Electric elbow tool with multi-bearing structure

Abstract

The utility model discloses an electric elbow tool with a multi-bearing structure, and relates to the technical field of hardware equipment, the electric elbow tool with the multi-bearing structure comprises an elbow assembly, the elbow assembly comprises an elbow shell, an elbow rotating shaft and an output shaft are arranged in the elbow shell, and the elbow rotating shaft and the output shaft are arranged at a preset angle and rotate synchronously. A plurality of elbow bearings are arranged in the elbow shell, the speed reduction component comprises a sleeve, a connecting sleeve and a fixing support which are sequentially arranged from left to right and connected, a transmission shaft is arranged in the connecting sleeve and the fixing support, and a plurality of speed reduction bearings for supporting the transmission shaft are arranged in the connecting sleeve and the fixing support. The motor used for driving the transmission shaft is arranged in the handle shell, the radial fixing effect on the multiple connecting shafts is achieved under the effect of the multiple bearings, the coaxiality of the main shaft is stabilized, the unified and stable axis assembling relation is guaranteed, vibration during high-frequency work is avoided, and the precision and stability of acting transmission and conveying are improved.

Description

Technical Field

[0001] This utility model relates to the field of hardware equipment technology, and more specifically, to an electric elbow tool with a multi-bearing structure. Background Technology

[0002] Traditional electric bending tools use a split design, with one part being the stator and the other the rotor. During installation, the stator and rotor bearings must be fixed, and during disassembly, the stator and rotor must also be separated. This method results in low installation accuracy and the risk of scratching the stator and handle housing. Low installation accuracy leads to poor stability during use, thus severely reducing the tool's output accuracy and service life.

[0003] Meanwhile, due to the complex internal structure of electric bending tools, which includes multiple mechanisms such as reducer structure, clutch striking structure and gear mechanism, it is necessary to ensure overall stability and output accuracy. Therefore, a new bearing structure is needed to avoid the "offset jitter" phenomenon caused by high-speed rotation and high-frequency vibration.

[0004] In summary, how to provide a bending tool with high overall stability and high output accuracy during use is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide an electric bending tool with a multi-bearing structure, which improves the overall stability and output accuracy during operation by using multiple bearings.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An electric bending tool with a multi-bearing structure, comprising:

[0008] An elbow assembly, comprising an elbow housing, an elbow rotating shaft and an output shaft inside the elbow housing, the elbow rotating shaft and the output shaft being arranged at a preset angle and rotating synchronously, and a plurality of elbow bearings inside the elbow housing;

[0009] The deceleration component includes a sleeve, a connecting sleeve, and a fixed bracket arranged and connected sequentially from left to right. The connecting sleeve and the fixed bracket are provided with a drive shaft and a plurality of deceleration bearings supporting the drive shaft.

[0010] A handle assembly, comprising a handle housing and a fixing bracket, the fixing bracket being connected to the handle housing, and a motor for driving the drive shaft being disposed within the handle housing.

[0011] Furthermore, in this invention, the output shaft is installed at the output end of the elbow housing, and the output shaft is connected to the elbow shaft via a bevel gear transmission. An auxiliary shaft is fixedly installed on the side of the output shaft away from the output end and is coaxially mounted. The output end of the elbow housing is equipped with a first elbow bearing for fixing the output shaft and a second elbow bearing for fixing the auxiliary shaft.

[0012] Furthermore, the elbow assembly further includes:

[0013] The third elbow bearing is coaxially arranged with the elbow shaft and is used to fix the elbow shaft. The third elbow bearing is fixed inside the elbow housing.

[0014] Furthermore, the deceleration component further includes:

[0015] A bushing, the bushing being located at one end of the connecting sleeve near the elbow assembly and being located inside the connecting sleeve;

[0016] A first reduction bearing is located between the bushing and the elbow housing, and is used to radially fix the elbow shaft;

[0017] The bushing and the elbow housing are connected in an alternating sawtooth pattern at their contact points.

[0018] Furthermore, the deceleration component further includes:

[0019] A drive shaft, located inside the connecting sleeve;

[0020] A gear bracket is fitted over the outside of the drive shaft and installed inside the connecting sleeve. The gear bracket is located on the side of the bushing away from the elbow assembly.

[0021] The second reduction bearing is installed inside the bushing and is used to radially fix the gear bracket.

[0022] Furthermore, the handle assembly further includes:

[0023] The striking shaft has one end located in the handle housing and the other end located in the fixed bracket, and is connected to the drive shaft for transmission.

[0024] The striking shaft is connected to the transmission shaft by a plug-in connection, and the fixed bracket is detachably connected to the handle housing.

[0025] Furthermore, the deceleration component further includes:

[0026] The fifth reduction bearing is installed in the fixed bracket and located at the overlapping position of the impact shaft and the transmission shaft, and is used to radially fix the impact shaft.

[0027] Furthermore, the deceleration component further includes:

[0028] A fourth reduction bearing is located between the fifth reduction bearing and the second reduction bearing and is used to radially fix the drive shaft. The fourth reduction bearing is mounted on the fixed bracket.

[0029] Furthermore, in this invention, the sleeve is connected to the elbow housing by a snap-fit ​​connection, and the connecting sleeve is connected to the sleeve by a thread.

[0030] Furthermore, the present invention provides an upper motor housing and a lower motor housing for fixing the motor, and the upper motor housing and the lower motor housing are fixed together by bolts.

[0031] Furthermore, the handle housing is provided with an adjustment hole, and a switch is provided at the adjustment hole for opening and closing the adjustment hole.

[0032] Furthermore, the switch component includes a sealing part and a fixing part, which are arranged at a preset angle. When the sealing part is placed at the adjustment hole, the adjustment hole is closed.

[0033] Furthermore, the sealing part and the fixing part are made of plastic and are integrally molded.

[0034] Furthermore, the handle housing is provided with a slide rail, and the fixing part slides on the slide rail.

[0035] The electric elbow tool with a multi-bearing structure provided by this utility model first installs the connecting shafts of the elbow assembly, the reduction gear, and the handle assembly into their corresponding positions. The elbow assembly includes an elbow housing, inside which are an elbow rotating shaft and an output shaft. The elbow rotating shaft and the output shaft are arranged at a preset angle and rotate synchronously. The elbow housing contains several elbow bearings. The reduction gear includes a sleeve, a connecting sleeve, and a fixed bracket arranged sequentially from left to right and connected to each other. The connecting sleeve and the fixed bracket contain a transmission shaft and several reduction bearings supporting the transmission shaft. The handle assembly includes a handle housing, and the fixed bracket is connected and fixed to the handle housing. The handle housing contains a motor for driving the transmission shaft. In other words, by setting several bearings inside the elbow housing, sleeve, connecting sleeve, and fixed bracket, the bearings provide radial fixation for multiple connecting shafts, stabilizing the coaxiality of the main shaft, ensuring a uniform and stable axial assembly relationship, avoiding vibration during high-frequency operation, effectively preventing energy loss, and improving the accuracy and stability of power transmission and delivery. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0037] Figure 1 This is a structural schematic diagram of the overall cross-section of the present utility model;

[0038] Figure 2 This is a structural diagram showing the disassembled shell and fasteners provided by this utility model;

[0039] Figure 3 This is a schematic diagram of the structure of the motor shaft side provided by this utility model;

[0040] Figure 4 This is a schematic diagram of the bushing shaft side provided by this utility model;

[0041] Figure 5 This is a schematic diagram of the structure of the connecting sleeve shaft side provided by this utility model;

[0042] Figure 6 This is a schematic diagram of the axial side of the fixed bracket provided by this utility model;

[0043] Figure 7 This is an enlarged schematic diagram of the structure at point A provided by this utility model;

[0044] Figure 8 This is a schematic diagram of the axial side of the switch component provided by this utility model.

[0045] Figures 1-8 In the accompanying drawings, the reference numerals include:

[0046] 1. Elbow assembly; 101. Elbow housing; 102. Auxiliary shaft; 103. Second elbow bearing; 104. Output shaft; 105. Elbow rotating shaft; 106. Third elbow bearing; 107. First elbow bearing; 2. Reduction component; 201. Connecting sleeve; 202. Bushing; 203. First reduction bearing; 204. Sleeve; 205. Drive shaft; 207. Fourth reduction bearing; 208. Fixed bracket; 209. Fifth reduction bearing; 210. Gear bracket; 211. Second reduction bearing; 3. Handle assembly; 301. Handle housing; 302. Strike shaft; 303. Motor; 304. Motor upper housing; 305. Motor lower housing; 4. Switch component; 401. Enclosure; 402. Fixing part; 5. Slide rail. Detailed Implementation

[0047] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0048] The core of this utility model is to provide an electric bending tool with a multi-bearing structure, which improves the overall stability and output accuracy during operation by using multiple bearings.

[0049] Please refer to Figures 1-8 An electric bending tool with a multi-bearing structure includes a bending assembly 1, a reduction gear 2, and a handle assembly 3. The bending assembly 1 includes a bending housing 101, inside which is a bending shaft 105 and an output shaft 104. The bending shaft 105 and the output shaft 104 are arranged at a preset angle and rotate synchronously. The bending housing 101 contains a plurality of bending bearings. The reduction gear 2 includes a sleeve 204, a connecting sleeve 201, and a fixed bracket 208 arranged sequentially from left to right and connected to each other. The connecting sleeve 201 and the fixed bracket 208 contain a transmission shaft 205 and a plurality of reduction bearings supporting the transmission shaft 205. The handle assembly 3 includes a handle housing 301, and the fixed bracket 208 is connected and fixed to the handle housing 301. The handle housing 301 contains a motor 303 for driving the transmission shaft 205.

[0050] Optionally, to facilitate quick disassembly of the elbow assembly 1, in some embodiments, the sleeve 204 and the elbow housing 101 are connected by a snap-fit ​​method. Specifically, the elbow housing 101 is provided with an annular groove, and a deformable annular protrusion is provided inside the annular groove. A limiting groove is provided on the inner wall of the sleeve 204. When the annular protrusion enters the limiting groove, the elbow housing 101 and the sleeve 204 are fixed.

[0051] Optionally, the connecting sleeve 201 and the sleeve 204 are connected by threads. Specifically, the diameter of the end of the connecting sleeve 201 connected to the sleeve 204 is smaller than that of the sleeve 204. Because one end of the connecting sleeve 201 is inserted into the sleeve 204 and connected by threads, it is beneficial to improve the fixing effect and also allows for quick disassembly.

[0052] In use, first install the connecting shafts of the elbow assembly 1, the reduction gear 2, and the handle assembly 3 into their corresponding positions. The elbow assembly 1 includes an elbow housing 101, inside which is provided an elbow rotating shaft 105 and an output shaft 104. The elbow rotating shaft 105 and the output shaft 104 are arranged at a preset angle and rotate synchronously. The elbow housing 101 contains several elbow bearings. The reduction gear 2 includes a sleeve 204, a connecting sleeve 201, and a fixed bracket 208 arranged sequentially from left to right and connected to each other. The connecting sleeve 201 and the fixed bracket 208 contain a transmission shaft 205 and several supporting transmission shafts. The reduction bearing of 205, the handle assembly 3 includes a handle housing 301, and a fixed bracket 208 is connected and fixed to the handle housing 301. The handle housing 301 is equipped with a motor 303 for driving the transmission shaft 205. That is to say, by setting several bearings inside the elbow housing 101, sleeve 204, connecting sleeve 201 and fixed bracket 208, the bearings play a role in radially fixing multiple connecting shafts, stabilizing the coaxiality of the main shaft, ensuring a uniform and stable axial assembly relationship, avoiding vibration during high-frequency operation, effectively avoiding energy loss, and improving the stability of power transmission and conveying.

[0053] In some embodiments, the output shaft 104 is mounted on the output end of the elbow housing 101. The output shaft 104 and the elbow rotating shaft 105 are connected by a bevel gear transmission. An auxiliary shaft 102 is fixedly mounted on the side of the output shaft 104 away from the output end and is coaxially mounted. The output end of the elbow housing 101 is equipped with a first elbow bearing 107 for fixing the output shaft 104 and a second elbow bearing 103 for fixing the auxiliary shaft 102. Specifically, the end of the elbow housing 101 away from the sleeve 204 is bent at a preset angle, for example, the output port and The input ports are set at 90 degrees, so the output shaft 104 and the elbow shaft 105 are connected by bevel gear transmission. An auxiliary shaft 102 is provided, which is coaxial with the output shaft 104. A first elbow bearing 107 for fixing the output shaft 104 and a second elbow bearing 103 for fixing the auxiliary shaft 102 are also installed. The bearings are radially fixed at both ends to improve the stability of the output shaft 104 during output, improve the output accuracy, reduce the polarization of the output shaft 104 when rotating at high speed, and greatly reduce the noise during use.

[0054] It should be noted that the connection method between the output shaft 104 and the auxiliary shaft 102 is not limited in this embodiment. In some embodiments, the output shaft 104 and the auxiliary shaft 102 can be fixed by integral molding or welding.

[0055] In some other embodiments, the output shaft 104 is provided with a slot, and the auxiliary shaft 102 is inserted into the slot by interference fitting, so that the output shaft 104 and the auxiliary shaft 102 can be fixed.

[0056] Optionally, the angle of the output end of the elbow housing 101 can be selected according to the usage requirements, and the model of the bevel gear between the output shaft 104 and the elbow shaft 105 can also be customized according to different angles.

[0057] Please refer to Figures 1-8 In some embodiments, the elbow assembly 1 further includes a third elbow bearing 106, which is coaxially arranged with the elbow shaft 105 and used to fix the elbow shaft 105. The third elbow bearing 106 is fixed inside the elbow housing 101. Specifically, the third elbow bearing 106 is positioned close to the contact end between the elbow shaft 105 and the output shaft 104 and meshes with a bevel gear. This increases the radial stability of the elbow shaft 105 and also fixes the position of the elbow shaft 105 by fixing the third elbow bearing 106.

[0058] In some embodiments, the deceleration component 2 further includes a bushing 202, which is located at one end of the connecting sleeve 201 near the elbow assembly 1 and inside the connecting sleeve 201. The bushing 202 is used to fix the end of the elbow shaft 105 away from the output shaft 104, and a first deceleration bearing 203 is provided. The first deceleration bearing 203 is located between the bushing 202 and the elbow housing 101 and is used to radially fix the elbow shaft 105. That is, the end of the elbow shaft 105 is fixed by the first deceleration bearing 203.

[0059] Optionally, the bushing 202 and the elbow housing 101 are connected in an alternating sawtooth structure at their contact positions, which increases the contact area between the bushing 202 and the elbow housing 101, and at the same time fixes the axial rotation direction of the bushing 202 and the elbow housing 101.

[0060] Optionally, a stepped structure is provided on the side of the elbow shaft 105 near the bushing 202, and the first reduction bearing 203 is pressed against the stepped structure. Therefore, the first reduction bearing 203 can not only fix the elbow shaft 105 radially, but also fix its axial position.

[0061] Optionally, the connecting sleeve 201 has a stepped structure inside for axial positioning of the bushing 202. At the same time, the connection positions of the bushing 202 and the elbow housing 101 are also provided with stepped structures, which are combined to form a groove. The first reduction bearing 203 is located inside the groove. Therefore, through the stepped structure here, when the connecting sleeve 201, the sleeve 204 and the elbow housing 101 are connected, the position of each internal component can be limited.

[0062] In some embodiments, the deceleration component 2 further includes a drive shaft 205, a gear bracket 210, and a second deceleration bearing 211. The drive shaft 205 is located inside the connecting sleeve 201. The gear bracket 210 is sleeved on the outside of the drive shaft 205 and installed inside the connecting sleeve 201. The gear bracket 210 is located on the side of the bushing 202 away from the elbow assembly 1. The second deceleration bearing 211 is installed inside the bushing 202 and is used to radially fix the gear bracket 210. Specifically, the drive shaft 205 is connected to the elbow shaft 105 and is radially fixed by externally sleeved gear bracket 210. The drive shaft 205 adopts a multi-stage stepped structure, and the second deceleration bearing 211 is located at the step near the elbow shaft 105 to limit the axial and radial directions of the drive shaft 205.

[0063] In some embodiments, the deceleration component 2 further includes a fourth deceleration bearing 207 and a fifth deceleration bearing 209. The fourth deceleration bearing 207 is located between the fifth deceleration bearing 209 and the second deceleration bearing 211 and is used to radially fix the transmission shaft 205. The fourth deceleration bearing 207 is mounted on a fixed bracket 208. The fifth deceleration bearing 209 is mounted inside the fixed bracket 208 and is located at the overlapping position of the impact shaft 302 and the transmission shaft 205, and is used to radially fix the impact shaft 302. Specifically, the third bearing is located at the multi-step section of the transmission shaft 205 and is fixedly connected to the fixed gear bracket 210, thereby further strengthening the axial and radial fixing effect of the transmission shaft 205. The first deceleration bearing 203 is fixed to the fixed bracket 208 and radially fixes the connection overlap position of the impact shaft 302 and the transmission shaft 205, further improving stability.

[0064] In some embodiments, the handle assembly 3 further includes a striking shaft 302. One end of the striking shaft 302 is located in the handle housing 301, and the other end is located in the fixed bracket 208 and is connected to the transmission shaft 205. The striking shaft 302 is used to perform axial rotation work on the transmission shaft 205. The striking shaft 302 and the transmission shaft 205 are connected by a plug-in connection and are engaged by a spline extending along the axial direction. The fixed bracket 208 is detachably connected to the handle housing 301. After the fixed bracket 208 and the handle housing 301 are disassembled, the deceleration component 2 and the striking component can be separated for easy maintenance and inspection.

[0065] The coaxiality between each component is ensured by the multiple bearing structures arranged along the tool transmission direction, and the coaxial transmission connection of each component is stabilized. This not only effectively fixes each shaft radially, but also uses multiple stepped structures to fix the axial position of each shaft, avoiding the "offset jitter" phenomenon caused by high-speed rotation and high-frequency vibration, thereby improving the torque output accuracy of the bend head transmission shaft 205 and the working shaft.

[0066] Please refer to Figure 3 To improve the accuracy of motor 303 during installation, in some embodiments, motor 303 is provided with an upper motor housing 304 and a lower motor housing 305 for fixing motor 303. The upper motor housing 304 and the lower motor housing 305 are fixed together by bolts. That is, the stator and rotor are fixed by the upper motor housing 304 and the lower motor housing 305 to avoid separation of the stator and rotor during maintenance and disassembly, thereby improving the assembly accuracy of motor 303 and further improving the stability and accuracy of the entire tool use process.

[0067] Please refer to Figure 7 and Figure 8To facilitate the adjustment of the torque of the striking shaft, in some embodiments, the handle housing 301 is provided with an adjustment hole 6, and a switch 4 is provided at the adjustment hole 6. The switch 4 is used to open and close the adjustment hole 6. Specifically, when it is necessary to adjust the torque, pushing or rotating the switch 4 will open the adjustment hole 6, allowing the user to quickly adjust the torque of the striking shaft with the tool. After the adjustment is completed, the switch 4 closes the adjustment hole 6 again to prevent dust contamination and protect the tool.

[0068] Optionally, in some embodiments, the switch 4 includes a closing part 401 and a fixing part 402. The handle housing 301 is provided with a slide rail 5, and the fixing part 402 slides on the slide rail 5. Specifically, since the fixing part 402 is a plate-shaped structure, the fixing part 402 slides on the slide rail 5 to realize the closing or opening of the switch 4 and the adjustment hole 6.

[0069] Optionally, in some embodiments, the closing part 401 and the fixing part 402 are arranged at a preset angle. When the closing part 401 is placed at the adjustment hole 6, the adjustment hole 6 is closed. Specifically, the connection between the closing part 401 and the fixing part 402 is provided with a pre-tightening force to drive the closing part 401 to move away from the fixing part 402. By using the preset angle, there is a pre-tightening force between the closing part 401 and the handle housing 301. When the closing part 401 moves to the adjustment hole 6, it automatically enters the interior of the adjustment hole 6, thereby closing the adjustment hole 6.

[0070] Optionally, in some embodiments, the closing part 401 and the fixing part 402 are made of plastic and are integrally molded. By utilizing the material properties of the plastic itself, a certain elastic pre-tightening force is achieved between the closing part 401 and the fixing part 402.

[0071] In other words, the key point of this utility model is: installing the connecting shafts of the elbow assembly 1, the deceleration component 2, and the handle assembly 3 into their corresponding positions. The elbow assembly 1 includes an elbow housing 101, inside which is provided an elbow rotating shaft 105 and an output shaft 104. The elbow rotating shaft 105 and the output shaft 104 are arranged at a preset angle and rotate synchronously. Inside the elbow housing 101 are provided several elbow bearings. The deceleration component 2 includes a sleeve 204, a connecting sleeve 201, and a fixed bracket 208 arranged sequentially from left to right and connected to each other. Inside the connecting sleeve 201 and the fixed bracket 208 is a transmission shaft 205 and several supports. The reduction bearing of the drive shaft 205, the handle assembly 3 includes a handle housing 301, and a fixed bracket 208 is connected and fixed to the handle housing 301. The handle housing 301 is equipped with a motor 303 for driving the drive shaft 205. That is to say, by setting several bearings inside the elbow housing 101, sleeve 204, connecting sleeve 201 and fixed bracket 208, the radial fixing of multiple connecting shafts is achieved under the action of several bearings, stabilizing the coaxiality of the main shaft, ensuring a uniform and stable axial assembly relationship, avoiding vibration during high-frequency operation, effectively avoiding energy loss, and improving the accuracy and stability of power transmission and delivery.

[0072] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0073] The above provides a detailed description of the electric elbow tool with a multi-bearing structure provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that those skilled in the art can make several improvements and modifications to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. An electric bending tool with a multi-bearing structure, characterized in that, include: Elbow assembly (1), the elbow assembly (1) includes elbow housing (101), the elbow housing (101) is provided with elbow shaft (105) and output shaft (104) inside, the elbow shaft (105) and the output shaft (104) are arranged at a preset angle and rotate synchronously, and the elbow housing (101) is provided with a plurality of elbow bearings inside; The deceleration component (2) includes a sleeve (204), a connecting sleeve (201) and a fixed bracket (208) arranged and connected from left to right. The connecting sleeve (201) and the fixed bracket (208) are provided with a transmission shaft (205) and a plurality of deceleration bearings supporting the transmission shaft (205). The handle assembly (3) includes a handle housing (301) and a fixing bracket (208). The fixing bracket (208) is connected to the handle housing (301). The handle housing (301) is provided with a motor (303) for driving the transmission shaft (205).

2. The electric bending tool with a multi-bearing structure according to claim 1, characterized in that, The output shaft (104) is installed at the output end of the elbow housing (101). The output shaft (104) and the elbow shaft (105) are connected by bevel gear transmission. An auxiliary shaft (102) is fixedly installed on the side of the output shaft (104) away from the output end and is installed coaxially. The output end of the elbow housing (101) is equipped with a first elbow bearing (107) for fixing the output shaft (104) and a second elbow bearing (103) for fixing the auxiliary shaft (102).

3. The electric bending tool with a multi-bearing structure according to claim 2, characterized in that, The elbow assembly (1) also includes: The third elbow bearing (106) is coaxially arranged with the elbow shaft (105) and is used to fix the elbow shaft (105). The third elbow bearing (106) is fixed inside the elbow housing (101).

4. The electric bending tool with a multi-bearing structure according to claim 1, characterized in that, The deceleration component (2) also includes: Bushing (202), the bushing (202) is located at one end of the connecting sleeve (201) near the elbow assembly (1) and is located inside the connecting sleeve (201); The first reduction bearing (203) is located between the bushing (202) and the elbow housing (101) and is used to radially fix the elbow shaft (105); The bushing (202) and the elbow housing (101) are connected in an alternating sawtooth structure at their contact points.

5. The electric bending tool with a multi-bearing structure according to claim 4, characterized in that, The deceleration component (2) also includes: A drive shaft (205) is located inside the connecting sleeve (201); Gear bracket (210), the gear bracket (210) is sleeved on the outside of the drive shaft (205) and installed inside the connecting sleeve (201), the gear bracket (210) is located on the side of the bushing (202) away from the elbow assembly (1); The second reduction bearing (211) is installed inside the bushing (202) and is used to radially fix the gear bracket (210).

6. The electric bending tool with a multi-bearing structure according to claim 5, characterized in that, The handle assembly (3) further includes: The striking shaft (302) has one end located in the handle housing (301) and the other end located in the fixed bracket (208), and is connected to the drive shaft (205) for transmission. The striking shaft (302) is connected to the transmission shaft (205) by a plug-in connection, and the fixed bracket (208) is detachably connected to the handle housing (301).

7. The electric bending tool with a multi-bearing structure according to claim 6, characterized in that, The deceleration component (2) also includes: The fifth reduction bearing (209) is installed in the fixed bracket (208) and located at the overlapping position of the striking shaft (302) and the transmission shaft (205) for radial fixing of the striking shaft (302).

8. The electric bending tool with a multi-bearing structure according to claim 7, characterized in that, The deceleration component (2) also includes: The fourth reduction bearing (207) is located between the fifth reduction bearing (209) and the second reduction bearing (211) and is used to radially fix the drive shaft (205). The fourth reduction bearing (207) is mounted on the fixed bracket (208).

9. An electric bending tool with a multi-bearing structure according to any one of claims 1-8, characterized in that, The sleeve (204) is connected to the elbow housing (101) by a snap-fit ​​method, and the connecting sleeve (201) is connected to the sleeve (204) by a thread.

10. An electric bending tool with a multi-bearing structure according to any one of claims 1-8, characterized in that, The motor (303) is provided with an upper motor housing (304) and a lower motor housing (305) for fixing the motor (303), and the upper motor housing (304) and the lower motor housing (305) are fixed together by bolts.

11. An electric bending tool with a multi-bearing structure according to any one of claims 1-8, characterized in that, The handle housing (301) is provided with an adjustment hole (6), and a switch (4) is provided at the adjustment hole (6). The switch (4) is used to open and close the adjustment hole (6).

12. The electric bending tool with a multi-bearing structure according to claim 11, characterized in that, The switch (4) includes a closing part (401) and a fixing part (402). The closing part (401) and the fixing part (402) are arranged at a preset angle. When the closing part (401) is placed at the adjustment hole (6), the adjustment hole (6) is closed.

13. The electric bending tool with a multi-bearing structure according to claim 12, characterized in that, The closure part (401) and the fixing part (402) are made of plastic and are integrally molded.

14. The electric bending tool with a multi-bearing structure according to claim 13, characterized in that, The handle housing (301) is provided with a slide (5), and the fixing part (402) slides on the slide (5).

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