Rotary lifting transmission mechanism and rotary lifting drive device

Abstract

The present invention relates to the technical field of power devices, and in particular to a rotary lifting transmission mechanism and a rotary lifting drive device. The rotary lifting transmission mechanism comprises: a main shaft assembly and a first disc spring; the main shaft assembly comprises a main shaft and a push rod shaft, the push rod shaft is fixedly connected to one end of the main shaft, and the first disc spring is sleeved and fixed outside the push rod shaft; the first disc spring is used for transmission connection with the rotary drive member so as to be able to rotate around the central axis of the main shaft, and the push rod shaft is used for transmission connection with the lifting drive member so as to be able to move along the axial direction of the main shaft. The rotary lifting mechanism provided by the present invention can realize that the power required by the lifting drive member is small, thereby making the power required by the rotary lifting drive device as a whole small. In addition, the rotary lifting transmission mechanism provided by the present invention makes the rotary lifting drive device compact in structure, highly integrated, and takes up little space.

Description

Technical Field

[0001] The present invention relates to the technical field of power devices, and in particular to a rotary lifting transmission mechanism and a rotary lifting drive device. Background Art

[0002] Various mechanical devices are developing towards greater integration, which places higher demands on the integration of drive transmission mechanisms. Currently, rotary and lifting drive devices that can drive both rotational motion and lifting motion usually include two sets of modules: one set of modules drives rotation and rotational transmission, and the other set of modules drives lifting and lifting transmission. The two sets of modules are stacked and used, with one set of modules serving as the bottom module to drive the overall movement of the other set of modules. This results in a large load on the bottom module, requiring a large amount of power, and thus a large amount of power required for the rotary and lifting drive device. Summary of the Invention

[0003] The object of the present invention is to provide a rotary lifting transmission mechanism and a rotary lifting drive device, so as to solve the technical problem of the high power required by the rotary lifting drive device in the prior art to a certain extent.

[0004] The present invention provides a rotary lifting transmission mechanism, comprising: a main shaft assembly and a first disc spring; the main shaft assembly comprises a main shaft and a push rod shaft, the push rod shaft is fixedly connected to one end of the main shaft, and the first disc spring is sleeved and fixed outside the push rod shaft; the first disc spring is used to be connected to a rotary driving member for transmission so as to be able to rotate around the central axis of the main shaft, and the push rod shaft is used to be connected to a lifting driving member for transmission so as to be able to move along the axial direction of the main shaft.

[0005] The rotary drive member drives the first disc spring to rotate, and the first disc spring drives the main shaft to rotate; the lifting drive member drives the push rod shaft to move in the axial direction of the main shaft, so that the push rod shaft drives the main shaft to move; because the first disc spring can deform in the axial direction of the main shaft, it can adapt to the lifting and lowering of the main shaft, and can drive the main shaft to rotate at the same time during the lifting and lowering process of the main shaft, thereby realizing the rotation transmission and lifting transmission of the main shaft; under the same external load, compared with the traditional rotary lifting drive device, the rotary lifting mechanism provided by the present invention can only drive the main shaft assembly to rotate and overcome the elastic force of the first disc spring, and the lifting drive member does not need to drive the rotary drive member and other components to move, thereby reducing the load of the lifting drive member, thereby making the power required by the lifting drive member small, and thus making the overall power required by the rotary lifting drive device small. In addition, the rotary lifting transmission mechanism provided by the present invention, the rotary transmission and the lifting transmission are both realized through the main shaft assembly, integrating the rotary transmission and the lifting transmission together, so that the structure of the rotary transmission mechanism is compact, the degree of integration is high, and the space occupied is small, thereby making the structure of the rotary lifting drive device compact, the degree of integration is high, and the space occupied is small.

[0006] Furthermore, the rotary lifting transmission mechanism also includes a rotating shaft and a second disc spring; one end of the rotating shaft is connected to the second disc spring, the second disc spring is sleeved and fixed outside the main shaft, the rotating shaft is sleeved outside the main shaft, and the other end of the rotating shaft is used for transmission connection with the rotating drive member.

[0007] Furthermore, the rotary lifting transmission mechanism also includes a limiting elastic member; a mounting groove is provided on one end wall of the rotating shaft, the opening of the mounting groove is close to the push rod shaft, the part of the main shaft close to the push rod shaft is passed through the mounting groove, the limiting elastic member is located in the mounting groove, and the limiting elastic member is connected between the inner wall of the mounting groove and the push rod shaft to give the push rod shaft a force to move the lifting drive member.

[0008] Furthermore, the rotary lifting transmission mechanism also includes a sleeve, which is sleeved outside the main shaft, and the rotating shaft is sleeved outside the sleeve; a sleeve protrusion is provided on the outer peripheral wall of the sleeve, and a push rod protrusion is provided on the outer peripheral wall of the push rod shaft; in the axial direction of the main shaft, one end of the sleeve is connected to the push rod protrusion; the limiting elastic member is connected to the sleeve protrusion.

[0009] Furthermore, the limiting elastic member is a compression spring, the compression spring is sleeved outside the sleeve, and the compression spring abuts against the sleeve.

[0010] Furthermore, the first disc spring is clamped between the sleeve and the push rod protrusion, and the first disc spring is connected and fixed to the push rod shaft through friction force.

[0011] Furthermore, a main shaft protrusion is provided at one end of the main shaft away from the push rod shaft, and an end of the sleeve away from the push rod shaft is connected to the main shaft protrusion. The second disc spring is clamped between the sleeve and the main shaft protrusion, and the second disc spring is connected and fixed to the main shaft by friction.

[0012] Furthermore, a threaded hole is provided at one end of the main shaft, and the push rod shaft includes a first section and a second section connected to each other, the diameter of the first section is smaller than the diameter of the second section, and the push rod protrusion is arranged on the second section; the first section is provided with an external thread, and the first section is tightened in the threaded hole, and one end of the main shaft abuts against the part of the second section that extends out of the first section.

[0013] Furthermore, the rotary lifting transmission mechanism also includes a top cover; the end wall of the rotating shaft away from the push rod shaft is provided with a weight reducing groove, the top cover is connected to the rotating shaft to cover the weight reducing groove, the second disc spring is fixedly connected to the top cover, and the top cover is sleeved outside the main shaft.

[0014] The present invention provides a rotary lifting drive device, comprising a lifting drive member, a rotary drive member and the above-mentioned rotary lifting transmission mechanism; the rotary drive member comprises a motor stator and a motor mover, the lifting drive member is transmission-connected to the push rod shaft, and the motor mover is fixedly connected to the first disc spring.

[0015] The lifting drive component includes a base, a driving motor, a driving wheel, a driven wheel, a steel belt and a rocker arm, and the rocker arm includes a connecting part and a rotating part; the driving motor is connected to the base, the output shaft of the driving motor is transmission-connected to the driving wheel, the driving wheel is transmission-connected to the driven wheel, one end of the steel belt is connected to the driven wheel, the other end of the steel belt is connected to the connecting part, the rotating part is rotationally connected to the base, and the rocker arm is provided with a connecting part connected to the push rod shaft.

[0016] It should be understood that both the foregoing general description and the following detailed description are for purposes of illustration and description and are not necessarily limiting of the present disclosure. The accompanying drawings, which are incorporated into and constitute a part of the specification, illustrate the subject matter of the present disclosure. Together, the description and the drawings serve to explain the principles of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a structural diagram of a rotary lifting mechanism according to an embodiment of the present invention;

[0019] Figure 2 for Figure 1 A cross-sectional view of the rotary lifting mechanism shown;

[0020] Figure 3 A schematic structural diagram of a rotary lifting mechanism according to another embodiment of the present invention;

[0021] Figure 4 This is a structural diagram of a rotary lifting drive device according to an embodiment of the present invention;

[0022] Figure 5 for Figure 4 A perspective view of a lifting drive member in the rotary lifting drive device shown;

[0023] Figure 6 This is a cross-sectional view of a lifting drive component in a rotary lifting drive device according to another embodiment of the present invention.

[0024] Icons: 1-spindle; 2-rod shaft; 3-first disc spring; 4-second disc spring; 5-rotating axis; 6-limiting elastic member; 7-sleeve; 8-sleeve protrusion; 9-rod protrusion; 10-spindle protrusion; 20-top cover; 30-motor stator; 40-motor mover; 51-mounting slot; 52-weight reduction slot; 60-circular grating; 110-rocker arm bracket; 120-motor bracket; 130-drive motor; 140-driving wheel; 150-driven wheel; 160-steel belt; 170-rocker arm; 180-connecting part; 190-sealing cover; 200-synchronous belt; 210-limiting pin; 220-limiting block; 111-connecting slot; 112-mounting cavity; 113-strip slot; 171-connecting part; 172-rotating part. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention.

[0027] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0030] It should be noted that the rotary lifting mechanism provided in the embodiment of the present application can be applied to equipment that requires simultaneous rotation and lifting, and is particularly suitable for lifting within a small range, such as a lifting range of -2mm to -2mm.

[0031] like Figure 1 and Figure 2 As shown, the present invention provides a rotary lifting transmission mechanism, including: a main shaft assembly and a first disc spring 3; the main shaft assembly includes a main shaft 1 and a push rod shaft 2, the push rod shaft 2 is fixedly connected to one end of the main shaft 1, and the first disc spring 3 is sleeved and fixed outside the push rod shaft 2; the first disc spring 3 is used to be connected to the rotary driving member for transmission so that it can rotate around the central axis of the main shaft 1, and the push rod shaft 2 is used to be connected to the lifting driving member for transmission so that it can move along the axial direction of the main shaft 1.

[0032] In this embodiment, the rotary drive member drives the first disc spring 3 to rotate, and the first disc spring 3 drives the main shaft 1 to rotate; the lifting drive member drives the push rod shaft 2 to move in the axial direction of the main shaft 1, thereby driving the push rod shaft 2 to move the main shaft 1; because the first disc spring 3 can deform in the axial direction of the main shaft 1, it can adapt to the lifting and lowering of the main shaft 1, and can simultaneously drive the main shaft 1 to rotate during the lifting and lowering process of the main shaft 1, thereby realizing the rotation transmission and lifting transmission of the main shaft 1; under the same external load, compared with the traditional rotary lifting drive device, the rotary lifting mechanism provided by this embodiment only needs to drive the main shaft assembly to rotate and overcome the elastic force of the first disc spring 3, and the lifting drive member does not need to drive the rotary drive member and other components to move, thereby reducing the load of the lifting drive member, thereby reducing the power required by the lifting drive member, and further reducing the power required by the entire rotary lifting drive device. In addition, in the rotary lifting transmission mechanism provided by this embodiment, the rotary transmission and lifting transmission are both realized through the main shaft assembly, integrating the rotary transmission and lifting transmission together, which can make the rotary transmission mechanism compact, highly integrated, and occupy less space, thereby making the rotary lifting drive device compact, highly integrated, and occupying less space.

[0033] It should be noted that the push rod shaft 2 and the main shaft 1 are coaxially arranged.

[0034] The push rod shaft 2 can be integrally formed with the main shaft 1, or can be connected by welding, clamping, etc.

[0035] like Figure 2 As shown, based on the above embodiment, the rotary lifting transmission mechanism further includes a rotary shaft 5 and a second disc spring 4; one end of the rotary shaft 5 is connected to the second disc spring 4, the second disc spring 4 is sleeved and fixed outside the main shaft 1, the rotary shaft 5 is sleeved outside the main shaft 1, and the other end of the rotary shaft 5 is used for transmission connection with the rotary driving member.

[0036] In this embodiment, during the movement of the rotary drive member, the first disc spring 3 and the rotating shaft 5 are simultaneously driven to move. The first disc spring 3 drives the push rod shaft 2 to rotate, and the push rod shaft 2 drives the main shaft 1 to rotate; the rotating shaft 5 drives the second disc spring 4 to move, and the second disc spring 4 drives the main shaft 1 to move. That is, the first disc spring 3 and the second disc spring 4 can simultaneously drive the main shaft assembly to rotate. The first disc spring 3 and the second disc spring 4 are spaced apart in the axial direction of the main shaft 1, so that the main shaft assembly can be supported at least in two positions, which can ensure smooth movement of the main shaft assembly and smooth movement of the main shaft 1. It should be noted that the lifting drive member also needs to overcome the elastic force of the second disc spring 4.

[0037] like Figure 2 As shown, on the basis of the above embodiment, the rotary lifting transmission mechanism further includes a limiting elastic member 6; a mounting groove 51 is provided on one end wall of the rotating shaft 5, the opening of the mounting groove 51 is close to the push rod shaft 2, and the part of the main shaft 1 close to the push rod shaft 2 is passed through the mounting groove 51 (it can also be understood that one end of the main shaft 1 passes through the mounting groove 51 to be connected with the push rod shaft 2), the limiting elastic member 6 is located in the mounting groove 51, and the limiting elastic member 6 is connected between the inner wall of the mounting groove 51 and the push rod shaft 2 to give the push rod shaft 2 a force to move toward the lifting drive member.

[0038] In this embodiment, the limiting elastic member 6 can be supported by the rotating shaft 5 to apply a certain force to the push rod shaft 2, so that the push rod shaft 2 has a tendency to move toward the lifting drive member. That is, the limiting elastic member 6 can press the push rod shaft 2 and the lifting drive member together, so that the push rod shaft 2 and the lifting drive member are always in contact, thereby ensuring that the lifting drive member drives the push rod shaft 2 to move stably, avoiding the need for a complex connection structure between the lifting drive member and the push rod shaft 2, thereby making the structure of the rotary lifting drive device simpler and more compact. When the main shaft 1 moves in a direction away from the lifting drive member, the limiting elastic member 6 can store energy. When the main shaft 1 returns, that is, when the lifting drive member drives the push rod shaft 2 to return, the limiting elastic member 6 further presses the push rod shaft 2 and the lifting drive member together. At this time, the lifting drive member also needs to overcome the thrust of the limiting elastic member 6.

[0039] like Figure 2 As shown, on the basis of the above embodiment, the rotary lifting transmission mechanism further includes a sleeve 7, the sleeve 7 is sleeved outside the main shaft 1, and the rotating shaft 5 is sleeved outside the sleeve 7; a sleeve protrusion 8 is provided on the outer peripheral wall of the sleeve 7, and a push rod protrusion 9 is provided on the outer peripheral wall of the push rod shaft 2; in the axial direction of the main shaft 1, one end of the sleeve 7 is connected to the push rod protrusion 9; and the limiting elastic member 6 is connected to the sleeve protrusion 8.

[0040] In this embodiment, when the push rod shaft 2 moves, it also drives the sleeve 7 and the main shaft 1 to move. The limiting elastic member 6 applies force to the push rod shaft 2 through the sleeve 7.

[0041] The limiting elastic member 6 may be a spring sheet, a block-shaped body made of elastic material, etc.

[0042] As an alternative, Figure 2 As shown, the limiting elastic member 6 is a compression spring, which is sleeved outside the sleeve 7 and abuts against the sleeve 7. The limiting elastic member 6 of this structure is simple in structure and has reliable and stable movement.

[0043] like Figure 2 As shown, on the basis of the above embodiment, the first disc spring 3 is further clamped between the sleeve 7 and the push rod protrusion 9, that is, the surface of one side of the first disc spring 3 abuts against the sleeve 7, and the surface of the other side of the first disc spring 3 abuts against the push rod protrusion 9. The sleeve 7 and the push rod protrusion 9 clamp the first disc spring 3, and the first disc spring 3 is connected and fixed to the push rod shaft 2 by friction. This method makes the connection between the first disc spring 3 and the push rod shaft 2 simple.

[0044] like Figure 2 As shown, based on the above embodiment, further, a main shaft protrusion 10 is provided at the end of the main shaft 1 away from the push rod shaft 2, and the end of the sleeve 7 away from the push rod shaft 2 is connected to the main shaft protrusion 10, and the second disc spring 4 is clamped between the sleeve 7 and the main shaft protrusion 10, and the second disc spring 4 is connected and fixed to the main shaft 1 by friction.

[0045] In this embodiment, one side of the second disc spring 4 abuts against the main shaft protrusion 10, and the other side of the second disc spring 4 abuts against the sleeve 7. The main shaft protrusion 10 and the sleeve 7 clamp the second disc spring 4. The second disc spring 4 is connected and fixed to the main shaft 1 through friction, and the connection structure is simple.

[0046] like Figure 2 As shown, based on the above embodiment, one end of the main shaft 1 is further provided with a threaded hole, the push rod shaft 2 includes a first section and a second section connected to each other, the diameter of the first section is smaller than the diameter of the second section, and the push rod protrusion 9 is arranged on the second section; the first section is provided with an external thread, the first section is tightened in the threaded hole, and one end of the main shaft 1 abuts against the part of the second section extending out of the first section.

[0047] In this embodiment, the connection and fixation between the push rod shaft 2 and the main shaft 1 is achieved by threaded connection. The second disc spring 4 is clamped between the main shaft protrusion 10 and the sleeve 7, the first disc spring 3 is placed, and then the push rod shaft 2 is tightened into the main shaft 1. During the tightening process of the push rod shaft 2, the first disc spring 3 and the second disc spring 4 are gradually tightened, thereby completing the connection and fixation between multiple components. The operation is simple and the installation is convenient.

[0048] like Figure 1 and Figure 2As shown, based on the above embodiment, the rotary lifting transmission mechanism further includes a top cover 20; the end wall of the rotating shaft 5 away from the top rod shaft 2 is provided with a weight reducing groove 52, the top cover 20 is connected to the rotating shaft 5 to cover the weight reducing groove 52, the second disc spring 4 is fixedly connected to the top cover 20, and the top cover 20 is arranged outside the main shaft 1.

[0049] In this embodiment, a weight-reducing groove 52 is provided on the rotating shaft 5 to reduce the overall weight of the rotating transmission mechanism.

[0050] The top cover 20 may include a base plate and a protrusion fixed to the base plate. The protrusion has an external thread on its outer peripheral wall, and the inner wall of the opening of the weight-reducing groove 52 has an internal thread. The protrusion is tightened into the weight-reducing groove 52 to connect the top cover 20 to the rotating shaft 5. This connection structure is simple and easy to install. The top cover 20 and the rotating shaft 5 may also be connected using fasteners such as screws or bolts. Alternatively, a combination of the above connection methods may be used.

[0051] Furthermore, if Figure 3 As shown, a circular grating 60 can be mounted on the outer surface of the rotating shaft 5. Furthermore, a support plate is provided below the rotating shaft 5. The support plate and the top cover 20 are positioned opposite each other, and the support plate and the top cover 20 clamp and secure the circular grating 60. The securing method for the circular grating 60 is simple in structure. The circular grating 60 is secured during the process of tightening the top cover 20 into the weight-reducing groove 52, making assembly convenient and quick. The circular grating 60 can be used to detect and feedback position signals or speed signals of the spindle 1.

[0052] Furthermore, the verticality of the main shaft 1 can be ensured by the coaxiality of the first disc spring 3 and the second disc spring 4 and the rigidity of the main shaft 1. A linear bearing or an oil-free bushing can also be set in the weight reduction groove 52 to ensure the verticality of the main shaft 1.

[0053] like Figure 4 As shown, an embodiment of the present invention further provides a rotary lifting drive device, comprising a lifting drive member, a rotary drive member and a rotary lifting transmission mechanism of any of the above technical solutions; the rotary drive member comprises a motor stator 30 and a motor mover 40, the lifting drive member is transmission-connected to the top rod shaft 2, the motor mover 40 is fixedly connected to the first disc spring 3, and the rotary lifting drive device has all the beneficial technical effects of the rotary lifting transmission mechanism, which will not be repeated here.

[0054] Among them, the first disc spring 3 is connected to the motor mover 40 through fasteners such as bolts or pins. The number of fasteners can be multiple, and the multiple fasteners are arranged at intervals along the circumferential direction of the first disc spring 3.

[0055] Similarly, the second disc spring 4 is connected to the top cover 20 by fasteners such as bolts or pins. The number of fasteners can be multiple, and the multiple fasteners are arranged at intervals along the circumference of the second disc spring 4. The connection method between the first disc spring 3 and the motor mover 40 can be the same as the connection method between the second disc spring 4 and the top cover 20.

[0056] like Figure 4 and Figure 5 As shown, the lifting drive component includes: a base, a driving motor 130, a driving wheel 140, a driven wheel 150, a steel belt 160 and a rocker arm 170, and the rocker arm 170 includes a connecting part 171 and a rotating part 172; the driving motor 130 is connected to the base, the output shaft of the driving motor 130 is transmission-connected to the driving wheel 140, the driving wheel 140 is transmission-connected to the driven wheel 150, one end of the steel belt 160 is connected to the driven wheel 150, the other end of the steel belt 160 is connected to the connecting part 171, the rotating part 172 is rotationally connected to the base, and the rocker arm 170 is provided with a connecting part 180 for connecting to the push rod shaft 2 (the connecting part 180 can be directly connected to the push rod shaft 2, and the connecting part 180 can also be indirectly connected to the push rod shaft 2 through an intermediate shaft).

[0057] In this embodiment, when the driving motor 130 is working, the output shaft can drive the driving wheel 140 to rotate, and the driving wheel 140 drives the driven wheel 150 to rotate. The driven wheel 150 spreads or rolls up the steel belt 160, thereby realizing the extension and retraction of the steel belt 160. The connecting portion 171 of the rocker arm 170 is connected to the steel belt 160, and the rotating portion 172 of the rocker arm 170 is rotatably connected to the base. The steel belt 160 is extended and retracted, thereby driving the connecting portion 171 to descend or rise, thereby causing the rotating portion 172 of the rocker arm 170 to rotate relative to the base, that is, the entire rocker arm 170 is realized to rotate relative to the base, and the rocker arm 170 rotates with the base. The parts outside the rotating point of the dynamic connection all move in the longitudinal direction of the steel belt 160, that is, they move upward in the lifting direction of the push rod shaft 2; the part of the rocker arm 170 located on the side of the rotating part 172 close to the connecting part 171 descends as the steel belt 160 extends and rises as the steel belt 160 contracts, while the part of the rocker arm 170 located on the side of the rotating part 172 away from the connecting part 171 rises as the steel belt 160 extends and descends as the steel belt 160 contracts; thus, the connecting member 180 provided on the rocker arm 170 can be raised and lowered, thereby driving the push rod shaft 2 connected to the connecting member 180 to rise and fall. The steel belt 160 is rolled up or unrolled to achieve the extension and contraction of the steel belt 160, thereby reducing the size in the lifting direction and the space occupied in the lifting direction, making the lifting drive device compact, space-saving, and highly integrated; the rocker arm 170 structure is used to achieve lifting drive, which is suitable for small-scale lifting and precise control.

[0058] like Figure 4 and Figure 5As shown, based on the above embodiment, the connecting member 180 is further rotatably connected to the rocker arm 170, and the outer contour of the connecting member 180 for contacting with the push rod shaft 2 is an arc shape.

[0059] In this embodiment, the connecting member 180 is rotationally connected to the rocker arm 170, and the outer contour of the connecting member 180 abuts against the push rod shaft 2 (for example, the execution shaft). When the connecting member 180 moves with the rocker arm 170, the connecting member 180 drives the push rod shaft 2 to rise and fall. Since the connecting member 180 not only moves in the lifting direction, but also rotates centered on the rotation connection point between the rotating part 172 and the base, there is relative sliding between the connecting member 180 and the push rod shaft 2. The connecting member 180 is rotationally connected to the rocker arm 170, and the outer contour of the connecting member 180 is arranged in an arc shape, which can reduce the resistance between the connecting member 180 and the push rod shaft 2, thereby ensuring that the push rod shaft 2 is driven to move smoothly.

[0060] The connecting member 180 may include a rotating shaft and a roller, the roller is sleeved on the rotating shaft, a mounting cavity is provided on the rocker arm 170, the rotating shaft is fixed in the mounting cavity, and the roller abuts against the push rod shaft 2.

[0061] As an optional solution, the connecting member 180 is a bearing, which is easy to install and rotates smoothly.

[0062] On the basis of the above embodiments, further, the positional relationship between the connecting portion 171, the rotating portion 172 and the connecting member 180 can be set as needed, for example: the connecting member 180 and the connecting portion 171 are respectively located at the two ends of the rocker arm 170, and the rotating portion 172 is located between the connecting portion 171 and the connecting member 180.

[0063] As an alternative, Figures 4 to 6 As shown, the connecting portion 171 and the rotating portion 172 are respectively located at two ends of the rocker arm 170 , and the connecting member 180 is located between the connecting portion 171 and the rotating portion 172 , and the connecting member 180 is arranged close to the rotating portion 172 .

[0064] In this embodiment, the connector 180 is disposed between the rotating portion 172 and the connecting portion 171. Thus, the connector 180 descends as the steel belt 160 extends and ascends as the steel belt 160 contracts, thereby facilitating control of the lifting motion. Furthermore, the drive motor 130 is relatively far from the connector 180, and thus also from the mandrel shaft 2, which facilitates a more rational distribution layout.

[0065] like Figures 4 to 6As shown, based on any of the above embodiments, the base further includes a rocker arm bracket 110 and a motor bracket 120 that are connected to each other; the rocker arm bracket 110 and the motor bracket 120 are respectively provided with through holes, the rotating part 172 is rotatably connected to the rocker arm bracket 110, the drive motor 130 is connected to the motor bracket 120, the driven wheel 150 is rotatably connected to the motor bracket 120, the driving wheel 140 and the steel belt 160 are both in the motor bracket 120, and the connecting part 171 extends into the motor bracket 120 through the through hole to be connected to the steel belt 160.

[0066] In this embodiment, the base includes a rocker arm bracket 110 and a motor bracket 120. The rocker arm bracket 110 and the motor bracket 120 can be set with corresponding structures according to the specific installation environment, which is also beneficial to reducing the weight of the base, thereby facilitating the lightweighting of the lifting drive device.

[0067] Specifically, the motor bracket 120 is set in a U shape, the fixing part of the drive motor 130 is fixed on the outside of the motor bracket 120, the output shaft of the drive motor 130 passes through the first side wall of the motor bracket 120 and is rotatably connected to the second side wall opposite to the first side wall, the driven wheel 150 can be rotatably connected to the first side wall and the second side wall through the rotating shaft, the driven wheel 150 is set parallel to the axial direction and the axial direction of the output shaft of the drive motor 130, and the driving wheel 140 is coaxially fixed with the output shaft of the drive motor 130. Such a structure is compact and reduces space occupation.

[0068] The rocker arm bracket 110 and the motor bracket 120 can be connected by integral molding, welding, clamping or threaded connection.

[0069] like Figures 4 to 6 As shown, based on the above embodiment, further, in the length direction of the steel belt 160, a connecting groove 111 is provided on one side of the rocker arm bracket 110, and an installation cavity 112 is provided on the other side of the rocker arm bracket 110, and the rocker arm 170 is rotatably connected in the installation cavity 112.

[0070] In this embodiment, the connecting groove 111 can be used to connect with the push rod shaft 2. The connecting groove 111 can limit the push rod shaft 2 and further reduce the weight of the base, thereby further reducing the weight of the lifting drive device. The mounting cavity 112 can also further reduce the weight of the base, thereby further reducing the weight of the lifting drive device.

[0071] like Figure 4 and Figure 5 As shown, based on the above embodiment, further, a strip groove 113 is provided on the bottom plate of the connecting groove 111, a connecting port is provided on the bottom plate of the strip groove 113, and a portion of the connecting member 180 extends out of the connecting port; a through hole is also provided on the bottom plate of the connecting groove 111, and a portion of the rotating part 172 extends out of the through hole.

[0072] In order to avoid interference between the rotating portion 172 and the push rod shaft 2, the top of the connecting portion 171 (the side away from the installation cavity) can be set into a polygonal or arc shape. A flow channel for medium circulation can be set on the side wall of the strip groove 113.

[0073] like Figure 4 and Figure 6 As shown, based on the above embodiment, further, the connecting member 180 is located between the connecting portion 171 and the rotating portion 172, and the connecting member 180 is arranged close to the rotating portion 172. The lifting drive device also includes a lower limit member provided on the base, the lower limit member is located in the descending direction of the connecting portion 171, and the lower limit member can contact the connecting portion 171 to prevent the connecting portion 171 from continuing to descend.

[0074] In this embodiment, during the descent of the connecting member 180, after the connecting member 180 rises a certain distance, the lower limit member can abut against the connecting portion 171, thereby preventing the rocker arm 170 from continuing to rotate, preventing the connecting member 180 from continuing to descend, and avoiding the connecting member 180 from descending excessively.

[0075] As an alternative, Figure 2 As shown, the lower limiting member includes a limiting nail 210 , which is fixed on the side wall of the rocker arm bracket 110 close to the motor bracket 120 .

[0076] As an alternative, Figure 3 As shown, the base further includes a sealing cover 190 , which is detachably connected to the opening of the installation cavity 112 , and the lower limiting member includes a limiting block 220 provided on the sealing cover 190 .

[0077] It should be noted that only the limiting pin 210 or only the limiting block 220 may be provided, or both the limiting pin 210 and the limiting block 220 may be provided.

[0078] Based on the above embodiment, the connecting member 180 is located between the connecting portion 171 and the rotating portion 172, and is positioned near the rotating portion 172. The connecting portion 171 extends through a through hole into the motor bracket 120 to connect with the steel belt 160. In other words, the connection between the connecting portion 171 and the steel belt 160 is located within the motor bracket 120. An upper limit member can be provided on the motor bracket 120. The upper limit member is located in the direction of the upward movement of the connecting portion 171 and can contact the connecting portion 171 to prevent the connecting portion 171 from rising further.

[0079] In this embodiment, during the raising process of the connecting member 180, when the connecting member 180 is raised a certain distance, the upper limit member can abut against the connecting portion 171, thereby preventing the rocker arm 170 from continuing to rotate, preventing the connecting member 180 from continuing to rise, and avoiding the connecting member 180 from rising excessively.

[0080] Among them, a protrusion can be set on the motor bracket 120, which can contact the connecting portion 171 to prevent the connecting portion 171 from continuing to rise. Optionally, the upper edge of the through hole of the motor bracket 120 forms an upper limit member, which has a simple structure, avoids setting too many parts, and simplifies assembly.

[0081] On the base support of the above embodiment, a gear transmission can be provided between the driving wheel 140 and the driven wheel 150. Optionally, the lifting drive device further includes a synchronous belt 200. The driving wheel 140 is coaxially fixed to the output shaft of the drive motor 130, and the synchronous belt 200 is connected between the driving wheel 140 and the driven wheel 150, thereby simplifying the transmission structure.

[0082] Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will appreciate that the technical solutions described in the aforementioned embodiments may be modified or some or all of the technical features therein may be replaced with equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the various embodiments of the present invention. In the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not described in detail so as not to obscure the understanding of this description. In addition, those skilled in the art will appreciate that although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features from different embodiments is meant to be within the scope of the present invention and to form different embodiments.

Claims

1. A rotary lifting transmission mechanism, characterized in that: include: A spindle assembly and a first disc spring; the spindle assembly includes a spindle and a push rod shaft, the push rod shaft is fixedly connected to one end of the spindle, and the first disc spring is sleeved and fixed outside the push rod shaft; the first disc spring is used to be connected to the rotating drive member so as to be rotatable about the central axis of the spindle, and the push rod shaft is used to be connected to the lifting drive member so as to be movable along the axial direction of the spindle; The rotary drive member drives the first disc spring to rotate, the first disc spring drives the push rod shaft to rotate, the push rod shaft drives the main shaft to rotate, and the lifting drive member drives the push rod shaft to move in the axial direction of the main shaft, so that the push rod shaft drives the main shaft to move; The rotary lifting transmission mechanism further includes a rotary shaft and a second disc spring; one end of the rotary shaft is connected to the second disc spring, the second disc spring is sleeved and fixed outside the main shaft, the rotary shaft is sleeved outside the main shaft, and the other end of the rotary shaft is used for transmission connection with the rotary driving member; A top cover is provided on the upper part of the rotating shaft and is sleeved outside the main shaft. A support plate is provided on the lower part of the rotating shaft, and the support plate and the top cover are arranged opposite to each other. A circular grating is provided outside the rotating shaft, and the support plate and the top cover clamp and fix the circular grating. The circular grating is used to detect and feedback the position signal or speed signal of the main shaft.

2. The rotary lifting transmission mechanism according to claim 1, characterized in that: The rotary lifting transmission mechanism also includes a limiting elastic member; a mounting groove is provided on one end wall of the rotary shaft, the opening of the mounting groove is close to the push rod shaft, the part of the main shaft close to the push rod shaft is passed through the mounting groove, the limiting elastic member is located in the mounting groove, and the limiting elastic member is connected between the inner wall of the mounting groove and the push rod shaft to give the push rod shaft a force to move the lifting drive member.

3. The rotary lifting transmission mechanism according to claim 2, characterized in that: The rotary lifting transmission mechanism also includes a sleeve, which is sleeved outside the main shaft, and the rotating shaft is sleeved outside the sleeve; a sleeve protrusion is provided on the outer peripheral wall of the sleeve, and a push rod protrusion is provided on the outer peripheral wall of the push rod shaft; in the axial direction of the main shaft, one end of the sleeve is connected to the push rod protrusion; the limiting elastic member is connected to the sleeve protrusion.

4. The rotary lifting transmission mechanism according to claim 3, characterized in that: The limiting elastic member is a compression spring, which is sleeved outside the sleeve and abuts against the sleeve.

5. The rotary lifting transmission mechanism according to claim 3, characterized in that: The first disc spring is clamped between the sleeve and the push rod protrusion, the first disc spring is connected and fixed to the push rod shaft by friction force and / or the end of the main shaft away from the push rod shaft is provided with a main shaft protrusion, the end of the sleeve away from the push rod shaft is connected to the main shaft protrusion, the second disc spring is clamped between the sleeve and the main shaft protrusion, and the second disc spring is connected and fixed to the main shaft by friction force.

6. The rotary lifting transmission mechanism according to claim 3, characterized in that: A threaded hole is provided at one end of the main shaft, and the push rod shaft includes a first section and a second section connected to each other, the diameter of the first section is smaller than the diameter of the second section, and the push rod protrusion is arranged on the second section; an external thread is provided on the first section, and the first section is tightened in the threaded hole, and one end of the main shaft abuts against the part of the second section that extends out of the first section.

7. The rotary lifting transmission mechanism according to any one of claims 1 to 6, characterized in that: The end wall of the rotating shaft away from the push rod shaft is provided with a weight-reducing groove, the top cover is connected to the rotating shaft and covers the weight-reducing groove, and the second disc spring is fixedly connected to the top cover.

8. A rotary lifting drive device, characterized in that: It includes a lifting drive member, a rotating drive member and a rotating lifting transmission mechanism as described in any one of claims 1 to 7; the rotating drive member includes a motor stator and a motor mover, the lifting drive member is connected to the push rod shaft, and the motor mover is fixedly connected to the first disc spring.

9. The rotary lifting drive device according to claim 8, characterized in that: The lifting drive component includes: a base, a driving motor, a driving wheel, a driven wheel, a steel belt and a rocker arm, and the rocker arm includes a connecting part and a rotating part; the driving motor is connected to the base, the output shaft of the driving motor is transmission-connected to the driving wheel, the driving wheel is transmission-connected to the driven wheel, one end of the steel belt is connected to the driven wheel, the other end of the steel belt is connected to the connecting part, the rotating part is rotationally connected to the base, and the rocker arm is provided with a connecting part connected to the push rod shaft.

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