Self-locking nut pressing tool

Abstract

The self-locking nut pressing tool comprises a lower closing-in block and an upper closing-in block, a first groove is formed in the top end of the lower closing-in block, a second groove is formed in the bottom end of the upper closing-in block, an opening of the first groove is opposite to an opening of the second groove, the lower closing-in block is connected with a lower die frame, and the upper closing-in block is connected with an upper die frame. Vertical sliding rods are arranged at the two ends of the upper die frame respectively, the lower ends of the sliding rods are connected with the lower die frame, the sliding rods are sleeved with springs, one ends of the springs are connected with the upper die frame, and the other ends of the springs are connected with the lower die frame. And the lower end of the sleeve is in contact with the upper end of the lower die frame, so that the limiting effect is achieved, the extrusion size of each time can be kept consistent, and the machining precision is improved. When the gap between the lower closing-in block and the upper closing-in block needs to be adjusted, the limiting nut is rotated, the positions of the upper die frame and the sleeve relative to the lower die frame are changed, and therefore the gap between the lower closing-in block and the upper closing-in block is changed.

Description

Technical Field

[0001] The utility model belongs to the technical field of nut processing, and in particular relates to a self-locking nut pressing tool. Background Art

[0002] There are many ways to prevent threaded connections in fasteners from loosening, such as mechanical anti-loosening (fuse, cotter pin, stop washer), double nut, spring washer, thread glue, spot riveting, self-locking anti-loosening, etc. Among them, self-locking anti-loosening is divided into many forms, such as all-metal self-locking nut anti-loosening form, nylon insert self-locking nut anti-loosening form, etc. The anti-loosening of all-metal self-locking nuts is mainly achieved by compressing the straight mouth of the nut to deform it, so that when the bolt is screwed into the nut thread, the deformed straight mouth of the nut exerts friction on the bolt thread due to the elastic clamping force. This friction force, together with the friction force generated by the preload force on the support surface after installation, provides an anti-loosening torque. The straight mouth compression of all-metal self-locking nuts is generally carried out on the punch press using upper and lower modules, and the upper line modules are respectively installed on the upper die of the punch slide and the lower die of the workbench. This compression method has the following problems in actual production: the gap between the upper and lower modules is easy to change, and the compression size of the straight mouth of the nut is inconsistent, which affects the processing accuracy. Utility Model Content

[0003] Therefore, the utility model aims to solve the problem in the prior art that the compression dimensions of the straight opening of the nut are inconsistent, thus affecting the processing accuracy.

[0004] To this end, the technical solution adopted is that the utility model provides a self-locking nut pressing tool, including: a lower closing block and an upper closing block, the top of the lower closing block is provided with a first groove, the bottom of the upper closing block is provided with a second groove, the openings of the first groove and the second groove are arranged opposite to each other, the lower closing block is connected to the lower mold frame, the upper closing block is connected to the upper mold frame, vertical sliding rods are respectively provided at both ends of the upper mold frame, the lower end of the sliding rod is connected to the lower mold frame, a spring is provided on the sliding rod, one end of the spring is connected to the upper mold frame, and the other end of the spring is connected to the lower mold frame.

[0005] Preferably, the first groove and the second groove are both V-shaped grooves or semicircular grooves.

[0006] Preferably, a cushion block is provided at the top of the upper mold frame, and a mold handle is provided above the cushion block.

[0007] Preferably, a pad is provided between the lower closing block and the lower mold frame, and slots are provided on the left and right sides of the lower closing block respectively, one end of the pressing plate extends into the slot, and a positioning plate is provided between the pressing plate and the pad.

[0008] Preferably, the backing plate, the positioning plate and the lower mold frame are connected by screws.

[0009] Preferably, the backing plate, the positioning plate and the lower mold frame are connected by cylindrical pins.

[0010] Preferably, a through hole is provided on the upper mold frame, a sleeve is provided in the through hole, the upper end of the slide rod extends into the sleeve, the lower end of the sleeve is located in the spring, a limiting nut is provided at the upper end of the upper mold frame, the upper end of the stud is threadedly connected to the limiting nut, and the lower end of the stud is threadedly connected to the upper end of the slide rod.

[0011] The technical solution of the utility model has the following advantages: the utility model is a self-locking nut pressing tool, which contacts the upper end of the lower mold frame through the lower end of the sleeve, plays a limiting role, keeps the size of each extrusion consistent, and improves the processing accuracy. When it is necessary to adjust the gap between the lower closing block and the upper closing block, rotate the limit nut, and through the threaded transmission of the limit nut and the stud, the position of the upper mold frame and the sleeve relative to the lower mold frame is changed, thereby changing the gap between the lower closing block and the upper closing block to meet the processing requirements of different sizes. The gap can be adjusted to a smaller value to prevent personal injury caused by accidentally extending the hand and reduce safety risks.

[0012] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained by the structures particularly pointed out in the written description and the drawings.

[0013] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 yes Figure 1 AA section view;

[0017] Figure 3 yes Figure 2 BB cross-sectional view;

[0018] Figure 4 It is a top view of the self-locking nut before compression in the utility model;

[0019] Figure 5 It is a left view of the self-locking nut of the utility model before being compressed;

[0020] Figure 6 It is a top view of the self-locking nut after compression in the utility model;

[0021] Figure 7 It is a left view of the self-locking nut after compression in the utility model;

[0022] Among them, 1. lower closing block; 2. upper closing block; 3. first groove; 4. second groove; 5. lower mold frame; 6. upper mold frame; 7. sliding rod; 8. spring; 9. cushion block; 10. mold handle; 11. pad; 12. slot; 13. pressure plate; 14. positioning plate; 15. screw; 16. cylindrical pin; 17. through hole; 18. sleeve; 19. limit nut; 20. stud; 21. self-locking nut. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When a component is referred to as being "connected to" another component, it can be directly or indirectly connected to the other component.

[0025] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0027] The utility model provides a self-locking nut pressing tool, such as Figure 1-7As shown, it includes: a lower closing block 1 and an upper closing block 2, the top of the lower closing block 1 is provided with a first groove 3, the bottom of the upper closing block 2 is provided with a second groove 4, the openings of the first groove 3 and the second groove 4 are arranged opposite to each other, the lower closing block 1 is connected to the lower mold frame 5, the upper closing block 2 is connected to the upper mold frame 6, both ends of the upper mold frame 6 are respectively provided with vertical sliding rods 7, the lower end of the sliding rod 7 is connected to the lower mold frame 5, a spring 8 is sleeved on the sliding rod 7, one end of the spring 8 is connected to the upper mold frame 6, and the other end of the spring 8 is connected to the lower mold frame 5, and the lower mold frame 5 is installed on the workbench of the stamping machine.

[0028] The first groove 3 and the second groove 4 are both V-shaped grooves or semicircular grooves. A cushion block 9 is provided at the top of the upper die frame 6. The cushion block 9 is a stepped shaft and is installed on the die frame 6 by interference fit. A die handle 10 is provided above the cushion block 9. The die handle 10 is a stepped shaft and can be installed on the punching head of the punching machine. A pad 11 is provided between the lower closing block 1 and the lower die frame 5. The left and right sides of the lower closing block 1 are respectively provided with a card groove 12. One end of the pressing plate 13 extends into the card groove 12. A positioning plate 14 is provided between the pressing plate 13 and the cushion plate 11. The cushion plate 11, the positioning plate 14 and the lower die frame 5 are connected by screws 15. The cushion plate 11, the positioning plate 14 and the lower die frame 5 are connected by cylindrical pins 16. A through hole 17 is provided on the upper mold frame 6, a sleeve 18 is provided in the through hole 17, the upper end of the slide rod 7 extends into the sleeve 18, the lower end of the sleeve 18 is located in the spring 8, a limiting nut 19 is provided at the upper end of the upper mold frame 6, the upper end of the stud 20 is threadedly connected to the limiting nut 19, and the lower end of the stud 20 is threadedly connected to the upper end of the slide rod 7.

[0029] The beneficial technical effect of the above technical solution is as follows: when in use, the straight end of the self-locking nut 21 is placed between the first groove 3 and the second groove 4, the punching machine is started, the die handle 10 is driven to punch downward, and the upper closing block 2 is moved downward by applying pressure to the cushion block 9, so that the straight end of the self-locking nut is squeezed, so that the straight end is pressed into an elliptical shape, such as Figure 7 As shown, the lower end of the sleeve 18 contacts the upper end of the lower die frame 5, which plays a limiting role, keeps the size of each extrusion consistent, and improves the processing accuracy. When it is necessary to adjust the gap between the lower closing block 1 and the upper closing block 2, rotate the limit nut 19, and through the threaded transmission of the limit nut 19 and the stud 20, the position of the upper die frame 6 and the sleeve 18 relative to the lower die frame 5 is changed, thereby changing the gap between the lower closing block 1 and the upper closing block 2 to meet the processing requirements of different sizes. The gap can be adjusted to a smaller value to prevent personal injury caused by accidentally inserting the hand and reduce safety risks.

[0030] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A self-locking nut pressing tool, characterized in that: include: A lower closing block (1) and an upper closing block (2), the top of the lower closing block (1) is provided with a first groove (3), the bottom of the upper closing block (2) is provided with a second groove (4), the openings of the first groove (3) and the second groove (4) are arranged opposite to each other, the lower closing block (1) is connected to a lower mold frame (5), the upper closing block (2) is connected to an upper mold frame (6), both ends of the upper mold frame (6) are respectively provided with vertical sliding rods (7), the lower end of the sliding rod (7) is connected to the lower mold frame (5), a spring (8) is sleeved on the sliding rod (7), one end of the spring (8) is connected to the upper mold frame (6), and the other end of the spring (8) is connected to the lower mold frame (5).

2. A self-locking nut pressing tool according to claim 1, characterized in that: The first groove (3) and the second groove (4) are both V-shaped grooves or semicircular grooves.

3. A self-locking nut pressing tool according to claim 1, characterized in that: A cushion block (9) is arranged at the top of the upper mold frame (6), and a mold handle (10) is arranged above the cushion block (9).

4. A self-locking nut pressing tool according to claim 1, characterized in that: A backing plate (11) is arranged between the lower closing block (1) and the lower mold frame (5), and a clamping groove (12) is arranged on the left and right sides of the lower closing block (1), one end of the pressing plate (13) extends into the clamping groove (12), and a positioning plate (14) is arranged between the pressing plate (13) and the backing plate (11).

5. A self-locking nut pressing tool according to claim 4, characterized in that: The backing plate (11), the positioning plate (14) and the lower mold frame (5) are connected by screws (15).

6. A self-locking nut pressing tool according to claim 4, characterized in that: The backing plate (11), the positioning plate (14) and the lower mold frame (5) are connected via a cylindrical pin (16).

7. A self-locking nut pressing tool according to claim 1, characterized in that: A through hole (17) is provided on the upper mold frame (6), a sleeve (18) is provided in the through hole (17), the upper end of the slide rod (7) extends into the sleeve (18), the lower end of the sleeve (18) is located in the spring (8), a limit nut (19) is provided at the upper end of the upper mold frame (6), the upper end of the stud (20) is threadedly connected to the limit nut (19), and the lower end of the stud (20) is threadedly connected to the upper end of the slide rod (7).

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