Bolt with straight lines

Abstract

The utility model discloses a bolt with straight lines, which comprises a head part and a screw rod, the screw rod comprises a thread part and a straight rod part, a large-diameter ring is integrally formed on the outer curved surface of the straight rod part, and the large-diameter ring is connected to the head part; the large-diameter ring is arranged on the straight rod part of the screw rod, the large-diameter ring and the straight rod part are coaxial, and a plurality of clamping grooves are formed in the outer curved surface of the large-diameter ring at equal angles by taking the axis of the straight rod part as the center, so that straight grains are formed outside the straight rod part. When the eccentric ring is riveted and pressed on the top of the screw and attached to the head, no gap exists between the lower edge of an inner hole in the eccentric ring and the straight rod part, the attractiveness of a product is improved, and the anti-rotation torsion of the product is improved. A plurality of clamping grooves are formed in the outer curved surface of the large-diameter ring at equal angles, so that the anti-rotation torsion of a product after the eccentric ring is riveted is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to bolt technical field especially a bolt with straight line. BACKGROUND

[0002] The bolt that swing arm or connecting rod is connected with axle is generally eccentric bolt, and rotating the bolt can fine tune the actual connecting length of swing arm and axle.

[0003] As shown in the eccentric bolt disclosed in application No. 201220565051.5, the current eccentric bolt is generally made by riveting and pressing ordinary bolt and eccentric ring, wherein the rod part in the bolt is generally designed to gradually increase in diameter along the upward direction, so as to be riveted and pressed with the eccentric ring, however, after the riveting and pressing of the eccentric ring is completed, there will be a gap between the lower edge of the through hole in the eccentric ring and the bolt, which affects the anti-rotational torque of the product and the aesthetic degree of the product, therefore, improvement is needed. UTILITY MODEL CONTENTS

[0004] In view of the deficiencies of the prior art, the utility model provides a bolt with straight line to solve the problems mentioned in the background art.

[0005] The utility model provides the following technical scheme: a bolt with straight line, including head and screw rod, the screw rod includes threaded part and straight rod part, the outer curved surface of straight rod part is integrally formed with large diameter ring, and the large diameter ring is connected to the head;

[0006] The large diameter ring is coaxial with the straight rod part, and the large diameter ring is equiangularly provided with a plurality of clamping grooves inside the outer curved surface with the axis of the straight rod part as the center.

[0007] Preferably, the lower side surface of the large diameter ring and the outer curved surface of the straight rod part form an inclined surface with an inverted bevel angle.

[0008] Preferably, the difference between the diameter of the large diameter ring and the straight rod part is not less than 0.1mm.

[0009] Preferably, the clamping groove penetrates the inclined surface downward.

[0010] Preferably, an arc-shaped groove is formed vertically in the threaded part, a triangular groove is connected to the upper end of the arc-shaped groove in communication, the groove surface of the arc-shaped groove is connected to the groove surface of the triangular groove, the groove depth of the triangular groove gradually becomes shallower along the upward direction, and the rear side arc surface of the triangular groove is inclined forward along the upward direction.

[0011] Preferably, the arc-shaped groove and the triangular groove are provided with two groups distributed left and right.

[0012] Preferably, the groove depths of the two arc-shaped grooves are different, so that the vertical extension distances of the two triangular grooves are different.

[0013] The utility model provides a bolt with straight line has the following beneficial effects:

[0014] The utility model discloses a big diameter ring is arranged on the straight bar portion in the screw rod, so that the eccentric ring rivet is pressed in the top of screw rod and makes the eccentric ring stick to the head portion, the lower edge of the inner hole in the eccentric ring is not gaped between the straight bar portion, increases the product aesthetic quality, and improves the anti-rotating torsional force of product.

[0015] The utility model discloses a plurality of clamping grooves are arranged in the outer curved surface of big diameter ring at equal angles, to further improve the anti-rotating torsional force of product after the riveting of eccentric ring is completed. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the front view of the utility model;

[0017] Figure 2 It is Figure 1 It is the appearance schematic diagram of another view angle in big diameter ring;

[0018] Figure 3 It is the appearance schematic diagram of another view angle of the utility model.

[0019] In the drawing:

[0020] 11, head; 12, screw rod; 21, threaded portion; 22, straight bar portion; 23, big diameter ring; 24, clamping groove; 31, arc-shaped groove; 32, triangular groove. DETAILED DESCRIPTION

[0021] The embodiments of the utility model are described in detail below, and the examples of the embodiments are shown in the drawings. The embodiments described below by referring to the drawings are exemplary, and are intended to explain the utility model, and cannot be understood as the limitation of the utility model.

[0022] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, a particular orientation and operation, and therefore cannot be understood as the limitation of the utility model.

[0023] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0024] In the utility model, unless otherwise specifically defined and limited, the terms "installation", "connection", "connection", "fixing" and other terms should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or communicate with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication or interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0025] Reference Figures 1-3 According to the embodiment of the bolt with straight line of the utility model, it comprises head 11 and screw rod 12, the screw rod 12 comprises threaded part 21 and straight rod part 22, in order to make eccentric ring riveting on the top of the screw rod 12 and make the lower edge of the hole in the eccentric ring and the straight rod part 22 without gap when the eccentric ring is attached to the head 11, the outer curved surface of the straight rod part 22 is integrally formed with large diameter ring 23, and the large diameter ring 23 is connected to the head 11.

[0026] And the large diameter ring 23 is coaxial with the straight rod part 22, and in order to make the eccentric ring riveting completed and closely attached to the head 11, the outer curved surface of the large diameter ring 23 is provided with a plurality of clamping grooves 24 with equal angles as the center of the axis of the straight rod part 22, so that the straight rod part 22 forms a straight line, after the riveting of the eccentric ring is completed, the material in the large diameter ring 23 is deformed and filled in the clamping groove 24, avoiding filling between the eccentric ring and the head 11 to cause the gap between the eccentric ring and the screw rod 12, and the design of the clamping groove 24 improves the torsional resistance of the eccentric ring after riveting.

[0027] And in order to facilitate riveting, the lower side of the large diameter ring 23 and the outer curved surface of the straight rod part 22 form an inclined surface with an inverted bevel angle, and the clamping groove 24 penetrates the inclined surface downward, in addition, the difference between the diameter of the large diameter ring 23 and the straight rod part 22 is not less than 0.1mm.

[0028] In the second embodiment of the bolt with straight thread, vertical arc-shaped grooves 31 are formed in the thread part 21, the arc-shaped grooves 31 are arranged to facilitate positioning of the bolt with straight thread, and the upper end of each arc-shaped groove 31 is connected to a triangular groove 32, the groove surface of the arc-shaped groove 31 is connected to the groove surface of the triangular groove 32, the groove depth of the triangular groove 32 gradually decreases in the upward direction, and the rear arc surface of the triangular groove 32 is inclined forward in the upward direction.

[0029] The arc-shaped grooves 31 and the triangular grooves 32 are arranged in two groups distributed left and right, and the groove depths of the two arc-shaped grooves 31 are different, so that the vertical extension distances of the two triangular grooves 32 are different.

[0030] The bolt is designed as a 10.9 grade to improve tensile strength.

[0031] The above only describes specific embodiments of the present application, but the technical features of the present application are not limited thereto, and any person skilled in the art can make changes or modifications in the field of the present application, which are all covered by the patent scope of the present application.

Claims

1. A bolt with straight threads comprising a head (11) and a shank (12), characterized in that: The screw rod (12) comprises a threaded part (21) and a straight rod part (22), an outer curved surface of the straight rod part (22) is integrally formed with a large-diameter ring (23), and the large-diameter ring (23) is connected to the head part (11); The large-diameter ring (23) is coaxial with the straight rod part (22), and a plurality of clamping grooves (24) are arranged at equal angles on an outer curved surface of the large-diameter ring (23) with the axis of the straight rod part (22) as the center, so that straight lines are formed on the outer surface of the straight rod part (22).

2. A straight-threaded bolt as defined in claim 1, wherein: An inclined surface is formed between the lower side of the large-diameter ring (23) and the outer curved surface of the straight rod part (22) at an inverted inclined angle.

3. A straight-threaded bolt as defined in claim 1, wherein: The difference between the diameter of the large-diameter ring (23) and the straight rod part (22) is not less than 0.1 mm.

4. A straight-threaded bolt as defined in claim 2, wherein: The clamping grooves (24) penetrate the inclined surface downward.

5. A straight-threaded bolt as defined in claim 1, wherein: An arc-shaped groove (31) is vertically arranged in the threaded part (21), an upper end of the arc-shaped groove (31) is connected with a triangular groove (32), a groove surface of the arc-shaped groove (31) is connected with a groove surface of the triangular groove (32), the groove depth of the triangular groove (32) gradually decreases in the upward direction, and a rear arc surface of the triangular groove (32) is forwardly inclined in the upward direction.

6. A straight-threaded bolt as defined in claim 5, wherein: The arc-shaped groove (31) and the triangular groove (32) are arranged in two groups distributed on the left and right sides.

7. A straight-threaded bolt as defined in claim 6, wherein: The groove depths of the two arc-shaped grooves (31) are different, so that the vertical extension distances of the two triangular grooves (32) are different.

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