Multi-center-distance quick-change connector

Abstract

The utility model relates to the technical field of excavators, in particular to a multi-center-distance quick-change connector. A reinforcing plate is welded to the middle of the left side of a supporting seat, a through groove is formed in the middle of the reinforcing plate, a connecting shaft is arranged in the middle of a movable shaft seat, a limiting plate is rotationally arranged on the connecting shaft, the limiting plate penetrates through the middle of the through groove, and a safety pin is arranged on the portion, on the left side of the reinforcing plate, of the reinforcing plate and used for fixing a positioning plate. The fixed shaft sleeve and the movable shaft sleeve are prevented from separating from the central shaft; the left side of the limiting plate is positioned through the safety pin, the limiting plate can be prevented from moving rightwards, and therefore the accessory can be prevented from being disengaged from the connector.

Description

Technical Field

[0001] The utility model relates to the technical field of excavators, in particular to a multi-center distance quick-change connector. Background Art

[0002] Quick change, also known as quick change connector, is designed for quick replacement of accessories with different functions. It can greatly save manpower by quickly replacing different accessories. Replacing accessories is time-consuming, labor-intensive and unsafe. It is designed to solve many problems. Traditional quick change connectors do not have anti-fall protection structure and have certain safety hazards.

[0003] The center distance between the two axes of the commonly used quick-change attachments is (for example: 235-260), so a quick-change connector protection structure is needed with a center distance of 235-260, which is suitable for different attachments to prevent the attachments from falling off due to cylinder failure and causing danger. Utility Model Content

[0004] The technical problem to be solved by the present invention is to provide a multi-center distance quick-change connector in response to the above-mentioned technical deficiencies, including a reinforcement plate welded on the middle part of the left side of the support seat, a through groove is arranged in the middle part of the reinforcement plate, a connecting shaft is arranged in the middle part of the movable shaft seat, a limiting plate is arranged on the rotating shaft of the connecting shaft, the limiting plate is arranged through the middle part of the through groove, and a safety pin is arranged on the reinforcement plate on the left side of the reinforcement plate for fixing the positioning plate to prevent the fixed shaft sleeve and the movable shaft sleeve from separating from the center shaft; the left side of the limit plate is positioned by the safety pin to prevent the limit plate from moving to the right side, thereby preventing the attachment from separating from the connector.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a multi-center distance quick-change connector, characterized in that it includes:

[0006] A connecting seat, the top is connected to the mechanical arm of the excavator;

[0007] A support seat is fixedly arranged on the right side of the connecting seat, and a fixed shaft sleeve is arranged on the right side of the bottom of the support seat;

[0008] A movable shaft seat, the movable shaft seat is arranged on the left side inside the connecting seat, the upper part of the movable shaft seat is connected to the connecting seat rotating shaft, and a movable shaft sleeve is arranged on the lower left side of the movable shaft seat;

[0009] A hydraulic cylinder is arranged inside the connecting seat, one end of the hydraulic cylinder is connected to the rotating shaft of the supporting seat, and the other end is connected to the rotating shaft of the movable shaft seat;

[0010] and an attachment base, with two central shafts arranged on the top, the two central shafts being connected and fixed by a fixed shaft sleeve and a movable shaft sleeve respectively;

[0011] Among them, a reinforcing plate is welded to the middle part of the left side of the support seat, a through groove is arranged in the middle part of the reinforcing plate, a connecting shaft is arranged in the middle part of the movable shaft seat, a limiting plate is arranged in the middle part of the rotating shaft of the connecting shaft, and the limiting plate is arranged through the middle part of the through groove, and a safety pin is arranged on the left side of the reinforcing plate for fixing the positioning plate to prevent the fixed shaft sleeve and the movable shaft sleeve from separating from the center shaft.

[0012] To further optimize the technical solution, a limiting hole is arranged on the limiting plate, the safety pin is arranged inside the limiting hole, and a plurality of limiting holes are distributed on the limiting plate.

[0013] To further optimize the technical solution, two groups of tension springs are arranged inside the connecting seat, one end of the tension spring is arranged on the connecting shaft, and the other end is fixedly arranged on the reinforcing plate.

[0014] To further optimize the technical solution, the tension springs are symmetrically arranged on the left and right sides of the limit plate.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] 1. The center distance is 235-260, suitable for different accessories.

[0017] 2. The setting of the limit plate and the coordination of the safety pin and the limit hole can effectively limit and fix the movable shaft seat to prevent the center shaft from separating from the movable shaft seat and the fixed shaft seat.

[0018] 3. Two sets of tension springs are arranged inside the connecting seat, one end of the tension spring is arranged on the connecting shaft, and the other end is fixedly arranged on the reinforcing plate. The movable sleeve can be tightened to the left by the tension spring to prevent the left center shaft from detaching from the movable sleeve.

[0019] 4. The tension springs are symmetrically arranged on the left and right sides of the limit plate, which can prevent the movable shaft seat from being subjected to unilateral force, so that the movable shaft seat is subjected to uniform force and the rotation of the movable shaft seat is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The figure is a three-dimensional structural diagram of a multi-center distance quick-change connector.

[0021] Figure 2 The figure is a schematic diagram of the internal installation structure of a multi-center distance quick-change connector.

[0022] Figure 3 The figure is a schematic diagram of the installation position of the tension spring of a multi-center distance quick-change connector.

[0023] Figure 4 The present invention is a schematic diagram of the front installation structure of a limit plate of a multi-center distance quick-change connector.

[0024] Figure 5The figure is a schematic diagram of the limit plate structure of a multi-center distance quick-change connector.

[0025] In the figure: 1. connecting seat; 101. reinforcing plate; 102. through groove; 2. supporting seat; 201. fixed shaft sleeve; 3. movable shaft seat; 301. movable shaft sleeve; 302. connecting shaft; 4. hydraulic cylinder; 5. accessory base; 501. center shaft; 6. limit plate; 601. limit hole; 7. safety pin; 8. tension spring. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0027] Specific implementation method 1: Combination Figure 1-5 As shown, a multi-center distance quick-change connector is characterized by comprising:

[0028] Connecting seat 1, the top is connected with the mechanical arm of the excavator;

[0029] The support seat 2 is fixedly arranged on the right side of the connecting seat 1, and a fixed shaft sleeve 201 is arranged on the right side of the bottom of the support seat 2;

[0030] A movable shaft seat 3, wherein the movable shaft seat 3 is arranged on the left side inside the connecting seat 1, the upper part of the movable shaft seat 3 is connected to the rotating shaft of the connecting seat 1, and a movable shaft sleeve 301 is arranged on the lower left side of the movable shaft seat 3;

[0031] A hydraulic cylinder 4 is arranged inside the connecting seat 1, one end of the hydraulic cylinder 4 is connected to the rotating shaft of the supporting seat 2, and the other end is connected to the rotating shaft of the movable shaft seat 3;

[0032] The attachment base 5 has two central shafts 501 on the top, and the two central shafts 501 are connected and fixed by a fixed shaft sleeve 201 and a movable shaft sleeve 301 respectively;

[0033] Among them, a reinforcing plate 101 is welded to the middle part of the left side of the support seat 2, a through groove 102 is arranged in the middle part of the reinforcing plate 101, a connecting shaft 302 is arranged in the middle part of the movable shaft seat 3, and a limiting plate 6 is arranged in the middle part of the rotating shaft of the connecting shaft 302, and the limiting plate 6 is arranged through the middle part of the through groove 102. A safety pin 7 is arranged on the left side of the reinforcing plate 101 for fixing the positioning plate to prevent the fixed shaft sleeve 201 and the movable shaft sleeve 301 from detaching from the center shaft 501.

[0034] Preferably, a limiting hole 601 is provided on the limiting plate 6 , and the safety pin 7 is provided inside the limiting hole 601 . There are a plurality of limiting holes 601 distributed on the limiting plate 6 .

[0035] Preferably, two groups of tension springs 8 are arranged inside the connecting seat 1 , one end of the tension spring 8 is arranged on the connecting shaft 302 , and the other end is fixedly arranged on the reinforcing plate 101 .

[0036] Preferably, the tension springs 8 are symmetrically arranged on the left and right sides of the limiting plate 6 .

[0037] How it works: See Figure 2 As shown, the hydraulic cylinder 4 is arranged inside the connecting seat 1, one end of the hydraulic cylinder 4 is connected to the rotating shaft of the supporting seat 2, and the other end is connected to the rotating shaft of the movable shaft seat 3. When the piston rod of the hydraulic cylinder 4 is retracted, the hydraulic cylinder 4 will pull the movable shaft seat 3 to rotate counterclockwise, and when the movable shaft seat 3 moves, it will drive the movable shaft sleeve 301 to move together, and the movable shaft seat 3 rotates counterclockwise, so that the center distance between the movable shaft sleeve 301 and the fixed shaft sleeve 201 becomes smaller. When the piston rod of the hydraulic cylinder 4 is fully retracted, the connecting seat 1 is driven to move to the top of the attachment base 5 through the control of the excavator mechanical arm, so that the fixed shaft sleeve 201 and the movable shaft sleeve 301 at the bottom of the connecting seat 1 are located between the two center axes 501 above the attachment base 5.

[0038] Then the telescopic rod of the hydraulic cylinder 4 is extended, thereby pushing the movable shaft seat 3 to rotate clockwise. The movable shaft seat 3 rotates so that the center distance between the fixed shaft sleeve 201 and the movable shaft sleeve 301 becomes larger, and the fixed shaft sleeve 201 and the movable shaft sleeve 301 expand outward. When the fixed shaft sleeve 201 and the movable shaft sleeve 301 expand outward, the two center shafts 501 can be fixed and locked by the fixed shaft sleeve 201 and the movable shaft sleeve 301, so that the tool base 5 is fixed under the connecting seat 1, realizing the quick change process.

[0039] See also Figure 1 , 2 , 4 and 5, a reinforcing plate 101 is welded to the middle part of the left side of the support seat 2, a through slot 102 is arranged in the middle part of the reinforcing plate 101, a connecting shaft 302 is arranged in the middle part of the movable shaft seat 3, a limiting plate 6 is arranged in the middle part of the rotating shaft of the connecting shaft 302, and the limiting plate 6 is arranged through the middle part of the through slot 102, and a safety pin 7 is arranged on the reinforcing plate 101 on the left side of the reinforcing plate 101 for fixing the positioning plate to prevent the fixed shaft sleeve 201 and the movable shaft sleeve 301 from being separated from the central shaft 501, when the movable shaft seat 3 rotates counterclockwise, it will push the limiting plate 6 to move to the left together, and in this process, the limiting plate 6 slides to the left along the through slot 102.

[0040] The limiting plate 6 is provided with a limiting hole 601, and the safety pin 7 is arranged inside the limiting hole 601. There are a plurality of limiting holes 601 distributed on the limiting plate 6. After the two center shafts 501 above the accessory base 5 are fixed and locked, the limiting hole 601 on the limiting plate 6 on the left side of the reinforcing plate 101, wherein the safety pin 7 is inserted into the limiting hole 601 closest to the reinforcing plate 101, and the limiting plate 6 is fixed and locked by the safety pin 7. At this time, under the action of the safety pin 7, the limiting plate 6 cannot be withdrawn to the right from the through groove 102 of the reinforcing plate 101, so the clockwise rotation of the movable shaft seat 3 can be limited, and at the same time, the retraction of the piston rod of the hydraulic cylinder 4 can be limited, so as to prevent the failure of the hydraulic cylinder 4 from causing the center shaft 501 to separate from the fixed shaft sleeve 201 and the movable shaft sleeve 301; there are a plurality of limiting holes 601 distributed on the limiting plate 6, which can be suitable for different types of accessories and has a wide range of applications.

[0041] When the attachment base 5 is removed, similarly, the safety pin 7 is pulled out, and the hydraulic cylinder 4 is retracted, thereby driving the movable shaft seat 3 to rotate clockwise, and the distance between the movable shaft sleeve 301 and the fixed shaft sleeve 201 becomes smaller. When the movable shaft sleeve 301 and the fixed shaft sleeve 201 reach a certain distance, the central shaft 501 is separated from the movable shaft sleeve 301 and the fixed shaft sleeve 201, and the attachment base 5 is automatically removed.

[0042] See also Figure 3 Two groups of tension springs 8 are arranged inside the connecting seat 1, one end of the tension spring 8 is arranged on the connecting shaft 302, and the other end is fixedly arranged on the reinforcing plate 101. The setting of the tension spring 8 can give a clockwise pulling force to the movable shaft seat 3, and the movable shaft sleeve 301 can be tightened to the left under the action of the clockwise pulling force. When the hydraulic cylinder 4 fails, the movable shaft sleeve 301 can be tightened to the left by the tension spring 8 to prevent the central shaft 501 from detaching from the movable shaft sleeve 301 and the fixed shaft sleeve 201, thereby playing a certain protective role.

[0043] The tension springs 8 are symmetrically arranged on the left and right sides of the limiting plate 6 to prevent the movable shaft seat 3 from being subjected to force on one side, so that the movable shaft seat 3 is subjected to force evenly and the rotation of the movable shaft seat 3 is more stable.

[0044] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be realized by simple programming by technicians in this field, which belongs to the common knowledge in this field. In addition, the present invention is mainly used to protect mechanical devices, so the present invention will not explain the control method and circuit connection in detail.

[0045] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims, or the equivalent forms of such scope and boundaries.

Claims

1. A multi-center distance quick-change connector, characterized in that: include: A connecting seat, the top is connected to the mechanical arm of the excavator; A support seat is fixedly arranged on the right side of the connecting seat, and a fixed shaft sleeve is arranged on the right side of the bottom of the support seat; A movable shaft seat, the movable shaft seat is arranged on the left side inside the connecting seat, the upper part of the movable shaft seat is connected to the connecting seat rotating shaft, and a movable shaft sleeve is arranged on the lower left side of the movable shaft seat; A hydraulic cylinder is arranged inside the connecting seat, one end of the hydraulic cylinder is connected to the rotating shaft of the supporting seat, and the other end is connected to the rotating shaft of the movable shaft seat; and an attachment base, with two central shafts arranged on the top, the two central shafts being connected and fixed by a fixed shaft sleeve and a movable shaft sleeve respectively; Among them, a reinforcing plate is welded to the middle part of the left side of the support seat, a through groove is arranged in the middle part of the reinforcing plate, a connecting shaft is arranged in the middle part of the movable shaft seat, a limiting plate is arranged in the middle part of the rotating shaft of the connecting shaft, and the limiting plate is arranged through the middle part of the through groove, and a safety pin is arranged on the left side of the reinforcing plate for fixing the positioning plate to prevent the fixed shaft sleeve and the movable shaft sleeve from separating from the center shaft.

2. The multi-center distance quick-change connector according to claim 1, characterized in that: The limiting plate is provided with a limiting hole, the safety pin is arranged inside the limiting hole, and a plurality of the limiting holes are distributed on the limiting plate.

3. The multi-center distance quick-change connector according to claim 1, characterized in that: Two groups of tension springs are arranged inside the connecting seat, one end of the tension spring is arranged on the connecting shaft, and the other end is fixedly arranged on the reinforcing plate.

4. The multi-center distance quick-change connector according to claim 3, characterized in that: The tension springs are symmetrically arranged on the left and right sides of the limiting plate.

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