Riveting tool and riveting device

Abstract

The utility model discloses a riveting tool and a riveting device, and belongs to the technical field of riveting tools. The riveting tool comprises a main body part and a plurality of riveting heads, the plurality of riveting heads are circumferentially arranged at a tail end pipe opening of the main body part at intervals in a surrounding mode, a plurality of riveting points can be generated on a rear end cover and a main cylinder body in a one-time riveting process, the riveting firmness is improved through the plurality of riveting points, the rear end cover and the main cylinder body are not prone to being separated, and the failure rate of a brake system is reduced; the plurality of riveting heads form a conical structure, so that the pressure of the riveting heads on the main cylinder body is increased; the riveting groove is formed in the inner wall of the riveting head, the containing space can be formed between the riveting groove and the rear end cover, in the downward riveting process of the riveting tool, the deformation part of the main cylinder body is riveted to the rear end cover, the redundant deformation part continues to be pressed into the containing space, the length of a metal sealing face can be prolonged, and riveting sealing performance is guaranteed; excess deformation parts can be prevented from being exposed on the surface of the main cylinder body, and the polishing procedure is added.

Description

Technical Field

[0001] The utility model relates to the technical field of riveting, in particular to a riveting tool and a riveting pressing device. Background Art

[0002] In a brake system, due to limited installation space, it is usually necessary to assemble a rear end cover on the master cylinder of the brake system to facilitate guiding the piston in the master cylinder so that the piston can reciprocate along the axial direction of the master cylinder.

[0003] At present, there is a transition fit between the main cylinder body and the rear end cover, and the rear end cover is easy to fall off relative to the main cylinder body, resulting in a high failure rate of the brake system.

[0004] Therefore, it is urgent to provide a riveting tool and a riveting device to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a riveting tool and a riveting device, so as to improve the assembly firmness of the rear end cover and the main cylinder body and the sealing performance of the riveting, and reduce the failure rate of the brake system.

[0006] In order to achieve the above objectives, the following technical solutions are provided:

[0007] A riveting tool, comprising:

[0008] The main body is a tubular structure;

[0009] A plurality of riveting heads are arranged at intervals at a circumferential direction at an end pipe opening of the main body, the outer diameter of each riveting head gradually decreases in a direction away from the main body, and the inner wall of each riveting head is concavely provided with a riveting groove.

[0010] As an optional solution for the riveting tool, the riveting groove is a stepped groove, which includes a first groove and a second groove in sequence along the direction close to the main body, the groove depth of the first groove is greater than the groove depth of the second groove, the second groove is connected to the inner cavity of the main body, and the side of the first groove away from the main body passes through the end face of the riveting head.

[0011] As an optional solution of the riveting tool, the end surface of the riveting head away from the main body is a plane.

[0012] As an optional solution for the riveting tool, four riveting heads are provided and are evenly spaced and distributed along the circumference of the main body.

[0013] As an optional solution for the riveting tool, the plurality of riveting heads and the main body are an integrated structure.

[0014] As an optional solution for the riveting tool, a press mounting portion is provided at one end of the main body away from the riveting head.

[0015] As an optional solution for the riveting tool, the press mounting portion is a snap-fit ​​protrusion or a snap-fit ​​groove.

[0016] As an optional solution for the riveting tooling, a threaded hole is provided on the press mounting portion.

[0017] A riveting device comprises a press and a riveting tool as described in any one of the above items, wherein one end of a main body away from a riveting head is detachably connected to the press.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] The riveting tool provided by the utility model has a plurality of riveting heads arranged at circumferential intervals at an end pipe opening of the main body, and a plurality of riveting points can be generated on the workpiece in one riveting process. The plurality of riveting points improve the riveting firmness between the rear end cover and the main cylinder body, and the rear end cover and the main cylinder body are not easy to separate, thereby reducing the failure rate of the brake system; the outer diameter of each riveting head gradually decreases in the direction away from the main body, so that the plurality of riveting heads form a conical structure as a whole, and the actual contact area between the bottom end surface of the riveting head and the main cylinder body is reduced, and the pressure of the riveting head on the main cylinder body is increased, so that the main cylinder body is more easily deformed; a riveting groove is arranged on the inner wall of each riveting head, so that a accommodating space is formed between the riveting groove and the rear end cover, and in the riveting process of the riveting tool, the deformed part of the main cylinder body is riveted to the rear end cover to form a metal sealing surface, and the excess deformed part can continue to be pressed into the riveting groove, which not only extends the length of the metal sealing surface and further ensures the riveting sealing performance; but also can avoid the excess deformed part from being exposed on the surface of the main cylinder body and increasing the grinding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0021] Figure 1 This is a schematic diagram of the riveting tool structure in an embodiment of the utility model;

[0022] Figure 2 It is a cross-sectional view of the riveting tool in the embodiment of the utility model;

[0023] Figure 3 for Figure 2 A partial enlarged view of point A in the middle.

[0024] Reference numerals:

[0025] 100, riveting tool; 200, rear end cover; 300, main cylinder body;

[0026] 1. Main body; 2. Riveting head; 3. Riveting groove;

[0027] 31. First groove; 32. Second groove. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0031] In the description of the present utility model, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model 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 utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0032] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0035] In the brake system, due to limited installation space, a rear end cover needs to be installed on the master cylinder body to guide the piston in the master cylinder body so that the piston can reciprocate along the axial direction of the master cylinder body.

[0036] At present, the assembly method between the main cylinder body and the rear end cover is single, and the rear end cover is easy to fall off relative to the main cylinder body, which increases the failure rate of the brake system.

[0037] In order to improve the assembly firmness and sealing performance of the main cylinder body and the rear end cover and reduce the failure rate of the brake system, this embodiment provides a riveting tool for press-fitting the rear end cover 200 onto the main cylinder body 300. Figures 1 to 3 The specific contents of this embodiment are described in detail.

[0038] like Figure 1 As shown, the riveting tool 100 includes a main body 1 and a plurality of riveting heads 2. The main body 1 is a tubular structure; the plurality of riveting heads 2 are circumferentially arranged at intervals around one end of the main body 1, and the plurality of riveting heads 2 are arranged as a whole to form a conical structure. Specifically, the outer diameter of the riveting head 2 gradually decreases in a direction away from the main body 1, and a riveting groove 3 is concavely provided on the inner wall of each riveting head 2 along the radial direction of the conical structure.

[0039] In short, a plurality of rivet heads 2 arranged at intervals in the circumferential direction are provided at a pipe opening at one end of the main body 1. When the main body 1 rivets the main cylinder body 300 downward, a plurality of rivet points can be generated on the main cylinder body 300 in one riveting process. Adding a plurality of rivet points can improve the firmness of the riveting, so that the rear end cover 200 and the main cylinder body 300 are firmly riveted, thereby avoiding failure of the brake system. Moreover, the riveting tool 100 has a simple structure and is easy to process and manufacture. A plurality of rivet heads 2 are arranged to form a conical structure. By reducing the riveting area of ​​the rivet heads 2 on the main cylinder body 300, the pressure of the rivet heads 2 on the main cylinder body 300 is increased, making the main cylinder body 300 more likely to deform. Each riveting head 2 has a riveting groove 3 on its inner wall, and a receiving space for the riveting deformed part to be pressed in is formed between the riveting groove 3 and the rear end cover 200. When riveting downward, a part of the deformed part of the main cylinder 300 is riveted to the rear end cover 200, and the excess deformed part can continue to be pressed into the riveting groove 3, which not only extends the length of the metal sealing surface and ensures the riveting sealing performance; but also avoids the excess deformed part from being exposed on the surface of the main cylinder 300, which increases the grinding process. The hardness of the riveting tool 100 in this embodiment is greater than the hardness of the main cylinder 300.

[0040] In some application scenarios, a press can be inserted into the main body 1 of the tubular structure to achieve the connection between the riveting tool 100 and the press.

[0041] The main body 1 is a tubular structure with a hollow interior. On the one hand, when riveting downward, the top of the rear end cover 200 can extend into the tube of the main body 1 to avoid collision between the rear end cover 200 and the main body 1 due to the height of the rear end cover 200 being greater than the height of the riveting head 2; on the other hand, it can also reduce the weight of the riveting tool 100.

[0042] Specifically, Figure 1 , Figure 2 and Figure 3As shown, the riveting groove 3 includes a first groove 31 and a second groove 32, the second groove 32 is connected to the tube cavity of the main body 1, and the side of the first groove 31 away from the main body 1 passes through the end face of the riveting head 2, so that the deformed part of the main cylinder 300 can be pressed into the first groove 31 after riveting. Specifically, the groove depth of the first groove 31 is greater than the groove depth of the second groove 32. Before riveting, the second groove 32 and the rear end cover 200 are matched with a small gap, and a large gap is formed between the first groove 31 and the rear end cover 200 to form a larger space for accommodating. Through the gap fit, the tapered structure is conveniently inserted into the rear end cover 200. After the riveting tool 100 is riveted downward, the deformed part of the main cylinder 300 can first flow to the rear end cover 200 and then flow into the larger space for accommodating to form a metal sealing surface, which extends the length of the metal sealing surface and ensures the sealing performance of the riveting. In actual use, the groove depth of the first groove 31 is designed to be deep enough so that the excess deformed part of the main cylinder body 300 can only be filled in the larger accommodating space, and will not enter the space between the second groove 32 and the rear end cover 200, so that after the riveting is completed, the riveting tool 100 can be pulled out from the rear end cover 200.

[0043] Furthermore, if Figure 1 As shown, in this embodiment, the inner space of the riveting groove 3 is arc-shaped, and the inner diameter of the second groove 32 is equal to the inner diameter of the main body 1. The second groove 32 and the lumen of the main body 1 can be processed at the same time, reducing the processing steps and facilitating mass production of the riveting tool 100.

[0044] Specifically, four riveting heads 2 are provided, and the circumferential interval between two adjacent riveting heads 2 is 90°. In other embodiments, two, three, five, or six riveting heads 2 may also be provided.

[0045] Furthermore, the plurality of riveting heads 2 and the main body 1 are integrated structures, which improves the overall structural strength of the riveting tool 100. For example, the riveting heads 2 and the main body 1 are both made of metal material, and the hardness is greater than that of the main cylinder 300.

[0046] Furthermore, if Figure 2 Combination Figure 3 As shown, the end face of the riveting head 2 away from the main body 1 is a plane, so that the riveting head 2 and the main cylinder body 300 are in plane contact, so that the force points of the riveting head 2 are evenly stressed. When the riveting tool 100 is riveted downward, multiple riveting points are deformed at the same time and the deformation of the main cylinder body 300 is the same, ensuring the riveting effect.

[0047] Further, a press installation portion is provided at one end of the main body 1 away from the riveting head 2. Exemplarily, the press installation portion is a clamping protrusion or a clamping groove.

[0048] In other embodiments, threaded holes may also be provided on the outer peripheral wall of the press mounting portion, and the riveting tool 100 may be mounted on the press using bolts.

[0049] This embodiment also provides a riveting device, which includes a press and the above-mentioned riveting tool 100, and one end of the main body 1 away from the riveting head 2 is detachably connected to the press.

[0050] The following is an overall introduction to the method of using the riveting device in this embodiment:

[0051] An annular groove is opened on the main cylinder body 300, and the lower part of the rear end cover 200 is placed in the annular groove. The riveting tool 100 is sleeved on the outer peripheral wall of the rear end cover 200. A plurality of riveting heads 2 are arranged to form a conical structure. A accommodating space is formed between the inner wall of the riveting groove 3 and the outer peripheral wall of the rear end cover 200. The press applies pressure to the end of the main body 1 away from the riveting head 2. A plurality of riveting heads 2 generate multiple riveting points on the main cylinder body 300. The deformed part at the notch of the annular groove of the main cylinder body 300 is riveted onto the rear end cover 200, and the excess deformed part flows into the accommodating space formed between the inner wall of the riveting groove 3 and the outer peripheral wall of the rear end cover 200, so as to prevent the excess deformed part from flowing out of the accommodating space and increase the grinding process for the upper surface of the main cylinder body 300.

[0052] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described here, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A riveting tool, characterized in that: include: The main body (1) is a tubular structure; A plurality of riveting heads (2) are arranged at intervals in the circumferential direction at an end pipe opening of the main body (1), the outer diameter of each riveting head (2) gradually decreases in a direction away from the main body (1), and the inner wall of each riveting head (2) is concavely provided with a riveting groove (3).

2. The riveting tool according to claim 1, characterized in that: The riveting groove (3) is a stepped groove, and comprises a first groove (31) and a second groove (32) in sequence along a direction close to the main body (1); the groove depth of the first groove (31) is greater than the groove depth of the second groove (32); the second groove (32) is connected to the inner cavity of the main body (1); and the side of the first groove (31) away from the main body (1) passes through the end surface of the riveting head (2).

3. The riveting tool according to claim 2, characterized in that: The end surface of the riveting head (2) away from the main body (1) is a plane.

4. The riveting tool according to any one of claims 1 to 3, characterized in that: Four riveting heads (2) are provided and are evenly spaced and distributed along the circumference of the main body (1).

5. The riveting tool according to claim 4, characterized in that: The plurality of riveting heads (2) and the main body (1) are an integrated structure.

6. The riveting tool according to claim 5, characterized in that: A press installation portion is provided at one end of the main body (1) away from the riveting head (2).

7. The riveting tool according to claim 6, characterized in that: The press installation portion is a clamping protrusion or a clamping groove.

8. The riveting tool according to claim 6, characterized in that: A threaded hole is provided on the press installation part.

9. A riveting device, characterized in that: It comprises a press and a riveting tool as claimed in any one of claims 1 to 8, wherein one end of the main body (1) away from the riveting head (2) is detachably connected to the press.

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