A temperature-reducing electric wrench that is convenient for heat dissipation

Abstract

The present invention discloses a coolable electric wrench that is convenient for heat dissipation. The present invention relates to the technical field of electric wrenches, and comprises a shell, wherein the shell is fixedly connected to the top of a handle, a ventilation hole is provided on the outer side of the shell, a partition is fixedly connected to the inner wall of the shell, a fixed plate is fixedly connected to the opposite side of the partition, a heat sink is fixedly connected to the outer side of the fixed plate, a contact plate is slidably connected to the side of the heat sink close to the motor, a bent plate is fixedly connected to the middle of the fixed plate, and a diverter plate is fixedly connected to the opposite side of the partition. The coolable electric wrench that is convenient for heat dissipation forms a closed cavity through two partitions, a bent plate and a fixed plate, a coolant is provided inside the cavity, and a diverter plate provided in the middle of the bent plate is used to make the coolant inside the cavity flow on the inner wall of the bent plate, thereby exchanging heat with the motor and increasing the heat dissipation area of ​​the coolant and the motor.

Description

Technical Field

[0001] The invention relates to the technical field of electric wrenches, in particular to a temperature-reducing electric wrench which is convenient for heat dissipation. Background Art

[0002] In the field of industrial production and machinery manufacturing, traditional manual wrenches are inefficient and labor-intensive when faced with a large number of high-intensity tightening and disassembly tasks. In order to improve production efficiency and reduce the labor burden of workers, electric tools came into being. Electric wrenches are one of many electric tools. They are usually used to loosen or tighten nuts and bolts after a sleeve is installed at the output shaft end. The emergence of electric wrenches has replaced traditional manual wrenches in many working conditions, greatly improving work efficiency.

[0003] After the electric wrench has been working continuously for a long time, the motor and internal components of the electric wrench will continue to run and generate a lot of heat, which affects the stability of the work. Therefore, the existing electric wrenches, especially the electric fixed torque wrenches used for tightening and loosening railway rail bolts and nuts, have large current, large torque, and high heat generation. Therefore, they need to be stopped for heat dissipation after being used for a period of time and cannot work continuously for a long time. Summary of the invention

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a coolable electric wrench that is convenient for heat dissipation, comprising a handle, the top of the handle is fixedly connected to a shell, the outer side of the shell is fixedly connected to a fixed shell, the inner wall of the shell is fixedly connected to a motor, the motor passes through the shell, and the inner wall of the fixed shell is fixedly connected to a gear ring;

[0005] An actuator, the actuator is fixedly mounted on an end of the fixed shell away from the housing;

[0006] An impact member, wherein the impact member is fixedly mounted inside the fixed shell and is fixedly connected to the actuator;

[0007] A buffer assembly, wherein the buffer assembly is located inside the fixed shell, and the motor is fixedly connected to the impact member via the buffer assembly;

[0008] In which, the shell includes an outer shell, which is fixedly connected to the top of the handle, and a ventilation hole is opened on the outer side of the outer shell. The ventilation holes are symmetrically arranged on the upper and lower parts of the outer shell, thereby accelerating the flow of air inside the outer shell, which is convenient for the heat dissipation of the motor. The ventilation holes are located at one end away from the fixed shell, and the ventilation holes are symmetrically arranged with the motor as the center. A partition is fixedly connected to the inner wall of the outer shell, and a closed cavity is formed by two partitions, a bent plate and a fixed plate. A coolant is arranged inside the cavity, and a diverter plate arranged in the middle of the bent plate is used to make the coolant inside the cavity flow on the inner wall of the bent plate, thereby exchanging heat with the motor. By arranging multiple bent plates, the heat dissipation area of ​​the coolant and the motor is increased, so that the coolant circulates to take away the heat and will generate heat from the motor The heat is introduced into the water in the cavity, and the heat sink runs through the fixed plate, so that the water will not directly contact the internal components of the motor, thereby effectively avoiding the problem of rust. At the same time, the contact plate with a spring can always maintain contact with the motor after the motor vibrates when in use, thereby maintaining the heat conduction effect. There are two partitions, and the opposite sides of the partition are fixedly connected with a fixed plate, the outer side of the fixed plate is fixedly connected with a heat sink, the side of the heat sink close to the motor is slidably connected with a contact plate, the contact plate contacts the outer side of the motor, the middle of the fixed plate is fixedly connected with a bent plate, the fixed plate and the bent plate are alternately arranged, the opposite side of the partition is fixedly connected with a diverter plate, and the diverter plate is located in the middle of the bent plate.

[0009] Preferably, the buffer assembly includes a connecting seat, which is fixedly connected to the impact piece, and a connecting plate is provided at one end of the connecting seat away from the impact piece, and the connecting plate is fixedly connected to the output end of the motor, and a protrusion is fixedly connected to one end of the connecting seat close to the connecting plate. By providing the connecting seat and the connecting plate, the output end of the motor and the rotating rod are fixedly connected, and the motor is connected to an external power supply. The motor drives the rotating rod to rotate through the buffer assembly, and the rotating rod drives the impact block to collide with the positioning rod, and the axial vibration of the rotating rod is transmitted to the connecting seat. At this time, the vibration on the connecting seat is transmitted to the connecting plate through the cylinder through the buffer pad, and then transmitted to the output end of the motor. The axial vibration of the rotating rod is buffered by the elastic connection between the motor and the impact piece through the buffer assembly, thereby reducing the axial vibration of the output shaft of the motor, thereby reducing the vibration on the shell, and thus improving According to the user's experience, a cylinder is fixedly connected to one end of the connecting seat near the connecting plate, the protrusion and the cylinder are alternately arranged, a groove is provided at the right end of the connecting plate near the protrusion, the connecting plate and the connecting seat are clamped and adapted through the protrusion and the groove, a circular hole is provided at one end of the connecting plate cylinder, a buffer pad is fixedly connected inside the circular hole, the contact surface between the cylinder and the buffer pad is inclined, and the cylinder is located inside the buffer pad, and the contact area between the cylinder and the buffer pad is increased by the semi-wrapped design of the cylinder and the buffer pad. The larger contact area can distribute the impact force more evenly on the buffer pad and reduce the pressure per unit area, which helps to reduce local stress concentration and reduce the risk of damage to the buffer pad and the cylinder, while reducing local excessive deformation or unstable buffering behavior caused by too small contact area, thereby improving the reliability and stability of shock absorption.

[0010] Preferably, the actuator comprises a connecting rod, one end of the connecting rod close to the impact piece is fixedly connected to a positioning rod, and the other end of the connecting rod away from the positioning rod is slidably connected to a clamping column, the outer side of the clamping column is fixedly connected to a return spring, the outer side of the connecting rod is fixedly connected to a convex strip, and the end of the connecting rod away from the positioning rod is provided with a sleeve. After the sleeve is put on and works for a long time, the connection between the electric wrench and the sleeve will wear out. After the wear occurs, the connection of the electric wrench will shake when working in the sleeve, which will accelerate the wear of the connection of the electric wrench in the sleeve, and then the electric wrench will be eccentric when working. By arranging a sliding adaptation between the convex strip and the clamping groove, slipping between the connecting rod and the sleeve is avoided, the offset between the sleeve and the connecting rod is reduced, and there is no gap between the sleeve and the connecting rod, thereby solving the problem of the electric wrench The eccentricity between the hand and the socket when working causes the problem of wear at the connection between the socket and the electric wrench, which effectively prolongs the service life of the socket and the electric wrench. The clamping column is located inside the connecting rod, and the clamping column runs through the connecting rod. There are two clamping columns, and the two clamping columns are symmetrically arranged with the reset spring as the center. The convex strips and the clamping columns are alternately arranged on the outside of the connecting rod. The sleeve is provided with a clamping groove near the inner wall of the connecting rod, and the convex strip is located inside the clamping groove. A cavity is provided at one end of the sleeve away from the connecting rod, and a through groove is provided inside the sleeve near the clamping column. The elasticity of the reset spring is utilized to cover the sleeve on the connecting rod. By arranging the clamping fit between the through groove and the clamping column, the sleeve is not easily separated from the connecting rod during operation. At the same time, bolt sleeves of different specifications can be assembled according to the different specifications of the bolts, thereby improving the applicability of the equipment.

[0011] Preferably, the impact member includes an impact block, and a positioning groove is provided at one end of the impact block close to the positioning rod, the positioning rod is located inside the positioning groove, and a through hole is provided at one end of the impact block away from the positioning groove. The inner wall of the through hole is fixedly connected with a compression spring, and the middle part of the impact block is rotatably connected with a rotating rod. When the end face of the nut contacts the inner wall of the cavity of the sleeve, the motor is connected to an external power supply, and the motor drives the rotating rod to rotate through the buffer assembly, and the rotating rod drives the impact block to rotate, thereby driving the positioning rod located inside the positioning groove to rotate, and then driving the sleeve to rotate, and the resistance torque rises sharply. The rotating spiral groove causes the ball bearing to move backward with the impact block to overcome the friction force and the pressure of the compression spring, so that the impact block is disengaged from the mutual meshing with the positioning rod. At this time, the positioning rod does not move, and the impact block continues to move backward. After rotating the positioning rod, due to the action of the compression spring, the impact block moves forward instantaneously, and generates an angular acceleration along the spiral groove, and the impact block hits the positioning rod, resulting in a collision. Then the spiral groove causes the ball bearing and the impact block to move backward and disengage. In this way, collisions are generated again and again in a cycle, thereby obtaining the required impact torque to tighten the nut. For example, the nut can be screwed out by turning the power switch to the reverse position. A spiral groove is provided on the outer side of the rotating rod, and the impact block is rotatably connected to a ball near the inner wall of the rotating rod, and the ball is located inside the spiral groove. The end of the rotating rod away from the impact block is fixedly connected to the connecting seat, and a gear is fixedly connected to the outer side of the rotating rod. The gear is close to the side of the connecting seat, and the outer side of the gear is meshed with the inner side of the gear ring. The end of the compression spring away from the through hole is fixedly connected to the gear.

[0012] The present invention provides a temperature-reducing electric wrench that is convenient for heat dissipation and has the following beneficial effects:

[0013] 1. The coolable electric wrench which is easy to dissipate heat has a diverter plate arranged in the middle of the bent plate, so that the coolant in the cavity flows on the inner wall of the bent plate, thereby exchanging heat with the motor. By arranging multiple bent plates, the heat dissipation area of ​​the coolant and the motor is increased, so that the coolant circulates to take away the heat and introduces the heat generated by the motor into the water in the cavity, and the heat sink passes through the fixed plate, so that the water will not directly contact the internal components of the motor, thereby effectively avoiding the problem of rust.

[0014] Second, the coolable electric wrench that is easy to dissipate heat has an elastic connection between the motor and the impact piece through a buffer component, so that the axial vibration on the rotating rod can be buffered, the axial vibration on the output shaft of the motor is reduced, thereby reducing the vibration on the shell, and further improving the user experience.

[0015] 3. The coolable electric wrench which is easy to dissipate heat increases the contact area between the cylinder and the buffer pad through the semi-wrapped design of the cylinder and the buffer pad. The larger contact area can distribute the impact force more evenly on the buffer pad, reducing the pressure per unit area.

[0016] Fourth, the coolable electric wrench that is easy to dissipate heat avoids slipping between the connecting rod and the sleeve through the sliding adaptation between the convex strip and the groove, reduces the offset between the sleeve and the connecting rod, and there is no gap between the sleeve and the connecting rod, which solves the problem of wear at the connection between the socket and the electric wrench caused by eccentricity when the electric wrench and the socket are working, and effectively extends the service life of the socket and the electric wrench. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the external structure of a temperature-reducing electric wrench that is convenient for heat dissipation according to the present invention;

[0018] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0019] Figure 3 It is a schematic diagram of the local structure of the present invention;

[0020] Figure 4 It is a schematic diagram of the cross-sectional structure of the shell of the present invention;

[0021] Figure 5 It is a schematic diagram of the structure of a partial cross-sectional view of the housing of the present invention;

[0022] Figure 6 This is a schematic diagram of the structure of the buffer assembly of the present invention;

[0023] Figure 7 It is a partial structural schematic diagram of the buffer assembly of the present invention;

[0024] Figure 8 It is a schematic diagram of the second local structure of the buffer assembly of the present invention;

[0025] Fig. 9 It is a schematic diagram of the cross-sectional structure of the actuator of the present invention;

[0026] Fig.10 It is a schematic diagram of the partial structure of the actuator of the present invention;

[0027] Fig.11 It is a schematic diagram of the structure of the impact piece of the present invention;

[0028] Fig.12 It is a schematic diagram of the cross-sectional structure of the impact piece of the present invention.

[0029] In the figure: 1. handle; 2. shell; 21. outer shell; 22. ventilation hole; 23. partition; 24. heat sink; 25. contact plate; 26. fixed plate; 27. bent plate; 28. diverter plate; 3. fixed shell; 4. actuator; 41. connecting rod; 42. positioning rod; 43. convex strip; 44. sleeve; 45. cavity; 46. clamping column; 47. reset spring; 48. through groove; 5. impact member; 51. impact block; 52. positioning groove; 53. through hole; 54. compression spring; 55. rotating rod; 56. gear; 57. ball; 58. spiral groove; 6. gear ring; 7. buffer assembly; 71. connecting seat; 72. connecting plate; 73. round hole; 74. buffer pad; 75. groove; 76. convex block; 77. cylinder; 8. motor. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0031] The first embodiment, as Figures 1 to 5 As shown, the present invention provides a technical solution: a temperature-reducing electric wrench that is convenient for heat dissipation, comprising a handle 1, a shell 2 is fixedly connected to the top of the handle 1, a fixed shell 3 is fixedly connected to the outer side of the shell 2, a motor 8 is fixedly connected to the inner wall of the shell 2, the motor 8 passes through the shell 2, and a gear ring 6 is fixedly connected to the inner wall of the fixed shell 3;

[0032] An actuator 4, the actuator 4 is fixedly mounted on one end of the fixed shell 3 away from the housing 2;

[0033] An impact member 5, the impact member 5 is fixedly mounted inside the fixed shell 3, and the impact member 5 is fixedly connected to the actuator 4;

[0034] The buffer assembly 7 is located inside the fixed shell 3, and the motor 8 is fixedly connected to the impact member 5 through the buffer assembly 7;

[0035] Among them, the shell 2 includes an outer shell 21, which is fixedly connected to the top of the handle 1. A ventilation hole 22 is opened on the outer side of the outer shell 21. The ventilation holes 22 are symmetrically arranged on the upper and lower parts of the outer shell 21, thereby accelerating the flow of air inside the outer shell 21, which is convenient for the heat dissipation of the motor 8. The ventilation holes 22 are located at the end away from the fixed shell 3, and the ventilation holes 22 are symmetrically arranged with the motor 8 as the center. A partition 23 is fixedly connected to the inner wall of the outer shell 21. A closed cavity is formed by two partitions 23, a bent plate 27 and a fixed plate 26. A coolant is arranged inside the cavity. A diverter plate 28 arranged in the middle of the bent plate 27 is used to make the coolant inside the cavity flow on the inner wall of the bent plate 27, thereby exchanging heat with the motor 8. By arranging multiple bent plates 27, the heat dissipation area of ​​the coolant and the motor 8 is increased, so that the coolant circulates to take away the heat and will heat the motor 8. The heat generated by the machine 8 is introduced into the water in the cavity, and the heat sink 24 passes through the fixed plate 26, so that the water will not directly contact the internal components of the motor, thereby effectively avoiding the problem of rust. At the same time, the contact plate 25 with a spring can still maintain contact with the motor 8 after the motor 8 vibrates during use, thereby maintaining the heat conduction effect. There are two partitions 23. The opposite side of the partition 23 is fixedly connected with a fixed plate 26, the outer side of the fixed plate 26 is fixedly connected with a heat sink 24, the side of the heat sink 24 close to the motor 8 is slidably connected with a contact plate 25, and the contact plate 25 contacts the outer side of the motor 8. The middle of the fixed plate 26 is fixedly connected with a bent plate 27, and the fixed plate 26 and the bent plate 27 are alternately arranged. The opposite side of the partition 23 is fixedly connected with a diverter plate 28, and the diverter plate 28 is located in the middle of the bent plate 27.

[0036] The second embodiment is based on the first embodiment. Figures 6 to 8As shown, the buffer assembly 7 includes a connecting seat 71, which is fixedly connected to the impact piece 5, and a connecting plate 72 is provided at one end of the connecting seat 71 away from the impact piece 5, and the connecting plate 72 is fixedly connected to the output end of the motor 8. A protrusion 76 is fixedly connected to the end of the connecting seat 71 close to the connecting plate 72. By providing the connecting seat 71 and the connecting plate 72, the output end of the motor 8 and the rotating rod 55 are fixedly connected. When the motor 8 is connected to an external power supply, the motor 8 drives the rotating rod 55 to rotate through the buffer assembly 7, and the rotating rod 55 drives the impact block 51 to collide with the positioning rod 42, and the axial vibration of the rotating rod 55 is transmitted to the connecting seat 71. At this time, the vibration on the connecting seat 71 is transmitted to the connecting plate 72 through the cylinder 77 through the buffer pad 74, and then transmitted to the output end of the motor 8. The axial vibration of the rotating rod 55 is buffered by the elastic connection between the motor 8 and the impact piece 5 through the buffer assembly 7, thereby reducing the axial vibration of the output shaft of the motor 8, thereby reducing the vibration on the housing 2, and thus improving The user experience is improved. A cylinder 77 is fixedly connected to one end of the connecting seat 71 near the connecting plate 72. The protrusion 76 and the cylinder 77 are alternately arranged. A groove 75 is provided at the right end of the connecting plate 72 near the protrusion 76. The connecting plate 72 and the connecting seat 71 are snap-fitted and adapted through the protrusion 76 and the groove 75. A circular hole 73 is provided at one end of the cylinder 77 of the connecting plate 72. A buffer pad 74 is fixedly connected to the inside of the circular hole 73. The contact surface between the cylinder 77 and the buffer pad 74 is inclined, and the cylinder 77 is located inside the buffer pad 74. The contact area between the cylinder 77 and the buffer pad 74 is increased by the semi-wrapped design of the cylinder 77 and the buffer pad 74. The larger contact area can distribute the impact force more evenly on the buffer pad 74, reducing the pressure per unit area. This helps to reduce local stress concentration and reduce the risk of damage to the buffer pad 74 and the cylinder 77. At the same time, it reduces local excessive deformation or unstable buffering behavior caused by too small a contact area, thereby improving the reliability and stability of shock absorption.

[0037] The third embodiment is based on the first and second embodiments. Figures 9 and 10As shown, the actuator 4 includes a connecting rod 41, one end of the connecting rod 41 close to the impact member 5 is fixedly connected to the positioning rod 42, and the end of the connecting rod 41 away from the positioning rod 42 is slidably connected to a clamping column 46, the outer side of the clamping column 46 is fixedly connected to a return spring 47, and the outer side of the connecting rod 41 is fixedly connected to a convex strip 43, and the end of the connecting rod 41 away from the positioning rod 42 is provided with a sleeve 44. After the sleeve 44 is put on and works for a long time, the connection between the electric wrench and the sleeve 44 will wear out. After the wear occurs, the connection of the electric wrench will shake when working in the sleeve 44, which will accelerate the wear of the connection of the electric wrench in the sleeve 44, and then the electric wrench will be eccentric when working. By providing a sliding fit between the convex strip 43 and the clamping groove, slippage between the connecting rod 41 and the sleeve 44 is avoided, the offset between the sleeve 44 and the connecting rod 41 is reduced, and there will be no gap between the sleeve 44 and the connecting rod 41, thereby solving the problem of the electric wrench and The eccentricity of the sleeve 44 during operation causes the problem of wear at the connection between the sleeve 44 and the electric wrench, which effectively prolongs the service life of the sleeve 44 and the electric wrench. The clamping column 46 is located inside the connecting rod 41, and the clamping column 46 runs through the connecting rod 41. There are two clamping columns 46, and the two clamping columns 46 are symmetrically arranged with the reset spring 47 as the center. The convex strips 43 and the clamping columns 46 are alternately arranged on the outside of the connecting rod 41. The sleeve 44 is provided with a clamping groove near the inner wall of the connecting rod 41, and the convex strips 43 are located inside the clamping groove. A cavity 45 is provided at one end of the sleeve 44 away from the connecting rod 41, and a through groove 48 is provided inside the sleeve 44 near the clamping column 46. The elastic performance of the reset spring 47 is utilized to sleeve the sleeve 44 on the connecting rod 41. By setting the clamping fit between the through groove 48 and the clamping column 46, the sleeve 44 is not easy to separate from the connecting rod 41 during operation. At the same time, bolt sleeves of different specifications can be assembled according to the different specifications of the bolts to improve the applicability of the equipment.

[0038] For the fourth embodiment, please refer to Figure 11 to Figure 12As shown, the impact member 5 includes an impact block 51, and a positioning groove 52 is provided at one end of the impact block 51 close to the positioning rod 42, and the positioning rod 42 is located inside the positioning groove 52. A through hole 53 is provided at one end of the impact block 51 away from the positioning groove 52, and a compression spring 54 is fixedly connected to the inner wall of the through hole 53. A rotating rod 55 is rotatably connected to the middle of the impact block 51. When the end face of the nut contacts the inner wall of the cavity 45 of the sleeve 44, the motor 8 is connected to an external power supply to work, and the motor 8 drives the rotating rod 55 to rotate through the buffer assembly 7, and the rotating rod 55 drives the impact block 51 to rotate, thereby driving the positioning rod 42 located inside the positioning groove 52 to rotate, and then driving the sleeve 44 to rotate, the resistance torque rises sharply, and the rotating spiral groove 58 causes the ball bearing to move backward with the impact block to overcome the friction and the pressure of the compression spring 54, so that the impact block 51 is disengaged from the mutual meshing between the positioning rod 42. At this time, the positioning rod 42 does not move, and the impact block 51 continues to move backward. After the positioning rod 42 is rotated, due to the action of the compression spring 54, the impact block 51 moves forward instantaneously and generates an angular acceleration along the spiral groove 58, and the impact block 51 hits the positioning rod 42, resulting in a collision. Then the spiral groove 58 causes the ball and the impact block 51 to move backward and disengage. In this way, collisions are generated again and again, thereby obtaining the required impact torque to tighten the nut. For example, the nut can be screwed out by turning the power switch to the reverse position. The outer side of the rotating rod 55 is provided with a spiral groove 58, and the impact block 51 is rotatably connected to the inner wall of the rotating rod 55 near the rotating rod 55. The ball 57 is located inside the spiral groove 58. The end of the rotating rod 55 away from the impact block 51 is fixedly connected to the connecting seat 71. The outer side of the rotating rod 55 is fixedly connected to the gear 56. The gear 56 is close to the side of the connecting seat 71. The outer side of the gear 56 is meshed with the inner side of the gear ring 6. The end of the compression spring 54 away from the through hole 53 is fixedly connected to the gear 56.

[0039] When in use, the sleeve 44 is sleeved on the connecting rod 41 by utilizing the elasticity of the return spring 47 , and the sleeve 44 is not easily separated from the connecting rod 41 during operation by providing a snap fit between the through slot 48 and the clamping column 46 .

[0040] When the end face of the nut contacts the inner wall of the cavity 45 of the sleeve 44, the motor 8 is connected to an external power source and the motor 8 drives the rotating rod 55 to rotate through the buffer assembly 7. The rotating rod 55 drives the impact block 51 to rotate, thereby driving the positioning rod 42 located inside the positioning groove 52 to rotate, and then driving the sleeve 44 to rotate. The resistance torque rises sharply, and the rotating spiral groove 58 causes the ball to move backward with the impact block to overcome the friction and the pressure of the compression spring 54, so that the impact block 51 is disengaged from the mutual meshing between the positioning rod 42. At this time, the positioning rod 42 does not move, and the impact block 51 continues to move backward. After rotating past the positioning rod 42, due to the action of the compression spring 54, the impact block 51 moves forward instantaneously and generates an angular acceleration along the spiral groove 58. The impact block 51 hits the positioning rod 42 and causes a collision. Then the spiral groove 58 causes the ball and the impact block 51 to move backward and disengage. This cycle generates collisions again and again, thereby obtaining the required impact torque to tighten the nut. If the power switch is turned to the reverse position, the nut can be screwed out.

[0041] At the same time, a closed cavity is formed by two partitions 23, a bent plate 27 and a fixed plate 26. A coolant is provided inside the cavity. A diverter plate 28 arranged in the middle of the bent plate 27 is used to make the coolant inside the cavity flow on the inner wall of the bent plate 27, thereby exchanging heat with the motor 8. By setting a plurality of bent plates 27, the heat dissipation area of ​​the coolant and the motor 8 is increased, so that the coolant circulation takes away the heat and introduces the heat generated by the motor 8 into the water in the cavity. The heat sink 24 passes through the fixed plate 26, so that the water does not directly contact the internal components of the motor, thereby effectively avoiding the problem of rust. At the same time, the contact plate 25 with a spring can always maintain contact with the motor 8 after the motor 8 vibrates during use, thereby maintaining the heat conduction effect.

[0042] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A temperature-reducing electric wrench that is convenient for heat dissipation, characterized in that: include: A handle (1), the top of the handle (1) being fixedly connected to a housing (2), the outer side of the housing (2) being fixedly connected to a fixed housing (3), the inner wall of the housing (2) being fixedly connected to a motor (8), the motor (8) passing through the housing (2), and the inner wall of the fixed housing (3) being fixedly connected to a gear ring (6); An actuator (4), the actuator (4) being fixedly mounted on an end of the fixed shell (3) away from the housing (2); An impact member (5), the impact member (5) being fixedly mounted inside the fixed shell (3), and the impact member (5) being fixedly connected to the actuator (4); A buffer assembly (7), the buffer assembly (7) being located inside the fixed shell (3), and the motor (8) being fixedly connected to the impact member (5) via the buffer assembly (7); The housing (2) comprises an outer shell (21), the outer shell (21) is fixedly connected to the top of the handle (1), a ventilation hole (22) is provided on the outer side of the outer shell (21), the ventilation hole (22) is located at an end away from the fixed shell (3), and the ventilation holes (22) are symmetrically arranged with the motor (8) as the center, and a partition (23) is fixedly connected to the inner wall of the outer shell (21), the number of the partitions (23) is two, and the opposite side of the partition (23) is fixedly connected to a fixed plate (26) ), a heat sink (24) is fixedly connected to the outer side of the fixed plate (26), a contact plate (25) is slidably connected to the side of the heat sink (24) close to the motor (8), the contact plate (25) is in contact with the outer side of the motor (8), a bent plate (27) is fixedly connected to the middle of the fixed plate (26), the fixed plate (26) and the bent plate (27) are alternately arranged, and a diverter plate (28) is fixedly connected to the opposite side of the partition (23), and the diverter plate (28) is located in the middle of the bent plate (27); The buffer assembly (7) comprises a connecting seat (71), the connecting seat (71) being fixedly connected to the impact member (5), a connecting plate (72) being provided at one end of the connecting seat (71) away from the impact member (5), and the connecting plate (72) being fixedly connected to an output end of the motor (8); A protrusion (76) is fixedly connected to one end of the connection seat (71) close to the connection plate (72), a cylinder (77) is fixedly connected to one end of the connection seat (71) close to the connection plate (72), the protrusions (76) and the cylinders (77) are arranged alternately, and a groove (75) is provided at the right end of the connection plate (72) close to the protrusion (76); The connecting plate (72) and the connecting seat (71) are snap-fitted and matched via a protrusion (76) and a groove (75); a circular hole (73) is provided at one end of the cylinder (77) of the connecting plate (72); a buffer pad (74) is fixedly connected to the inside of the circular hole (73); The actuator (4) comprises a connecting rod (41), one end of the connecting rod (41) close to the impact member (5) is fixedly connected to a positioning rod (42), one end of the connecting rod (41) away from the positioning rod (42) is slidably connected to a clamping column (46), the outer side of the clamping column (46) is fixedly connected to a return spring (47), the outer side of the connecting rod (41) is fixedly connected to a convex strip (43), and the end of the connecting rod (41) away from the positioning rod (42) is provided with a sleeve (44); The clamping column (46) is located inside the connecting rod (41), and the clamping column (46) passes through the connecting rod (41). There are two clamping columns (46), and the two clamping columns (46) are symmetrically arranged with the return spring (47) as the center. The convex strips (43) and the clamping columns (46) are alternately arranged on the outside of the connecting rod (41); The sleeve (44) has a slot on its inner wall near the connecting rod (41), the convex strip (43) is located inside the slot, the sleeve (44) has a cavity (45) on one end away from the connecting rod (41), and the sleeve (44) has a through slot (48) inside near the clamping column (46); The impact member (5) comprises an impact block (51), a positioning groove (52) is formed at one end of the impact block (51) close to the positioning rod (42), a through hole (53) is formed at one end of the impact block (51) away from the positioning groove (52), a compression spring (54) is fixedly connected to the inner wall of the through hole (53), a rotating rod (55) is rotatably connected to the middle part of the impact block (51), a spiral groove (58) is formed on the outer side of the rotating rod (55), and a ball (57) is rotatably connected to the inner wall of the impact block (51) close to the rotating rod (55); A gear (56) is fixedly connected to the outer side of the rotating rod (55); the gear (56) is close to a side of the connecting seat (71); the outer side of the gear (56) is meshed with the inner side of the gear ring (6); and one end of the compression spring (54) away from the through hole (53) is fixedly connected to the gear (56); The positioning rod (42) is located inside the positioning groove (52), the ball (57) is located inside the spiral groove (58), and one end of the rotating rod (55) away from the impact block (51) is fixedly connected to the connecting seat (71).

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