Fixing and locking mechanism for four-column lifting machine

Abstract

The utility model discloses a fixing and locking mechanism for a four-column lifting machine, which comprises a lock tooth (1) fixedly connected on the side wall of a column, a plurality of lock grooves (2) distributed on the lock tooth (1) at intervals along the height direction, a lock plate (3) buckled and connected in any lock groove (2), a lifting frame slidably connected in the middle of the lock plate (3), and a limit plate (4) rotatably connected with the lifting frame and arranged on one side of the lock plate (3) far away from the lock tooth (1). The outer part of the limiting plate (4) is respectively connected with a driving mechanism and a resetting mechanism, and the middle part of the limiting plate (4) is respectively provided with a telescopic assembly and a supporting plate (5); the telescopic assembly comprises a pull rod (6) rotationally connected with the limiting plate (4), and the end of the pull rod (6) extends to the outer side of the limiting plate (4) and is rotationally connected with the locking plate (3). The locking device has the advantages of being good in locking effect and convenient to operate.

Description

Technical Field

[0001] This utility model relates to a lifting machine, and more particularly to a locking mechanism for a four-post lifting machine. Background Technology

[0002] Currently, the locking mechanism used in two-post and four-post lifts, as shown in patent 202210903568.9, includes interlocking locking teeth, locking plates, and limiting plates. The locking teeth are fixedly connected to the side wall of the column and have several locking grooves for engaging and limiting. The locking plates and limiting plates are rotatably connected to the lifting frame, and the limiting plate is externally connected to a drive mechanism. When the lifting frame is in the lifting state, the limiting plate is rotated by the drive mechanism to separate from the locking plate, allowing the locking plate to open with the lifting frame's rotation, thus releasing the limiting effect on the lifting frame. When the lifting frame is in the locked state, the locking plate rotates to engage with any of the locking grooves, while the limiting plate returns to the retracted state and supports the bottom of the limiting plate, preventing the locking plate from rotating and disengaging in this state, thus achieving the locking function.

[0003] However, the aforementioned structure has several drawbacks. First, because the locking plate needs to rotate to disengage from the locking teeth in the unlocked state, space must be left in the locking groove for the locking plate to rotate and disengage. This requires the lifting frame to reach a greater lifting height to return to the locked state, thus reducing the locking effect on the lifting frame. Second, when the lifting frame is raised to a non-locked position, the locking plate is in a rotating and tilted state due to the obstruction of the locking teeth, which interferes with the locking action of the limit plate. In other words, the limit plate cannot return to its retracted state and achieve the locking function in this state. Furthermore, because the locking mechanism is hidden inside the lifting machine's column and cannot be directly observed, operators cannot directly determine whether the lifting frame is in the locked position. Instead, they need to repeatedly raise and lower the lifting frame and test it to reach the locked position, increasing the operational difficulty for operators.

[0004] Therefore, the existing locking mechanisms of lifting machines suffer from poor locking performance and operational difficulties. Utility Model Content

[0005] The purpose of this invention is to provide a locking mechanism for a four-post lift. It features good locking effect and convenient operation.

[0006] The technical solution of this utility model: a locking mechanism for a four-post lift includes locking teeth fixedly connected to the side wall of the column. Several locking grooves are spaced apart along the height direction on the locking teeth. A locking plate is engaged in any of the locking grooves. A lifting frame is slidably connected to the middle of the locking plate. A limiting plate, rotatably connected to the lifting frame, is provided on the side of the locking plate away from the locking teeth. A driving mechanism and a reset mechanism are respectively connected to the outside of the limiting plate. A telescopic component and a support plate are respectively provided in the middle of the limiting plate. The telescopic component includes a pull rod rotatably connected to the limiting plate, the end of which extends to the outside of the limiting plate and rotatably connects to the locking plate.

[0007] The drive mechanism is used to control the limiting plate to open toward the side away from the locking plate;

[0008] The reset mechanism is used to control the retraction of the limiting plate toward the locking plate side;

[0009] The telescopic component is used to control the lateral movement of the limiting plate;

[0010] The support plate is used to support the bottom of the locking plate after the limiting plate has retracted into place.

[0011] In the aforementioned four-post lift locking mechanism, a T-shaped slide rod is slidably connected to the middle of the locking plate. One side of the slide rod is rotatably connected to a pull rod, and the other side of the slide rod is connected to the locking plate via an elastic element. The elastic element is used to apply a compressive force to the locking plate toward the pull rod side.

[0012] In the aforementioned four-post lift locking mechanism, the locking plate includes two first plates arranged side by side, which are connected to each other via a second plate. One side of the slide rod is slidably connected to the second plate. The elastic element is a compression spring sleeved on the outside of the slide rod, with both ends of the compression spring respectively in contact with the slide rod and the second plate.

[0013] The aforementioned four-post lift locking mechanism also includes a guide member for fixing and connecting the lifting frame. There are two guide members, which are located on the upper and lower sides of the locking plate respectively. Several rubber rollers are arranged side by side on the guide members, and the ends of the rubber rollers are in contact with the top or bottom of the first plate.

[0014] In the aforementioned four-post lift locking mechanism, the second plate has a limit switch on the side near the lock groove, and the limit switch is externally connected to the lifting frame.

[0015] In the aforementioned four-post lift locking mechanism, the reset mechanism is a tension spring, with the two ends of the tension spring connected to a limiting plate and a lifting frame, respectively.

[0016] In the aforementioned four-post lift locking mechanism, the drive mechanism includes a first drive wheel rotatably connected to a limit plate, and second drive wheels are provided on the upper and lower sides of the first drive wheel. The first drive wheel and the second drive wheel are offset to each other. Steel wire ropes are connected to the first drive wheel and the second drive wheel. One end of the steel wire rope is connected to the lift column, and the other end of the steel wire rope is connected to a drive component.

[0017] Compared with the prior art, this utility model has the following characteristics:

[0018] (1) Through the structural cooperation of the telescopic component and the locking plate, the limiting plate can be driven to move laterally by the telescopic component during rotation. Therefore, compared with the existing locking mechanism, there is no need to leave space for the locking plate to open, which improves the locking effect of the present invention.

[0019] (2) Through the structural cooperation of the locking plate, the sliding rod and the elastic element, when the limiting plate is rotated to the locked state, the telescopic component can apply a squeezing force towards the locking groove to the sliding rod; at this time, if the locking plate is in the locked position, the sliding rod will be driven by the elastic element to slide the limiting plate to engage with the locking groove after being subjected to force, thus realizing the locking function; if the locking plate is in the non-locked position, the locking plate will be in contact with the inner wall of the toothed plate, and the sliding rod will be in the sliding to the contracted state after being subjected to the squeezing force, and will apply an inward squeezing force to the locking plate, that is, the locking plate can continue to rise and fall to the locked position in the locked state, and after moving to the locked position, it will be squeezed by the elastic element and quickly engage with the locking groove to form a lock; under the above cooperation, the present invention can activate the locking function when the lifting frame is at any height position, and form a lock when the lifting frame moves to the locked position, thus effectively improving the operation convenience and locking effect of the present invention;

[0020] (3) Based on the above, by setting the limit switch, the operator can also judge whether the lifting frame is in a locked state according to the triggering state of the limit switch, which improves the operation convenience and stability of this utility model.

[0021] Therefore, this utility model has the characteristics of good locking effect and convenient operation. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of Embodiment 1 in the locked state;

[0023] Figure 2 This is a schematic diagram of the structure of Embodiment 1 in a non-locked state;

[0024] Figure 3 This is a diagram of the locked state of Embodiment 1 with the lock plate in a non-locked position;

[0025] Figure 4This is a schematic diagram of the structure of Embodiment 2 in the locked state.

[0026] The markings in the attached diagram are as follows: 1-locking tooth, 2-locking groove, 3-locking plate, 4-limiting plate, 5-support plate, 6-pull rod, 7-slide rod, 8-elastic element, 9-guide element, 10-limit switch, 11-tension spring, 12-first drive wheel, 13-second drive wheel, 14-wire rope, 15-drive element, 301-first plate, 302-second plate. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0028] Example 1. A locking mechanism for a four-post lift, configured as follows: Figure 1-3 As shown, it includes a locking tooth 1 fixedly connected to the side wall of the column. Several locking grooves 2 are distributed at intervals along the height direction on the locking tooth 1. A locking plate 3 is fastened and connected in any locking groove 2. A lifting frame is slidably connected in the middle of the locking plate 3. A limiting plate 4 that is rotatably connected to the lifting frame is provided on the side of the locking plate 3 away from the locking tooth 1. A driving mechanism and a reset mechanism are respectively connected to the outside of the limiting plate 4. A telescopic component and a support plate 5 are respectively provided in the middle of the limiting plate 4. The telescopic component includes a pull rod 6 that is rotatably connected to the limiting plate 4. The end of the pull rod 6 extends to the outside of the limiting plate 4 and is rotatably connected to the locking plate 3.

[0029] The drive mechanism is used to control the limiting plate 4 to open toward the side away from the locking plate 3;

[0030] The reset mechanism is used to control the retraction of the limiting plate 4 toward the locking plate 3;

[0031] The telescopic component is used to control the lateral movement of the limiting plate 4;

[0032] The support plate 5 is used to support the bottom of the locking plate 3 after the limiting plate 4 is retracted into place.

[0033] The locking plate 3 is slidably connected to a T-shaped slide rod 7 in the middle. One side of the slide rod 7 is rotatably connected to a pull rod 6, and the other side of the slide rod 7 is connected to the locking plate 3 via an elastic element 8. The elastic element 8 is used to apply a squeezing force to the locking plate 3 toward the pull rod 6 after contraction.

[0034] The locking plate 3 includes two first plates 301 arranged side by side, which are connected to each other via a second plate 302. The first plates 301 and the second plates 302 are arranged perpendicularly to each other. One side of the slide rod 7 is slidably connected to the second plate 302. The elastic element 8 is a compression spring sleeved on the outside of the slide rod 7. The slide rod 7 is provided with a pressure plate for applying unidirectional pressure to the second plate 302. The pressure plate is separated from the second plate 302 in the locked state. The two ends of the compression spring are respectively attached to the pressure plate and the second plate 302.

[0035] It also includes a guide 9 for fixing the lifting frame. There are two guides 9, which are located on the upper and lower sides of the locking plate 3 respectively. Several rubber rollers are arranged side by side on the guide 9, and the ends of the rubber rollers are in contact with the top or bottom of the first plate 301.

[0036] The second plate 302 has a limit switch 10 on the side near the lock groove 2, and the limit switch 10 is externally connected to the lifting frame; when the lock plate 3 and the lock groove 2 are in a mutually engaging state, the limit switch 10 is triggered by the pressure of the second plate 302, thereby realizing the fixed lock display function.

[0037] The reset mechanism is a tension spring 11, with the two ends of the tension spring 11 connected to the limiting plate 4 and the lifting frame, respectively.

[0038] The drive mechanism includes a first drive wheel 12 rotatably connected to the limiting plate 4. Two second drive wheels 13 are respectively connected to the lifting frame and the limiting plate 4 on the upper and lower sides of the first drive wheel 12. The first drive wheel 12 and the second drive wheels 13 are staggered left and right. Steel wire ropes 14 are connected to the first drive wheel 12 and the second drive wheels 13. One end of the steel wire rope 14 is connected to the lifting column, and the other end is connected to a drive component 15. The drive component 15 can be an operating handle or an electric telescopic rod. The locking mechanism can also be symmetrically arranged on both sides of the lifting column during installation, with the steel wire rope 14 passing through the two locking mechanisms sequentially to connect the lifting column and the drive component 15. This allows one drive component 15 to simultaneously lock both sides of the lifting frame, ensuring their synchronization.

[0039] The working principle of this utility model is as follows: When the lifting frame is in a non-locked state, the driving component 15 pulls the wire rope 14, causing the wire rope 14 to drive the limiting plate 4 to open outwards. After the limiting plate 4 rotates and opens, the pull rod 6 moves outwards and pulls the sliding rod 7, causing the sliding rod 7 and the locking plate 3 to move laterally outwards together until they separate from the locking groove 2, thereby releasing the limitation on the lifting frame.

[0040] When the lifting frame switches to the locked state, the drive component 15 controls the wire rope 14 to retract, causing the limiting plate 4 to rotate inward under the pull of the tension spring 11. During the rotation of the limiting plate 4, the pull rod 6 applies inward pressure to the slide rod 7, causing the slide rod 7 to apply pressure to the locking plate 3 through the elastic element 8 under the pressure. If the locking plate 3 is in the locked position, it moves to engage with the locking groove 2 after being pressed. If the locking plate 3 is in the non-locked position, it moves to fit against the side wall of the locking tooth 1 after being pressed. At the same time, the elastic element 8 is compressed and retracts, so that when the lifting frame moves to the locked position, the elastic element 8 drives the locking plate 3 to engage with the locking groove 2, thus realizing the locking function.

[0041] With the above combination, operators can lock the lifting frame at any height and lock it when the lifting frame moves to the locking position, which facilitates the operation of the operators.

[0042] Example 2. A locking mechanism for a four-post lift, configured as follows: Figure 4 As shown, it includes a locking tooth 1 fixedly connected to the side wall of the column. Several locking grooves 2 are distributed at intervals along the height direction on the locking tooth 1. A locking plate 3 is fastened and connected in any locking groove 2. A lifting frame is slidably connected in the middle of the locking plate 3. A limiting plate 4 that is rotatably connected to the lifting frame is provided on the side of the locking plate 3 away from the locking tooth 1. A driving mechanism and a reset mechanism are respectively connected to the outside of the limiting plate 4. A telescopic component and a support plate 5 are respectively provided in the middle of the limiting plate 4. The telescopic component includes a pull rod 6 that is rotatably connected to the limiting plate 4. The end of the pull rod 6 extends to the outside of the limiting plate 4 and is rotatably connected to the locking plate 3.

[0043] The drive mechanism is used to control the limiting plate 4 to open toward the side away from the locking plate 3;

[0044] The reset mechanism is used to control the retraction of the limiting plate 4 toward the locking plate 3;

[0045] The telescopic component is used to control the lateral movement of the limiting plate 4;

[0046] The support plate 5 is used to support the bottom of the limiting plate 4 after the limiting plate 4 has retracted into place.

[0047] It also includes a guide 9 for fixing the lifting frame. There are two guides 9, which are located on the upper and lower sides of the locking plate 3 respectively. Several rubber rollers are arranged side by side on the guide 9, and the ends of the rubber rollers are in contact with the top or bottom of the locking plate 3.

[0048] A limit switch 10 is provided on one side of the locking plate 3, and the limit switch 10 is externally connected to the lifting frame. When the locking plate 3 and the locking groove 2 are in a mutually engaging state, the limit switch 10 is triggered by the pressure of the locking plate 3, thereby realizing the fixed lock display function.

[0049] The reset mechanism is a tension spring 11, with the two ends of the tension spring 11 connected to the limiting plate 4 and the lifting frame, respectively.

[0050] The drive mechanism includes a first drive wheel 12 rotatably connected to the limiting plate 4. Two second drive wheels 13 are respectively connected to the lifting frame and the limiting plate 4 on the upper and lower sides of the first drive wheel 12. The first drive wheel 12 and the second drive wheels 13 are staggered left and right. Steel wire ropes 14 are connected to the first drive wheel 12 and the second drive wheels 13. One end of the steel wire rope 14 is connected to the lifting column, and the other end is connected to a drive component 15. The drive component 15 can be an operating handle or an electric telescopic rod. The locking mechanism can also be symmetrically arranged on both sides of the lifting column during installation, with the steel wire rope 14 passing through the two locking mechanisms sequentially to connect the lifting column and the drive component 15. This allows one drive component 15 to simultaneously lock both sides of the lifting frame, ensuring their synchronization.

[0051] Compared with Embodiment 1, in this embodiment, the pull rod 6 is directly rotatably connected to the locking plate 3, so that the limiting plate 4 can achieve rigid drive translation of the locking plate 3 after rotation, and the locking plate 3 can achieve its locking and unlocking functions through translation extension and retraction.

Claims

1. A locking mechanism for a four-post lift, characterized in that: The system includes a locking tooth (1) fixedly connected to the side wall of the column. Several locking grooves (2) are distributed at intervals along the height direction on the locking tooth (1). A locking plate (3) is fastened in any locking groove (2). A lifting frame is slidably connected to the middle of the locking plate (3). A limiting plate (4) that is rotatably connected to the lifting frame is provided on the side of the locking plate (3) away from the locking tooth (1). A driving mechanism and a reset mechanism are respectively connected to the outside of the limiting plate (4). A telescopic component and a support plate (5) are respectively provided in the middle of the limiting plate (4). The telescopic component includes a pull rod (6) that is rotatably connected to the limiting plate (4). The end of the pull rod (6) extends to the outside of the limiting plate (4) and is rotatably connected to the locking plate (3). The drive mechanism is used to control the limiting plate (4) to open toward the side away from the locking plate (3); The reset mechanism is used to control the retraction of the limiting plate (4) toward the locking plate (3); The telescopic component is used to control the lateral movement of the limiting plate (4); The support plate (5) is used to support the bottom of the locking plate (3) after the limiting plate (4) is retracted into place.

2. The locking mechanism for a four-post lift according to claim 1, characterized in that: The locking plate (3) is slidably connected to a T-shaped slide rod (7) in the middle. One side of the slide rod (7) is rotatably connected to a pull rod (6), and the other side of the slide rod (7) is connected to the locking plate (3) via an elastic element (8). The elastic element (8) is used to apply a squeezing force to the locking plate (3) towards the pull rod (6).

3. The locking mechanism for a four-post lift according to claim 2, characterized in that: The locking plate (3) includes two first plates (301) arranged side by side, which are connected to each other via a second plate (302). One side of the slide rod (7) is slidably connected to the second plate (302). The elastic element (8) is a compression spring sleeved on the outside of the slide rod (7), with both ends of the compression spring respectively in contact with the slide rod (7) and the second plate (302).

4. The locking mechanism for a four-post lift according to claim 3, characterized in that: It also includes a guide (9) for fixing the lifting frame. There are two guides (9) and they are located on the upper and lower sides of the lock plate (3) respectively. Several rubber rollers are arranged side by side on the guide (9), and the ends of the rubber rollers are in contact with the top or bottom of the first plate (301).

5. The locking mechanism for a four-post lift according to claim 3, characterized in that: The second plate (302) has a limit switch (10) on the side near the lock groove (2), and the limit switch (10) is externally connected to the lifting frame.

6. The locking mechanism for a four-post lift according to claim 1, characterized in that: The reset mechanism is a tension spring (11), and the two ends of the tension spring (11) are respectively connected to the limiting plate (4) and the lifting frame.

7. The locking mechanism for a four-post lift according to claim 1, characterized in that: The drive mechanism includes a first drive wheel (12) rotatably connected to a limiting plate (4), and second drive wheels (13) provided on the upper and lower sides of the first drive wheel (12). The first drive wheel (12) and the second drive wheel (13) are offset to each other. A wire rope (14) is connected to the first drive wheel (12) and the second drive wheel (13). One end of the wire rope (14) is connected to the lifting column, and the other end of the wire rope (14) is connected to a drive component (15).

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