Hand riveter

Abstract

The utility model relates to the technical field of riveting tools, in particular to a hand riveter. The hand riveter comprises a shell, a power structure, a rivet pulling structure and a tension detection assembly, the tension detection assembly is arranged on the linear moving assembly in a sleeving mode and arranged in a cavity formed by a shell body, the tension detection assembly comprises a pressure sensor and a pressure bearing sleeve, and the pressure bearing sleeve is arranged between the pressure sensor and a holster and abuts against the holster. The pressure bearing sleeve can make contact with the pressure sensor. After the pulling rivet is tensioned by the pulling rivet structure, the holster abuts against the shell of the battery, so that when the shell is subjected to pulling force of the pulling rivet, the holster also reacts to apply pushing force to the holster, the pushing force is the same as the pulling force, the holster is pushed to extrude the pressure bearing sleeve, and the pressure bearing sleeve transmits the pushing force to the pressure sensor; therefore, the movement of the power structure can be controlled according to the tensile force to avoid too low or too high tensile force, thereby improving the quality of the single battery and improving the qualified rate of products.

Description

Technical Field

[0001] This utility model relates to the field of riveting tools, and in particular to a rivet gun. Background Technology

[0002] After the individual cells are filled with electrolyte, the filling port needs to be sealed. The sealing method is to use a rivet gun for riveting. However, since there is no monitoring function for the pulling force of the rivet gun, the production staff can only check it with their naked eyes. This cannot guarantee that the pulling force value is within a reasonable range, which may cause the rivet to fail to break or the pulling force to be excessive, resulting in unstable quality of the sealed individual cells and thus reducing the product qualification rate.

[0003] Therefore, there is an urgent need for a rivet gun to solve the above-mentioned technical problems. Utility Model Content

[0004] The purpose of this invention is to provide a rivet gun that can intuitively obtain the pulling force value during rivet operation, thereby improving the product qualification rate.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A rivet gun is provided, comprising:

[0007] The outer casing includes a holster, a locking element, and a casing body, wherein the holster extends into the locking element and is connected to the casing body through the locking element, and the holster has a rivet insertion port;

[0008] A power structure is located within the cavity formed by the shell body. The power structure includes a power component, a linear motion component, and a transmission component. The power component is connected to the linear motion component via the transmission component.

[0009] A riveting structure is located within the cavity formed by the holster, and the riveting structure is connected to the linear motion assembly;

[0010] A tensile force detection component is sleeved on the linear motion component and disposed in the cavity formed by the shell body. The tensile force detection component includes a pressure sensor and a pressure-bearing sleeve. The pressure-bearing sleeve is disposed between the pressure sensor and the gun sleeve and abuts against the gun sleeve. The pressure-bearing sleeve can contact the pressure sensor.

[0011] This utility model has at least the following beneficial effects:

[0012] After the rivets are tightened by the rivet structure, the holster will abut against the battery casing. When the casing is subjected to the pulling force of the rivets, it will also exert a reaction force on the holster, which is the same as the pulling force. The holster being pushed will squeeze the pressure sleeve, which will transmit the pushing force to the pressure sensor. The pressure sensor will then detect the magnitude of the pushing force. Since the pushing force is the same as the pulling force, the pressure sensor can detect the pulling force. Therefore, the movement of the power structure can be controlled according to the pulling force to avoid the pulling force being too low or too high, thereby improving the quality of the single battery and increasing the product qualification rate. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of the rivet gun provided in an embodiment of the present utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the locking component provided in an embodiment of the present utility model;

[0016] Figure 3 A first sectional view of the rivet gun provided in an embodiment of this utility model;

[0017] Figure 4 This is a second cross-sectional view of the rivet gun provided in an embodiment of the present invention.

[0018] In the picture:

[0019] 1. Outer shell; 11. Holster; 12. Locking component; 121. Limiting ring; 122. Connecting sleeve; 13. Shell body; 14. Set screw; 2. Power structure; 21. Power component; 22. Lead screw; 23. Nut; 24. Driven gear; 25. Drive gear; 3. Riveting structure; 31. Push rod; 32. Pull head sleeve; 33. Push rod pull sleeve; 34. Elastic component; 35. Clamp; 4. Tension detection component; 41. Pressure sleeve; 42. Pressure sensor; 5. First sealing structure; 6. Nail tube; 7. Vacuum pump; 8. Nozzle. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0021] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0024] Figure 1 This is a schematic diagram of the structure of the rivet gun provided in an embodiment of the present utility model. Figure 3 This is a first cross-sectional view of the rivet gun provided in an embodiment of the present utility model. Figure 4 A second sectional view of the rivet gun provided in an embodiment of this utility model, as shown below. Figure 1 , Figure 3 and Figure 4As shown, the rivet gun includes a housing 1, a power structure 2, a rivet structure 3, and a tensile force detection assembly 4. The housing 1 includes a gun sleeve 11, a locking member 12, and a housing body 13. The gun sleeve 11 extends into the locking member 12 and is connected to the housing body 13 through the locking member 12. The gun sleeve 11 has a rivet insertion port for the rivet rod to pass into the rivet gun. The power structure 2 is located in the cavity formed by the housing body 13. The power structure 2 includes a power component 21, a linear motion assembly, and a transmission assembly. The power component 21 is connected to the linear motion assembly through the transmission assembly. The rivet structure 3 is located in the cavity formed by the gun sleeve 11 and is connected to the linear motion assembly. The tensile force detection assembly 4 is sleeved on the linear motion assembly and located in the cavity formed by the housing body 13. The tensile force detection assembly 4 includes a pressure sensor 42 and a pressure-bearing sleeve 41. The pressure-bearing sleeve 41 is located between the pressure sensor 42 and the gun sleeve 11 and abuts against the gun sleeve 11. The pressure-bearing sleeve 41 can contact the pressure sensor 42.

[0025] After the rivet is tightened by the rivet structure 3, the holster 11 will abut against the battery casing 1. When the casing 1 is subjected to the pulling force of the rivet, it will also react to the holster 11 to apply a pushing force to the holster 11. This pushing force is the same as the pulling force. The holster 11 being pushed will squeeze the pressure sleeve 41. The pressure sleeve 41 will transmit the pushing force to the pressure sensor 42. The pressure sensor 42 will then detect the magnitude of the pushing force. Since the pushing force is the same as the pulling force, the pressure sensor 42 can detect the pulling force. Therefore, the movement of the power structure 2 can be controlled according to the pulling force to avoid the pulling force being too low or too high, thereby improving the quality of the single battery and increasing the product qualification rate.

[0026] In some embodiments, the pressure sensor 42 and the pressure sleeve 41 are spaced apart. This arrangement prevents the pressure sleeve 41 from transmitting thrust when not in operation, thus preventing the pressure sensor 42 from always being in a detection state, thereby improving the service life of the pressure sensor 42.

[0027] During the riveting process, electrolyte adhering to the individual battery cells may enter the rivet gun through the rivet insertion port of the sleeving 11. This electrolyte can corrode the internal structure of the rivet gun (such as the power structure 2), affecting its service life. Therefore, in some embodiments, a first sealing structure 5 is provided between the pressure sleeve 41 and the linear motion component. The first sealing structure 5 can block electrolyte from entering the rivet gun, preventing it from corroding the power structure 2 and improving its service life.

[0028] For example, the first sealing structure 5 includes an oil seal. The oil seal ensures a good seal and prevents leakage caused by gaps between the pressure sleeve 41 and the linear moving component due to prolonged movement of the linear moving component, thereby improving the overall sealing effect of the rivet gun.

[0029] Figure 2This is a structural schematic diagram of the locking member provided in an embodiment of the present utility model, as shown below. Figure 2 As shown, in some embodiments, the locking member 12 includes a limiting ring 121 and a connecting sleeve 122 fixedly connected to the limiting ring 121. The inner diameter of the limiting ring 121 is smaller than the inner diameter of the connecting sleeve 122. The connecting sleeve 122 is disposed on the side of the limiting ring 121 facing the tensile detection component 4. One end of the holster 11 is located inside the connecting sleeve 122 and mutually limits the limiting ring 121 along the axial direction of the holster 11. The connecting sleeve 122 is fixedly connected to the housing body 13. Specifically, the diameter of the portion of the holster 11 extending into the connecting sleeve 122 is larger than the inner diameter of the limiting ring 121, thus preventing the holster 11 from protruding from the limiting ring 121. The limiting ring 121 provides unidirectional limiting for the holster 11. The pressure sleeve 41 abuts against the holster 11, and the pressure sleeve 41 of the holster 11 achieves unidirectional limiting. In this way, the pressure sleeve 41 and the locking member 12 can limit the holster 11 axially.

[0030] like Figure 4 As shown, the outer wall of the holster 11 has a limiting surface, and the locking member 12 is provided with a top screw 14 that abuts against the limiting surface to prevent the holster 11 from rotating relative to the locking member 12.

[0031] The rivet insertion port is also equipped with a nozzle 8, which is inserted into the outer casing 1. The nozzle 8 has a through hole for the rivet shank to pass through and be clamped by the riveting structure 3. A second sealing structure is provided at the end of the nozzle 8 facing away from the outer casing 1. Specifically, a groove for accommodating the second sealing structure is provided at the end of the nozzle 8 facing away from the outer casing 1. The second sealing structure is at least partially located in the groove, thus achieving the purpose of the second sealing structure abutting against the battery casing. The second sealing structure contacts both the battery casing and the nozzle 8, thereby preventing electrolyte from the outside of the second sealing structure from entering the riveting gun, further preventing electrolyte from entering the riveting gun, and reducing the probability of electrolyte entering the riveting gun.

[0032] For example, the second sealing structure includes a rubber sealing ring. The rubber sealing ring can withstand friction and vibration under dynamic operating conditions, exhibiting good wear resistance and fatigue resistance, thereby extending the service life of the seal and reducing the assembly cost of the battery pack.

[0033] In some embodiments, such as Figure 3 and Figure 4As shown, the riveting structure 3 includes a push rod 31, a pull head sleeve 32, a push rod pull sleeve 33, an elastic element 34, and at least two jaws 35. The two ends of the push rod pull sleeve 33 are connected to the linear motion assembly and the pull head sleeve 32, respectively. One end of the jaw 35 is located inside the pull head sleeve 32, and the other end extends out of the pull head sleeve 32. The push rod 31 abuts against the other end of the jaw 35. The two ends of the elastic element 34 abut against the bottom of the grooves of the push rod 31 and the push rod pull sleeve 33, respectively. The elastic element 34 always has a tendency to push the push rod 31 towards the jaws 35. When the linear motion assembly is working, it can pull the push rod pull sleeve 33 to move linearly. Since the push rod pull sleeve 33 is connected to the pull head sleeve 32, the pull head sleeve 32 will also move accordingly. This causes the pull head sleeve 32 to squeeze the jaws 35 together, thereby clamping the rivet rod and simultaneously pulling the rivet rod to break it.

[0034] In some embodiments, the number of grippers 35 is preferably three, thereby improving the tensioning effect on the rivet rod. For example, the elastic element 34 is a spring.

[0035] In some embodiments, the zipper pull sleeve 32 has a tapered hole, and the gripper 35 has a wedge-shaped structure, with the sidewall of the gripper 35 fitting against the wall of the tapered hole. This arrangement ensures that the gripper 35 can be released or retracted when the zipper pull sleeve 32 moves relative to the gripper 35.

[0036] In some embodiments, to facilitate the removal of broken rivet rods, the rivet gun further includes a rivet strip tube 6. The rivet strip tube 6 passes through the linear motion assembly along its axial direction. One end of the rivet strip tube 6 passes through the push rod 31 and abuts against the jaw 35, while the other end of the rivet strip tube 6 exits the linear motion assembly. In this way, the broken rivet rod remains inside the rivet strip tube 6. The old broken rivet rod is expelled from the rivet strip tube 6 by the pressure of a new broken rivet rod against it. The rivet strip tube 6 is connected to the outside of the rivet gun, thus allowing the broken rivet rod to be removed.

[0037] In some embodiments, the linear motion assembly includes a lead screw 22 and a nut 23. The lead screw 22 has a through hole, the extension direction of which is the same as the axial direction of the lead screw 22. The pin pack tube 6 is inserted into the through hole or the broken rivet rod is discharged directly through the through hole. The lead screw 22 is threadedly connected to the nut 23 so that the lead screw 22 can move linearly relative to the nut 23.

[0038] Specifically, the power structure 2 includes a driven gear 24 and a driving gear 25. The driven gear 24 is fixedly connected to the nut 23. The rotation of the driven gear 24 causes the nut 23 to rotate together with the driven gear 24. The power component 21 is a motor. The driving gear 25 is connected to the motor. The driven gear 24 meshes with the driving gear 25. In this way, the power component 21 drives the driving gear 25 to rotate, and the driving gear 25 drives the driven gear 24 to rotate. The nut 23 rotates with the driven gear 24, and the lead screw 22 moves in a straight line relative to the nut 23. This achieves the purpose of the lead screw 22 pulling the pull head sleeve 32 relative to the clamp 35 to clamp and pull the rivet.

[0039] Furthermore, the nut 23 and the driven gear 24 are an integral structure, which can prevent the nut 23 and the driven gear 24 from loosening and ensure that the nut 23 always rotates together with the driven gear 24.

[0040] To facilitate the direct removal of broken rivet rods, in some embodiments, the rivet gun also includes a vacuum pump 7, which is connected to the end of the rivet tube 6 away from the gun sleeve 11. The vacuum pump 7 provides negative pressure to the rivet tube 6, so that the broken rivet rod can be attracted away from the clamp 35.

[0041] The rivet gun provided by this utility model can complete the actions of pre-tightening, breaking, and rivet placement, and can operate stably for a long time without easily malfunctioning or being damaged. This rivet gun can simultaneously collect pre-tightening force and breaking force. Based on the accurate breaking force collected by the rivet gun, the break point location of the rivet can be monitored. The flatness of the rivet flange surface and the expansion diameter can be determined by the rivet break point location. Rivets tested by the rivet gun do not suffer from insufficient breaking force, which could lead to poor sealing and battery failure. This rivet gun is compatible with rivets of 30mm-38mm in length, and has high riveting efficiency: pre-tightening in 0.5 seconds, breaking in 1.5 seconds, and rivet placement in 3 seconds.

[0042] Furthermore, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A rivet gun, characterized in that, include: The outer casing (1) includes a holster (11), a locking member (12) and a casing body (13), wherein the holster (11) extends into the locking member (12) and is connected to the casing body (13) through the locking member (12), and the holster (11) has a rivet insertion port; The power structure (2) is located in the cavity formed by the shell body (13). The power structure (2) includes a power component (21), a linear motion component and a transmission component. The power component (21) is connected to the linear motion component through the transmission component. A rivet structure (3) is located in the cavity formed by the holster (11), and the rivet structure (3) is connected to the linear motion assembly; A tensile force detection component (4) is sleeved on the linear motion component and disposed in the cavity formed by the shell body (13). The tensile force detection component (4) includes a pressure sensor (42) and a pressure-bearing sleeve (41). The pressure-bearing sleeve (41) is disposed between the pressure sensor (42) and the gun sleeve (11) and abuts against the gun sleeve (11). The pressure-bearing sleeve (41) can contact the pressure sensor (42).

2. The rivet gun according to claim 1, characterized in that, The pressure sensor (42) and the pressure-bearing sleeve (41) are spaced apart.

3. The rivet gun according to claim 1, characterized in that, A first sealing structure (5) is provided between the pressure-bearing sleeve (41) and the linear motion assembly.

4. The rivet gun according to claim 3, characterized in that, The first sealing structure (5) includes an oil seal.

5. The rivet gun according to any one of claims 1-4, characterized in that, The locking member (12) includes a limiting ring (121) and a connecting sleeve (122) fixedly connected to the limiting ring (121). The connecting sleeve (122) is disposed on the side of the limiting ring (121) facing the tensile detection component (4). One end of the gun sleeve (11) is located inside the connecting sleeve (122) and mutually limited by the limiting ring (121) along the axial direction of the gun sleeve (11). The connecting sleeve (122) is fixedly connected to the shell body (13).

6. The rivet gun according to any one of claims 1-4, characterized in that, The riveting structure (3) includes a push rod (31), a pull head sleeve (32), a push rod pull sleeve (33), an elastic element (34), and at least two grippers (35). The two ends of the push rod pull sleeve (33) are connected to the linear motion component and the pull head sleeve (32), respectively. One end of the gripper (35) is disposed inside the pull head sleeve (32), and the other end protrudes from the pull head sleeve (32). The push rod (31) abuts against the other end of the gripper (35). The two ends of the elastic element (34) abut against the bottom of the groove of the push rod (31) and the push rod pull sleeve (33), respectively. The elastic element (34) always has the tendency to push the push rod (31) toward the gripper (35).

7. The rivet gun according to claim 6, characterized in that, The pull head sleeve (32) has a conical hole, and the gripper (35) has a wedge-shaped structure. The side wall of the gripper (35) fits against the wall of the conical hole.

8. The rivet gun according to claim 6, characterized in that, The rivet gun also includes a pin bar (6), which is inserted through the linear moving assembly along the axial direction of the linear moving assembly. One end of the pin bar (6) passes through the push rod (31) and abuts against the clamp (35), while the other end of the pin bar (6) exits the linear moving assembly.

9. The rivet gun according to claim 8, characterized in that, It also includes a vacuum pump (7), which is connected to the end of the nail tube (6) away from the holster (11).

10. The rivet gun according to any one of claims 1-4, characterized in that, The linear motion assembly includes a lead screw (22) and a nut (23). The lead screw (22) has a through hole, the extension direction of which is the same as the axial direction of the lead screw (22). The lead screw (22) is threadedly connected to the nut (23).

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