Fastener round head nut convenient for cold heading

Abstract

The utility model discloses a fastener round head nut convenient for cold heading, which belongs to the technical field of round head nuts, and is technically characterized by comprising a nut body, a stabilizing mechanism and a reserving mechanism, the side wall of the nut body is provided with the stabilizing mechanism for fixing the nut in the cold heading process, and the reserving mechanism is arranged on the side wall of the nut body. A reserved mechanism for preventing deformation in the cold heading process is arranged on the upper side of the nut body. When the nut body needs to be subjected to cold heading treatment, the side wall of the nut body is clamped through the clamping mechanism, so that the connecting ring piece deforms to be in a straight state, meanwhile, the round head piece moves downwards, the inner groove is aligned with the clamping groove, and the spring releases potential energy to push the side plate outwards to move in the side groove; and the inner grooves in the clamping plates are driven to move outwards to be directly inserted into the aligned clamping grooves, so that the stress of the round head part is released and the round head part is fixed in the cold heading process, overall deformation of the nut during cold heading is avoided, and the forming rate of the nut during cold heading is increased.

Description

Technical Field

[0001] The utility model relates to the field of round head nuts, in particular to a round head nut of a fastener convenient for cold heading. Background Technique

[0002] A cold heading machine is a special equipment dedicated to mass-producing fastening parts such as nuts and bolts. Its principle is the same as that of a stamping machine, which is to use stamping dies to deform materials, so as to process the materials into parts with specific shapes and sizes. During the production of round head nuts, cold heading treatment is required for the round head part.

[0003] Existing round head nuts include a round head part and a cylindrical part. By using the outer spherical arc shape of the round head part, it can better contact items at different angles, making the contact surface between the bolt assembly including the round head nut and the item to be fixed larger, the force more uniform, and effectively improving the stability during fixation. The round head nut and bolt assembly have the characteristics of good applicability, simple structure, convenient use, and wide application range.

[0004] However, during the cold heading process of existing round head nuts, the round head part will shrink and deform under the cold heading pressure, thus squeezing the lower part of the nut, easily causing the overall shrinkage and deformation of the nut and resulting in changes in size specifications. Then, this change range cannot be completely controlled, and there will be a situation where the change exceeds the allowable error range, causing the scrapping of nut parts. Content of the Utility Model

[0005] The purpose of the utility model is to provide a round head nut of a fastener convenient for cold heading, which is used to solve the problem that during the cold heading process of existing round head nuts, the round head part will shrink and deform under the cold heading pressure, thus squeezing the lower part of the nut, easily causing the overall shrinkage and deformation of the nut and resulting in changes in size specifications. Then, this change range cannot be completely controlled, and there will be a situation where the change exceeds the allowable error range, causing the scrapping of nut parts.

[0006] Therefore, the utility model provides a round head nut of a fastener convenient for cold heading, including a nut body, a stabilizing mechanism, and a reserved mechanism. A stabilizing mechanism for fixing the nut during the cold heading process is arranged on the side wall of the nut body, and a reserved mechanism for preventing deformation during the cold heading process is arranged on the upper side of the nut body.

[0007] Preferably: The stabilizing mechanism includes a bayonet and a toothed plate. The bayonet is opened on the side wall of the nut body, and the toothed plate is arranged on the surface of the nut body at the outer position of the bayonet.

[0008] Preferably, the reservation mechanism includes a reservation groove which is opened on the upper side wall of the nut body. A round head piece is installed in the reservation groove. A connecting ring piece is arranged between the round head piece and the reservation groove. An inner groove is opened on the lower side wall of the round head piece. A clamping plate is installed in the inner groove. A side groove is opened on the side wall of the inner groove. A side plate is installed on the side wall of the clamping plate. A spring is connected to the side wall of the side plate. A clamping groove is opened on the lower side wall of the reservation groove.

[0009] Preferably, there are six groups of the bayonet openings.

[0010] Preferably, the connecting ring piece is arranged in an inclined state.

[0011] Preferably, one end of the side plate is connected to the spring, and the other end of the spring is connected to the side wall of the side groove.

[0012] Preferably, the cross-sectional dimension of the clamping groove matches the cross-sectional dimension of the clamping plate.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] In the present utility model, when cold heading treatment needs to be performed on the nut body, the side wall of the nut body is clamped by the clamping mechanism. The clamping structure and static friction effect formed by the tooth pattern plate and the bayonet opening ensure the stability of positioning. When the round head piece is pressed downward by the cold heading machine, it moves downward in the reservation groove, transmitting the downward pressure to the inclined connecting ring pieces made of metal on both sides, causing the connecting ring pieces to deform into a flat state. At the same time, as the round head piece moves downward, the inner groove is aligned with the clamping groove. At this time, the spring releases its potential energy and pushes the side plate to move outward in the side groove, driving the clamping plate to move outward in the inner groove and directly insert into the aligned clamping groove, so that the round head piece releases the force and is fixed during the cold heading process, preventing the overall deformation of the nut during cold heading and improving the forming rate of the cold heading of the nut. Description of the Drawings

[0015] Figure 1 is a three-dimensional view of the present utility model;

[0016] Figure 2 is a front sectional view of the reservation mechanism of the present utility model;

[0017] Figure 3 is the present utility model Figure 2 partial enlarged view A in.

[0018] In the figure:

[0019] 1. Nut body; 201. Bayonet opening; 202. Tooth pattern plate; 301. Reservation groove; 302. Round head piece; 303. Connecting ring piece; 304. Inner groove; 305. Clamping plate; 306. Side groove; 307. Side plate; 308. Spring; 309. Clamping groove. Detailed implementation manners

[0020] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0021] Embodiment 1

[0022] Please refer to Figures 1-3 , the figure shows a preferred implementation manner of the present utility model, a round head nut for a fastener convenient for cold heading, including a nut body 1, a stabilizing mechanism and a reserved mechanism. A stabilizing mechanism for fixing the nut during cold heading is provided on the side wall of the nut body 1, and a reserved mechanism for preventing deformation during cold heading is provided above the nut body 1.

[0023] It should be noted that: in this solution, the stabilizing mechanism and the reserved mechanism improve the cold heading stability of the nut.

[0024] Among them, the stabilizing mechanism includes a bayonet 201 and a toothed plate 202. The bayonet 201 is opened on the side wall of the nut body 1, and the toothed plate 202 is provided on the surface of the nut body 1 at the outer position of the bayonet 201.

[0025] It should be noted that: in this solution, when cold heading treatment is required for the nut body 1, the side wall of the nut body 1 is clamped by a clamping mechanism, and the clamping structure and static friction effect formed by the toothed plate 202 and the bayonet 201 ensure the stability of positioning.

[0026] Among them, six groups of bayonets 201 are provided.

[0027] It should be noted that: this solution facilitates clamping and positioning from multiple angles.

[0028] Embodiment 2

[0029] Please refer to Figures 1-3 , the reserved mechanism includes a reserved groove 301. The reserved groove 301 is opened on the upper side wall of the nut body 1. A round head piece 302 is installed in the reserved groove 301. A connecting ring piece 303 is provided between the round head piece 302 and the reserved groove 301. An inner groove 304 is opened on the lower side wall of the round head piece 302. A clamping plate 305 is installed in the inner groove 304. A side groove 306 is opened on the side wall of the inner groove 304. A side plate 307 is installed on the side wall of the clamping plate 305. A spring 308 is connected to the side wall of the side plate 307. A clamping groove 309 is opened on the lower side wall of the reserved groove 301.

[0030] It should be noted that: in this solution, when the round head part 302 is pressed downward by the cold heading machine, it moves downward in the reserved groove 301, transfers the downward pressure to the inclined metal connecting ring pieces 303 on both sides, deforms the connecting ring pieces 303 to a flat state. At the same time, the round head part 302 moves downward, aligning the inner groove 304 with the clamping groove 309. At this time, the spring 308 releases its potential energy and pushes the side plate 307 to move outward in the side groove 306, driving the inner groove 304 of the clamping plate 305 to move outward and directly insert into the aligned clamping groove 309, so that the round head part 302 releases and is fixed under the force during the cold heading process, avoiding overall deformation of the nut during cold heading.

[0031] Wherein, one end of the side plate 307 is connected to the spring 308, and the other end of the spring 308 is connected to the side wall of the side groove 306.

[0032] It should be noted that: this solution enables the cold heading to be shaped.

[0033] Wherein, the cross-sectional dimension of the clamping groove 309 matches the cross-sectional dimension of the clamping plate 305.

[0034] It should be noted that: this solution facilitates firm cold heading shaping.

[0035] Wherein, the connecting ring piece 303 is arranged in an inclined state.

[0036] It should be noted that: this solution has a reserved deformation angle.

[0037] The working process and principle of the present invention: when cold heading treatment is required for the nut body 1, the side wall of the nut body 1 is clamped by the clamping mechanism. Through the clamping structure and static friction effect formed by the toothed plate 202 and the bayonet 201, the stability of positioning is ensured. When the round head part 302 is pressed downward by the cold heading machine, it moves downward in the reserved groove 301, transfers the downward pressure to the inclined metal connecting ring pieces 303 on both sides, deforms the connecting ring pieces 303 to a flat state. At the same time, the round head part 302 moves downward, aligning the inner groove 304 with the clamping groove 309. At this time, the spring 308 releases its potential energy and pushes the side plate 307 to move outward in the side groove 306, driving the inner groove 304 of the clamping plate 305 to move outward and directly insert into the aligned clamping groove 309, so that the round head part 302 releases and is fixed under the force during the cold heading process, avoiding overall deformation of the nut during cold heading.

[0038] The above content further elaborates on the present invention in combination with specific embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention pertains, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, which should all be regarded as belonging to the protection scope determined by the claims submitted for the present invention.

Claims

1. A round head nut for fasteners that is convenient for cold heading, characterized in that: It includes a nut body (1), a stabilizing mechanism, and a reserved mechanism. A stabilizing mechanism for fixing the nut during the cold heading process is provided on the side wall of the nut body (1), and a reserved mechanism for preventing deformation during the cold heading process is provided on the upper side of the nut body (1).

2. The round head nut of the fastener convenient for cold heading according to claim 1, characterized in that: The stabilizing mechanism includes a bayonet (201) and a toothed plate (202). The bayonet (201) is opened on the side wall of the nut body (1), and the toothed plate (202) is provided on the surface of the nut body (1) at the outer position of the bayonet (201).

3. The round head nut of the fastener convenient for cold heading according to claim 2, characterized in that: The reserved mechanism includes a reserved groove (301). The reserved groove (301) is opened on the upper side wall of the nut body (1). A round head part (302) is installed in the reserved groove (301). A connecting ring piece (303) is provided between the round head part (302) and the reserved groove (301). An inner groove (304) is opened on the lower side wall of the round head part (302). A clamping plate (305) is installed in the inner groove (304). A side groove (306) is opened on the side wall of the inner groove (304). A side plate (307) is installed on the side wall of the clamping plate (305). A spring (308) is connected to the side wall of the side plate (307). A clamping groove (309) is opened on the lower side wall of the reserved groove (301).

4. The round head nut of the fastener convenient for cold heading according to claim 2, characterized in that: Six groups of the bayonets (201) are provided.

5. The round head nut of the fastener convenient for cold heading according to claim 3, characterized in that: The connecting ring piece (303) is arranged in an inclined state.

6. The round head nut of the fastener convenient for cold heading according to claim 3, wherein: One end of the side plate (307) is connected to the spring (308), and the other end of the spring (308) is connected to the side wall of the side groove (306).

7. The round head nut of the fastener convenient for cold heading according to claim 3, characterized in that: The cross-sectional dimension of the clamping groove (309) is in mutual conformity with the cross-sectional dimension of the clamping plate (305).

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