A positioning device for guide wheel support of walking beam of lower frame of excavator

Abstract

The utility model relates to the technical field of positioning devices, specifically to a positioning device for a guide wheel support of a walking beam under a frame of an excavator, a placing plate assembly is overlapped between a first movable block and a second movable block, a lower end of the placing plate assembly is fixedly connected to a support frame, an inner wall of the support frame is rotatably connected to a first screw rod and a second screw rod, an outer wall of the first screw rod is threadedly connected to the first movable block, an outer wall of the second screw rod is threadedly connected to the second movable block, upper ends of the first movable block and the second movable block are both fixedly connected to clamping blocks, opposite ends of the two groups of clamping blocks are both fixedly connected to elastic blocks, the first screw rod and the second screw rod rotate, and since the outer wall thread structures between the first screw rod and the second screw rod are opposite, the first movable block and the second movable block can be driven to move closer to each other, so that the two groups of clamping blocks clamp the guide wheel support, and at this time, multiple groups of elastic blocks can clamp the guide wheel support and evenly distribute the clamping force to avoid deformation.

Description

Technical Field

[0001] The utility model relates to the technical field of positioning devices, in particular to a positioning device for a guide wheel support of a walking beam under a frame of an excavator. Background Art

[0002] The traveling device of the excavator is mainly composed of a crawler frame and a traveling system, wherein the crawler frame includes the left longitudinal beam (left crawler frame), the main frame (middle frame) and the right longitudinal beam (right crawler frame). These parts are connected by welding and other processes to form a frame assembly with high load-bearing capacity. The guide wheel support is a component in the traveling device used to support and fix the guide wheel. The main function of the guide wheel is to guide the driving direction of the excavator, help the excavator maintain symmetrical driving and stability, and avoid deviation from the direction. At the same time, the guide wheel can also protect the normal operation of the vehicle tires and chassis when the excavator passes through different road conditions.

[0003] During the machining process, the guide wheel support needs to use a positioning device to ensure the machining accuracy and efficiency. In order to avoid deformation of the guide wheel support to be machined due to excessive clamping force, the existing positioning device makes the clamping contact surface larger. However, if there is no proper clamping force distribution design, the clamping force may be unevenly distributed on the contact surface, which may still lead to local stress concentration and deformation problems, and is not practical enough.

[0004] In view of the above problems, the utility model proposes a positioning device for a guide wheel support of a walking beam of a lower frame of an excavator. Utility Model Content

[0005] The utility model aims to provide a guide wheel support positioning device for a walking beam of an underframe of an excavator, thereby solving the problems in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a positioning device for a walking beam guide wheel support of an excavator lower frame, comprising a body, and a first movable block and a second movable block slidably connected to the upper wall of the body, a placement plate assembly overlapped between the first movable block and the second movable block, the lower end of the placement plate assembly is fixedly connected to a support frame, the inner wall of the support frame is rotatably connected to a first screw and a second screw, the outer wall of the first screw is threadedly connected to the first movable block, the outer wall of the second screw is threadedly connected to the second movable block, the upper ends of the first movable block and the second movable block are fixedly connected to clamping blocks, and the opposite ends of the two groups of clamping blocks are fixedly connected to elastic blocks.

[0007] Preferably, the first screw rod is fixedly connected to the second screw rod, and the outer wall thread structures between the first screw rod and the second screw rod are opposite.

[0008] Preferably, the elastic blocks are provided in multiple groups and are evenly arranged and distributed about the outer wall of the clamping block.

[0009] Preferably, the elastic block is a semi-cylindrical structure, and the elastic block is a component made of rubber material.

[0010] Preferably, the placement plate assembly includes a main plate fixedly connected to the upper end of the support frame, and side connecting plates fixedly connected to the first movable block and the second movable block respectively, and the side connecting plates are slidably connected to the inner wall of the main plate.

[0011] Preferably, the inner wall of the positive plate is fixedly connected with a middle partition plate, the end of the side connecting plate close to the middle partition plate is axially connected with a first inclined plate and a second inclined plate, the end of the first inclined plate away from the side connecting plate is axially connected with a slider A, the end of the second inclined plate away from the side connecting plate is axially connected with a slider B, and a return spring is fixedly connected between the sliders A and B.

[0012] Preferably, the slider A and the slider B are both slidably connected to the outer wall of the middle partition.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] The utility model proposes a positioning device for the guide wheel support of the walking beam of the lower frame of an excavator. The first screw and the second screw rotate. Since the outer wall thread structures between the first screw and the second screw are opposite, the first movable block and the second movable block can be driven to move closer to each other, so that the two groups of clamping blocks clamp the guide wheel support. At this time, multiple groups of elastic blocks will clamp the guide wheel support and evenly distribute the clamping force to avoid deformation. This solves the problem that if there is no appropriate clamping force distribution design, the clamping force may be unevenly distributed on the contact surface, which may still cause local stress concentration and deformation problems and insufficient practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the overall planar structure of the utility model;

[0017] Figure 3 For the utility model Figure 1 A schematic diagram of the enlarged structure at point A;

[0018] Figure 4 It is a schematic diagram of the structure of the placement plate assembly of the utility model.

[0019] In the figure: 1. body; 2. first movable block; 3. second movable block; 4. placement plate assembly; 41. main plate; 42. middle partition plate; 43. side connecting plate; 44. first inclined plate; 45. second inclined plate; 46. slider A; 47. slider B; 48. return spring; 5. support frame; 6. first screw; 7. second screw; 8. clamping block; 9. elastic block. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-Figure 4 In order to solve the problem that if there is no proper clamping force distribution design, the clamping force may be unevenly distributed on the contact surface, which may still lead to local stress concentration and deformation problems and insufficient practicality, the following preferred technical solutions are provided:

[0022] A positioning device for a guide wheel support of a walking beam of an excavator lower frame comprises a body 1, and a first movable block 2 and a second movable block 3 slidably connected to the upper wall of the body 1, a placement plate assembly 4 is overlapped between the first movable block 2 and the second movable block 3, a support frame 5 is fixedly connected to the lower end of the placement plate assembly 4, a first screw 6 and a second screw 7 are rotatably connected to the inner wall of the support frame 5, an outer wall of the first screw 6 is threadedly connected to the first movable block 2, an outer wall of the second screw 7 is threadedly connected to the second movable block 3, the upper ends of the first movable block 2 and the second movable block 3 are fixedly connected to a clamping block 8, and the opposite ends of the two groups of clamping blocks are fixedly connected to an elastic block 9.

[0023] The first screw rod 6 is fixedly connected to the second screw rod 7, and the outer wall thread structure between the first screw rod 6 and the second screw rod 7 is opposite. There are multiple groups of elastic blocks 9, and they are evenly arranged and distributed about the outer wall of the clamping block 8. The elastic blocks 9 are semi-cylindrical structures, and the elastic blocks 9 are components made of rubber material.

[0024] The placement plate assembly 4 includes a front plate 41 fixedly connected to the upper end of the support frame 5, and a side plate 43 fixedly connected to the first movable block 2 and the second movable block 3 respectively, the side plate 43 is slidably connected to the inner wall of the front plate 41, the inner wall of the front plate 41 is fixedly connected with a middle partition plate 42, the end of the side plate 43 close to the middle partition plate 42 is axially connected with a first inclined plate 44 and a second inclined plate 45, the end of the first inclined plate 44 away from the side plate 43 is axially connected with a slider A46, the end of the second inclined plate 45 away from the side plate 43 is axially connected with a slider B47, a return spring 48 is fixedly connected between the slider A46 and the slider B47, and the slider A46 and the slider B47 are both slidably connected to the outer wall of the middle partition plate 42.

[0025] Specifically, when positioning and fixing the guide wheel support to be processed, it is placed on the placement plate assembly 4, and the first screw 6 or the second screw 7 is connected to an external motor or a hand crank to drive the first screw 6 and the second screw 7 to rotate. Since the outer wall thread structures between the first screw 6 and the second screw 7 are opposite, the first movable block 2 and the second movable block 3 can be driven to move closer to each other, so that the two groups of clamping blocks 8 clamp the guide wheel support. At this time, multiple groups of elastic blocks 9 will clamp the guide wheel support and evenly distribute the clamping force to avoid deformation. This solves the problem that if there is no appropriate clamping force distribution design, the clamping force may be unevenly distributed on the contact surface, which may still cause local stress concentration and deformation problems and insufficient practicality.

[0026] When the first movable block 2 and the second movable block 3 move closer to each other, the side connecting plate 43 will move closer to the middle partition plate 42 under the pushing force, driving the first inclined plate 44 and the second inclined plate 45 to rotate at an angle, driving the slider A46 and the slider B47 to move away from each other, thereby tightening the reset spring 48. Therefore, when the positioning work is completed and the first movable block 2 and the second movable block 3 move away from each other, under the action of the reset spring 48, the side connecting plate 43 will be quickly reset.

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A positioning device for a guide wheel support of a walking beam of an excavator lower frame, comprising a body (1), and a first movable block (2) and a second movable block (3) slidably connected to an upper wall of the body (1), characterized in that: A placement plate assembly (4) is overlapped between the first movable block (2) and the second movable block (3); the lower end of the placement plate assembly (4) is fixedly connected to a support frame (5); the inner wall of the support frame (5) is rotatably connected to a first screw rod (6) and a second screw rod (7); the outer wall of the first screw rod (6) is threadedly connected to the first movable block (2); the outer wall of the second screw rod (7) is threadedly connected to the second movable block (3); the upper ends of the first movable block (2) and the second movable block (3) are fixedly connected to clamping blocks (8); and opposite ends of the two groups of clamping blocks are fixedly connected to elastic blocks (9).

2. The excavator lower frame walking beam guide wheel support positioning device according to claim 1, characterized in that: The first screw rod (6) is fixedly connected to the second screw rod (7), and the outer wall thread structures of the first screw rod (6) and the second screw rod (7) are opposite.

3. The positioning device for the guide wheel support of the lower frame walking beam of an excavator according to claim 1, characterized in that: The elastic blocks (9) are provided in multiple groups and are evenly arranged and distributed about the outer wall of the clamping block (8).

4. The positioning device for the guide wheel support of the walking beam of the lower frame of an excavator according to claim 1, characterized in that: The elastic block (9) is a semi-cylindrical structure, and the elastic block (9) is a component made of rubber material.

5. The positioning device for the guide wheel support of the walking beam of the lower frame of an excavator according to claim 1, characterized in that: The placement plate assembly (4) comprises a front plate (41) fixedly connected to the upper end of the support frame (5), and a side connecting plate (43) fixedly connected to the first movable block (2) and the second movable block (3), respectively, and the side connecting plate (43) is slidably connected to the inner wall of the front plate (41).

6. The positioning device for the guide wheel support of the walking beam of the lower frame of an excavator according to claim 5, characterized in that: The inner wall of the front plate (41) is fixedly connected to a middle partition plate (42); one end of the side connecting plate (43) close to the middle partition plate (42) is axially connected to a first inclined plate (44) and a second inclined plate (45); one end of the first inclined plate (44) away from the side connecting plate (43) is axially connected to a slider A (46); one end of the second inclined plate (45) away from the side connecting plate (43) is axially connected to a slider B (47); and a return spring (48) is fixedly connected between the slider A (46) and the slider B (47).

7. The excavator lower frame walking beam guide wheel support positioning device according to claim 6, characterized in that: The slider A (46) and the slider B (47) are both slidably connected to the outer wall of the middle partition plate (42).

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