechanism 110 in the radial direction so that the second damping piece 1133 can be stationary with the damping wheel axle mechanism 110.

[0093] In some embodiments, the first damping piece 1131 and the damping wheel body 112 can be connected by a key, or can be fixedly connected (e.g., bonded or welded) to be fixed relative to each other in the radial direction. In some embodiments, the second damping piece 1133 and the damping wheel axle mechanism 110 can be connected by a key, or can be fixedly connected (e.g., bonded or welded) to be fixed relative to each other in the radial direction.

[0094] In some embodiments, the first damping piece 1131 can be translated axially relative to the damping wheel body 112 to facilitate assembly of the first damping piece 1131 between the damping wheel axle mechanism 110 and the damping wheel body 112. In some embodiments, the second damping piece 1133 can be translated axially relative to the damping wheel axle mechanism 110 to facilitate assembly of the second damping piece 1133 between the damping wheel axle mechanism 110 and the damping wheel body 112.

[0095] In some embodiments, the first damping piece 1131 and the second damping piece 1133 can rotate relative to each other, and the first damping piece 1131 directly contacts the second damping piece 1133 to provide rotational damping based on friction.

[0096] In some embodiments, the first damping piece 1131 and the second damping piece 1133 can rotate relative to each other, and the first damping piece 1131 indirectly contacts the second damping piece 1133, for example, through other frictional members, or for example, through a fluid, to provide rotational damping based on friction or shear of the fluid or viscous drag of the fluid.

[0097] In some embodiments, the interior of the damping cavity is at least partially filled with damping grease, for example, the interior of the damping cavity is filled with damping grease between the first damping sheet 1131 and the second damping sheet 1133, or for example, the interior of the damping cavity is filled with damping grease.

[0098] In one or more embodiments of the present specification, referring to Figure 18 As shown, the outer periphery of the first damping sheet 1131 comprises one or more first damping sheet protrusions 1132. In some embodiments, the outer periphery of the first damping sheet 1131 comprises three first damping sheet protrusions 1132. In some embodiments, the three first damping sheet protrusions 1132 are arranged in a circumferential array.

[0099] In some embodiments, referring to Figure 9 to 12 As shown, the inner wall of the damping wheel body 112 is provided with a damping sheet limiting groove 1121, and the first damping sheet protrusion 1132 is arranged in the damping sheet limiting groove 1121 to realize relative fixation in the radial direction. In some embodiments, the damping wheel body 112 rotates and exerts force on the first damping sheet protrusion 1132 through the damping sheet limiting groove 1121, so that the first damping sheet 1131 rotates with the first damping sheet protrusion 1132.

[0100] In one or more embodiments of the present specification, the cross section of the outer surface of the damping wheel shaft mechanism 110 is non-circular, and the inner edge of the second damping sheet 1133 matches the outer edge of the damping wheel shaft mechanism 110 to realize relative fixation between the second damping sheet 1133 and the damping wheel shaft mechanism 110 in the radial direction. For example, the cross section of the outer surface of the damping wheel shaft mechanism 110 can be in the shape of a racetrack, a rectangle, a triangle, an ellipse, etc.

[0101] In some embodiments, the damping wheel shaft mechanism 110 can remain stationary (for example, neither translation nor rotation) in some cases (for example, in a force balance state or at the bottom of the trajectory groove 2, etc.), so that the second damping sheet 1133 remains stationary, and further generates damping between the first damping sheet 1131 and the second damping sheet 1133 when the damping wheel body 112 rotates.

[0102] In some embodiments, the damping wheel shaft mechanism 110 can translate but not rotate (for example, slide in the trajectory groove 2). In some embodiments, the damping wheel shaft mechanism 110 can rotate or simultaneously translate and rotate, but the angular velocity of its rotation is different from the angular velocity of the rotation of the damping wheel body 112.

[0103] In one or more embodiments of the present specification, referring to Figure 11As shown, the damping wheel shaft mechanism 110 includes a first damping wheel shaft 111 and a damping middle shell 114 sleeved on the first damping wheel shaft 111. In some embodiments, the damping middle shell 114 can rotate forward and / or reverse around the first damping wheel shaft 111.

[0104] In some embodiments, the damping middle shell 114 can rotate forward and reverse around the first damping wheel shaft 111.

[0105] In some embodiments, the damping middle shell 114 is configured to rotate in one direction, for example, the damping middle shell 114 can rotate forward around the first damping wheel shaft 111, or for example, the damping middle shell 114 can rotate reverse around the first damping wheel shaft 111. In some embodiments, the one-way rotation of the damping middle shell 114 enables the damping wheel 11 as a whole to provide rotational damping to resist rotation in one direction and not to provide rotational damping to allow smooth rotation in the other direction.

[0106] For example, the damping middle shell 114 is configured to rotate forward around the first damping wheel shaft 111 and cannot rotate reverse around the first damping wheel shaft 111; when the damping wheel 11 rotates forward, the damping wheel body 112 rotates forward, and since the damping middle shell 114 is allowed to rotate forward around the first damping wheel shaft 111 smoothly, the static friction between the first damping sheet 1131 and the second damping sheet 1133 is much greater than the rotational resistance of the damping middle shell 114, so that the damping wheel body 112 and the damping middle shell 114 rotate synchronously, realizing the smooth forward rotation of the damping wheel as a whole; when the damping wheel rotates reverse, the damping wheel body 112 rotates reverse, and since the damping middle shell 114 cannot rotate reverse around the first damping wheel shaft 111, the first damping sheet 1131 and the second damping sheet 1133 begin to rotate relative to each other, thereby starting to provide reverse rotational damping.

[0107] For example, the damping middle shell 114 is configured to rotate reverse around the first damping wheel shaft 111 and cannot rotate forward around the first damping wheel shaft 111; when the damping wheel 11 rotates reverse, the damping wheel body 112 rotates reverse, and since the damping middle shell 114 is allowed to rotate reverse around the first damping wheel shaft 111 smoothly, the static friction between the first damping sheet 1131 and the second damping sheet 1133 is much greater than the rotational resistance of the damping middle shell 114, so that the damping wheel body 112 and the damping middle shell 114 rotate synchronously, realizing the smooth reverse rotation of the damping wheel as a whole; when the damping wheel rotates forward, the damping wheel body 112 rotates forward, and since the damping middle shell 114 cannot rotate forward around the first damping wheel shaft 111, the first damping sheet 1131 and the second damping sheet 1133 begin to rotate relative to each other, thereby starting to provide forward rotational damping.

[0108] In some possible embodiments, the damping housing 114 may also be fixedly connected to the first damping wheel axle 111.

[0109] In some embodiments, the damping wheel 112 is rotatable relative to the damping housing 114, and rotational damping of the damping wheel 112 relative to the damping housing 114 is provided by a first damping plate 1131 and a second damping plate 1133 located between the damping wheel 112 and the damping housing 114. See also [other embodiments]. Figure 11 As shown, a sealing ring 1140 is provided between the damping wheel body 112 and the damping shell 114. In some embodiments, the sealing ring 1140 may be located at both ends of the damping shell 114 to confine the damping fluid, such as damping grease, within the damping cavity, for example, between the two sealing rings 1140. In some embodiments, a bearing is provided between the damping wheel body 112 and the damping shell 114.

[0110] In some embodiments, the damping housing 114 provides the outer surface of the damping wheel and axle mechanism 110. In some embodiments, the cross-section of the outer surface of the damping housing 114 is non-circular, and the inner edge of the second damping plate 1133 matches the outer edge of the damping housing 114, so that the second damping plate 1133 and the damping housing 114 are relatively fixed relative to each other in the radial direction. Exemplarily, the cross-section of the outer surface of the damping housing 114 can be racetrack-shaped, rectangular, triangular, elliptical, etc.

[0111] In one or more embodiments of this specification, see Figure 12 , Figure 11 As shown, a one-way bearing 1143 is provided between the first damping wheel shaft 111 and the damping inner shell 114 to realize unidirectional rotation between the damping inner shell 114 and the first damping wheel shaft 111. In some embodiments, a bearing housing space is formed between one or both ends of the damping inner shell 114 and the first damping wheel shaft 111, and the one-way bearing 1143 is disposed within the bearing housing space. In some embodiments, the one-way bearing 1143 can be a one-way needle roller bearing.

[0112] In one or more embodiments of this specification, the damping housing 114 includes a first damping housing 1141 and a second damping housing 1142, the first damping housing 1141 and the second damping housing 1142 being relative to a radial plane of the first damping wheel shaft 111 (e.g., Figure 11 The radial plane A) is arranged in a mirror-symmetric manner.

[0113] In some embodiments, both the first damping shell 1141 and the second damping shell 1142 have a stepped portion 1144. In some embodiments, the first damping plate 1131 and the second damping plate 1133 are arranged between the stepped portion 1144 of the first damping shell 1141 and the stepped portion 1144 of the second damping shell 1142, and the positions of the first damping plate 1131 and the second damping plate 1133 are limited by the two stepped portions 1144. In some embodiments, the number of first damping plates 1131 and the second damping plate 1133 can be multiple. In some embodiments, the first damping plates 1131 and the second damping plate 1133 can be arranged alternately. In some embodiments, multiple first damping plates 1131 and the second damping plate 1133 are pressed together by the two stepped portions 1144.

[0114] In some embodiments, the first damping inner shell 1141 includes: a first portion with a larger outer diameter (e.g., Figure 11 The left end of the first damping shell 1141 and the second part with a smaller outer diameter (e.g., the left end of the first damping shell 1141) ... Figure 11 The right end of the first damping shell 1141), and the step portion 1144 of the first damping shell 1141 is formed between the first part and the second part.

[0115] In some embodiments, the second damping inner shell 1142 includes: a third portion with a larger outer diameter (e.g., Figure 11 The right end of the second damping shell 1142) and the fourth part with a smaller outer diameter (e.g.) Figures 13 to 17 The step portion 1144 of the second damping middle shell 1142 is formed between the left end of the second damping middle shell 1142, the third portion, and the fourth portion.

[0116] In some embodiments, a damping fluid, such as damping grease, may be filled between the stepped portion 1144 of the first damping shell 1141 and the stepped portion 1144 of the second damping shell 1142. In some embodiments, the damping fluid, such as damping grease, may further be filled between a first portion of the first damping shell 1141 and the damping wheel 112 and / or between a third portion of the second damping shell 1142 and the damping wheel 112.

[0117] In some embodiments, the first portion of the first damping housing 1141 and the third portion of the second damping housing 1142 further provide the aforementioned bearing accommodating space.

[0118] In some embodiments, the first part of the first damping shell 1141 and the third part of the second damping shell 1142 are further provided with sealing ring grooves for accommodating the aforementioned sealing ring 1140.

[0119] In one or more embodiments of this specification, see Figure 15 As shown, the damping wheel and shaft mechanism 110 includes a second damping wheel and shaft 116.

[0120] In some embodiments, the damping wheel body 122 is rotatable relative to the second damping wheel shaft 116, and the rotation of the damping wheel body 112 relative to the second damping wheel shaft 116 is damped by the first damping sheet 1131 and the second damping sheet 1133 located between the damping wheel body 112 and the second damping wheel shaft 116.

[0121] In some embodiments, the second damping wheel shaft 116 provides an outer surface of the damping wheel shaft mechanism 110. In some embodiments, the cross section of the outer surface of the second damping wheel shaft 116 is non-circular, and the inner edge of the second damping sheet 1133 matches the outer edge of the second damping wheel shaft 116 so that the second damping sheet 1133 is relatively fixed with the second damping wheel shaft 116 in the radial direction. For example, the cross section of the outer surface of the second damping wheel shaft 116 can be in the shape of a racetrack, a rectangle, a triangle, an ellipse, etc.

[0122] In one or more embodiments of the present specification, one or both ends of the second damping wheel shaft 116 can be provided with a one-way bearing 1161 to achieve one-way rotation between the second damping wheel shaft 116 and the slow descent housing 4. In some embodiments, the one-way bearing 1161 can be a one-way needle bearing.

[0123] In some embodiments, a bearing 1162 is provided between the damping wheel body 112 and the second damping wheel shaft 116. In some embodiments, one bearing 1162 is provided on each side of the second damping wheel shaft 116 to confine the damping fluid, such as damping grease, within the damping cavity, for example, between the two bearings 1162.

[0124] In some embodiments, referring to Figure 14 As shown, one side of the second damping wheel shaft 116 is formed with a boss 1163, and the other side of the second damping wheel shaft 116 is provided with an elastic retaining ring 1164. In some embodiments, the other side of the second damping wheel shaft 116 is provided with a groove for assembling the elastic retaining ring 1164. In some embodiments, the two bearings 1162 and the first damping sheet 1131 and the second damping sheet 1133 are located between the boss 1163 and the elastic retaining ring 1164.

[0125] In some embodiments, two retaining rings 1165 are provided on the damping wheel shaft mechanism 110, for example, two retaining rings 1165 are provided on the second damping wheel shaft 116, and the first damping sheet 1131 and the second damping sheet 1133 are located between the two retaining rings 1165. In the foregoing example, the two bearings 1162, the two retaining rings 1165, and the first damping sheet 1131 and the second damping sheet 1133 are located between the boss 1163 and the elastic retaining ring 1164.

[0126] In one or more embodiments of this specification, there are multiple first damping plates 1131 and second damping plates 1133, and the first damping plates 1131 and second damping plates 1133 are alternately arranged. In some embodiments, one or more second damping plates 1133 are provided between two adjacent first damping plates 1131. In some embodiments, one or more first damping plates 1131 are provided between two adjacent second damping plates 1133. The plurality of first damping plates 1131 and second damping plates 1133 provides greater rotational damping.

[0127] In some embodiments, the quantity and alternation of the first damping plate 1131 and the second damping plate 1133 can be applied to the structure of the first damping wheel shaft 111 described above, and can also be applied to the structure of the second damping wheel shaft 116 described above.

[0128] In one or more embodiments of this specification, see Figure 15 , Figure 9 As shown, the damping wheel and shaft mechanism 110 may include a damping wheel and shaft (e.g., a second damping wheel and shaft 116). At least one end of the damping wheel and shaft has a first opening 101, and its side has a second opening 102 communicating with a damping cavity. The damping wheel and shaft has a damping wheel and shaft channel 1111 connecting the first opening 101 and the second opening 102. In some embodiments, the damping wheel and shaft channel 1111 is used to supply damping fluid, such as damping grease, to the interior of the damping cavity. In some embodiments, an oil nozzle 105 may be provided at the first opening 101 to close the damping wheel and shaft channel 1111.

[0129] In some embodiments, the structure of the damping wheel shaft channel 1111 of the damping wheel shaft can be applied to the first damping wheel shaft 111 described above, or it can be applied to the second damping wheel shaft 116 described above.

[0130] In some embodiments, a gap exists between the first damping plate 1131 and the damping wheel shaft (e.g., the first damping wheel shaft 111 or the second damping wheel shaft 116). In some embodiments, the second opening 102 faces one of the gaps between the first damping plate 1131 and the damping wheel shaft to provide damping fluid into the gap and to provide the damping fluid to other areas inside the damping cavity through the gap. In some embodiments, there are multiple second openings 102, each facing multiple gaps between the first damping plate 1131 and the damping wheel shaft to provide damping fluid into the gap and to provide the damping fluid to other areas inside the damping cavity through the gap.

[0131] In one or more embodiments of this specification, see Figure 13 , Figure 18As shown, the damping wheel body 112 is provided with a rubber coating 117. In some embodiments, the damping wheel body 112 is provided with two rubber coating limiting portions 1122, and the rubber coating 117 is located between the two rubber coating limiting portions 1122. In some embodiments, the rubber coating 117 at least partially covers the rubber coating limiting portions 1122. The rubber coating limiting portions 1122 are used to limit the position of the rubber coating 117 in the axial direction of the damping wheel body 112.

[0132] In some embodiments, referring to Figure 21 As shown, the damping wheel body 112 is further provided with one or more rubber coating limiting grooves 1123. In some embodiments, the rubber coating limiting grooves 1123 can extend in the axial direction of the damping wheel body 112. In some embodiments, the rubber coating limiting grooves 1123 can further extend to the rubber coating limiting portions 1122. In some embodiments, the rubber coating limiting grooves 1123 are used to increase the contact area with the rubber coating 117, so that the rubber coating 117 is more firmly fixed. In some embodiments, the rubber coating 117 can be made of polyurethane material. In some embodiments, the rubber coating 117 can provide a larger friction force. In some embodiments, the rubber coating 117 can be deformed to fit and cover the lifting rod 1, thereby increasing the contact area and the friction force.

[0133] Figure 22 is a schematic view of a clamping wheel lifting mechanism according to some embodiments of the present specification, Figure 21 is a partial enlarged view of A of Figure 23 Figure 21 is a partial enlarged view of B of Figures 21 to 23 Figure 22 As shown, in one or more embodiments of the present specification, the clamping wheel lifting mechanism comprises a lifting rod 100, a clamping wheel set 6 for driving the lifting rod 100 to ascend or descend, and the aforementioned slow descent mechanism for slowing down the descending speed of the lifting rod 100. In some embodiments, the clamping wheel set 6 comprises two clamping wheels 61 abutting against the lifting rod, and the clamping wheels 61 rotate to drive the lifting rod 100 to ascend or descend by friction. In some embodiments, the two clamping wheels 61 are respectively arranged on both sides of the lifting rod 100. In some embodiments, the clamping wheels 61 and the lifting rod 100 generate rolling friction, and the rolling friction drives the lifting rod 100 to ascend or descend. In some embodiments, the clamping wheels 61 have a friction surface that fits the lifting rod 100. In some embodiments, the cross section of the lifting rod 100 can be circular, and the friction surface of the clamping wheels 61 can be arc-shaped, so that the circular cross section of the lifting rod 100 allows the lifting rod 100 to rotate around its own axis without interfering with the clamping wheels 61. In some embodiments, the cross section of the lifting rod 100 can also be non-circular, such as rectangular, elliptical, etc. The non-circular cross section helps the lifting rod 100 to provide more contact surface with the clamping wheels 61, thereby increasing the friction force for ascending or descending, but inhibiting the rotation of the lifting rod 100 around its own axis.​​

[0134] In some embodiments, referring to Figures 24 to 26 , the clamping wheel lifting mechanism can include a plurality of clamping wheel sets 6 arranged in sequence along the axial direction of the lifting rod 100. In some embodiments, the clamping wheels 61 in the plurality of clamping wheel sets 6 can be arranged in mutual alignment in the axial direction of the lifting rod, or can be arranged in mutual stagger in the axial direction of the lifting rod.

[0135] In some embodiments, referring to Figure 27 , the clamping wheel lifting mechanism includes a clamping wheel support 7, the clamping wheel 61 is rotatably connected with the clamping wheel support 7, the clamping wheel 61 can rotate around a first axis B1 (for example, the axis of the clamping wheel 61 itself), and the clamping wheel support 7 can rotate around a second axis B2 parallel to the first axis B1. In some embodiments, the first axis B1 and the second axis B2 do not coincide, so that when the clamping wheel support 7 rotates, the clamping wheel 61 revolves around the second axis B2, so that the clamping wheel 61 approaches or moves away from the lifting rod 100, thereby adjusting the friction between the clamping wheel 61 and the lifting rod 100.

[0136] In some embodiments, the clamping wheel support 7 can include a clamping wheel support bottom plate 71 and two clamping wheel support side plates 72 arranged on the clamping wheel support bottom plate 71. In some embodiments, the clamping wheel 61 is rotatably arranged between the two clamping wheel support side plates 72, for example, rotatably connected with the two clamping wheel support side plates 72. In some embodiments, a bearing can also be arranged between the clamping wheel 61 and the clamping wheel support side plate 72.

[0137] In some embodiments, the clamping wheel lifting mechanism can include a clamping wheel lifting housing, and the clamping wheel support 7 can be rotatably connected with the clamping wheel lifting housing. In some embodiments, the clamping wheel support 7 can rotate relative to the clamping wheel lifting housing, for example, rotate around the second axis B2 relative to the clamping wheel lifting housing.

[0138] In one or more embodiments of the present specification, referring to Figure 21 , 28 , the clamping wheel lifting mechanism includes a driving mechanism for providing rotary driving force, and a transmission mechanism for transmission connecting the driving mechanism and the clamping wheel. In some embodiments, the transmission mechanism includes a worm 81, a worm wheel 82 meshing with the worm 81, a first transmission gear 83 rotating coaxially with the worm wheel 82, and a second transmission gear 84 meshing with the first transmission gear 83. In some embodiments, the second transmission gear 84 is fixedly connected with the clamping wheel shaft of the clamping wheel 61, and the second transmission gear 84 rotates around the first axis. In some embodiments, the worm wheel 82 and the first transmission gear 83 both rotate around the second axis.

[0139] In some embodiments, the transmission mechanism comprises a worm 81, two worm gears 82 meshing with two sides of the worm 81 respectively, and two first transmission gears 83 and two second transmission gears 84 corresponding to the two worm gears 82 respectively. In some embodiments, the two worm gears 82 are driven to rotate by the same worm 81, and the power is transmitted to the first transmission gears 83 and the second transmission gears 84 on both sides respectively and independently, so as to drive the two clamping wheels 61 to rotate synchronously at the same time.

[0140] In some embodiments, for example, some embodiments comprising two or more clamping wheel sets 6, the worm 81 can also mesh with more worm gears 82 in the axial direction thereof to drive all the clamping wheels 61 to rotate synchronously at the same time.

[0141] In one or more embodiments of the present specification, the clamping wheel 61 covers a part of the outer surface of the lifting rod 100, and the clamping wheel 61 has a concave surface matching the shape of the outer surface of the lifting rod 100.

[0142] In one or more embodiments of the present specification, a propulsion device is also provided, which comprises a lifting rod 100 and the above-mentioned slow descent mechanism. In some embodiments, referring to Figure 21 As shown, the propulsion device can further comprise a controller 200 for controlling the lifting rod 100 to ascend or descend, and a propeller 300 for providing propulsion force. In some embodiments, the propeller 300 can comprise a propeller.

[0143] In one or more embodiments of the present specification, a propulsion device is also provided, which comprises a lifting rod 100 and the above-mentioned slow descent mechanism. In some embodiments, referring to ​ As shown, the propulsion device can further comprise a controller 200 for controlling the lifting rod 100 to ascend or descend, and a propeller 300 for providing propulsion force. In some embodiments, the propeller 300 can comprise a propeller.

[0144] The beneficial effects that the embodiments of the present specification can bring include but are not limited to: (1) slowing down the descending speed of the lifting rod by the damping wheel set capable of providing rotational damping; (2) the damping wheel approaching the lifting rod as the lifting rod descends, increasing the normal pressure between the damping wheel and the lifting rod, reducing the sliding friction between the damping wheel and the lifting rod, and improving the efficiency of the rotational damping on the lifting rod; (3) the guide member guiding the damping wheel to move towards the axis direction of the lifting rod as the lifting rod descends, so as to approach the lifting rod; (4) the damping wheel descending based on the downward friction provided by the lifting rod when it is downward, which can quickly respond to the descent of the lifting rod without other detection mechanisms or electric control mechanisms; (5) the damping wheel being provided with downward pre-pressure by the force applying mechanism, so that there is a certain normal pressure between the damping wheel and the lifting rod in the initial state, so that the damping wheel is driven to descend when the lifting rod descends; (6) the damping wheel shaft of the damping wheel is prevented from being separated from the lower pressing plate by providing the lower pressing part covering the range of the track groove on the lower pressing plate; (7) the damping wheel body and the damping wheel shaft mechanism of the damping wheel can rotate relative to each other, and the damping is provided by the damping sheet, so that the damping wheel can provide rolling friction and rotational damping at the same time; (8) the first damping sheet and the second damping sheet are arranged to rotate relative to each other, so that a large rotational damping is provided by the large-area friction of the first damping sheet and the second damping sheet; (9) the damping grease is filled to further improve the rotational damping by the fluid shear force or viscous resistance of the damping grease; (10) the first damping sheet is rotated with the rotation of the damping wheel body by the cooperation of the first damping sheet protrusion and the damping sheet limiting groove; (11) the relative rotation between the damping wheel body and the damping wheel shaft mechanism is converted into the relative rotation between the first damping sheet and the second damping sheet by the cooperation of the non-circular surface of the damping wheel shaft mechanism and the second damping sheet, so as to provide damping; (12) the damping middle shell is arranged and the rotation direction of the damping middle shell relative to the first damping wheel shaft is limited to adapt to the direction requirement of providing damping; (13) a larger rotational damping is provided by the alternative arrangement of the plurality of first damping sheets and second damping sheets; (14) the damping wheel shaft channel is arranged to allow the addition of damping grease. It should be noted that different embodiments can have different beneficial effects, and in different embodiments, the beneficial effects that can be obtained can be any one or a combination of the above, or any other beneficial effects that can be obtained.

[0145] The above detailed description has been described, and it is obvious to those skilled in the art that the above detailed description is only an example and does not limit the present specification. Although it is not explicitly stated herein, those skilled in the art can make various modifications, improvements and corrections to the present specification. Such modifications, improvements and corrections are taught in the present specification, so such modifications, improvements and corrections still belong to the spirit and scope of the exemplary embodiments of the present specification.

Claims

1. A slow descent mechanism, characterized by, The application relates to a device for slowing down the descending speed of a lifting rod, which comprises at least one damping wheel set, wherein the damping wheel set comprises at least two damping wheels capable of providing rotational damping. The damping wheels are configured to abut against the lifting rod and move towards or have a tendency to move towards the lifting rod as the lifting rod descends.

2. The slow down mechanism according to claim 1, wherein, Further comprising: a guide member configured to guide the damping wheels to move towards the axial direction of the lifting rod as the damping wheels descend with the descending of the lifting rod.

3. The slow down mechanism according to claim 2, wherein, The damping wheels descend based on the downward frictional force provided to the damping wheels as the lifting rod descends.

4. The slow down mechanism according to claim 2, wherein, The guide member is a track groove, and the damping wheels can move along the track groove. The distance between the lower end of the track groove and a lifting plane is less than the distance between the upper end of the track groove and the lifting plane, and the distance between the track groove and the lifting plane is monotonously arranged along the track extension direction of the track groove. The axis of the lifting rod is located in the lifting plane, and the axis of the damping wheel is parallel to the lifting plane.

5. The slow down mechanism according to claim 1, wherein, Further comprising: a force applying member for applying a pre-pressing force to the downward movement of the damping wheels.

6. The overshot mechanism of claim 5, wherein, The force applying member comprises a downward pressing plate abutting against the damping wheels and an elastic member, the downward pressing plate can ascend or descend, one end of the elastic member is fixedly arranged, and the other end of the elastic member abuts against the downward pressing plate.

7. The slow down mechanism according to claim 1, wherein, Further comprising: a slow descending shell, the damping wheel set is arranged inside the slow descending shell, and the damping wheels are slidably connected with the slow descending shell; a track groove, the track groove is formed on the slow descending shell, the damping wheels can move along the track groove, the distance between the lower end of the track groove and a lifting plane is less than the distance between the upper end of the track groove and the lifting plane, and the distance between the track groove and the lifting plane is monotonously arranged along the track extension direction of the track groove, wherein the axis of the lifting rod is located in the lifting plane, and the axis of the damping wheel is parallel to the lifting plane; a downward pressing plate, the downward pressing plate abuts against the damping wheels, the downward pressing plate can ascend or descend, and the downward pressing plate is used for applying a pre-pressing force to the downward movement of the damping wheels; and an elastic member, one end of the elastic member abuts against the slow descending shell, and the other end of the elastic member abuts against the downward pressing plate.

8. The slow down mechanism according to claim 7, wherein, The downward pressing plate has two downward pressing portions, and the two downward pressing portions respectively abut against the upper surfaces of the damping wheel shafts of the two damping wheels. The projection width of the downward pressing portion on the radial plane of the lifting rod is greater than the projection width of the track groove on the radial plane of the lifting rod.

9. The slow down mechanism according to claim 7, wherein, One of the downward pressing plate and the slow descending shell is provided with a downward pressing plate guide groove opened in the lifting direction, and the other of the downward pressing plate and the slow descending shell is provided with a downward pressing plate guide member, and the downward pressing plate guide member is slidably connected with the downward pressing plate guide groove.

10. The slow down mechanism according to claim 7, wherein, The damping wheel comprises: a damping wheel shaft mechanism, the damping wheel shaft mechanism is slidably connected with the slow descending shell; a damping wheel body, the damping wheel body can rotate relative to the damping wheel shaft mechanism; A damping mechanism is arranged between the damping wheel shaft mechanism and the damping wheel body to provide rotational damping of the damping wheel body relative to the damping wheel shaft mechanism.

11. The slow down mechanism according to claim 10, wherein, The damping wheel shaft mechanism is configured to be rotatably arranged relative to the slow descent housing. Alternatively, the damping wheel shaft mechanism is configured to be non-rotatably arranged relative to the slow descent housing.

12. The slow down mechanism of claim 10, wherein, A damping cavity is formed between the damping wheel body and the damping wheel shaft mechanism, and the damping mechanism is arranged inside the damping cavity, the damping mechanism comprising: a first damping sheet fixed relative to the damping wheel body in a radial direction, a second damping sheet fixed relative to the damping wheel shaft mechanism in a radial direction, and damping grease at least partially filled inside the damping cavity.

13. The slow down mechanism according to claim 12, wherein, The outer periphery of the first damping sheet comprises one or more first damping sheet protrusions, which abut against the inner wall of the damping wheel body; The outer surface of the damping wheel shaft mechanism is non-circular in cross-section, and the inner edge of the second damping sheet matches the outer edge of the damping wheel shaft mechanism.

14. The slow down mechanism of claim 12, wherein, The number of the first damping sheets and the second damping sheets is both plural, and the first damping sheets and the second damping sheets are arranged alternately.

15. The descent control mechanism of any of claims 10 to 14, wherein, The damping wheel shaft mechanism comprises a first damping wheel shaft and a damping middle shell sleeved on the first damping wheel shaft, the damping middle shell is configured to be rotatable relative to the damping wheel shaft in one direction, and the rotatable direction of the damping middle shell matches the upward direction of the lifting rod. A damping cavity is formed between the damping wheel body and the damping middle shell.

16. The descent control mechanism of any of claims 10 to 14, wherein, The damping wheel shaft mechanism comprises a second damping wheel shaft. A damping cavity is formed between the damping wheel body and the second damping wheel shaft.

17. The slow down mechanism of claim 10, wherein, The damping wheel shaft mechanism comprises a damping wheel shaft, at least one end of the damping wheel shaft is provided with an opening, and the damping wheel shaft has a damping wheel shaft channel communicating the opening and the damping cavity in the damping wheel body.

18. A clamp wheel lifting mechanism characterized by, Comprising: a lifting rod, a clamp wheel set driving the lifting rod to ascend or descend, and a slow descent mechanism for slowing down the descending speed of the lifting rod; The clamp wheel set comprises two clamp wheels abutting against the lifting rod, and the clamp wheels rotate to drive the lifting rod to ascend or descend by friction force. The slow descent mechanism is the slow descent mechanism of any one of claims 1 to 17.

19. The wheel chair lift mechanism of claim 18, wherein, Comprising: a clamp wheel support, the clamp wheel is rotatably connected with the clamp wheel support, the clamp wheel can rotate around a first axis, and the clamp wheel support can rotate around a second axis parallel to the first axis.

20. The wheel chair lift mechanism of claim 19, wherein, Comprising a driving mechanism for providing rotational driving force and a transmission mechanism transmitting the driving mechanism and the clamp wheel; the transmission mechanism comprises: a worm, a worm wheel meshing with the worm, a first transmission gear rotating coaxially with the worm wheel, and a second transmission gear meshing with the first transmission gear; The second transmission gear is fixedly connected with the clamp wheel shaft of the clamp wheel, and the second transmission gear rotates around the first axis; The worm wheel and the first transmission gear both rotate around the second axis.

21. The wheel clamp lift mechanism of any one of claims 18 to 20, wherein, The clamp wheel covers a part of the outer surface of the lifting rod, and the clamp wheel has a concave surface matching the shape of the outer surface of the lifting rod.

22. A propulsion device characterized by, including the descent control mechanism of any one of claims 1 to 17, or, including the clamp wheel descent control mechanism of any one of claims 18 to 21.

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