Sample punch for spline shaft

Abstract

The utility model discloses a sample punch for a spline shaft, which relates to the technical field of machining, and comprises a fixing structure, a driving device, a punch structure, a guide rod and a guide cylinder, the driving end of the driving device is connected to the punch structure; the fixing structure fixes the spline shaft; the guide rod is mounted on the punch structure; the guide cylinder is installed on the fixing structure. A guide hole is formed in the side, facing the guide rod, of the guide cylinder. The guide rods can be correspondingly inserted into the guide holes, and the guide rods and the guide holes are coaxially arranged; the axial direction of the guide rod is the same as the movement direction of the punch structure; and when the punch structure is in contact with the spline shaft, the guide rod is inserted into the guide hole. According to the sample punch for the spline shaft, the guide cylinder and the guide rod are arranged on the fixing structure and the punch structure respectively, the guide rod is inserted into the guide cylinder to limit the moving direction of the punch structure, and the position precision of punching holes is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, and in particular to a center punch for a spline shaft. Background Technology

[0002] A center punch is a common tool used in benchwork, mechanical drilling, and other operations. It is primarily used to pre-drill small holes at the desired drilling locations as markings and positioning references, preventing inaccurate drilling positions. It can also be used to drill small holes along scribe lines to prevent them from being erased. A center punch is typically shaped like a small drill bit or awl, with a slender, elongated form, a sharp head, and a generally flat or slightly curved tail for easy gripping and striking. Center punches are mostly made of high-carbon steel and undergo quenching treatment, giving the punch high hardness and wear resistance, enabling it to punch clear marking holes on workpieces made of various materials.

[0003] When using a center punch, first clean the surface of the workpiece to be drilled, ensuring it is free of oil, impurities, etc. Then, scribing lines according to requirements to determine the location and shape of the hole. Align the tip of the center punch with the intersection of the scribing lines or the location where the hole needs to be punched. Control the striking force according to the properties and thickness of the workpiece material to ensure accurate punching.

[0004] Chinese utility model patent application number 202222890922.7 discloses a punching device for steel plates. This patent only fixes the punch rod by hand, and the punch rod strikes the steel plate through the elastic force of a spring, which will produce large vibrations and positional errors, making it impossible to accurately locate the punching position, resulting in a decrease in the accuracy of subsequent drilling positions. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a punch for a spline shaft, which is provided with a guide cylinder and a guide rod on the fixed structure and the punch structure respectively. When the punch structure moves toward the spline shaft on the fixed structure, the guide rod is inserted into the guide cylinder to limit the movement direction of the punch structure, thereby effectively improving the positional accuracy of the punch.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] This utility model provides a punch for a splined shaft, comprising a fixed structure, a driving device, a punch structure, a guide rod, and a guide cylinder, wherein: the fixed structure and the driving device are arranged opposite each other and their relative positions are fixed; the driving device has a retractable driving end, which is connected to the punch structure; the fixed structure is used to fix the splined shaft; the driving device is used to drive the punch structure to move toward the fixed structure, so that the punch structure impacts the splined shaft and punches a hole; the guide rod is installed on the punch structure; the guide cylinder is installed on the fixed structure, and a guide hole is opened on the side of the guide cylinder facing the guide rod; the guide rod and the guide cylinder are arranged opposite each other, and the guide rod can be inserted into the guide hole accordingly, and the guide rod and the guide hole are coaxial; the axial direction of the guide rod is in the same direction as the movement direction of the punch structure; when the punch structure contacts the splined shaft, the guide rod is inserted into the guide hole.

[0008] The present invention provides a punch for a spline shaft. Preferably, the punch structure includes a punch rod and a mounting block; the mounting block is mounted on the drive end of the drive device; the punch rod is mounted on the side of the mounting block facing the fixed structure; the punch end of the punch rod corresponds to the punching position of the spline shaft.

[0009] The present invention provides a center punch for a spline shaft. Preferably, the mounting block is provided with a mounting plate; the mounting plate is mounted on one side of the mounting block in the horizontal direction; one end of the guide rod is mounted on the mounting plate.

[0010] The present invention provides a punch for a spline shaft. Preferably, the punch structure further includes a self-inspection structure. The self-inspection structure includes a first detection ring, a second detection ring, and a connecting piece. The first detection ring is fitted and sleeved on the axial side of the punch rod. The second detection ring is fitted and sleeved on the axial side of the guide rod. The connecting piece fixes the first detection ring and the second detection ring together.

[0011] The present invention provides a punch for a spline shaft. Preferably, the top of the fixed structure is provided with a fixing groove, and the side of the fixing groove facing the punch structure is set as a slot. The spline shaft is placed in the fixing groove, and the end of the spline shaft that needs to be punched extends outward through the slot and is aligned with the punch structure.

[0012] The present invention provides a center punch for a spline shaft. Preferably, the guide cylinder is a sleeve structure; the guide cylinder and the guide rod are coaxially corresponding; the guide hole is opened along the axial direction of the guide cylinder; a spring is arranged inside the guide hole along the axial direction; one end of the spring is fixedly connected to the bottom of the guide hole; the other end of the spring corresponds to the guide rod.

[0013] The above technical solution has the following advantages or beneficial effects: This utility model provides a punch for a spline shaft, relating to the field of machining technology, including a fixed structure, a driving device, a punch structure, a guide rod, and a guide cylinder, wherein: the fixed structure and the driving device are arranged opposite each other and their relative positions are fixed; the driving device is provided with a retractable driving end, which is connected to the punch structure; the fixed structure is used to fix the spline shaft; the driving device is used to drive the punch structure to move toward the fixed structure, so that the punch structure impacts the spline shaft and punches a hole; the guide rod is installed on the punch structure; the guide cylinder is installed on the fixed structure, and a guide hole is opened on the side of the guide cylinder facing the guide rod; the guide rod and the guide cylinder are arranged opposite each other, and the guide rod can be inserted into the guide hole accordingly, and the guide rod and the guide hole are coaxially arranged; the axial direction of the guide rod is in the same direction as the movement direction of the punch structure; when the punch structure contacts the spline shaft, the guide rod is inserted into the guide hole. This utility model provides a punch for a spline shaft, which is provided with a guide cylinder and a guide rod on the fixed structure and the punch structure, respectively. When the punch structure moves toward the spline shaft on the fixed structure, the guide rod is inserted into the guide cylinder to limit the movement direction of the punch structure, which effectively improves the positional accuracy of the punch. Attached Figure Description

[0014] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0015] Figure 1 An overall structural diagram of a punch for a spline shaft provided in Embodiment 1 of this utility model;

[0016] Figure 2 This is a cross-sectional view of the guide cylinder of a center punch for a spline shaft provided in Embodiment 1 of this utility model;

[0017] Figure 1-2 Includes: 1. Fixed structure; 11. Fixed groove; 2. Drive device; 3. Punch rod; 31. Mounting block; 32. Mounting plate; 33. First detection ring; 34. Second detection ring; 35. Connecting piece; 4. Guide rod; 5. Guide cylinder; 51. Guide hole; 52. Spring; 6. Splined shaft. Detailed Implementation

[0018] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0019] Example 1:

[0020] like Figure 1-2 As shown:

[0021] To improve the positioning accuracy of the punch eye, this utility model provides a punch for a splined shaft, including a fixed structure 1, a driving device 2, a punch structure, a guide rod 4, and a guide cylinder 5, wherein: the fixed structure 1 and the driving device 2 are arranged opposite each other and their relative positions are fixed; the driving device 2 has a retractable driving end, which is connected to the punch structure; the fixed structure 1 is used to fix the splined shaft 6; the driving device 2 is used to drive the punch structure to move toward the fixed structure 1, so that the punch structure impacts the splined shaft 6 and punches the hole; the guide rod 4 is installed on the punch structure; the guide cylinder 5 is installed on the fixed structure 1, and a guide hole 51 is opened on the side of the guide cylinder 5 facing the guide rod 4; the guide rod 4 and the guide cylinder 5 are arranged opposite each other, and the guide rod 4 can be inserted into the guide hole 51 accordingly, and the guide rod 4 and the guide hole 51 are coaxially arranged; the axial direction of the guide rod 4 is in the same direction as the movement direction of the punch structure; when the punch structure contacts the splined shaft 6, the guide rod 4 is inserted into the guide hole 51.

[0022] The fixing structure 1 and the driving device 2 can be fixed on a base plate, with the spline shaft 6 placed inside the fixing structure 1. The fixing structure 1 can limit the spline shaft 6 only in the punching direction, or it can be equipped with clamps to completely fix the spline shaft 6. The guide rod 4 moves with the punch structure. Therefore, as the punch structure moves, the guide rod 4 inserts into or moves within the guide hole 51. Through the limiting effect of the guide hole 51 and the guide rod 4, the punch structure can always move along a predetermined axial direction. The guide rod 4 can be inserted into the guide hole 51 throughout its entire movement, or it can be inserted into the guide hole 51 during the punching process when the punch structure contacts the spline shaft 6. If the guide rod 4 is inserted into the guide hole 51 throughout its entire movement, the punch structure is guided by the guide rod 4 throughout the entire movement. If the guide rod 4 is not inserted into the guide hole 51 throughout its entire movement, the guide rod 4 is initially outside the guide hole 51. As the punch structure approaches the spline shaft 6, the guide rod 4 also moves toward the guide hole 51. Before the punch structure contacts the splined shaft 6, the guide rod 4 must first enter the guide hole 51 to provide limiting guidance for the punch structure. The difference between the outer diameter of the guide rod 4 and the inner diameter of the guide hole 51 should be less than 0.1 mm to ensure the movement accuracy of the punch structure.

[0023] This utility model provides a punch for a spline shaft. Guide cylinders 5 and guide rods 4 are respectively provided on the fixed structure 1 and the punch structure. When the punch structure moves toward the spline shaft 6 on the fixed structure 1, the guide rod 4 is inserted into the guide cylinder 5 to limit the movement direction of the punch structure, effectively improving the positional accuracy of the punch.

[0024] To achieve the installation and fixation of the punch structure and the fixed structure 1, in a preferred embodiment, the punch structure includes a punch rod 3 and a mounting block 31. The mounting block 31 is mounted on the drive end of the drive device 2; the punch rod 3 is mounted on the side of the mounting block 31 facing the fixed structure 1; the punch end of the punch rod 3 corresponds to the punching position of the spline shaft 6. The drive device 2 is preferably a cylinder, which fixes the mounting block 31 on the telescopic end of the cylinder, and then fixes the punch rod 3 to the mounting block 31. Before punching, position adjustment is required to ensure that the top of the punch rod 3 is aligned with the designated punching position of the spline shaft 6.

[0025] To ensure that the guide rod 4 moves synchronously and in the same direction as the punch rod 3, in a preferred embodiment, the mounting block 31 is provided with a mounting plate 32. The mounting plate 32 is mounted on one side of the mounting block 31 in the horizontal direction; one end of the guide rod 4 is mounted on the mounting plate 32. The guide rod 4 and the punch rod 3 are arranged in the same direction, and the guide rod 4 and the punch rod 3 are connected together by the mounting plate 32 and the mounting block 31, so that the guide rod 4 can move synchronously and in the same direction as the punch rod 3. With the above structure, it can be ensured that the movement direction of the punch rod 3 is consistent with that of the guide rod 4. By limiting the guide rod 4, the punch rod 3 can be guided, so that the punch rod 3 is accurately aligned with the designated punching position.

[0026] This utility model provides a center punch for a spline shaft. By fixing the guide rod 4 to the punch rod 3 and then guiding the guide rod 4, the punch rod 3 can be accurately aligned with the designated punch position.

[0027] To ensure the coaxiality of the guide rod 4 and the punch rod 3 before punching, thus guaranteeing the accuracy of the punching, in a preferred embodiment, the punch structure further includes a self-checking structure. The self-checking structure includes a first detection ring 33, a second detection ring 34, and a connecting piece 35. The first detection ring 33 is fitted onto the axial side of the punch rod 3; the second detection ring 34 is fitted onto the axial side of the guide rod 4; and the connecting piece 35 securely connects the first detection ring 33 and the second detection ring 34. During self-checking, moving the connecting piece 35 causes the first detection ring 33 and the second detection ring 34 to move along the guide rod 4 and the punch rod 3, respectively. If the guide rod 4 and the punch rod 3 deform, resulting in axial misalignment, a damping effect will occur, specifically manifested as the first detection ring 33 or the second detection ring 34 not moving smoothly on the guide rod 4 or the punch rod 3. At this point, it can be determined that the axial misalignment of the guide rod 4 and the punch rod 3 is in place, and punching needs to be stopped and adjusted.

[0028] This invention provides a punch for a spline shaft. By setting a self-checking structure, it can detect whether the axial direction of the guide rod 4 and the punch rod 3 is consistent, so as to ensure the accuracy of punching the hole in the punch rod 3.

[0029] In a preferred embodiment, the top of the fixing structure 1 is provided with a fixing groove 11, and the side of the fixing groove 11 facing the punch structure is set as a slot; the spline shaft 6 is placed in the fixing groove 11, and the end of the spline shaft 6 that needs to be punched extends outward through the slot and is aligned with the punch structure.

[0030] Because the punch 3 vibrates when it impacts the spline shaft 6, this vibration may cause the device to deform. To reduce the negative impact of vibration, in a preferred embodiment, the guide cylinder 5 is a sleeve structure; the guide cylinder 5 and the guide rod 4 are coaxially corresponding; the guide hole 51 is opened along the axial direction of the guide cylinder 5; a spring 52 is provided inside the guide hole 51 along the axial direction; one end of the spring 52 is fixedly connected to the bottom of the guide hole 51; the other end of the spring 52 corresponds to the guide rod 4.

[0031] Once the guide rod 4 enters the guide hole 51, it will be continuously subjected to the elastic force of the spring 52. The deeper the guide rod 4 enters the guide hole 51, the greater the elastic force. The buffering elastic effect of the spring 52 on the guide rod 4 can be simultaneously applied to the punch rod 3, thereby reducing the vibration force fed back to the punch rod 3 due to the impact, so as to avoid structural deformation and inaccuracy.

[0032] This utility model provides a punch for a spline shaft. By setting a spring 52 in the guide hole 51, the buffering elastic effect generated on the guide rod 4 can be simultaneously applied to the punch rod 3, thereby reducing the vibration force fed back to the punch rod 3 due to the impact, so as to avoid structural deformation and inaccuracy.

[0033] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application filed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not claimed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the appended claims.

[0034] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A center punch for a splined shaft, characterized in that, It includes a fixed structure, a drive unit, a punch structure, a guide rod, and a guide cylinder, wherein: The fixed structure is arranged opposite to the driving device and its relative position is fixed. The drive device is provided with a retractable drive end, and the drive end of the drive device is connected to the punch structure; The fixing structure is used to fix the spline shaft; The driving device is used to drive the punch structure to move toward the fixed structure, so that the punch structure strikes the spline shaft and punches a hole. The guide rod is mounted on the punch structure; The guide cylinder is installed on the fixed structure, and a guide hole is provided on the side of the guide cylinder facing the guide rod; The guide rod and the guide cylinder are arranged opposite each other, the guide rod can be inserted into the guide hole, and the guide rod and the guide hole are coaxially arranged; The axial direction of the guide rod is the same as the direction of movement of the punch structure; When the punch structure contacts the spline shaft, the guide rod is inserted into the guide hole.

2. A center punch for a splined shaft according to claim 1, characterized in that, The punch structure includes a punch rod and a mounting block; the mounting block is mounted on the drive end of the drive device; the punch rod is mounted on the side of the mounting block facing the fixed structure; the punch end of the punch rod corresponds to the punching position of the spline shaft.

3. A center punch for a splined shaft according to claim 2, characterized in that, The mounting block is provided with a mounting plate; the mounting plate is installed on one side of the mounting block in the horizontal direction; one end of the guide rod is installed on the mounting plate.

4. A center punch for a splined shaft according to claim 2, characterized in that, The punch structure also includes a self-inspection structure; the self-inspection structure includes a first detection ring, a second detection ring, and a connecting piece; the first detection ring is fitted and sleeved on the axial side of the punch rod; the second detection ring is fitted and sleeved on the axial side of the guide rod; the connecting piece fixes the first detection ring and the second detection ring together.

5. A center punch for a splined shaft according to claim 1, characterized in that, The top of the fixed structure is provided with a fixing groove, and the side of the fixing groove facing the punch structure is set as a slot; the spline shaft is placed in the fixing groove, and the end of the spline shaft that needs to be punched extends outward through the slot and is aligned with the punch structure.

6. A center punch for a splined shaft according to claim 1, characterized in that, The guide cylinder has a sleeve structure; the guide cylinder and the guide rod are coaxially corresponding; the guide hole is opened along the axial direction of the guide cylinder; a spring is arranged inside the guide hole along the axial direction; one end of the spring is fixedly connected to the bottom of the guide hole; the other end of the spring corresponds to the guide rod.

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