Angle adjusting mechanism for drilling

Abstract

The utility model relates to the technical field of drilling equipment, and discloses an angle adjusting mechanism for drilling, which comprises a positioning tool and an adjusting unit, the positioning tool is rotatably connected to a frame, both ends of the positioning tool are provided with positioning holes, positioning pins are mounted in the positioning holes, and the positioning hole at any end is of a porous communication structure; the adjusting unit is used for adjusting the rotating angle of the positioning tool and located below the positioning tool. In practical application, automatic drilling of gear shifting arms of multiple models is achieved through cooperation of the positioning tool and the adjusting unit, and the machining efficiency and the product quality consistency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling equipment, in particular to an angle adjustment mechanism for drilling. Background Art

[0002] The shift arm is a crucial component of a motorcycle's speed-shifting system, connecting the shift lever to the transmission. To change gears, the rider presses their foot on the lever, which moves upward or downward, corresponding to upshifting and downshifting, respectively. This movement is transmitted through the shift arm to the transmission, enabling the shift. To ensure that the shift arm and lever return to their initial positions after each shift, a return spring is connected between them, necessitating holes in the shift arm and lever.

[0003] However, since the shift arm is a non-standard part, different motorcycles are equipped with different models of shift arms, as shown in the attached Figure 1 The different inclinations of the drilling surfaces shown result in different processing angles of the spring hanging holes on the shift arm. During the existing drilling process of the shift arm, due to the irregular shape of the shift arm, special fixtures need to be designed for different models of workpieces, which results in high fixture costs and high production costs, resulting in low economic benefits. Moreover, due to the small batch processing volume of a single model, the processing of different models of products requires frequent manual replacement of fixtures and adjustment of equipment, resulting in low processing efficiency. In addition, frequent adjustments make it difficult to ensure processing accuracy, affecting processing quality. Utility Model Content

[0004] The utility model aims to provide an angle adjustment mechanism for drilling, so as to improve the drilling efficiency and product quality of a shift arm.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical solution: an angle adjustment mechanism for drilling, including a positioning tool and an adjustment unit, the positioning tool is rotatably connected to the frame, both ends of the positioning tool are provided with positioning holes, positioning pins are installed in the positioning holes, and the positioning holes at either end are a multi-porous connected structure; the adjustment unit is used to adjust the rotation angle of the positioning tool and is located below the positioning tool.

[0006] The principles and advantages of this solution are:

[0007] 1. In actual application, the hole on the shift arm is aligned with the positioning pin to fix the shift arm on the positioning fixture, and then the adjustment unit lifts one end of the positioning fixture upward. The positioning fixture drives the workpiece on it to rotate around the frame until the drilling surface of the shift arm is level, so as to carry out subsequent drilling processing; the drilling surface of different types of shift arms has different bevel angles. This solution adjusts the angle of the shift arm by adjusting the rotation angle of the positioning fixture to keep its drilling surface level. In this way, the shift arm of non-standard parts can realize standardized and automated processing flow, reduce the frequency of fixture replacement and equipment adjustment frequency, and effectively improve production efficiency and processing quality.

[0008] 2. The positioning hole at one end of the positioning fixture is a multi-hole interconnected structure. The position of the positioning pin at the movable end can be determined according to the actual shift arm model, ensuring that multiple types of shift arms can be fixed on the positioning fixture, realizing unified clamping and automated processing of multiple products, reducing the types of fixtures, reducing fixture costs and production costs; at the same time, improving the versatility of the equipment and effectively improving the processing efficiency and quality of the products.

[0009] 3. The adjustment mechanism of this solution realizes the adjustment and fixation of the drilling surface of different types of shift arms. Compared with traditional manual adjustment equipment that relies on the experience and proficiency of the operator, this solution reduces the influence of human factors, so that key indicators such as hole consistency and surface roughness can be effectively guaranteed, thereby improving product reliability and service life, and reducing scrap rate and rework rate, thereby reducing production costs.

[0010] Furthermore, it also includes a limiting unit, which is located above the positioning tooling.

[0011] The limit unit fixes the shift arm on the positioning tool from above and cooperates with the positioning pin to achieve doubly fixed shift arm, effectively preventing unnecessary movement and vibration of the shift arm during high-speed drilling, helping to improve drilling accuracy, ensure that the position of each drilled hole meets the design requirements, and reduce scrap rate.

[0012] Furthermore, the limiting unit is connected to the frame in a transverse sliding manner.

[0013] The above arrangement enables the limiting unit to adjust the position of different types of shift arm workpieces, ensuring that each type of workpiece can be effectively fixed and enhancing the versatility of the mechanism.

[0014] Furthermore, the adjustment unit includes a lifting cylinder and a lifting head fixed to the end of the output shaft of the lifting cylinder, and the end of the lifting head is arc-shaped.

[0015] The above setting is intended to, firstly, make the pressure between the jacking head and the positioning tooling more evenly, avoid the stress concentration on the surface of the positioning tooling and cracks caused by the traditional flat or sharp-shaped jacking head, and extend the service life of the tooling; secondly, the arc-shaped jacking head provides a larger contact area, making the jacking process more stable, better supporting the shift arm, ensuring that it remains stable during rotation, thereby improving the accuracy and consistency of drilling.

[0016] Furthermore, a first rolling bearing is provided on the lifting head, the axis of the first rolling bearing is perpendicular to the movement direction of the lifting head, and the plane where the vertex of the first rolling bearing is located is higher than the vertex plane of the lifting head.

[0017] The above arrangement converts the sliding friction between the lifting head and the positioning fixture into rolling friction between the first rolling bearing and the positioning fixture, reducing friction loss and improving the response speed and service life of the mechanism.

[0018] Furthermore, the top end of the positioning pin is tapered.

[0019] The top of the locating pin is designed to be conical. One reason is to adapt to various types of shift arms and improve the versatility of the positioning tooling. The other reason is to reduce the positioning accuracy requirements between the workpiece and the positioning tooling. The conical design can increase the speed of workpiece clamping and thus improve processing efficiency.

[0020] Furthermore, a rotation hole is formed at the fixed end of the positioning fixture, and a second rolling bearing is provided in the rotation hole.

[0021] The second rolling bearing avoids direct contact between the positioning fixture and the frame, reducing friction loss between the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural diagram of a certain model of shift arm.

[0023] Figure 2 It is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0024] Figure 3 It is a partially enlarged view of an embodiment of the present utility model.

[0025] Figure 4 Schematic diagram of the coordination between the positioning fixture and the adjustment unit. DETAILED DESCRIPTION

[0026] The following is further described in detail through specific implementation methods:

[0027] The figure marks in the drawings of the specification include: shift arm 100, drilling equipment 200, frame 1, rotating shaft 11, positioning tool 2, fixed end 21, movable end 22, positioning hole 23, positioning pin 24, adjustment unit 3, lifting cylinder 31, lifting head 32, limit unit 4, sliding base 41, limit block 42, limit head 43, first rolling bearing 5, and second rolling bearing 6.

[0028] The embodiment is basically as shown in the attached Figure 2-4 As shown: A drilling angle adjustment mechanism includes a positioning tool 2 and an adjustment unit 3. The two ends of the positioning tool 2 are respectively a fixed end 21 and a movable end 22. A rotating shaft 11 is provided on the frame 1. The fixed end 21 of the positioning tool 2 is provided with a rotating hole. The positioning tool 2 is rotatably connected to the frame 1 through the cooperation of the rotating shaft 11 and the rotating hole. A second rolling bearing 6 is installed in the rotating hole to reduce the friction loss caused by direct contact between the positioning tool 2 and the frame 1; positioning holes 23 are provided at both ends of the positioning tool 2, and positioning pins 24 are installed in the positioning holes 23. The positioning holes 23 at either end are a porous connected structure. In the embodiment, the positioning hole 23 located at the movable end 22 is a multi-porous connected structure, so that the position of the positioning pin 24 of the movable end 22 can be determined according to the actual model of the shift arm 100, ensuring that multiple models of shift arms 100 can be fixed on the positioning tool 2, realizing unified clamping and automated processing of multiple products, and improving the versatility of the equipment; the top end of the positioning pin 24 is conical, one is to adapt to multiple models of shift arms 100 and improve the versatility of the positioning tool 2, and the other is to reduce the positioning accuracy requirements between the workpiece and the positioning tool 2. The conical design can increase the speed of workpiece clamping, thereby improving processing efficiency.

[0029] like Figure 3 、 Figure 4 As shown in the figure, the adjustment unit 3 is located below the positioning tool 2. The adjustment unit 3 includes a lifting cylinder 31 and a lifting head 32. The lifting cylinder 31 is fixed on the frame 1, and the lifting head 32 is fixed on the output shaft end of the lifting cylinder 31. The lifting cylinder 31 is driven to move upward to lift the movable end 22 of the positioning tool 2, so that the positioning tool 2 and the shift arm 100 workpiece thereon rotate around the rotating shaft 11, so that the drilling surface on the shift arm 100 is horizontal, and the rotation tilt angle can be adjusted according to different models of shift arms 100, so as to realize the automation and standardization of spring hanging holes and improve the drilling processing efficiency and drilling quality; wherein, the end of the lifting head 32 is designed to be an arc shape, and the arc-shaped structure can increase the contact area between the lifting head 32 and the positioning tool 2, so that the pressure between the two is more evenly distributed, better support the shift arm 100, and ensure that it remains stable during rotation, thereby improving the accuracy and consistency of drilling.

[0030] Preferably, a first rolling bearing 5 is installed on the lifting head 32, the axis of the first rolling bearing 5 is perpendicular to the movement direction of the lifting head 32, and the vertex plane of the first rolling bearing 5 is higher than the vertex plane of the lifting head 32, so that the sliding friction between the lifting head 32 and the positioning tooling 2 is converted into rolling friction between the first rolling bearing 5 and the positioning tooling 2, reducing friction loss and improving the response speed and service life of the mechanism.

[0031] Preferably, a limiting unit 4 is provided above the positioning tool 2, such as Figure 3 As shown, the limiting unit 4 includes an inverted L-shaped limiting block 42 and a sliding base 41. A strip-shaped sliding hole is opened on the frame 1. A limiting head 43 is installed on the top of the limiting block 42. The bottom of the limiting block 42 is fixed to the sliding base 41 and slides horizontally in the strip-shaped sliding hole of the frame 1 through the sliding base 41. The limiting unit 4 fixes the shift arm 100 on the positioning fixture 2 from above and cooperates with the positioning pin 24 to achieve dual fixation of the shift arm 100, effectively preventing unnecessary movement and vibration of the shift arm 100 during high-speed drilling, helping to improve drilling accuracy, ensure that the position of each drilled hole meets the design requirements, and reduce the scrap rate. At the same time, the lateral sliding of the limiting unit 4 can adjust the position of the shift arm 100 workpiece of different models, ensuring that each model of workpiece can be effectively fixed and enhancing the versatility of the mechanism.

[0032] The specific implementation process is as follows:

[0033] like Figure 1 The figure shows a schematic structural diagram of a certain type of shift arm 100. The shift arm 100 has a large and a small circular hole at both ends. The large circular hole is used to connect with the shift shaft, and the end where the small circular hole is located is the drilling surface of the spring hanging hole.

[0034] like Figure 2 As shown, during the specific operation, the rotation angle of the positioning tool 2 is determined in advance according to the model of the shift arm 100 and the inclination angle of its drilling surface, and then the upward movement distance of the jacking cylinder 31 is determined; then the circular hole on the shift arm 100 is aligned and sleeved on the positioning pin 24 to complete the workpiece clamping, and then, the jacking cylinder 31 is started to drive the jacking head 32 to lift the movable end 22 of the positioning tool 2 upward, so that the positioning tool 2 and the shift arm 100 thereon rotate around the rotating shaft 11 until the drilling surface of the shift arm 100 is horizontal, and then the drilling equipment 200 is started to perform drilling processing. After the drilling processing is completed, the jacking cylinder 31 returns to reset, and the positioning tool 2 drives the shift arm 100 to reset under the action of gravity.

[0035] The above description is merely an embodiment of the present invention, and the commonly known specific technical solutions and / or features of the solution are not described in detail here. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several variations and improvements can be made, which should also be considered as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection claimed in this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A drilling angle adjustment mechanism, characterized in that: It includes a positioning tool and an adjustment unit. The positioning tool is rotatably connected to the frame. Positioning holes are opened at both ends of the positioning tool. Positioning pins are installed in the positioning holes, and the positioning holes at either end are multi-porous connected structures; the adjustment unit is used to adjust the rotation angle of the positioning tool and is located below the positioning tool.

2. The drilling angle adjustment mechanism according to claim 1, characterized in that: It also includes a limiting unit, which is located above the positioning tooling.

3. The drilling angle adjustment mechanism according to claim 2, characterized in that: The limiting unit is connected to the frame in a transverse sliding manner.

4. The drilling angle adjustment mechanism according to claim 3, characterized in that: The adjusting unit comprises a lifting cylinder and a lifting head fixed on the end of an output shaft of the lifting cylinder, and the end of the lifting head is arc-shaped.

5. The drilling angle adjustment mechanism according to claim 4, characterized in that: The jacking head is provided with a first rolling bearing, the axis of the first rolling bearing is perpendicular to the movement direction of the jacking head, and the plane where the vertex of the first rolling bearing is located is higher than the vertex plane of the jacking head.

6. The drilling angle adjustment mechanism according to claim 5, characterized in that: The top end of the positioning pin is tapered.

7. The drilling angle adjustment mechanism according to claim 6, characterized in that: A rotation hole is formed at the fixed end of the positioning fixture, and a second rolling bearing is arranged in the rotation hole.

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