Compact hydraulic winch

Abstract

The invention discloses a compact hydraulic winch in the technical field of hydraulic winches for engineering machinery, the hydraulic winch comprises a support, a hydraulic motor, a secondary planetary system, a primary planetary system and a winding drum, the hydraulic motor, the secondary planetary system, the primary planetary system and the winding drum are mounted on the support, and the hydraulic motor transmits power to the winding drum through the primary planetary system and the secondary planetary system. The winding drum is driven to rotate; wherein the first-stage planet carrier and the second-stage sun gear are connected through a high-low tooth and axle bumper structure, one side of the second-stage sun gear is positioned through a high-low tooth end face, the other side of the second-stage sun gear is positioned through an axle bumper, the second-stage sun gear is meshed with the second-stage planet gear, and the second-stage planet gear is connected with the second-stage planet carrier through a second-stage planet gear bearing. The first-stage sun gear is meshed with a first-stage planet gear, and the first-stage planet gear is connected with a first-stage planet carrier through a first-stage planet gear bearing; the winding drum is rotationally connected with the support through a rear bearing and rotationally connected with the second-stage planet carrier through a large bearing. Spatial layout can be optimized, and the performance and reliability of the winch are improved.

Description

Technical Field

[0001] The invention relates to a compact hydraulic winch, belonging to the technical field of hydraulic winches for engineering machinery. Background Art

[0002] The hydraulic winch is a core component used in lifting equipment to lift and lower heavy objects. It uses a hydraulic system to drive the drum to reel in and out the wire rope. With the advancement of technology, the design trend of hydraulic winches is developing towards lightweight, miniaturization and aesthetics to adapt to the increasingly limited assembly space. The compact design of the hydraulic winch can significantly reduce the internal space occupied, making the entire structure more compact, reducing the product weight, and reducing manufacturing costs.

[0003] In this field, a variety of design schemes have emerged to achieve compact winches. For example, by integrating the motor and brake together and adopting a planetary bearing arrangement without an outer ring, the internal space is effectively saved. However, this design poses certain challenges in the assembly and subsequent maintenance of the motor and may not be convenient enough; another design is to build the brake device and planetary reducer into the winch to achieve a compact structure. This design simplifies the external structure, but it may also make the maintenance and maintenance of internal components more complicated; another design shortens the axial size of the winch as much as possible by directly rotating the drum and the hydraulic motor, further enhancing the compactness of the structure. This design reduces the difficulty of processing and assembly by simplifying the number of parts, but it may also make the overall structure more complicated. Finally, there is an integrated design that further reduces space occupancy by integrating the motor and brake. Although this design is more efficient in space utilization, it may also face some difficulties in the assembly and maintenance of the motor. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a compact hydraulic winch that can adapt to assembly requirements in limited space and reduce the risk of oil leakage in the winch, thereby improving the overall performance of the hydraulic winch.

[0005] In order to solve the above technical problems, the present invention is implemented by adopting the following technical solutions: A compact hydraulic winch comprises a bracket, and a hydraulic motor, a secondary planetary system, a primary planetary system and a drum installed on the bracket, wherein the hydraulic motor transmits power to the drum through the primary planetary system and the secondary planetary system to drive the drum to rotate; Wherein, the secondary planetary system includes a secondary planet carrier, a secondary planetary gear bearing, and a secondary planetary gear; the primary planetary system includes a primary planetary gear, a primary planet carrier, a primary planetary gear bearing, a primary sun gear, a shaft block, and a secondary sun gear; The primary planet carrier and the secondary sun gear are connected by a high-low gear and a shaft block structure, one side of the secondary sun gear is positioned by the high-low gear end face, and the other side is positioned by the shaft block, the secondary sun gear is meshed with the secondary planet gear, the secondary planet gear is connected to the secondary planet carrier through the secondary planet gear bearing, the primary sun gear is meshed with the primary planet gear, and the primary planet gear is connected to the primary planet carrier through the primary planet gear bearing; A rear bearing is provided at the rear end of the reel, and the reel is rotatably connected to the bracket via the rear bearing. A large bearing is installed between the reel and the secondary planetary frame, and the reel is rotatably connected to the secondary planetary frame via the large bearing.

[0006] Preferably, the hydraulic motor is a bent axis piston motor.

[0007] Preferably, the secondary planetary system is integrated with a brake, the secondary planetary carrier is provided with a brake housing and integrated with the brake housing, the brake comprises a piston, a friction plate and a disc spring, the piston presses the friction plate under the action of the disc spring to generate a braking force. Preferably, the secondary planetary carrier integrated with the brake housing is provided with an internal tooth structure connected to the friction plate.

[0008] Preferably, the secondary sun gear is a high-low tooth structure, which includes full-height teeth and shortened teeth. The full-height teeth are drivingly connected to the secondary planetary gear, and the shortened teeth are connected to the splines provided in the primary planetary carrier.

[0009] Preferably, the primary planet carrier and the secondary planet carrier are both single-wall structures.

[0010] Preferably, the reel is integrated with the second inner gear ring to form an integral structure.

[0011] Preferably, the first-stage planetary gear bearing and the second-stage planetary gear bearing both adopt full-complement cylindrical roller bearings without outer rings.

[0012] Preferably, a skeleton oil seal is installed between the secondary planet carrier and the drum, and the skeleton oil seal is a double skeleton structure, and the double skeleton structure includes a high-pressure oil seal located on the outside and a common oil seal located on the inside.

[0013] Preferably, the skeleton oil seal is arranged flush with the large bearing.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The compact hydraulic winch designed by the present invention realizes an efficient, compact and reliable power transmission system, which ensures the high efficiency of power transmission by transmitting the power of the hydraulic motor to the drum through the first-stage planetary system and the second-stage planetary system. Among them, the integrated design of the second-stage planetary system and the first-stage planetary system, as well as the high and low teeth and shaft block structure connection between the second-stage sun gear and the first-stage planetary carrier, improve the compactness and structural stability of the winch. The combined use of high and low tooth end face positioning and shaft block positioning not only enhances the positioning accuracy of the second-stage sun gear, but also effectively prevents the risk of jamming caused by the movement of the sun gear, thereby improving the reliability and transmission efficiency of the winch.

[0015] The rear bearing design at the rear end of the drum enables the drum to be stably connected to the bracket for rotation, while the large bearing assembly between the drum and the secondary planetary carrier further ensures the stability and load-bearing capacity of the rotation connection. The combined use of these designs not only improves the overall performance of the winch, but also reduces the risk of oil leakage and rust, allowing the winch to maintain stable working performance under high-speed conditions. Overall, the design of this compact hydraulic winch has achieved a compact and lightweight structure through the integration and optimization of internal components, while improving the overall performance and reliability of the winch, meeting the demand for efficient and compact hydraulic winches in the field of engineering machinery. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of a compact hydraulic winch provided by an embodiment of the present invention; Figure 2 is a schematic diagram of the structure of a secondary planetary system provided by an embodiment of the present invention; Figure 3 is a schematic diagram of the structure of a primary planetary system provided by an embodiment of the present invention; Figure 4 is a schematic diagram of the structure of a brake housing provided by an embodiment of the present invention; Figure 5 is a schematic diagram of the structure of a secondary planet carrier provided by an embodiment of the present invention; Figure 6 is a schematic diagram of the high and low tooth structure of the secondary sun gear provided by an embodiment of the present invention; Figure 7 is a side view of the high and low tooth structure of the secondary sun gear provided by an embodiment of the present invention; Figure 8 is a schematic diagram of the structure of a reel-integrated second gear ring provided in an embodiment of the present invention; In the figure: 1. hydraulic motor; 2. secondary planetary system; 3. primary planetary system; 4. wear-resistant pad; 5. reel; 6. bracket; 7. rear end cover; 8. rear bearing; 21. motor connecting plate; 22. secondary planetary carrier; 23. piston; 24. friction plate; 25. secondary planetary gear bearing; 26. secondary planetary gear; 27. motor connecting shaft; 28. large bearing; 29. ​​skeleton oil seal; 291. ordinary oil seal; 292. high-pressure oil seal; 31. primary planetary gear; 32. primary planetary carrier; 33. primary planetary gear bearing; 34. primary sun gear; 35. shaft stop; 36. secondary sun gear; 361. full-height teeth; 362. shortened teeth; 41. second gear ring; 42. brake housing; 44. cylindrical pin. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0018] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances. Example 1

[0020] See also Figure 1The present invention introduces a compact hydraulic winch, including a bracket 6, and a hydraulic motor 1, a secondary planetary system 2, a primary planetary system 3 and a drum 5 installed on the bracket 6. The hydraulic motor 1 transmits power to the drum 5 through the primary planetary system 3 and the secondary planetary system 2 to drive the drum 5 to rotate, thereby realizing the lifting and lowering of heavy objects.

[0021] See also Figure 2 and Figure 3 The secondary planetary system includes a secondary planet carrier 22, a secondary planetary gear bearing 25, and a secondary planetary gear 26; the primary planetary system 3 includes a primary planetary gear 31, a primary planet carrier 32, a primary planetary gear bearing 33, a primary sun gear 34, a shaft block 35, and a secondary sun gear 36; Among them, the primary planet carrier 32 and the secondary sun gear 36 are connected by a high-low gear and a shaft block structure. One side of the secondary sun gear 36 is positioned by the high-low gear end face, and the other side is positioned by the shaft block 35. The secondary sun gear 36 is meshed with the secondary planet gear 26, and the secondary planet gear 26 is connected to the secondary planet carrier 22 through the secondary planet gear bearing 25. The primary sun gear 34 is meshed with the primary planet gear 31, and the primary planet gear 31 is connected to the primary planet carrier 32 through the primary planet gear bearing 33; A rear bearing 8 is provided at the rear end of the reel 5 , and the reel 5 is rotatably connected to the bracket 6 via the rear bearing 8 . A large bearing 28 is provided between the reel 5 and the secondary planetary carrier 22 , and the reel 5 is rotatably connected to the secondary planetary carrier 22 via the large bearing 28 .

[0022] According to the above description, the transmission route of the hydraulic winch starts from the hydraulic motor 1, which transmits power to the primary sun gear 34, and then transmits power from the primary sun gear 34 to the primary planetary carrier 32 through the primary planetary gear 31. Then, the power is transmitted from the primary planetary carrier 32 to the secondary sun gear 36, and then from the secondary sun gear 36 to the secondary planetary gear 26, and then the power is transmitted to the drum 5 through the secondary planetary gear 26, thereby driving the drum 5 to rotate. The rotation of the drum 5 drives the wire rope wound thereon to be retracted and released, and the lifting and lowering of the heavy object is realized by the retraction and release of the wire rope. Example 2

[0023] The hydraulic motor 1 described in the embodiment of the present invention is a bent axis piston motor, which serves as the power source of the winch and load drives the entire hydraulic transmission system, and is used to match the transmission of the first-stage planetary system 3 and the second-stage planetary system 2. The two planetary systems are responsible for reducing the high-speed rotation of the hydraulic motor 1 to a lower speed suitable for the operation of the hydraulic winch, and increasing the torque so that the winch can lift heavy objects.

[0024] Further, see Figure 2 , Figure 4 and Figure 5The integration of the secondary planetary system 2 and the brake is achieved by combining the secondary planetary carrier 22 with the brake housing 42. The secondary planetary carrier 22 not only has the function of transmitting power, but also forms an integrated structure with the brake housing 42, thereby realizing the integrated design of the secondary planetary system 2 and the brake. Such an integrated method helps to save space, reduce weight, and improve the overall structural efficiency and assembly convenience.

[0025] The secondary planetary system 2 with integrated brake includes a motor connecting plate 21, a motor connecting shaft 27, a secondary planetary carrier 22, a secondary planetary gear bearing 25, a secondary planetary gear 26, a large bearing 28, a skeleton oil seal 29 and a brake.

[0026] The hydraulic motor 1 is connected to the secondary planetary system 2 with integrated brakes through the motor connecting disk 21. The motor connecting shaft 27 passes through the motor connecting disk 21 and is connected to the input shaft of the secondary planetary system 2. The motor connecting shaft 27 not only transmits power but also maintains the structural integrity of the system, ensuring efficient and stable power transmission.

[0027] In the secondary planetary system 2 with integrated brake, the components of the brake include a piston 23, a friction plate 24 and a disc spring (not shown in the figure). The piston 23 presses the friction plate 24 under the action of the disc spring to generate a braking force, ensuring that when the brake is released, the piston 23 can quickly return to its original position, thereby allowing the hydraulic winch to continue to operate.

[0028] See also Figure 2 The primary planetary system 3 includes a secondary sun gear 36, a primary sun gear 34, a primary planet carrier 32, a primary planet gear 31, and a primary planet bearing 33. The connection between the secondary sun gear 36 and the primary planet carrier 32 adopts a high-low gear and a shaft block structure, wherein one side of the secondary sun gear 36 is positioned by the high-low gear end face, and the other side is positioned by the shaft block 35.

[0029] Furthermore, participate Figure 6 and Figure 7 The secondary sun gear 36 is a high-low tooth structure, including full-height teeth 361 and shortened teeth 362, wherein the full-height teeth 361 are the normal tooth top circle of the secondary sun gear 36, and the shortened teeth 362 are obtained by cutting a certain tooth height from the normal tooth top circle of the secondary sun gear 36. The full-height teeth 361 are transmission-connected to the secondary planetary gear 36, and the shortened teeth 362 are connected to the splines (not shown in the figure) provided in the primary planetary carrier 22. The shortened teeth 362 cooperate with the splines to realize the power transition from the primary planetary system 3 to the secondary planetary system 2.

[0030] In the embodiment of the present invention, the high-low tooth structure can improve the coaxiality of the gear and reduce the axial size, improve the processing efficiency by about 40%, and reduce the cost by about 50%.

[0031] Furthermore, the first-stage planetary gear bearing 33 and the second-stage planetary gear bearing 25 adopt full-filled cylindrical roller bearings without outer rings, which have compact structure and strong load-bearing capacity, can solve the problem of limited installation space inside the planetary gear, and significantly improve the bearing assembly efficiency.

[0032] The first-stage planetary system 3 and the second-stage planetary system 2 are integrated with a first inner gear ring (not shown in the figure), and the first inner gear ring has the same number of teeth and the same module.

[0033] The primary planet carrier 32 and the secondary planet carrier 22 are both single-wall structures, which can save space. The secondary planet carrier 22 integrated with the brake housing is also provided with an internal tooth structure (not shown in the figure) connected to the friction plate 24 through arc teeth.

[0034] See also Figure 8 The reel 5 is integrated with the second inner gear ring 41 by welding to form an integrated structure. At the same time, the reel is fixedly connected to the second inner gear ring 41 by a cylindrical pin 44. The cylindrical pin 44 is welded to the reel 5 to fundamentally avoid the risk of the second inner gear ring 41 falling out.

[0035] Furthermore, a wear-resistant pad is provided on the drum 5, and the first-stage planetary system 3 is axially positioned with the wear-resistant pad through the first-stage sun gear 34, thereby ensuring the stability and accuracy of the hydraulic winch during operation.

[0036] Furthermore, a large bearing 28 is installed between the secondary planetary carrier 22 and the drum 5, providing important support for the entire hydraulic winch. The rear bearing 8 arranged at the rear end of the drum 5 is another important support for the hydraulic winch. The drum is rotatably connected to the bracket 6 through the rear bearing 8, and the rear end cover 7 covers the rear bearing 8 to play a protective and sealing role.

[0037] A skeleton oil seal 29 is also installed between the secondary planet carrier 22 and the drum 5. The skeleton oil seal 29 is a double skeleton structure, which includes a high-pressure oil seal 292 located on the outside and a common oil seal 291 located on the inside.

[0038] The existing hydraulic winch usually has only one ordinary oil seal 291, but under high speed conditions, the friction plate 24 and gear transmission inside the hydraulic winch continue to heat up after running for a period of time, resulting in an increase in internal air pressure, and due to the low pressure resistance of the ordinary oil seal 291, there is a risk of oil leakage. The embodiment of the present invention solves the risk of oil leakage by adding a high-pressure oil seal 292. The setting of the outer high-pressure oil seal 292 plays a double insurance role for the hydraulic winch, thereby improving the reliability of the hydraulic winch.

[0039] Furthermore, the skeleton oil seal 29 is arranged flush with the large bearing 28 , thereby saving the wall thickness space of the reel 5 .

[0040] Transmission route: The working process of the compact hydraulic winch starts with the hydraulic motor 1, which acts as a power source to convert hydraulic energy into mechanical energy and transmits power through the motor connecting plate 21. The power is first transmitted to the first-stage planetary system 3, and then transmitted from the first-stage planetary gear 31 to the first-stage planetary carrier 32 through the first-stage planetary gear bearing 33; after that, the power is axially positioned through the first-stage sun gear 34 and the wear-resistant pad 4 assembled on the drum 5, and further transmitted to the second-stage planetary system 2.

[0041] The power is transmitted to the secondary planetary gear 26 through the secondary sun gear 36, wherein the secondary sun gear 36 has a high-low tooth structure, the full-height teeth 361 are used for the transmission of the secondary planetary gear 26, and the short teeth 362 are used to cooperate with the splines on the primary planetary carrier to achieve the transition of power from the primary planetary system 3 to the secondary planetary system 2. The secondary planetary carrier 22 is integrated with the brake housing 42, and the piston 23 presses the friction plate 24 under the action of the disc spring to achieve the braking of the winch.

[0042] The power is finally transmitted to the second inner gear ring 41 through the secondary planetary system 2, and the second inner gear ring 41 drives the drum 5 to output, realizing the lifting and lowering of heavy objects. The rear end of the drum 5 is rotatably connected to the bracket 6 through the rear bearing 8, and the large bearing 28 is located between the drum 5 and the secondary planetary carrier 22 to provide support for the drum. In addition, the drum 5 and the second inner gear ring 41 adopt an integrated structure, which is fixedly connected by welding and cylindrical pins 44 to ensure the compactness and reliability of the structure. The design of the hydraulic winch achieves a compact layout and improves the overall performance through the integration and optimization of internal components, while reducing the risk of oil leakage and rust.

[0043] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A compact hydraulic winch, It is characterized in that It comprises a bracket (6), and a hydraulic motor (1), a secondary planetary system (2), a primary planetary system (3), and a reel (5) mounted on the bracket (6), wherein the hydraulic motor (1) transmits power to the reel (5) through the primary planetary system (3) and the secondary planetary system (2), so as to drive the reel (5) to rotate; The secondary planetary system comprises a secondary planet carrier (22), a secondary planetary gear bearing (25), and a secondary planetary gear (26); the primary planetary system (3) comprises a primary planetary gear (31), a primary planet carrier (32), a primary planetary gear bearing (33), a primary sun gear (34), a shaft stopper (35), and a secondary sun gear (36); The primary planet carrier (32) and the secondary sun gear (36) are connected by a high-low gear and shaft stop structure; one side of the secondary sun gear (36) is positioned by the high-low gear end face, and the other side is positioned by the shaft stop (35); the secondary sun gear (36) is meshed with the secondary planet gear (26); the secondary planet gear (26) is connected to the secondary planet carrier (22) via the secondary planet gear bearing (25); the primary sun gear (34) is meshed with the primary planet gear (31); the primary planet gear (31) is connected to the primary planet carrier (32) via the primary planet gear bearing (33); A rear bearing (8) is provided at the rear end of the reel (5), and the reel (5) is rotatably connected to the bracket (6) via the rear bearing (8). A large bearing (28) is mounted between the reel (5) and the secondary planetary carrier (22), and the reel (5) is rotatably connected to the secondary planetary carrier (22) via the large bearing (28).

2. The compact hydraulic winch according to claim 1, It is characterized in that The hydraulic motor (1) is a bent-axis piston motor.

3. The compact hydraulic winch according to claim 1, It is characterized in that The secondary planetary system (2) is integrated with a brake, the secondary planetary carrier (22) is provided with a brake housing (42) and is integrated with the brake housing (42), the brake comprises a piston (23), a friction plate (24) and a disc spring, and the piston (23) presses the friction plate (24) under the action of the disc spring to generate a braking force.

4. The compact hydraulic winch according to claim 3, It is characterized in that The secondary planet carrier (22) integrated with the brake housing is provided with an internal tooth structure connected to the friction plate (24).

5. The compact hydraulic winch according to claim 1, It is characterized in that The secondary sun gear (36) is a high-low tooth structure, comprising full-height teeth (361) and shortened teeth (362), the full-height teeth (361) being transmission-connected to the secondary planetary gear (26), and the shortened teeth (362) being connected to splines provided in the primary planetary carrier (22).

6. The compact hydraulic winch according to claim 1, It is characterized in that The primary planet carrier (32) and the secondary planet carrier (22) are both single-wall structures.

7. The compact hydraulic winch according to claim 1, It is characterized in that The reel (5) is integrated with the second inner gear ring (41) to form an integrated structure.

8. The compact hydraulic winch according to claim 1, It is characterized in that The first-stage planetary wheel bearing (33) and the second-stage planetary wheel bearing (25) both adopt full-complement cylindrical roller bearings without an outer ring.

9. The compact hydraulic winch according to claim 1, It is characterized in that A skeleton oil seal (29) is installed between the secondary planet carrier (22) and the drum (5); the skeleton oil seal (29) is a double skeleton structure, comprising a high-pressure oil seal (292) located on the outside and a common oil seal (291) located on the inside.

10. The compact hydraulic winch according to claim 9, It is characterized in that The skeleton oil seal (29) is arranged flush with the large bearing (28).

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