Anti-loosening rear positioning tool for numerical control lathe

Abstract

The utility model discloses an anti-loosing rear positioning tool for a numerically controlled lathe, which relates to the technical field of positioning tools and comprises a rotary joint and a mounting head, the mounting head is arranged on the rotary joint, left-hand external threads are arranged on the outer surface of the mounting head, right-hand internal threads are arranged on the inner surface of the mounting head, and the left-hand external threads and the right-hand internal threads are arranged on the outer surface of the mounting head. A rear positioning part is connected through the left-hand external thread, a positioning screw is mounted through the right-hand internal thread, and a ratchet wheel is arranged on the surface of the rear positioning part; and the pawl is arranged on the rotary joint and is meshed with a ratchet wheel arranged on the rear positioning surface. When the rear positioning device is used, the ratchet wheel is locked anticlockwise and rotates anticlockwise, the rear positioning device is jacked by the internal positioning screw, so that the rear positioning device cannot move anticlockwise and is clamped by the pawl clockwise, the rear positioning device cannot loosen in the machining process, and the product quality is ensured.

Description

Technical Field

[0001] This utility model relates to the field of positioning tooling technology, and in particular to a post-loosening positioning tooling for CNC lathes. Background Technology

[0002] CNC lathes require a back locator to ensure the overall length of products during mass production. The back locator and gripper can be integrated or separate. For multi-variety, small-batch production, a separate design is usually adopted to facilitate debugging and reduce mold changeover time. Since the lengths of finished products vary, the back locator should be manually adjustable. The current design uses a right-hand thread for tightening the back locator. During machining, the thread can loosen momentarily due to the machine's reverse rotation, easily leading to batch length deviations in automated robotic loading production lines. Utility Model Content

[0003] In this section, as well as in the abstract and title of this application, some simplifications or omissions may be made to avoid obscuring the purpose of this section, the abstract, and the title of this application. Such simplifications or omissions shall not be used to limit the scope of this utility model.

[0004] In view of the problems existing in the above or prior art, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide a back-positioning fixture for CNC lathes that prevents loosening of the threads during machine tool reversal.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a locking and positioning fixture for a CNC lathe, comprising,

[0007] Rotary joint,

[0008] A mounting head, mounted on a rotary joint, has an external thread on its outer surface. The mounting head and the rotary joint are an integral structure. The outer surface of the mounting head has a left-hand external thread, and the inner surface has a right-hand internal thread. It is positioned after connection via the left-hand external thread and a positioning screw is installed via the right-hand internal thread. The positioning surface has a ratchet.

[0009] The pawl is mounted on the rotary joint by a locking screw and engages with a ratchet on the rear positioning surface.

[0010] Furthermore, the rotary joint has a fastening bolt mounting port, and the pawl is fixed to the fastening bolt mounting port by a pawl fixing screw, thereby installing the pawl onto the rotary joint.

[0011] Furthermore, the front end face of the positioning screw abuts against the bottom surface of the rear-positioned inner hole.

[0012] Furthermore, the inner side of the rear positioning is provided with a left-hand internal thread.

[0013] Furthermore, the outer side of the rotary joint mates with the chuck.

[0014] Furthermore, the rotary joint also has a through-hole interface, which is concentric with the mounting head, facilitating the expansion of the positioning center water outlet function.

[0015] Furthermore, the outer diameter of the ratchet does not exceed 40mm, the number of ratchet teeth is 16, and the minimum rotation angle is 22.5°.

[0016] The beneficial effects of this utility model are:

[0017] This invention provides an anti-loosening rear positioning fixture for CNC lathes. When rotated counterclockwise, the ratchet is locked, and the left-hand internal thread on the inner side of the rear positioning fixture is secured to the connecting external thread. The inner end face of the rear positioning fixture is pressed against the front end face of the positioning screw, preventing counterclockwise movement. When rotated clockwise, the ratchet is engaged by the pawl. Therefore, the rear positioning fixture will not loosen during machining, ensuring product quality. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0019] Figure 1 A schematic diagram showing the usage status of the anti-loosening and positioning fixture for CNC lathes;

[0020] Figure 2 A schematic diagram of the anti-loosening and positioning fixture for a CNC lathe.

[0021] Figure 3 A schematic diagram of the internal structure of a locking and positioning fixture for a CNC lathe.

[0022] Figure 4 A schematic diagram showing the disassembly of parts for a CNC lathe anti-loosening and positioning fixture.

[0023] Marked in the image:

[0024] 100. Rotary joint; 200. Rear positioning; 300. Pawl; 400. Pawl fixing screw; 500. Positioning screw; 600. Chuck; 101. Mounting head; 102. Left-hand external thread; 103. Through-hole interface; 104. Fastening bolt mounting port; 105. Right-hand internal thread; 201. Ratchet; 202. Left-hand internal thread. Detailed Implementation

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0028] Example, refer to Figures 1-4 This embodiment provides an anti-loosening positioning fixture for a CNC lathe, comprising:

[0029] Rotary joint 100,

[0030] Mounting head 101, which is mounted on rotary joint 100, is an integral structure of mounting head 101 and rotary joint 100. The outer surface of mounting head 101 has a left-hand external thread 102, and the inner surface has a right-hand internal thread 105. A rear positioning 200 is connected via the left-hand external thread 102, and a positioning screw 500 is mounted via the right-hand internal thread 105. A ratchet 201 is provided on the surface of the rear positioning 200.

[0031] The pawl 300 is mounted on the rotary joint 100 by a locking screw 400 and engages with the ratchet 201 provided on the surface of the rear positioning 200.

[0032] The rotary joint 100 has a fastening bolt mounting port 104. The pawl 300 is fixed to the fastening bolt mounting port 104 by the pawl fixing screw 400, thereby installing the pawl 300 on the rotary joint 100.

[0033] Furthermore, the front end face of the positioning screw 500 abuts against the bottom surface of the inner hole of the rear positioning 200. The inner side of the rear positioning 200 is provided with a left-hand internal thread 202.

[0034] The outer side of the rotary joint 100 mates with the chuck 600.

[0035] Furthermore, the rotary joint 100 also has a through-hole interface 103, which is concentric with the mounting head 101, facilitating the expansion of the positioning center water outlet function.

[0036] Furthermore, the outer diameter of the ratchet 201 does not exceed 40mm, the number of ratchet teeth is 16, and the minimum rotation angle is 22.5°.

[0037] Next, the working process of the anti-loosening rear positioning fixture for CNC lathe provided in this example is introduced. Specifically, when using it, unscrew the pawl fixing screw 400, remove the pawl 300, then use a torque wrench to unscrew the rear positioning 200, adjust the length of the positioning screw 500 on the front body of the mounting head 101 (the adjustment angle is an integer multiple of 22.5°, and there are scale lines on the part), tighten the positioning screw 500 through the right-hand internal thread 105 on the inner surface of the mounting head 101, then tighten the rear positioning 200 onto the left-hand external thread 102, insert the pawl 300 on the pawl fixing screw 400 into the ratchet 201, and finally tighten the pawl fixing screw 400. When rotated counterclockwise, the ratchet is locked. The left-hand internal thread on the inner side of the rear positioning 200 is fastened to the left-hand external thread 102 on the outer surface of the mounting head 101. The inner end face of the rear positioning 200 is held in place by the front end face of the positioning screw 500, so the rear positioning 200 cannot move counterclockwise. When rotated clockwise, the ratchet 201 is held in place by the pawl 300. Therefore, the rear positioning 200 will not loosen during processing, ensuring product quality and achieving a scrap rate of 0.

[0038] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A locking and positioning fixture for a CNC lathe, characterized in that: include, Rotary joint (100). Mounting head (101), which is disposed on rotary joint (100), has a left-hand external thread (102) on its outer surface and a right-hand internal thread (105) on its inner surface. A rear positioning device (200) is connected via the left-hand external thread (102), and a positioning screw (500) is installed via the right-hand internal thread (105). The surface of the rear positioning device (200) is provided with a ratchet (201). A pawl (300) is mounted on a rotary joint (100) and engages with a ratchet (201) provided on the surface of a rear positioning (200).

2. The anti-loosening positioning fixture for a CNC lathe according to claim 1, characterized in that: The rotary joint (100) has a fastening bolt mounting port (104). The pawl (300) is fixed to the fastening bolt mounting port (104) by the pawl fixing screw (400), thereby installing the pawl (300) on the rotary joint (100).

3. The anti-loosening positioning fixture for a CNC lathe according to claim 1, characterized in that: The front end face of the positioning screw (500) abuts against the bottom surface of the inner hole of the rear positioning (200).

4. The anti-loosening rear positioning fixture for a CNC lathe according to claim 1, characterized in that: The inner side of the rear positioning (200) is provided with a left-hand internal thread (202).

5. The anti-loosening rear positioning fixture for CNC lathes according to claim 1, characterized in that: The outer side of the rotary joint (100) mates with the chuck (600).

6. The anti-loosening rear positioning fixture for CNC lathes according to claim 1, characterized in that: The outer diameter of the ratchet (201) does not exceed 40mm, the number of ratchet teeth is 16, and the minimum rotation angle is 22.5°.

7. The anti-loosening rear positioning fixture for CNC lathes according to claim 1, characterized in that: The rotary joint (100) also has a through-hole interface (103), which is co-centered with the mounting head (101).

8. The anti-loosening rear positioning fixture for CNC lathes according to claim 1, characterized in that: The mounting head (101) and the rotary joint (100) are an integral structure.

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