A rivet nut gun

Abstract

The utility model discloses a rivet nut gun, including the casing and the connecting sleeve, screw nut, motor and rotating shaft that set in its inside along the rivet direction in proper order, the connecting sleeve's connecting axle one end rotatable connection has the screw rod, screw nut and rotating shaft rotatable installation in the casing, screw nut is connected with the screw rod screw thread, and is connected with motor drive, rotating shaft outer rotating cover is connected with transmission gear cover, and the axial recess is seted up on rotating shaft outer peripheral wall, and the transmission axle is established between rotating shaft and connecting sleeve, transmission axle one end passes through the axial hole of screw rod and is connected with the connecting axle, and the other end is slidably clamped in the axial center hole of rotating shaft, and transmission gear cover one end outer along is connected with motor drive, and the other end peripheral wall is seted up with the radial through -hole and the end outer peripheral cover is equipped with the lantern ring, and the spring is equipped in the radial through -hole, and the spring one end is abutted with the lantern ring inner ring, and the other end is suitable for through the steel ball and rotating shaft's cylindrical surface or with the axial recess abutment. The utility model discloses simple structure is convenient for maintenance.

Description

Technical Field

[0001] This utility model relates to the field of electric riveting technology, specifically to a rivet nut gun. Background Technology

[0002] Riveting tools are specialized tools for installing rivets and nuts. They include pneumatic and electric rivet guns. Pneumatic rivet guns offer advantages such as speed and high pulling force, but they cannot be used outdoors without an air supply. Electric rivet guns, on the other hand, can be used normally outdoors.

[0003] Currently, electric riveting guns offer two riveting methods: one relies entirely on rotation, which can easily damage the rivet nut; the other involves rotating the rivet nut into position and then pulling it vertically. The electric riveting gun's mechanism for screwing the rivet nut in and out does not stall, making it widely used.

[0004] In existing technologies, electric rivet guns that use a vertical riveting method after the rivet nut is rotated into place are relatively common. Existing technologies require a clutch mechanism to connect or disconnect the screwing, riveting, and retraction functions during the rivet nut operation. The entire clutch mechanism is constrained by limited space, resulting in an extremely complex structure that is prone to failure and cannot be quickly resolved on-site, severely impacting operational efficiency. Utility Model Content

[0005] This utility model proposes a rivet nut gun to solve the technical problem that existing rivet nut guns have complex clutch mechanisms, making them inconvenient to maintain.

[0006] This utility model discloses a rivet nut gun, which includes a housing and a connecting sleeve, a lead screw nut, a motor and a rotating shaft arranged sequentially in the housing along the riveting direction; The connecting shaft of the connecting sleeve extends along the riveting direction, and a riveting screw is installed at one end of the connecting shaft, while a lead screw is rotatably connected to the other end. Both the lead screw nut and the rotating shaft extend along the riveting direction and are rotatably mounted in the housing; the inner hole of the lead screw nut is threadedly connected to the lead screw, and its outer edge is connected to the motor drive via a gear shaft; A transmission gear sleeve is rotatably fitted onto the outside of the rotating shaft, and an axial groove is provided on the outer peripheral wall of the rotating shaft; a transmission shaft is provided between the rotating shaft and the connecting sleeve; the transmission shaft passes through the axial hole of the lead screw, one end of which is connected to the connecting shaft, and the other end is slidably locked in the axial center hole of the rotating shaft; The outer edge of one end of the transmission gear sleeve meshes with the gear shaft; a radial through hole is formed on the peripheral wall of the other end of the transmission gear sleeve, and a collar is fitted around the outer periphery of this end; a spring is installed inside the radial through hole, one end of the spring abuts against the inner ring of the collar, and the other end is adapted to abut against the cylindrical surface of the rotating shaft through a steel ball, or abut against the axial groove through a steel ball. The cooperation of the steel ball, transmission gear sleeve, spring, and collar realizes the function of a clutch mechanism, thereby meeting the needs of screwing in, riveting, and unriveting during the connection or separation of rivet nuts, and the structure is simple and easy to maintain.

[0007] Optionally, the gear shaft extends along the riveting direction; The lead screw nut, the gear shaft, and the motor are arranged in sequence along the radial direction of the lead screw nut; the end of the motor away from the connecting sleeve is the output end equipped with an output gear; The gear shaft is provided with a first gear, a second gear and a third gear in sequence along the riveting direction; The first gear meshes with the outer edge of the lead screw nut; The second gear meshes with the output gear; The third gear meshes with the outer edge of the transmission gear sleeve.

[0008] Optionally, the first gear is disposed at one end of the gear shaft; the second gear and the third gear form a double-layer gear structure, which is disposed at the other end of the gear shaft. This design saves space.

[0009] Optionally, the connecting sleeve includes a first cylindrical body, a connecting shaft, and a second cylindrical body arranged sequentially along the riveting direction; One end of the connecting shaft is fixedly connected to the rivet screw through the first cylinder; The second cylinder is sleeved on the outer periphery of the other end of the connecting shaft. The second cylinder is rotatably and slidably connected to the connecting shaft, and a limiting protrusion is provided at the end of the connecting shaft away from the first cylinder to prevent the connecting shaft from separating from the second cylinder. The end of the second cylinder away from the connecting shaft is fixedly connected to the lead screw; The drive shaft passes through the lead screw and the second cylinder in sequence, and is connected to the connecting shaft.

[0010] Optionally, the housing is gun-shaped and includes a body, a gun barrel, and a mounting frame installed in the inner cavity of the body; One end of the gun head barrel is placed inside the machine body and is threadedly connected to the mounting frame; the other end of the gun head barrel extends outside the machine body and is equipped with a rivet head. The connecting sleeve is placed inside the gun head cylinder, and the rivet screw passes through the rivet head and extends to the outside of the rivet head.

[0011] Optionally, the mounting frame includes a first bearing housing, a second bearing housing, a housing, a cover plate, and an end cap connected sequentially along the riveting direction; The two ends of the lead screw nut are rotatably mounted in the machine body through the first bearing seat and the second bearing seat respectively; the four corners of the first bearing seat and the second bearing seat are fixedly connected by bolts; The end of the lead screw away from the connecting sleeve extends into the housing; One end of the gear shaft is mounted on the first bearing seat via a bushing, and the other end is mounted on the cover plate via a bushing. The cover plate and the end cap form a mounting cavity, and the two ends of the rotating shaft are rotatably mounted on the cover plate and the end cap, respectively. The transmission gear sleeve and the collar are both placed within the mounting cavity. The end cap is adapted to limit the collar in the riveting direction. This design prevents the collar from detaching from the transmission gear sleeve.

[0012] Optionally, the rivet gun further includes a controller and a power supply; Both the controller and the power supply are located inside the machine body, specifically at the gun handle of the machine body. A mounting base is fixed to the outer periphery of the end of the lead screw away from the connecting sleeve. A magnetic rod is provided on the mounting base, and the mounting base is placed in the inner cavity of the outer shell. The inner cavity of the outer casing is also fitted with a Hall sensor element; The controller is connected to the Hall sensor and is adapted to control the motor to reverse or stop operating based on the cooperation relationship between the magnet rod and the Hall sensor.

[0013] Optionally, the mounting base is provided with a micro switch, and a push plate that cooperates with the micro switch is fixed on the drive shaft; The micro switch is connected to the controller, which is adapted to control the riveting action of the rivet nut gun according to the cooperation relationship between the micro switch and the push plate.

[0014] Optionally, the inner cavity of the outer casing is provided with a sliding groove, which extends along the riveting direction; The mounting base is equipped with rollers that slide in conjunction with the groove. This design ensures smooth sliding of the mounting base.

[0015] Optionally, the axial center hole of the rotating shaft is an internal hexagonal hole, and the end of the transmission shaft is provided with an external hexagonal protrusion that matches the internal hexagonal hole. This design prevents relative rotation between the rotating shaft and the transmission shaft.

[0016] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art: The clutch mechanism functions through the cooperation of steel balls, a transmission gear sleeve, a spring, and a collar, thereby meeting the needs of screwing in, riveting, and unscrewing during the connection or separation of rivet nuts. This rivet nut gun has a simple structure, and the steel balls, transmission gear sleeve, spring, and collar are located at the rear of the gun for easy maintenance.

[0017] The above description of the disclosed content and the following description of the embodiments are intended to demonstrate and explain the spirit and principle of the present invention, and to provide a further explanation of the scope of the patent application of the present invention. Attached Figure Description

[0018] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the rivet nut gun in this utility model; Figure 2 This is a cross-sectional view of the internal structure of the rivet nut gun in this utility model; Figure 3 This is a schematic diagram of the internal structure of the rivet nut gun in this utility model; Figure 4 This is a partial cross-sectional schematic diagram of the internal structure of the rivet nut gun in this utility model; Figure 5 This is a schematic diagram showing the engagement of the transmission gear sleeve and the collar in this utility model; Figure 6 This is an exploded view of the transmission gear sleeve, collar, spring, and steel ball in this utility model.

[0020] Explanation of icon numbers: 1. Housing; 101. Body; 102. Gun head barrel; 103. First bearing seat; 104. Second bearing seat; 105. Outer shell; 106. Cover plate; 107. End cover; 2. Riveting screw; 3. Connecting sleeve; 301. First cylinder; 302. Connecting shaft; 303. Second cylinder; 4. Lead screw; 401. Mounting base; 402. Magnet rod; 403. Hall effect sensor; 404. Micro switch; 405. Roller; 5. Lead screw nut; 6. Gear shaft; 7. Motor; 8. Rotating shaft; 801. Axial groove; 802. Internal hexagonal hole; 9. Transmission gear sleeve; 901. Radial through hole; 10. Collar; 11. Spring; 12. Steel ball; 13. Transmission shaft; 14. Riveting head; 15. Push plate. Detailed Implementation

[0021] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model will be presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. To provide a deep understanding of this utility model, many specific details will be included in the following description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0022] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model and simplifying the description, 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 the utility model.

[0023] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0024] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided with," "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0025] This application discloses a rivet nut gun for installing rivets. In this embodiment, the rivet nut gun is an electric rivet nut gun. The rivet nut gun operates in a front-to-back direction. The gun head is located at the front end of the rivet nut gun, and the gun handle is located at the lower end of the rivet nut gun.

[0026] Please see Figures 1-4As shown, the rivet nut gun includes a housing 1, a connecting sleeve 3, a lead screw nut 5, a motor 7, and a rotating shaft 8. The connecting sleeve 3, the lead screw nut 5, the motor 7, and the rotating shaft 8 are arranged sequentially along the riveting direction and are all housed within the housing 1. In this embodiment, the connecting sleeve 3, the lead screw nut 5, the motor 7, and the rotating shaft 8 are arranged sequentially from front to back.

[0027] The connecting sleeve 3 extends along the riveting direction. In this embodiment, the connecting sleeve 3 includes a first cylindrical body 301, a connecting shaft 302, and a second cylindrical body 303 arranged sequentially along the riveting direction. The connecting shaft 302 extends along the riveting direction. One end of the connecting shaft 302 is fixedly connected to the riveting screw 2 via the first cylindrical body 301. The second cylindrical body 303 is sleeved on the outer periphery of the other end of the connecting shaft 302. The second cylindrical body 303 is rotatably slidably connected to the connecting shaft 302, and a limiting protrusion is provided at the end of the connecting shaft 302 away from the first cylindrical body 301 to prevent the connecting shaft 302 from separating from the second cylindrical body 303. The end of the second cylindrical body 303 away from the connecting shaft 302 is fixedly connected to the lead screw 4.

[0028] In this embodiment, the inner bore of the second cylinder 303 includes a small-diameter section and a large-diameter section. The small-diameter section is located at the end of the second cylinder 303 closest to the connecting shaft 302, i.e., in front of the large-diameter section. The small-diameter section is rotatably slidably connected to the outer periphery of the connecting shaft 302. A limiting protrusion is placed inside the large-diameter section and is rotatably slidably connected to it.

[0029] Both the lead screw nut 5 and the rotating shaft 8 extend along the riveting direction and are rotatably mounted within the housing 1. The inner hole of the lead screw nut 5 is threadedly connected to the lead screw 4, and the outer edge of the lead screw nut 5 is connected to the motor 7 via a gear shaft 6. Specifically, the gear shaft 6 extends along the riveting direction. The lead screw nut 5, gear shaft 6, and motor 7 are distributed sequentially along the radial direction of the lead screw nut 5. In this embodiment, the lead screw nut 5, gear shaft 6, and motor 7 are distributed sequentially from top to bottom.

[0030] A transmission gear sleeve 9 is rotatably fitted onto the rotating shaft 8. An axial groove 801 is formed on the outer peripheral wall of the rotating shaft 8. A transmission shaft 13 is provided between the rotating shaft 8 and the connecting sleeve 3. The transmission shaft 13 passes through the axial hole of the lead screw 4, and one end of the transmission shaft 13 passes through the lead screw 4 and the second cylinder 303 in sequence, and is connected to the connecting shaft 302. The other end of the transmission shaft 13 is slidably locked in the axial center hole of the rotating shaft 8. In this embodiment, the axial center hole of the rotating shaft 8 is an internal hexagonal hole 802. The end of the transmission shaft 13 is provided with an external hexagonal protrusion that matches the internal hexagonal hole 802.

[0031] The transmission gear sleeve 9 has a gear structure along its outer edge near the connecting sleeve 3, and this gear structure meshes with the gear shaft 6. (See also...) Figures 5-6As shown, a radial through hole 901 is provided on the peripheral wall of the other end of the transmission gear sleeve 9, and a collar 10 is fitted around the outer periphery of this end. A spring 11 is provided inside the radial through hole 901. One end of the spring 11 abuts against the inner ring of the collar 10, and the other end of the spring 11 is adapted to abut against the cylindrical surface of the rotating shaft 8 through a steel ball 12, or abut against the axial groove 801 through a steel ball 12.

[0032] Please see Figures 2-4 As shown, the end of the motor 7 furthest from the connecting sleeve 3 is the output end, which is equipped with an output gear. A first gear, a second gear, and a third gear are sequentially arranged on the gear shaft 6 along the riveting direction. The first gear meshes with the outer edge of the lead screw nut 5. The second gear meshes with the output gear. The third gear meshes with the outer edge of the transmission gear sleeve 9.

[0033] Preferably, the first gear is located at the front of the motor 7, and the second and third gears are located at the rear of the motor 7. The first gear is located at the front end of the gear shaft 6. The second and third gears form a double-layer gear structure, with the second gear being the larger gear and the third gear being the smaller gear. The double-layer gear structure is located at the rear end of the gear shaft 6.

[0034] Please see Figures 1-4 As shown, the housing 1 is gun-shaped and includes a body 101, a gun head barrel 102, and a mounting frame. The mounting frame is installed inside the body 101. The gun head barrel 102 is located at the front end of the body 101, in front of the mounting frame. The rear end of the gun head barrel 102 is located inside the body 101 and is threadedly connected to the mounting frame. The front end of the gun head barrel 102 extends outside the body 101 and is fitted with a rivet head 14. A connecting sleeve 3 is located inside the gun head barrel 102. The front end of the rivet screw 2 passes through the rivet head 14 and extends outside the rivet head 14.

[0035] Among them, the rivet screw 2, the rivet head 14 and the connecting sleeve 3 are all existing technologies, so they will not be described in detail.

[0036] Furthermore, the mounting frame includes a first bearing housing 103, a second bearing housing 104, a housing 105, a cover plate 106, and an end cap 107 connected sequentially along the riveting direction, with adjacent components connected by bolts. Specifically, the two ends of the lead screw nut 5 are rotatably mounted within the machine body 101 via the first bearing housing 103 and the second bearing housing 104, respectively. The four corners of the first bearing housing 103 and the second bearing housing 104 are fixedly connected by bolts so that the outer edge of the lead screw nut 5 is exposed outside the bearing housing.

[0037] The outer casing 105 is fixed inside the machine body 101. The end of the lead screw 4 away from the connecting sleeve 3 extends rearward into the outer casing 105. One end of the gear shaft 6 is mounted on the first bearing seat 103 via a bushing, and the other end of the gear shaft 6 is mounted on the cover plate 106 via a bushing. The second bearing seat 104 and the outer casing 105 are both positioned above the gear shaft 6. The cover plate 106 and the end cover 107 form a mounting cavity. The two ends of the rotating shaft 8 are rotatably mounted on the cover plate 106 and the end cover 107, respectively. The transmission gear sleeve 9 and the collar 10 are both placed within the mounting cavity. The end cover 107 is adapted to limit the collar 10 in the riveting direction to prevent the collar 10 from accidentally separating from the transmission gear sleeve 9.

[0038] In this embodiment, the motor 7 is mounted on the cover plate 106, and the output end of the motor 7 extends to the rear of the cover plate 106.

[0039] Furthermore, the rivet gun also includes a controller and a power supply. Both the controller and the power supply are located inside the body 101, specifically at the handle of the body 101. Additionally, a trigger connected to the controller is located at the handle of the body 101.

[0040] Specifically, a mounting base 401 is fixed to the outer periphery of the end of the lead screw 4 furthest from the connecting sleeve 3. A magnetic rod 402 is mounted on the mounting base 401. The mounting base 401 is located inside the cavity of the housing 105. A Hall effect sensor 403 is also inserted into the cavity of the housing 105. A controller is connected to the Hall effect sensor 403, and the controller is adapted to control the motor 7 to reverse or stop operation based on the cooperation relationship between the magnetic rod 402 and the Hall effect sensor 403, thereby adapting to different riveting work requirements. The cooperation between the magnetic rod 402 and the Hall effect sensor 403 in a rivet nut gun is existing technology and will not be described in detail here.

[0041] Furthermore, a micro switch 404 is also provided on the mounting base 401. A push plate 15 that cooperates with the micro switch 404 is fixed on the drive shaft 13. The free end of the push plate 15 extends radially along the drive shaft 13. When the drive shaft 13 rotates, the push plate 15 rotates synchronously. In this embodiment, the micro switch 404 is located on the upper part of the mounting base 401 and has an elastic contact end that cooperates with the free end of the push plate 15. The micro switch 404 is connected to a controller, which is adapted to control the riveting action of the rivet gun according to the cooperation relationship between the micro switch 404 and the push plate 15.

[0042] The micro switch 404, in conjunction with the push plate 15, is used in a rivet gun, which is existing technology and will not be described in detail here. The application of the micro switch 404 and the push plate 15 is described in detail in a Chinese patent with publication number CN111571508A, titled "A Brushless Motor Riveting Tool with Multi-Level Adjustable Stroke and Riveting Force."

[0043] Furthermore, to ensure smooth sliding of the mounting base 401, a sliding groove is provided in the inner cavity of the outer shell 105. The sliding groove is distributed on the left and right sides of the outer shell 105 and extends along the riveting direction. The mounting base 401 is provided with rollers 405 that slide in cooperation with the sliding groove.

[0044] The working principle of the rivet gun in this embodiment is as follows: Riveting action: When the rivet nut is not fitted onto the rivet screw 2, one end of the spring 11 abuts against the inner ring of the collar 10, and the other end of the spring 11 abuts against the corresponding axial groove 801 through the steel ball 12. The micro switch 404 contacts the push plate 15, and the rear end face of the first cylinder 301 and the front end face of the second cylinder 303 are spaced apart.

[0045] When the rivet nut is just put back onto the front end of the rivet screw 2, the rivet nut pushes the first cylinder 301, the connecting shaft 302 and the transmission shaft 13 to move backward in sequence. At this time, the second cylinder 303 and the lead screw 4 are stationary. Therefore, the transmission shaft 13 drives the push plate 15 to separate from the micro switch 404.

[0046] When the push plate 15 separates from the micro switch 404, the rear end face of the first cylinder 301 abuts against the front end face of the second cylinder 303. Simultaneously, the controller, based on the interaction between the micro switch 404 and the push plate 15, controls the motor 7 to rotate forward. The forward-rotating motor 7 drives the lead screw nut 5 and the transmission gear sleeve 9 to rotate via the gear shaft 6. The lead screw nut 5 is threadedly engaged with the lead screw 4, causing the lead screw 4 to drive the rivet screw 2 backward through the connecting sleeve 3. Specifically, the lead screw 4 initially only drives the second cylinder 303 backward, so that the rear end face of the first cylinder 301 and the front end face of the second cylinder 303 are spaced apart. During this process, the first cylinder 301, the connecting shaft 302, and the transmission shaft 13 do not move in the forward-backward direction. When the small-diameter end face of the second cylinder 303 abuts against the limiting protrusion, the lead screw 4 can drive the first cylinder 301, the connecting shaft 302 and the transmission shaft 13 to move backward through the small-diameter end face of the second cylinder 303.

[0047] During the backward movement of the second cylinder 303, the steel ball 12 is placed in the corresponding axial groove 801. Through the cooperation of the steel ball 12, the spring 11 and the axial groove 801, the transmission gear sleeve 9 drives the rotating shaft 8 to rotate through the steel ball 12. The rotating shaft 8 drives the rivet screw 2 to rotate through the connecting sleeve 3, thereby causing the rivet nut to be screwed into the rivet screw 2.

[0048] When the rivet nut is fully screwed into the rivet screw 2, that is, when the riveting action is finished, the rear end face of the rivet nut just abuts against the front end face of the rivet head 14, and the free end of the push plate 15 just rotates to face upward and contacts the micro switch 404. The controller controls the motor 7 to stop rotating according to the cooperation relationship between the micro switch 404 and the push plate 15.

[0049] Riveting Action: The worker inserts the rivet screw 2, equipped with a rivet nut, into the joint to be riveted. Then, the trigger is pressed to cause the controller to rotate the motor 7 forward. The motor 7 drives the lead screw nut 5 and the transmission gear sleeve 9 to rotate via the gear shaft 6. The lead screw nut 5 is threaded onto the lead screw 4, causing the lead screw 4 to drive the rivet screw 2 backward via the connecting sleeve 3. Simultaneously, because the rear end of the rivet nut abuts against the front end of the rivet head 14, the friction between the rivet nut and the rivet head 14 obstructs the rotation of the rotating shaft 8, causing the steel ball 12 to tend to separate from the corresponding axial groove 801. Therefore, at this time, the transmission gear sleeve 9 causes the steel ball 12 to slide onto the cylindrical surface of the rotating shaft 8, i.e., the spring 11 abuts against the cylindrical surface of the rotating shaft 8 via the steel ball 12. Therefore, the transmission gear sleeve 9 cannot drive the rotating shaft 8 to rotate via the steel ball 12; the steel ball 12 only slips on the cylindrical surface of the rotating shaft 8.

[0050] Since the rotating shaft 8 does not rotate, the rivet screw 2 does not rotate. Therefore, during the riveting operation, the rivet screw 2 only moves backward and does not rotate.

[0051] During this period, the controller is adapted to control the operation of the motor 7 according to the cooperation relationship between the magnet rod 402 and the Hall sensing element 403, thereby controlling the distance of the rivet screw 2 moving backward to adapt to different rivet requirements.

[0052] Riveting Removal Action: After the riveting nut gun completes the riveting action, the controller controls the motor 7 to reverse. The motor 7 drives the lead screw nut 5 and the transmission gear sleeve 9 to rotate via the gear shaft 6. The lead screw nut 5 drives the rivet screw 2 forward, so that the rear end of the rivet nut separates from the front end of the rivet head 14. At this time, there is no friction between the rivet nut and the rivet head 14. When the transmission gear sleeve 9 drives the steel ball 12 to slide into the axial groove 801, due to the lack of friction between the rivet nut and the rivet head 14, the steel ball 12 will be stuck in the axial groove 801. Through the cooperation of the steel ball 12, the spring 11, and the axial groove 801, the transmission gear sleeve 9 drives the rotating shaft 8 to rotate via the steel ball 12. The rotating shaft 8 drives the rivet screw 2 to rotate via the connecting sleeve 3, thereby separating the rivet nut from the rivet screw 2. After the riveting removal action is completed, the micro switch 404 and the push plate 15 also complete their reset, that is, the micro switch 404 contacts the push plate 15.

[0053] In the riveting action, the rotation direction of the rivet screw 2 is opposite to that in the riveting unriveting action.

[0054] This utility model utilizes the cooperation of steel balls, a transmission gear sleeve, a spring, and a collar to achieve the function of a clutch mechanism, thereby meeting the needs of screwing in, riveting, and retracting during the connection or separation of rivet nuts. This rivet nut gun has a simple structure, and the steel balls, transmission gear sleeve, spring, and collar are located at the gun tail for easy maintenance.

[0055] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A rivet nut gun, characterized in that, It includes a housing (1) and a connecting sleeve (3), a lead screw nut (5), a motor (7) and a rotating shaft (8) arranged sequentially in the housing (1) along the riveting direction; The connecting shaft (302) of the connecting sleeve (3) extends along the riveting direction. One end of the connecting shaft (302) is equipped with a riveting screw (2), and the other end is rotatably connected to a lead screw (4). The lead screw nut (5) and the rotating shaft (8) both extend along the riveting direction and are rotatably installed in the housing (1); the inner hole of the lead screw nut (5) is threaded to the lead screw (4), and its outer edge is connected to the motor (7) through the gear shaft (6); A transmission gear sleeve (9) is rotatably sleeved on the outside of the rotating shaft (8), and an axial groove (801) is provided on the outer peripheral wall of the rotating shaft (8); a transmission shaft (13) is provided between the rotating shaft (8) and the connecting sleeve (3); the transmission shaft (13) passes through the axial hole of the lead screw (4), one end of which is connected to the connecting shaft (302), and the other end is slidably locked in the axial center hole of the rotating shaft (8); The outer edge of one end of the transmission gear sleeve (9) meshes with the gear shaft (6); a radial through hole (901) is provided on the peripheral wall of the other end of the transmission gear sleeve (9), and a collar (10) is sleeved on the outer periphery of this end; a spring (11) is provided in the radial through hole (901), one end of the spring (11) abuts against the inner ring of the collar (10), and the other end is adapted to abut against the cylindrical surface of the rotating shaft (8) through a steel ball (12), or abut against the axial groove (801) through a steel ball (12).

2. The rivet nut gun according to claim 1, characterized in that, The gear shaft (6) extends along the riveting direction; The lead screw nut (5), the gear shaft (6), and the motor (7) are arranged in sequence along the radial direction of the lead screw nut (5); the end of the motor (7) away from the connecting sleeve (3) is the output end with an output gear. The gear shaft (6) is provided with a first gear, a second gear and a third gear in sequence along the riveting direction; The first gear meshes with the outer edge of the lead screw nut (5); The second gear meshes with the output gear; The third gear meshes with the outer edge of the transmission gear sleeve (9).

3. The rivet nut gun according to claim 2, characterized in that, The first gear is disposed at one end of the gear shaft (6); the second gear and the third gear constitute a double-layer gear structure, which is disposed at the other end of the gear shaft (6).

4. The rivet nut gun according to claim 1, characterized in that, The connecting sleeve (3) includes a first cylindrical body (301), a connecting shaft (302), and a second cylindrical body (303) arranged sequentially along the riveting direction; One end of the connecting shaft (302) is fixedly connected to the rivet screw (2) through the first cylinder (301); The other end of the connecting shaft (302) is fitted with the second cylinder (303), the second cylinder (303) and the connecting shaft (302) are rotatably slidably connected, and the end of the connecting shaft (302) away from the first cylinder (301) is provided with a limiting protrusion to prevent the connecting shaft (302) from separating from the second cylinder (303); The end of the second cylinder (303) away from the connecting shaft (302) is fixedly connected to the lead screw (4); The drive shaft (13) passes through the lead screw (4) and the second cylinder (303) in sequence, and is connected to the connecting shaft (302).

5. The rivet nut gun according to claim 1, characterized in that, The housing (1) is gun-shaped and includes a body (101), a gun barrel (102), and a mounting frame installed in the inner cavity of the body (101); One end of the gun head barrel (102) is placed inside the body (101) and threadedly connected to the mounting frame; the other end of the gun head barrel (102) extends outside the body (101) and is fitted with a rivet head (14). The connecting sleeve (3) is placed inside the gun head tube (102), and the rivet screw (2) passes through the rivet head (14) and extends to the outside of the rivet head (14).

6. The rivet nut gun according to claim 5, characterized in that, The mounting frame includes a first bearing seat (103), a second bearing seat (104), a housing (105), a cover plate (106), and an end cap (107) connected sequentially along the riveting direction. The two ends of the lead screw nut (5) are rotatably mounted in the machine body (101) through the first bearing seat (103) and the second bearing seat (104) respectively; the four corners of the first bearing seat (103) and the second bearing seat (104) are fixedly connected by bolts; The end of the lead screw (4) away from the connecting sleeve (3) extends into the housing (105); One end of the gear shaft (6) is mounted on the first bearing seat (103) via a bushing, and the other end is mounted on the cover plate (106) via a bushing. The cover plate (106) and the end cap (107) form a mounting cavity. The two ends of the rotating shaft (8) are rotatably mounted on the cover plate (106) and the end cap (107), respectively. The transmission gear sleeve (9) and the collar (10) are both placed in the mounting cavity. The end cap (107) is adapted to limit the collar (10) in the riveting direction.

7. The rivet nut gun according to claim 6, characterized in that, It also includes the controller and power supply; Both the controller and the power supply are located inside the body (101), at the gun handle of the body (101); The lead screw (4) is fixed with a mounting base (401) on the outer periphery of one end away from the connecting sleeve (3). A magnet rod (402) is provided on the mounting base (401). The mounting base (401) is placed in the inner cavity of the outer shell (105). The inner cavity of the outer casing (105) is also fitted with a Hall sensor element (403). The controller is connected to the Hall sensor (403), and the controller is adapted to control the motor (7) to reverse or stop operating according to the cooperation relationship between the magnet rod (402) and the Hall sensor (403).

8. The rivet nut gun according to claim 7, characterized in that, The mounting base (401) is provided with a micro switch (404), and the drive shaft (13) is fixed with a push plate (15) that cooperates with the micro switch (404). The micro switch (404) is connected to the controller, which is adapted to control the riveting action of the rivet nut gun according to the cooperation relationship between the micro switch (404) and the push plate (15).

9. The rivet nut gun according to claim 7, characterized in that, The inner cavity of the outer shell (105) is provided with a sliding groove, which extends along the riveting direction; The mounting base (401) is provided with a roller (405) that slides in cooperation with the groove.

10. The rivet nut gun according to claim 1, characterized in that, The axial center hole of the rotating shaft (8) is an internal hexagonal hole (802), and the end of the transmission shaft (13) is provided with an external hexagonal protrusion that matches the internal hexagonal hole (802).

Images