Three-joint vehicle supporting arm structure of lifting machine

Abstract

The utility model discloses a three-joint vehicle supporting arm structure of a lifting machine, which comprises a mounting arm, an L-shaped connecting arm and a telescopic arm, and one end of the mounting arm is fixedly welded with a mounting support lug connected with a lifting piece; a rotating shaft structure and a locking structure are arranged at the joint of the end part of the mounting arm and the end part of the L-shaped connecting arm; the L-shaped connecting arm and the mounting arm rotate with the rotating shaft structure as the center and are locked through the locking structure. An inserting cavity is formed in one end, far away from the mounting arm, of the L-shaped connecting arm; the end of the telescopic arm is telescopically inserted into the insertion cavity, and the top face of the end, away from the L-shaped connecting arm, of the telescopic arm is in threaded connection with a supporting base plate. The angle adjusting device is reasonable in structural arrangement, the angle adjusting range can be widened, the rotating shaft structure and the locking structure are arranged at the joint of the mounting arm and the L-shaped connecting arm, the angle between the L-shaped connecting arm and the mounting arm can be adjusted according to needs, locking can be conducted through the locking structure, stability and reliability of supporting can be guaranteed, and the angle adjusting device is suitable for popularization and application. The operation is convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of lifts, and in particular relates to a three-joint vehicle supporting arm structure of a lift. Background Art

[0002] With the rapid development of automobiles, the popularity of automobiles has also increased accordingly, so the amount of automobile maintenance has also increased. During automobile maintenance, it is generally necessary to lift the car to a suitable height, and the trailer arm cannot block the position that needs to be repaired, so that maintenance personnel can work under the car chassis. Therefore, the adaptability and product quality of the lift will directly affect the work efficiency and safety of maintenance personnel;

[0003] The rocker arm structure is an important component in the car lift. The rocker arm structure forms an angle relationship with the lifting member and supports the car, so that the car is subjected to the best balanced support force during the lifting process. For example, the Chinese patent publication number is: CN206970134U, and the patent name is: A rocker arm locking device for a lift, used to lock the connection angle between the rocker arm and the lifting member, including a gear, an anti-rotation block and a locking rod, the gear is arranged at the end of the rocker arm, one end of the locking rod passes through the lifting member and the other end is fixed with the anti-rotation block, one side of the anti-rotation block is provided with an anti-rotation tooth and the anti-rotation tooth is matched and connected with the gear tooth.

[0004] Although it can meet the general use needs, it is generally a straight-shaped structure composed of two sections. Although it can meet the general use needs, not only is the adjustment angle range limited, but it is also composed of two sections, and the telescopic length is also limited. Therefore, to a certain extent, it will also affect its support stability and reliability, and its applicability and practicality are limited. Utility Model Content

[0005] The utility model aims to provide a three-joint vehicle supporting arm structure of a lift which has a reasonable structural arrangement and is conducive to improving the adjustment range.

[0006] The technical solution to achieve the purpose of the utility model is a three-joint support arm structure of a lift, comprising a mounting arm, an L-shaped connecting arm and a telescopic arm, wherein one end of the mounting arm is welded and fixed with a mounting lug connected to a lifting member;

[0007] A rotating shaft structure and a locking structure are provided at the connection between the end of the mounting arm and the end of the L-shaped connecting arm;

[0008] The L-shaped connecting arm and the mounting arm rotate around the rotating shaft structure and are locked by the locking structure;

[0009] An inserting cavity is provided at one end of the L-shaped connecting arm away from the mounting arm;

[0010] The end of the telescopic arm can be telescopically inserted into the insertion cavity, and the top surface of the end of the telescopic arm away from the L-shaped connecting arm is threadedly connected with a supporting pad.

[0011] It is further preferred that: the rotating shaft structure includes a shaft rod, a lower fastening gasket, and a large-diameter gear;

[0012] The end of the mounting arm is provided with a parallel vertical shaft hole and a vertical locking screw hole, and the top of the mounting arm is provided with an n-shaped limiting plate, and the n-shaped limiting plate is located directly above the vertical locking screw hole;

[0013] One end of the L-shaped connecting arm is provided with two parallel connecting ears, and the connecting ears are provided with vertical through holes;

[0014] The two connecting ears of the L-shaped connecting arm are respectively attached to the top surface and the bottom surface of the mounting arm;

[0015] The large diameter gear is fixed on the top end of the shaft rod, the bottom end of the shaft rod passes through the vertical shaft hole and the vertical through hole, and the bottom end of the shaft rod is fixed by a lower fastening gasket.

[0016] It is further preferred that: the locking structure comprises a pull rod shaft, an internally threaded five-star handle, a compression spring and a small diameter gear;

[0017] The internally threaded five-star handle is fixed on the top of the pull rod shaft;

[0018] The bottom end of the pull rod shaft passes through the n-shaped limit plate and is threadedly connected with the vertical locking screw hole;

[0019] The small diameter gear is located in the recessed area of ​​the n-shaped limiting plate and the pull rod shaft is passed through the small diameter gear;

[0020] The compression spring is located on the top surface of the small diameter gear and the mounting arm, and the pull rod shaft is passed through the compression spring;

[0021] The small diameter gear moves upward and disengages from the large diameter gear under the action of the compression spring;

[0022] The pull rod shaft is tightened downward and compresses the compression spring, and at this time the small diameter gear is meshed with the large diameter gear to limit the large diameter gear.

[0023] It is further preferred that the height of the recessed area of ​​the n-shaped limiting plate is 2-3 times the thickness of the large-diameter gear.

[0024] It is further preferred that: the pressing surface of the small diameter gear is an arcuate surface, and the tooth protrusions of the small diameter gear are located on the arcuate surface.

[0025] It is further preferred that: the cross-sectional size of the telescopic arm matches the cross-sectional size of the insertion cavity.

[0026] Further preferably, the large diameter gear is fixed to the top surface of the L-shaped connecting arm by screws.

[0027] The utility model has positive effects: the structure of the utility model is reasonably set up, and the combination of the mounting arm, the L-shaped connecting arm and the telescopic arm can increase the range of angle adjustment, and a rotating shaft structure and a locking structure are provided at the connection between the mounting arm and the L-shaped connecting arm. The angle between the L-shaped connecting arm and the mounting arm can be adjusted as needed, and can be locked by the locking structure, which can ensure the stability and reliability of the support, is easy to operate, has strong applicability and good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to make the content of the utility model easier to understand, the utility model is further described in detail below according to specific embodiments and in conjunction with the accompanying drawings, wherein:

[0029] Figure 1 It is a structural schematic diagram of the utility model;

[0030] Figure 2 This is a schematic diagram of the split structure of the utility model;

[0031] Figure 3 This is another perspective structural diagram of the utility model.

[0032] Figure numerals: mounting arm 1, L-shaped connecting arm 2, telescopic arm 3, mounting ear 4, rotating shaft structure 5, shaft 51, lower fastening gasket 52, large diameter gear 53, locking structure 6, pull rod shaft 61, internal threaded five-star handle 62, compression spring 63, small diameter gear 64, insertion cavity 7, vertical shaft hole 8, vertical locking screw hole 9, N-shaped limiting plate 10, connecting ear 11, vertical through hole 12, support pad 13. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] Example

[0035] See Figures 1 to 3As shown, a three-joint vehicle support arm structure of a lift comprises a mounting arm 1, an L-shaped connecting arm 2 and a telescopic arm 3, one end of the mounting arm is welded and fixed with a mounting ear 4 connected to the lifting member; in this embodiment, the mounting arm is used to connect the L-shaped connecting arm to the lifting member, and the mounting ear is fixed to the lifting member by a screw, so that the entire structure can be lifted and lowered together with the lifting member, and a three-section setting is adopted, and an L-shaped connecting arm is provided, which can not only increase the range of angle adjustment, but also can be telescopically adjusted as needed to meet the use requirements of different cars.

[0036] In actual application, the end of the mounting arm and the end of the L-shaped connecting arm are connected at the end with a rotating shaft structure 5 and a locking structure 6; during operation, the L-shaped connecting arm and the mounting arm rotate around the rotating shaft structure and are locked by the locking structure; in order to facilitate telescopic adjustment, the end of the L-shaped connecting arm away from the mounting arm is provided with an insertion cavity 7; the cross-sectional size of the telescopic arm matches the cross-sectional size of the insertion cavity. During installation, the end of the telescopic arm can be telescopically inserted into the insertion cavity, and the top surface of the end of the telescopic arm away from the L-shaped connecting arm is threadedly connected with a support pad 13. The support pad is mainly used to support the bottom beam of the car to protect the bottom beam of the car, and it can also increase the support area and improve the stability and reliability of the support.

[0037] In this embodiment, the rotating shaft structure 5 includes a shaft 51, a lower fastening gasket 52, and a large diameter gear 53; and in actual application, the end of the mounting arm is provided with a parallel vertical shaft hole 8 and a vertical locking screw hole 9, and the top of the mounting arm is provided with an n-shaped limit plate 10, and the n-shaped limit plate is located directly above the vertical locking screw hole; in this embodiment, the height of the recessed area of ​​the n-shaped limit plate is 2-3 times the thickness of the large diameter gear, so that the small diameter gear has a certain moving space. The large diameter gear is fixed to the top surface of the L-shaped connecting arm by screws. One end of the L-shaped connecting arm is provided with two parallel connecting ears 11, and a vertical through hole 12 is provided on the connecting ear; when installing, the two connecting ears of the L-shaped connecting arm are respectively attached to the top surface and the bottom surface of the mounting arm; the large diameter gear is fixed to the top of the shaft rod. In actual application, the large diameter gear can be fixed by screws or directly formed in one piece, and can be processed and manufactured as needed. The bottom end of the shaft rod passes through the vertical shaft hole and the vertical through hole, and the bottom end of the shaft rod is fixed by the lower fastening gasket. The large diameter gear is used to resist through the tooth groove when rotating the angle, so as to ensure the stability and reliability after the angle adjustment, and also improve the convenience of the angle adjustment operation.

[0038] Moreover, in this embodiment, the locking structure 6 includes a pull rod shaft 61, an internally threaded five-star handle 62, a compression spring 63 and a small diameter gear 64; wherein the pull rod shaft is a conventional structure of the prior art, which is simply applied and therefore not described in detail. During installation, the internally threaded five-star handle is fixed to the top of the pull rod shaft; the bottom end of the pull rod shaft passes through the n-shaped limiting plate and is threadedly connected to the vertical locking screw hole; the rotation operation of the pull rod shaft can be achieved through the internally threaded five-star handle; and the small diameter gear is in the recessed area of ​​the n-shaped limiting plate and the pull rod shaft is penetrated on the small diameter gear; the compression spring is on the top surface of the small diameter gear and the mounting arm, and the pull rod shaft is penetrated on the compression spring; during use, the small diameter gear moves upward under the action of the compression spring to disengage from the large diameter gear; the pull rod shaft is tightened downward and compresses the compression spring, at which time the small diameter gear is engaged with the large diameter gear to limit the large diameter gear. At the same time, in order to increase the meshing area, the pressing surface of the small diameter gear is an arc surface, and the tooth protrusion of the small diameter gear is located on the arc surface.

[0039] The utility model has positive effects: the structure of the utility model is reasonably set up, and the combination of the mounting arm, the L-shaped connecting arm and the telescopic arm can increase the range of angle adjustment, and a rotating shaft structure and a locking structure are provided at the connection between the mounting arm and the L-shaped connecting arm. The angle between the L-shaped connecting arm and the mounting arm can be adjusted as needed, and can be locked by the locking structure, which can ensure the stability and reliability of the support, is easy to operate, has strong applicability and good practicality.

[0040] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural components recorded in the specification can also be directly processed according to existing technical common sense. At the same time, the connection method of each component adopts the mature conventional means in the prior art, and the machinery, parts and equipment all adopt the conventional models in the prior art, so no specific description will be given here.

[0041] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, these obvious changes or modifications derived from the essential spirit of the present invention still belong to the protection scope of the present invention.

Claims

1. A three-joint support arm structure of a lift, comprising a mounting arm, an L-shaped connecting arm and a telescopic arm, characterized in that: A mounting lug connected to the lifting member is welded and fixed to one end of the mounting arm; A rotating shaft structure and a locking structure are provided at the connection between the end of the mounting arm and the end of the L-shaped connecting arm; The L-shaped connecting arm and the mounting arm rotate around the rotating shaft structure and are locked by the locking structure; An inserting cavity is provided at one end of the L-shaped connecting arm away from the mounting arm; The end of the telescopic arm can be telescopically inserted into the insertion cavity, and the top surface of the end of the telescopic arm away from the L-shaped connecting arm is threadedly connected with a supporting pad.

2. The three-joint support arm structure of a lift according to claim 1, characterized in that: The rotating shaft structure includes a shaft rod, a lower fastening gasket, and a large-diameter gear; The end of the mounting arm is provided with a parallel vertical shaft hole and a vertical locking screw hole, and the top of the mounting arm is provided with an n-shaped limiting plate, and the n-shaped limiting plate is located directly above the vertical locking screw hole; One end of the L-shaped connecting arm is provided with two parallel connecting ears, and the connecting ears are provided with vertical through holes; The two connecting ears of the L-shaped connecting arm are respectively attached to the top surface and the bottom surface of the mounting arm; The large diameter gear is fixed on the top end of the shaft rod, the bottom end of the shaft rod passes through the vertical shaft hole and the vertical through hole, and the bottom end of the shaft rod is fixed by a lower fastening gasket.

3. The three-joint support arm structure of a lift according to claim 2, characterized in that: The locking structure includes a pull rod shaft, an internally threaded five-star handle, a compression spring and a small-diameter gear; The internally threaded five-star handle is fixed on the top of the pull rod shaft; The bottom end of the pull rod shaft passes through the n-shaped limit plate and is threadedly connected with the vertical locking screw hole; The small diameter gear is located in the recessed area of ​​the n-shaped limiting plate and the pull rod shaft is passed through the small diameter gear; The compression spring is located on the top surface of the small diameter gear and the mounting arm, and the pull rod shaft is passed through the compression spring; The small diameter gear moves upward and disengages from the large diameter gear under the action of the compression spring; The pull rod shaft is tightened downward and compresses the compression spring, and at this time the small diameter gear is meshed with the large diameter gear to limit the large diameter gear.

4. The three-joint support arm structure of a lift according to claim 3, characterized in that: The height of the recessed area of ​​the n-shaped limiting plate is 2-3 times the thickness of the large-diameter gear.

5. The three-joint support arm structure of a lift according to claim 4, characterized in that: The pressing surface of the small diameter gear is an arc surface, and the tooth protrusion of the small diameter gear is located on the arc surface.

6. The three-joint support arm structure of a lift according to claim 1, characterized in that: The cross-sectional size of the telescopic arm matches the cross-sectional size of the insertion cavity.

7. The three-joint support arm structure of a lift according to claim 2, characterized in that: The large diameter gear is fixed to the top surface of the L-shaped connecting arm by screws.

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