Chain riveting tool and riveting method

Abstract

The application discloses a chain riveting tool and a riveting method, and solves the problems of low efficiency and high operation difficulty of chain link riveting in the prior art, and has the beneficial effects of ensuring product quality and simple operation, and the specific scheme is as follows: a chain riveting tool, comprising a shell, a pressure head and an end flange, the shell is provided with a groove, the shell is provided with an opening at the side of the groove, the opening is connected with a power source, the pressure head is arranged in the groove of the shell, the depth of the groove is greater than the thickness of the pressure head, one end of the pressure head is arranged towards the opening, the other end of the pressure head is provided with a convex part, the convex part can be clamped into a first recess part of the end part of the chain link pin, the maximum width or diameter of the shell is greater than the maximum width of the chain link plate, the shell and the end flange are connected through locking pieces, the locking pieces are arranged around the chain link, the power source is provided to the shell through the opening, and the power source drives the pressure head to move towards the chain link to realize riveting of the chain pin and the chain plate.

Description

A chain riveting fixture and riveting method Technical Field

[0001] This invention relates to the field of chain riveting, and in particular to a chain riveting fixture and riveting method. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] In the field of marine low-speed diesel engine manufacturing, many auxiliary devices on the diesel engine are driven by the crankshaft, and these are mostly connected by chain drive. After the inner and outer links of the chain are connected, as shown in Figure 1, the chain link includes a chain plate 2 and a chain pin 1. The chain pin 1 and the chain plate 2 must be riveted to prevent loosening or even falling off during long-term operation. Currently, the conventional riveting method is to use a 12-pound hand hammer to strike a flat chisel to rivet three grooves 3mm wide and 1.5mm deep at the flange of the chain pin end. The inventors have found that the current manual operation method has the following disadvantages:

[0004] 1. The chain is in a floating state, and the riveting contact area is small. When striking, it is impossible to ensure that the flat chisel, chain pin, and hand hammer are in a straight line, which makes it easy to slip out of your hand and poses a safety hazard.

[0005] 2. The hammering force is weak, the flat chisel is poorly shaped, the riveting quality cannot be guaranteed, and the manual hammering makes the riveting efficiency low.

[0006] 3. The small internal operating space of the main unit and the uneven standing area make it difficult for operators to fully stretch out, resulting in high operating difficulty. Summary of the Invention

[0007] To address the shortcomings of existing technologies, the purpose of this invention is to provide a chain riveting fixture. The housing is driven by a power source to apply a precise axial force to the chain pin, stabilizing the riveting process, ensuring product quality, and is simple, safe, and reliable to operate.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0009] A chain riveting fixture includes a housing, a pressure head, and an end flange. The housing has a groove, and an opening is provided on the side of the groove. The opening is connected to a power source. The pressure head is inserted into the groove of the housing. The depth of the groove is greater than the thickness of the pressure head. One end of the pressure head faces the opening, and the other end of the pressure head has a protrusion that can engage with a first recess at the end of the chain link pin. The maximum width or diameter of the housing is greater than the maximum width of the chain link plate. The housing and the end flange are connected by a locking member that bypasses the chain link. A power source is provided to the housing through the opening. The power source pushes the pressure head toward the chain link to achieve the riveting of the chain pin and the chain plate.

[0010] The aforementioned riveting fixture has a housing and end flange respectively located on both sides of the chain link and can be locked. The protrusion of the pressure head can be inserted into the first recess at the end of the chain pin of the chain link. The housing is connected to the power source. After the power source enters the opening, it enters the gap between the pressure head and the housing and pushes the pressure head toward the chain link. The riveting of the chain pin and the chain plate is achieved through the cooperation of the protrusion and the first recess.

[0011] As described above, in a chain riveting fixture, the housing is a cylindrical housing, and a protrusion is provided on the side of the housing away from the groove. The side length or inner diameter of the groove is smaller than the side length or diameter of the protrusion, so as to ensure that the housing has a groove on the other side relative to the protrusion.

[0012] As described above, in a chain riveting fixture, the protrusion is a cylindrical protrusion, and the central axis of the groove is coaxial with the central axis of the protrusion. The groove and the protrusion are arranged opposite to each other, which ensures the strength of the housing and facilitates the connection between the housing and the hydraulic pump.

[0013] The opening is made on the protrusion of the housing, and the central axis of the opening is coaxial with the central axis of the protrusion.

[0014] As described above, in a chain riveting fixture, a second recess is provided at the other end of the pressure head away from the protrusion. The inner diameter or side length of the second recess is greater than the inner diameter or side length of the opening. In this way, even if the pressure head is tightly fitted to the housing in the initial state, the power source can first enter the second recess through the opening. The power source at the second recess pushes the pressure head relative to the housing, further allowing the power source to enter the gap between the housing and the pressure head.

[0015] The diameter of the pressure head is greater than the outer diameter of the chain link pin, and the height of the pressure head is less than the depth of the groove.

[0016] In the chain riveting fixture described above, the central axis of the second recess is coaxial with the central axis of the pressure head.

[0017] As described above, in a chain riveting fixture, the housing is provided with a sealing groove in the circumferential direction of the groove, and a sealing element is provided in the sealing groove. Considering that the pressure head needs to move relative to the groove, the width of the sealing groove is greater than the width of the sealing element. In this way, even if the sealing element moves with the pressure head, it can still ensure good sealing performance during the movement of the pressure head.

[0018] As described above, in a chain riveting fixture, the housing is provided with a joint at the opening. The joint is connected to a hydraulic pump to supply hydraulic oil to the opening of the housing. The joint facilitates the connection between the hydraulic pump and the housing, and ensures the sealing and reliability of the connection, thus preventing hydraulic oil leakage.

[0019] As described above, in a chain riveting fixture, the protrusion of the pressure head is tapered, so that the riveting strength between the chain pin and the chain plate gradually increases during the process of the pressure head pressing the chain link pin. The protrusion of the pressure head is a multi-claw protrusion, which includes multiple claws that converge at the central axis of the pressure head.

[0020] As described above, in a chain riveting fixture, the locking element consists of multiple connecting bolts located around the protrusion.

[0021] Secondly, the present invention also provides a method for riveting the pin end of a chain link, comprising the following:

[0022] Insert the pressure head into the groove of the housing;

[0023] A housing is provided on one side of the chain link, and the housing contacts the chain plate on one side. An end flange is provided on the other side of the chain link. The protrusion of the pressure head is inserted into the first recess at the end of a chain pin of the chain link. The housing and the end flange are connected by connecting bolts.

[0024] The housing opening connects to the power source;

[0025] The power source provides power through the opening in the housing. The power source pushes the pressure head to move toward the chain link, so that the protrusion of the pressure head further squeezes the end of the chain pin to achieve the riveting of the chain pin and the chain plate.

[0026] The beneficial effects of the present invention are as follows:

[0027] 1) The riveting fixture of the present invention has a housing and an end flange respectively located on both sides of the chain link and can be locked. The protrusion of the pressure head can be inserted into the first recess at the end of the chain pin of the chain link. The housing is connected to the power source. After the power source enters the opening, it enters the gap between the pressure head and the housing and pushes the pressure head toward the chain link. The chain pin and the chain plate are riveted by the cooperation of the protrusion and the first recess. The housing and the end flange are stably connected and are not affected by the state of the chain. The overall riveting speed is fast and the riveting quality is good. The whole device is easy to operate and has low operation difficulty.

[0028] 2) The overall structure of this invention is reasonably designed, making full use of the structural characteristics of the chain links, avoiding the chain links, and forming a closed clamp. By injecting hydraulic oil into the hydraulic cylinder, the protrusion of the pressure head squeezes the first concave part at the end of the chain link pin to achieve the purpose of riveting. The overall structure is simple, low in cost, easy to operate, safe and reliable. During the chain link riveting process, safety hazards are fully eliminated, and product quality and work efficiency are improved.

[0029] 3) By setting a protrusion on one side of the housing, the present invention ensures the strength of the housing with grooves, and also facilitates the setting of threaded holes on the periphery of the protrusion for the installation of locking parts; it also facilitates the connection of the opening to the hydraulic pump; the overall structure of the housing is reasonably set, and the grooves can also ensure the positioning of the housing during installation, and also ensure the full contact between the end face of the housing and the chain link plate during operation.

[0030] 4) In this invention, by providing a tapered protrusion on one side of the pressure head, the pressure head can be gradually pressed against the first concave part of the chain link pin during the movement of the pressure head relative to the housing, so as to ensure the stable riveting of the chain pin and the chain plate.

[0031] 5) The present invention provides a method for riveting the ends of chain links and chain pins. The whole is not affected by the state of the chain, there are no safety hazards, and it is not limited by space. Through the setting of the housing and the pressure head, the housing can be connected to the power source. By controlling the power source, a precise axial force can be applied to the chain pin to ensure the quality of riveting. Attached Figure Description

[0032] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0033] Figure 1 is a schematic diagram of chain links.

[0034] Figure 2 is an anatomical diagram of a chain riveting fixture according to one or more embodiments of the present invention.

[0035] Figure 3 is a cross-sectional view of a chain riveting fixture according to one or more embodiments of the present invention.

[0036] Figure 4 is a schematic diagram of a chain riveting fixture connected to a hydraulic pump according to one or more embodiments of the present invention.

[0037] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0038] Among them: 1. Chain pin, 2. Chain plate, 3. Pressure head, 4. Seal, 5. Housing, 6. Connecting bolt, 7. Connector, 8. Hose, 9. Hydraulic pump, 10. End flange, 11. Chain link, 12. First recess, 13. Protrusion, 14. Second recess. Detailed Implementation

[0039] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0040] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless otherwise expressly indicated by the invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0041] As described in the background section, the existing technology has the problem that the chain pins of chain links need to be riveted manually. In order to solve the above technical problem, the present invention proposes a chain riveting fixture.

[0042] Example 1

[0043] In a typical embodiment of the present invention, referring to Figures 2 and 3, a chain riveting fixture includes a housing 5, a pressure head 3, and an end flange 10. The housing 5 is provided with a groove, and an opening is provided on the side of the groove. The opening is connected to a power source. The pressure head 3 is inserted into the groove of the housing 5. The depth of the groove is greater than the thickness of the pressure head 3. One end of the pressure head 3 is positioned towards the opening, and the other end of the pressure head 3 is provided with a protrusion 13. The protrusion 13 can be engaged with the first recess 12 at the end of the chain link pin 1. The maximum width or diameter of the housing 5 is greater than the maximum width of the chain link plate 2. The housing 5 and the end flange 10 are connected by a locking member. The locking member is positioned around the chain link 11. A power source is provided to the housing through the opening. The power source pushes the pressure head 3 to move towards the chain link 11 to realize the riveting of the chain pin 1 and the chain plate 2.

[0044] In this embodiment, the housing 5 is a cylindrical housing. The shape of the groove in the housing 5 is adapted to the shape of the pressure head 3. A protrusion 15 is provided on the side of the housing 5 away from the groove. That is, one end of the housing 5 is annular and the other end is provided with a step to form the protrusion 15. The side length or inner diameter of the groove is smaller than the side length or diameter of the protrusion 15, so as to ensure that the housing 5 has a groove on the other side relative to the protrusion 15, and also to ensure the strength of the housing.

[0045] Additionally, it is easy to understand that the protrusion 15 on the housing facilitates the connection between the housing 5 and the end flange 10. The locking element consists of multiple connecting bolts 6, which are located around the protrusion. In some examples, four connecting bolts 6 can be provided, with adjacent connecting bolts 6 spaced 90° apart. The housing 5 has threaded holes around the protrusion, and the end flange 10 has a positioning hole at its center. The inner diameter of the positioning hole is larger than the outer diameter of the chain link pin 1 to achieve the positioning of the end flange 10. The end flange 10 also has threaded holes around the positioning hole. The connecting bolts 6 pass through the threaded holes in the housing and the end flange and are then tightened with nuts. It can be understood that the length of the connecting bolts 6 is greater than the width of the chain link, i.e., greater than the length of the chain pin. Specifically, the connecting bolts 6 are hexagonal head connecting bolts.

[0046] Specifically, the protrusion 15 is a cylindrical protrusion, and the corresponding groove is a cylindrical groove. The diameter of the groove is larger than the outer diameter of the chain link pin, so that the end of the chain pin can be inserted into the groove during the installation of the housing 5, ensuring full contact between the end face of the housing and the chain plate. The central axis of the groove is coaxial with the central axis of the protrusion, and the groove and protrusion 15 are opposite to each other. This ensures the strength of the housing and facilitates the connection between the housing and the hydraulic pump.

[0047] Therefore, to avoid interference between the connecting bolt 6 and the chain link 11, the diameter of the housing 5 is larger than the width of the chain link plate 2, and the diameter of the housing 5 can be the same as the diameter of the end flange 10.

[0048] In addition, the opening of the housing 5 is made on the protrusion of the housing. The opening can be a round hole. The opening of the housing 5 extends from the bottom of the groove to the outer end face of the protrusion of the housing. The central axis of the opening is coaxial with the central axis of the protrusion.

[0049] A second recess 14 is provided at the other end of the pressure head 3 away from the protrusion. The cross-section of the second recess 14 is circular, and the central axis of the second recess 14 is coaxial with the central axis of the pressure head. The inner diameter of the second recess 14 is larger than the inner diameter of the opening. In this way, even if the pressure head is tightly fitted to the housing in the initial state, the power source can first enter the second recess 14 through the opening. The power source in the second recess 14 has a set pressure, which can push the pressure head 3 relative to the housing 5, and further allow the power source to enter the gap between the housing and the pressure head, thereby continuing to push the movement of the pressure head.

[0050] In this embodiment, the pressure head 3 is an alloy pressure head and is cylindrical. Considering that the protrusion of the pressure head needs to be inserted into the end of the chain link pin, the diameter of the pressure head 3 is larger than the outer diameter of the chain link pin 1, and the height of the pressure head is smaller than the depth of the groove, so as to facilitate the installation of the riveting fixture and also facilitate the subsequent pushing of the pressure head to achieve the squeezing of the end of the chain pin by the protrusion of the pressure head. The pressure head is made of hard alloy material.

[0051] Considering that the power source needs to drive the pressure head 3 to move relative to the housing 5, the housing 5 is provided with a sealing groove in the circumferential direction of the groove, and a sealing element 4 is provided in the sealing groove. Considering that the pressure head 3 needs to move relative to the groove, the width of the sealing groove is greater than the width of the sealing element. In this way, even if the sealing element moves with the pressure head 3, it can still ensure good sealing performance during the movement of the pressure head 3.

[0052] In this embodiment, the sealing element 4 includes a support ring, and an O-ring seal is provided around the support ring. The working pressure is 2200 bar, and the sealing groove is an annular groove.

[0053] In addition, the housing 5 is provided with a connector 7 at the opening. Referring to Figure 4, the connector 7 is connected to the hydraulic pump 9 through a hose 8 to provide hydraulic oil with a set pressure to the opening of the housing 5. The connector 7 is a conventional hydraulic quick-connect male connector with a working pressure of 2500 bar. The design of the connector 7 facilitates the connection between the hose 8 and the housing 5 and ensures the sealing and reliability of the connection, thus preventing hydraulic oil leakage.

[0054] It should also be explained that the protrusion of the pressure head 3 is conical, so that the riveting strength between the chain pin 1 and the chain plate 2 gradually increases during the process of the pressure head pressing the chain link pin. In this embodiment, the protrusion of the pressure head is a multi-claw protrusion, which includes multiple claws, specifically three or four claws. The distance between two adjacent claws is set at a certain angle. The multiple claws converge at the central axis of the pressure head 3. From one end of the pressure head 3 facing the chain link pin to the other end, the radius of the outer side of the claw gradually increases.

[0055] The riveting fixture provided in this embodiment has a housing 3 and an end flange 10 respectively located on both sides of the chain link 11 and can be locked. The protrusion of the pressure head 3 can be inserted into the first recess 12 at the end of the chain pin of the chain link. The housing 5 has an opening for a connector 7, which is connected to a hydraulic pump 9. In this way, the housing and the pressure head form a hydraulic cylinder. Hydraulic oil with a set pressure enters the opening, then enters the second recess 14, and then enters the gap between the pressure head 3 and the housing 5, pushing the pressure head 3 toward the chain link 11. The riveting of the chain pin 1 and the chain plate 2 is achieved through the cooperation of the protrusion 13 and the first recess 12.

[0056] Example 2

[0057] This embodiment provides a method for riveting the pin ends of chain links, using a chain riveting fixture as described in Embodiment 1, including the following:

[0058] The pressure head is inserted into the groove of the housing, and a connector is installed at the opening of the housing;

[0059] A housing is provided on one side of the chain link, and the housing contacts the chain plate on one side. An end flange is provided on the other side of the chain link. The protrusion of the pressure head is inserted into the first recess at the end of a chain pin of the chain link. The housing and the end flange are connected by connecting bolts.

[0060] The connector is connected to the hydraulic pump via a hose;

[0061] Hydraulic oil is supplied to the opening through the connector. The hydraulic oil enters the second recess of the pressure head and pushes the pressure head, creating a gap between the pressure head and the housing. As the hydraulic oil is gradually supplied, it enters the gap between the pressure head and the housing, further pushing the pressure head toward the chain link. This causes the tapered protrusion of the pressure head to further squeeze the end of the chain pin, thereby achieving a reliable riveting between the chain pin and the chain plate.

[0062] Normally, the hydraulic pump is driven until the design pressure is reached, and the pressure is stabilized for 30 seconds to achieve the end riveting of the chain link pin. After riveting is completed, the hydraulic pump pressure is released, the riveting fixture is removed, and the riveting condition of the chain pin end is checked. The required indentation depth is 2mm and the width is 4mm. Then, the next chain pin end of the chain link is riveted.

[0063] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for riveting the pin ends of chain links, characterized in that, This riveting method is achieved using a chain riveting fixture. The fixture includes a housing, a pressure head, and an end flange. The housing has a groove, and an opening on the side of the groove, connected to a power source. The pressure head is inserted into the groove, the groove's depth being greater than the pressure head's thickness. One end of the pressure head faces the opening, and the other end has a protrusion that engages with a first recess at the end of the chain link pin. The maximum width or diameter of the housing is greater than the maximum width of the chain link plate. The housing and end flange are connected by a locking element that bypasses the chain link. A power source is supplied to the housing through the opening, pushing the pressure head towards the chain link to achieve the riveting of the chain pin and chain plate. The housing is cylindrical, with a protrusion on the side away from the groove. The side length or inner diameter of the groove is smaller than the side length or diameter of the protrusion. The protrusion is cylindrical, and the central axis of the groove is coaxial with the central axis of the protrusion. The opening is located at the protrusion, and the central axis of the opening is coaxial with the central axis of the protrusion. The components are coaxially arranged; a second recess is provided at the other end of the pressure head away from the protrusion, the inner diameter or side length of the second recess is greater than the inner diameter or side length of the opening; the diameter of the pressure head is greater than the outer diameter of the chain link pin, and the height of the pressure head is less than the depth of the groove; a connector is provided at the opening of the housing, and the connector is connected to a hydraulic pump to provide hydraulic oil to the opening of the housing; the protrusion of the pressure head is conical, and the protrusion of the pressure head is a multi-claw protrusion, which includes multiple claws that converge at the central axis of the pressure head; the method includes the following: inserting the pressure head into the groove of the housing; providing the housing on one side of the chain link, with the housing in contact with one side of the chain plate, and providing an end flange on the other side of the chain link; the protrusion of the pressure head is engaged with a first recess at the end of a chain pin in the chain link, and connecting bolts are used to connect the housing and the end flange; the opening of the housing is connected to a power source; the power source provides power through the opening of the housing, and the power source pushes the pressure head toward the chain link, so that the protrusion of the pressure head further squeezes the end of the chain pin to achieve the riveting of the chain pin and the chain plate.

2. The method for riveting the pin ends of a chain link according to claim 1, characterized in that, The central axis of the second recess is coaxial with the central axis of the pressure head.

3. The method for riveting the pin ends of a chain link according to claim 1, characterized in that, The housing is provided with a sealing groove in the circumferential direction of the groove, and a sealing element is provided in the sealing groove. The width of the sealing groove is greater than the width of the sealing element.

4. The method for riveting the pin ends of a chain link according to claim 1, characterized in that, The locking component consists of multiple connecting bolts located around the protrusion.

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