Limiting device for crane trolley

Abstract

The utility model relates to the technical field of crane trolley limiting, in particular to a crane trolley limiting device which comprises a guide rail, a trolley body is arranged above the guide rail, the bottom of the trolley body is rotatably connected with four rollers, and the rollers can roll on the guide rail. A trolley body drives a rubber ball to make contact with a vertical plate, the rubber ball drives a cross rod through the vertical plate to compress a second spring, the cross rod drives a connecting plate to compress an elastic air bag, a rectangular box drives a ball to move through a round rod to roll on the inclined face of a triangular block, and the triangular block compresses a third spring. Under the action of self elasticity of rubber balls, first springs, elastic air bags, second springs, third springs and rubber pads, the buffering effect is achieved, so that the speed of the trolley body is reduced, in the actual use process, the speed of the crane trolley can be effectively reduced, the trolley body can be buffered, and the service life of the trolley body is prolonged. And the trolley body is not easy to run too fast and collide with the baffle to cause damage.

Description

Technical Field

[0001] This utility model relates to the field of crane trolley limiting technology, specifically a crane trolley limiting device. Background Technology

[0002] The crane trolley is an important part of the crane's lifting device. It is mounted on the crane's main beam and travels on the rails on the main beam to achieve the lateral movement of the lifted object. Due to the large weight and irregular shape of the crane trolley, if a malfunction occurs during the crane trolley's movement, there is a risk that the trolley will run off the rails. Currently, the only limit device for crane trolleys is to install anti-collision plates at both ends of the rails.

[0003] However, the installed anti-collision plates cannot effectively slow down the speed of the crane trolley in actual use, nor can they buffer the trolley body. The trolley body is prone to running too fast and hitting the baffle, resulting in damage. Therefore, we propose a crane trolley limiting device to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to provide a crane trolley limiting device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a crane trolley limiting device, including a guide rail, a trolley body above the guide rail, four rollers rotatably connected to the bottom of the trolley body, the rollers being able to roll on the guide rail, two rectangular boxes fixedly connected to both sides of the trolley body, two baffles fixedly connected to the top of the guide rail, a rectangular rod slidably connected inside the rectangular box, a rubber ball fixedly connected to the end of the rectangular rod, and a first spring fixedly connected between the other end of the rectangular rod and the inner wall of the corresponding rectangular box, a fixed box fixedly connected to the side of the two baffles that are close to each other, a vertical plate provided on the outside of the fixed box, two horizontal bars fixedly connected to the side of the two vertical plates that are far from each other, the ends of the horizontal bars extending into the corresponding fixed boxes, the fixed boxes slidably sleeved on the outside of the corresponding two horizontal bars, a connecting plate fixedly connected between the side of the corresponding two horizontal bars that are close to each other, and an elastic airbag fixedly connected between the connecting plate and the inner wall of the corresponding fixed box.

[0006] More preferably, two positioning rods are fixedly connected to the inner walls of the two fixed boxes on the side away from each other, and the crossbar is slidably sleeved on the outside of the corresponding positioning rod.

[0007] More preferably, the end of the crossbar is fixedly connected to the inner wall of the fixed box with the same second spring, and the second spring is movably sleeved on the outside of the corresponding positioning rod.

[0008] More preferably, the top and bottom of the rectangular box are fixedly connected to round rods, and the ends of the round rods are fitted with ball bearings.

[0009] More preferably, each of the two fixed boxes is fixedly connected to a support plate on the side that is close to each other, and a triangular block is provided on the outer side of the support plate, and a square rod is fixedly connected to the side of the triangular block that is close to the corresponding support plate.

[0010] More preferably, the support plate is slidably sleeved on the outside of the corresponding square rod, and the triangular block and the corresponding support plate are fixedly connected by the same third spring.

[0011] More preferably, the third spring is movably sleeved on the outside of the corresponding square rod, and a rubber pad is fixedly connected to the outside of the support plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: The trolley body of this utility model drives the rubber ball to contact the vertical plate. The rubber ball drives the crossbar through the vertical plate to compress the second spring. The crossbar drives the connecting plate to compress the elastic airbag. The rectangular box drives the ball to move and roll on the inclined surface of the triangular block through the round rod. The triangular block compresses the third spring. Under the action of the rubber ball, the first spring, the elastic airbag, the second spring, the third spring and the elasticity of the rubber pad itself, a buffering effect is achieved, thereby slowing down the speed of the trolley body. In actual use, it can effectively slow down the speed of the crane trolley and buffer the trolley body. The trolley body is not likely to run too fast and hit the baffle, causing damage. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the internal cross-sectional structure of the fixing box in this utility model;

[0015] Figure 3 This is a schematic diagram of the internal cross-sectional structure of the rectangular box in this utility model;

[0016] Figure 4 for Figure 1 A magnified structural diagram of area A in the middle.

[0017] In the diagram: 1. Guide rail; 2. Baffle; 3. Cart body; 4. Roller; 5. Rectangular box; 6. Rectangular rod; 7. Rubber ball; 8. First spring; 9. Fixing box; 10. Vertical plate; 11. Horizontal bar; 12. Positioning rod; 13. Connecting plate; 14. Elastic airbag; 15. Second spring; 16. Round rod; 17. Ball bearing; 18. Support plate; 19. Triangular block; 20. Square rod; 21. Third spring; 22. Rubber pad. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example

[0020] Please see Figure 1-4This utility model provides a technical solution: a crane trolley limiting device, including a guide rail 1, a trolley body 3 above the guide rail 1, four rollers 4 rotatably connected to the bottom of the trolley body 3, the rollers 4 being able to roll on the guide rail 1, two rectangular boxes 5 fixedly connected to both sides of the trolley body 3, two baffles 2 fixedly connected to the top of the guide rail 1, a rectangular rod 6 slidably connected inside the rectangular box 5, a rubber ball 7 fixedly connected to the end of the rectangular rod 6, and the same first spring 8 fixedly connected between the other end of the rectangular rod 6 and the inner wall of the corresponding rectangular box 5, a fixed box 9 fixedly connected to the side of the two baffles 2 that are close to each other, a vertical plate 10 provided on the outside of the fixed box 9, and two horizontal bars 11 fixedly connected to the side of the two vertical plates 10 that are far from each other, the ends of the horizontal bars 11 extending into the corresponding fixed box 9, the fixed box 9 slidably sleeved on the outside of the corresponding two horizontal bars 11, the corresponding two horizontal bars 11 being close to each other. A connecting plate 13 is fixedly connected to one side of the trolley body 3. An elastic airbag 14 is fixedly connected between the connecting plate 13 and the inner wall of the corresponding fixed box 9. The trolley body 3 drives the rubber ball 7 to contact the vertical plate 10. The rubber ball 7 drives the horizontal bar 11 to compress the second spring 15 through the vertical plate 10. The horizontal bar 11 drives the connecting plate 13 to compress the elastic airbag 14. The rectangular box 5 drives the ball bearing 17 to move and roll on the inclined surface of the triangular block 19 through the round rod 16. The triangular block 19 compresses the third spring 21. Under the action of the elastic force of the rubber ball 7, the first spring 8, the elastic airbag 14, the second spring 15, the third spring 21 and the rubber pad 22, a buffering effect is achieved, thereby slowing down the speed of the trolley body 3. In actual use, it can effectively slow down the speed of the crane trolley and buffer the trolley body 3. The trolley body 3 is not likely to run too fast and hit the baffle 2, causing damage.

[0021] In this embodiment, specifically: two positioning rods 12 are fixedly connected to the inner walls of the two fixed boxes 9 on the side away from each other, and the crossbar 11 is slidably sleeved on the outside of the corresponding positioning rod 12;

[0022] In this embodiment, specifically: the end of the crossbar 11 is fixedly connected to the inner wall of the fixed box 9 with the same second spring 15, and the second spring 15 is movably sleeved on the outside of the corresponding positioning rod 12;

[0023] In this embodiment, specifically: the top and bottom of the rectangular box 5 are fixedly connected with round rods 16, and the ends of the round rods 16 are fitted with ball bearings 17;

[0024] In this embodiment, specifically: support plates 18 are fixedly connected to the sides of the two fixed boxes 9 that are close to each other, and triangular blocks 19 are provided on the outer side of the support plates 18. A square rod 20 is fixedly connected to the side of the triangular blocks 19 that is close to the corresponding support plate 18.

[0025] In this embodiment, specifically: the support plate 18 is slidably sleeved on the outside of the corresponding square rod 20, and the triangular block 19 is fixedly connected to the corresponding support plate 18 by the same third spring 21;

[0026] In this embodiment, specifically: the third spring 21 is movably sleeved on the outside of the corresponding square rod 20, and a rubber pad 22 is fixedly connected to the outside of the support plate 18.

[0027] In operation, the present invention works as follows: When the trolley body 3 moves along the guide rail 1 via the rollers 4 and needs to stop, the trolley body 3 moves the rectangular box 5. The rectangular box 5 moves the rubber ball 7 via the rectangular rod 6 and it comes into contact with the vertical plate 10. Under the impact force of the trolley body 3 itself, the rubber ball 7 moves the two horizontal rods 11 via the vertical plate 10. The horizontal rods 11 slide outside the corresponding positioning rods 12. During the movement, the horizontal rods 11 compress the second spring 15. The two corresponding horizontal rods 11 move the same connecting plate 13 and compress the elastic airbag 14. When the second spring 15 and the elastic airbag 14 are compressed to their limit, the reaction force generated causes the rubber ball 7 to move the rectangular rod 6 inside the rectangular box 5 and compress the first spring 8. At the same time, the rectangular box 5 moves through the round rod 1... The 6 drives the ball 17 to move. The ball 17 rolls on the inclined surface of the corresponding triangular block 19 and generates a squeezing force. Under the action of the squeezing force, the triangular block 19 drives the square rod 20 to move. During the movement, the triangular block 19 compresses the corresponding third spring 21. At the same time, the two sides of the trolley body 3 contact the corresponding rubber pads 22 respectively. At this time, under the action of the elasticity of the rubber ball 7, the first spring 8, the elastic airbag 14, the second spring 15, the third spring 21 and the rubber pad 22, a buffering effect is achieved, thereby slowing down the speed of the trolley body 3. This constitutes a crane trolley limiting device. In actual use, it can effectively slow down the speed of the crane trolley and buffer the trolley body 3. The trolley body 3 is not easy to run too fast and hit the baffle 2, causing damage.

[0028] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A trolley limiter for a crane, comprising a rail (1), characterized in that: The upper portion of the guide rail (1) is provided with a trolley body (3), the bottom of the trolley body (3) is rotatably connected with four rollers (4), the rollers (4) can roll on the guide rail (1), both sides of the trolley body (3) are fixedly connected with two rectangular boxes (5), the top of the guide rail (1) is fixedly connected with two baffles (2), the rectangular box (5) is slidably connected with a rectangular rod (6), the end of the rectangular rod (6) is fixedly connected with a rubber ball (7), the other end of the rectangular rod (6) and the inner wall of the corresponding rectangular box (5) are fixedly connected with the same first spring (8), one side of the two baffles (2) away from each other is fixedly connected with a fixed box (9), the outer side of the fixed box (9) is provided with a vertical plate (10), two vertical plates (10) are fixedly connected with two horizontal rods (11) away from each other, the end of the horizontal rod (11) extends into the corresponding fixed box (9), the fixed box (9) is slidably sleeved on the outer side of the two horizontal rods (11), the corresponding two horizontal rods (11) are fixedly connected with the same connecting plate (13) away from each other, the connecting plate (13) and the inner wall of the corresponding fixed box (9) are fixedly connected with the same elastic air bag (14).

2. A trolley position limiting device according to claim 1, characterised in that: Two fixed boxes (9) are fixedly connected with two positioning rods (12) away from each other on the inner wall, the horizontal rod (11) is slidably sleeved on the outer side of the corresponding positioning rod (12).

3. A trolley position limiting device according to claim 2, characterised in that: The end of the horizontal rod (11) and the inner wall of the fixed box (9) are fixedly connected with the same second spring (15), and the second spring (15) is movably sleeved on the outer side of the corresponding positioning rod (12).

4. A trolley position limiting device according to claim 3, characterised in that: The top and bottom of the rectangular box (5) are fixedly connected with a circular rod (16), and the end of the circular rod (16) is embedded with a ball (17).

5. A trolley position limiting device according to claim 4, characterised in that: Two fixed boxes (9) are fixedly connected with a support plate (18) away from each other, the outer side of the support plate (18) is provided with a triangular block (19), and the side of the triangular block (19) close to the corresponding support plate (18) is fixedly connected with a square rod (20).

6. A trolley position limiting device according to claim 5, characterised in that: The support plate (18) is slidably sleeved on the outer side of the corresponding square rod (20), and the triangular block (19) and the corresponding support plate (18) are fixedly connected with the same third spring (21).

7. A trolley position limiting device according to claim 6, characterised in that: The third spring (21) is movably sleeved on the outer side of the corresponding square rod (20), and the outer side of the support plate (18) is fixedly connected with a rubber pad (22).

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