A locking structure for a lift

Abstract

The present invention provides a locking structure for a lift, comprising: a locking block, a locking plate, and a driving rod; the locking block is rotatably arranged on a pulley, the locking plate and the driving rod are both arranged along the movement direction of the pulley, the locking plate is provided with a locking hole, the end of the locking block extends into the locking hole, and the driving rod is used to push the locking block so that the end of the locking block leaves the locking hole. The locking structure for a lift disclosed by the present invention has an end of a clamping block extending into the locking hole, so that the pulley is stuck and does not slide down, and the weight of the pulley falls on the locking plate through the locking block. When lifting, there is no need for the driving structure to be stressed, thereby increasing the life of the driving structure such as the hydraulic cylinder. When the hydraulic cylinder fails, the end of the clamping block extends into the locking hole, so that the pulley will not fall, thereby ensuring safety.

Description

Technical Field

[0001] The present invention relates to the field of lifts, and in particular to a locking structure for lifts. Background Art

[0002] During operation, a car lift needs to be raised to a higher position to facilitate chassis inspection and maintenance. The lift consists of a trolley, which is driven upward by a power unit, such as a hydraulic cylinder. This in turn drives the car upward, completing the lift.

[0003] However, after the pulley lifts the car, if the weight of the car is always borne by the hydraulic cylinder, the service life of the hydraulic cylinder will be greatly shortened, and once the hydraulic cylinder fails, there is a risk of the pulley falling. Summary of the Invention

[0004] The present invention provides a locking structure for a lift to overcome the problem.

[0005] A locking structure for a lift, comprising: a locking block, a locking plate, and a driving rod;

[0006] The locking block is rotatably arranged on the pulley, the locking plate and the driving rod are both arranged along the movement direction of the pulley, the locking plate is provided with a locking hole, the end of the locking block extends into the locking hole, and the driving rod is used to push the locking block so that the end of the locking block leaves the locking hole.

[0007] Furthermore, it also includes a driving plate and a handle;

[0008] The driving plate is provided on the driving rod and has a driving inclined surface;

[0009] The handle can rotate around the mounting axis, one end of the handle abuts against the driving plate, and the other end is provided with a grip;

[0010] When the handle rotates around the mounting shaft, the end of the handle abutting against the driving plate moves along the driving inclined surface, causing the driving rod to move in a direction away from the handle.

[0011] Furthermore, the driving plate is elastic, one end of the driving plate is fixed to the driving rod, and the other end is a free end. The driving rod has a hollow portion, and the projection of the free end of the driving plate on the driving rod falls within the range of the hollow portion.

[0012] Furthermore, it also includes a mounting rod, which includes a first rod portion, a second rod portion and a connecting portion, the connecting portion is arranged between the first rod portion and the second rod portion, the first rod portion is rotatably connected to the driving rod, and the second rod portion is rotatably connected to the mounting block.

[0013] Furthermore, the locking block is mounted on the pulley via a rotating shaft, and a perpendicular line from the center of gravity of the locking block to the axis of the rotating shaft is a line of action of gravity;

[0014] When the gravity direction of the locking block is the same as the direction of the gravity action line, the distance from the gravity action line to the end portion is greater than the distance from the gravity action line to the locking hole.

[0015] Furthermore, a locking rod is provided on the locking block, one end of the locking rod is fixed on the locking block, and the other end is a free end, and the driving rod abuts against the locking rod.

[0016] The present invention discloses a locking structure for a lift, in which the end of a clamping block extends into a locking hole, so that the pulley is stuck and does not slide down. Moreover, the weight of the pulley falls on the locking plate through the locking block. When lifting, there is no need for a driving structure to be subjected to force, thereby increasing the service life of driving structures such as the hydraulic cylinder. When the hydraulic cylinder fails, the end of the clamping block extends into the locking hole, so the pulley will not fall, thereby ensuring safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the 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 labor.

[0018] Figure 1 A schematic diagram of a locking structure for a lift disclosed in an embodiment of the present invention;

[0019] Figure 2 for Figure 1 Enlarged view of part A;

[0020] Figure 3 for Figure 1 Enlarged view of part B;

[0021] Figure 4 for Figure 1 Enlarged view of part C;

[0022] Figure 5 A schematic diagram of the locking block structure disclosed in an embodiment of the present invention;

[0023] Figure 6 A front view of the locking block disclosed in an embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of the working state of the locking structure disclosed in an embodiment of the present invention in the pulley lifting state;

[0025] Figure 8 This is a schematic diagram of the operation of the locking structure disclosed in an embodiment of the present invention when the pulley is not lifted;

[0026] Figure 9 The present invention is a schematic diagram of the installation and use of a locking structure for a lift disclosed in an embodiment of the present invention.

[0027] In the picture:

[0028] 1. Locking block; 11. End; 12. Rotating shaft; 2. Locking plate; 21. Locking hole; 3. Drive rod; 31. Hollow part; 4. Pulley; 5. Drive plate; 51. Drive ramp; 6. Handle; 61. Mounting shaft; 62. Handle; 7. Mounting rod; 8. Mounting block; 9. Line of action of gravity; 10. Locking rod. DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0030] like Figure 1-4 As shown, a locking structure for a lift includes: a locking block 1, a locking plate 2 and a driving rod 3;

[0031] The locking block 1 is rotatably arranged on the pulley 4, and the locking plate 2 and the driving rod 3 are both arranged along the movement direction of the pulley 4. The locking plate 2 is provided with a locking hole 21, and the end 11 of the locking block 1 extends into the locking hole 21. The driving rod 3 is used to push the locking block 1 so that the end of the locking block 1 leaves the locking hole 21.

[0032] The present invention discloses a locking structure for a lift, in which the end of a clamping block extends into a locking hole, so that the pulley is stuck and does not slide down. Moreover, the weight of the pulley falls on the locking plate through the locking block. When lifting, there is no need for a driving structure to be subjected to force, thereby increasing the service life of driving structures such as the hydraulic cylinder. When the hydraulic cylinder fails, the end of the clamping block extends into the locking hole, so the pulley will not fall, thereby ensuring safety.

[0033] The locking block can use the elastic force of an elastic member such as a spring to make the end of the locking block 1 always have a tendency to move toward the locking plate. It can also be achieved through other designs. For example, in this embodiment, by designing the shape of the locking block 1, the locking block 1 can automatically extend into the locking hole 41 of the locking plate 4 under the action of gravity.

[0034] like Figure 9As shown, the lift includes two columns. For clarity, one side of the column is hidden in the figure. The drive rod 3, pulley 4, and locking plate 2 are all mounted on the columns. The pulley 4 can move up and down along the column. When the hydraulic cylinder drives the pulley upward, the locking block moves upward with the pulley. Each time it passes a locking hole 21, the end of the locking block 1 extends into the locking hole 21. As the pulley continues to move upward, the upper edge of the contact portion between the locking block 1 and the locking hole 21 forms a bevel. When the locking block 1 moves upward, the bevel contacts the edge of the locking hole 21, causing the locking block 1 to rotate, thereby causing the end of the locking block 1 to leave the locking hole. When the pulley rises to the appropriate height and the hydraulic cylinder is no longer lifting the pulley, the lower edge of the contact portion between the end of the locking block 1 and the locking hole 21 forms a horizontal edge. Therefore, the locking block 1 will be stuck in the locking hole 21, preventing the pulley from falling.

[0035] like Figure 5 As shown, in this embodiment, the locking block 1 is provided with a locking rod 10, one end of which is fixed to the locking block 1 and the other end is free, and the driving rod 3 abuts against the locking rod 10. The driving rod 3 pushes the locking rod 10 to make the locking block 1 leave the locking hole 21.

[0036] In order to facilitate operation, this embodiment is provided with a driving plate 5 and a handle 6; the driving plate 5 is provided on the driving rod 3 and has a driving inclined surface 51; the handle 6 can rotate around the mounting shaft 61, one end of the handle 6 abuts against the driving plate 6, and the other end is provided with a grip 62;

[0037] When the handle 6 rotates around the mounting shaft 61 , the end of the handle 6 that abuts against the driving plate 5 moves along the driving inclined surface 51 , causing the driving rod 3 to move away from the handle 6 .

[0038] like Figure 7 As shown, when the pulley needs to fall, the handle 6 is rotated through the handle 62, so that the other end of the handle 6 moves upward and slides along the driving inclined surface 51. The driving member 5 drives the driving rod 3 to move away from the handle. The driving rod 3 pushes the locking rod 10, and then pushes the locking block 1 out of the locking hole 21. At this time, the pulley can fall slowly and uniformly under the action of the hydraulic cylinder.

[0039] Before the trolley is lowered, the entire weight of the trolley is pressed against the locking plate 2 by the locking block 1. Therefore, directly pulling the handle 6 will not release the locking block 1. The trolley must be slightly raised by the hydraulic cylinder before moving the handle 6. However, due to negligence, people may forget to lift the trolley first and directly pull the handle 6, which may cause damage to the device.

[0040] In order to prevent damage to the device caused by directly pulling the handle 6, the driving plate 5 in this embodiment is elastic, one end of the driving plate 5 is fixed on the driving rod 3, and the other end is a free end. The driving rod 3 has a hollow portion 31, and the projection of the free end of the driving plate 5 on the driving rod 3 falls within the range of the hollow portion 31.

[0041] like Figure 8 As shown, when the locking block cannot be pushed out, that is, the drive rod 3 cannot move, the end of the drive plate 5 fixed to the drive rod 3 cannot be pushed. Even if one end of the handle 6 slides to the drive slope 51, the fixed end of the drive plate 5 will not move. Because the drive plate 5 is elastic, the drive slope 51 elastically deforms, bending away from the handle 6, and the free end bends accordingly and extends into the hollow portion.

[0042] This structure allows the handle 6 to rotate even when the locking block 1 cannot be pushed out, converting its movement into the elastic potential energy of the drive plate 5, thus preventing damage to the components. Simultaneously, when the hydraulic cylinder drives the pulley to rise slightly, the elastic potential energy of the drive plate 5 is released, pushing the locking block 1 again, causing it to leave the locking hole 21.

[0043] In this embodiment, the driving rod 3 is installed on the column through the mounting rod 7. The mounting rod 7 includes a first rod portion 71, a second rod portion 72 and a connecting portion 73. The connecting portion 73 is arranged between the first rod portion 71 and the second rod portion 72. The first rod portion 71 is rotatably connected to the driving rod 3, and the second rod portion 72 is rotatably connected to the mounting block 8. The mounting block 8 is fixed on the column.

[0044] When the driving rod 3 is pushed, the first rod portion 71 rotates around the second rod portion 72 , and the axial direction of the rotation of the first rod portion 71 is the same as the axial direction of the rotation of the locking block 1 .

[0045] like Figure 6 As shown, in this embodiment, the locking block 1 is mounted on the pulley 4 via the rotating shaft 12, and the perpendicular line from the center of gravity of the locking block 1 to the axis of the rotating shaft 12 is the gravity line 9;

[0046] When the gravity direction of the locking block 1 is the same as the direction of the gravity action line 9 , the distance from the gravity action line 9 to the end 11 is greater than the distance from the gravity action line 9 to the locking hole 21 .

[0047] The locking block 1 is installed on the pulley 4. When it is only supported by gravity and the rotating shaft 12, the locking block 1 naturally droops. The gravity line 9 passes through the center of the locking block 1 and is perpendicular to the ground. The distance between the end of the locking block and the gravity line 9 is b, and the distance between the locking hole 21 and the gravity line 9 is a. b>a, that is, when the locking block 1 is in a naturally drooping state, the end automatically extends into the locking hole 2; when the end of the locking block 1 is pushed out of the locking hole 21, the gravity of the locking block 1 itself will cause the locking block to have a tendency to rotate toward the locking plate. Once the end of the locking block 1 moves to the locking hole 21 and the locking block 1 is no longer subjected to thrust, the end of the locking block 1 automatically extends into the locking hole 21.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A locking structure for a lift, characterized in that: include: A locking block (1), a locking plate (2), a driving rod (3), a driving plate (5) and a handle (6); the locking block (1) is rotatably arranged on the pulley (4); the locking plate (2) and the driving rod (3) are both arranged along the movement direction of the pulley (4); the locking plate (2) is provided with a locking hole (21); the end (11) of the locking block (1) extends into the locking hole (21); the driving rod (3) is used to push the locking block (1) so that the end of the locking block (1) leaves the locking hole (21); The driving plate (5) is arranged on the driving rod (3) and has a driving inclined surface (51); the handle (6) can rotate around the mounting shaft (61), one end of the handle (6) abuts against the driving plate (5), and the other end is provided with a grip (62); when the handle (6) rotates around the mounting shaft (61), the end of the handle (6) abutting against the driving plate (5) moves along the driving inclined surface (51), so that the driving rod (3) moves in a direction away from the handle (6); The driving plate (5) is elastic, one end of the driving plate (5) is fixed to the driving rod (3), and the other end is a free end. The driving rod (3) has a hollow portion (31), and the projection of the free end of the driving plate (5) on the driving rod (3) falls within the range of the hollow portion (31).

2. The locking structure for a lift according to claim 1, characterized in that: The invention also includes a mounting rod (7), wherein the mounting rod (7) includes a first rod portion (71), a second rod portion (72) and a connecting portion (73), wherein the connecting portion (73) is arranged between the first rod portion (71) and the second rod portion (72), wherein the first rod portion (71) is rotatably connected to the driving rod (3), and the second rod portion (72) is rotatably connected to the mounting block (8).

3. The locking structure for a lift according to claim 1, characterized in that: The locking block (1) is mounted on the pulley (4) via a rotating shaft (12), and a perpendicular line from the center of gravity of the locking block (1) to the axis of the rotating shaft (12) is a gravity line (9); when the gravity direction of the locking block (1) is the same as the direction of the gravity line (9), the distance from the gravity line (9) to the end (11) is greater than the distance from the gravity line (9) to the locking hole (21).

4. The locking structure for a lift according to claim 1, characterized in that: The locking block (1) is provided with a locking rod (10), one end of the locking rod (10) is fixed to the locking block (1), and the other end is a free end, and the driving rod (3) abuts against the locking rod (10).

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