Electric landing leg slow descending structure

Abstract

The utility model relates to the technical field of electric supporting legs, and discloses an electric supporting leg slow descending structure which comprises a driving mechanism, an outer pipe, an inner pipe, a fixing block, a ball screw, a one-way bearing and a friction ring. Wherein the outer pipe is sleeved with the inner pipe, so that the inner pipe can axially move in the outer pipe, and the outer pipe is fixedly connected with the driving mechanism; the fixed block is fixed in the outer pipe; the ball screw penetrates through the fixing block, is in transmission connection with the driving mechanism and is in sliding connection with the inner pipe. The inner pipe is sleeved with the ball screw, so that the ball screw can axially move in the inner pipe; the ball screw is sleeved with the one-way bearing, and the one-way bearing is fixed to the ball screw and arranged on the side, close to the driving mechanism, of the fixing block. The friction ring is arranged outside the one-way bearing in a sleeving mode and is in contact connection with the one-way bearing, and the friction ring is used for limiting rotation of the ball screw by limiting rotation of the one-way bearing when the ball screw is subjected to axial pressure.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electric outriggers, and in particular to an electric outrigger slow-descent structure. Background Art

[0002] At present, electric outriggers generally use trapezoidal screws or ball screws with gear reducers and motors for power transmission; compared with trapezoidal screws, ball screws have higher transmission efficiency. Since ball screws have higher transmission efficiency, when the electric outriggers are loaded with lifting objects, the ball screws tend to drop quickly during the descent process, which may cause the lifting objects to be damaged by excessive vibration when the lifting mechanism lands.

[0003] Therefore, the prior art needs to be improved. Utility Model Content

[0004] In view of the defects of the prior art, the present invention provides an electric outrigger slow-descent structure, which aims to solve the technical problem in the related art that when the electric outrigger is loaded with a lifting object, its ball screw tends to descend rapidly, thereby causing damage to the lifting object.

[0005] The technical solutions adopted by the present disclosure to solve the above technical problems are as follows:

[0006] The present invention discloses an electric outrigger slow-descent structure, comprising:

[0007] Driving mechanism;

[0008] An outer tube and an inner tube are slidably connected; the outer tube is sleeved with the inner tube so that the inner tube can move axially in the outer tube, and the outer tube is fixedly connected to the driving mechanism;

[0009] A fixed block, fixed inside the outer tube;

[0010] A ball screw passes through the fixing block, is in driving connection with the driving mechanism, and is slidably connected with the inner tube; the inner tube is sleeved with the ball screw so that the ball screw can move axially in the inner tube;

[0011] a one-way bearing, which is sleeved outside the ball screw and fixed to the ball screw, and is arranged on a side of the fixed block close to the driving mechanism; and

[0012] A friction ring is sleeved outside the one-way bearing and is in contact with the one-way bearing, and is used to limit the rotation of the ball screw by limiting the rotation of the one-way bearing when the ball screw is subjected to axial pressure.

[0013] In some embodiments, a first flat key is disposed between the ball screw and the one-way bearing, and a second flat key is disposed between the one-way bearing and the friction ring. The ball screw is provided with a first groove, the one-way bearing is provided with a second groove and a third groove, and the friction ring is provided with a fourth groove. The first flat key is located in the first groove and the second groove, and the second flat key is located in the third groove and the fourth groove.

[0014] In some embodiments, the electric leg lowering structure further includes a friction clamp; the friction clamp is disposed between the one-way bearing and the fixed block and clamps the ball screw to limit the rotation of the ball screw when the ball screw is subjected to an axial pressure.

[0015] In some embodiments, the input end of the ball screw is in transmission connection with the output end of the driving mechanism through a coupling.

[0016] In some embodiments, a compression spring is sleeved on the coupling, and the compression spring abuts against the coupling and the output end of the driving mechanism.

[0017] In some embodiments, the electric leg lowering structure further includes a thrust ball bearing; the thrust ball bearing is sleeved and fixed on the ball screw and is disposed on a side of the fixed block away from the driving mechanism; the ball screw sequentially passes through the thrust ball bearing, the fixed block, and the one-way bearing.

[0018] In some embodiments, the one-way bearing is a one-way ball bearing, a one-way roller bearing, or a one-way needle bearing.

[0019] In some embodiments, the outer tube is screwed to the driving mechanism.

[0020] In some embodiments, the electric leg lowering structure further includes a universal base; the universal base is detachably fixed to an end of the inner tube away from the driving mechanism.

[0021] In some embodiments, the outer surface of the ball screw is coated with a lubricating oil layer.

[0022] Beneficial effects: By arranging the ball screw to sequentially pass through the fixed block and the one-way bearing, the present disclosure enables the transmission efficiency of the electric leg during the lifting action to remain high; and by sleeving a friction ring on the one-way bearing, the transmission efficiency of the electric leg when loading a lifting object is reduced, thereby avoiding the rapid descent of the lifting object and damage. Therefore, the present disclosure solves the technical problem that in the related art, when the electric leg loads a lifting object, the ball screw often descends rapidly, resulting in damage to the lifting object. Description of the Drawings

[0023] To more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the drawings required for the embodiments. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0024] Figure 1 It is a three-dimensional structural schematic diagram of an electric outrigger slow descent structure provided in some embodiments of the present disclosure.

[0025] Figure 2 It is an internal structural schematic diagram of an electric outrigger slow descent structure provided in some embodiments of the present disclosure.

[0026] Figure 3 It is an exploded structural schematic diagram of an electric outrigger slow descent structure provided in some embodiments of the present disclosure.

[0027] Figure 4 It is another exploded structural schematic diagram of an electric outrigger slow descent structure provided in some embodiments of the present disclosure.

[0028] Figure 5 It is yet another exploded structural schematic diagram of an electric outrigger slow descent structure provided in some embodiments of the present disclosure.

[0029] Explanation of reference numerals:

[0030] 11, coupling; 12, compression spring; 51, first flat key; 52, first groove; 53, second groove; 56, second flat key; 57, third groove; 58, fourth groove; 61, friction ring; 62, friction clip; 74, thrust ball bearing; 75, universal base; 100, drive mechanism; 200, outer tube; 300, inner tube; 400, fixed block; 500, ball screw; 600, one-way bearing. Specific embodiments

[0031] Those skilled in the art can understand that, unless specifically stated otherwise, the singular forms "a", "the above", "the foregoing", "the said", and "the" used herein may also include the plural forms. It should be further understood that the term "comprising" used in the specification of the present disclosure means the presence of the described features, integers, steps, operations, elements, and / or modules, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, modules, and / or their groups. It can be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to other elements, or there may also be intermediate elements. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The phrase "and / or" used herein includes all or any unit and all combinations of one or more related listed items.

[0032] Those skilled in the art can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of those of ordinary skill in the art to which the present disclosure pertains. It should also be understood that terms such as those defined in a general dictionary should be understood as having a meaning consistent with the meaning in the context of the prior art, and will not be interpreted with an idealized or overly formal meaning unless specifically defined as here.

[0033] Please refer to Figure 1 、 Figure 2 、and Figure 3 , the present disclosure provides an electric outrigger slow descent structure, including: a driving mechanism 100, an outer tube 200, an inner tube 300, a fixing block 400, a ball screw 500, a one-way bearing 600, and a friction ring 61.

[0034] The driving mechanism 100 is connected to an additional power source and is in transmission connection with the ball screw, and is used to drive the ball screw to rotate. In some embodiments, as Figure 2 shown, the output end (which may be an output shaft) of the driving mechanism and the input end (which may be an input shaft) of the ball screw are in transmission connection through a coupling 11, so that the driving mechanism can transmit power and torque to the ball screw through the coupling; in one implementation manner of this embodiment, as Figure 2 shown, a compression spring 12 is sleeved on one end of the coupling connecting the driving mechanism, and the compression spring abuts against the coupling and the output end of the driving mechanism respectively, so that the compression spring can enhance the torque transmitted from the driving mechanism to the ball screw and play a role in vibration reduction when the electric outrigger is working.

[0035] The outer tube 200 is fixedly connected to the driving mechanism (e.g., screwed connection); in some embodiments, through holes are provided at one end of the outer tube and the output end of the driving mechanism, and the outer tube and the driving mechanism are fixed together by inserting a screw (e.g., self-tapping screw) into the through hole. A fixing block 400 is fixed inside the outer tube, that is to say, the fixing block and the outer tube are fixed together and there is no relative movement between them; in some embodiments, the fixing block can be fixed inside the outer tube by means of screwing. For example, through holes are provided on the surface of the outer tube and the surface of the fixing block, and the outer tube and the fixing block are fixed together by inserting a screw into the through hole. The outer tube is sleeved with the inner tube 300 so that the inner tube can axially move inside the outer tube. The specific sleeving method can refer to the prior art and will not be described here.

[0036] The ball screw 400 passes through the fixing block and there is a gap between them to prevent the surface of the fixing block from affecting the rotation of the ball screw; the ball screw is slidably connected to the inner tube, and the inner tube is sleeved with the ball screw so that the ball screw can axially move inside the inner tube. The specific sleeving method can refer to the prior art and will not be described here. In some embodiments, a lubricating oil layer is coated on the outer surface of the ball screw, so as to effectively reduce the wear generated during the rotation of the ball screw.

[0037] The one-way bearing 600 (which can be a one-way ball bearing, a one-way roller bearing, or a one-way needle bearing) is sleeved and fixed on the ball screw. The one-way bearing is arranged on the side of the fixing block close to the driving mechanism; that is to say, the ball screw passes through the fixing block and the one-way bearing in sequence. There may be a gap between the one-way bearing and the fixing block, so that the fixing block can limit the one-way bearing. As Figure 3 and Figure 4 shown, a friction ring 61 is sleeved outside the one-way bearing, and the friction ring 61 is in contact connection with the one-way bearing. The frictional force between the friction ring and the one-way bearing plays a role in restricting the rotation of the one-way bearing. In some embodiments, as Figure 5 shown, a first flat key 51 is provided at the socket of the ball screw and the one-way bearing. A first groove 52 adapted to the profile shape of the first flat key is provided on the outer surface of the ball screw, and a second groove 53 adapted to the profile shape of the first flat key is provided on the inner surface of the inner ring of the one-way bearing. The first flat key is located in the first groove and the second groove to achieve torque transmission when the ball screw rotates. In some embodiments, as Figure 5 shown, a second flat key 56 is provided at the socket of the one-way bearing and the friction ring. A third groove 57 adapted to the profile shape of the second flat key is provided on the outer surface of the outer ring of the one-way bearing, and a fourth groove 58 adapted to the profile shape of the second flat key is provided on the inner surface of the friction ring. The second flat key is located in the third groove and the fourth groove to increase the frictional force between the friction ring and the one-way bearing when the ball screw rotates.

[0038] During the working process of the electric outrigger descending slowly structure, when the ball screw is subjected to an axial tensile force (i.e., when the electric outrigger performs a jacking action), the ball screw rotates clockwise and undergoes an axial displacement in the direction approaching the driving mechanism; the balls (or needles, or rollers) in the one-way bearing rotate, causing the gap between the inner and outer rings of the one-way bearing to decrease, thereby reducing the frictional force between the one-way bearing and the ball screw, facilitating the transmission between the ball screw and the driving mechanism, and further ensuring the high efficiency of the electric outrigger during the jacking action. When the ball screw is subjected to an axial compressive force (i.e., when the electric outrigger is loaded with a jacking object), the ball screw rotates counterclockwise and undergoes an axial displacement in the direction away from the driving mechanism; the friction ring restricts the rotation of the ball screw by restricting the rotation of the one-way bearing, thereby restricting the transmission between the ball screw and the driving mechanism to a certain extent, that is, reducing the transmission efficiency of the electric outrigger, and further ensuring that the ball screw can descend slowly when the electric outrigger is loaded with a jacking object, that is, preventing the jacking object from descending too fast and being damaged.

[0039] In the above-mentioned electric outrigger descending slowly structure provided by the present disclosure, by arranging the ball screw to pass through the fixed block and the one-way bearing in sequence, the transmission efficiency of the electric outrigger during the jacking action is still high; and by sleeving a friction ring on the outside of the one-way bearing, the transmission efficiency of the electric outrigger when loaded with a jacking object is reduced, thereby preventing the jacking object from descending too fast and being damaged. Therefore, the present disclosure solves the technical problem in the related art that when the electric outrigger is loaded with a jacking object, its ball screw often descends rapidly, resulting in damage to the jacking object.

[0040] In some embodiments, such as Figure 3 and Figure 4 shown, the electric outrigger descending slowly structure of the present disclosure further includes a friction clamp 62. The friction clamp is arranged between the one-way bearing and the fixed block, abuts against the one-way bearing and the fixed block, and clamps the ball screw. When the ball screw is subjected to an axial compressive force, the frictional force between the friction clamp and the ball screw plays a role in restricting the rotation of the ball screw, thereby further restricting the transmission between the ball screw and the driving mechanism, that is, reducing the transmission efficiency of the electric outrigger, and further ensuring that the ball screw can descend slowly when the electric outrigger is loaded with a jacking object, that is, preventing the jacking object from descending too fast and being damaged.

[0041] In some embodiments, such as Figure 3 and Figure 4 shown, the electric outrigger descending slowly structure of the present disclosure further includes a thrust ball bearing 74. The thrust ball bearing (which can be a single-direction thrust ball bearing) is sleeved and fixed on the ball screw and is arranged on the side of the fixed block away from the driving mechanism; that is to say, the ball screw passes through the thrust ball bearing, the fixed block, and the one-way bearing in sequence. There may be a gap between the thrust ball bearing and the fixed block, so that the fixed block can limit the one-way bearing. When the ball screw rotates, the thrust ball bearing bears the pressure of the ball screw, which is beneficial to the stable rotation of the ball screw.

[0042] In some embodiments, as Figure 1 shown, the electric outrigger slow descent structure further includes a universal base 75, and the universal base is detachably fixed to one end of the inner tube away from the drive mechanism, so as to ensure the stability of the electric outrigger slow descent structure during operation and effectively prevent the electric outrigger from shaking during operation.

[0043] It can be understood that the orientation or positional relationship indicated by the terms "length", "width", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "side", "bottom", "inner", and "outer" in the present disclosure is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of description and simplification of the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present disclosure.

[0044] It can be understood that the terms "first" and "second" in the present disclosure are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present disclosure, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0045] It can be understood that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected", and "fixed" in the present disclosure should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific situations.

[0046] The above examples are only used to illustrate the present disclosure, rather than to limit the scope of the present disclosure. All modifications or changes made without departing from the spirit of the present disclosure fall within the protection scope of the present disclosure.

Claims

1. An electric outrigger slow-down structure, characterized in that: include: Driving mechanism; An outer tube and an inner tube are slidably connected; the outer tube is sleeved with the inner tube so that the inner tube can move axially in the outer tube, and the outer tube is fixedly connected to the driving mechanism; A fixed block, fixed inside the outer tube; A ball screw passes through the fixing block, is in driving connection with the driving mechanism, and is slidably connected with the inner tube; the inner tube is sleeved with the ball screw so that the ball screw can move axially in the inner tube; a one-way bearing, which is sleeved outside the ball screw and fixed to the ball screw, and is arranged on a side of the fixed block close to the driving mechanism; and A friction ring is sleeved outside the one-way bearing and is in contact with the one-way bearing, and is used to limit the rotation of the ball screw by limiting the rotation of the one-way bearing when the ball screw is subjected to axial pressure.

2. The electric outrigger slow-descent structure according to claim 1, characterized in that: A first flat key is arranged between the ball screw and the one-way bearing, a second flat key is arranged between the one-way bearing and the friction ring, the ball screw is provided with a first groove, the one-way bearing is provided with a second groove and a third groove, the friction ring is provided with a fourth groove, the first flat key is located in the first groove and the second groove, and the second flat key is located in the third groove and the fourth groove.

3. The electric outrigger slow-descent structure according to claim 1, characterized in that: It also includes a friction clamp; the friction clamp is arranged between the one-way bearing and the fixed block, and clamps the ball screw to limit the rotation of the ball screw when the ball screw is subjected to axial pressure.

4. The electric outrigger slow-descent structure according to claim 1, characterized in that: The input end of the ball screw is connected to the output end of the driving mechanism through a coupling.

5. The electric outrigger slow-descent structure according to claim 4, characterized in that: The coupling sleeve is provided with a compression spring, and the compression spring abuts against the coupling and the output end of the driving mechanism.

6. The electric outrigger slow-descent structure according to claim 1, characterized in that: It also includes a thrust ball bearing; the thrust ball bearing is sleeved and fixed on the ball screw and is arranged on a side of the fixed block away from the driving mechanism; the ball screw passes through the thrust ball bearing, the fixed block, and the one-way bearing in sequence.

7. The electric outrigger slow-descent structure according to claim 1, characterized in that: The one-way bearing is a one-way ball bearing, a one-way roller bearing, or a one-way needle bearing.

8. The electric outrigger slow-descent structure according to claim 1, characterized in that: The outer tube is threadedly connected to the driving mechanism.

9. The electric outrigger slow-descent structure according to claim 1, characterized in that: It also includes a universal base; the universal base is detachably fixed to an end of the inner tube away from the driving mechanism.

10. The electric outrigger slow-descent structure according to any one of claims 1 to 9, characterized in that: The outer surface of the ball screw is coated with a lubricating oil layer.

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