Clamp pressing type slender shaft self-centering knurling tool

Abstract

The utility model relates to a clamp pressure type slender shaft self-centering knurling tool, which belongs to the field of knurling and comprises a fixed seat, a fixed arm fixedly connected to the front surface of the fixed seat, two knife rests rotationally connected to the front surface of the fixed seat, knurling wheels rotationally connected between the front side wall and the rear side wall in the knife rests, and a spring fixedly connected between the opposite sides of the two knife rests, the two tool rests are arranged on the left side and the right side of the front face of the fixing base correspondingly, and adjusting structures used for adjusting the knurling pressure are arranged on the opposite sides of the left tool rest and the right tool rest. According to the clamp pressure type slender shaft self-centering knurling tool, a hand wheel is manually rotated to drive a screw rod to rotate through an adjusting structure, then movement of a screw block and a connecting rod is accurately controlled, fine adjustment of the opening degree of a tool rest and a knurling wheel is achieved, the knurling pressure can be accurately set according to the machining requirement, and in addition, the machining efficiency is improved. A spring arranged in the tool enables the tool to automatically adapt to slender shafts with different diameters.

Description

Technical Field

[0001] This utility model relates to a clamping type self-centering knurling tool for slender shafts, belonging to the field of knurling. Background Technology

[0002] In the machining of slender shafts, knurling is a common surface treatment technique. It enhances the aesthetics, anti-slip properties, or functionality of the shaft by forming specific patterns or designs on its surface. However, traditional knurling fixtures often have many shortcomings, especially when processing slender shafts. Due to their large length-to-diameter ratio and poor rigidity, they are prone to vibration and deformation during machining, making it difficult to guarantee machining accuracy and surface quality.

[0003] To address these issues, improved knurling fixtures have emerged on the market, such as clamping knurling fixtures. These fixtures enhance the fixation of slender shafts by adding clamping mechanisms, thereby reducing vibration and deformation to some extent. However, these fixtures still have limitations, particularly in adjusting the knurling pressure. They cannot achieve precise control over the knurling pressure, resulting in significant variations in the depth and uniformity of the finished patterns. Furthermore, traditional knurling fixtures often lack self-centering functionality. When the diameter of the slender shaft changes, the fixture cannot automatically adapt and maintain a good knurling effect. This not only limits the applicability of the fixtures but also increases the difficulty and time cost of adjustments during the machining process. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the shortcomings of the existing technology, this utility model provides a clamping type self-centering knurling tool for slender shafts, which has the advantages of enhanced processing stability.

[0006] (II) Technical Solution

[0007] To achieve the aforementioned goal of enhancing processing stability, this utility model provides the following technical solution: a clamping type slender shaft self-centering knurling fixture, including a fixed base, a fixed arm fixedly connected to the front of the fixed base, two tool holders rotatably connected to the front of the fixed base, a knurling wheel rotatably connected between the front and rear side walls of the tool holders, and a spring fixedly connected between the opposite sides of the two tool holders. The two tool holders are respectively arranged on the left side and the right side of the front of the fixed base. The opposite sides of the left and right tool holders are provided with an adjustment structure for adjusting the knurling pressure.

[0008] The adjustment structure includes a frame arranged on opposite sides of the left and right tool holders, a screw rod rotatably connected to the inner wall of the frame, a handwheel fixedly connected to the other end of the screw rod, a screw block threadedly connected to the outside of the screw rod, a connecting rod fixedly connected to the opposite side wall of the screw blocks on the left and right sides, a hinge block fixedly connected to the opposite end of the connecting rod on the left and right sides, and a hinge seat hinged to the outside of the hinge block.

[0009] Furthermore, the inner side of the fixing arm is provided with a screw pre-set hole, and the fixing arm is fixedly connected to the fixing seat by screws.

[0010] Furthermore, a rotating hole is provided on the inner side of the tool holder, and a short shaft is fixedly connected to the inner side of the rotating hole. One end of the back of the short shaft is fixedly connected to the fixed seat.

[0011] Furthermore, the hinge block is hinged between the inner front and rear side walls of the hinge seat, the left hinge seat is fixedly connected to the left side wall of the left tool holder, and the right hinge seat is fixedly connected to the right side wall of the right tool holder.

[0012] Furthermore, the screw on the left is rotatably connected to the inner right side wall of the left frame, and the screw on the right is rotatably connected to the inner left side wall of the right frame.

[0013] Furthermore, there are four connecting rods on both the left and right sides, with the four connecting rods on the left side being fixedly connected to the four corners of the right side wall of the left screw block, and the four connecting rods on the right side being fixedly connected to the four corners of the left side wall of the right screw block.

[0014] Furthermore, the four corners of the right side wall of the left frame are respectively provided with through holes adapted to the connecting rod, and the four corners of the left side wall of the right frame are respectively provided with through holes adapted to the connecting rod.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides a clamping type self-centering knurling tool for slender shafts, which has the following advantages:

[0017] This clamping-type self-centering knurling fixture for slender shafts uses an adjustable structure—that is, manually rotating a handwheel to drive a screw—to precisely control the movement of the screw block and connecting rod. This allows for fine-tuning of the opening and closing of the tool holder and knurling wheel, enabling precise setting of the knurling pressure according to processing requirements. Furthermore, the fixture's built-in spring allows it to automatically adapt to slender shafts of different diameters, maintaining a tight fit between the knurling wheel and the shaft surface without frequent manual adjustments, thus achieving self-centering. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a front view of the present utility model;

[0020] Figure 3 This is a perspective view of the frame, handwheel, and connecting rod in the structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the back of the present invention.

[0022] In the diagram: 1. Fixed base; 2. Fixed arm; 3. Tool holder; 4. Knurled wheel; 5. Spring; 6. Frame; 7. Screw; 8. Handwheel; 9. Screw block; 10. Connecting rod; 11. Hinge block; 12. Hinge base; 13. Short shaft. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1 to 4 This utility model provides a technical solution: a clamping type slender shaft self-centering knurling fixture, including a fixed base 1, a fixed arm 2 fixedly connected to the front of the fixed base 1, two tool holders 3 rotatably connected to the front of the fixed base 1, a knurling wheel 4 rotatably connected between the front and rear side walls of the tool holders 3, and a spring 5 fixedly connected between the opposite sides of the two tool holders 3. The two tool holders 3 are respectively arranged on the left side and the right side of the front of the fixed base 1. The opposite sides of the left and right tool holders 3 are provided with an adjustment structure for adjusting the knurling pressure.

[0025] like Figure 1 As shown, the adjustment structure includes a frame 6 arranged on opposite sides of the left and right tool holders 3, a screw 7 rotatably connected to the inner wall of the frame 6, a handwheel 8 fixedly connected to the other end of the screw 7, a screw block 9 threadedly connected to the outside of the screw 7, a connecting rod 10 fixedly connected to the opposite side wall of the screw blocks 9 on the left and right sides, a hinge block 11 fixedly connected to the opposite end of the connecting rod 10 on the left and right sides, and a hinge seat 12 hinged to the outside of the hinge block 11.

[0026] It should be noted that the inner side of the fixed arm 2 is provided with a screw pre-set hole, and the fixed arm 2 is fixedly connected to the fixed seat 1 by screws. This design allows the fixed arm 2 to be firmly fixed to the fixed seat 1 by screws, ensuring the stability and reliability of the tooling. The screw pre-set hole makes the installation process more convenient and accurate. Afterwards, the entire tooling can be installed on the machine tool through the fixed arm 2.

[0027] The tool holder 3 has a rotating hole on its inner side, and a short shaft 13 is fixedly connected to the inner side of the rotating hole. One end of the back of the short shaft 13 is fixedly connected to the fixed base 1. The tool holder 3 is rotatably connected to the fixed base 1 through the short shaft 13, so that the tool holder 3 can rotate or be adjusted freely around the short shaft 13.

[0028] The hinge block 11 is hinged between the inner front and rear side walls of the hinge seat 12. The left hinge seat 12 is fixedly connected to the left side wall of the left tool holder 3, and the right hinge seat 12 is fixedly connected to the right side wall of the right tool holder 3. This arrangement design allows the tool holder 3 to be adjusted for opening and closing by adjusting the structure.

[0029] The left screw 7 is rotatably connected to the inner right side wall of the left frame 6, and the right screw 7 is rotatably connected to the inner left side wall of the right frame 6. This design provides stable support for the rotation of the screw 7.

[0030] There are four connecting rods 10 on both the left and right sides. The four connecting rods 10 on the left side are fixedly connected to the four corners of the right side wall of the left screw block 9, and the four connecting rods 10 on the right side are fixedly connected to the four corners of the left side wall of the right screw block 9.

[0031] The four corners of the right side wall of the left frame 6 are respectively provided with through holes that are adapted to the connecting rod 10, and the four corners of the left side wall of the right frame 6 are respectively provided with through holes that are adapted to the connecting rod 10. The design of the through holes allows the connecting rod 10 to move smoothly under the drive of the screw 7 without any obstruction. This design ensures the smoothness and accuracy of the adjustment process.

[0032] In addition, during actual use, the frame 6 should be installed on the equipment together with the fixed base 1 to prevent the tool holder 3 from rotating along the short axis 13 when not in operation. When the knurling wheel 4 performs knurling on the slender shaft, the spring 5 can provide a certain elastic support for the tool holder 3. This support helps to maintain the stability of the tool holder 3 during processing and prevents processing errors caused by vibration or impact. At the same time, the elastic characteristics of the spring 5 allow the knurling pressure to be finely adjusted as needed during processing. By adjusting the preload of the spring 5, the knurling depth can be controlled to meet different processing requirements.

[0033] The working principle of the above embodiments is as follows:

[0034] When it is necessary to adjust the knurling pressure, the handwheel 8 is manually rotated to drive the screw 7 to rotate within the frame 6. Due to the threaded connection between the screw 7 and the screw block 9, the rotation of the screw 7 will drive the screw block 9 to move along the axial direction of the screw 7. The movement of the screw block 9 is transmitted to the hinge block 11 through the connecting rod 10. Due to the hinge relationship between the hinge block 11 and the hinge seat 12, the hinge block 11 will generate a certain rotation angle, which will push or pull the tool holder 3 to rotate around the short axis 13, thereby adjusting the opening and closing of the knurling wheels 4 on the left and right sides, thus realizing the adjustment of the knurling pressure.

[0035] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A clamp-pressing type elongated shaft self-centering knurling tool, comprising a fixing base (1), a fixing arm (2) fixedly connected to the front of the fixing base (1), two tool holders (3) rotatably connected to the front of the fixing base (1), a knurling wheel (4) rotatably connected between the front and rear two side walls in the tool holder (3), and a spring (5) fixedly connected between the opposite sides of the two tool holders (3), characterized in that: Two said knife holders (3) are arranged on the left side of the front of the fixed seat (1) and the right side of the front respectively, and the opposite sides of the left and right said knife holders (3) are provided with adjusting structures for adjusting the size of knurling pressure. The adjusting structure comprises a frame body (6) arranged on the opposite side of the left and right knife holders (3) respectively, a screw rod (7) rotatably connected to the inner side wall of the frame body (6), a hand wheel (8) fixedly connected to the other end of the screw rod (7), a screw block (9) threadedly connected to the outer side of the screw rod (7), a connecting rod (10) fixedly connected to the opposite side wall of the left and right screw blocks (9) respectively, a hinged block (11) fixedly connected to the opposite end of the left and right connecting rods (10) respectively, and a hinged seat (12) hinged to the outer side of the hinged block (11).

2. The pinching elongated shaft self-centering knurling tool of claim 1, wherein: The inner side of the fixed arm (2) is provided with a screw preset opening, and the fixed arm (2) is fixedly connected with the fixed seat (1) through a screw.

3. The pinching elongated shaft self-centering knurling tool of claim 1, wherein: The inner side of the knife holder (3) is provided with a rotating hole, and the inner side of the rotating hole is fixedly connected with a short shaft (13), and one end of the back of the short shaft (13) is fixedly connected with the fixed seat (1).

4. The pinching elongated shaft self-centering knurling tool of claim 1, wherein: The hinged block (11) is hinged between the inner front and rear walls of the hinged seat (12), the left hinged seat (12) is fixedly connected to the left side wall of the left knife holder (3), and the right hinged seat (12) is fixedly connected to the right side wall of the right knife holder (3).

5. The pinching elongated shaft self-centering knurling tool of claim 1 wherein: The left screw rod (7) is rotatably connected to the inner right side wall of the left frame body (6), and the right screw rod (7) is rotatably connected to the inner left side wall of the right frame body (6).

6. The pinching elongated shaft self-centering knurling tool of claim 1 wherein: The number of the left and right connecting rods (10) is four, and the four connecting rods (10) on the left side are fixedly connected to the four corners of the right side wall of the left screw block (9), and the four connecting rods (10) on the right side are fixedly connected to the four corners of the left side wall of the right screw block (9).

7. The pinching elongated shaft self-centering knurling tool of claim 1 wherein: Four corners of the right side wall of the left frame body (6) are provided with through holes matched with the connecting rods (10), and four corners of the left side wall of the right frame body (6) are provided with through holes matched with the connecting rods (10).

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