A DC rivet gun

Abstract

The present application discloses a DC rivet gun, which belongs to the technical field of riveting tools, and includes: a device body, a stroke detection mechanism, a rivet mechanism, a pressure detection mechanism, a water cooling mechanism and a dustproof mechanism. A handle is installed on the top of the device body, a trigger is embedded on one side of the handle, and the trigger is used to control the switch. A shell is arranged on the top of the handle, and a power cord is arranged at one end of the shell. The beneficial effects of the present application are as follows: when the rivet is pulled out, the four sealing blocks inside the shell will rotate around the connection with the connecting ring under the push of the third spring, so that the four sealing blocks will close together. When the four sealing blocks are closed, they will fit tightly with each other, so that the hole slot at one end of the shell for inserting the rivet will be closed, which is conducive to preventing external dust particles from entering the interior of the rivet gun through the hole slot at one end of the shell, so that the device can play a dustproof effect without affecting the use.

Description

Technical Field

[0001] The present application relates to the technical field of riveting tools, and in particular to a DC rivet gun. Background Art

[0002] A rivet gun is a tool used to fasten rivets to materials, usually used to connect metal sheets. It works by pulling the tail of the rivet tight to form a tight connection between the sheets.

[0003] After searching, the Chinese patent authorization number CN207563672U discloses a rivet gun. Although the rivet gun uses a Hall element to count the number of rotations of the brushless motor, and controls the travel distance of the screw assembly by the number of rotations of the brushless motor, that is, the screw assembly is directly regulated by the brushless motor, the control is timely and the response is fast, and the screw assembly stroke can be adjusted according to the rivet model to shorten the working time of each stroke, which can effectively improve the work efficiency. However, the front end of the rivet gun is open for rivet insertion. When the rivet gun is not in use, external dust will enter the interior through the open channel at the front end of the rivet gun. After the external dust particles enter the interior of the rivet gun, they will adhere to the outer wall of the screw, which will increase the friction of the screw and increase the temperature during operation, especially under high load or frequent use. The service life of the screw will be shortened.

[0004] After searching, the Chinese patent authorization number CN210359094U discloses a rivet gun. Although the rivet gun is provided with a pressure detection device, a main board and a display screen, when the user uses the rivet gun of the utility model to pull rivets, the pressure detection device will detect the stress condition of the rivet sleeve during the rivet pulling process of the rivet gun and transmit the detected stress condition to the main board in the form of an electrical signal, thereby realizing the detection of the rivet pulling quality of the rivet gun. However, since the locking device of the device is clamped and fixed to the rivet through friction, when sliding occurs between the locking device and the outer wall of the rivet, the device cannot detect whether the rivet is in place, thereby causing the rivet to not be firmly fixed. Summary of the invention

[0005] One of the purposes of the present application is to provide a DC rivet gun to solve the problems that external dust enters the interior of the rivet gun when not in use, resulting in a shortened service life of the rivet gun, and that the rivet cannot be detected when in use, resulting in the rivet being fixed.

[0006] In order to achieve the above purpose, the technical solution adopted in the present application is: a DC rivet gun, comprising: a device body, a stroke detection mechanism, a rivet pulling mechanism, a pressure detection mechanism, a water cooling mechanism and a dustproof mechanism, a handle is installed on the top of the device body, a trigger is embedded on one side of the handle, and the trigger is used to control the switch, a shell is provided on the top of the handle, a power cord is provided at one end inside the shell, the power cord is connected to an external power supply, the other end of the power cord is electrically connected to an inverter bridge power tube, the other end of the inverter bridge power tube is rotatably connected to the internal rotor of a brushless motor, a water cooling mechanism is provided outside one end of the brushless motor, and the other end of the brushless motor is connected to one end of a rotating block through a planetary reduction gear set, the outer wall of the rotating block is rotatably connected to the inside of a bearing, the bearing is embedded in the shell, a rivet pulling mechanism is provided at the other end of the rotating block, a stroke detection mechanism is provided inside the rivet pulling mechanism, a dustproof mechanism is provided at the other end of the rivet pulling mechanism, a pressure detection mechanism is provided on one side of the dustproof mechanism, and the pressure detection mechanism is used to detect the pulling force of rivets.

[0007] Preferably, the riveting mechanism includes a front sleeve threadedly connected to the shell, the interior of the front sleeve is a hollow structure, the inner wall of the front sleeve is in sliding contact with the outer wall of the screw rod, a second spring is embedded in one end of the screw rod, one end of the second spring is provided with a top block, a hole groove is opened in the top block, the other end of the screw rod is threadedly connected to the inner wall of one end of the sliding sleeve, a clamping block is provided inside the sliding sleeve, one end of the clamping block is tightly fitted with one end of the top block, and the planetary reduction gear set is driven to rotate by the brushless motor, and then the planetary reduction gear set drives the rotating block to rotate. When the rotating block rotates, it can drive the screw rod to move backward through the thread, and when the screw rod moves backward, it will drive the sliding sleeve to move backward, and the sliding sleeve will squeeze the clamping block inward through the slope at one end, so that the clamping block can bite with the rivet surface, and at the same time, the rivet is pulled backward with the movement of the screw rod to realize riveting.

[0008] Preferably, three blocks are provided, and tooth-groove structures are provided on the inner surfaces of the three blocks. The outer wall of the block is inclined, and the outer wall of the block is in sliding contact with the inner wall of one end of the sliding sleeve. The contact surface between the sliding sleeve and the block is inclined, and the inner wall of one end of the sliding sleeve is contracted. The contracted structure is conducive to the sliding sleeve being able to squeeze the block inward, so that the block can firmly bite with the rivet surface through the tooth grooves on the surface, thereby improving the firmness of clamping the rivet.

[0009] Preferably, the stroke detection mechanism includes a first pressure sensor which is in sliding contact with the inner wall of the screw rod, a first spring is provided at one end of the first pressure sensor, the outer wall of the first spring is in sliding contact with the inside of the screw rod, and the other end of the first spring is embedded in the middle part of the limit rod, and the bottom end and the top end of the limit rod are in sliding contact with the inner wall of the screw rod, and the screw rod can drive the rivet pulling mechanism to move backward, and the rivet pulling mechanism drives the rivet to pull, so that the tail of the rivet is tightened, and when the rivet is pulled into place, it will contact the first pressure sensor. After detecting the pressure signal, the first pressure sensor feeds back the signal to the display, which is beneficial to detect whether the rivet is pulled into place.

[0010] Preferably, rectangular holes are provided at the bottom and the top of the screw rod, and the length of the rectangular holes at the bottom and the top of the screw rod is consistent with the maximum stroke length of the screw rod. The first pressure sensor is electrically connected to the display, and the display is embedded in the top of the outer wall of the front sleeve. The limit rod is in sliding contact with the rectangular holes at the bottom and the top of the screw rod, so that the limit rod can limit the screw rod, so that the screw rod can only slide in the horizontal direction, thereby preventing the screw rod from rotating with the rotating block.

[0011] Preferably, the dustproof mechanism includes a shell body threadedly connected to one end of the front sleeve, a hole groove is opened at one end of the shell body, and a connecting ring is welded on the inner side of the hole groove at one end of the shell body, one side of the connecting ring is rotatably connected to the sealing block, one side of the sealing block is welded to one end of the third spring, and the other end of the third spring is sleeved on the outside of the positioning block, the positioning block is welded to the inner wall of the shell body, and four sealing blocks are provided, and the four sealing blocks are tightly fitted with each other through rotational cooperation. When the rivet is pulled out, the four sealing blocks inside the shell body will rotate around the connection with the connecting ring under the push of the third spring, so that the four sealing blocks will close with each other, and when the four sealing blocks are closed, they will fit tightly with each other, so that the hole groove at one end of the shell body for inserting the rivet will be closed, which is conducive to preventing external dust particles from entering the inside of the rivet gun through the hole groove at one end of the shell body.

[0012] Preferably, the pressure detection mechanism includes a base welded to one end of the shell, a support block is arranged inside the base, the bottom and top outer walls of the support block are provided with protrusion structures, and the protrusion structures on the outer wall of the support block are in sliding contact with the holes and grooves on the outer wall of the base, and two second pressure sensors are arranged between the support block and the base, the second pressure sensors are electrically connected to the display, a fourth spring is embedded in the base, a hole and groove are provided in the middle part of the support block for inserting rivets, when the rivet is pulled by the riveting mechanism, the tail of the rivet will squeeze the support block, and then the support block will squeeze the second pressure sensor inside the base, the tension on the rivet is detected by the second pressure sensor, and then the signal is fed back to the display, which is conducive to real-time display of the rivet tension and real-time detection of the force condition of the rivet.

[0013] Preferably, the water cooling mechanism includes a water tank embedded in the handle, the water tank is filled with cooling water, and the top of one end of the water tank is connected to one end of a cooling pipe through a micro water pump, the other end of the cooling pipe is connected to the inside of the other end of the water tank, and the outside of the cooling pipe is provided with fins distributed in a ring shape with equal intervals, and the fins are welded to the surface of the cooling pipe. The semiconductor refrigeration sheet is used to cool the cooling water inside the water tank, and the cooled cooling water enters the cooling pipe for circulation under the action of the micro water pump. The cooling water in the cooling pipe can exchange heat with the spiral cooling pipe and the fins, and then exchange heat with the heat inside the outer shell through the fins, which is conducive to the cooling effect.

[0014] Preferably, the cooling tube and the fins are made of a copper-aluminum composite material, and the cooling tube is spirally distributed on the inner wall of the shell. A plurality of semiconductor refrigeration plates are embedded inside the water tank. The semiconductor refrigeration plates are evenly spaced and adjacent semiconductor refrigeration plates are staggered with respect to each other. The fins are helpful in increasing the heat exchange area between the cooling tube and the inside of the shell, thereby helping to improve the cooling effect.

[0015] Preferably, an oil groove is provided on the inner wall of the front sleeve, and the oil groove is in a ring-shaped structure, and a first sealing ring and a second sealing ring are provided on both sides of the oil groove, the inner sides of the first sealing ring and the second sealing ring are tightly fitted with the outer wall of the screw rod, the first sealing ring and the second sealing ring are embedded in the inner wall of the shell, and the top of the oil groove is threadedly connected with the sealing plug, and by opening the sealing plug, lubricating oil can be injected into the oil groove through the hole groove, so that the lubricating oil can lubricate the surface of the screw rod when the screw rod slides, which is beneficial to reducing the wear of the screw rod, and the first sealing ring and the second sealing ring are helpful to avoid leakage of the lubricating oil, and at the same time, dust particles on the outer wall can enter the outside of the screw rod.

[0016] Compared with the prior art, the beneficial effects of this application are:

[0017] (1) When the rivet gun is not in use, the rivet is pulled out, and the four sealing blocks inside the shell are pushed by the third spring to rotate around the connection with the connecting ring, so that the four sealing blocks are closed together. When the four sealing blocks are closed, they are tightly fitted to each other, so that the hole groove at one end of the shell for inserting the rivet is closed, which helps to prevent external dust particles from entering the rivet gun through the hole groove at one end of the shell. When in use, it is only necessary to insert the rivet into the hole groove at one end of the shell for inserting the rivet. When the rivet contacts the sealing block, the third spring is compressed, so that the sealing block can be flipped outward, and the hole groove at one end of the shell can be opened to allow the rivet to be inserted into the rivet mechanism, which helps to make the device dust-proof without affecting the use.

[0018] (2) When using this type of rivet gun, the rivet is inserted into the hole groove at the front end of the shell until the rivet is inserted into the through hole inside the top block, and the brushless motor drives the planetary reduction gear set to rotate, and then the planetary reduction gear set drives the rotating block to rotate. While the rotating block rotates, it can drive the lead screw to move backward through the thread, and then the lead screw can drive the riveting mechanism to move backward. The riveting mechanism drives the rivet to pull, so that the tail of the rivet is tightened. When the rivet is pulled into place, it will contact the first pressure sensor. After the first pressure sensor detects the pressure signal, it will feed the signal back to the display, which is conducive to detecting whether the rivet is pulled into place.

[0019] (3) This rivet gun is advantageously used to cool the cooling water inside the water tank through the semiconductor refrigeration plate. The cooled cooling water enters the cooling pipe for circulation under the action of a micro water pump. The cooling water in the cooling pipe can exchange heat with the spiral cooling pipe and the fins, and then exchange heat with the heat inside the shell through the fins, which is beneficial to achieve a cooling effect, and further helps to reduce the friction of mechanical parts and the heat generated during the operation of the motor, thereby avoiding accelerated wear of parts due to long-term overheating and extending the service life of the tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the internal structure of the present invention.

[0022] Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention.

[0023] Figure 4 It is a structural schematic diagram of the stroke detection mechanism of the present invention.

[0024] Figure 5 It is a schematic diagram of the structure of the pressure detection mechanism of the present invention.

[0025] Figure 6 It is a schematic diagram of the structure of the dustproof mechanism of the present invention.

[0026] Figure 7 It is a schematic diagram of the structure of the water cooling mechanism of the present invention.

[0027] Figure 8 It is a schematic diagram of the structure of the semiconductor refrigeration sheet of the present invention.

[0028] Fig. 9 It is a schematic diagram of the screw rod structure of the present invention.

[0029] Fig.10 It is a schematic diagram of the front cover structure of the present invention.

[0030] In the figure: 1, device body; 2, handle; 3, housing; 4, travel detection mechanism; 401, display; 402, limit rod; 403, first spring; 404, first pressure sensor; 5, riveting mechanism; 501, front sleeve; 502, screw rod; 503, second spring; 504, top block; 505, sliding sleeve; 506, clamping block; 6, pressure detection mechanism; 601, base; 602, support block; 603, fourth spring; 604, second pressure sensor; 7, water cooling mechanism; 70 1. Water tank; 702. Micro water pump; 703. Cooling pipe; 704. Fin; 705. Semiconductor refrigeration plate; 8. Dust-proof mechanism; 801. Shell; 802. Connecting ring; 803. Sealing block; 804. Third spring; 805. Positioning block; 9. Power cord; 10. Trigger; 11. Inverter bridge power tube; 12. Brushless motor; 13. Planetary reduction gear set; 14. Rotating block; 15. Bearing; 16. Sealing plug; 17. Oil tank; 18. First sealing ring; 19. Second sealing ring. DETAILED DESCRIPTION

[0031] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0032] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present application.

[0033] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0034] One of the preferred embodiments of the present application is as follows: Figures 1 to 6As shown, a DC rivet gun includes: a device body 1, a stroke detection mechanism 4, a rivet pulling mechanism 5, a pressure detection mechanism 6, a water cooling mechanism 7 and a dustproof mechanism 8. A handle 2 is installed on the top of the device body 1, and a trigger 10 is embedded on one side of the handle 2. The trigger 10 is used to control the switch. A shell 3 is arranged on the top of the handle 2, and a power cord 9 is arranged at one end inside the shell 3. The power cord 9 is connected to an external power supply, and the other end of the power cord 9 is electrically connected to an inverter bridge power tube 11. The other end of the inverter bridge power tube 11 is rotatably connected to the internal rotor of a brushless motor 12. A water cooling mechanism 7 is arranged outside one end of the brushless motor 12, and the brushless motor 12 is The other end of the machine 12 is connected to one end of the rotating block 14 through the planetary reduction gear set 13. The outer wall of the rotating block 14 is rotatably connected to the inside of the bearing 15. The bearing 15 is embedded in the shell 3. The other end of the rotating block 14 is provided with a riveting mechanism 5. The riveting mechanism 5 is provided with a stroke detection mechanism 4. The other end of the riveting mechanism 5 is provided with a dustproof mechanism 8. A pressure detection mechanism 6 is provided on one side of the dustproof mechanism 8. The pressure detection mechanism 6 is used to detect the tension of the rivet. The dustproof mechanism 8 includes a shell 801 threadedly connected to one end of the front sleeve 501. A hole groove is opened at one end of the shell 801, and a connecting ring is welded inside the hole groove at one end of the shell 801. 802, one side of the connecting ring 802 is rotatably connected to the sealing block 803, one side of the sealing block 803 is welded to one end of the third spring 804, and the other end of the third spring 804 is sleeved on the outside of the positioning block 805, and the positioning block 805 is welded to the inner wall of the shell 801. There are four sealing blocks 803, and the four sealing blocks 803 are tightly fitted to each other through rotational cooperation. When not in use, the four sealing blocks 803 inside the shell 801 are pulled out by rivets, and the four sealing blocks 803 inside the shell 801 will rotate around the connection with the connecting ring 802 under the push of the third spring 804, so that the four sealing blocks 803 will close to each other. When 803 are closed, they will fit tightly against each other, so that the hole groove at one end of the shell 801 for inserting rivets will be closed, which is beneficial to prevent external dust particles from entering the inside of the rivet gun through the hole groove at one end of the shell 801. When in use, it is only necessary to insert the rivet into the hole groove at one end of the shell 801 for inserting rivets. When the rivet contacts the sealing block 803, the third spring 804 will be compressed, so that the sealing block 803 can be flipped outward, and the hole groove at one end of the shell 801 can be opened to allow the rivet to be inserted into the inside of the rivet mechanism 5, which is beneficial to enable the device to play a dust-proof effect without affecting the use.

[0035] One of the preferred embodiments of the present application is as follows: Figures 1 to 4As shown, the stroke detection mechanism 4 includes a first pressure sensor 404 that is in sliding contact with the inner wall of the screw rod 502, a first spring 403 is provided at one end of the first pressure sensor 404, the outer wall of the first spring 403 is in sliding contact with the inside of the screw rod 502, and the other end of the first spring 403 is embedded in the middle of the limit rod 402, the bottom end and the top end of the limit rod 402 are in sliding contact with the inner wall of the screw rod 502, the bottom and top of the screw rod 502 are provided with rectangular holes, the length of the rectangular holes at the bottom and top of the screw rod 502 is consistent with the maximum stroke length of the screw rod 502, the first pressure sensor 404 is electrically connected to the display 401, the display 401 is embedded in the top of the outer wall of the front sleeve 501, When in use, the rivet is inserted into the hole groove at the front end of the shell 801 until the rivet is inserted into the through hole inside the top block 504, and the brushless motor 12 drives the planetary reduction gear set 13 to rotate, and then the planetary reduction gear set 13 drives the rotating block 14 to rotate. While the rotating block 14 rotates, it can drive the screw rod 502 to move backward through the thread, and then the screw rod 502 can drive the riveting mechanism 5 to move backward. The riveting mechanism 5 drives the rivet to pull the tail of the rivet, and when the rivet is pulled into place, it will contact the first pressure sensor 404. After detecting the pressure signal, the first pressure sensor 404 will feed back the signal to the display 401 to detect whether the rivet is pulled into place.

[0036] One of the preferred embodiments of the present application is as follows: Figures 1 to 5 As shown, the pressure detection mechanism 6 includes a base 601 welded to one end of the shell 801, a support block 602 is arranged inside the base 601, and the bottom and top outer walls of the support block 602 are provided with protruding structures, and the outer wall protruding structures of the support block 602 are in sliding contact with the outer wall hole grooves of the base 601, and two second pressure sensors 604 are arranged between the support block 602 and the base 601, and the second pressure sensors 604 are electrically connected to the display 401. A fourth spring 603 is embedded inside the base 601, and a hole groove is opened in the middle of the support block 602 for inserting rivets. When the rivet is pulled by the riveting mechanism 5, the tail of the rivet will squeeze the support block 602, and then the support block 602 will squeeze the second pressure sensor 604 inside the base 601, and the tension on the rivet is detected by the second pressure sensor 604, and then the signal is fed back to the display 401, which is conducive to real-time display of the rivet tension and real-time detection of the force condition of the rivet.

[0037] One of the preferred embodiments of the present application is as follows: Figures 1 to 8As shown, the water cooling mechanism 7 includes a water tank 701 embedded in the handle 2, the water tank 701 is filled with cooling water, and the top of one end of the water tank 701 is connected to one end of a cooling pipe 703 through a micro water pump 702, the other end of the cooling pipe 703 is connected to the inside of the other end of the water tank, the outside of the cooling pipe 703 is distributed with fins 704 in an annular shape with equal spacing, the fins 704 are welded to the surface of the cooling pipe 703, the cooling pipe 703 and the fins 704 are made of copper-aluminum composite material, and the cooling pipe 703 is spirally distributed on the inner wall of the shell 801, and a plurality of semiconductor cooling sheets 705 are embedded in the water tank 701, and the semiconductor cooling sheets 705 are distributed in an equal spacing, and adjacent The semiconductor refrigeration plates 705 are distributed in an upward and downward offset manner with respect to each other, and the semiconductor refrigeration plates 705 are used to cool the cooling water inside the water tank 701. The cooled cooling water enters the cooling pipe 703 for circulation under the action of the micro water pump 702. The cooling water in the cooling pipe 703 can exchange heat with the spiral cooling pipe 703 and the fins 704, and then exchange heat with the heat inside the outer shell 3 through the fins 704, which is beneficial to achieve a cooling effect, and further helps to reduce the friction of mechanical parts and the heat generated during the operation of the motor, thereby avoiding accelerated wear of parts due to long-term overheating and extending the service life of the tool.

[0038] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A DC rivet gun, characterized in that: include: The device body (1), a stroke detection mechanism (4), a riveting mechanism (5), a pressure detection mechanism (6), a water cooling mechanism (7) and a dustproof mechanism (8), wherein a handle (2) is installed on the top of the device body (1), a trigger (10) is embedded on one side of the handle (2), and the trigger (10) is used to control a switch, a housing (3) is arranged on the top of the handle (2), a power cord (9) is arranged at one end inside the housing (3), the power cord (9) is connected to an external power source, and the other end of the power cord (9) is connected to an inverter The inverter bridge power tube (11) is electrically connected, the other end of the inverter bridge power tube (11) is rotatably connected to the internal rotor of the brushless motor (12), one end of the brushless motor (12) is provided with a water cooling mechanism (7) outside, and the other end of the brushless motor (12) is connected to one end of a rotating block (14) through a planetary reduction gear set (13), the outer wall of the rotating block (14) is rotatably connected to the inside of a bearing (15), the bearing (15) is embedded in the housing (3), and the other end of the rotating block (14) is provided with a riveting mechanism (5); A stroke detection mechanism (4) is provided inside the rivet pulling mechanism (5); a dustproof mechanism (8) is provided at the other end of the rivet pulling mechanism (5); a pressure detection mechanism (6) is provided on one side of the dustproof mechanism (8); the pressure detection mechanism (6) is used to detect the pulling force of the rivet; The dustproof mechanism (8) comprises a shell (801) threadedly connected to one end of the front sleeve (501), one end of the shell (801) is provided with a hole groove, and a connecting ring (802) is welded inside the hole groove at one end of the shell (801), one side of the connecting ring (802) is rotatably connected to a sealing block (803), one side of the sealing block (803) is welded to one end of a third spring (804), and the other end of the third spring (804) is sleeved on the outside of a positioning block (805), and the positioning block (805) is welded to the inner wall of the shell (801), and four sealing blocks (803) are provided, and the four sealing blocks (803) are tightly fitted to each other through rotational cooperation.

2. A DC rivet gun as claimed in claim 1, characterized in that: The riveting mechanism (5) comprises a front sleeve (501) threadedly connected to the housing (3); the interior of the front sleeve (501) is a hollow structure; the inner wall of the front sleeve (501) is in sliding contact with the outer wall of the screw rod (502); a second spring (503) is embedded in one end of the screw rod (502); a top block (504) is provided at one end of the second spring (503); a hole groove is provided in the top block (504); the other end of the screw rod (502) is threadedly connected to the inner wall of one end of the sliding sleeve (505); a clamping block (506) is provided in the sliding sleeve (505); one end of the clamping block (506) is tightly fitted with one end of the top block (504).

3. A DC rivet gun as claimed in claim 2, characterized in that: Three clamping blocks (506) are provided, and inner surfaces of the three clamping blocks (506) are provided with tooth groove structures. The outer wall of the clamping block (506) is in an inclined shape, and the outer wall of the clamping block (506) is in sliding contact with the inner wall of one end of the sliding sleeve (505). The contact surface between the sliding sleeve (505) and the clamping block (506) is in an inclined shape, and the inner wall of one end of the sliding sleeve (505) is in a contracted shape.

4. A DC rivet gun as claimed in claim 1, characterized in that: The stroke detection mechanism (4) comprises a first pressure sensor (404) in sliding contact with the inner wall of the screw rod (502); a first spring (403) is provided at one end of the first pressure sensor (404); an outer wall of the first spring (403) is in sliding contact with the inside of the screw rod (502); and the other end of the first spring (403) is embedded in the middle of the limit rod (402); a bottom end and a top end of the limit rod (402) are in sliding contact with the inner wall of the screw rod (502).

5. A DC rivet gun as claimed in claim 4, characterized in that: The bottom and top of the screw rod (502) are provided with rectangular holes, the length of which is consistent with the maximum stroke length of the screw rod (502), the first pressure sensor (404) is electrically connected to the display (401), and the display (401) is embedded in the top of the outer wall of the front sleeve (501).

6. A DC rivet gun as claimed in claim 1, characterized in that: The pressure detection mechanism (6) comprises a base (601) welded to one end of the shell (801), a support block (602) is arranged inside the base (601), the bottom and top outer walls of the support block (602) are provided with protruding structures, and the protruding structures on the outer wall of the support block (602) are in sliding contact with the holes and grooves on the outer wall of the base (601), and two second pressure sensors (604) are arranged between the support block (602) and the base (601), and the second pressure sensors (604) are electrically connected to the display (401), a fourth spring (603) is embedded inside the base (601), and a hole and groove are opened in the middle of the support block (602) for inserting rivets.

7. A DC rivet gun as claimed in claim 1, characterized in that: The water cooling mechanism (7) comprises a water tank (701) embedded in the handle (2), the water tank (701) is filled with cooling water, and the top of one end of the water tank (701) is connected to one end of a cooling pipe (703) via a micro water pump (702), the other end of the cooling pipe (703) is connected to the inside of the other end of the water tank, and the outside of the cooling pipe (703) is provided with fins (704) distributed in an annular shape at equal intervals, and the fins (704) are welded to the surface of the cooling pipe (703).

8. A DC rivet gun as claimed in claim 7, characterized in that: The cooling tube (703) and the fin (704) are made of a copper-aluminum composite material, and the cooling tube (703) is distributed in a spiral shape on the inner wall of the shell (801). A plurality of semiconductor cooling plates (705) are embedded in the water tank (701), and the semiconductor cooling plates (705) are distributed in an equidistant manner, and adjacent semiconductor cooling plates (705) are distributed in an up-and-down staggered manner.

9. A DC rivet gun as claimed in claim 2, characterized in that: An oil groove (17) is provided on the inner wall of the front sleeve (501). The oil groove (17) is in a ring-shaped structure, and a first sealing ring (18) and a second sealing ring (19) are provided on both sides of the oil groove (17). The inner sides of the first sealing ring (18) and the second sealing ring (19) are tightly fitted with the outer wall of the screw rod (502). The first sealing ring (18) and the second sealing ring (19) are embedded in the inner wall of the housing (801), and the top of the oil groove (17) is threadedly connected to the sealing plug (16).

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