Electric strut reduction gearbox

Abstract

The utility model provides an electric strut reduction box, wherein the outer cylinder is fixedly connected to the base, a primary reducer and a secondary reducer are installed in the outer cylinder, a secondary internal tooth is arranged in the outer cylinder, a fixing piece is arranged inside the outer cylinder, a first bayonet and a second bayonet are arranged in the base, the primary reducer comprises a primary planet carrier, a primary planetary wheel and an inner gear ring, a third bayonet is arranged on the outer wall of the inner gear ring, a clamping block is extended from the inner gear ring, the primary planet carrier is mounted with a primary planetary wheel through a primary shaft, the primary planetary wheel is meshed and connected with the inner gear ring, the secondary reducer comprises an output spline, a secondary planetary wheel and a copper cup, and the output spline is mounted with the secondary planetary wheel through the secondary shaft. The utility model uses the clamping block to cooperate with the first bayonet to offset the counter torque between the primary reducer and the base, and then uses the second bayonet, the third bayonet and the matching fixing piece to improve the connection firmness of the primary reducer, the base and the outer cylinder, protect the structure at the connection between the outer cylinder and the base, and improve the service life of the electric strut reduction box.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric struts, and in particular relates to an electric strut reduction box. Background Art

[0002] Most electric strut reducers are composed of two-stage planetary gears connected in series. The input end of the first-stage planetary gear is connected to the motor, and the output end is connected to the input end of the second-stage planetary gear. The output end of the second-stage planetary gear is the output end of the reducer. Most existing electric strut reducers are provided with internal teeth in the outer cylinder, that is, the outer cylinder serves as the outer gear ring of the planetary gear, and the outer cylinder is connected to the motor through the base. Therefore, when the reducer is running, the outer cylinder and the base have circumferential forces in different directions, that is, counter-torque, which makes the connection between the outer cylinder and the base easy to be damaged, resulting in a shortened service life of the electric strut reducer.

[0003] Authorization announcement number CN217502549U discloses a gearbox device for automobiles, including a housing 9, an end cover 1, a first-stage reduction mechanism and a second-stage reduction mechanism, wherein the first-stage reduction mechanism includes an input gear, a first planetary carrier 4, a first planetary wheel 3 disposed on the first planetary carrier 4 and meshing with the input gear, and a first internal tooth 9.2.2 disposed on the housing 9 and meshing with the first planetary wheel 3, wherein the first planetary wheel 3 is located inside the first internal tooth 9.2.2. The second-stage reduction mechanism includes a second sun gear 4.1, a second planetary carrier 7, a second planetary wheel 6 disposed on the second planetary carrier 7 and meshing with the second sun gear 4.1, and a second internal tooth 9.2.3 disposed on the housing 9 and meshing with the second planetary wheel 6, wherein the second planetary wheel 6 is located inside the second internal tooth 9.2.3, and the second sun gear 4.1 is integrated with the first planetary carrier 4, i.e., the output end of the first-stage reduction mechanism serves as the input end of the second-stage reduction mechanism. When the reduction gearbox is running, the outer cylinder 9 and the end cover 1 (base) have axial forces in different directions, which makes the connection between the outer cylinder and the base easy to be damaged.

[0004] Authorization announcement number CN219795980U discloses a back door support rod plastic gearbox, including a housing 1, the outer periphery of the housing 1 is wrapped with a shock-absorbing cushion 305, the inner wall of the housing forms a tooth portion 4, and the housing 1 is provided with a reduction mechanism 6 connected to a motor or a support rod; the reduction mechanism 6 has at least a first-stage planetary reduction mechanism 2, the first-stage planetary reduction mechanism 2 includes an integrated shaft frame 101, a first-stage planetary wheel 102 and a planetary frame 103, the first-stage planetary wheel 102 is rotated on the planetary frame 103 through the integrated shaft frame 101, the integrated shaft frame 101 is embedded in the planetary frame 103, and the outer periphery of the first-stage planetary wheel 102 is meshed with the tooth portion 4, the first-stage planetary wheel 102 is provided with a first input portion 105 into which the output shaft of the power supply machine is placed, and the planetary frame 103 is provided with a first output portion 104 connected to the support rod or the second-stage planetary reduction mechanism 3. When the reduction box is running, the housing 1 (outer cylinder) and the base 5 have axial forces in different directions, which makes the connection between the outer cylinder and the base easy to be damaged. Utility Model Content

[0005] The purpose of the utility model is to provide an electric strut reduction box to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an electric strut reduction box, comprising an outer cylinder, which is fixedly connected to a base, a primary reducer and a secondary reducer are installed in the outer cylinder, a secondary internal tooth is provided in the outer cylinder, a fixing part is provided inside the outer cylinder, and a first bayonet and a second bayonet are provided in the base. The primary reducer comprises a primary planetary carrier, a primary planetary wheel and an inner gear ring, an outer side wall of the inner gear ring is provided with a third bayonet, and a block is extended from the inner gear ring. The primary planetary carrier is provided with a primary planetary wheel through a primary shaft, and the primary planetary wheel is meshed with the inner gear ring. The secondary reducer comprises an output spline, a secondary planetary wheel and a copper cup, the output spline is provided with a spline shaft, and the secondary internal tooth is meshed with the secondary planetary wheel.

[0007] Preferably, a clamping groove is provided at the end of the spline shaft, and a clamping spring is clamped in the clamping groove.

[0008] Preferably, the outer side wall of the copper cup is provided with a retaining rib.

[0009] Preferably, the clamping block is the same in shape and size as the first clamping port, and the clamping block clamps and fixes the first clamping port.

[0010] Preferably, the second bayonet holes and the third bayonet holes are the same in number and have corresponding positions.

[0011] Preferably, the base is provided with an assembly hole.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The base of the utility model is provided with a first bayonet and a second bayonet, the outer side wall of the inner gear ring of the first-stage reducer is provided with a third bayonet, and the inner gear ring is extended to be provided with a clamping block, and the inner wall of the outer cylinder is provided with a fixing piece. During assembly, the second-stage reducer is first installed inside the outer cylinder, and then the first-stage reducer is installed inside the outer cylinder. At this time, the third bayonet is clamped with the fixing piece to fix the outer cylinder and the first-stage reducer, and finally the base is installed on the outer cylinder. At this time, the second bayonet is clamped with the fixing piece to fix the outer cylinder and the base, and the clamping block is inserted and fixed in the first bayonet, so that the first-stage reducer is fixed to the base, and the motor is installed at the bottom of the base through the assembly hole. The utility model cooperates with the clamping block and the first bayonet to offset the counter torque between the first-stage reducer and the base, and then improves the connection firmness of the first-stage reducer, the base and the outer cylinder through the second bayonet, the third bayonet and the matching fixing piece, protects the connection between the outer cylinder and the base from damage, and improves the service life of the electric strut reducer. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the first exploded structural view of the utility model.

[0015] Figure 2 This is the second exploded structural view of the utility model.

[0016] Figure 3 It is an exploded structural view of the primary reducer of the utility model.

[0017] Figure 4 It is a view of the internal structure of the outer cylinder of the utility model.

[0018] Figure 5 It is a structural view of the inner gear ring of the utility model.

[0019] Figure 6 It is a structural view of the base of the utility model.

[0020] Figure 7 It is a structural view of the two-stage reducer of the utility model.

[0021] Figure 8 It is a structural view of the copper cup of the utility model.

[0022] Markings in the figure: outer cylinder 1, base 2, primary reducer 3, secondary reducer 4, secondary internal teeth 5, fixing piece 6, first bayonet 7, second bayonet 8, primary planet carrier 9, primary planetary gear 10, internal gear ring 11, third bayonet 12, block 13, primary shaft 14, output spline 15, secondary planetary gear 16, copper cup 17, secondary shaft 18, spline shaft 19, slot 20, retaining spring 21, retaining rib 22, assembly hole 23. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Embodiment 1:

[0025] like Figure 1-Figure 8 As shown, the utility model provides an electric strut reduction gearbox, including an outer cylinder 1, the outer cylinder 1 is fixedly connected to the base 2, a primary reducer 3 and a secondary reducer 4 are installed in the outer cylinder 1, a secondary internal tooth 5 is provided in the outer cylinder 1, a fixing member 6 is provided inside the outer cylinder 1, and the base 2 is provided with a first bayonet 7 and a second bayonet 8. The primary reducer 3 includes a primary planet carrier 9, a primary planetary wheel 10 and an inner gear ring 11, the outer wall of the inner gear ring 11 is provided with a third bayonet 12, and the inner gear ring 11 is extended with a clamping block 13, the primary planet carrier 9 is provided with a primary planetary wheel 10 through a primary shaft 14, and the primary planetary wheel 10 is meshed with the inner gear ring 11, and the secondary reducer 4 includes an output spline 15, a secondary planetary wheel 16 and a copper cup 17, the output spline 15 is provided with a secondary planetary wheel 16 through a secondary shaft 18, the output spline 15 is provided with a spline shaft 19, and the secondary internal tooth 5 is meshed with the secondary planetary wheel 16. A clamping groove 20 is provided at the end of the spline shaft 19, and a clamping spring 21 is clamped in the clamping groove 20. The outer wall of the copper cup 17 is provided with a clamping rib 22. The clamping block 13 is the same shape and size as the first clamping port 7, and the clamping block 13 clamps and fixes the first clamping port 7. The second clamping port 8 is the same in number and position as the third clamping port 12. The base 2 is provided with an assembly hole 23.

[0026] Through the above technical solution, the base 2 of the utility model is provided with a first bayonet 7 and a second bayonet 8, the outer side wall of the inner gear ring 11 of the primary reducer 3 is provided with a third bayonet 12, and the inner gear ring 11 is extended with a clamping block 13, and the inner wall of the outer cylinder 1 is provided with a fixing piece 6. During assembly, the secondary reducer 4 is first installed inside the outer cylinder 1, and then the primary reducer 3 is installed inside the outer cylinder 1. At this time, the third bayonet 12 is clamped with the fixing piece 6 to fix the outer cylinder 1 and the primary reducer 3. Finally, the base 2 is installed on the outer cylinder 1. At this time, the second bayonet 8 is clamped with the fixing piece 6. The fixing piece 6 fixes the outer cylinder 1 and the base 2, and the clamping block 13 is inserted and fixed on the first bayonet 7 to fix the primary reducer 3 and the base 2. The motor is installed at the bottom of the base 2 through the assembly hole 23. The utility model cooperates with the first bayonet 7 through the clamping block 13 to offset the counter torque between the primary reducer 3 and the base 2, and then improves the connection firmness of the primary reducer 3, the base 2 and the outer cylinder 1 through the second bayonet 8, the third bayonet 12 and the matching fixing piece 6, protects the connection between the outer cylinder 1 and the base 2 from damage, and improves the service life of the electric strut reducer box.

[0027] Embodiment 2:

[0028] like Figure 1-Figure 8 As shown, the outer cylinder 1 of the utility model is fixedly connected to the base 2, and the entire electric strut reducer is wrapped by an outer cylinder 1, whose main function is to provide a stable installation support and protect the internal components. The bottom of the base 2 is fixedly installed with a driving motor. The outer cylinder 1 is equipped with a primary reducer 3 and a secondary reducer 4. The primary reducer 3 and the secondary reducer 4 are the core components of the reduction function. The primary reducer 3 and the secondary reducer 4 work in coordination, and through multi-stage reduction, a larger reduction ratio is achieved to ensure that the final output torque can meet the torque requirements of the electric strut. The outer cylinder 1 is provided with a secondary internal tooth 5, which is meshed with the planetary gear of the secondary reducer 4. A fixing part 6 is provided inside the outer cylinder 1, and a first bayonet 7 and a second bayonet 8 are provided on the base 2. The fixing part 6 fixes the outer cylinder 1 to the base 2 and the first-stage reducer 3. Specifically, the inner gear ring 11 of the first-stage reducer 3 is provided with a third bayonet 12, and the third bayonet 12 is fixed with the fixing part 6. The length of the fixing part 6 is greater than that of the third bayonet 12. Therefore, the second bayonet 8 on the base 2 can continue to be clamped and fixed on the fixing part 6. The fixing part 6 can fix the base 2 and the first-stage reducer 3 to prevent the rotation between the outer cylinder 1 and the base 2 and the outer cylinder 1 and the first-stage reducer 3. The primary reducer 3 includes a primary planet carrier 9, a primary planetary gear 10 and an inner gear ring 11. The outer wall of the inner gear ring 11 is provided with a third bayonet 12. The third bayonet 12 is connected to the fixing member 6 to fix the inner gear ring 11 inside the outer cylinder 1. The inner gear ring 11 is extended with a clamping block 13. The clamping block 13 further enhances the structural stability of the reduction box. When the motor is running, the inner gear ring 11 is not directly fixedly connected to the motor, and the inner gear ring 11 will generate a counter torque, which is due to the torque reaction generated by the meshing of the gears. Through the cooperation of the first bayonet 7 and the clamping block 13, the inner gear ring 11 and the base 2 form a component of a stable structure, offsetting the counter torque between the inner gear ring 11 and the base 2. The clamping block 13 of the inner gear ring 11 is connected to the base 2 to offset the counter torque, reduce the counter torque acting on the outer cylinder 1, protect the connection between the outer cylinder 1 and the base 2 from damage, and improve the service life of the electric strut reduction box. The primary planet carrier 9 is mounted with the primary planetary gear 10 through the primary shaft 14, and the primary planetary gear 10 is meshed with the inner gear ring 11. The secondary reducer 4 includes an output spline 15, a secondary planetary gear 16 and a copper cup 17. The copper cup 17 reduces the friction between the output spline 15 and the outer cylinder 1, thereby improving the mechanical efficiency and durability of the entire reduction box. The output spline 15 is mounted with the secondary planetary gear 16 through the secondary shaft 18, and the output spline 15 is provided with a spline shaft 19. The secondary internal gear 5 is meshed with the secondary planetary gear 16.

[0029] The spline shaft 19 of the utility model is movably installed in the outer cylinder 1 through the cooperation of the card slot 20 and the retaining spring 21. Specifically, after the retaining spring 21 is embedded in the card slot 20, the spline shaft 19 can still rotate freely inside the outer cylinder 1, but the axial movement is restricted. Through the connection between the card slot 20 and the retaining spring 21, the spline shaft 19 can be easily installed in the outer cylinder 1. The operator only needs to insert the retaining spring 21 into the card slot 20 to complete the installation of the spline shaft 19, which greatly simplifies the assembly process and saves time and labor costs. The retaining spring 21 is clamped in the card slot 20, which can effectively fix the position of the spline shaft 19, prevent it from axial displacement or falling off during operation, and prevent external loads from affecting the stability of the internal gears. This not only improves the structural stability of the reduction box, but also ensures the operational safety of the entire system. When maintenance is required, the maintenance personnel only need to remove the retaining spring 21 to easily remove the spline shaft 19 from the outer cylinder 1. By providing a slot 20 at the end of the spline shaft 19 and using a retaining spring 21 to movably install the spline shaft 19 in the outer cylinder 1, this optimized design significantly improves the assembly convenience, structural stability, maintenance convenience and operational reliability of the electric strut reducer.

[0030] In order to further improve the performance of the reduction box, the utility model optimizes the design of the outer wall of the copper cup 17, and sets a clamp 22 on the outer wall. The outer tube is made of plastic material, and the function of the clamp 22 is that after the copper cup is pressed into the outer tube, the clamp 22 will be embedded in the side wall of the outer tube, so that the copper cup is firmly connected with the outer tube, and the outer wall of the copper cup is tightly fitted with the inner wall of the outer tube to prevent the lubricating oil from overflowing and affecting other parts at the load end.

[0031] The block of the utility model has the same shape and size as the first bayonet, and the block is clamped and fixed to the first bayonet, so as to ensure that the two can be closely fitted and fixed, prevent loosening, and improve the stability of the reduction box under various working conditions. Specifically, the block is a part extending from the outer periphery of the inner gear ring, and the first bayonet is a groove set on the base. This design not only provides more support in structure, but also ensures that the two can be seamlessly connected during assembly, thereby improving the stability and safety of the equipment. The block and the first bayonet have the same shape and size, so that they can achieve precise docking and close fit. This design can effectively prevent loosening caused by vibration or other external forces during operation, thereby ensuring the stability of the reduction box under high load. Close fit can also avoid transmission errors caused by loosening and improve the operating accuracy of the equipment. The matching design of the block and the first bayonet makes the installation process simpler and faster. The assembler only needs to align the block with the first bayonet and clamp it to complete the fixation. This greatly simplifies the assembly steps and improves production efficiency. At the same time, it also reduces human errors in assembly, ensuring that each reduction box can achieve the expected assembly effect. The additional mechanical fixing force generated by the close fit between the clamping block and the first clamping opening further strengthens the connection between the inner gear ring and the base.

[0032] The second bayonet 8 and the third bayonet 12 of the utility model are the same in number and in corresponding positions, so that the second bayonet 8 and the third bayonet 12 can be plugged into the fixing member 6 of the outer cylinder 1. The second bayonet 8 is located on the base 2, and the third bayonet 12 is located on the outer side wall of the inner gear ring 11. The corresponding second bayonet 8 and the third bayonet 12 are plugged and installed on a fixing member 6, which can reduce the number of fixing members 6 inside the outer cylinder 1, optimize the structure of the outer cylinder 1, and at the same time, facilitate the determination of the installation direction of the base 2 and the inner gear ring 11.

[0033] The utility model is provided with assembly holes 23 on the base 2, and these assembly holes 23 are used to install the drive motor, and the drive motor is firmly fixed on the base 2 by bolts. By directly fixing the drive motor in the assembly holes 23 on the base 2, looseness and vibration caused by unstable connection can be effectively avoided. This not only improves the overall connection strength between the reduction box and the motor, but also reduces the noise and vibration during operation, and improves the operation stability and reliability of the equipment. The preset assembly holes 23 make the installation process of the drive motor simple and quick. The operator only needs to align the motor according to the hole position and use bolts to fix it to complete the assembly. This design avoids the complicated bracket installation and debugging process, greatly reducing the assembly time and labor cost. When the equipment needs to be maintained and repaired, the disassembly of the drive motor also becomes more convenient. There is no need to disassemble the cumbersome brackets and connectors, and the motor can be removed by loosening the bolts, which saves maintenance time and improves the maintainability and maintenance efficiency of the equipment. By presetting the assembly holes 23 on the base 2, this design improves the standardization level of the connection between the reduction box and the drive motor. During the production process, the consistency and interchangeability of the equipment can be ensured by simply processing and assembling according to the preset standards, which improves the overall production efficiency and quality control level. The drive motor is directly fixed on the base 2 of the reduction box, avoiding the use of additional brackets, making the entire transmission system more compact and unified. This not only improves the aesthetics of the equipment, but also reduces the extra weight and volume caused by the external bracket, and improves the space utilization of the equipment.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0035] The above description is only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. An electric strut reduction gearbox, comprising an outer cylinder, the outer cylinder is fixedly connected to a base, a primary reducer and a secondary reducer are installed in the outer cylinder, and a secondary internal gear is arranged in the outer cylinder, characterized in that: A fixing piece is provided inside the outer cylinder, a first bayonet and a second bayonet are provided on the base, the primary reducer comprises a primary planetary carrier, a primary planetary gear and an inner gear ring, the outer side wall of the inner gear ring is provided with a third bayonet, a block is extended from the inner gear ring, the primary planetary carrier is provided with a primary planetary gear through a primary shaft, the primary planetary gear is meshed with the inner gear ring, the secondary reducer comprises an output spline, a secondary planetary gear and a copper cup, the output spline is provided with a secondary planetary gear through a secondary shaft, the output spline is provided with a spline shaft, and the secondary internal teeth are meshed with the secondary planetary gear.

2. The electric strut reduction gearbox according to claim 1, characterized in that: A clamping groove is provided at the end of the spline shaft, and a clamping spring is clamped in the clamping groove.

3. The electric strut reduction gearbox according to claim 1, characterized in that: The outer side wall of the copper cup is provided with a clamping rib.

4. The electric strut reduction gearbox according to claim 1, characterized in that: The clamping block has the same shape and size as the first clamping port, and the clamping block is clamped and fixed to the first clamping port.

5. The electric strut reduction gearbox according to claim 1, characterized in that: The second bayonet holes and the third bayonet holes are the same in number and have corresponding positions.

6. The electric strut reduction gearbox according to claim 1, characterized in that: The base is provided with a mounting hole.

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