Pawl for gear shifting control mechanism

Abstract

The pawl for the gear shifting control mechanism comprises a cylinder, a spring guide column is arranged in a hole cavity of the opening end of the cylinder, two abrasion-resistant bosses and two curvature arc faces are evenly distributed on the outer side face of the other end of the cylinder in the circumferential direction, and the abrasion-resistant bosses and the curvature arc faces are arranged in a staggered mode. The bottom of the wear-resistant boss and the bottom of the curvature cambered surface end of the barrel body form an arc-shaped edge, and an anti-rotation groove is formed in the outer side face of the opening end of the barrel body; the pawl designed by the utility model can be tightly attached to the base of the control mechanism after the contact surface is increased, and the problems of abnormal sound and short service life are solved by adding anti-rotation and spring guide functions.

Description

Technical Field

[0001] The utility model belongs to the field of commercial vehicle shift operating mechanisms, in particular to a ratchet used on the shift operating mechanism. Background Art

[0002] The automobile gear shift control mechanism assembly is the main tool for the driver to issue instructions to the car.

[0003] The commercial vehicle shift mechanism is a set of mechanical transmission mechanisms composed of many parts. Its main working method is to tell the car the next gear logic through the driver's hand swinging forward, backward, left and right. Specifically, the driver pushes the shift handle, so that the pawl at the bottom of the shift lever moves forward, backward, left and right on the M-shaped track of the operating mechanism base, driving the bottom cable to move, realizing the shift function.

[0004] as follows Figure 1 The structure of the traditional pawl shown includes a cylinder 1, a cavity 2 at the open end of the cylinder is used to install a compression spring, and a curvature arc surface 3 is provided on the side of the other end of the cylinder; the technical problems existing in the traditional pawl are as follows: 1) There is no spring guide structure in the cavity of the traditional pawl, and the spring cannot maintain linear compression, which may cause the spring compression to tilt or abnormal thread noise; 2) The bottom of the traditional pawl is not wear-resistant. When shifting left and right, there is a friction problem between the bottom of the pawl and the edge of the base of the operating mechanism, which may cause the bottom to wear through and shorten the life of the pawl; 3) The bottom of the traditional pawl is a single-curvature contact surface, which makes the pawl and the base of the operating mechanism poorly fit when shifting gears, and does not have the function of eliminating abnormal noise; 4) The traditional pawl does not have an anti-rotation function. When shifting gears, the pawl may rotate inside the shift lever of the shift operating mechanism, causing abnormal noise. Utility Model Content

[0005] In view of the above technical problems, the utility model provides a pawl for a shift operating mechanism, which can effectively solve the technical problems of abnormal noise caused by the rotation of the pawl, abnormal noise caused by the spring, abnormal noise caused by friction between the pawl and the base, and poor wear resistance of the pawl when the shift operating mechanism moves.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: a pawl for a gear shift operating mechanism, including a cylinder, characterized in that: a spring guide column is provided in the hole cavity at the open end of the cylinder, and two wear-resistant bosses and two curvature arc surfaces are evenly distributed on the circumference of the outer surface of the other end of the cylinder, the wear-resistant bosses and the curvature arc surfaces are staggered, the bottom of the wear-resistant bosses and the bottom of the curvature arc surface end of the cylinder form an arc-shaped edge, and an anti-rotation groove is provided on the outer surface of the open end of the cylinder.

[0007] The above technical solution is further limited in that the cylinder, the spring guide column and the wear-resistant boss are an integral structure.

[0008] The above technical solution is further limited in that the cylinder, spring guide column and wear-resistant boss are made of PA66+30% GF material.

[0009] The above technical solution is further limited in that the wear-resistant boss has a thickness of 5 mm and a height of 4 mm.

[0010] Beneficial effects: 1) The design of the spring guide column prevents the compression spring from being twisted or tilted due to compression, which reduces the abnormal noise of the spring and improves the comfort of gear shifting; 2) The two curvature arc surfaces on the cylinder are combined into a double curvature arc surface, which makes the pawl fit better with the manipulator base; when shifting forward and backward or left and right, it ensures that the pawl is completely in a fit state on the manipulator base, so that the movement clearance of the pawl is eliminated, thereby solving the problem that the traditional pawl single curvature arc surface structure is only in a fit state during forward and backward movement, reducing the abnormal noise of gear shifting and improving the comfort of gear shifting. Adaptability; 3) The design of the wear-resistant boss. When shifting left or right, the arc-shaped edges of the wear-resistant boss and the cylinder on the pawl increase the contact area with the base of the manipulator, increase the service life of the pawl, and solve the problem of the traditional pawl being not wear-resistant; 4) The design of the anti-rotation groove prevents the pawl from rotating inside the shift lever when the shift lever swings, preventing the pawl from rotating and being unable to return to its position, while reducing the abnormal rotation noise of the pawl during shifting, and improving the driving quality; 5) The pawl combines multiple improvement functions in one, which can simply and effectively solve the problems of abnormal noise during gear selection and shifting, short service life and so on. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the traditional ratchet structure;

[0012] Figure 2 It is a schematic diagram of the structure of the utility model;

[0013] Figure 3 It is a front view of the new pawl;

[0014] Figure 4 yes Figure 3 Left view of

[0015] Figure 5 It is a usage status diagram of the utility model. DETAILED DESCRIPTION

[0016] A pawl for a shift operating mechanism, comprising a cylinder 1, a spring guide column 4 is arranged in a hole 2 at an open end of the cylinder, two wear-resistant bosses 5 and two curvature arc surfaces 3 are evenly distributed on the outer surface of the other end of the cylinder, the wear-resistant bosses and the curvature arc surfaces are arranged alternately, the bottom of the wear-resistant bosses and the bottom of the curvature arc surface end of the cylinder form an arc-shaped edge 6, and an anti-rotation groove 7 is arranged on the outer surface of the open end of the cylinder;

[0017] The cylinder, spring guide column and wear-resistant boss are an integral structure, which is convenient for production and helps to reduce production costs;

[0018] The cylinder, spring guide column and wear-resistant boss are made of PA66+30% GF material, which has good wear resistance and strong stability, and can effectively increase the service life;

[0019] The wear-resistant boss has a thickness of 5 mm and a height of 4 mm.

[0020] Assembly and use instructions: The wear-resistant anti-rotation pawl is installed inside the operating rod of the operating mechanism. During assembly, first install the spring 8 in the cavity of the pawl through the spring guide column, then insert the spring end of the pawl into the operating rod 9, and then assemble the operating rod as a whole with the operating device base 10, so that the curvature arc surface and arc-shaped edges of the pawl always fit the M-shaped shift surface on the operating device base, and finally press the cylindrical pin 11 into the operating rod. The cylindrical pin is located in the anti-rotation groove, so that the pawl is fixed to prevent it from rotating.

[0021] The pawl designed in the utility model is different from the traditional pawl in the following aspects: 1. A hyperbolic arc section is used instead of the traditional single curvature section at the contact point between the lower part of the pawl and the operating mechanism body, so that the pawl can better fit the operating mechanism body, reduce the friction resistance when shifting left and right, and prevent abnormal noise; 2. Two wear-resistant bosses are designed at the lower part of the pawl to increase the width of the pawl, so that when the operating mechanism shifts left and right to the extreme position, the contact point between the pawl and the operating mechanism body is larger, thereby preventing the problem of wear and tear of the lower part of the pawl and improving the service life; 3. A groove is designed at the upper part of the pawl, which is used in conjunction with a cylindrical pin to prevent the pawl from rotating inside the swing arm when shifting gears, thereby preventing rotation and abnormal noise; 4. A spring guide column is designed inside the pawl cavity to prevent the spring from being twisted or self-contacted to produce abnormal noise after tilting during use.

Claims

1. A pawl for a gear shift mechanism, comprising a cylinder, Features: A spring guide column is provided in the hole cavity at the open end of the cylinder, and two wear-resistant bosses and two curvature arc surfaces are evenly distributed on the circumference of the outer surface of the other end of the cylinder. The wear-resistant bosses and the curvature arc surfaces are staggered, and the bottom of the wear-resistant bosses and the bottom of the curvature arc surface end of the cylinder form an arc-shaped edge, and an anti-rotation groove is provided on the outer surface of the open end of the cylinder.

2. A pawl for a gear shift mechanism according to claim 1, Features: The cylinder, the spring guide column and the wear-resistant boss are an integral structure.

3. A pawl for a gear shift mechanism according to claim 1 or 2, Features: The cylinder, spring guide column and wear-resistant boss are made of PA66+30% GF material.

4. A pawl for a gear shift mechanism according to claim 3, Features: The wear-resistant boss has a thickness of 5 mm and a height of 4 mm.

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