Limiting connector capable of adjusting effective limiting length

Abstract

The utility model discloses a limit joint capable of adjusting effective limit length, which is in threaded connection with a main control valve body of an excavator, a valve core is arranged on the inner side of the main control valve body of the excavator, an annular groove is arranged on the main control valve body for mounting a joint main body, the limit joint comprises a joint main body, a first external thread section is arranged at the right end of the joint main body, and a second external thread section is arranged at the right end of the joint main body. A second external thread section is arranged at the left end of the connector body, a sealing ring is arranged on the outer side of the right end of the second external thread section, an internal thread section penetrating through the second external thread section and the inner side of the connector body is arranged on the inner side of the connector body, and a limiting lead screw is in threaded connection with the inner side of the internal thread section. A second inner hexagonal slot is formed in the left end of the limiting screw rod, a first inner hexagonal slot is formed in the right end of the limiting screw rod, a third external thread section is arranged on the circumferential surface of the limiting screw rod, and the first inner hexagonal slot and the second inner hexagonal slot are the same in structure and size. And the debugging operation is simplified and the efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model application relates to excavator technical field, specifically is a kind of effective limiting length adjustable limit connector. BACKGROUND

[0002] In the hydraulic excavator flow regulating process, limit connector is used to limit the opening degree of main control valve stem, and then control oil way flow, to control the purpose of hydraulic excavator action, the effective limiting length of conventional limit connector is fixed, and it needs to replace different length limit connector for debugging many times when adjusting, which will cause unnecessary trouble, at the same time, the effective limiting length of conventional limit connector is fixed, although it can replace multiple specifications limit connector, but on-site debugging cannot be realized using arbitrary length connector for testing, the required effective limiting length cannot be accurately determined, and it is easy to cause inaccurate debugging problem.

[0003] Therefore, the present application provides a kind of limit connector with stepless adjustment length, debugging is more accurate, and simplifies debugging operation to improve efficiency, which is the problem to be solved by the present application. UTILITY MODEL CONTENT

[0004] In view of the deficiencies of the prior art, the utility model aims to provide a kind of effective limiting length adjustable limit connector, which can realize stepless adjustment length, debugging is more accurate, and simplifies debugging operation to improve efficiency.

[0005] The utility model discloses the technical scheme adopted by the device is: a kind of effective limiting length adjustable limit connector, with the main control valve body of excavator is screwed, the inside of excavator main control valve body is provided with valve core, the main control valve body is provided with annular recess for installing connector main body, it includes connector main body, the right end of the connector main body is provided with first outer thread section, the left end of the connector main body is provided with second outer thread section, the outer side of the right end of the second outer thread section is provided with sealing ring, the inner thread section of the inside of the connector main body is provided with through second outer thread section, the inside of the inner thread section is provided with limit lead screw, the left end of the limit lead screw is provided with second internal hexagonal slot and the right end is provided with first internal hexagonal slot, the circumference of the limit lead screw is provided with third outer thread section, the first internal hexagonal slot and second internal hexagonal slot structure, size are same.

[0006] Further, the inside of the limit lead screw is provided with left-right through flow channel.

[0007] Further, the diameter of the flow channel is less than the inscribed circle of the first internal hexagonal slot cross section.

[0008] Further, there is a spacing between the left end of the third outer thread section and the end of the second internal hexagonal slot.

[0009] Furthermore, it also includes a wrench used in conjunction with a limit screw.

[0010] Furthermore, the wrench includes a connecting block, an external hexagonal plug connected to the end of the connecting block, an outer cover provided on the outer side of the end of the external hexagonal plug, an identification mark provided on the edge of the circumferential surface of the outer cover, and a handle connected to the tail of the connecting block.

[0011] Furthermore, the external hexagonal plug passes through the plug body and its end is inserted into the inside of the first internal hexagonal slot.

[0012] Furthermore, an annular step is provided on the right circumferential surface of the plug body, and a scale is provided on the annular step.

[0013] The beneficial effects of this utility model device are:

[0014] 1. This utility model adopts a structure in which the connector body has a built-in fiber screw. The position of the limit screw relative to the valve core can be adjusted by adjusting the limit screw. There is no need to frequently change the specifications of the limit connector during the adjustment process. This realizes stepless length adjustment, making the debugging more accurate, simplifying the debugging operation and improving efficiency. Attached Figure Description

[0015] Figure 1 This is a structural view of Embodiment 1 of the present utility model.

[0016] Figure 2 This is a structural view of the limiting lead screw according to Embodiment 1 of this utility model.

[0017] Figure 3 This is a structural view of Embodiment 2 of this utility model.

[0018] Figure 4 This is a view of a traditional connector structure.

[0019] Explanation of reference numerals in the attached drawings: 1-Connector body; 2-First external thread section; 3-Internal thread section; 4-Annular step; 5-Scale; 6-Sealing ring; 7-Second external thread section; 8-Limit screw; 9-First internal hexagonal socket; 10-Second internal hexagonal socket; 11-Third external thread section; 12-Wrench; 13-External hexagonal insert; 14-Outer cover; 15-Identification marking; 16-Connecting block; 17-Handle; 18-Main control valve body; 19-Valve core. Detailed Implementation

[0020] The present invention will be further described below with reference to specific embodiments. These embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0021] Example 1: See Figure 1 , Figure 2 This is a structural view of Embodiment 1 and a structural view of the limiting screw 8 in Embodiment 1 of this utility model. It describes a limiting connector with an adjustable effective limiting length, threadedly connected to the main control valve body 18 of an excavator. A valve core 19 is provided inside the main control valve body 18. An annular groove is provided on the main control valve body 18 for installing the connector body 1. The connector body 1 includes a connector body 1. A first external thread section 2 is provided at the right end of the connector body 1 for external pipeline connection. A second external thread section 7 is provided at the left end of the connector body 1 for threaded connection with the threaded hole on the main control valve body 18. A sealing ring 6 is provided on the outer side of the right end of the second external thread section 7, located inside the annular groove for sealing the oil passage. An internal thread section 3, penetrating the second external thread section 7 and the inner side of the connector body 1, is provided inside the connector body 1. A limiting screw 8 is threadedly connected to the inner side of the internal thread section 3. A second internal hexagonal socket 1 is provided at the left end of the limiting screw 8. The first internal hexagonal socket 9 is provided at the right end, and the third external thread section 11 is provided on the circumferential surface of the limiting screw 8. The limiting screw 8 has a flow channel that runs through it from left to right. The diameter of the flow channel is smaller than the inscribed circle of the cross-section of the first internal hexagonal socket 9. The first internal hexagonal socket 9 and the second internal hexagonal socket 10 have the same structure and size. There are two ways to adjust the limiting screw 8. The first way is to remove the external pipeline, insert a hexagonal tool from the right side of the connector body 1, and rotate the limiting screw 8 in the first internal hexagonal socket 9 to adjust the position of the left end of the limiting screw 8 relative to the valve core 19. The second way is to remove the connector body 1, insert a hexagonal tool into the second internal hexagonal socket 10 from the left end, and rotate the limiting screw 8 to adjust the position of the left end of the limiting screw 8 relative to the valve core 19. The above adjustment methods can achieve stepless adjustment, eliminating the need to carry a large number of limiting connectors of various sizes for debugging, thus saving a lot of debugging time.

[0022] To prevent the limiting screw 8 from damaging the threads when it comes into contact with the valve core 19, a gap is designed between the left end of the third external thread section 11 and the end of the second internal hexagonal socket 10, so that the third external thread section 11 does not come into direct contact with the valve core 19.

[0023] Example 2: Based on the above examples, when adjusting the limit screw 8, a hexagonal tool is required. Conventional hexagonal tools can only serve as adjustment tools. The angle and number of rotations are mostly judged by experience and feeling. In order to improve the efficiency of the adjustment operation, this utility model also includes a wrench 12 used in conjunction with the limit screw 8.

[0024] The wrench 12 includes a connecting block 16, with an external hexagonal plug 13 connected to the end of the connecting block 16. An outer cover 14 is provided on the outer side of the end of the external hexagonal plug 13, and a marking 15 is provided on the edge of the circumferential surface of the outer cover 14. A handle 17 is connected to the tail of the connecting block 16. The external hexagonal plug 13 passes through the plug body and its end is inserted into the inner side of the first internal hexagonal socket 9. An annular step 4 is provided on the circumferential surface of the right end of the plug body, and a scale 5 is provided on the circumferential surface of the annular step 4. When the wrench 12 is turned to adjust the limit screw 8, the angle can be calculated according to the number of scales 5 that the marking 15 on the wrench 12 has rotated relative to the scale 5. This is convenient and quick, eliminating the estimation step and making it more accurate and convenient.

[0025] This utility model adopts a structure in which the connector body 1 has a built-in fiber screw. The position of the limit screw 8 relative to the valve core 19 can be adjusted by adjusting the limit screw 8. There is no need to frequently change the specifications of the limit connector during the adjustment process. This realizes stepless adjustment of length, making the debugging more accurate, simplifying the debugging operation and improving efficiency.

Claims

1. A limiting connector with adjustable effective limiting length, threadedly connected to the main control valve body (18) of an excavator, wherein a valve core (19) is provided on the inner side of the main control valve body (18), and an annular groove is provided on the main control valve body (18) for installing the connector body (1), characterized in that: The connector includes a connector body (1), with a first external thread section (2) at the right end and a second external thread section (7) at the left end. A sealing ring (6) is provided on the outer side of the right end of the second external thread section (7). An internal thread section (3) is provided on the inner side of the connector body (1) that passes through the second external thread section (7) and the inner side of the connector body (1). A limiting screw (8) is threaded on the inner side of the internal thread section (3). A second internal hexagonal socket (10) is provided on the left end of the limiting screw (8) and a first internal hexagonal socket (9) is provided on the right end. A third external thread section (11) is provided on the circumferential surface of the limiting screw (8). The first internal hexagonal socket (9) and the second internal hexagonal socket (10) have the same structure and size.

2. The adjustable effective limiting joint according to claim 1, characterized in that: The limiting screw (8) has a flow channel that runs through the left and right sides.

3. A limiting connector with adjustable effective limiting length according to claim 2, characterized in that: The diameter of the flow channel is smaller than the inscribed circle of the cross-section of the first internal hexagonal socket (9).

4. The adjustable effective limiting joint according to claim 1, characterized in that: There is a gap between the left end of the third external thread segment (11) and the end of the second internal hexagonal socket (10).

5. A limiting connector with adjustable effective limiting length according to claim 1, characterized in that: It also includes a wrench (12) used in conjunction with the limit screw (8).

6. A limiting connector with adjustable effective limiting length according to claim 5, characterized in that: The wrench (12) includes a connecting block (16), the end of which is connected to an external hexagonal plug (13), an outer cover (14) is provided on the outer side of the end of the external hexagonal plug (13), an identification mark (15) is provided on the edge of the circumferential surface of the outer cover (14), and a handle (17) is connected to the tail of the connecting block (16).

7. A limiting connector with adjustable effective limiting length according to claim 6, characterized in that: The external hexagonal plug (13) passes through the plug body and its end is inserted into the inside of the first internal hexagonal slot (9).

8. A limiting connector with adjustable effective limiting length according to claim 7, characterized in that: An annular step (4) is provided on the right circumferential surface of the plug body, and a scale (5) is provided on the annular step (4).

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