Riveting gun oil cylinder

Abstract

The utility model discloses a riveting gun oil cylinder which comprises a top cover, a middle flange, a first sleeve arranged on the periphery of the top cover and the periphery of the flange in a sleeved mode, a second sleeve connected with the bottom of the flange and a guide sleeve partially arranged in the second sleeve in a penetrating mode. The bottom of the power mechanism is connected with the punching needle and drives the punching needle to vertically move up and down, the top cover, the first sleeve and the flange are respectively detachable independent components, the top cover and the first sleeve are in threaded connection, the first sleeve and the flange are in threaded connection, production and machining are facilitated, if part of the top cover is damaged, only the damaged part is replaced, overall replacement is not needed, and cost is saved.

Description

Technical Field

[0001] This utility model relates to the field of self-piercing riveting equipment technology, and in particular to a riveting gun cylinder. Background Technology

[0002] Self-piercing riveting is a cold joining technique used to join two or more metal sheets. The principle is that a specially designed rivet penetrates the top sheet, and under the action of the riveting die, the hollow structure at the rivet's tail expands and pierces the bottom sheet without penetrating it, thus forming a strong riveting point. The hydraulic cylinder of the riveting gun is the power source for self-piercing riveting. Chinese utility model patent application number CN201521032436.5 discloses a hydraulic fully automatic self-piercing riveting gun, including a clamp body, a self-piercing gun head, a positioning sleeve, a push rod, and a cylinder piston rod. The self-piercing gun head is installed on the front side of the positioning sleeve, the cylinder piston rod is installed on the rear side of the positioning sleeve, one end of the clamp body is installed on the positioning sleeve, and a riveting punch is movably installed inside the self-piercing gun head. However, the top cover and oil port of this type of riveting gun cylinder are integrally machined on the positioning sleeve, and the piston head and piston rod are also integrally formed. Therefore, the manufacturing process is relatively complex, and if partial damage occurs, the entire cylinder needs to be replaced, resulting in high costs. Utility Model Content

[0003] In response to the shortcomings of existing riveting gun cylinders, such as the top cover and oil port being integrally machined on the positioning sleeve, and the piston head and piston rod being integrally molded, resulting in a relatively complex manufacturing process, the applicant provides a riveting gun cylinder with a reasonable structure. The top cover, the first sleeve, and the bottom flange are each independently detachable. The piston head and piston rod are connected by fasteners, which facilitates production and processing. If a part is damaged, only the damaged part can be replaced, without replacing the entire cylinder, thus saving costs.

[0004] The technical solution adopted in this utility model and its beneficial effects are as follows:

[0005] A riveting gun cylinder includes a top cover, a middle flange, a first sleeve sleeved around the top cover and flange, a second sleeve connected to the bottom of the flange, and a guide sleeve partially inserted in the second sleeve. A power mechanism is provided in the first sleeve. The bottom of the power mechanism is connected to a punch and drives it to move vertically up and down. The top cover, the first sleeve, and the flange are each detachable independent components. The top cover and the first sleeve, and the first sleeve and the flange are connected by threads.

[0006] As a further improvement to the above technical solution:

[0007] The power mechanism is a piston, and its piston head is detachably mounted on the upper end of the piston rod by fasteners.

[0008] The upper diameter of the piston rod is smaller than the lower diameter, thus the outer circumference of the piston rod has a stepped surface. The piston head is fitted onto the outer circumference of the upper end of the piston rod. By tightening the fasteners, the piston head abuts against the stepped surface of the piston rod, realizing a detachable connection between the piston head and the piston rod.

[0009] The top cover, the first sleeve, and the bottom flange are all independently detachable. The first oil port is opened in the center of the top cover, and the second oil port is opened on the outer periphery of the flange. The piston head and piston rod of the piston are also detachably connected, which facilitates production and processing. If part is damaged, only the damaged part can be replaced instead of replacing the whole, thus saving costs. The first sleeve is filled with hydraulic oil. By injecting or discharging hydraulic oil into the two oil ports, the piston moves up and down, providing stamping power for the punch.

[0010] A connecting rod connects the piston rod and the punch.

[0011] The first oil port is located in the center of the top cover, and the second oil port is located on the outer periphery of the flange. Injecting and discharging hydraulic oil into the two oil ports can drive the piston to move up and down.

[0012] There is a certain gap between the guide sleeve and the second sleeve, and the guide sleeve can move vertically up and down in the second sleeve.

[0013] A spring is fitted around the outer periphery of the connecting rod. Its upper end abuts against the boss at the top of the connecting rod, and its lower end is inserted into the groove between the guide sleeve and the connecting rod and abuts against the guide sleeve.

[0014] A first guide groove of a certain length is vertically opened on the outer periphery of the guide sleeve, and a first guide member is fixed on the second sleeve corresponding to the first guide groove. The first guide member can move up and down in the first guide groove.

[0015] A second guide groove of a certain length is vertically opened on the outer periphery of the guide sleeve, and a second guide member is fixed on the outer side of the connecting rod corresponding to the second guide groove. The second guide member can move up and down in the second guide groove.

[0016] During riveting, the piston moves downward, and the connecting rod and guide sleeve move downward synchronously. When the riveting point is reached, the guide sleeve stops moving and drives the riveting gun head at the bottom to pre-press and fix the sheet metal to be stamped. The connecting rod and punch continue to move downward until the punch presses the rivet vertically into the sheet metal. After one riveting is completed, the spring that was originally compressed by the boss of the connecting rod returns to its original position, and the connecting rod and guide sleeve move upward together. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is the front view of the present invention.

[0019] Figure 3 for Figure 2 Sectional view of AA.

[0020] Figure 4 This is a schematic diagram of the structure of the present invention with the first sleeve and the second sleeve removed.

[0021] Figure 5 This is a structural schematic diagram of the present invention from another perspective, after removing the first sleeve and the second sleeve.

[0022] Figure 6 This is a schematic diagram of the piston structure.

[0023] In the diagram: 1. Top cover; 11. First oil port; 2. First sleeve; 3. Flange; 31. Second oil port; 4. Second sleeve; 41. First guide component; 5. Guide sleeve; 51. First guide groove; 52. Second guide groove; 6. Punch; 7. Piston; 71. Piston head; 72. Piston rod; 73. Fastener; 8. Connecting rod; 81. Second guide component; 9. Spring. Detailed Implementation

[0024] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0025] like Figure 1-5 As shown, the riveting gun cylinder of this utility model includes a top cover 1, a middle flange 3, a first sleeve 2 sleeved around the outer periphery of the top cover 1 and the flange 3, a second sleeve 4 partially inserted into the bottom groove of the flange 3, and a guide sleeve 5 partially inserted into the second sleeve 4. One end of the guide sleeve 5 located outside the second sleeve 4 is connected to the riveting gun head (not shown in the figure). The top cover 1, the first sleeve 2, and the flange 3 are all detachable independent components. The top cover 1 and the first sleeve 2, and the first sleeve 2 and the flange 3 are all threaded connections, facilitating production and processing. If a part is damaged, only the damaged part can be replaced, eliminating the need for overall replacement and saving costs. Figure 6 As shown, a piston 7 is installed inside the first sleeve 2. Its piston head 71 is detachably mounted on the upper end of the piston rod 72 via a fastener 73, facilitating manufacturing and component replacement. In this embodiment, the fastener 73 is a bolt. The diameter of the upper part of the piston rod 72 is smaller than that of the lower part, resulting in a stepped surface on the outer periphery of the piston rod 72. The piston head 71 is mounted on the outer periphery of the upper end of the piston rod 72. Tightening the bolt causes the piston head 71 to abut against the stepped surface of the piston rod 72, achieving a detachable connection between the piston head 71 and the piston rod 72. The lower end of the piston rod 72 is connected to a connecting rod 8, and the lower end of the connecting rod 8 is connected to a punch 6. The piston 7 can drive the connecting rod 8 and the punch 6 to move up and down within the guide sleeve 5, thereby allowing the punch 6 to press against the rivet. A first oil port 11 is opened in the center of the top cover 1, and a second oil port 31 is opened on the outer periphery of the flange 3. Injecting and discharging hydraulic oil into these two ports provides the power for the piston 7 to move up and down.

[0026] A spring 9 is sleeved around the outer periphery of the connecting rod 8. Its upper end abuts against the boss at the top of the connecting rod 8, and its lower end is inserted into the groove between the guide sleeve 5 and the connecting rod 8, abutting against the guide sleeve 5. A first guide groove 51 and a second guide groove 52 of a certain length are vertically opened on the outer periphery of the guide sleeve 5. A first guide member 41 is fixed on the second sleeve 4 corresponding to the first guide groove 51, and a second guide member 81 is fixed on the outer side of the connecting rod 8 corresponding to the second guide groove 52. There is a certain gap between the guide sleeve 5 and the second sleeve 4. When the connecting rod 8 moves vertically up and down, the connecting rod 8 will push the guide sleeve 5 in the second sleeve 4, and the punch 6 will move vertically up and down in the guide sleeve 5. The first guide member 41 and the second guide member 81 are used for guidance and to prevent the guide sleeve 5, the connecting rod 8 and the punch 6 from rotating relative to each other during the movement.

[0027] In actual operation, the first sleeve 2 is filled with hydraulic oil. By injecting or discharging hydraulic oil into the first oil port 11 and the second oil port 31, the piston 7 moves vertically up and down. The piston 7 drives the connecting rod 8 to move up and down synchronously. During riveting, the piston 7 moves downward, and the connecting rod 8 and the guide sleeve 5 move downward synchronously. When the riveting point is reached, the guide sleeve 5 stops moving and drives the riveting gun head at the bottom to pre-press and fix the sheet metal to be stamped. The connecting rod 8 and the punch 6 continue to move downward until the punch 6 presses the rivet vertically into the sheet metal. After one riveting is completed, the spring 9, which was originally compressed by the boss of the connecting rod 8, returns to its original position, and the connecting rod 8 and the guide sleeve 5 move upward together.

[0028] The above description is an explanation of the present utility model and not a limitation thereof. The present utility model can be modified in any form without departing from its spirit.

Claims

1. A riveting gun cylinder, comprising a top cover (1), a middle flange (3), a first sleeve (2) sleeved around the outer periphery of the top cover (1) and the flange (3), a second sleeve (4) connected to the bottom of the flange (3), and a guide sleeve (5) partially inserted into the second sleeve (4), wherein a power mechanism is provided in the first sleeve (2), and the bottom of the power mechanism is connected to a punch (6) and drives it to move vertically up and down, characterized in that: The top cover (1), the first sleeve (2) and the flange (3) are each detachable independent components. The top cover (1) and the first sleeve (2) and the first sleeve (2) and the flange (3) are connected by threads.

2. The rivet gun ram as defined in claim 1, wherein: The power mechanism is a piston (7), whose piston head (71) is detachably mounted on the upper end of the piston rod (72) by fasteners (73).

3. The rivet gun ram as defined in claim 2, wherein: The upper diameter of the piston rod (72) is smaller than the lower diameter, so the outer periphery of the piston rod (72) has a stepped surface. The piston head (71) is sleeved on the outer periphery of the upper end of the piston rod (72). By tightening the fastener (73), the piston head (71) abuts against the stepped surface of the piston rod (72), thereby realizing the detachable connection between the piston head (71) and the piston rod (72).

4. The rivet gun cylinder of claim 2, wherein: A connecting rod (8) connects the piston rod (72) and the punch (6).

5. The rivet gun cylinder of claim 2, wherein: The top cover (1) has a first oil port (11) in the center and the flange (3) has a second oil port (31) on the outer periphery. The injection and discharge of hydraulic oil into the two oil ports can push the piston (7) to move up and down.

6. The rivet gun cylinder of claim 2, wherein: There is a certain gap between the guide sleeve (5) and the second sleeve (4), and the guide sleeve (5) can move vertically up and down in the second sleeve (4).

7. The rivet gun ram as defined in claim 6, wherein: A spring (9) is fitted around the outer periphery of the connecting rod (8). Its upper end abuts against the boss at the top of the connecting rod (8), and its lower end is inserted into the groove between the guide sleeve (5) and the connecting rod (8) and abuts against the guide sleeve (5).

8. The rivet gun cylinder of claim 6, wherein: The guide sleeve (5) has a first guide groove (51) of a certain length vertically opened on its outer periphery. The second sleeve (4) has a first guide member (41) fixed on it corresponding to the first guide groove (51). The first guide member (41) can move up and down in the first guide groove (51).

9. The rivet gun cylinder of claim 6, wherein: The guide sleeve (5) has a second guide groove (52) of a certain length vertically opened on its outer periphery. The connecting rod (8) has a second guide member (81) fixed on its outer side corresponding to the second guide groove (52). The second guide member (81) can move up and down in the second guide groove (52).

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