Electric open spanner

Abstract

The invention provides an electric open spanner. The electric open spanner comprises a shell, an input gear, a transition gear and an output gear, wherein the input gear, the transition gear and the output gear are rotationally arranged in the shell. A connecting through hole is formed in one end of the shell in a penetrating mode, the radial side of the connecting through hole penetrates through the shell to form a receding opening, the output gear is rotationally connected into the connecting through hole, a working through hole corresponding to the connecting through hole is formed in the output gear in a penetrating mode, and the radial side of the working through hole penetrates through the output gear to form a working opening. A rolling assembly used for being in rolling fit with the output gear is embedded in the shell. The at least two transition gears are in transmission connection with different sides of the output gear at the same time. The two transition gears are in transmission connection with the different sides of the output gear, so that the output gear with the working opening can be driven to continuously rotate, and meanwhile, the rolling assembly is embedded in the shell, so that the overall height of the output gear can be greatly reduced; therefore, the device can flexibly and conveniently work in a narrow, crowded or complex-structure working environment.

Description

Technical Field

[0001] This invention relates to the field of electric wrenches, and more particularly to an electric open-end wrench. Background Technology

[0002] Electric wrenches, as core power tools in modern assembly, maintenance, and construction engineering, are widely used in many fields such as automobile manufacturing, wind power generation, steel structure installation, and pipeline engineering. They convert electrical energy into rotational torque through an electric motor, greatly improving the efficiency of bolt installation and removal and reducing the labor intensity of operators. However, existing electric wrenches require a large bearing at the wrench head, resulting in a bulky wrench head. This makes them prone to interference with surrounding equipment or workpieces in narrow, crowded, or structurally complex working environments, leading to poor operational flexibility, spatial adaptability, and ease of use.

[0003] Therefore, there is a need to provide an electric open-end wrench to solve the above-mentioned technical problems. Summary of the Invention

[0004] This invention provides an electric open-end wrench to solve the problems of existing electric open-end wrenches being too large, easily interfering with surrounding equipment or workpieces in narrow, crowded, or complex working environments, and having poor operational flexibility, spatial adaptability, and ease of operation.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is: an electric open-end wrench, which includes a housing and an input gear, a transition gear and an output gear rotatably disposed within the housing; One end of the housing is provided with a connecting through hole, and the radial side of the connecting through hole passes through the housing to form a clearance opening. The output gear is rotatably connected in the connecting through hole. The output gear is provided with a working through hole corresponding to the connecting through hole. The radial side of the working through hole passes through the output gear to form a working opening. A rolling component for rolling cooperation with the output gear is embedded in the housing. At least one end of the input gear passes through the housing, the transition gear is driven between the input gear and the output gear, at least two transition gears are simultaneously driven on different sides of the output gear, and the distance between the meshing positions of the output gear and the two transition gears is greater than the width of the working opening.

[0006] In this invention, the housing includes a bottom shell and a top cover. The outer surfaces of the bottom shell and the top cover are provided with a plurality of mounting through holes in a ring shape corresponding to the position of the output gear. The mounting through holes are used to mount the rolling assembly, which includes balls and limiting members. The ball is disposed in the mounting through hole. The diameter of the mounting through hole at the end near the output gear is smaller than the outer diameter of the ball. The ball passes through the mounting through hole and contacts the output gear. The diameter of the mounting through hole at the end away from the output gear is greater than or equal to the outer diameter of the ball. The limiting member is disposed in the mounting through hole at the end away from the output gear. The limiting member is used to restrict the ball within the mounting through hole.

[0007] The limiting member includes a cylindrical part and a spring part. The cylindrical part is a through cylindrical structure. One end of the multiple spring parts is connected to the end of the cylindrical part, and the other end of the multiple spring parts extends into the inner side of the cylindrical part. The spring parts are used to contact the ball.

[0008] Furthermore, the cylindrical body includes a bent portion that bends inward, and a plurality of spring pieces are connected to the bent portion. The plurality of spring pieces, the bent portion, and the cylindrical body are integrally formed.

[0009] An annular raised step is provided on the inner wall of the mounting through hole at the end away from the output gear. The outer diameter of the cylindrical part is larger than the inner diameter of the raised step. The raised step engages the limiting member in the mounting through hole. An end cap is connected to the end of the cylindrical body away from the spring piece. The end cap includes an outer cap portion and an inner cap portion. The outer cap portion is interference-fitted into the stepped portion, and the inner cap portion is fitted into the cylindrical body. The outer diameter of the inner cap portion plus the wall thickness of the cylindrical body is greater than the inner diameter of the stepped portion. In addition, both sides of the output gear are provided with annular raceway grooves, and multiple balls are fitted into the raceway grooves.

[0010] In this invention, the electric open-end wrench further includes a rotary positioning mechanism, which is disposed on one side of the input gear and includes a mounting shaft, a locking block, and an elastic element. The locking block is rotatably connected to the housing via the mounting shaft. One end of the elastic element is connected to the housing, and the other end of the elastic element is connected to the locking block. The elastic element is used to drive the locking block to maintain contact with the circumferential side of the input gear. The input gear has a slot on its circumferential side surface corresponding to the card block. Along the circumferential direction of the input gear, one end of the inner bottom surface of the slot is connected to the circumferential side surface of the input gear, and the other end of the inner bottom surface of the slot is at a set distance from the circumferential side surface of the input gear to form a locking surface. When the locking block contacts the locking surface, the working opening and the clearance opening are aligned, and the input gear can only rotate in the direction that moves the locking surface away from the locking block.

[0011] The elastic element is a torsion spring, which is sleeved on the mounting shaft. A nut is threaded onto the mounting shaft, and the torsion spring is positioned between the nut and the locking block.

[0012] In this invention, a fixed column is provided inside the housing, and each transition gear is rotatably connected to the fixed column through two bearings. A retaining ring is provided on the inner side of the transition gear, one bearing is limited between the retaining ring and the bottom shell, and the other bearing is limited between the retaining ring and the top cover.

[0013] In this invention, two sets of symmetrically arranged transition gear sets are connected between the input gear and the output gear. Each set of transition gear sets includes two transition gears that are connected to each other and have a transmission ratio of 1:1. The two ends of the input gear are rotatably connected to the housing via bearings, and the height of the area of ​​the housing corresponding to the input gear is greater than the height of the area of ​​the housing corresponding to the transition gear and the output gear. The housing includes a bottom shell and a top cover. The inner walls of the housing and the top cover are provided with protrusions in the areas corresponding to the input gear and the transition gear, the areas corresponding to the transition gear and the output gear, and the areas corresponding to the transition gear and the output gear. The bottom shell and the top cover are fastened together by screws, and the screws are connected to the positions of the protrusions.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the electric open-end wrench of the present invention drives the output gear with the working opening to rotate continuously by connecting two transition gears on different sides of the output gear. At the same time, by embedding a rolling component in the housing, the overall height of the output gear can be greatly reduced, so that it can work flexibly and conveniently in narrow, crowded or complex working environments. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments are briefly introduced below. The drawings described below are only the corresponding drawings of some embodiments of the present invention.

[0016] Figure 1 This is a schematic diagram of a preferred embodiment of the electric open-end wrench of the present invention.

[0017] Figure 2 This is an exploded structural diagram of the electric open-end wrench of the present invention.

[0018] Figure 3 This is a cross-sectional view of the electric open-end wrench of the present invention.

[0019] Figure 4 for Figure 3 A magnified view of the local structure of the scrolling component.

[0020] Figure 5 This is a schematic diagram of the structure of the rolling component in this invention.

[0021] Figure 6 This is a schematic diagram of the rotary positioning mechanism in this invention.

[0022] Figure 7 This is a schematic diagram of the connection structure between the transition gear and the fixed column in this invention. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] The directional terms mentioned in this invention, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", "top" and "bottom", are only for reference to the orientation of the accompanying drawings. The directional terms used are for the purpose of explaining and understanding this invention, and are not intended to limit this invention.

[0025] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, a connection can be a detachable connection or a connection of an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components or an interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] Existing electric open-end wrenches require a large bearing at the wrench head, resulting in a bulky wrench head. This makes them prone to interference with surrounding equipment or workpieces in narrow, crowded, or complex working environments, leading to poor operational flexibility, spatial adaptability, and ease of use. Furthermore, many existing electric open-end wrenches lack the function of rotating back to the initial position, making operation inconvenient and resulting in a poor user experience.

[0027] The following is a preferred embodiment of an electric open-end wrench provided by the present invention that can solve the above-mentioned technical problems.

[0028] Please refer to Figure 1 , Figure 2 and Figure 3 In the diagram, units with similar structures are represented by the same labels.

[0029] This embodiment provides an electric open-end wrench, which includes a housing 11 and an input gear 12, a transition gear 14 and an output gear 13 rotatably disposed within the housing 11.

[0030] A connecting through hole 112 is provided through one end of the housing 11. A radial side of the connecting through hole 112 penetrates the housing 11 to form a clearance opening 111. An output gear 13 is rotatably connected within the connecting through hole 112. A working through hole 131 is provided on the output gear 13 corresponding to the connecting through hole 112. A working opening 132 is formed by the radial side of the working through hole 131 penetrating the output gear 13, facilitating engagement with screws, nuts, or other workpieces to be tightened or loosened. The inner wall shape of the working through hole 131 is adapted to the outer circumferential shape of the screw or nut to be tightened.

[0031] Among them, a rolling assembly 15 is embedded in the housing 11 for rolling engagement with the output gear 13, which can reduce the overall thickness of the output gear 13 area.

[0032] The input gear 12 has at least one end penetrating the housing 11 for connection to a power unit (e.g., an electric motor). Transition gears 14 are driven between the input gear 12 and the output gear 13. At least two transition gears 14 are simultaneously driven on different sides of the output gear 13. The distance between the meshing positions of the output gear 13 and the two transition gears 14 is greater than the width of the working opening 132, i.e., the width is... Figure 1 The W in the middle ensures that during the rotation of the output gear 13, the transition gear 14 always remains engaged with the output gear 13, achieving continuous and stable torque transmission, and preventing the transmission between the transition gear 14 and the output gear 13 from being interrupted due to the presence of the working opening 132.

[0033] Please refer to Figures 2-5 In this embodiment, the housing 11 includes a bottom shell 113 and a top cover 114. The outer surfaces of the bottom shell 113 and the top cover 114 are provided with a plurality of mounting through holes 115 in a ring shape corresponding to the position of the output gear 13. The mounting through holes 115 are used to install the rolling assembly 15. The rolling assembly 15 includes a ball 151 and a limiting member 152.

[0034] A ball bearing 151 is disposed within a mounting through hole 115. The diameter of the end of the mounting through hole 115 closest to the output gear 13 is smaller than the outer diameter of the ball bearing 151. The ball bearing 151 passes through the mounting through hole 115 and contacts the output gear 13, and the ball bearing 151 within the mounting through hole 115 will not dislodge towards the output gear 13. The diameter of the end of the mounting through hole 115 furthest from the output gear 13 is greater than or equal to the outer diameter of the ball bearing 151, so that the ball bearing 151 can be fitted into the mounting through hole 115. A limiting member 152 is provided at the end of the mounting through hole 115 furthest from the output gear 13, and the limiting member 152 is used to confine the ball bearing 151 within the mounting through hole 115.

[0035] Please refer to Figure 4 and Figure 5 The limiting member 152 includes a cylindrical part 1521 and a spring part 1522. The cylindrical part 1521 is a through cylindrical structure. One end of the multiple spring parts 1522 is connected to the end of the cylindrical part 1521, and the other end of the multiple spring parts 1522 extends into the inner side of the cylindrical part 1521. The spring parts 1522 are used to contact the ball 151.

[0036] Furthermore, the cylindrical body 1521 includes a bent portion 1523 that bends inward, and multiple spring pieces 1522 are connected to the bent portion 1523. The multiple spring pieces 1522, the bent portion 1523, and the cylindrical body 1521 are integrally formed, and the limiting member 152 has a high overall elastic deformation capability.

[0037] An annular raised step 1151 is provided on the inner wall of the mounting through hole 115 at the end away from the output gear 13. The outer diameter of the cylindrical body 1521 is larger than the inner diameter of the raised step 1151. The raised step 1151 engages the limiting member 152 within the mounting through hole 115. It should be noted that the cylindrical body 1521 can undergo a certain elastic deformation after being pressed against the raised step 1151, so that the cylindrical body 1521 can pass through the raised step 1151 and be installed into the interior of the mounting through hole 115.

[0038] More specifically, an end cap 153 is connected to the end of the cylindrical body 1521 away from the spring piece 1522. The end cap 153 includes an outer cap body 1531 and an inner cap body 1532. The outer cap body 1531 is interference-fitted into the stepped portion 1151, and the inner cap body 1532 is fitted into the cylindrical body 1521. The outer diameter of the inner cap body 1532 plus the wall thickness of the cylindrical body 1521 is greater than the inner diameter of the stepped portion 1151.

[0039] When the inner cover portion 1532 is fitted inside the cylindrical portion 1521, the inner cover portion 1532 provides support to the cylindrical portion 1521 from the inside. Even if the cylindrical portion 1521 is squeezed, it cannot deform inward, and the outer diameter of the cylindrical portion 1521 will not shrink to a size smaller than the inner diameter of the raised step portion 1151. This allows the limiting member 152 and the ball bearing 151 to be stably installed in the mounting through hole 115.

[0040] When the rolling assembly 15 is installed in the mounting through hole 115, the outer surface of the end cap 153 is flush with the outer surface of the housing 11, which makes it easier for the electric open-end wrench to work. The end cap 153 will not interfere with the surrounding equipment or workpiece, and the appearance is also more beautiful.

[0041] In addition, both sides of the output gear 13 are provided with annular raceway grooves, and multiple balls 151 are fitted into the raceway grooves. This makes the balls 151 and the output gear 13 form a more stable rolling fit, and at the same time, it can further reduce the axial space occupied.

[0042] Please refer to Figure 2 and Figure 6 In this embodiment, the electric open-end wrench also includes a rotary positioning mechanism 16, which is disposed on one side of the input gear 12. The rotary positioning mechanism 16 includes a mounting shaft 161, a locking block 162, and an elastic element 163.

[0043] The locking block 162 is rotatably connected to the housing 11 via the mounting shaft 161. One end of the elastic element 163 is connected to the housing 11, and the other end of the elastic element 163 is connected to the locking block 162. The elastic element 163 is used to drive the locking block 162 to maintain contact with the circumferential side of the input gear 12.

[0044] A slot 122 is provided on the circumferential side of the input gear 12 corresponding to the slot 162. Along the circumferential direction of the input gear 12, one end of the inner bottom surface of the slot 122 is connected to the circumferential side of the input gear 12, and the other end of the inner bottom surface of the slot 122 is at a set distance from the circumferential side of the input gear 12 to form a locking surface 123.

[0045] When the locking block 162 contacts the locking surface 123, the working opening 132 and the clearance opening 111 are aligned, and the input gear 12 can only rotate in the direction that makes the locking surface 123 move away from the locking block 162. That is, the input gear 12 can only rotate in one direction at this time, and at this time the output gear 13 is rotated back to the initial working position, which makes the operation more convenient.

[0046] Specifically, in this embodiment, the elastic element 163 is a torsion spring, which is sleeved on the mounting shaft 161. A nut 164 is threaded onto the mounting shaft 161, and the torsion spring is limited between the nut 164 and the retaining block 162. The retaining block 162 is provided with a socket for inserting into one end of the torsion spring, and the other end of the torsion spring can directly contact the inner wall surface of the housing 11.

[0047] It is understandable that the locking block 162 and the mounting shaft 161 can be rotatably connected, or the locking block 162 and the mounting shaft 161 can be fixedly connected, with the mounting shaft 161 forming a rotatable connection with the housing 11.

[0048] In this embodiment, the area of ​​housing 11 corresponding to input gear 12 will not interfere with surrounding equipment or workpieces. Therefore, the two ends of input gear 12 are rotatably connected to housing 11 through bearing 121. The height of the area of ​​housing 11 corresponding to input gear 12 is greater than the height of the area of ​​housing 11 corresponding to transition gear 14 and output gear 13.

[0049] Please refer to Figure 7 In this embodiment, a fixing post 17 is provided inside the housing 11, and the two ends of the fixing post 17 are respectively connected to the bottom shell 113 and the top cover 114. Each transition gear 14 is rotatably connected to the fixing post 17 through two bearings 141. A retaining ring 19 is provided on the inner side of the transition gear 14, and a groove 142 for connecting the retaining ring 19 can be provided on the inner side of the transition gear 14. One bearing 141 is limited between the retaining ring 19 and the bottom shell 113, and the other bearing 141 is limited between the retaining ring 19 and the top cover 114, which can reduce the axial space occupied by the bearings 141.

[0050] In this embodiment, two sets of symmetrically arranged transition gears 14 are connected between the input gear 12 and the output gear 13. Each set of transition gears 14 includes two mutually connected transition gears with a transmission ratio of 1:1, which results in a compact structure and high transmission smoothness.

[0051] The outer diameter of the transition gear 14 is smaller than that of the input gear 12 and the output gear 13, which makes the overall size of the electric open-end wrench smaller.

[0052] The housing 11 includes a bottom shell 113 and a top cover 114, which are connected by a locating pin 181. The inner walls of the housing 11 and the top cover 114 have protrusions corresponding to the areas between the input gear 12 and the intermediate gear 14, the areas between the intermediate gears 14, and the areas between the intermediate gear 14 and the output gear 13. The bottom shell 113 and the top cover 114 are fastened together by screws 182, which are positioned at the protrusions. This design maximizes space utilization while enhancing the rigidity and strength of the housing.

[0053] The working principle of this invention is as follows: During operation, an external power device drives the input gear 12 to rotate. The input gear 12 transmits power to the output gear 13 through the intermediate gear 14 meshing with it. Since at least two intermediate gears 14 simultaneously mesh with the output gear 13 on different sides, and the distance between the meshing points is greater than the width of the working opening 132, at least one meshing point can always be maintained regardless of the rotation angle of the output gear 13. This ensures that the output gear 13 can rotate continuously and without interruption, enabling continuous tightening or loosening of bolts or nuts.

[0054] It should be noted that during operation, the input gear 12 always rotates away from the locking block 162 along the locking surface 123. During this process, when the locking block 162 falls into the slot 122, it can also slide out along the inner bottom surface of the slot 122. By reversing the position of the electric open-end wrench, the output gear 13 can be made to tighten the screw or nut in the opposite direction. Before and after the work is completed, the output gear 13 can be rotated back to its initial working position using the rotary positioning mechanism 16. That is, by controlling the input gear 12 to rotate along the locking surface 123 towards the locking block 162, the locking block 162 contacts the locking surface 123, forming a one-way lock, thus aligning the working opening 132 and the clearance opening 111. This facilitates the output gear 13 to quickly insert the screw or nut next time, improving operational convenience and efficiency.

[0055] The electric open-end wrench of this preferred embodiment drives the output gear with the working opening to rotate continuously by connecting two transition gears on different sides of the output gear. At the same time, by embedding a rolling component in the housing, the overall height of the output gear can be greatly reduced, making it flexible and convenient to work in narrow, crowded or complex working environments.

[0056] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. An electric open-end wrench, characterized in that, Includes a housing and an input gear, a transition gear, and an output gear rotatably disposed within the housing; One end of the housing is provided with a connecting through hole, and the radial side of the connecting through hole passes through the housing to form a clearance opening. The output gear is rotatably connected in the connecting through hole. The output gear is provided with a working through hole corresponding to the connecting through hole. The radial side of the working through hole passes through the output gear to form a working opening. A rolling component for rolling cooperation with the output gear is embedded in the housing. At least one end of the input gear passes through the housing, the transition gear is driven between the input gear and the output gear, at least two transition gears are simultaneously driven on different sides of the output gear, and the distance between the meshing positions of the output gear and the two transition gears is greater than the width of the working opening.

2. The electric open-end wrench according to claim 1, characterized in that, The housing includes a bottom shell and a top cover. The outer surfaces of the bottom shell and the top cover are provided with a plurality of mounting through holes in a ring shape corresponding to the position of the output gear. The mounting through holes are used to install the rolling assembly, which includes balls and limiting members. The ball is disposed in the mounting through hole. The diameter of the mounting through hole at the end near the output gear is smaller than the outer diameter of the ball. The ball passes through the mounting through hole and contacts the output gear. The diameter of the mounting through hole at the end away from the output gear is greater than or equal to the outer diameter of the ball. The limiting member is disposed in the mounting through hole at the end away from the output gear. The limiting member is used to restrict the ball within the mounting through hole.

3. The electric open-end wrench according to claim 2, characterized in that, The limiting member includes a cylindrical part and a spring part. The cylindrical part is a through cylindrical structure. One end of the multiple spring parts is connected to the end of the cylindrical part, and the other end of the multiple spring parts extends into the inner side of the cylindrical part. The spring parts are used to contact the ball.

4. The electric open-end wrench according to claim 3, characterized in that, The cylindrical body includes a bent portion that bends inward, and a plurality of spring pieces are connected to the bent portion. The plurality of spring pieces, the bent portion, and the cylindrical body are integrally formed.

5. The electric open-end wrench according to claim 3, characterized in that, An annular raised step is provided on the inner wall of the mounting through hole at the end away from the output gear. The outer diameter of the cylindrical part is larger than the inner diameter of the raised step. The raised step engages the limiting member in the mounting through hole. An end cap is connected to one end of the cylindrical body away from the spring piece. The end cap includes an outer cover and an inner cover. The outer cover is interference-fitted into the stepped portion, and the inner cover is fitted into the cylindrical body. The outer diameter of the inner cover plus the wall thickness of the cylindrical body is greater than the inner diameter of the stepped portion.

6. The electric open-end wrench according to claim 2, characterized in that, Both sides of the output gear are provided with annular raceway grooves, and multiple balls are fitted into the raceway grooves.

7. The electric open-end wrench according to claim 1, characterized in that, The electric open-end wrench also includes a rotary positioning mechanism, which is disposed on one side of the input gear. The rotary positioning mechanism includes a mounting shaft, a locking block, and an elastic element. The locking block is rotatably connected to the housing via the mounting shaft. One end of the elastic element is connected to the housing, and the other end of the elastic element is connected to the locking block. The elastic element is used to drive the locking block to maintain contact with the circumferential side of the input gear. The input gear has a slot on its circumferential side surface corresponding to the card block. Along the circumferential direction of the input gear, one end of the inner bottom surface of the slot is connected to the circumferential side surface of the input gear, and the other end of the inner bottom surface of the slot is at a set distance from the circumferential side surface of the input gear to form a locking surface. When the locking block contacts the locking surface, the working opening and the clearance opening are aligned, and the input gear can only rotate in the direction that moves the locking surface away from the locking block.

8. The electric open-end wrench according to claim 7, characterized in that, The elastic element is a torsion spring, which is sleeved on the mounting shaft. A nut is threaded onto the mounting shaft, and the torsion spring is positioned between the nut and the locking block.

9. The electric open-end wrench according to claim 1, characterized in that, A fixed column is provided inside the housing. Each transition gear is rotatably connected to the fixed column through two bearings. A retaining ring is provided on the inner side of the transition gear. One bearing is limited between the retaining ring and the bottom shell, and the other bearing is limited between the retaining ring and the top cover.

10. The electric open-end wrench according to claim 1, characterized in that, The input gear and the output gear are connected by two symmetrically arranged transition gear sets. Each transition gear set includes two transition gears that are connected to each other and have a transmission ratio of 1:

1. The two ends of the input gear are rotatably connected to the housing via bearings, and the height of the area of ​​the housing corresponding to the input gear is greater than the height of the area of ​​the housing corresponding to the transition gear and the output gear. The housing includes a bottom shell and a top cover. The inner walls of the housing and the top cover are provided with protrusions in the areas corresponding to the input gear and the transition gear, the areas corresponding to the transition gear and the output gear, and the areas corresponding to the transition gear and the output gear. The bottom shell and the top cover are fastened together by screws, and the screws are connected to the positions of the protrusions.

Images