Swing mechanism of wood conveying and logging arm

Abstract

The utility model discloses a wood conveying skidding arm slewing mechanism, which comprises a slewing seat, a gear shaft, a gear, a driving mechanism and a skidding arm mechanism, the gear shaft is rotatably connected with the slewing seat, the gear is arranged on the gear shaft and fixedly connected with the gear shaft, the driving mechanism is fixedly arranged on the slewing seat, the driving mechanism is in transmission connection with the gear, and the skidding arm mechanism is fixedly connected with the gear shaft. And the material collecting arm mechanism is fixedly connected with the gear shaft. The four hydraulic oil cylinders drive the racks to move to drive the logging arm to rotate, large enough driving force can be provided for rotation of the logging arm, the racks are symmetrically arranged on the two sides of the gear shaft, compared with a hydraulic motor driving mode, the gear shaft can bear large radial force, logging operation is safer and more efficient, and the working efficiency is improved. The device is compact in structure and narrow in width, the overall length of the frame can be reduced, and a larger space is vacated for wood loading.

Description

Technical Field

[0001] The utility model relates to the technical field of forestry machinery and equipment, in particular to a rotary mechanism for a log skidding boom. Background Art

[0002] At present, the machinery and equipment for transporting wood includes a boom and an arm. The boom and the arm are hinged, and the boom is driven by a telescopic cylinder. In order to enable the boom and the arm to rotate flexibly, a rotary mechanism for driving the arm to rotate needs to be provided on the arm, so that the arm drives the boom to rotate when rotating to complete the wood transportation work. However, the existing rotary mechanism often adopts a hydraulic motor drive mode. The hydraulic motor drive mode easily causes the bearing connecting the hydraulic motor and the arm to be unable to bear a large radial force, and it is prone to failure and there are potential safety hazards during long-term operation. Moreover, the hydraulic motor drive structure needs to occupy a large amount of installation space, resulting in a reduction in the wood loading space, which is not conducive to the transportation of wood. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a rotary mechanism for a log skidding boom. The utility model drives the skidding boom to rotate by driving a rack to move with four hydraulic cylinders, which can provide a large enough driving force for the rotation of the skidding boom. The racks are symmetrically arranged on both sides of the gear shaft, enabling the gear shaft to bear a large radial force, making the skidding operation safer and more efficient. The device has a compact structure and a narrow width, can reduce the overall length of the vehicle frame, and vacate a larger space for wood loading.

[0004] In order to achieve the above-mentioned utility model purpose, the technical solution adopted by the utility model is as follows:

[0005] According to one aspect of the present utility model, a log skidding boom is provided, including a rotary base, a gear shaft, a gear, a driving mechanism, and a skidding boom;

[0006] The gear shaft is rotatably connected to the rotary base;

[0007] The gear is arranged on the gear shaft and fixedly connected to the gear shaft;

[0008] The driving mechanism is fixedly arranged on the rotary base. The driving mechanism includes a rack and a driving component for driving the rack to move. The rack meshes with the gear, and the rack is fixedly connected to the driving component;

[0009] The skidding boom is fixedly connected to the gear shaft.

[0010] Preferably, two racks are provided. The two racks are arranged in parallel on opposite sides of the gear, and the two racks respectively mesh with the gear.

[0011] Preferably, the driving assembly includes a first oil cylinder barrel, a first piston, a second oil cylinder barrel and a second piston, and the two racks are respectively arranged in the first oil cylinder barrel and the second oil cylinder barrel;

[0012] Both ends of the rack located in the first oil cylinder barrel are fixedly connected with the first piston, and the first piston is movably connected with the first oil cylinder barrel;

[0013] Both ends of the rack located in the second oil cylinder barrel are fixedly connected with the second piston, and the second piston is movably connected with the second oil cylinder barrel;

[0014] One end of the first oil cylinder barrel is provided with a first oil port of the oil cylinder, and the other end is provided with a second oil port of the oil cylinder;

[0015] One end of the second oil cylinder barrel is provided with a third oil port of the oil cylinder, and the other end is provided with a fourth oil port of the oil cylinder.

[0016] Preferably, the skidding boom mechanism includes a main boom, a swing arm and a telescopic oil cylinder. The main boom is hinged to the swing arm, the swing arm is fixedly connected with the gear shaft, one end of the telescopic oil cylinder is hinged to the swing arm, and the other end is hinged to the main boom.

[0017] Preferably, it further includes a copper bushing, and the copper bushing is fixedly arranged between the gear shaft and the inner wall of the slewing base.

[0018] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present utility model are as follows:

[0019] The present utility model drives the rack to move to drive the rotation of the skidding boom through four hydraulic cylinders, which can provide a large enough driving force for the rotation of the skidding boom. The racks are symmetrically arranged on both sides of the gear shaft. Compared with the driving method of a hydraulic motor, the gear shaft can bear a large radial force, making the skidding operation safer and more efficient. The device has a compact structure and a narrow width, can reduce the overall length of the vehicle frame, and leave a larger space for wood loading. Description of the Drawings

[0020] Figure 1 is the overall structural schematic diagram of the present utility model;

[0021] Figure 2 is the sectional view of the overall structure of the present utility model;

[0022] Figure 3 is the internal structural schematic diagram of the driving mechanism of the present utility model.

[0023] In the attached drawings, 1 is a slewing base; 2 is a gear shaft; 3 is a gear; 4 is a driving mechanism; 5 is a logging boom mechanism; 6 is a slewing base housing; 7 is a first oil cylinder; 8 is a second oil cylinder; 9 is a third oil cylinder; 10 is a fourth oil cylinder; 11 is a copper bushing; 12 is a bearing; 41 is a rack; 42 is a driving assembly; 51 is a main boom; 52 is a swivel arm; 53 is a telescopic oil cylinder; 411 is a first rack; 412 is a second rack; 421 is a first oil cylinder barrel; 422 is a first piston; 423 is a second oil cylinder barrel; 424 is a second piston. Detailed implementation manners

[0024] To make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the following preferred embodiments are cited with reference to the attached drawings for a further detailed description of the present utility model. However, it should be noted that many details listed in the specification are only for enabling the reader to have a thorough understanding of one or more aspects of the utility model, and these aspects of the present utility model can be implemented even without these specific details.

[0025] Please refer to Figures 1 to 3 , the present utility model provides a logging boom slewing mechanism, and the technical solution is as follows:

[0026] A logging boom slewing mechanism includes a slewing base 1, a gear shaft 2, a gear 3, a driving mechanism 4 and a logging boom mechanism 5. A slewing base housing 6 is fixedly arranged on the slewing base 1. The gear shaft 2 is arranged in the slewing base housing 6. The gear shaft 2 is rotatably connected with the slewing base housing 6. The gear shaft 2 is vertically arranged in the slewing base housing 6. The lower end of the gear shaft 2 is connected with the slewing base 1 through a bearing 12. The inner side of the bearing 12 is fixedly connected with the gear shaft 2, and the outer side of the bearing 12 is fixedly connected with the slewing base 1. The gear shaft 2 can rotate relative to the slewing base 1. The upper end of the gear shaft 2 is fixedly connected with a logging boom mechanism 5. The logging boom mechanism 5 includes a main boom 51, a swivel arm 52 and a telescopic oil cylinder 53. The main boom 51 is hinged to the swivel arm 52. The main boom 51 can rotate relative to the swivel arm 52. A telescopic oil cylinder 53 is arranged between the main boom 51 and the swivel arm 52. One end of the telescopic oil cylinder 53 is hinged to the swivel arm 52, and the output end of the telescopic oil cylinder 53 is hinged to the main boom 51. The main boom 51 can be driven by the telescopic oil cylinder 53 to rotate relative to the swivel arm 52. One end of the swivel arm 52 far from the main boom 51 is fixedly connected with the gear shaft 2. When the gear shaft 2 rotates, the swivel arm 52 rotates following the gear shaft 2. Further, a copper bushing 11 is arranged between the gear shaft 2 and the slewing base housing 6. The copper bushing 11 is sleeved on the gear shaft 2. The copper bushing 11 is used to reduce the wear of the gear shaft 2.

[0027] A gear 3 is provided on a gear shaft 2, and a driving mechanism 4 is drivingly connected to the gear 3. By driving the gear 3 through the driving mechanism 4, the gear 3 drives the gear shaft 2 to rotate. Specifically, the driving mechanism 4 includes a rack 41 and a driving assembly 42 for driving the rack 41 to move. The driving assembly 42 includes a first cylinder barrel 421, a first piston 422, a second cylinder barrel 423, and a second piston 424. The first cylinder barrel 421 and the second cylinder barrel 423 are arranged on opposite sides of the gear 3, and the first cylinder barrel 421 and the second cylinder barrel 423 are arranged in parallel. The first cylinder barrel 421 and the second cylinder barrel 423 respectively pass through a slewing base box body 6. A first communication port is provided in the middle of the first cylinder barrel 421, and a second communication port is provided in the middle of the second cylinder barrel 423. The first cylinder barrel 421 communicates with the slewing base box body 6 through the first communication port, and the second cylinder barrel 423 communicates with the slewing base box body 6 through the second communication port. Part of the teeth of the gear 3 penetrate into the first cylinder barrel 421 through the first communication port, and part of the teeth of the gear 3 penetrate into the second cylinder barrel 423 through the second communication port.

[0028] Racks 41 are provided in both the first cylinder barrel 421 and the second cylinder barrel 423. The rack in the first cylinder barrel 421 is a first rack 411, and the rack in the second cylinder barrel 423 is a second rack 412. The first rack 411 is arranged in the middle of the first cylinder barrel 421. The first rack 411 meshes with part of the teeth of the gear 3 located in the first cylinder barrel 421. First pistons 422 are respectively and fixedly arranged at both ends of the first rack 411. The first pistons 422 are movably connected to the first cylinder barrel 421, enabling the first rack 411 to perform piston movement in the first cylinder barrel 421. The first pistons 422 at both ends of the first rack 411 divide both ends of the first cylinder barrel 421 into a first oil cylinder 7 and a second oil cylinder 8 respectively. A first oil cylinder oil port is provided on the first oil cylinder 7, and a second oil cylinder oil port is provided on the second oil cylinder 8.

[0029] The second rack 412 is arranged in the middle of the second cylinder barrel 423. The second rack 412 meshes with part of the teeth of the gear 3 located in the second cylinder barrel 423. Second pistons 424 are respectively and fixedly arranged at both ends of the second rack 412. The second pistons 424 are movably connected to the second cylinder barrel 423, enabling the second rack 412 to perform piston movement in the second cylinder barrel 423. The second pistons 424 at both ends of the second rack 412 divide both ends of the second cylinder barrel 423 into a third oil cylinder 9 and a fourth oil cylinder 10 respectively. A third oil cylinder oil port is provided on the third oil cylinder 9, and a fourth oil cylinder oil port is provided on the fourth oil cylinder 10. The third oil cylinder 9 and the first oil cylinder 7 are on the same side ( Figure 3 the left side in the figure), and the fourth oil cylinder 10 and the second oil cylinder 8 are on the same side ( Figure 3 the right side in the figure).

[0030] When the first oil cylinder oil port and the fourth oil cylinder oil port are used as the oil inlets, the second oil cylinder oil port and the third oil cylinder oil port are used as the oil outlets. When hydraulic oil is injected into the first oil cylinder 7 and the fourth oil cylinder 10 through the first oil cylinder oil port and the fourth oil cylinder oil port respectively, the hydraulic oil in the first oil cylinder 7 pushes the first piston 422, and the first piston 422 drives the first rack 411 to move towards the second oil cylinder 8. The hydraulic oil in the fourth oil cylinder 10 pushes the second piston 424, and the second piston 424 drives the second rack 412 to move towards the third oil cylinder 9. The moving directions of the first rack 411 and the second rack 412 are opposite. During the movement of the first rack 411 and the second rack 412, the gear 3 is driven to rotate clockwise, so that the gear shaft 2 can be controlled to rotate clockwise, and the gear shaft 2 then drives the rotating arm 52 to rotate clockwise, thus realizing the rotation of the rotating arm 52 and facilitating the transportation of wood.

[0031] When the second oil cylinder oil port and the third oil cylinder oil port are used as the oil inlets, the first oil cylinder oil port and the fourth oil cylinder oil port are used as the oil outlets. When hydraulic oil is injected into the second oil cylinder 8 and the third oil cylinder 9 through the second oil cylinder oil port and the third oil cylinder oil port respectively, the hydraulic oil in the second oil cylinder 8 pushes the first piston 422, and the first piston 422 drives the first rack 411 to move towards the first oil cylinder 7. The hydraulic oil in the third oil cylinder 9 pushes the second piston 424, and the second piston 424 drives the second rack 412 to move towards the fourth oil cylinder 10. The moving directions of the first rack 411 and the second rack 412 are opposite. During the movement of the first rack 411 and the second rack 412, the gear 3 is driven to rotate counterclockwise, so that the gear shaft 2 can be controlled to rotate counterclockwise, and the gear shaft 2 then drives the rotating arm 52 to rotate counterclockwise, thus realizing the rotation of the rotating arm 52 and facilitating the transportation of wood.

[0032] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A wood transport and log skidding arm rotation mechanism, characterized in that: It includes a slewing seat, a gear shaft, a gear, a driving mechanism and a skidding arm; The gear shaft is rotatably connected to the swivel seat; The gear is arranged on the gear shaft and is fixedly connected to the gear shaft; The driving mechanism is fixedly arranged on the swivel seat, and the driving mechanism comprises a rack and a driving assembly driving the rack to move, the rack is meshed with the gear, and the rack is fixedly connected to the driving assembly; The skidding arm is fixedly connected to the gear shaft.

2. A wood transport and skidding arm rotation mechanism according to claim 1, characterized in that: Two racks are provided, the two racks are arranged in parallel on opposite sides of the gear, and the two racks are respectively meshed with the gear.

3. A wood transport and skidding arm rotation mechanism according to claim 2, characterized in that: The driving assembly comprises a first oil cylinder barrel, a first piston, a second oil cylinder barrel and a second piston, and the two racks are respectively arranged in the first oil cylinder barrel and the second oil cylinder barrel; The first pistons are fixedly connected to both ends of the rack located in the first oil cylinder barrel, and the first pistons are movably connected to the first oil cylinder barrel; The second pistons are fixedly connected to both ends of the rack located in the second oil cylinder barrel, and the second pistons are movably connected to the second oil cylinder barrel; A first oil cylinder oil port is formed at one end of the first oil cylinder barrel, and a second oil cylinder oil port is formed at the other end; A third oil cylinder oil port is provided at one end of the second oil cylinder barrel, and a fourth oil cylinder oil port is provided at the other end.

4. A wood transport and skidding arm swivel mechanism according to claim 1, characterized in that: The skidding arm comprises a boom, a rotating arm and a telescopic cylinder. The boom is hingedly connected to the rotating arm, the rotating arm is fixedly connected to the gear shaft, one end of the telescopic cylinder is hingedly connected to the rotating arm, and the other end is hingedly connected to the boom.

5. The wood transport and skidding arm rotation mechanism according to claim 1, characterized in that: It also includes a copper sleeve, which is arranged between the gear shaft and the inner wall of the swivel seat.

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