Improved cargo elevator balance lock

Abstract

The utility model relates to the technical field of cargo elevator balance locks, in particular to an improved cargo elevator balance lock. Comprising a contact seat, a mounting plate and a protective sleeve arranged on the mounting plate, a movable cavity is formed in the protective sleeve, a supporting shaft is arranged in the movable cavity, a driving device for driving the supporting shaft is arranged on the side, away from the movable cavity, of the protective sleeve, the contact seat comprises a base, and a left limiting plate and a right limiting plate are arranged on the two sides of the top of the base; one end of the supporting shaft extending out of the movable cavity is limited by a left limiting plate and a right limiting plate; the supporting shaft is limited on the arc-shaped plate between the left limiting plate and the right limiting plate, under the action of the compression spring, the left limiting plate, the right limiting plate and the arc-shaped plate are controlled by gravity to limit the supporting shaft, the stability of the goods elevator can be effectively improved, meanwhile, under the action of the compression spring, the supporting shaft can be buffered, and the service life of the goods elevator is prolonged. And safety accidents caused by the fact that the supporting shaft 5 is damaged due to large impact force after extending out when the goods elevator falls rapidly are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of freight elevator balance locks, and in particular to an improved freight elevator balance lock. Background Art

[0002] The balance lock is an auxiliary tool for hanging heavy production equipment. It is used by people who do continuous and repetitive work on the production line to hang, concentrate, carry and remove tools. It is easy to operate pneumatic, electrical and hydraulic tools; balancers are mostly used in freight elevators, and the balance lock has high requirements for freight elevators. It can ensure the safety of the freight elevator. In recent years, freight elevator accidents have occurred frequently, mostly due to poor quality. The balance lock is one of the most important components in the lifting freight elevator. It is mainly used to eliminate the occurrence of falling accidents and ensure the safety inside the freight elevator. Therefore, the balance lock plays an important role in the work of lifting freight elevators.

[0003] The existing freight elevator balance lock still has certain defects in use: the existing freight elevator balance lock manufacturers produce freight elevator balance locks, and the support shaft of the balance lock is in a retracted state when the freight elevator is operating normally. When it needs to stop or in an emergency, the support shaft of the balance lock extends out and falls on the contact plate of the freight elevator, so that the freight elevator stops safely. At present, the support shaft of the balance lock is a cylindrical structure. During normal use, the cylindrical support shaft is extended and hard-contacted with the contact plate of the freight elevator. The contact area between the force-bearing part of the lower part of the cylindrical support shaft and the contact plate is relatively small. If the goods in the freight elevator are unevenly placed or a malfunction occurs, it is easy to cause the support shaft to slide on the contact plate, making the freight elevator unstable, and over time, it is easy to cause damage to other parts of the balance lock; if the freight elevator fails and falls rapidly, the extended cylindrical support shaft is easily damaged by a large impact force, which in turn causes a safety accident, making it difficult to ensure the safety of personnel. Utility Model Content

[0004] The utility model aims at the deficiencies of the prior art and provides an improved freight elevator balance lock to solve the technical problems mentioned in the above background technology.

[0005] In order to achieve the above-mentioned technical objectives, the utility model proposes the following technical solutions: an improved freight elevator balance lock, comprising a contact seat, a mounting plate and a protective cover arranged on the mounting plate, an active cavity is opened in the protective cover, a support shaft is arranged in the active cavity, a driving device for driving the support shaft is arranged on the side of the protective cover away from the active cavity, the contact seat comprises a base, a left limit plate and a right limit plate are arranged on both sides of the top of the base, and one end of the support shaft extending out of the active cavity is limited by the left limit plate and the right limit plate.

[0006] Furthermore, a slide groove is provided on the top of the base, a limiting hole is provided at the bottom of the slide groove, a slider is slidably installed in the slide groove, a left connecting rod and a right connecting rod are respectively connected to the two sides of the slider, the end of the left connecting rod away from the slider is connected to the inner wall of the left limiting plate, the end of the right connecting rod away from the slider is connected to the inner wall of the right limiting plate, a compression spring is built into the limiting hole, the bottom of the compression spring is connected to the base through a connecting plate, a damping is built into the compression spring, one end of the damping is connected to the bottom of the slider through a mounting plate, and the other end of the damping passes through the limiting hole and is connected to the bottom of the base.

[0007] Furthermore, a mounting groove is formed at one end of the protective sleeve away from the supporting shaft, and the driving device includes an electric push rod, one end of the electric push rod is fixed in the mounting groove through a pin shaft, and the protruding end of the electric push rod is connected to the supporting shaft.

[0008] Furthermore, the mounting plate is provided with a plurality of mounting holes.

[0009] Furthermore, a support rod is fixedly connected to the top of the sliding block, and an arc-shaped plate is fixedly connected to the top of the support rod.

[0010] Furthermore, the arc-shaped plate is provided with anti-slip grooves.

[0011] Compared with the prior art, the beneficial effects produced by the utility model are: the utility model has a novel structure, ingenious conception, simple and convenient operation, and has the following advantages compared with the prior art: the utility model limits the support shaft on the arc plate between the left limit plate and the right limit plate, and uses gravity to control the left limit plate and the right limit plate and the arc plate to limit them under the action of the compression spring, which can effectively improve the stability of the freight elevator. At the same time, under the cooperation of the compression spring and the damping, the support shaft can be buffered to prevent the support shaft from being damaged by a large impact force after being extended when the freight elevator falls rapidly, thereby causing a safety accident. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 It is a schematic diagram of the internal structure of the protective cover of the utility model;

[0014] Figure 3 It is a structural schematic diagram of the contact seat of the utility model;

[0015] Figure 4 It is a schematic diagram of the internal structure of the contact seat of the utility model.

[0016] In the figure, 1. contact seat; 2. mounting plate; 3. protective cover; 4. movable cavity; 5. support shaft; 6. base; 7. left limit plate; 8. right limit plate; 9. slide groove; 10. limit hole; 11. slider; 12. left connecting rod; 13. right connecting rod; 14. compression spring; 15. damping; 16. mounting groove; 17. electric push rod; 18. mounting hole; 19. support rod; 20. arc plate. DETAILED DESCRIPTION

[0017] The following are specific embodiments of the present invention, and the technical solution of the present invention is further described in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments.

[0018] like Figure 1-4 As shown, the utility model provides an improved freight elevator balance lock, including a contact seat 1, a mounting plate 2 and a protective sleeve 3 arranged on the mounting plate 2, an active cavity 4 is opened in the protective sleeve 3, a support shaft 5 is built in the active cavity 4, and a driving device for driving the support shaft 5 is provided on the side of the protective sleeve 3 away from the active cavity 4. The contact seat 1 includes a base 6, and the two sides of the top of the base 6 are hinged with a left limit plate 7 and a right limit plate 8. One end of the support shaft 5 extending out of the active cavity 4 is limited by the left limit plate 7 and the right limit plate 8. The top of the base 6 is opened with a slide groove 9, and the bottom of the slide groove 9 A limit hole 10 is provided in the part, and a slider 11 is slidably installed in the slide groove 9. The two sides of the slider 11 are respectively hinged with a left connecting rod 12 and a right connecting rod 13. The end of the left connecting rod 12 away from the slider 11 is hinged to the inner wall of the left limit plate 7, and the end of the right connecting rod 13 away from the slider 11 is hinged to the inner wall of the right limit plate 8. The limit hole 10 is built with a compression spring 14, and the compression spring 14 is built with a damper 15. One end of the damper 15 is connected to the bottom of the slider 11 through a mounting plate, and the other end of the damper 15 passes through the limit hole 10 and is connected to the bottom of the base 6 through a bolt. In this embodiment, one end of the compression spring 14 is fixedly connected to the mounting plate, and when the slider 11 moves downward, the compression spring 14 is driven to contract.

[0019] like Figure 1-4As shown, the protective cover 3 is fixed to the cargo box of the freight elevator through the mounting plate 2, the contact seat 1 is installed on the frame of the freight elevator, the support shaft 5 is extended and retracted in the movable cavity 4 through the driving device, and the support shaft 5 extends out of the movable cavity 4 and is limited by the left limit plate 7 and the right limit plate 8, which can prevent the support shaft 5 from being displaced on the contact seat 1 and affecting the stability of the freight elevator. When the support shaft 5 falls between the left limit plate 7 and the right limit plate 8, the compression spring 14 and the damping 15 act together to buffer the gravity of the support shaft 5 when it falls. If the freight elevator fails and falls rapidly, it can effectively prevent the support shaft 5 from being damaged by a large impact force after it is extended, thereby causing a safety accident.

[0020] The end of the protective sleeve away from the support shaft 5 is provided with a mounting groove 16 , and the driving device includes an electric push rod 17 , one end of the electric push rod 17 is fixed in the mounting groove 16 through a pin shaft, and the extended end of the electric push rod 17 is hinged to the support shaft 5 .

[0021] like Figure 2 As shown, the electric push rod 17 is detachably mounted in the mounting groove 16 via a pin shaft, which is convenient for timely replacement or maintenance later. When the electric push rod 17 is started, its output end can drive the support shaft 5 to extend or retract to the active cavity 4.

[0022] The mounting plate 2 is provided with a plurality of mounting holes 18 .

[0023] like Figure 1 As shown, the mounting hole 18 is used to detachably mount the mounting plate 2 on the cargo box of the freight elevator by bolts, so as to facilitate later replacement or maintenance.

[0024] A support rod 19 is fixedly connected to the top of the sliding block 11 , and an arc plate 20 is fixedly connected to the top of the support rod 19 .

[0025] like Figure 4 As shown, the arc plate 20 is used to support and limit the support shaft 5 to prevent the support shaft 5 from moving left and right between the left limit plate 7 and the right limit plate 8.

[0026] The arc plate 20 is provided with anti-slip grooves.

[0027] like Figure 4As shown, the anti-slip grooves can further improve the stability of the support shaft 5.

[0028] Principle of use: Before use, the compression spring 14 is in the expanded state, the slider 11 slides out of the slide slot 9, and the baffle contacts the bottom of the base 6, the angle between the left connecting rod 12 and the right connecting rod 13 is enlarged, so that the left limit plate 7 and the right limit plate 8 are opened; when in use, the support shaft 5 is pushed out of the active cavity 4 under the push of the electric push rod 17, and the support shaft 5 pushes the active cavity 4 partly into the arc plate 20, the support shaft 5 presses down the arc plate 20, the compression spring 14 is compressed, the slider 11 slides into the slide slot 9, and the angle between the left connecting rod 12 and the right connecting rod 13 is enlarged. The left connecting rod 12 and the right connecting rod 13 respectively move downward with the slider 11 and pull the left limit plate 7 and the right limit plate 8 closer to each other, clamping and fixing the support shaft 5; similarly, when the freight elevator continues to go up or down, the support shaft 5 needs to be separated from the left limit plate 7 and the right limit plate 8. In the process of the cargo box driving the support shaft 5 to move upward, the compression spring 14 gradually expands, and the slider 11 drives the left connecting rod 12 and the right connecting rod 13 to move upward, so that the left limit plate 7 and the right limit plate 8 are gradually opened until the bottom of the support shaft 5 is completely separated from the arc plate 20.

[0029] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An improved cargo elevator balance lock, characterized in that: The invention comprises a contact seat (1), a mounting plate (2), and a protective sleeve (3) arranged on the mounting plate (2); an active cavity (4) is provided in the protective sleeve (3); a support shaft (5) is arranged in the active cavity (4); a driving device for driving the support shaft (5) is arranged on a side of the protective sleeve (3) away from the active cavity (4); the contact seat (1) comprises a base (6); a left limit plate (7) and a right limit plate (8) are arranged on both sides of the top of the base (6); and an end of the support shaft (5) extending out of the active cavity (4) is limited by the left limit plate (7) and the right limit plate (8).

2. An improved freight elevator balance lock according to claim 1, characterized in that: A slide groove (9) is provided at the top of the base (6), a limiting hole (10) is provided at the bottom of the slide groove (9), a slider (11) is slidably installed in the slide groove (9), a left connecting rod (12) and a right connecting rod (13) are respectively connected to the two sides of the slider (11), one end of the left connecting rod (12) away from the slider (11) is connected to the inner wall of the left limiting plate (7), and one end of the right connecting rod (13) away from the slider (11) is connected to the inner wall of the right limiting plate (8), the limiting hole (10) is built with a compression spring (14), and the compression spring (14) is built with a damper (15), one end of the damper (15) is connected to the bottom of the slider (11) through a mounting plate, and the other end of the damper (15) passes through the limiting hole (10) and is connected to the bottom of the base (6).

3. The improved freight elevator balance lock according to claim 1 is characterized in that: An installation groove (16) is formed at one end of the protective sleeve away from the support shaft (5), and the driving device comprises an electric push rod (17), one end of the electric push rod (17) is fixed in the installation groove (16) via a pin, and the protruding end of the electric push rod (17) is connected to the support shaft (5).

4. The improved freight elevator balance lock according to claim 1 is characterized in that: The mounting plate (2) is provided with a plurality of mounting holes (18).

5. The improved freight elevator balance lock according to claim 2 is characterized in that: A support rod (19) is fixedly connected to the top of the sliding block (11), and an arc-shaped plate (20) is fixedly connected to the top of the support rod (19).

6. An improved freight elevator balance lock according to claim 5, characterized in that: The arc-shaped plate (20) is provided with anti-slip grooves.

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