Locking device for scissor lift

Abstract

A first locking mechanism comprises a cavity, the cavity is formed in a bottom frame, a first air cylinder is fixedly installed in the cavity, the movable end of the first air cylinder is fixedly connected with a push plate, one side of the push plate is fixedly connected with a bottom plate, and the other side of the push plate is fixedly connected with a second air cylinder. The device comprises a bottom plate, the two sides of the bottom plate are both fixedly connected with plate sliding strips, the two plate sliding strips are both slidably connected into plate sliding grooves, the two plate sliding grooves are both formed in a cavity, the top of the bottom plate is fixedly connected with trapezoidal push blocks, the number of the trapezoidal push blocks is multiple, and the multiple trapezoidal push blocks are all movably connected with supporting assemblies. A clamping assembly is movably connected to the supporting assembly, the scissor lift relates to the technical field of scissor lifters, a push plate is pushed through a first air cylinder to enable a trapezoidal push block on a bottom plate to jack up the clamping assembly, and part of the clamping assembly penetrates through a through hole to clamp a sliding block in sliding so as to prevent the scissor lift from falling.

Description

Technical Field

[0001] The present invention relates to the technical field of scissor lifts, and particularly to a locking device for a scissor lift. Background Art

[0002] A scissor lift is a key device for lifting vehicles in the automotive repair industry and plays a crucial role in automotive repair and maintenance. Whether it is a major overhaul or a minor repair and maintenance of the whole vehicle, a scissor lift is indispensable. When in use, the vehicle is driven to the lift station, and through manual operation, the platform of the scissor lift can be raised to lift the vehicle to a certain height for easy vehicle repair. However, there are great safety hazards during the use of the scissor lift. Once a failure occurs and it falls, the consequences will be unimaginable. Therefore, the present invention provides a locking device for a scissor lift. Summary of the Invention

[0003] The purpose of the present invention is to provide a locking device for a scissor lift to solve the technical problems mentioned in the above background art.

[0004] The purpose of the present invention can be achieved by the following technical solutions:

[0005] A locking device for a scissor lift includes a bottom frame. A first locking mechanism is arranged on the bottom frame, and two first locking mechanisms are symmetrically arranged. An X-frame is rotatably connected to the bottom frame, and a slide rail is fixedly connected to the bottom frame. Both the X-frame and the slide rail are symmetrically arranged in two. Two sliders are slidably connected to the two slide rails respectively, and the two sliders are rotatably connected to the corresponding X-frames respectively. A second locking mechanism is movably connected between the two X-frames.

[0006] The first locking mechanism includes a chamber opened inside the bottom frame. A first cylinder is fixedly installed in the chamber. The movable end of the first cylinder is fixedly connected with a push plate. One side of the push plate is fixedly connected with a bottom plate. Both sides of the bottom plate are fixedly connected with plate slide bars, and the two plate slide bars are slidably connected in plate slide grooves respectively. The two plate slide grooves are both opened in the chamber. The top of the bottom plate is fixedly connected with trapezoidal push blocks. A plurality of trapezoidal push blocks are provided, and a supporting component is movably connected to each of the plurality of trapezoidal push blocks. A clamping component is movably connected to the supporting component.

[0007] As a further scheme of the present invention: The supporting component includes a supporting platform. A ball groove is opened at the bottom of the supporting platform, and a rolling ball is rollably connected in the ball groove. The rolling ball is rollably connected with the trapezoidal push block.

[0008] As a further solution of the present invention: The clamping component includes a support rod, one end of the support rod is fixedly connected to the top of the support platform, a spring is sleeved on the outer surface of the support rod, a rod sleeve is slidably connected to the support rod, a limiting groove is formed inside the rod sleeve, there are four limiting grooves symmetrically arranged at the center of the limiting groove, and limiting blocks are slidably connected in all four limiting grooves, and the four limiting blocks are all fixedly connected to the support rod. The rod sleeve is slidably connected in a through hole, and the through hole is formed through the bottom frame.

[0009] As a further solution of the present invention: The bottom plate is slidably connected to the chamber.

[0010] As a further solution of the present invention: The second locking mechanism includes a base, a first ratchet row is fixedly connected to the top of the base, there are two first ratchet rows symmetrically arranged, a first rod groove is formed in the base, a bottom groove is formed in the first rod groove, a cover plate is fixedly connected to the top of the base, a second rod groove is formed in the bottom of the cover plate, a top groove is formed in the second rod groove, a connecting component is movably connected to the base, and a fixing component is movably connected to the cover plate.

[0011] As a further solution of the present invention: The connecting component includes a first connecting plate and a second connecting plate, the first connecting plate and the second connecting plate are respectively fixedly connected to both ends of the base, both the first connecting plate and the second connecting plate are fixedly connected to the cover plate, a first curved rod is fixedly connected to one side of the first connecting plate, there are two first curved rods symmetrically arranged, a first shaft is rotatably connected between the two first curved rods, and both ends of the first shaft are fixedly connected to the corresponding X frames.

[0012] As a further solution of the present invention: The fixing component includes second curved rods, there are two second curved rods, a second shaft is rotatably connected between the two second curved rods, both ends of the second shaft are fixedly connected to the corresponding X frames, fixing rods are fixedly connected to the bottoms of both second curved rods, second ratchet rows are fixedly connected to the bottoms of the fixing rods, the two second ratchet rows are respectively meshed with the corresponding first ratchet rows, a sleeve is rotatably connected to the second shaft, a sliding rod is fixedly connected to the sleeve, one end of the sliding rod penetrates through the second connecting plate and is slidably connected in the first rod groove and the second rod groove, a fixing block is fixedly connected to the sliding rod, there are two fixing blocks symmetrically arranged, the two fixing blocks are respectively slidably connected in the bottom groove and the top groove, and a driving component is movably connected between the two second curved rods.

[0013] As a further solution of the present invention: The driving assembly includes a mounting frame, the mounting frame is slidably connected to the top of the cover plate, a frame slide bar is fixedly connected to the bottom of the mounting frame, two frame slide bars are symmetrically arranged, and the two frame slide bars are respectively slidably connected in corresponding frame slide grooves, and the two frame slide grooves are both opened at the top of the cover plate. A second cylinder is fixedly installed on the top of the mounting frame, the movable end of the second cylinder penetrates through the mounting frame and is rotatably connected to a pressing plate, and the pressing plate is fixedly connected to the second curved rod.

[0014] As a further solution of the present invention: The mounting frame is slidably connected to the second curved rod.

[0015] Beneficial effects

[0016] The present invention provides a locking device for a scissor lift. Compared with the prior art, the following beneficial effects are achieved:

[0017] (1) In this application, the first cylinder is used to push the push plate, so that the trapezoidal push block on the bottom plate jacks up the clamping assembly, and part of the clamping assembly passes through the through hole to block the sliding slider to prevent the scissor lift from falling.

[0018] (2) In this application, the slider blocks part of the clamping assembly located directly below the slider from passing through the corresponding through hole. No matter where the slider is, the scissor lift can be locked at any time. There is no need for a sensor to determine the specific position of the slider to eject the corresponding clamping assembly, and it also avoids the locking failure caused by the sensor failure, improving the safety of the scissor lift.

[0019] (3) In this application, the second cylinder is used to push the pressing plate to drive the second ratchet rows on the two fixing components to engage with the corresponding first ratchet rows, preventing the sliding rod from sliding between the base and the cover plate, so as to lock the scissor lift by braking the moving X-frame. Description of the drawings

[0020] Figure 1 It is the front view of the present invention;

[0021] Figure 2 It is the three-dimensional view of the bottom frame of the present invention;

[0022] Figure 3 It is the partial main sectional view of the present invention;

[0023] Figure 4 It is the present invention Figure 3 The partial enlarged view at A in;

[0024] Figure 5 It is the partial three-dimensional view of the first locking mechanism of the present invention;

[0025] Figure 6 It is the partial exploded view of the first locking mechanism of the present invention;

[0026] Figure 7 Front view of the second locking mechanism of the present invention;

[0027] Figure 8 Stereogram of the second locking mechanism of the present invention;

[0028] Figure 9 Exploded view of the second locking mechanism of the present invention;

[0029] Figure 10 For the present invention Figure 9 Partial enlarged view at position B in the present invention.

[0030] In the figure: 1, bottom frame; 2, first locking mechanism; 21, chamber; 22, first air cylinder; 23, push plate; 24, bottom plate; 25, plate slide; 26, plate slide groove; 27, trapezoidal push block; 28, support assembly; 281, support platform; 282, ball groove; 283, ball; 29, clamping assembly; 291, support rod; 292, spring; 293, rod sleeve; 294, limit groove; 295, limit block; 296, through hole; 3, X frame; 4, slide rail; 5, slider; 6, second locking mechanism; 61, base; 62, first ratchet row; 63, first rod groove; 64, bottom groove; 65, cover plate; 66, second rod groove; 67, top groove; 68, connection assembly; 681, first connecting plate; 682, second connecting plate; 683, first curved rod; 684, first shaft; 69, fixing assembly; 691, second curved rod; 692, second shaft; 693, fixing rod; 694, second ratchet row; 695, sleeve; 696, slide rod; 697, fixing block; 7, driving assembly; 71, mounting frame; 72, frame slide; 73, frame slide groove; 74, second air cylinder; 75, pressing plate. Specific embodiments

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] Please refer to Figures 1-10As shown in the figure, the present invention is a locking device for a scissor lift, including a bottom frame 1, on which a first locking mechanism 2 is provided. There are two first locking mechanisms 2 symmetrically arranged. An X-frame 3 is rotatably connected to the bottom frame 1, and a slide rail 4 is fixedly connected to the bottom frame 1. Both the X-frame 3 and the slide rail 4 are symmetrically arranged in two. Two sliders 5 are slidably connected to the two slide rails 4 respectively, and the two sliders 5 are rotatably connected to the corresponding X-frames 3 respectively. A second locking mechanism 6 is movably connected between the two X-frames 3; the first locking mechanism 2 includes a chamber 21, which is opened inside the bottom frame 1. A first cylinder 22 is fixedly installed in the chamber 21. The movable end of the first cylinder 22 is fixedly connected to a push plate 23. One side of the push plate 23 is fixedly connected to a bottom plate 24. Both sides of the bottom plate 24 are fixedly connected with plate slide bars 25. The two plate slide bars 25 are both slidably connected in plate slide grooves 26, and the two plate slide grooves 26 are both opened in the chamber 21. The top of the bottom plate 24 is fixedly connected with trapezoidal push blocks 27. There are multiple trapezoidal push blocks 27, and a support assembly 28 is movably connected to each of the multiple trapezoidal push blocks 27. A clamping assembly 29 is movably connected to the support assembly 28.

[0033] The support assembly 28 includes a support platform 281. A ball groove 282 is opened at the bottom of the support platform 281. A ball 283 is rotatably connected in the ball groove 282, and the ball 283 is rotatably connected to the trapezoidal push block 27.

[0034] The clamping assembly 29 includes a support rod 291. One end of the support rod 291 is fixedly connected to the top of the support platform 281. A spring 292 is sleeved on the outer surface of the support rod 291. A rod sleeve 293 is slidably connected to the support rod 291. A limiting groove 294 is opened inside the rod sleeve 293. There are four limiting grooves 294 arranged centrosymmetrically. Four limiting blocks 295 are slidably connected in the four limiting grooves 294 respectively, and the four limiting blocks 295 are all fixedly connected to the support rod 291. The rod sleeve 293 is slidably connected in a through hole 296, and the through hole 296 is opened through the bottom frame 1.

[0035] The bottom plate 24 is slidably connected to the chamber 21.

[0036] The input end of the first cylinder 22 is connected to an external power supply. Under normal conditions, the first cylinder 22 is in a contracted state. The clamping assembly 29 is located on the push plate 23. The upper end of the rod sleeve 293 is located in the through hole 296 and does not pass through the through hole 296, so it will not hinder the movement of the slider 5. The lower end of the rod sleeve 293 is located inside the chamber 21. The limiting blocks 295 and the limiting grooves 294 prevent the first locking mechanism 2 from running too fast, causing the rod sleeve 293 to slide out of the surface of the support rod 291 and eject out of the through hole 296, resulting in locking failure.

[0037] When the scissors lift fails, the first cylinder 22 pushes the push plate 23, causing the trapezoidal push block 27 on the bottom plate 24 to lift the clamping component 29. Part of the clamping component 29 passes through the through hole 296 to block the sliding slider 5, preventing the scissors lift from falling. The slider 5 obstructs part of the clamping component 29 located directly below it from passing through the corresponding through hole 296. The scissors lift can be locked at any time regardless of the position of the slider 5, without the need for a sensor to determine the specific position of the slider to eject the corresponding clamping component 29, and it also avoids the locking failure caused by sensor failure, improving the safety of the scissors lift.

[0038] The second locking mechanism 6 includes a base 61. A first ratchet row 62 is fixedly connected to the top of the base 61. There are two first ratchet rows 62 arranged symmetrically. A first rod slot 63 is formed in the base 61, and a bottom slot 64 is formed in the first rod slot 63. A cover plate 65 is fixedly connected to the top of the base 61. A second rod slot 66 is formed in the bottom of the cover plate 65, and a top slot 67 is formed in the second rod slot 66. A connecting component 68 is movably connected to the base 61, and a fixing component 69 is movably connected to the cover plate 65.

[0039] The connecting component 68 includes a first connecting plate 681 and a second connecting plate 682. The first connecting plate 681 and the second connecting plate 682 are respectively fixedly connected to both ends of the base 61. Both the first connecting plate 681 and the second connecting plate 682 are fixedly connected to the cover plate 65. A first curved rod 683 is fixedly connected to one side of the first connecting plate 681. There are two first curved rods 683 arranged symmetrically. A first shaft 684 is rotatably connected between the two first curved rods 683. Both ends of the first shaft 684 are fixedly connected to the corresponding X-frame 3.

[0040] The fixing component 69 includes second curved rods 691. There are two second curved rods 691. A second shaft 692 is rotatably connected between the two second curved rods 691. Both ends of the second shaft 692 are fixedly connected to the corresponding X-frame 3. Fixing rods 693 are fixedly connected to the bottoms of the two second curved rods 691. A second ratchet row 694 is fixedly connected to the bottom of the fixing rod 693. The two second ratchet rows 694 are respectively engaged with the corresponding first ratchet rows 62. A sleeve 695 is rotatably connected to the second shaft 692. A sliding rod 696 is fixedly connected to the sleeve 695. One end of the sliding rod 696 penetrates through the second connecting plate 682 and is slidably connected in the first rod slot 63 and the second rod slot 66. A fixing block 697 is fixedly connected to the sliding rod 696. There are two fixing blocks 697 arranged symmetrically. The two fixing blocks 697 are respectively slidably connected in the bottom slot 64 and the top slot 67. A driving component 7 is movably connected between the two second curved rods 691.

[0041] The driving component 7 includes a mounting frame 71. The mounting frame 71 is slidably connected to the top of the cover plate 65. A frame slide bar 72 is fixedly connected to the bottom of the mounting frame 71. There are two frame slide bars 72 symmetrically arranged. The two frame slide bars 72 are respectively slidably connected in the corresponding frame slide grooves 73. The two frame slide grooves 73 are both opened on the top of the cover plate 65. A second air cylinder 74 is fixedly installed on the top of the mounting frame 71. The movable end of the second air cylinder 74 penetrates through the mounting frame 71 and is rotatably connected to a pressing plate 75. The pressing plate 75 is fixedly connected to the second curved rod 691.

[0042] The mounting frame 71 is slidably connected to the second curved rod 691.

[0043] The input end of the second air cylinder 74 is connected to an external power supply. The first rod groove 63 and the second rod groove 66 are in contact with the surface of the sliding rod 696. Under normal conditions, the second air cylinder 74 is in a contracted state. The two second curved rods 691 drive the two second ratchet rows 694 to separate from the two first ratchet rows 62.

[0044] When the scissor lift is operating, the sliding rod 696 slides between the base 61 and the cover plate 65 to keep the scissor lift operating smoothly. The mounting frame 71 drives the second air cylinder 74 and the two second curved rods 691 to slide on the surface of the cover plate 65. At the same time, the two first curved rods 683 rotate on the surface of the first shaft 684, and the two second curved rods 691 rotate on the surface of the second shaft 692. The width of the pressing plate 75 is smaller than the inner width of the mounting frame 71. Combining the rotational connection between the movable end of the second air cylinder 74 and the pressing plate 75, the rotation of the second curved rod 691 is not hindered by the mounting frame 71.

[0045] When the scissor lift fails, the second air cylinder 74 is used to push the pressing plate 75 to drive the second ratchet rows 694 on the two fixing components 69 to engage with the corresponding first ratchet rows 62, preventing the sliding rod 696 from sliding between the base 61 and the cover plate 65, thereby locking the scissor lift by braking the moving X-frame 3.

[0046] When the scissor lift fails, the first air cylinder 22 and the second air cylinder 74 are instantly started, and the locking process is completed in a very short time. The dual locking mechanism greatly improves the safety of the scissor lift.

[0047] At the same time, the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0048] Working principle of the present invention: Power on the first cylinder 22 and the second cylinder 74. When the scissor lift fails and falls, the first cylinder 22 is instantaneously activated to push the push plate 23, driving the bottom plate 24 and the trapezoidal push block 27 away from the first cylinder 22 and squeezing the clamping assembly 29. The rolling balls 283 of the clamping assembly 29 move along the inclined surface of the trapezoidal push block 27 to the top of the trapezoidal push block 27 under the restriction of the through holes 296, and jack up the support platform 281, the spring 292 and the support rod 291. The spring 292 pushes the rod sleeve 293 to move upward through the through hole 296 to stop the moving slider 5, and the scissor lift is locked accordingly. At the same time, the second cylinder 74 is instantaneously activated to push the pressing plate 75, driving the two second curved rods 691, the fixed rod 693 and the second ratchet row 694 to rotate around the second shaft 692 and approach the base, so that the two second ratchet rows 694 are engaged and clamped with the corresponding first ratchet rows 62, thereby hindering the sliding of the two second curved rods 691 on the surface of the cover plate 65, and further hindering the sliding of the sliding rod 696 between the base 61 and the cover plate 65, and then braking the moving X-frame 3.

[0049] It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0050] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A locking device for a scissor lift, comprising a bottom frame (1), characterized in that: A first locking mechanism (2) is provided on the bottom frame (1). There are two first locking mechanisms (2) arranged symmetrically. An X-shaped frame (3) is rotatably connected to the bottom frame (1). A slide rail (4) is fixedly connected to the bottom frame (1). Both the X-shaped frame (3) and the slide rail (4) are arranged symmetrically in two. Sliders (5) are slidably connected to both slide rails (4). The two sliders (5) are respectively rotatably connected to the corresponding X-shaped frames (3). A second locking mechanism (6) is movably connected between the two X-shaped frames (3). The first locking mechanism (2) includes a chamber (21). The chamber (21) is opened inside the bottom frame (1). A first cylinder (22) is fixedly installed in the chamber (21). The movable end of the first cylinder (22) is fixedly connected to a push plate (23). One side of the push plate (23) is fixedly connected to a bottom plate (24). Plate slide bars (25) are fixedly connected to both sides of the bottom plate (24). Both plate slide bars (25) are slidably connected in plate slide grooves (26). Both plate slide grooves (26) are opened in the chamber (21). A trapezoidal push block (27) is fixedly connected to the top of the bottom plate (24). There are multiple trapezoidal push blocks (27). A support assembly (28) is movably connected to each of the multiple trapezoidal push blocks (27). A clamping assembly (29) is movably connected to the support assembly (28).

2. The locking device for a scissor lift according to claim 1, characterized in that: The support assembly (28) includes a support platform (281). A ball groove (282) is opened at the bottom of the support platform (281). A ball (283) is rotatably connected in the ball groove (282). The ball (283) is rotatably connected to the trapezoidal push block (27).

3. The locking device for a scissor lift according to claim 1, characterized in that: The clamping assembly (29) includes a support rod (291). One end of the support rod (291) is fixedly connected to the top of the support platform (281). A spring (292) is sleeved on the outer surface of the support rod (291). A rod sleeve (293) is slidably connected to the support rod (291). A limiting groove (294) is opened inside the rod sleeve (293). There are four limiting grooves (294) arranged centrosymmetrically. Limiting blocks (295) are slidably connected in all four limiting grooves (294). All four limiting blocks (295) are fixedly connected to the support rod (291). The rod sleeve (293) is slidably connected in a through hole (296). The through hole (296) is penetrated and opened on the bottom frame (1).

4. The locking device for a scissor lift according to claim 1, characterized in that: The bottom plate (24) is slidably connected to the chamber (21).

5. A locking device for a scissor lift according to claim 1, characterized in that: The second locking mechanism (6) includes a base (61). A first ratchet row (62) is fixedly connected to the top of the base (61). There are two first ratchet rows (62) arranged symmetrically. A first rod groove (63) is formed in the base (61), and a bottom groove (64) is formed in the first rod groove (63). A cover plate (65) is fixedly connected to the top of the base (61). A second rod groove (66) is formed in the bottom of the cover plate (65), and a top groove (67) is formed in the second rod groove (66). A connecting component (68) is movably connected to the base (61), and a fixing component (69) is movably connected to the cover plate (65).

6. The locking device for a scissor lift according to claim 5, characterized in that: The connecting component (68) includes a first connecting plate (681) and a second connecting plate (682). The first connecting plate (681) and the second connecting plate (682) are respectively fixedly connected to two ends of the base (61). Both the first connecting plate (681) and the second connecting plate (682) are fixedly connected to the cover plate (65). A first curved rod (683) is fixedly connected to one side of the first connecting plate (681). There are two first curved rods (683) arranged symmetrically. A first shaft (684) is rotatably connected between the two first curved rods (683). Two ends of the first shaft (684) are respectively fixedly connected to the corresponding X frames (3).

7. The locking device for a scissor lift according to claim 5, characterized in that: The fixing component (69) includes second curved rods (691). There are two second curved rods (691). A second shaft (692) is rotatably connected between the two second curved rods (691). Two ends of the second shaft (692) are respectively fixedly connected to the corresponding X frames (3). Fixing rods (693) are fixedly connected to the bottoms of the two second curved rods (691). A second ratchet row (694) is fixedly connected to the bottom of the fixing rod (693). The two second ratchet rows (694) are respectively meshed with the corresponding first ratchet rows (62). A sleeve (695) is rotatably connected to the second shaft (692). A sliding rod (696) is fixedly connected to the sleeve (695). One end of the sliding rod (696) penetrates through the second connecting plate (682) and is slidably connected in the first rod groove (63) and the second rod groove (66). A fixing block (697) is fixedly connected to the sliding rod (696). There are two fixing blocks (697) arranged symmetrically. The two fixing blocks (697) are respectively slidably connected in the bottom groove (64) and the top groove (67). A driving component (7) is movably connected between the two second curved rods (691).

8. A locking device for a scissor lift according to claim 7, characterized in that: The driving component (7) includes a mounting frame (71), the mounting frame (71) is slidably connected to the top of the cover plate (65), a frame sliding bar (72) is fixedly connected to the bottom of the mounting frame (71), two frame sliding bars (72) are symmetrically arranged, and the two frame sliding bars (72) are respectively slidably connected in corresponding frame sliding grooves (73), and the two frame sliding grooves (73) are both opened on the top of the cover plate (65). A second cylinder (74) is fixedly installed on the top of the mounting frame (71), the movable end of the second cylinder (74) penetrates through the mounting frame (71) and is rotatably connected to a pressing plate (75), and a fixed connection is provided between the pressing plate (75) and the second crank (691).

9. A locking device for a scissor lift according to claim 8, characterized in that: A sliding connection is provided between the mounting frame (71) and the second crank (691).

Images