Jacking mechanism with self-locking function

Abstract

The jacking mechanism with the self-locking function relates to the technical field of jacking gears and comprises a shell with an opening in the left side, a lead screw is rotationally installed in the shell through a bearing, the right end of the lead screw rightwards penetrates through the shell, a hand wheel is fixedly arranged at the extending end of the lead screw, the lead screw is in threaded connection with a sliding block, and the sliding block is in threaded connection with the right end of the lead screw. Link mechanisms are respectively arranged on the upper and lower sides of the slide block; the connecting rod mechanism located on the upper side comprises a first connecting plate hinged to the top of the sliding block through a first pin shaft, a bent plate is hinged to the other end of the first connecting plate, the middle of the bent plate is hinged to the opening of the shell through a second pin shaft, and a second connecting plate parallel to the bent plate is arranged under the left half portion of the bent plate. And a third connecting plate is hinged between the left end part of the second connecting plate and the left end part of the bending plate. The gear jacking device has the advantages that the structure is compact, the working intensity of workers is relieved, and the gear jacking efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting gears, in particular to a lifting mechanism with a self-locking function. Background Art

[0002] The structure of the gear transmission mechanism used in a workshop is as follows Figure 1 As shown, it includes a support platform 1, a main shaft 2 rotatably mounted on the top of the support platform 1, and a gear 3 is mounted on the main shaft 2. Due to the change of the transmission mechanism, workers need to adjust the height of the gear 3 regularly. At present, in the workshop, multiple workers raise the gear 3 by hand. Although this can increase the height of the gear 3, the weight of the gear 3 is as high as 100Kg, which makes it time-consuming and laborious for workers to raise the gear 3 to the specified height, which not only increases the work intensity of the workers, but also reduces the lifting efficiency of the gear 3.

[0003] In order to solve this technical problem, the workers proposed to use a jack to raise the height of gear 3. However, the vertical distance between the bottom surface of gear 3 and the top surface of support platform 1 is only 5 to 10 cm. Due to the small height, the jack cannot be placed on the top surface of support platform 1. Therefore, the solution of using a jack to raise gear 3 is difficult to implement.

[0004] In order to solve the above technical problems, a lifting mechanism is urgently needed to reduce the work intensity of workers and improve the gear lifting efficiency. Utility Model Content

[0005] The utility model aims to overcome the shortcomings of the prior art and provide a lifting mechanism with a self-locking function which has a compact structure, reduces the work intensity of workers and improves the gear lifting efficiency.

[0006] The purpose of the utility model is achieved through the following technical solutions: a lifting mechanism with a self-locking function, which includes a shell with an opening on the left side, a screw rod is rotatably installed in the shell through a bearing, the right end of the screw rod penetrates the shell to the right, and a hand wheel is fixed on the extended end, a slider is threadedly connected to the screw rod, and a connecting rod mechanism is respectively arranged on the upper and lower sides of the slider;

[0007] The connecting rod mechanism located on the upper side includes a first connecting plate hinged to the top of the slider via a first pin shaft, a bending plate is hinged to the other end of the first connecting plate, the middle part of the bending plate is hinged to the opening of the shell via a second pin shaft, a second connecting plate parallel to the bending plate is arranged directly below the left half of the bending plate, the right end of the second connecting plate is hinged to the opening of the shell via a third pin shaft, a third connecting plate is hinged between the left end of the second connecting plate and the left end of the bending plate, a horizontally arranged supporting connecting piece is fixed to the bottom of the third connecting plate, and an inclined surface is provided at the bottom of the connection between the supporting connecting piece and the third connecting plate;

[0008] A transmission shaft is connected to the screw rod along its axial direction, the right end of the transmission shaft extends to the right outside the hand wheel, and a handle is fixed on the extended end, the left end of the transmission shaft passes through the left end of the screw rod, and a threaded rod is fixed on the extended end, a movable block is threadedly connected to the threaded rod, the movable block is arranged between the two third connecting plates of the two connecting rod mechanisms, the top and bottom of the movable block are provided with wedge surfaces, and the two wedge surfaces are respectively in contact with the inclined surfaces of the two connecting rod mechanisms.

[0009] Two bearing seats are fixedly arranged in the shell, and bearings are fixedly arranged at the left and right ends of the screw rod, and the two bearings are respectively installed in the two bearing seats.

[0010] The outer diameter of the hand wheel is greater than the outer diameter of the handle.

[0011] The two connecting rod mechanisms are arranged symmetrically up and down about the lead screw.

[0012] The transmission shaft is coaxially arranged with the lead screw.

[0013] A threaded hole is provided in the slider, and the slider is threadedly connected to the screw rod through the threaded hole.

[0014] The utility model has the following advantages: compact structure, reduced work intensity of workers and improved gear lifting efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the gear transmission mechanism used in a workshop;

[0016] Figure 2 It is a schematic diagram of the structure of the utility model;

[0017] Figure 3 It is a schematic diagram of the structure in 2 without the shell;

[0018] Figure 4 for Figure 3 The main view;

[0019] Figure 5 It is a structural schematic diagram of the slider;

[0020] Figure 6 It is a structural diagram of the activity block;

[0021] Figure 7 It is a schematic diagram of the structure of the transmission shaft;

[0022] Figure 8 A schematic diagram of the connection between the supporting connecting member and the third connecting plate;

[0023] Fig. 9 It is a working schematic diagram of the utility model;

[0024] In the figure, 1-support table, 2-spindle, 3-gear, 4-housing, 5-bearing, 6-screw, 7-handwheel, 8-slider, 9-connecting rod mechanism, 10-first pin, 11-first connecting plate, 12-bending plate, 13-second pin, 14-second connecting plate, 15-third pin, 16-third connecting plate, 17-support connecting member, 18-inclined surface;

[0025] 19- transmission shaft, 20- handle, 21- threaded rod, 22- movable block, 23- wedge surface. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings, and the protection scope of the utility model is not limited to the following:

[0027] like Figure 2 to Figure 8 As shown, a lifting mechanism with a self-locking function includes a shell 4 with an opening on the left side, a screw rod 6 is rotatably installed in the shell 4 via a bearing 5, the right end of the screw rod 6 passes through the shell 4 to the right, and a hand wheel 7 is fixed on the extended end, a slider 8 is threadedly connected to the screw rod 6, a threaded hole is formed in the slider 8, the slider 8 is threadedly connected to the screw rod 6 via the threaded hole, and connecting rod mechanisms 9 are respectively arranged on the upper and lower sides of the slider 8; the two connecting rod mechanisms 9 are symmetrically arranged about the screw rod 6.

[0028] The connecting rod mechanism 9 located on the upper side includes a first connecting plate 11 hinged to the top of the slider 8 via a first pin shaft 10, a bending plate 12 is hinged to the other end of the first connecting plate 11, the middle part of the bending plate 12 is hinged to the opening of the housing 4 via a second pin shaft 13, a second connecting plate 14 parallel to the bending plate 12 is arranged just below the left half of the bending plate 12, the right end of the second connecting plate 14 is hinged to the opening of the housing 4 via a third pin shaft 15, a third connecting plate 16 is hinged between the left end of the second connecting plate 14 and the left end of the bending plate 12, a horizontally arranged supporting connector 17 is fixed to the bottom of the third connecting plate 16, and an inclined surface 18 is provided at the bottom of the connection between the supporting connector 17 and the third connecting plate 16;

[0029] A transmission shaft 19 is connected to the screw rod 6 along its axial rotation. The transmission shaft 19 is coaxially arranged with the screw rod 6. The right end of the transmission shaft 19 extends to the right outside the hand wheel 7, and a handle 20 is fixed on the extended end. The left end of the transmission shaft 19 passes through the left end of the screw rod 6, and a threaded rod 21 is fixed on the extended end. A movable block 22 is threadedly connected to the threaded rod 21. The movable block 22 is arranged between the two third connecting plates 16 of the two connecting rod mechanisms 9. The top and bottom of the movable block 22 are both provided with wedge-shaped surfaces 23, and the two wedge-shaped surfaces 23 are respectively in contact with the inclined surfaces 18 of the two connecting rod mechanisms 9. The outer diameter of the hand wheel 7 is larger than the outer diameter of the handle 20.

[0030] Two bearing seats are fixedly arranged in the housing 4 , and bearings 5 ​​are fixedly arranged at the left and right ends of the screw rod 6 , and the two bearings 5 ​​are respectively installed in the two bearing seats.

[0031] A method for using a lifting mechanism with a self-locking function, comprising the following steps:

[0032] S1. Worker A lifts the housing 4, and then extends the supporting connecting members 17 of the two connecting rod mechanisms 9 into the area surrounded by the support platform 1 and the gear 3, and then supports the bottom surface of the supporting connecting member 17 of the lower connecting rod mechanism 9 on the top surface of the support platform 1, as shown in FIG. Fig. 9 As shown;

[0033] S2, worker B manually rotates the handwheel 7, the handwheel 7 drives the screw rod 6 to rotate, under the thread cooperation of the screw rod 6 and the slider 8, the slider 8 moves to the left along the length direction of the screw rod 6, the slider 8 drives the first connecting plate 11 on the upper side to move to the left synchronously, the first connecting plate 11 drives the bending plate 12 to rotate upward around the second pin shaft 13, the bending plate 12 drives the third connecting plate 16 to move upward, the third connecting plate 16 drives the supporting connecting member 17 to move upward, the supporting connecting member 17 pushes the gear 3 upward along the main shaft 2 during the upward translation process, when the gear 3 is pushed up to a certain height, the worker B stops rotating the handwheel 7, thereby realizing the lifting of the gear 3;

[0034] S3. When the gear 3 is lifted into place, worker B manually rotates the handle 20, the handle 20 drives the transmission shaft 19 to rotate, and the transmission shaft 19 drives the threaded rod 21 to rotate synchronously. Under the threaded connection between the movable block 22 and the threaded rod 21, the movable block 22 moves to the left along the length direction of the threaded rod 21, so that the upper wedge surface 23 of the movable block 22 contacts the inclined surface 18 of the upper connecting rod mechanism 9, so that the supporting connecting member 17 of the upper connecting rod mechanism 9 is supported by the movable block 22 to prevent the supporting connecting member 17 of the upper connecting rod mechanism 9 from falling downward under the gravity of the gear 3, thereby achieving the purpose of self-locking.

[0035] Among them, from steps S1 to S2, it can be seen that the lifting mechanism only needs two workers to lift the gear 3 weighing up to 100Kg to a high place, without multiple workers manually lifting the gear 3, which not only reduces the work intensity of the workers, but also improves the lifting efficiency of the gear 3. In addition, the lifting mechanism can lift the gear 3 with a distance of only 5 to 10 cm between the gear 3 and the support platform 1, solving the problem that the Qianjin jack cannot lift, and has the characteristics of higher versatility.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A lifting mechanism with a self-locking function, characterized in that: It comprises a shell (4) with an opening on the left side, a screw rod (6) is rotatably mounted in the shell (4) via a bearing (5), the right end of the screw rod (6) passes through the shell (4) to the right, and a hand wheel (7) is fixed on the extended end, a slider (8) is threadedly connected to the screw rod (6), and connecting rod mechanisms (9) are respectively arranged on the upper and lower sides of the slider (8); The connecting rod mechanism (9) located on the upper side comprises a first connecting plate (11) hinged to the top of the slider (8) via a first pin shaft (10), the other end of the first connecting plate (11) is hinged to a bending plate (12), the middle part of the bending plate (12) is hinged to the opening of the shell (4) via a second pin shaft (13), a second connecting plate (14) parallel to the bending plate (12) is arranged directly below the left half of the bending plate (12), the right end of the second connecting plate (14) is hinged to the opening of the shell (4) via a third pin shaft (15), a third connecting plate (16) is hinged between the left end of the second connecting plate (14) and the left end of the bending plate (12), a horizontally arranged supporting connecting member (17) is fixed at the bottom of the third connecting plate (16), and an inclined surface (18) is provided at the bottom of the connection between the supporting connecting member (17) and the third connecting plate (16); A transmission shaft (19) is connected to the screw rod (6) in an axially rotatable manner. The right end of the transmission shaft (19) extends rightward to the outside of the hand wheel (7), and a handle (20) is fixedly provided on the extended end. The left end of the transmission shaft (19) passes through the left end of the screw rod (6), and a threaded rod (21) is fixedly provided on the extended end. A movable block (22) is threadedly connected to the threaded rod (21). The movable block (22) is arranged between two third connecting plates (16) of the two connecting rod mechanisms (9). The top and bottom of the movable block (22) are both provided with wedge-shaped surfaces (23), and the two wedge-shaped surfaces (23) are respectively in contact with the inclined surfaces (18) of the two connecting rod mechanisms (9).

2. A lifting mechanism with a self-locking function according to claim 1, characterized in that: Two bearing seats are fixedly arranged in the housing (4), and bearings (5) are fixedly arranged at the left and right ends of the screw rod (6), and the two bearings (5) are respectively installed in the two bearing seats.

3. A lifting mechanism with a self-locking function according to claim 2, characterized in that: The outer diameter of the hand wheel (7) is greater than the outer diameter of the handle (20).

4. A lifting mechanism with a self-locking function according to claim 3, characterized in that: The two connecting rod mechanisms (9) are arranged symmetrically up and down about the screw rod (6).

5. A lifting mechanism with a self-locking function according to claim 4, characterized in that: The transmission shaft (19) is coaxially arranged with the screw rod (6).

6. A lifting mechanism with a self-locking function according to claim 5, characterized in that: A threaded hole is provided in the slider (8), and the slider (8) is threadedly connected to the screw rod (6) via the threaded hole.

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