Lever type locking structure for corbel of double-column lifting machine

Abstract

The utility model relates to the technical field of lifting machines, and discloses a double-column lifting machine corbel lever type locking structure, which solves the problems in the background technology, and comprises a trapezoidal plate, the middle part and the lower part of the trapezoidal plate are respectively connected with a U-shaped plate, a corbel connecting pin is rotatably arranged between the two U-shaped plates, and the corbel connecting pin is connected with the trapezoidal plate. A half-tooth block is installed on the lower portion of each corbel connecting pin through a bolt, the two corbel connecting pins are symmetrically arranged, a pull rod pin is further arranged between the two U-shaped plates, the pull rod pin is slidably connected to the two U-shaped plates in the vertical direction, a tooth locking block is fixedly installed on the lower portion of the pull rod pin, and a tooth locking groove is formed in the lower portion of the tooth locking block. According to the lifting machine corbel locking device, when the weight of the lifting machine corbel is large, the tooth locking block is tightly meshed with the half-tooth block, and the locking can be unlocked by applying relatively small force through the lever structures.

Description

Technical Field

[0001] The utility model belongs to the technical field of lifts, in particular to a lever-type locking structure for a supporting arm of a double-column lift. Background Art

[0002] Two-post lifts are mainly used to lift cars to a certain height. The specific usage process is: the operator rotates the support arm of the two-post lift and extends it under the car to align the lifting end of the support arm with the lifting point of the car, and then operates the lift to slide the slide upward along the column, while driving the support arm to move upward, thereby lifting the car. During the upward movement of the slide, the locking tooth block in the support arm locking structure automatically falls and engages with the half tooth block, thereby locking the support arm and the slide. After the locking tooth block automatically falls and engages with the half tooth block, if you want to open the locking tooth block in the support arm locking structure, you need to manually lift the pull rod in the locking structure.

[0003] In the existing support arm locking structure, the structure of the pull rod is mostly a straight pull rod, such as Figure 1 The pull rod shown in the schematic diagram of the existing support arm locking structure is relatively tight when the lift support arm itself is heavy, and it is relatively difficult to manually apply force to lift the pull rod vertically, which makes the operation difficult. For this reason, we propose a lever-type locking structure for the support arm of a two-post lift. Utility Model Content

[0004] In order to solve the problem that in the existing support arm locking structure, most of the pull rod structures are straight pull rods, and when the lift support arm itself is heavy, the locking tooth block and the half tooth block are tightly engaged, and it is relatively difficult to manually apply force to lift the pull rod vertically, which is difficult to operate, the utility model provides the following technical solutions: a double-column lift support arm lever locking structure, comprising a trapezoidal plate, the middle and lower parts of the trapezoidal plate are respectively connected to a U-shaped plate, a support arm connecting pin is rotatably provided between the two U-shaped plates, and the lower part of the support arm connecting pin is fixed by a bolt It is equipped with a half-tooth block, and there are two support arm connecting pins. The two support arm connecting pins are symmetrically arranged, and a pull rod pin is also arranged between the two U-shaped plates. The pull rod pin is slidably connected to the two U-shaped plates in the vertical direction. A locking tooth block is fixedly installed on the lower part of the pull rod pin, and the locking tooth block can engage with the half-tooth block and lock the support arm connecting pin to prevent rotation. A lever structure is provided on the top of the two pull rod pins. The lever structure is a force-saving lever, which can exert a force on the lever structure that is less than the force of directly lifting the pull rod pin to drive the pull rod pin to rise.

[0005] Preferably, the lever structure includes a lever and a support member, the middle part of the lever is rotatably connected to the top of the pull rod pin, the support member is fixedly mounted on the trapezoidal plate, one end of the lever abuts against the support member, and the support member can serve as a fulcrum of the lever to provide support.

[0006] Preferably, the support is a right-angled triangular plate, two right-angle edges of the support are fixedly connected with the trapezoidal plate and the U-shaped plate respectively, a lever hole is formed in the support, one end of the lever abuts against the lever hole, the diameter of the lever hole is larger than the diameter of the lever, and the lever can be obliquely inserted into the lever hole.

[0007] Preferably, a lever slot with a width corresponding to the width of the lever is formed in the top of the pull rod pin, first connecting pin holes are symmetrically formed in the lever slot, second connecting pin holes matched with the first connecting pin holes are formed in the lever, and a connecting pin can be rotatably inserted into the first connecting pin holes and the second connecting pin holes.

[0008] Preferably, a spring is circumferentially sleeved on the pull rod pin, the spring is arranged between the lock tooth block and the U-shaped plate in the middle part, the pull rod pin can compress the spring when rising, and the pull rod pin can be reset by the elongation of the compressed spring when descending.

[0009] Preferably, the trapezoidal plate, the U-shaped plate and the support are welded together.

[0010] Compared with the prior art, the utility model has the advantages that:

[0011] The end of the lever away from the fulcrum is applied with a force greater than that applied to directly lift the pull rod pin, the lever is rotated on the pull rod pin, the pull rod pin is driven to slide upward in the two U-shaped plates, the spring is compressed, the lock tooth block and the half tooth block connected together are separated, the locking of the support arm connecting pin is released, the support arm connecting pin can be freely adjusted and rotated within a limited angle, the lever is released when the angle is adjusted to a proper angle, the elongation of the compressed spring drives the pull rod pin to reset, the lock tooth block and the half tooth block return to the state of mutual engagement, the support arm connecting pin is locked, the angle change during use is avoided, and when the lifting machine support arm is heavy, the lock tooth block and the half tooth block are engaged more tightly, the lever structure can be used to apply a relatively small force to release the locking. BRIEF DESCRIPTION OF DRAWINGS

[0012] The accompanying drawings are used to provide a further understanding of the utility model, constitute a part of the specification, are used together with the embodiments of the utility model to explain the utility model, and do not constitute a limitation on the utility model. In the drawings:

[0013] Figure 1 It is a schematic view of a prior support arm locking structure

[0014] Figure 2 It is a schematic view of a lever type locking structure of the utility model

[0015] Figure 3This is a schematic diagram of the structure of the lever-type locking part of the utility model

[0016] Figure 4 Schematic diagram of the explosion of the lever-type locking structure of this utility model

[0017] In the figure: 1. Trapezoidal plate; 2. Pull rod pin; 2-1. Lever slot; 2-2. First connecting pin hole; 3. Lever; 3-1. Second connecting pin hole; 4. Support arm connecting pin; 5. Spring; 6. Half tooth block; 7. Lock tooth block; 8. Bolt; 9. U-shaped plate; 10. Connecting pin; 11. Support member; 11-1. Lever hole. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] Depend on Figure 1-4 It is given that the utility model includes a trapezoidal plate 1, and the middle and lower parts of the trapezoidal plate 1 are respectively connected with U-shaped plates 9, and a support arm connecting pin 4 is rotatably arranged between the two U-shaped plates 9. A half-tooth block 6 is installed at the lower part of the support arm connecting pin 4 through a bolt 8. There are two support arm connecting pins 4, and the two support arm connecting pins 4 are symmetrically arranged. A pull rod pin 2 is also arranged between the two U-shaped plates 9, and the pull rod pin 2 is slidably connected to the two U-shaped plates 9 in the vertical direction. A locking tooth block 7 is fixedly installed at the lower part of the pull rod pin 2, and the locking tooth block 7 can be engaged with the half-tooth block 6 and lock the support arm connecting pin 4 to prevent rotation. A lever structure is provided on the top of the two pull rod pins 2. The lever structure is a force-saving lever, which can exert a force on the lever structure that is less than the force of directly lifting the pull rod pin 2 to drive the pull rod pin 2 to rise.

[0020] The lever structure includes a lever 3 and a support member 11. The middle part of the lever 3 is rotatably connected to the top of the pull rod pin 2. The support member 11 is fixedly mounted on the trapezoidal plate 1. One end of the lever 3 abuts against the support member 11. The support member 11 can serve as a fulcrum for the lever 3 to provide support.

[0021] The support member 11 is a right-angled triangular flat plate. The two right-angled sides of the support member 11 are fixedly connected to the trapezoidal plate 1 and the U-shaped plate 9 respectively. A lever hole 11-1 is opened on the support member 11. One end of the lever 3 abuts against the lever hole 11-1. The diameter of the lever hole 11-1 is larger than the diameter of the lever 3. The lever 3 can be inserted obliquely into the lever hole 11-1.

[0022] A lever slot 2-1 with a width matching the width of the lever 3 is provided at the top of the pull rod pin 2, a first connecting pin hole 2-2 is symmetrically provided on the lever slot 2-1, a second connecting pin hole 3-1 matching the first connecting pin hole 2-2 is provided on the lever 3, and a connecting pin 10 is rotatably connected between the first connecting pin hole 2-2 and the second connecting pin hole 3-1.

[0023] The pull rod pin 2 is circumferentially sleeved with a spring 5, which is arranged between the lock tooth block 7 and the U-shaped plate 9 in the middle. When the pull rod pin 2 rises, the spring 5 can be compressed. When the pull rod pin 2 is released, the compressed spring 5 can extend and drive the pull rod pin 2 to descend and reset.

[0024] The trapezoidal plate 1 , the U-shaped plate 9 and the support member 11 are welded together.

[0025] Working principle: When in use, the lever hole 11-1 opened on the support member 11 is used as a fulcrum, and a force greater than the direct lifting force of the pull rod pin 2 is applied to the end of the lever 3 away from the fulcrum. The lever 3 rotates on the pull rod pin 2, driving the pull rod pin 2 to slide upward in the two U-shaped plates 9, and at the same time compressing the spring 5, thereby separating the meshing locking tooth block 7 and the half tooth block 6, releasing the lock of the support arm connecting pin 4, and allowing the support arm connecting pin 4 to be freely adjusted and rotated within a limited angle. When adjusted to a suitable angle, the lever 3 is released, and the compressed spring 5 extends, driving the pull rod pin 2 to descend and reset, thereby returning the locking tooth block 7 and the half tooth block 6 to a state of mutual meshing, locking the support arm connecting pin 4, avoiding danger caused by angle changes during use, and thus achieving that when the weight of the lift arm is large, the locking tooth block and the half tooth block are tightly engaged, and the lock can be released by applying a relatively small force through the lever structure.

[0026] It should be noted that, in this document, relational terms such as first and second, etc., are used only 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 terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lever-type locking structure for a two-post lift support arm, comprising a trapezoidal plate (1), wherein the middle and lower portions of the trapezoidal plate (1) are respectively connected to U-shaped plates (9), a support arm connecting pin (4) is rotatably provided between the two U-shaped plates (9), a half tooth block (6) is mounted on the lower portion of the support arm connecting pin (4) via a bolt (8), and there are two support arm connecting pins (4), which are symmetrically arranged, characterized in that: A pull rod pin (2) is also provided between the two U-shaped plates (9), and the pull rod pin (2) is slidably connected to the two U-shaped plates (9) in the vertical direction. A locking tooth block (7) is fixedly installed at the lower part of the pull rod pin (2), and the locking tooth block (7) can be engaged with the half tooth block (6) and lock the support arm connecting pin (4) to prevent rotation. A lever structure is provided on the top of the two pull rod pins (2), and the lever structure is a force-saving lever, which can apply a force on the lever structure that is less than the force of directly lifting the pull rod pin (2) to drive the pull rod pin (2) to rise.

2. The lever-type locking structure for the support arm of a two-post lift according to claim 1, characterized in that: The lever structure includes a lever (3) and a support member (11), wherein the middle portion of the lever (3) is rotatably connected to the top end of the pull rod pin (2), and the support member (11) is fixedly mounted on the trapezoidal plate (1). One end of the lever (3) abuts against the support member (11), and the support member (11) can serve as a fulcrum for the lever (3) to provide support.

3. The lever-type locking structure for the support arm of a two-post lift according to claim 2, characterized in that: The support member (11) is a right-angled triangular flat plate. The two right-angled sides of the support member (11) are fixedly connected to the trapezoidal plate (1) and the U-shaped plate (9) respectively. A lever hole (11-1) is provided on the support member (11). One end of the lever (3) abuts against the lever hole (11-1). The diameter of the lever hole (11-1) is larger than the diameter of the lever (3). The lever (3) can be obliquely inserted into the lever hole (11-1).

4. The lever-type locking structure for the support arm of a two-post lift according to claim 3, characterized in that: The top of the pull rod pin (2) is provided with a lever slot (2-1) whose width matches the width of the lever (3); a first connecting pin hole (2-2) is symmetrically provided on the lever slot (2-1); a second connecting pin hole (3-1) matching the first connecting pin hole (2-2) is provided on the lever (3); a connecting pin (10) is rotatably connected through the first connecting pin hole (2-2) and the second connecting pin hole (3-1).

5. The lever-type locking structure for the support arm of a two-post lift according to claim 4, characterized in that: The pull rod pin (2) is circumferentially sleeved with a spring (5), and the spring (5) is arranged between the locking tooth block (7) and the U-shaped plate (9) in the middle.

6. The lever-type locking structure for the support arm of a two-post lift according to claim 5, characterized in that: The trapezoidal plate (1), the U-shaped plate (9) and the support member (11) are welded together.

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