A rotating laser welding apparatus

Abstract

The application relates to the technical field of rotary laser welding equipment, in particular to a rotary laser welding equipment which comprises a mounting base, the upper end of the mounting base is provided with a rotating mechanism, the rotating mechanism is provided with a regulating and controlling assembly, and the regulating and controlling assembly is provided with a laser welding assembly at one end. The motor assembly and the hydraulic telescopic assembly are matched, the rotating direction of the ratchet assembly can be quickly adjusted, the motor assembly can quickly control the corresponding components to swing in the positive and negative directions under the condition of directional output, the deflection accuracy of the corresponding components is improved, the laser welding assembly can be accurately controlled to adjust, the laser welding assembly can be accurately matched with the welding part, and the quality of laser welding is improved.

Description

Technical Field

[0001] This invention relates to the field of rotary laser welding equipment technology, and more particularly to a rotary laser welding device. Background Technology

[0002] In the prior art, for welding automotive parts, a rotatable laser welding device for processing automotive safety parts is disclosed in publication number CN119016875A. This device includes a processing platform, a support column, a support unit, and a straightening unit. The present invention can solve the following problems existing in the prior art: when clamping pipes, the pipes cannot be kept horizontally and are not subjected to mutual compression during rotation, resulting in a lack of stability. Therefore, gaps easily form at the joint of the two pipes during rotation, causing them to be unable to be on the same axis, affecting the joint accuracy and welding effect.

[0003] The above technology can adaptively limit and fix the drive shaft and shaft fork respectively, so that they can be accurately connected without adjustment; during the welding process, the rotation of the welding torch is controlled so that the drive shaft and shaft fork remain relatively stationary, thereby ensuring the stability of the drive shaft and shaft fork and avoiding the inability of the drive shaft and shaft fork to be on the same axis, which would affect the welding accuracy.

[0004] The aforementioned technology rotates the welding torch in the rotary laser welding equipment. However, it uses a motor to control the rotation of the robotic arm. In conventional solutions, the rotation direction of the robotic arm is adjusted by controlling the forward and reverse rotation of the motor. This requires the control components to constantly adjust the connection between the motor components and the power supply, which can easily lead to damage to the motor components and the power supply connection components, affecting the stable operation of the equipment. Therefore, improvements are needed. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a rotary laser welding device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A rotary laser welding device includes a mounting base, a rotating mechanism at the upper end of the mounting base, an adjustment component on the rotating mechanism, and a laser welding component mounted at one end of the adjustment component.

[0008] The rotating mechanism is provided with three bearing housings. A second sleeve assembly with an internal gear ring is rotatably sleeved inside the three bearing housings. A control shaft is passed through the second sleeve assembly with an internal gear ring. The control shaft is rotatably sleeved on the bearing housing. One end of the control shaft located inside the second sleeve assembly with an internal gear ring is rotatably sleeved with a first sleeve assembly with an internal gear ring. Both the second and first sleeve assemblies with internal gear rings are equipped with ratchet assemblies, and both ratchet assemblies are connected to the control shaft.

[0009] An adjustment mechanism is installed on one end sidewall inside the bearing housing, and the adjustment mechanism is provided with a first reciprocating abutment and a second reciprocating abutment.

[0010] An input shaft is rotatably sleeved on one side wall inside the bearing housing. A second linkage disc is fixed to one end of the input shaft. One end of the second linkage disc extends into the second sleeve assembly with an internal gear ring. Two first linkage discs are rotatably sleeved on the second linkage disc. One end of one first linkage disc is fixed with a first gear. One end of the first gear extends into the first sleeve assembly with an internal gear ring and meshes with it. One end of the other first linkage disc is fixed with a third gear. The third gear is provided with a reversing mechanism, which is connected to the second sleeve assembly with an internal gear ring.

[0011] A motor assembly is installed at one end of the input shaft that extends out of the bearing housing, and the motor assembly is connected to the bearing housing;

[0012] The first reciprocating abutment is sleeved on the second linkage plate, and the first reciprocating abutment is located between the two first linkage plates;

[0013] The second reciprocating contact member is provided with a contact mechanism, which corresponds to the first sleeve assembly with an internal toothed ring and the second sleeve assembly with an internal toothed ring.

[0014] Compared with the prior art, this application can quickly adjust the rotation direction of the ratchet assembly by cooperating with the motor assembly and the hydraulic telescopic assembly. This ensures that the motor assembly can quickly control the corresponding components to swing in both directions when outputting in a directional manner, and also helps to improve the deflection accuracy of the corresponding components. This allows for precise control of the laser welding assembly for adjustment, facilitating accurate alignment between the laser welding assembly and the part to be welded, and improving the quality of laser welding.

[0015] Preferably, the rotating mechanism includes a second rotating arm mounted on the end of the control assembly away from the laser welding assembly, and a connecting assembly is mounted on the end of the second rotating arm away from the control assembly;

[0016] The upper bearing housing is connected to the connecting assembly. The first rotating arm is mounted on the ratchet assembly inside the upper bearing housing. The other two bearing housings are located at the lower end of the first rotating arm.

[0017] The ratchet assembly located inside the central bearing housing is fixedly connected to the lower end of the first rotating arm;

[0018] The lowermost support housing is fixedly connected to the mounting base, and the ratchet assembly inside the support housing is fixedly connected to the support housing in the middle.

[0019] Furthermore, the three support housings are set at different heights, which facilitates connection with corresponding components to effectively complete the rotation operation of the welding equipment; the rotation of the ratchet assembly inside the support housing connected to the mounting base can cause the support housing fixed to it to deflect around the axis of the ratchet assembly, thereby causing the overall orientation of the upper component to deflect.

[0020] The ratchet assembly located in the middle bearing housing can drive the first rotating arm to deflect. It can cooperate with the ratchet assembly located in the upper bearing housing to drive the connecting assembly to deflect, so as to effectively adjust the deflection angle and height of the second rotating arm. The second rotating arm can drive the control assembly to operate, so that the control assembly can control the laser welding assembly. Through the above cooperation, the laser welding assembly can be precisely aligned with the position to be welded.

[0021] Furthermore, in actual production, corresponding sensing components and other supporting parts are installed on the ratchet assembly, the second rotating arm, the control assembly, and the laser welding assembly. The addition of corresponding components is in line with the production conditions of the corresponding robotic arm, and corresponding modifications are made according to this equipment. For example, the ratchet assembly's deflection angle can be recorded and controlled through the sensing components. The recording and control schemes are existing technologies and do not need to be explained again. At the same time, this equipment also needs to be connected to an external power supply and corresponding control equipment to accurately control the corresponding automated components of this application. These are all existing technologies and do not need to be explained again.

[0022] Preferably, a support base is installed at the lower end of the mounting base.

[0023] Furthermore, the support base can adapt to different substrate conditions to ensure the stability of the mounting base during installation. For example, corresponding screw structures can be installed on the support base to adjust the length of the lower end extension at different positions of the support base to adapt to different substrates.

[0024] Preferably, the adjusting mechanism includes a hydraulic telescopic assembly installed on one side wall inside the bearing housing. The piston rod of the hydraulic telescopic assembly extends into the second sleeve assembly with an internal gear ring. A connecting frame is fixed to the end of the piston rod of the hydraulic telescopic assembly. The second reciprocating contact member is fixed to the lower end of the connecting frame, and the first reciprocating contact member is rotatably sleeved on the upper end of the connecting frame.

[0025] Furthermore, the operator can control the piston rod of the hydraulic telescopic assembly to extend and retract. When the hydraulic telescopic assembly extends to the point where the first reciprocating contact member contacts the first linkage disc at the front end, the first gear can rotate. When the piston rod of the hydraulic telescopic assembly retracts, the first reciprocating contact member contacts the first linkage disc at the rear end, driving the third gear to rotate. In actual production, the proportions of the third gear, the second gear, and the inner gear ring of the second sleeve assembly with an internal gear ring are precisely measured, and the proportions of the first gear and the inner gear ring of the first sleeve assembly with an internal gear ring are calculated. The corresponding calculations are performed to ensure that the angular velocity of the second sleeve assembly with an internal gear ring is the same as that of the first sleeve assembly with an internal gear ring. The above calculation scheme is common knowledge in the field and does not need to be explained again.

[0026] Meanwhile, in the actual production process, the first reciprocating contact component is an I-shaped wheel structure, and the surfaces that contact the first linkage disc are all machined accordingly to ensure that force can be transmitted after contact and that it can drive the corresponding components in the equipment. For example, corresponding toothed structures are set on the contact surfaces to ensure that they can mesh with each other and ensure the stability of power transmission.

[0027] Preferably, the reversing mechanism includes a connecting shaft rotatably sleeved on one end sidewall of the bearing housing, one end of the connecting shaft is fixed with a second gear, the second gear is located inside the second sleeve assembly with an internal gear ring, and the second gear meshes with the second sleeve assembly with an internal gear ring;

[0028] The lower end of the second gear meshes with the third gear.

[0029] Furthermore, when the first reciprocating contact member contacts the first linkage disc located at the front end, it can drive the first gear to rotate. The first gear meshes with the gear ring inside the first sleeve assembly with internal gear ring, which can cause the first sleeve assembly with internal gear ring to rotate in the same direction as the first gear. When the first reciprocating contact member contacts the first linkage disc located at the rear end, it can cause the third gear to rotate. The third gear can drive the second gear to rotate, but the rotation direction of the second gear is opposite to that of the third gear. This will cause the rotation direction of the second sleeve assembly with internal gear ring to be opposite to that of the third gear, that is, the rotation direction of the second sleeve assembly with internal gear ring is opposite to that of the first sleeve assembly with internal gear ring.

[0030] Preferably, one end of the second reciprocating contact member is fixed with an adaptation component, which is connected to one end inside the bearing housing.

[0031] Furthermore, the adapting component consists of a telescopic component and a spring component, which can adapt to the movement of the second reciprocating abutment and at the same time facilitate the provision of a restoring force to the second reciprocating abutment.

[0032] Preferably, the abutting mechanism includes a second swing rod rotatably connected to one side of the second reciprocating abutting member, a first swing rod penetrating through the second reciprocating abutting member, and rotating connecting members rotatably connected to both ends of the first swing rod. One of the rotating connecting members is slidably installed on one end sidewall inside the second reciprocating abutting member. Both the second swing rod and the other rotating connecting member are provided with a pulling mechanism, and the pulling mechanism is provided with a first linkage plate and a horizontal shaft.

[0033] Two oblique push rods are rotatably connected to one end of the first linkage plate. A support plate is fixed to one end of the horizontal shaft. An abutment shaft is rotatably sleeved on one end of the support plate. A movable abutment friction member is slidably installed on the horizontal shaft. One end of the movable abutment friction member corresponds to the abutment shaft. One end of each of the two oblique push rods is rotatably connected to one side of the movable abutment friction member.

[0034] Both abutting shafts are disposed between the first sleeve assembly with internal gear ring and the second sleeve assembly with internal gear ring, and the two abutting shafts abut against the first sleeve assembly with internal gear ring and the second sleeve assembly with internal gear ring, respectively.

[0035] Furthermore, in actual operation, the two abutting shafts abut against the inner wall of the second sleeve assembly with internal gear ring and the outer side of the first sleeve assembly with internal gear ring, respectively. That is, when the first reciprocating abutting member abuts against the first linkage disc located at the front end, the second reciprocating abutting member will also move to the left, which will drive the second swing rod to pull the second linkage plate connected to the second swing rod to move. The abutting shaft located on one side of the second swing rod abuts against the inner wall of the second sleeve assembly with internal gear ring. When the second linkage plate moves with the second swing rod, the moving abutting friction member abuts against the abutting shaft, causing the abutting shaft to stop rotating. At this time, the second sleeve assembly with internal gear ring will stop rotating, which facilitates the rotation of the first sleeve assembly with internal gear ring.

[0036] Furthermore, since the first swing rod is slidably mounted on the inner wall of the second reciprocating contact member through a rotating connector, and the middle part of the first swing rod rotates around one end of the U-shaped connecting shaft through a U-shaped connecting shaft, and the U-shaped connecting shaft is fixedly connected to the fixing member, this allows the first swing rod to push another second linkage plate to move to the right when the second swing rod pulls the second linkage plate to move to the left, so that the other moving contact friction member will not affect the rotation of the contact shaft;

[0037] In actual operation, the positional relationship between the contact shaft and the moving contact friction component is controlled to facilitate rapid contact.

[0038] Preferably, the pulling mechanism includes two fixing members, both of which are fixed to one side wall inside the bearing housing. A second linkage plate is slidably mounted on each of the two fixing members, and two first linkage plates are slidably mounted on the fixing members respectively. A return spring assembly is sleeved on the fixing member. The return spring assembly is located between the first linkage plate and the second linkage plate on the same fixing member, and the two ends of the return spring assembly are respectively fixed to the opposite end of the same first linkage plate and the second linkage plate.

[0039] The horizontal shaft is slidably mounted on the fixed part, one end of the second swing rod is rotatably connected to one of the second linkage plates, another rotating connecting part is slidably mounted on another second linkage plate, and a U-shaped connecting shaft is fixed on another fixed part, one end of the U-shaped connecting shaft is rotatably sleeved on the first swing rod.

[0040] Furthermore, when the second linkage plate is driven, it will apply an external force to the return spring assembly. The force on the return spring assembly will deform it and transmit it to the first linkage plate, enabling the first linkage plate to move on the fixed part. The movement of the first linkage plate can drive the moving abutment friction part to move through the inclined push rod part, so as to control whether the moving abutment friction part abuts against the abutment shaft.

[0041] In actual operation, when the second swing arm moves to the left following the second reciprocating contact, it causes the second linkage plate connected to the second swing arm to move to the left, squeezing the return spring assembly and causing the first linkage plate to push the moving contact friction member and the contact shaft to abut through the inclined push rod, so that the second sleeve assembly with internal gear ring cannot rotate. At this time, the first sleeve assembly with internal gear ring can rotate. At the same time, the second reciprocating contact moves to the left, causing the first swing arm to rotate, which can push the second linkage plate corresponding to the first swing arm to move to the right, so that the other contact shaft can rotate, which facilitates the rotation of the first sleeve assembly with internal gear ring.

[0042] Preferably, multiple grooves are provided at equal intervals on the circumferential sidewall of the first sleeve assembly with internal gear ring and the circumferential sidewall of the second sleeve assembly with internal gear ring, and multiple synchronous shafts are installed at equal intervals on the circumferential sidewalls of the two contact shafts.

[0043] Multiple synchronous shafts on one of the contact shafts correspond to multiple grooves on the inner wall of the second sleeve assembly with an internal gear ring;

[0044] Multiple synchronous shafts on another abutting shaft correspond to multiple grooves on the outside of the first sleeve assembly with an internal gear ring.

[0045] Furthermore, by correspondingly setting the synchronous shaft and the groove, it is possible to improve the ability of the corresponding second sleeve assembly with internal gear ring or the first sleeve assembly with internal gear ring to stop moving when the abutting shaft is stationary.

[0046] Preferably, the ratchet assembly includes ratchet rings, two ratchet rings are respectively fixed on the second sleeve assembly with internal gear rings and the first sleeve assembly with internal gear rings, ratchet levers are rotatably connected to the control shaft, one end of each ratchet lever abuts against the inner wall of the two ratchet rings, and a tension spring is fixed to one side of each ratchet lever, and the tension springs are all fixedly connected to the control shaft;

[0047] Two ratchet rings are located inside and outside the second sleeve assembly with an internal toothed ring, respectively. The ratchet ring inside the second sleeve assembly with an internal toothed ring is fixedly connected to the first sleeve assembly with an internal toothed ring, and the ratchet ring outside the second sleeve assembly with an internal toothed ring is fixedly connected to the second sleeve assembly with an internal toothed ring.

[0048] The two ratchet rings and ratchet rods located inside and outside the second sleeve assembly with internal toothed rings are arranged in opposite directions.

[0049] Furthermore, by reversing the ratchet ring and ratchet lever, it can be effectively made to rotate synchronously with the connected components. For example, when the first sleeve assembly with an internal gear ring can rotate while the second sleeve assembly with an internal gear ring cannot rotate, the ratchet ring fixed to the first sleeve assembly with an internal gear ring will abut against one end of the ratchet lever, causing the ratchet lever to push the control shaft to rotate. At this time, the ratchet lever fixed to the second sleeve assembly with an internal gear ring can rotate within the ratchet ring fixed to the second sleeve assembly with an internal gear ring under the action of the control shaft.

[0050] Furthermore, the action of the tension spring allows one end of the ratchet lever to continuously fall onto the teeth inside the ratchet ring.

[0051] The beneficial effects of this invention are:

[0052] 1. The three bearing housings are set at different heights, which facilitates connection with corresponding components to effectively complete the rotation operation of the welding equipment; the rotation of the ratchet assembly in the bearing housing connected to the mounting base can cause the bearing housing fixed to it to deflect around the axis of the ratchet assembly, thereby driving the overall orientation of the upper component to deflect.

[0053] The ratchet assembly located in the middle bearing housing can drive the first rotating arm to deflect. It can cooperate with the ratchet assembly located in the upper bearing housing to drive the connecting assembly to deflect, so as to effectively adjust the deflection angle and height of the second rotating arm. The second rotating arm can drive the control assembly to operate, so that the control assembly can control the laser welding assembly. Through the above cooperation, the laser welding assembly can be precisely aligned with the position to be welded. Moreover, the motor assembly can complete the forward and reverse phase adjustment of the control shaft with unidirectional output, which helps to extend the service life of the motor assembly. At the same time, by controlling the diameter ratio between the gear and the sleeve assembly with internal gear ring in this application and controlling the corresponding teeth on them, the output angle can be precisely controlled. Because in this case, the linear velocity of the gear rotation is the same as the linear velocity of the sleeve assembly with internal gear ring. By setting different ratio schemes, the purpose of precisely controlling the rotation angle of the sleeve assembly with internal gear ring can be achieved.

[0054] 2. The operator can control the piston rod of the hydraulic telescopic assembly to extend and retract. When the hydraulic telescopic assembly extends to the point where the first reciprocating contact member contacts the first linkage disc at the front end, the first gear can rotate. When the piston rod of the hydraulic telescopic assembly retracts, the first reciprocating contact member contacts the first linkage disc at the rear end, driving the third gear to rotate. In actual production, the proportions of the third gear, the second gear, and the inner gear ring of the second sleeve assembly with an inner gear ring are accurately measured. The proportions of the first gear and the inner gear ring of the first sleeve assembly with an inner gear ring are calculated, and corresponding calculations are performed to ensure that the angular velocity of the second sleeve assembly with an inner gear ring is the same as that of the first sleeve assembly with an inner gear ring.

[0055] 3. When the first reciprocating contact member contacts the first linkage disc located at the front end, it can drive the first gear to rotate. The first gear meshes with the gear ring inside the first sleeve assembly with internal gear ring, which can make the first sleeve assembly with internal gear ring rotate in the same direction as the first gear. When the first reciprocating contact member contacts the first linkage disc located at the rear end, it can drive the third gear to rotate. The third gear can drive the second gear to rotate, but the rotation direction of the second gear is opposite to that of the third gear. This will make the rotation direction of the second sleeve assembly with internal gear ring opposite to that of the third gear, that is, the rotation direction of the second sleeve assembly with internal gear ring is opposite to that of the first sleeve assembly with internal gear ring.

[0056] 4. In actual operation, the two abutting shafts abut against the inner wall of the second sleeve assembly with internal gear ring and the outer side of the first sleeve assembly with internal gear ring, respectively. That is, when the first reciprocating abutting member abuts against the first linkage plate located at the front end, the second reciprocating abutting member will also move to the left, which will drive the second swing rod to pull the second linkage plate connected to the second swing rod to move. The abutting shaft located on one side of the second swing rod abuts against the inner wall of the second sleeve assembly with internal gear ring. When the second linkage plate moves with the second swing rod, the moving abutting friction member abuts against the abutting shaft, so that the abutting shaft stops rotating. At this time, the second sleeve assembly with internal gear ring will stop rotating, which facilitates the rotation of the first sleeve assembly with internal gear ring.

[0057] Because the first swing rod is slidably mounted on the inner wall of the second reciprocating contact member through a rotating connector, and the middle part of the first swing rod rotates around one end of the U-shaped connecting shaft through a U-shaped connecting shaft, and the U-shaped connecting shaft is fixedly connected to the fixing member, this allows the first swing rod to push another second linkage plate to move to the right when the second swing rod pulls the second linkage plate to move to the left, so that the other moving contact friction member will not affect the rotation of the contact shaft;

[0058] In actual operation, the positional relationship between the contact shaft and the moving contact friction component is controlled to facilitate rapid contact;

[0059] 5. In actual operation, the rotation range of the control axis can be set to restrict its rotation, thus ensuring the stability of the connection of the corresponding automated components in the equipment. Attached Figure Description

[0060] Figure 1 This is a front view of the present invention;

[0061] Figure 2 This is a structural diagram of the present invention;

[0062] Figure 3 This is a top view of the present invention;

[0063] Figure 4 This is a diagram showing the internal structure of the supporting shell in this invention;

[0064] Figure 5 This is a structural diagram of the second sleeve assembly with an internal toothed ring and the first sleeve assembly with an internal toothed ring in this invention.

[0065] Figure 6 This is a connection structure diagram of the contact shaft, the movable contact friction element, the horizontal shaft element, and the fixing element in this invention;

[0066] Figure 7 This is a diagram showing the meshing structure of the third gear and the second gear in this invention;

[0067] Figure 8 Appendix to this invention Figure 4 Enlarged view of point A;

[0068] Figure 9 This is a structural diagram of the ratchet assembly in this invention;

[0069] Figure 10 This is a schematic diagram of the connection structure of the first pendulum member in this invention.

[0070] In the diagram: 1. Support base, 2. Mounting base, 3. Motor assembly, 4. Support housing, 5. First rotating arm, 6. Connecting assembly, 7. Second rotating arm, 8. Adjustment assembly, 9. Laser welding assembly, 10. Ratchet assembly, 1001. Ratchet ring, 1002. Ratchet rod, 1003. Tension spring, 11. Control shaft, 12. First sleeve assembly with internal gear ring, 13. First gear, 14. Second sleeve assembly with internal gear ring, 15. Connecting shaft, 16. Input shaft, 17. Hydraulic telescopic assembly, 1 8 Synchronous shaft, 19 Abutting shaft, 20 Horizontal shaft, 21 Moving abutting friction component, 22 Inclined push rod, 23 First linkage plate, 24 Return spring assembly, 25 Second linkage plate, 26 Fixing component, 27 Second gear, 28 Third gear, 29 First linkage disc, 30 First reciprocating abutting component, 31 Second linkage disc, 32 Connecting frame, 33 Second reciprocating abutting component, 34 First swing rod, 35 Second swing rod, 36 Adaptive component, 37 Groove, 38 Support plate, 39 U-shaped connecting shaft, 40 Rotating connecting component. Detailed Implementation

[0071] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0072] Reference Figure 1-10 A rotary laser welding device includes a mounting base 2, a rotating mechanism at the upper end of the mounting base 2, an adjustment component 8 on the rotating mechanism, and a laser welding component 9 mounted at one end of the adjustment component 8. With the cooperation of the rotating mechanism, the height and position of the adjustment component 8 and the laser welding component 9 can be fully controlled, so as to facilitate the correspondence between the laser welding component 9 and the part to be welded, and to effectively carry out high-quality laser welding operations.

[0073] In this embodiment, the rotating mechanism is provided with three bearing housings 4. A second sleeve assembly 14 with an internal gear ring is rotatably sleeved inside the three bearing housings 4. A control shaft 11 is passed through the second sleeve assembly 14 with an internal gear ring and is rotatably sleeved on the bearing housing 4. One end of the control shaft 11 located inside the second sleeve assembly 14 with an internal gear ring is rotatably sleeved with a first sleeve assembly 12 with an internal gear ring. Both the second sleeve assembly 14 with an internal gear ring and the first sleeve assembly 12 with an internal gear ring are equipped with ratchet assemblies 10. Both ratchet assemblies 10 are connected to... The control shaft 11 is connected; by setting three bearing housings 4, it is possible to effectively complete the adjustment in different directions. The bottom bearing housing 4 can realize the overall rotation, and the two bearing housings 4 at the top can realize the deflection of the first rotating arm 5 and the second rotating arm 7. At the same time, through the action of the ratchet assembly 10, the rotation of the first sleeve assembly 12 with internal gear ring and the second sleeve assembly 14 with internal gear ring can be fully transmitted, so that the control shaft 11 can rotate according to the situation, and can ensure that the rotation direction of the control shaft 11 can be adjusted when the motor assembly 3 outputs in one direction.

[0074] In this embodiment, an adjustment mechanism is installed on one side wall inside the housing 4. The adjustment mechanism is provided with a first reciprocating contact 30 and a second reciprocating contact 33. The position of the first reciprocating contact 30 and the second reciprocating contact 33 can be adjusted by the adjustment mechanism, and the rotation of the first sleeve assembly 12 with internal gear ring and the second sleeve assembly 14 with internal gear ring can be realized by adjusting the position of the first reciprocating contact 30 and the second reciprocating contact 33.

[0075] In this embodiment, an input shaft 16 is rotatably sleeved on one side wall of the housing 4. A second linkage disk 31 is fixed to one end of the input shaft 16. One end of the second linkage disk 31 extends into the second sleeve assembly 14 with an internal gear ring. Two first linkage disks 29 are rotatably sleeved on the second linkage disk 31. One end of one first linkage disk 29 is fixed with a first gear 13. One end of the first gear 13 extends into the first sleeve assembly 12 with an internal gear ring and meshes with the first sleeve assembly 12 with an internal gear ring. One end of the other first linkage disk 29 is fixed with a third gear 28. The third gear 28 is provided with a reversing mechanism, which is connected to the second sleeve assembly 14 with an internal gear ring. The first gear 13 meshes with the gear ring in the first sleeve assembly 12 with an internal gear ring, which can drive the first sleeve assembly 12 with an internal gear ring and the first gear 13 to rotate in the same direction. Through the cooperation of the reversing mechanism, the second sleeve assembly 14 with an internal gear ring and the first sleeve assembly 12 with an internal gear ring can rotate in opposite directions.

[0076] In this embodiment, a motor assembly 3 is installed at one end of the input shaft 16 extending out of the bearing housing 4, and the motor assembly 3 is connected to the bearing housing 4; a first reciprocating contact member 30 is sleeved on the second linkage disc 31, and the first reciprocating contact member 30 is located between the two first linkage discs 29; the second reciprocating contact member 33 is provided with a contact mechanism, which corresponds to the first sleeve assembly 12 with an internal gear ring and the second sleeve assembly 14 with an internal gear ring. The motor assembly 3 enables power input, which facilitates the rotation of the second sleeve assembly 14 with an internal gear ring. The two first linkage discs 29 respectively contact the first reciprocating contact member 30 to achieve power switching, and the contact mechanism controls the rotation of the first sleeve assembly 12 with an internal gear ring or the second sleeve assembly 14 with an internal gear ring.

[0077] In this embodiment, the rotating mechanism includes a second rotating arm 7 installed at the end of the control component 8 away from the laser welding component 9, and a connecting component 6 is installed at the end of the second rotating arm 7 away from the control component 8;

[0078] The upper bearing housing 4 is connected to the connecting assembly 6. The ratchet assembly 10 inside the upper bearing housing 4 is equipped with the first rotating arm 5. The other two bearing housings 4 are located at the lower end of the first rotating arm 5.

[0079] The ratchet assembly 10 located inside the central bearing housing 4 is fixedly connected to the lower end of the first rotating arm 5;

[0080] The bearing housing 4 at the lowest end is fixedly connected to the mounting base 2, and the ratchet assembly 10 inside the bearing housing 4 is fixedly connected to the bearing housing 4 in the middle.

[0081] The three support housings 4 are respectively set at different heights, which can facilitate connection with corresponding components to effectively complete the rotation operation of the welding equipment; the rotation of the ratchet assembly 10 inside the support housing 4 connected to the mounting base 2 can cause the support housing 4 fixed to it to deflect around the axis of the ratchet assembly 10, thereby driving the overall orientation of the upper component to deflect.

[0082] The ratchet assembly 10 located in the middle bearing housing 4 can drive the first rotating arm 5 to deflect. It can cooperate with the ratchet assembly 10 located in the upper bearing housing 4 to drive the connecting assembly 6 to deflect, so as to effectively adjust the deflection angle and height of the second rotating arm 7. The second rotating arm 7 can drive the control assembly 8 to operate, so that the control assembly 8 can control the laser welding assembly 9. Through the above cooperation, the laser welding assembly 9 can be precisely aligned with the position to be welded.

[0083] In this embodiment, a support base 1 is installed at the lower end of the mounting base 2. The support base 1 can adapt to different base conditions to ensure the stability of the mounting base 2 during installation. For example, a corresponding screw structure can be installed on the support base 1 to adjust the length of the lower end of the support base 1 at different positions to adapt to different bases.

[0084] In this embodiment, the adjusting mechanism includes a hydraulic telescopic assembly 17 installed on one side wall of the bearing housing 4. The piston rod of the hydraulic telescopic assembly 17 extends into the second sleeve assembly 14 with an internal gear ring. A connecting frame 32 is fixed to the end of the piston rod of the hydraulic telescopic assembly 17. A second reciprocating contact member 33 is fixed to the lower end of the connecting frame 32, and a first reciprocating contact member 30 is rotatably sleeved on the upper end of the connecting frame 32. The operator can control the piston rod of the hydraulic telescopic assembly 17 to extend and retract. When the hydraulic telescopic assembly 17 extends to the point where the first reciprocating contact member 30 abuts against the first linkage disc 29 located at the front end, the first gear ring... When the wheel 13 rotates, the piston rod of the hydraulic telescopic assembly 17 retracts, causing the first reciprocating contact member 30 to contact the first linkage disc 29 located at the rear end, which drives the third gear 28 to rotate. In actual production, the ratio of the third gear 28, the second gear 27, and the inner gear ring of the second sleeve assembly 14 with an inner gear ring is accurately measured, and the ratio of the first gear 13 to the inner gear ring of the first sleeve assembly 12 with an inner gear ring is calculated. The corresponding calculations are performed to ensure that the angular velocity of the second sleeve assembly 14 with an inner gear ring is the same as that of the first sleeve assembly 12 with an inner gear ring.

[0085] Meanwhile, in the actual production process, the first reciprocating contact component 30 is an I-shaped wheel structure, and the surfaces that contact the first linkage disc 29 are all machined accordingly to ensure that force can be transmitted after contact and that the corresponding components in the equipment can be driven. For example, corresponding toothed structures are set on the contact surfaces to ensure that they can mesh with each other and ensure the stability of power transmission.

[0086] In this embodiment, the reversing mechanism includes a connecting shaft 15 rotatably sleeved on one side wall of the bearing housing 4. One end of the connecting shaft 15 is fixed with a second gear 27. The second gear 27 is located inside the second sleeve assembly 14 with an internal gear ring, and the second gear 27 meshes with the second sleeve assembly 14 with an internal gear ring.

[0087] The lower end of the second gear 27 meshes with the third gear 28;

[0088] When the first reciprocating contact 30 contacts the first linkage disc 29 located at the front end, it can drive the first gear 13 to rotate. The first gear 13 meshes with the gear ring inside the first sleeve assembly 12 with an internal gear ring, so that the first sleeve assembly 12 with an internal gear ring and the first gear 13 rotate in the same direction. When the first reciprocating contact 30 contacts the first linkage disc 29 located at the rear end, it can drive the third gear 28 to rotate. The third gear 28 can drive the second gear 27 to rotate, but the rotation direction of the second gear 27 is opposite to that of the third gear 28. This will cause the rotation direction of the second sleeve assembly 14 with an internal gear ring to be opposite to that of the third gear 28, that is, the rotation direction of the second sleeve assembly 14 with an internal gear ring is opposite to the rotation direction of the first sleeve assembly 12 with an internal gear ring.

[0089] In this embodiment, one end of the second reciprocating abutment 33 is fixed with an adaptation component 36, which is connected to one end of the bearing housing 4. The adaptation component 36 consists of a telescopic component and a spring component, which can adapt to the movement of the second reciprocating abutment 33 and at the same time facilitate the provision of a reset force to the second reciprocating abutment 33.

[0090] In this embodiment, the abutment mechanism includes a second swing rod 35 rotatably connected to one side of the second reciprocating abutment 33, a first swing rod 34 passing through the second reciprocating abutment 33, and a rotating connector 40 rotatably connected to both ends of the first swing rod 34. One of the rotating connectors 40 is slidably installed on one side wall inside the second reciprocating abutment 33. Both the second swing rod 35 and the other rotating connector 40 are provided with a pulling mechanism, and the pulling mechanism is provided with a first linkage plate 23 and a horizontal shaft 20.

[0091] One end of the first linkage plate 23 is rotatably connected to two oblique push rods 22. One end of the horizontal shaft 20 is fixed with a support plate 38. One end of the support plate 38 is rotatably sleeved with an abutment shaft 19. A movable abutment friction member 21 is slidably installed on the horizontal shaft 20. One end of the movable abutment friction member 21 corresponds to the abutment shaft 19. One end of each of the two oblique push rods 22 is rotatably connected to one side of the movable abutment friction member 21.

[0092] Both abutting shafts 19 are disposed between the first sleeve assembly 12 with internal toothed ring and the second sleeve assembly 14 with internal toothed ring, and the two abutting shafts 19 abut against the first sleeve assembly 12 with internal toothed ring and the second sleeve assembly 14 with internal toothed ring respectively.

[0093] In actual operation, the two abutting shafts 19 abut against the inner wall of the second sleeve assembly 14 with internal gear ring and the outer side of the first sleeve assembly 12 with internal gear ring, respectively. That is, when the first reciprocating abutting member 30 abuts against the first linkage plate 29 located at the front end, the second reciprocating abutting member 33 will also move to the left, which will drive the second swing rod member 35 to pull the second linkage plate 25 connected to the second swing rod member 35 to move. The abutting shaft 19 located on one side of the second swing rod member 35 abuts against the inner wall of the second sleeve assembly 14 with internal gear ring. When the second linkage plate 25 moves with the second swing rod member 35, the moving abutting friction member 21 abuts against the abutting shaft 19, so that the abutting shaft 19 stops rotating. At this time, the second sleeve assembly 14 with internal gear ring will stop rotating, which makes it easier for the first sleeve assembly 12 with internal gear ring to rotate.

[0094] Furthermore, since the first swing rod 34 is slidably mounted on the inner wall of the second reciprocating contact member 33 via the rotating connector 40, and the middle part of the first swing rod 34 rotates around one end of the U-shaped connecting shaft 39 via the U-shaped connecting shaft 39, and the U-shaped connecting shaft 39 is fixedly connected to the fixing member 26, this allows the first swing rod 34 to push the other second connecting plate 25 to move to the right when the second swing rod 35 pulls the second linkage plate 25 to move to the left, so that the other moving contact friction member 21 will not affect the rotation of the contact shaft 19;

[0095] In actual operation, the positional relationship between the contact shaft 19 and the moving contact friction element 21 is controlled to facilitate rapid contact.

[0096] In this embodiment, the pulling mechanism includes two fixing members 26, both of which are fixed to one side wall inside the bearing housing 4. A second linkage plate 25 is slidably mounted on each of the two fixing members 26, and two first linkage plates 23 are slidably mounted on the fixing members 26 respectively. A return spring assembly 24 is sleeved on the fixing member 26. The return spring assembly 24 is located between the first linkage plate 23 and the second linkage plate 25 on the same fixing member 26. The two ends of the return spring assembly 24 are respectively fixed to the opposite end of the same first linkage plate 23 and the second linkage plate 25.

[0097] The horizontal shaft 20 is slidably mounted on the fixed part 26. One end of the second rocker arm 35 is rotatably connected to one of the second linkage plates 25. Another rotating connecting part 40 is slidably mounted on another second linkage plate 25. A U-shaped connecting shaft 39 is fixed on another fixed part 26. One end of the U-shaped connecting shaft 39 is rotatably sleeved on the first rocker arm 34.

[0098] When the second linkage plate 25 is driven, it will apply an external force to the return spring assembly 24. The force received by the return spring assembly 24 will deform it and transmit it to the first linkage plate 23, enabling the first linkage plate 23 to move on the fixed member 26. The movement of the first linkage plate 23 can drive the moving abutment friction member 21 to move through the inclined push rod member 22, so as to control whether the moving abutment friction member 21 abuts against the abutment shaft 19.

[0099] In actual operation, when the second swing rod 35 moves to the left following the second reciprocating contact member 33, it causes the second linkage plate 25 connected to the second swing rod 35 to move to the left, squeezing the reset spring assembly 24 and causing the first linkage plate 23 to push the moving contact friction member 21 and the contact shaft 19 to abut through the inclined push rod 22, so that the second sleeve assembly 14 with internal gear ring cannot rotate. At this time, the first sleeve assembly 12 with internal gear ring can rotate. At the same time, the second reciprocating contact member 33 moves to the left, causing the first swing rod 34 to rotate, which can push the second linkage plate 25 corresponding to the first swing rod 34 to move to the right, so that the other contact shaft 19 can rotate, which facilitates the rotation of the first sleeve assembly 12 with internal gear ring.

[0100] In this invention, a plurality of grooves 37 are provided at equal intervals on the circumferential sidewall of the first sleeve assembly 12 with internal gear ring and the circumferential sidewall of the second sleeve assembly 14 with internal gear ring, and a plurality of synchronous shafts 18 are installed at equal intervals on the circumferential sidewall of the two abutting shafts 19.

[0101] One of the abutting shafts 19 has multiple synchronous shafts 18 that correspond to multiple grooves 37 on the inner wall of the second sleeve assembly 14 with an internal gear ring;

[0102] Multiple synchronous shafts 18 on another abutting shaft 19 correspond to multiple grooves 37 on the outer side of the first sleeve assembly 12 with internal gear ring;

[0103] By correspondingly setting the synchronous shaft 18 and the groove 37, it is possible to improve the ability of the second sleeve assembly 14 with internal gear ring or the first sleeve assembly 12 with internal gear ring to stop moving when the abutment shaft 19 is stationary.

[0104] The ratchet assembly 10 includes ratchet rings 1001, two ratchet rings 1001 are respectively fixed on the second sleeve assembly 14 with internal gear ring and the first sleeve assembly 12 with internal gear ring, and ratchet rods 1002 are rotatably connected to the control shaft 11. One end of each ratchet rod 1002 abuts against the inner wall of the two ratchet rings 1001, and a tension spring 1003 is fixed on one side of each ratchet rod 1002. The tension springs 1003 are all fixedly connected to the control shaft 11.

[0105] Two ratchet rings 1001 are located inside and outside the second sleeve assembly 14 with an internal toothed ring, respectively. The ratchet ring 1001 located inside the second sleeve assembly 14 with an internal toothed ring is fixedly connected to the first sleeve assembly 12 with an internal toothed ring, and the ratchet ring 1001 located outside the second sleeve assembly 14 with an internal toothed ring is fixedly connected to the second sleeve assembly 14 with an internal toothed ring.

[0106] The two ratchet rings 1001 and ratchet rods 1002 located inside and outside the second sleeve assembly 14 with internal toothed rings are arranged in opposite directions;

[0107] By reversing the arrangement of the ratchet ring 1001 and the ratchet lever 1002, it can be effectively made to rotate synchronously with the connected components. For example, when the first sleeve assembly 12 with an internal toothed ring can rotate while the second sleeve assembly 14 with an internal toothed ring cannot rotate, the ratchet ring 1001 fixed to the first sleeve assembly 12 with an internal toothed ring will abut against one end of the ratchet lever 1002, and the ratchet lever 1002 will push the control shaft 11 to rotate. At this time, the ratchet lever 1002 fixed to the second sleeve assembly 14 with an internal toothed ring can rotate within the ratchet ring 1001 fixed to the second sleeve assembly 14 with an internal toothed ring under the action of the control shaft 11.

[0108] Furthermore, the action of the tension spring 1003 enables one end of the ratchet lever 1002 to continuously fall onto the teeth inside the ratchet ring 1001; the ratchet ring 1001 has multiple teeth inside, adjacent teeth are connected to each other, and the shape of the teeth is a straight line connected to the center of the circle at one end and an arc connected to the inner wall of the ring at the other end. The ratchet lever 1002 is an arc-shaped lever, one end of which is connected to the control shaft 11, and the other end abuts against the teeth and can be inserted between two adjacent teeth.

[0109] In this invention, during actual operation, by controlling the rotation of different motor components 3, the input shaft 16 connected to them can be rotated. At the same time, by extending and retracting the hydraulic telescopic component 17, the shaft 11 can be controlled to output forces in different directions. That is, the motor component 3 does not need to frequently switch the input power supply, which helps to extend the service life of the motor component 3. This can be achieved through the operation of the hydraulic telescopic component 17.

[0110] The three support housings 4 are respectively set at different heights, which can facilitate connection with the corresponding components to effectively complete the rotation operation of the welding equipment; the rotation of the ratchet assembly 10 inside the support housing 4 connected to the mounting base 2 can cause the support housing 4 fixed to it to deflect around the axis of the ratchet assembly 10, thereby driving the overall orientation of the upper component to deflect.

[0111] The ratchet assembly 10 located in the middle bearing housing 4 can drive the first rotating arm 5 to deflect. It can cooperate with the ratchet assembly 10 located in the upper bearing housing 4 to drive the connecting assembly 6 to deflect, so as to effectively adjust the deflection angle and height of the second rotating arm 7. The second rotating arm 7 can drive the control assembly 8 to operate, so that the control assembly 8 can control the laser welding assembly 9. Through the above cooperation, the laser welding assembly 9 can be precisely aligned with the position to be welded.

[0112] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A rotary laser welding device, comprising a mounting base (2), characterized in that: The upper end of the mounting base (2) is provided with a rotating mechanism, and the rotating mechanism is provided with an adjustment component (8). One end of the adjustment component (8) is equipped with a laser welding component (9). The rotating mechanism is provided with three bearing housings (4), and a second sleeve assembly (14) with an internal gear ring is rotatably sleeved inside the three bearing housings (4). A control shaft (11) is provided through the second sleeve assembly (14) with an internal gear ring. The control shaft (11) is rotatably sleeved on the bearing housing (4). One end of the control shaft (11) located inside the second sleeve assembly (14) with an internal gear ring is rotatably sleeved with a first sleeve assembly (12) with an internal gear ring. Both the second sleeve assembly (14) with an internal gear ring and the first sleeve assembly (12) with an internal gear ring are equipped with ratchet assemblies (10). Both ratchet assemblies (10) are connected to the control shaft (11). An adjustment mechanism is installed on one end sidewall of the bearing housing (4), and the adjustment mechanism is provided with a first reciprocating contact (30) and a second reciprocating contact (33). An input shaft (16) is rotatably sleeved on one side wall inside the bearing housing (4). A second linkage disc (31) is fixed at one end of the input shaft (16). One end of the second linkage disc (31) extends into the second sleeve assembly (14) with an internal gear ring. Two first linkage discs (29) are rotatably sleeved on the second linkage disc (31). One end of one of the first linkage discs (29) is fixed with a first gear (13). One end of the first gear (13) extends into the first sleeve assembly (12) with an internal gear ring and meshes with the first sleeve assembly (12). One end of the other first linkage disc (29) is fixed with a third gear (28). The third gear (28) is provided with a reversing mechanism. The reversing mechanism is connected to the second sleeve assembly (14) with an internal gear ring. The input shaft (16) extends out of the bearing housing (4) and a motor assembly (3) is installed at one end, the motor assembly (3) being connected to the bearing housing (4); The first reciprocating contact (30) is sleeved on the second linkage plate (31), and the first reciprocating contact (30) is located between the two first linkage plates (29); The second reciprocating contact member (33) is provided with a contact mechanism, which corresponds to the first sleeve assembly (12) with an internal toothed ring and the second sleeve assembly (14) with an internal toothed ring. The abutting mechanism includes a second swing rod (35) rotatably connected to one side of the second reciprocating abutting member (33), a first swing rod (34) passing through the second reciprocating abutting member (33), and rotating connecting members (40) rotatably connected to both ends of the first swing rod (34). One of the rotating connecting members (40) is slidably installed on one end side wall inside the second reciprocating abutting member (33). Both the second swing rod (35) and the other rotating connecting member (40) are provided with a pulling mechanism. The pulling mechanism is provided with a first linkage plate (23) and a horizontal shaft (20). Two inclined push rods (22) are rotatably connected to one end of the first linkage plate (23). A support plate (38) is fixed to one end of the horizontal shaft (20). A contact shaft (19) is rotatably sleeved on one end of the support plate (38). A movable contact friction element (21) is slidably installed on the horizontal shaft (20). One end of the movable contact friction element (21) corresponds to the contact shaft (19). One end of each of the two inclined push rods (22) is rotatably connected to one side of the movable contact friction element (21). Both abutting shafts (19) are disposed between the first sleeve assembly (12) with internal toothed ring and the second sleeve assembly (14) with internal toothed ring, and the two abutting shafts (19) abut against the first sleeve assembly (12) with internal toothed ring and the second sleeve assembly (14) with internal toothed ring respectively. The pulling mechanism includes two fixing parts (26), both fixing parts (26) are fixed on one side wall inside the bearing housing (4), and a second linkage plate (25) is slidably installed on each of the two fixing parts (26). Two first linkage plates (23) are slidably installed on the fixing parts (26). A return spring assembly (24) is sleeved on the fixing parts (26). The return spring assembly (24) is located between the first linkage plate (23) and the second linkage plate (25) on the same fixing part (26). The two ends of the return spring assembly (24) are respectively fixed to the opposite end of the same first linkage plate (23) and the second linkage plate (25). The horizontal shaft (20) is slidably mounted on the fixing member (26), one end of the second swing rod (35) is rotatably connected to one of the second linkage plates (25), another rotating connecting member (40) is slidably mounted on another second linkage plate (25), and a U-shaped connecting shaft (39) is fixed on another fixing member (26), one end of the U-shaped connecting shaft (39) is rotatably sleeved on the first swing rod (34).

2. The rotary laser welding equipment according to claim 1, characterized in that: The rotating mechanism includes a second rotating arm (7) installed at the end of the control assembly (8) away from the laser welding assembly (9), and a connecting assembly (6) is installed at the end of the second rotating arm (7) away from the control assembly (8). The upper bearing housing (4) is connected to the connecting assembly (6). The first rotating arm (5) is installed on the ratchet assembly (10) inside the upper bearing housing (4). The other two bearing housings (4) are located at the lower end of the first rotating arm (5). The ratchet assembly (10) located in the middle bearing housing (4) is fixedly connected to the lower end of the first rotating arm (5); The lowermost support housing (4) is fixedly connected to the mounting base (2), and the ratchet assembly (10) inside the support housing (4) is fixedly connected to the support housing (4) in the middle.

3. The rotary laser welding equipment according to claim 2, characterized in that: The mounting base (2) is equipped with a support base (1) at its lower end.

4. The rotary laser welding equipment according to claim 1, characterized in that: The adjustment mechanism includes a hydraulic telescopic assembly (17) installed on one side wall inside the bearing housing (4). The piston rod of the hydraulic telescopic assembly (17) extends into the second sleeve assembly (14) with an internal gear ring. A connecting frame (32) is fixed to the end of the piston rod of the hydraulic telescopic assembly (17). The second reciprocating contact (33) is fixed to the lower end of the connecting frame (32). The first reciprocating contact (30) is rotatably sleeved on the upper end of the connecting frame (32).

5. The rotary laser welding equipment according to claim 1, characterized in that: The reversing mechanism includes a connecting shaft (15) rotatably sleeved on one side wall of the bearing housing (4), one end of the connecting shaft (15) is fixed with a second gear (27), the second gear (27) is located inside the second sleeve assembly (14) with an internal gear ring, and the second gear (27) meshes with the second sleeve assembly (14) with an internal gear ring. The lower end of the second gear (27) meshes with the third gear (28).

6. The rotary laser welding equipment according to claim 4, characterized in that: One end of the second reciprocating contact member (33) is fixed with an adaptation component (36), which is connected to one end of the bearing housing (4).

7. The rotary laser welding equipment according to claim 1, characterized in that: Multiple grooves (37) are provided at equal intervals on the one-circumference sidewall of the first sleeve assembly (12) with internal gear ring and the one-circumference sidewall of the second sleeve assembly (14) with internal gear ring. Multiple synchronous shafts (18) are installed at equal intervals on the one-circumference sidewall of the two abutting shafts (19). Multiple synchronous shafts (18) on one of the abutting shafts (19) correspond to multiple grooves (37) on the inner wall of the second sleeve assembly (14) with an internal gear ring; Multiple synchronous shafts (18) on another abutting shaft (19) correspond to multiple grooves (37) on the outside of the first sleeve assembly (12) with internal gear ring.

8. The rotary laser welding equipment according to claim 1, characterized in that: The ratchet assembly (10) includes ratchet rings (1001), two ratchet rings (1001) are respectively fixed on the second sleeve assembly (14) with internal gear ring and the first sleeve assembly (12) with internal gear ring, and ratchet rods (1002) are rotatably connected to the control shaft (11). One end of the two ratchet rods (1002) abuts against the inner wall of the two ratchet rings (1001), and a tension spring (1003) is fixed on one side of the ratchet rod (1002). The tension springs (1003) are all fixedly connected to the control shaft (11). Two ratchet rings (1001) are located inside and outside the second sleeve assembly (14) with an internal toothed ring, respectively. The ratchet ring (1001) inside the second sleeve assembly (14) with an internal toothed ring is fixedly connected to the first sleeve assembly (12) with an internal toothed ring, and the ratchet ring (1001) outside the second sleeve assembly (14) with an internal toothed ring is fixedly connected to the second sleeve assembly (14) with an internal toothed ring. The two ratchet rings (1001) and ratchet rods (1002) located inside and outside the sleeve assembly (14) with the second internal toothed ring are arranged in opposite directions.

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