Speed change structure for winch

Abstract

An input shaft (4), an output shaft (5), a shifting fork shaft (8) and a gear shifting shaft (6) are all arranged between the front end and the rear end of a shell (1) and are arranged in parallel, the input shaft (4) extends out of one side of the front end of the shell (1), the output shaft (5) extends out of one side of the rear end of the shell (1), and the rear end of the shell (1) is used for being connected with a support (9) of the winch; the gear shifting fork (7) is connected with an operating rod (11), the input shaft (4) is provided with a first gear (12) and a second gear (13), the gear shifting fork (7) is used for shifting the first gear (12) and the second gear (13) to move together in the axial direction, the output shaft (5) is provided with a third gear (14), the gear shifting shaft (6) is provided with a fourth gear (15) and a fifth gear (16), and the third gear (14) and the fourth gear (15) are always kept meshed. The speed change structure for the winch is compact in structure and has the gear shifting capacity.

Description

Technical Field

[0001] The utility model relates to the technical field of winches, in particular to a speed change structure for winches. Background Art

[0002] At present, the conventional speed change structure used for winches generally adopts a planetary speed change gear structure, which achieves the purpose of deceleration through the planetary speed change gear structure and does not have the ability to shift gears. With the further development of winches, it has become a demand to design a compact speed change structure for winches with the ability to shift gears.

[0003] Therefore, the applicant proposes a speed change structure for a winch, which has a compact structure and a gear shifting capability. Utility Model Content

[0004] The utility model provides a speed change structure for a winch, which has a compact structure and a gear shifting capability.

[0005] In order to achieve the above object, the embodiment of the utility model adopts the following technical solution:

[0006] A speed change structure for a winch comprises a shell, an input shaft, an output shaft, a shift fork shaft, a shift shaft and a shift fork are installed in the shell, the input shaft, the output shaft, the shift fork shaft and the shift shaft are all arranged between the front and rear ends of the shell and are arranged parallel to each other, the input shaft extends from one side of the front end of the shell, the input shaft is used to input power, the output shaft extends from one side of the rear end of the shell, the output shaft is used to output power, and the rear end of the shell is used to be connected to a bracket of the winch.

[0007] An operating rod is provided on the circumference of the shell, and the operating rod is connected to the shift fork. The input shaft is provided with a first gear and a second gear that are coaxially arranged and connected together. The shift fork is slidably fitted on the fork shaft. The fork portion of the shift fork is located between the first gear and the second gear. The shift fork is used to shift the first gear and the second gear to move axially together. The output shaft is provided with a third gear, and the shift shaft is provided with a fourth gear and a fifth gear. The third gear is always meshed with the fourth gear. The first gear and the second gear are located between the fourth gear and the fifth gear. In the first gear position, the first gear and the second gear move to the side of the fourth gear and the first gear is meshed with the fourth gear. When the second gear position is required, the first gear and the second gear move to the side of the fifth gear and the second gear is meshed with the fifth gear. When in neutral, the first gear and the second gear move between the fourth gear and the fifth gear.

[0008] In some embodiments, a reverse gear shaft is further provided between the front and rear ends of the shell, and a sixth gear and a seventh gear are provided on the reverse gear shaft, the sixth gear is always meshed with the fourth gear, the third gear, the fourth gear and the sixth gear are all located on the rear end side of the shell, the fifth gear and the seventh gear are located on the front end side of the shell, and the seventh gear is axially offset relative to the fifth gear, and the seventh gear is closer to the front end side of the shell than the fifth gear. When reverse gear is required, the shift fork pushes the first gear and the second gear to move axially toward the seventh gear until the second gear is meshed with the seventh gear.

[0009] In some embodiments, the reverse gear shaft, the shift shaft, the input shaft, and the output shaft are arranged in sequence from top to bottom in the shell, an operating lever and a rotating shaft are set on the top of the shell, the rotating shaft is inserted into the shell from top to bottom, the upper end of the rotating shaft is connected to one end of the operating lever, and the lower end of the rotating shaft is connected to a horizontal swing connecting rod, which is connected to the shift fork. The operating lever drives the horizontal swing connecting rod to swing through the rotating shaft, and the swing of the horizontal swing connecting rod is used to promote the axial movement of the shift fork.

[0010] In some embodiments, the shift fork includes a socket portion, which is slidably socketed with the fork shaft, and the socket portion is provided with a slot arranged from top to bottom. The lower side of the socket portion is connected to the fork portion, and the horizontal swing connecting rod is provided with an insertion portion arranged to cooperate with the slot. When the horizontal swing connecting rod swings, the socket portion is driven to move axially through the insertion portion, and the axial movement causes the fork portion to push the first gear and the second gear to move axially together.

[0011] In some embodiments, the operating lever is configured as an inclined lever, and an angle is formed between the inclined lever and the horizontal swing link. The inclined lever is provided for horizontal rotation by the user. When the inclined lever rotates horizontally, it drives the horizontal swing link to swing through the rotating shaft. The swing of the horizontal swing link is used to promote the axial movement of the shift fork.

[0012] In some embodiments, a plurality of positioning annular grooves are provided on the shift fork shaft, and a spring-supported steel ball is provided in the sleeve portion. The steel ball cooperates with the positioning annular groove. When the shift fork is moved, the shift fork shaft can squeeze the steel ball out from one positioning annular groove and move to an adjacent positioning annular groove and then fall back into the adjacent positioning annular groove to achieve the positioning purpose.

[0013] After adopting the above structure, compared with the prior art, the utility model has the following advantages:

[0014] In the present disclosure, through the reasonable layout and connection setting of the housing, shafts, gears and other structures, the structure is compact and has the ability to shift gears. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of a speed change structure for a winch.

[0016] Figure 2 The present invention is a three-dimensional schematic diagram showing a speed change structure for a winch after removing the housing and viewing the output shaft from one side.

[0017] Figure 3 The present invention is a three-dimensional schematic diagram showing a speed change structure for a winch after removing the housing and viewing it from the input shaft side.

[0018] Figure 4 The invention is a three-dimensional schematic diagram of a speed change structure for a winch after removing the housing and the shift fork related structures.

[0019] Figure 5 The figure is a three-dimensional schematic diagram of a shift fork related structure.

[0020] Figure 6 It is a three-dimensional schematic diagram of the structure related to the sleeve connection part of a shift fork.

[0021] Figure 7 It is a three-dimensional schematic diagram of connecting the speed change structure of the present invention to the bracket of the winch.

[0022] Explanation of the reference numerals: 1-housing, 2-main body, 3-front cover, 4-input shaft, 5-output shaft, 6-shift shaft, 7-shift fork, 8-shift fork shaft, 9-bracket, 10-winch, 11-operating lever, 12-first gear, 13-second gear, 14-third gear, 15-fourth gear, 16-fifth gear, 17-reverse shaft, 18-sixth gear, 19-seventh gear, 20-rotating shaft, 21-horizontal swing connecting rod, 22-sleeve connection part, 23-slot, 24-shift fork part, 25-insertion part, 26-positioning annular groove, 27-steel ball, 28-base. DETAILED DESCRIPTION

[0023] The following description is used to disclose the utility model so that those skilled in the art can implement the utility model. The embodiments described below are for example only, and those skilled in the art may think of other obvious variations. The basic principles of the utility model defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the utility model.

[0024] like Figures 1 to 7 As shown, the present disclosure provides a speed change structure for a winch, including a shell 1, in which an input shaft 4, an output shaft 5, a fork shaft 8, a shift shaft 6 and a shift fork 7 are installed, the input shaft 4, the output shaft 5, the fork shaft 8, and the shift shaft 6 are all arranged between the front and rear ends of the shell 1 and are arranged parallel to each other, the input shaft 4 extends from one side of the front end of the shell 1, and the input shaft 4 is used to input power, the output shaft 5 extends from one side of the rear end of the shell 1, and the output shaft 5 is used to output power, and the rear end of the shell 1 is used to be connected to a bracket 9 of the winch.

[0025] like Figure 1 , 2 As shown in , 3 and 4, an operating rod 11 is provided in the circumference of the housing 1, and the operating rod 11 is connected to the shift fork 7. The input shaft 4 is provided with a first gear 12 and a second gear 13 which are coaxially arranged and connected together. The shift fork 7 is slidably fitted on the fork shaft 8. The fork portion 24 of the shift fork 7 is located between the first gear 12 and the second gear 13. The shift fork 7 is used to shift the first gear 12 and the second gear 13 to move axially together. The output shaft 5 is provided with a third gear 14, and the shift shaft 6 is provided with a fourth gear 15 and a fifth gear 16. The third gear 14 is connected to the shift fork shaft 8. The fourth gear 15 always remains engaged, and the first gear 12 and the second gear 13 are located between the fourth gear 15 and the fifth gear 16. In the first gear, the first gear 12 and the second gear 13 move to the side of the fourth gear 15 and the first gear 12 is engaged with the fourth gear 15. When the second gear is required, the first gear 12 and the second gear 13 move to the side of the fifth gear 16 and the second gear 13 is engaged with the fifth gear 16. When in neutral, the first gear 12 and the second gear 13 move between the fourth gear 15 and the fifth gear 16.

[0026] like Figure 1 , 7 As shown, the width of the present invention is relatively narrow, connected to the bracket 9 of the winch, and has a compact structure.

[0027] like Figure 7 As shown, the winch includes a hoisting drum 10 and a bracket 9, the hoisting drum 10 is rotatably connected to the bracket 9, and the speed change structure is connected to one side of the bracket 9. The speed change structure is suspended on the side of the bracket 9 through the housing 1. The speed change structure is very close to the hoisting drum 10, and the transmission is efficient. The bracket 9 is fixed on the base 28.

[0028] In some embodiments, Figure 1 , 4 As shown, the shell 1 includes a main body 2 and a front cover 3. The main body 2 is a cavity with an opening on the front side. The main body 2 and the front cover 3 are connected front to back to close the front opening, thereby facilitating production and manufacturing.

[0029] In some embodiments, Figure 2 , 3As shown in , 4, a reverse gear shaft 17 is also provided between the front and rear ends of the housing 1, and a sixth gear 18 and a seventh gear 19 are provided on the reverse gear shaft 17, and the sixth gear 18 is always meshed with the fourth gear 15, the third gear 14, the fourth gear 15, and the sixth gear 18 are all located at the rear end side of the housing 1, the fifth gear 16 and the seventh gear 19 are located at the front end side of the housing 1, and the seventh gear 19 is axially offset relative to the fifth gear 16, and the seventh gear 19 is closer to the front end side of the housing 1 relative to the fifth gear 16. When reverse gear is required, the shift fork 7 pushes the first gear 12 and the second gear 13 to move axially toward the seventh gear 19 until the second gear 13 is meshed with the seventh gear 19.

[0030] Since the diameters of the first gear 12 and the fifth gear 16 are relatively small, when the second gear 13 is meshed with the seventh gear 19 , there is a gap between the first gear 12 and the fifth gear 16 and they do not interfere with each other.

[0031] The second gear 13 passes through the fifth gear 16 before meshing with the seventh gear 19. The second gear 13 and the fifth gear 16 are meshed in the second gear state. When the second gear 13 is pushed to move toward the seventh gear 19, the second gear 13 and the fifth gear 16 are first axially separated from each other from the meshing state, and then continue to move toward the seventh gear 19 and finally mesh, thereby realizing reverse gear. The second gear 13 moves in the opposite direction and passes through the fifth gear 16 first, and then continues to move axially into the neutral position, that is, the first gear 12 and the second gear 13 move between the fourth gear 15 and the fifth gear 16.

[0032] In some embodiments, Figure 2 , 3 As shown in , 4, the reverse gear shaft 17, the shift shaft 6, the input shaft 4, and the output shaft 5 are arranged in order from top to bottom in the housing 1. The top of the housing 1 is provided with an operating rod 11 and a rotating shaft 20. The rotating shaft 20 is inserted into the housing 1 from top to bottom. The upper end of the rotating shaft 20 is connected to one end of the operating rod 11. The lower end of the rotating shaft 20 is connected to a horizontal swing link 21. The horizontal swing link 21 is connected to the shift fork 7. The operating rod 11 drives the horizontal swing link 21 to swing through the rotating shaft 20. The swing of the horizontal swing link 21 is used to push the shift fork 7 to move axially. This is conducive to a compact structure.

[0033] In some embodiments, Figure 2 , 5As shown in , 6, the shift fork 7 includes a sleeve portion 22, the sleeve portion 22 and the fork shaft 8 are slidably sleeved, the sleeve portion 22 is provided with a slot 23 arranged from top to bottom, the lower side of the sleeve portion 22 is connected to the fork portion 24, and the horizontal swing link 21 is provided with an insertion portion 25 arranged in cooperation with the slot 23. When the horizontal swing link 21 swings, the sleeve portion 22 is driven to move axially through the insertion portion 25, and the axial movement causes the fork portion 24 to push the first gear 12 and the second gear 13 to move axially together. In this way, the structure is simple and reliable.

[0034] In some embodiments, Figure 2 , 3 As shown, the operating lever 11 is configured as an inclined lever, and an angle is formed between the inclined lever and the horizontal swing link 21. The inclined lever is provided for horizontal rotation operation by the user. When the inclined lever rotates horizontally, the horizontal swing link 21 is driven to swing through the rotating shaft 20. The swing of the horizontal swing link 21 is used to push the shift fork 7 to move axially. In this way, the user can operate more comfortably.

[0035] In some embodiments, Figure 5 , 6 As shown, the fork shaft 8 is provided with a plurality of positioning annular grooves 26, and the sleeve portion 22 is provided with a spring-supported steel ball 27, which cooperates with the positioning annular groove 26. When the shift fork 7 is moved, the fork shaft 8 can squeeze the steel ball 27 out of one positioning annular groove 26 and move to the adjacent positioning annular groove 26 and then fall into the adjacent positioning annular groove 26 to achieve the positioning purpose. In this way, it is not only reliable and durable, but also conducive to the realization of gear operation.

[0036] like Figure 5 As shown, in order to shift gears more smoothly, the positioning annular groove 26 is configured with concave arc surfaces on both sides thereof, thereby making it easier to push the steel ball 27.

[0037] When understanding the present invention, if necessary, the above structure can refer to other embodiments / attached Figure 1 And understand, no further elaboration here.

[0038] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any changes or substitutions that can be thought of by any person skilled in the art within the technical scope disclosed in the present disclosure should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A speed change structure for a winch, characterized in that: The invention comprises a housing (1), wherein an input shaft (4), an output shaft (5), a shift fork shaft (8), a shift shaft (6) and a shift fork (7) are installed in the housing (1); the input shaft (4), the output shaft (5), the shift fork shaft (8) and the shift shaft (6) are all arranged between the front and rear ends of the housing (1) and are arranged parallel to each other; the input shaft (4) extends from one side of the front end of the housing (1) and is used for inputting power; the output shaft (5) extends from one side of the rear end of the housing (1) and is used for outputting power; and the rear end of the housing (1) is used for connecting to a bracket (9) of a winch; An operating rod (11) is provided in the circumferential direction of the housing (1), the operating rod (11) is connected to a shift fork (7), the input shaft (4) is provided with a first gear (12) and a second gear (13) which are coaxially arranged and connected together, the shift fork (7) is slidably fitted on the shift fork shaft (8), a shift fork portion (24) of the shift fork (7) is located between the first gear (12) and the second gear (13), the shift fork (7) is used to shift the first gear (12) and the second gear (13) to move axially together, the output shaft (5) is provided with a third gear (14), the shift shaft (6) is provided with a fourth gear (15) and a fifth gear (16), the third gear (14) and The fourth gear (15) is always in meshing engagement, and the first gear (12) and the second gear (13) are located between the fourth gear (15) and the fifth gear (16). In the first gear position, the first gear (12) and the second gear (13) move to the side of the fourth gear (15) and the first gear (12) and the fourth gear (15) are meshed. When the second gear position is required, the first gear (12) and the second gear (13) move to the side of the fifth gear (16) and the second gear (13) and the fifth gear (16) are meshed. When the gear is in neutral, the first gear (12) and the second gear (13) move between the fourth gear (15) and the fifth gear (16).

2. The speed change structure for a winch according to claim 1, characterized in that: A reverse gear shaft (17) is also provided between the front and rear ends of the housing (1), and a sixth gear (18) and a seventh gear (19) are provided on the reverse gear shaft (17). The sixth gear (18) is always meshed with the fourth gear (15). The third gear (14), the fourth gear (15) and the sixth gear (18) are all located at the rear end side of the housing (1), and the fifth gear (16) and the seventh gear (19) are located at the front end side of the housing (1). The seventh gear (19) is axially offset relative to the fifth gear (16), and the seventh gear (19) is closer to the front end side of the housing (1) relative to the fifth gear (16). When reverse gear is required, the shift fork (7) pushes the first gear (12) and the second gear (13) to move axially toward the seventh gear (19) together until the second gear (13) is meshed with the seventh gear (19).

3. The speed change structure for winch according to claim 2, characterized in that: A reverse gear shaft (17), a shift shaft (6), an input shaft (4), and an output shaft (5) are arranged in sequence from top to bottom in a housing (1); an operating rod (11) and a rotating shaft (20) are arranged at the top of the housing (1); the rotating shaft (20) is inserted into the housing (1) from top to bottom; the upper end of the rotating shaft (20) is connected to one end of the operating rod (11); the lower end of the rotating shaft (20) is connected to a horizontal swing connecting rod (21); the horizontal swing connecting rod (21) is connected to a shift fork (7); the operating rod (11) drives the horizontal swing connecting rod (21) to swing through the rotating shaft (20); the swing of the horizontal swing connecting rod (21) is used to push the shift fork (7) to move axially.

4. The speed change structure for a winch according to claim 3, characterized in that: The shift fork (7) comprises a sleeve portion (22), the sleeve portion (22) and the shift fork shaft (8) are slidably sleeved, the sleeve portion (22) is provided with a slot (23) arranged from top to bottom, the lower side of the sleeve portion (22) is connected to the shift fork portion (24), and the horizontal swing connecting rod (21) is provided with an insertion portion (25) arranged in cooperation with the slot (23), when the horizontal swing connecting rod (21) swings, the sleeve portion (22) is driven to move axially through the insertion portion (25), and the axial movement causes the shift fork portion (24) to push the first gear (12) and the second gear (13) to move axially together.

5. The speed change structure for a winch according to claim 4, characterized in that: The operating rod (11) is configured as an inclined rod, and an angle is formed between the inclined rod and the horizontal swing connecting rod (21). The inclined rod is provided for horizontal rotation operation by a user. When the inclined rod rotates horizontally, it drives the horizontal swing connecting rod (21) to swing through the rotating shaft (20). The swing of the horizontal swing connecting rod (21) is used to push the shift fork (7) to move axially.

6. The speed change structure for a winch according to claim 3, characterized in that: A plurality of positioning annular grooves (26) are arranged on the shift fork shaft (8), a spring-supported steel ball (27) is arranged in the sleeve portion (22), the steel ball (27) cooperates with the positioning annular groove (26), and when the shift fork (7) is moved, the shift fork shaft (8) can squeeze the steel ball (27) out of one positioning annular groove (26) and move to an adjacent positioning annular groove (26) and then fall into the adjacent positioning annular groove (26) again to achieve the positioning purpose.

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