Guide device in pin pulling of land leveler

Abstract

The utility model discloses a guide device in pin pulling of a land leveler, which comprises a frame, a swing frame and a pin shaft, the pin shaft is mounted in the swing frame, and the frame is connected with the swing frame through the pin shaft; the outer wall of the pin shaft is provided with a guide groove formed in the axial direction, the swing frame is provided with a positioning pin corresponding to the guide groove, and the positioning pin is arranged in the guide groove in a sliding mode. According to the scheme, the guide groove is formed in the peripheral wall of the pin shaft in the axial direction of the pin shaft, sliding of the pin shaft in the swing frame is not affected, the locating pin corresponding to the guide groove is arranged on the swing frame, the locating pin is arranged in the guide groove in a sliding mode, and the pin shaft can slide in the axial direction of the locating pin. The guide angle at the front end of the pin shaft can be accurately inserted into the positioning hole in the frame, and the problem that the pin shaft and the frame are difficult to position and install due to the fact that the pin shaft rotates too much is solved. The structure is simple, implementation is easy, and great convenience is brought to operators.

Description

Technical Field

[0001] The utility model belongs to the technical field of graders, and in particular relates to a guide device for pulling out a pin of a grader. Background Art

[0002] With the development of technology, hydraulic pin pullers have been widely used in graders, and there are two structural forms: single-acting cylinders and double-acting cylinders. For example, the patent with publication number CN201390985Y discloses a self-return adjustment and locking mechanism for the swing frame of a grader, and the patent number 202222900361.4 develops a pin puller with a floating connection structure in response to the current technical situation and shortcomings of the pin puller cylinder, which effectively improves the comprehensive reliability of this device.

[0003] The pin puller cylinder device manufactured according to the patented technology with patent number 202222900361.4 has been effectively verified in engineering practice for its comprehensive structural reliability. However, a new problem has arisen: when the pin is retracted to the bottom, under the dual effects of friction and oil hydraulic pressure, the pin will sometimes rotate around the rotation center, and eventually the pin end face profile and the frame hole profile will have a relative deflection angle, such as Figure 1 and Figure 2 If the deflection angle is too large and exceeds the guide range of the guide angle at the front end of the pin, it will be difficult to reinsert the pin, and it will take repeated attempts to reinsert it, which will cause inconvenience to the operator. Utility Model Content

[0004] In order to solve the technical problem in the background technology that the front end guide angle of the pin shaft is difficult to insert into the frame due to the rotation of the pin shaft, the utility model aims to provide a guide device for pulling out the pin of a grader, which can solve the above problem.

[0005] The technical solution for achieving the purpose of the utility model is: a guide device for pulling out a pin in a grader, comprising a frame, a swing frame, and a pin shaft, wherein the pin shaft is installed in the swing frame, and the frame and the swing frame are connected via the pin shaft; the outer wall of the pin shaft has a guide groove arranged axially, the swing frame has a positioning pin corresponding to the guide groove, and the positioning pin is slidably arranged in the guide groove.

[0006] In this solution, a guide groove is provided on the outer peripheral wall of the pin shaft and is provided along the axial direction of the pin shaft, which does not affect the sliding of the pin shaft in the swing frame. A positioning pin corresponding to the guide groove is provided on the swing frame. The positioning pin is slidably arranged in the guide groove, and the pin shaft can slide along its axial direction, but it will not rotate too much, ensuring that the guide angle of the front end of the pin shaft can be accurately inserted into the positioning hole on the frame, solving the problem that the pin shaft is difficult to position and install with the frame due to excessive rotation. The structure is simple, easy to implement, and brings great convenience to the operator.

[0007] Furthermore, the swing frame is provided with a mounting hole perpendicular to the guide groove, and the positioning pin is installed in the mounting hole. After the mounting hole and the guide groove are positioned correspondingly, the positioning pin can be inserted, which is convenient for installation.

[0008] Furthermore, the length of the guide groove is greater than the stroke of the pin in the swing frame, which is beneficial for maximizing the sliding distance of the pin in the swing frame without affecting its normal operation.

[0009] Furthermore, the positioning pin has left and right gaps in the width direction of the guide groove, and the size of the left and right gaps is 0.5mm-1.5mm. On the basis of ensuring that the pin shaft can move left and right in the width direction of the guide groove, it will not rotate too much around its own axis, thereby ensuring the stability of its linear motion.

[0010] Furthermore, there is a height gap between the end of the locating pin and the bottom of the guide groove, the height gap is 2mm-5mm, and the depth of the guide groove is greater than 5mm. A certain gap is maintained to prevent friction and does not affect the sliding of the pin shaft in the swing frame.

[0011] Furthermore, the mounting hole is a threaded hole, and the positioning pin is a bolt, and the threaded mounting method facilitates its fixation.

[0012] By adopting the above technical solution, the utility model has the following beneficial effects:

[0013] (1) A guide groove is provided on the outer wall of the pin shaft, and a positioning pin corresponding to the guide groove is provided on the swing frame. The positioning pin is slidably arranged in the guide groove to limit the problem of excessive rotation of the pin shaft along its radial direction. The structure is simple and easy to operate, which greatly reduces the difficulty of manual operation;

[0014] (2) The length of the guide groove is greater than the stroke of the pin in the swing frame and does not affect its normal working range;

[0015] (3) The positioning pin is in the guide groove, and there is a certain gap between the bottom wall and the side wall of the guide groove to prevent affecting its normal operation;

[0016] (4) The mounting holes on the swing frame are threaded holes and the positioning pins are bolts to facilitate its fixation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to specific embodiments and in conjunction with the accompanying drawings.

[0018] Figure 1 It is a cross-sectional view of the pin pulling device for a motor grader in the utility model;

[0019] Figure 2 for Figure 1 The structural diagram of the middle A direction;

[0020] Figure 3 It is a cross-sectional view of the pin pulling device of the grader with the guide device in the utility model;

[0021] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0022] Figure 5 It is a top view of the positioning pin in the guide groove of the utility model;

[0023] Figure 6 for Figure 5 Enlarged view of point A in the middle.

[0024] The numbers in the attached drawings are: 1 frame; 2 swing frame; 3 pin shaft; 3-1 guide angle; 3-2 pin shaft rotation axis; 3-3 pin shaft rotation center; 4 guide groove; 5 positioning pin; 6 mounting hole; 7 left and right gap; 8 height gap; 9 sleeve. DETAILED DESCRIPTION

[0025] Example:

[0026] like Figure 3 As shown, this embodiment provides a guide device for pulling out pins of a grader, comprising a frame 1, a swing frame 2, and a pin 3. The pin 3 is installed in the swing frame 2, and the frame 1 and the swing frame 2 are connected through the pin 3; the outer wall of the pin 3 has a guide groove 4 arranged along the axial direction, and the swing frame 2 has a positioning pin 5 corresponding to the guide groove 4, and the positioning pin 5 is slidably arranged in the guide groove 4. In this scheme, the guide groove 4 is arranged on the outer peripheral wall of the pin 3, and is arranged along the axial direction of the pin 3, which does not affect the sliding of the pin 3 in the swing frame 2. The swing frame 2 is provided with a positioning pin 5 corresponding to the guide groove 4. With the positioning pin 5 slidably arranged in the guide groove 4, the pin 3 can slide along its axial direction, but it will not rotate too much, ensuring that the guide angle 3-1 at the front end of the pin 3 can be accurately inserted into the positioning hole on the frame 1, solving the problem that the pin 3 rotates too much and is difficult to be positioned and installed with the frame 1. The structure is simple, easy to implement, and brings great convenience to the operator.

[0027] Preferably, the swing frame 2 is provided with a mounting hole 6 which is perpendicular to the guide groove 4, and the positioning pin 5 is installed in the mounting hole 6. After the mounting hole 6 and the guide groove 4 are positioned correspondingly, the positioning pin 5 can be inserted, which is convenient for installation.

[0028] Preferably, the length of the guide groove 4 is greater than the stroke of the pin 3 in the swing frame 2, which is beneficial for maximizing the sliding distance of the pin 3 in the swing frame 2 without affecting its normal operation.

[0029] Preferably, the mounting hole 6 is a threaded hole, and the positioning pin 5 is a bolt, and the threaded mounting method facilitates its fixation.

[0030] like Figure 4 As shown, there is a height gap 8 between the end of the positioning pin 5 and the bottom of the guide groove 4, and the height gap 8 is 2mm-5mm in size. The depth of the guide groove 4 is greater than 5mm, and a certain gap is maintained to prevent friction and not affect the sliding of the pin shaft 3 in the swing frame 2.

[0031] like Figure 5 and Figure 6 As shown, the positioning pin 5 has a left and right gap 7 in the width direction of the guide groove 4, and the size of the left and right gap 7 is 0.5mm-1.5mm. On the basis of ensuring that the pin shaft 3 can move left and right in the width direction of the guide groove 4, it will not rotate too much around its own axis, thereby ensuring the stability of its linear motion.

[0032] Preferably, a sleeve 9 is installed outside the pin shaft 3, and the pin shaft 3 rotates along its pin shaft rotation axis 3-2, corresponding to Figure 2 The pin rotation center is 3-3.

[0033] Working principle: A guide groove 4 is set along the axial direction of the pin shaft 3 on the outer peripheral side wall, and the length of the guide groove 4 is greater than the stroke of the pin shaft 3 in the swing frame 2, so as not to affect its normal sliding; when the guide pin installed in the mounting hole 6 of the swing frame 2 extends into the guide groove 4, the rotation of the pin shaft 3 itself is restricted, ensuring that the guide angle 3-1 at the front end of the pin shaft 3 can be accurately inserted into the positioning hole on the frame 1, thereby completing the connection and fixation of the swing frame 2 and the frame 1.

[0034] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A guide device for pulling out a pin of a grader, characterized in that: The invention comprises a vehicle frame (1), a swing frame (2), and a pin shaft (3); the pin shaft (3) is installed in the swing frame (2); the vehicle frame (1) and the swing frame (2) are connected via the pin shaft (3); the outer wall of the pin shaft (3) is provided with a guide groove (4) arranged along the axial direction; the swing frame (2) is provided with a positioning pin (5) corresponding to the guide groove (4); the positioning pin (5) is slidably arranged in the guide groove (4).

2. A guide device for pulling out pins in a motor grader according to claim 1, characterized in that: The swing frame (2) is provided with a mounting hole (6) which is perpendicular to the guide groove (4), and the positioning pin (5) is installed in the mounting hole (6).

3. A guide device for pulling out pins in a motor grader according to claim 1, characterized in that: The length of the guide groove (4) is greater than the stroke of the pin shaft (3) in the swing frame (2).

4. The guide device for pulling out pins in a motor grader according to claim 1, characterized in that: The positioning pin (5) has a left-right gap (7) in the width direction of the guide groove (4), and the size of the left-right gap (7) is 0.5 mm-1.5 mm.

5. The guide device for pulling out pins in a motor grader according to claim 1, characterized in that: There is a height gap (8) between the end of the positioning pin (5) and the bottom of the guide groove (4), and the size of the height gap (8) is 2mm-5mm.

6. A guide device for pulling out pins in a motor grader according to claim 2, characterized in that: The mounting hole (6) is a threaded hole, and the positioning pin (5) is a bolt.

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