Connecting structure of reduction box and end cover of electric winch

Abstract

The utility model relates to a kind of reduction gearbox and end cover connecting structure of electric winch.It solves the existing simple bolt fastening fixed bolt easy to loosen under long-term vibration, the structure concavo-convex positioning of using simple concavo-convex cooperation precision low etc. Including the reduction gearbox housing being set at the one end of winch support, the end cover seat is equipped in reduction gearbox housing one end, the circumferential positioning mechanism is equipped between reduction gearbox housing and end cover seat, the connecting seat is movably equipped in reduction gearbox housing one end inside, connecting seat penetrates reduction gearbox housing end portion and with end cover seat circumferential positioning, the axial fixing mechanism is equipped between connecting seat and end cover seat, the elastic jacking mechanism is equipped between connecting seat and reduction gearbox housing. Advantage lies in: when being fixed in axial by elastic jacking mechanism, connecting seat and end cover seat are moved towards winch support direction by the elasticity of star-shaped sealing ring, the fastening of axial fixed bolt can be further improved, the gap between end cover seat and reduction gearbox housing is eliminated, and axial fixation is more tightly stable.

Description

Technical Field

[0001] This utility model belongs to the technical field of electric winch equipment, specifically relating to a connection structure between the gearbox and end cover of an electric winch. Background Technology

[0002] Electric winches mainly consist of a motor, a reduction gear, and a drum. The output end of the reduction gear is connected to the drum, and its operation is often accompanied by vibration. Traditional gearboxes and end covers are fastened with simple bolts. Under long-term vibration, the fixing bolts are prone to loosening, causing gaps between the end cover and the gearbox body, which disrupts transmission stability and causes noise or component wear. At the same time, some use a simple concave-convex positioning structure, which has low precision and is prone to wear under vibration conditions, making it impossible to maintain reliable circumferential positioning for a long time. Summary of the Invention

[0003] The purpose of this utility model is to address the above-mentioned problems by providing a connection structure between the gearbox and the end cover of an electric winch.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a gearbox and end cover connection structure for an electric winch, comprising a gearbox housing disposed at one end of a winch support, an end cover seat disposed at the end of the gearbox housing away from the winch support, a circumferential positioning mechanism disposed between the gearbox housing and the end cover seat, a connecting seat movably disposed on the inner side of the end of the gearbox housing near the end cover seat, the connecting seat penetrating the end of the gearbox housing and being circumferentially positioned with the end cover seat, an axial fixing mechanism disposed between the connecting seat and the end cover seat, and an elastic clamping mechanism disposed between the connecting seat and the gearbox housing, which allows the connecting seat and the end cover seat to move toward the winch support when the connecting seat and the end cover seat are axially fixed.

[0005] In the above-mentioned gearbox and end cover connection structure of an electric winch, the end of the gearbox housing near the end cover seat is closed, and the end of the end cover seat facing the gearbox housing is open.

[0006] In the aforementioned connection structure between the gearbox and end cover of an electric winch, the closed end of the gearbox housing has a mounting recess, and the open end of the end cover seat has an annular end cover skirt that abuts against the outer circumference of the mounting recess. The end cover seat has several ribs extending outwards to the annular end cover skirt. The ribs on the outer circumference of the end cover seat specifically reinforce the weak point of the skirt, dispersing stress through their reinforcing effect and preventing cracking of the skirt during assembly or use. This design does not increase the overall weight of the end cover seat, balancing strength and lightweight. Furthermore, the design of the annular skirt abutting against the mounting recess serves as a guide structure during assembly, allowing the skirt to be quickly aligned along the outer side of the recess when installing the end cover seat, reducing alignment time and improving assembly efficiency.

[0007] In the aforementioned connection structure between the gearbox and end cover of an electric winch, the circumferential positioning mechanism includes a first positioning ring disposed circumferentially within the open end of the end cover seat. Several reinforcing ribs are provided between the outer circumferential side of the first positioning ring and the inner circumferential side of the end cover seat. The closed end of the gearbox housing has a second positioning ring corresponding to the first positioning ring, and the first and second positioning rings are connected by a circumferential positioning assembly. The correspondence between the first and second positioning rings provides a structural reference for the subsequent insertion of the positioning protrusion and positioning groove, ensuring a one-to-one correspondence in circumferential positioning and avoiding rotational gaps caused by misalignment. Simultaneously, the reinforcing ribs between the outer side of the first positioning ring and the inner side of the end cover seat transmit the circumferential force borne by the positioning ring to the end cover seat body, improving the torsional strength of the positioning ring and preventing positioning failure after long-term use.

[0008] In the aforementioned connection structure between the gearbox and end cover of an electric winch, the circumferential positioning component includes several positioning protrusions circumferentially disposed at the outer end of a first positioning ring, and several circumferentially distributed positioning grooves corresponding one-to-one with the positioning protrusions at the outer end of a second positioning ring, wherein the positioning protrusions and positioning grooves are interlocked. Compared to complex structures such as gear meshing and keyway connections, this interlocking design of positioning protrusions and positioning grooves is easier to manufacture, lower in cost, and less prone to positioning failure due to manufacturing errors.

[0009] In the aforementioned gearbox and end cover connection structure of an electric winch, the inner side of the gearbox housing near the center of the end cover seat has an inner cylinder integrally formed with the gearbox housing. The connecting seat is movably disposed within the inner cylinder, and one end of the connecting seat passes through a central hole located at the center of the closed end of the gearbox housing and is circumferentially connected to a positioning cylinder located at the center of the open end of the end cover seat. The inner cylinder is integrally formed with the gearbox housing, which, compared to a separate structure, reduces assembly gaps and improves the impact resistance of the inner cylinder.

[0010] In the aforementioned connection structure between the gearbox and end cover of an electric winch, one end of the connecting seat has a non-circular cross-section insertion portion, and the bottom of the positioning cylinder has an insertion groove that matches the insertion portion. The insertion portion is circumferentially positioned and inserted into the insertion groove. The insertion portion of the connecting seat and the insertion groove of the positioning cylinder can achieve circumferential gapless positioning. Compared with keyed connections, the plug-in structure is more convenient to assemble and easier to disassemble, balancing reliability and maintainability.

[0011] In the aforementioned connection structure between the gearbox and end cover of an electric winch, the axial fixing mechanism includes a bolt mounting hole located at one end of the inner cylinder of the connecting seat. An axial fixing bolt is installed in the bolt mounting hole, passing through the connecting seat and connected to a bolted connecting cylinder bolt located within the positioning cylinder. This threaded connection structure, utilizing the bolt mounting hole of the connecting seat, the axial fixing bolt, and the bolted connecting cylinder of the positioning cylinder, allows for controllable axial preload. The tightening force can be adjusted according to the winch's working load, preventing axial loosening. Furthermore, the threaded connection allows for subsequent disassembly, significantly improving the convenience of later maintenance and reducing repair costs compared to welded or integrally formed structures.

[0012] In the aforementioned connection structure between the gearbox and end cover of an electric winch, the elastic clamping mechanism includes a disc-shaped body formed on the outer side of one end of the inner cylinder of the connecting seat. The outer side of the disc-shaped body is provided with a cylindrical part located on the outer periphery of the connecting seat and coaxially arranged with the connecting seat. A sealing ring mounting groove is formed between the outer side of the connecting seat, one side of the disc-shaped body, and the inner side of the cylindrical part. A star-shaped sealing ring is provided in the sealing ring mounting groove and fitted on the outer side of the connecting seat. One side of the star-shaped sealing ring protrudes from the sealing ring mounting groove and abuts against the inner side of the closed end of the reducer housing. An annular deformation gap is formed between the inner side of the closed end of the reducer housing and the end of the cylindrical part away from the disc-shaped body. The star-shaped sealing ring achieves a seal between the connecting seat and the closed end of the housing. At the same time, the elasticity of the sealing ring provides a clamping force for the connecting seat and end cover seat to move towards the bracket. A single component achieves the dual functions of sealing and elastic clamping, simplifying the structure and reducing the number of parts. An annular deformation gap is set between the inner side of the closed end of the housing and the cylindrical part to prevent excessive compression damage to the sealing ring due to the lack of deformation space when it is compressed. The gap can accommodate the elastic deformation of the sealing ring and allows for slight displacement of the cylindrical part when the connecting seat moves axially, improving the elastic adaptability of the structure. Furthermore, the sealing ring mounting groove ensures accurate circumferential positioning of the star-shaped sealing ring, preventing the sealing ring from shifting or flipping during axial movement, and ensuring the stability of the sealing and clamping effect.

[0013] In the above-mentioned gearbox and end cover connection structure of an electric winch, the gearbox housing is provided with several bracket connecting parts on the outer circumference of the end away from the end cover seat, and the winch bracket is provided with several housing connecting parts corresponding to the bracket connecting parts on the outer circumference of the end near the gearbox housing, and the bracket connecting parts are connected to the housing connecting parts by connecting bolts.

[0014] Compared with existing technologies, the advantages of this utility model are:

[0015] 1. When the device is axially fixed by means of the elastic clamping mechanism, the connecting seat and the end cover seat move towards the winch bracket by means of the elastic force of the star-shaped sealing ring. This can further improve the tightness of the axial fixing bolts, eliminate the gap between the end cover seat and the reducer housing, and make the axial fixation tighter and more stable.

[0016] 2. The device ensures the stability of the relative circumferential position between the reducer housing and the end cover seat through a circumferential positioning mechanism. The first positioning ring and the second positioning ring are precisely inserted into the positioning groove via positioning protrusions to prevent circumferential misalignment. At the same time, the connecting seat is positioned and connected to the end cover seat through the insertion part and insertion groove, which can also prevent circumferential rotation between the connecting seat and the end cover seat.

[0017] 3. The axial fixing mechanism of this device uses axial fixing bolts to fasten the bolted connection between the connecting seat and the end cover seat to the cylinder body. The connection is stable and can withstand a large axial force, preventing the end cover seat from axially loosening. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is an exploded view of the structure of this utility model.

[0020] Figure 3 This is a cross-sectional view of the reducer housing and end cover seat in this utility model.

[0021] Figure 4 This is a schematic diagram of the reducer housing in this utility model.

[0022] Figure 5 This is a structural schematic diagram of the reducer housing from another perspective in this utility model.

[0023] Figure 6 This is a schematic diagram of the structure of the middle cover seat of this utility model.

[0024] Figure 7 This is a schematic diagram of the connecting seat in this utility model.

[0025] In the diagram: 1. Winch bracket, 11. Housing connection part, 12. Connecting bolt, 2. Reducer housing, 21. Mounting recess, 22. Inner cylinder, 23. Center hole, 24. Bracket connection part, 3. End cover seat, 31. Annular end cover skirt, 32. Rib, 33. Positioning cylinder, 34. Insertion groove, 4. Circumferential positioning mechanism, 41. First positioning ring, 42. Reinforcing rib, 43. Second positioning ring, 44. Circumferential positioning assembly, 45. Positioning protrusion, 46. Positioning groove, 5. Connecting seat, 51. Insertion part, 6. Axial fixing mechanism, 61. Bolt mounting hole, 62. Axial fixing bolt, 63. Bolt connecting cylinder, 7. Elastic tightening mechanism, 71. Disc-shaped body, 72. Cylindrical part, 73. Sealing ring mounting groove, 74. Star-shaped sealing ring, 75. Annular deformation gap. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0027] like Figure 1-7 As shown, a gearbox and end cover connection structure for an electric winch includes a gearbox housing 2 disposed at one end of a winch support 1. An end cover seat 3 is provided at the end of the gearbox housing 2 away from the winch support 1. A circumferential positioning mechanism 4 is provided between the gearbox housing 2 and the end cover seat 3. A connecting seat 5 is movably disposed on the inner side of the end of the gearbox housing 2 near the end cover seat 3. The connecting seat 5 passes through the end of the gearbox housing 2 and is circumferentially positioned with the end cover seat 3. An axial fixing mechanism 6 is provided between the connecting seat 5 and the end cover seat 3. An elastic clamping mechanism 7 is provided between the connecting seat 5 and the gearbox housing 2, which allows the connecting seat 5 and the end cover seat 3 to move towards the winch support 1 when axially fixed. The circumferential positioning mechanism 4 enables the gearbox housing 2 and the end cover seat 3 to be circumferentially positioned, while the axial fixing mechanism 6 simultaneously fixes the gearbox housing 2 and the end cover seat 3. Furthermore, the elastic clamping mechanism 7 further enhances the fixing effect of the axial fixing mechanism 6.

[0028] like Figure 2 As shown, the end of the reducer housing 2 near the end cover 3 is closed, while the end of the end cover 3 facing the reducer housing 2 is open.

[0029] Combination Figure 4 and Figure 6 As shown, the closed end of the reducer housing 2 has a mounting recess 21, and the open end of the end cover seat 3 has an annular end cover skirt 31 that abuts against the mounting recess 21 and extends outward. The end cover seat 3 has several ribs 32 extending outward to the annular end cover skirt 31. The ribs 32 on the outward side of the end cover seat 3 specifically reinforce the weak part of the skirt. The reinforcing ribs 32 disperse stress and prevent the skirt from cracking during assembly or use. At the same time, it does not increase the overall weight of the end cover seat 3, thus balancing strength and lightweight. In addition, the design of the annular skirt abutting against the mounting recess 21 can serve as a guide structure during assembly. When installing the end cover seat 3, the skirt can be quickly aligned along the outside of the recess, reducing alignment time and improving assembly efficiency.

[0030] The circumferential positioning mechanism 4 includes a first positioning ring 41 disposed circumferentially within the open end of the end cover 3. Several reinforcing ribs 42 are provided between the outer circumferential side of the first positioning ring 41 and the inner circumferential side of the end cover 3. The closed end of the reducer housing 2 has a second positioning ring 43 corresponding to the first positioning ring 41, and the first positioning ring 41 and the second positioning ring 43 are connected by a circumferential positioning assembly 44. The correspondence between the first positioning ring 41 and the second positioning ring 43 provides a structural reference for the subsequent insertion of the positioning protrusion 45 into the positioning groove 46, ensuring a one-to-one correspondence in circumferential positioning and avoiding rotational gaps caused by misalignment. Simultaneously, the reinforcing ribs 42 are provided between the outer side of the first positioning ring 41 and the inner side of the end cover 3. The reinforcing ribs 42 can transmit the circumferential force borne by the positioning ring to the main body of the end cover 3, improving the torsional strength of the positioning ring and preventing positioning failure after long-term use.

[0031] Specifically, the circumferential positioning component 44 includes several positioning protrusions 45 circumferentially disposed at the outer end of the first positioning ring 41, and several circumferentially distributed positioning grooves 46 corresponding one-to-one with the positioning protrusions 45 at the outer end of the second positioning ring 43, with the positioning protrusions 45 and positioning grooves 46 interlocking with each other. Compared with complex structures such as gear meshing and keyway connections, the interlocking design of positioning protrusions 45 and positioning grooves 46 is easier to manufacture, lower in cost, and less prone to positioning failure due to manufacturing errors.

[0032] Combination Figure 3 , Figure 5 and Figure 6 As shown, the inner side of the reducer housing 2 near the center of the end cap 3 has an inner cylinder 22 integrally formed with the reducer housing 2. A connecting seat 5 is movably disposed inside the inner cylinder 22. One end of the connecting seat 5 passes through the central hole 23 located at the center of the closed end of the reducer housing 2 and is circumferentially positioned and connected to the positioning cylinder 33 located at the center of the open end of the end cap 3. The inner cylinder 22 is integrally formed with the reducer housing 2, which reduces the assembly gap and improves the impact resistance of the inner cylinder 22 compared to a separate structure.

[0033] Combination Figure 6 and Figure 7 As shown, one end of the connecting seat 5 has a non-circular cross-section insertion portion 51, and the bottom of the positioning cylinder 33 has an insertion groove 34 that matches the insertion portion 51. The insertion portion 51 is circumferentially positioned and inserted into the insertion groove 34. The insertion portion 51 of the connecting seat 5 and the insertion groove 34 of the positioning cylinder 33 can achieve circumferential gapless positioning. Compared with keyed connections, the plug-in structure is more convenient to assemble and easier to disassemble, taking into account both reliability and maintainability.

[0034] Combination Figure 2 , Figure 3 , Figure 6 and Figure 7As shown, the axial fixing mechanism 6 includes a bolt mounting hole 61 located at one end of the connecting seat 5 inside the inner cylinder 22. An axial fixing bolt 62 is provided in the bolt mounting hole 61, passing through the connecting seat 5 and bolted to the bolt connecting cylinder 63 located inside the positioning cylinder 33. The threaded connection structure of the bolt mounting hole 61 of the connecting seat 5, the axial fixing bolt 62, and the bolt connecting cylinder 63 of the positioning cylinder 33 allows for controllable axial preload, enabling adjustment of the tightening force according to the winch's working load and preventing axial loosening. Simultaneously, the threaded connection allows for subsequent disassembly, significantly improving the convenience of later maintenance and reducing repair costs compared to welded or integrally formed structures.

[0035] The elastic clamping mechanism 7 includes a disc-shaped body 71 formed on the inner side of the inner cylinder 22 of the connecting seat 5. The disc-shaped body 71 is provided with a cylindrical part 72 on the outer side of the connecting seat 5 and coaxially arranged with the connecting seat 5. A sealing ring mounting groove 73 is formed between the outer side of the connecting seat 5, one side of the disc-shaped body 71, and the inner side of the cylindrical part 72. A star-shaped sealing ring 74 is provided in the sealing ring mounting groove 73 and sleeved on the outer side of the connecting seat 5. One side of the star-shaped sealing ring 74 is exposed in the sealing ring mounting groove 73 and abuts against the inner side of the closed end of the reducer housing 2. An annular deformation gap 75 is formed between the inner side of the closed end of the reducer housing 2 and the end of the cylindrical part 72 away from the disc-shaped body 71. The star-shaped sealing ring 74 achieves the seal between the connecting seat 5 and the closed end of the housing. At the same time, the elasticity of the sealing ring provides a clamping force for the connecting seat 5 and the end cover seat 3 to move towards the bracket. One component achieves the dual functions of sealing and elastic clamping, simplifying the structure and reducing the number of parts. Meanwhile, an annular deformation gap 75 is provided between the inner side of the closed end of the housing and the cylindrical part 72 to prevent excessive compression damage caused by the lack of deformation space when the sealing ring is compressed. The gap can accommodate the elastic deformation of the sealing ring and allows for slight displacement of the cylindrical part 72 when the connecting seat 5 moves axially, improving the elastic adaptability of the structure. Furthermore, the sealing ring mounting groove 73 ensures the accurate circumferential positioning of the star-shaped sealing ring 74, preventing the sealing ring from shifting or flipping during axial movement, and ensuring the stability of the sealing and clamping effect.

[0036] Combination Figure 1 and Figure 2 As shown, the reducer housing 2 is provided with several bracket connecting parts 24 on the outer circumference of the end away from the end cover seat 3, and the winch bracket 1 is provided with several housing connecting parts 11 on the outer circumference of the end near the reducer housing 2, which are corresponding to the bracket connecting parts 24. The bracket connecting parts 24 are connected to the housing connecting parts 11 by connecting bolts 12.

[0037] The principle of this embodiment is as follows:

[0038] When the end cover seat 3 moves closer to the reducer housing 2, the annular end cover skirt 31 of the end cover seat 3 first abuts against the outer circumference of the mounting recess 21 of the housing, forming a preliminary radial limit. At the same time, the first positioning ring 41 on the inner side of the end cover seat 3 is precisely aligned with the second positioning ring 43 at the closed end of the housing. The positioning protrusion 45 on the first positioning ring 41 is inserted into the positioning groove 46 of the second positioning ring 43 to achieve circumferential anti-rotation positioning. The connecting seat 5 is then inserted from the inner cylinder 22, with one end passing through the central hole 23 at the closed end of the housing, until the insertion part 51 of the connecting seat 5 is inserted into the insertion groove 34 of the positioning cylinder 33 at the center of the end cover seat 3, thus preventing relative rotation. Subsequently... The axial fixing bolt 62 is inserted through the bolt mounting hole 61 inside the connecting seat 5 and screwed into the bolt connecting cylinder 63 inside the positioning cylinder 33 of the end cover seat 3. The connecting seat 5 and the end cover seat 3 are pulled together and fixed by the thread preload force to complete the axial rigid connection between the two. During the tightening of the axial fixing bolt 62, the connecting seat 5 is pulled by the bolt and moves closer to the end cover seat 3. At this time, the star-shaped sealing ring 74 in the sealing ring mounting groove 73 will be squeezed by the inner side of the closed end of the reducer housing 2 and the disc-shaped body 71 of the connecting seat 5. The elastic deformation of the star-shaped sealing ring 74 itself generates a reverse tightening force, which pushes the connecting seat 5 and the end cover seat 3 as a whole to move towards the winch bracket 1.

[0039] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0040] Although this document frequently uses terms such as winch bracket 1, housing connection part 11, connecting bolt 12, reducer housing 2, mounting recess 21, inner cylinder 22, center hole 23, bracket connection part 24, end cover seat 3, annular end cover skirt 31, protruding rib 32, positioning cylinder 33, insertion groove 34, circumferential positioning mechanism 4, first positioning ring 41, reinforcing rib 42, second positioning ring 43, circumferential positioning assembly 44, positioning protrusion 45, positioning groove 46, connecting seat 5, insertion part 51, axial fixing mechanism 6, bolt mounting hole 61, axial fixing bolt 62, bolt connecting cylinder 63, elastic tightening mechanism 7, disc-shaped body 71, cylindrical part 72, sealing ring mounting groove 73, star-shaped sealing ring 74, annular deformation gap 75, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A gearbox and end cover connection structure for an electric winch, comprising a gearbox housing (2) disposed at one end of a winch support (1), wherein an end cover seat (3) is provided at the end of the gearbox housing (2) away from the winch support (1), characterized in that, A circumferential positioning mechanism (4) is provided between the reducer housing (2) and the end cover seat (3). A connecting seat (5) is movably provided on the inner side of the end of the reducer housing (2) near the end cover seat (3). The connecting seat (5) passes through the end of the reducer housing (2) and is circumferentially positioned with the end cover seat (3). An axial fixing mechanism (6) is provided between the connecting seat (5) and the end cover seat (3). An elastic clamping mechanism (7) is provided between the connecting seat (5) and the reducer housing (2) so that the connecting seat (5) and the end cover seat (3) can move towards the winch support (1) when the connecting seat (5) and the end cover seat (3) are axially fixed.

2. The connection structure between the gearbox and the end cover of an electric winch according to claim 1, characterized in that, The end of the reducer housing (2) near the end cover seat (3) is closed, and the end of the end cover seat (3) facing the reducer housing (2) is open.

3. The gearbox and end cover connection structure of an electric winch according to claim 2, characterized in that, The closed end of the reducer housing (2) has a mounting recess (21), and the open end of the end cover seat (3) has an annular end cover skirt (31) that abuts against the mounting recess (21) on the outer side. The end cover seat (3) has a number of protruding ribs (32) extending to the annular end cover skirt (31) on the outer side.

4. The gearbox and end cover connection structure of an electric winch according to claim 1, 2, or 3, characterized in that, The circumferential positioning mechanism (4) includes a first positioning ring (41) disposed circumferentially inside the open end of the end cover seat (3). A plurality of reinforcing ribs (42) are provided between the outer circumferential side of the first positioning ring (41) and the inner circumferential side of the end cover seat (3). The closed end of the reducer housing (2) has a second positioning ring (43) corresponding to the first positioning ring (41). The first positioning ring (41) and the second positioning ring (43) are connected by a circumferential positioning assembly (44).

5. The gearbox and end cover connection structure of an electric winch according to claim 4, characterized in that, The circumferential positioning component (44) includes a plurality of positioning protrusions (45) circumferentially disposed at the outer end of the first positioning ring (41), and the outer end of the second positioning ring (43) is provided with a plurality of circumferentially distributed positioning grooves (46) corresponding one-to-one with the positioning protrusions (45), and the positioning protrusions (45) and the positioning grooves (46) are interlocked with each other.

6. The gearbox and end cover connection structure of an electric winch according to claim 4, characterized in that, The reducer housing (2) has an inner cylinder (22) on the inner side of the center of one end near the end cover seat (3), which is integrally connected with the reducer housing (2). The connecting seat (5) is movably disposed in the inner cylinder (22). One end of the connecting seat (5) passes through the center hole (23) located at the center of the closed end of the reducer housing (2) and is circumferentially positioned and connected to the positioning cylinder (33) located at the center of the open end of the end cover seat (3).

7. The gearbox and end cover connection structure of an electric winch according to claim 6, characterized in that, The connecting seat (5) has a non-circular cross-section insertion part (51) at one end, and the bottom of the positioning cylinder (33) has an insertion groove (34) that matches the insertion part (51), and the insertion part (51) is circumferentially positioned and inserted into the insertion groove (34).

8. The gearbox and end cover connection structure of an electric winch according to claim 6, characterized in that, The axial fixing mechanism (6) includes a bolt mounting hole (61) located at one end of the inner cylinder (22) of the connecting seat (5). An axial fixing bolt (62) is provided in the bolt mounting hole (61). The axial fixing bolt (62) passes through the connecting seat (5) and is bolted to the bolt connecting cylinder (63) located in the positioning cylinder (33).

9. The gearbox and end cover connection structure of an electric winch according to claim 6, characterized in that, The elastic clamping mechanism (7) includes a disc-shaped body (71) formed on the inner side of the inner cylinder (22) of the connecting seat (5) and circumferentially outward. The disc-shaped body (71) is provided with a cylindrical part (72) located on the outer periphery of the connecting seat (5) and coaxially arranged with the connecting seat (5). A sealing ring mounting groove (73) is formed between the outer periphery of the connecting seat (5), one side of the disc-shaped body (71), and the inner periphery of the cylindrical part (72). A star-shaped sealing ring (74) is provided in the sealing ring mounting groove (73) and sleeved on the outer periphery of the connecting seat (5). One side of the star-shaped sealing ring (74) is exposed in the sealing ring mounting groove (73) and abuts against the inner side of the closed end of the reducer housing (2). An annular deformation gap (75) is formed between the inner side of the closed end of the reducer housing (2) and the end of the cylindrical part (72) away from the disc-shaped body (71).

10. The gearbox and end cover connection structure of an electric winch according to claim 1, characterized in that, The reducer housing (2) is provided with several bracket connecting parts (24) on the outer side of the end away from the end cover seat (3). The winch bracket (1) is provided with several housing connecting parts (11) on the outer side of the end close to the reducer housing (2) and corresponding to the bracket connecting parts (24). The bracket connecting parts (24) are connected to the housing connecting parts (11) by connecting bolts (12).

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