Compact pulley structure

Abstract

The utility model relates to a compact pulley structure which comprises a mounting seat arranged on a door frame, a plurality of upper pulleys arranged on the mounting seat and a plurality of lower pulleys arranged on the mounting seat, and the lower pulleys are arranged on the two sides of the axis of the upper pulleys and are lower than the upper pulleys. The distance between the ends, away from each other, of the lower pulleys is equal to or larger than the minimum bending diameter of the oil way, and the shortest distance between the connecting pieces of the lower pulleys and the upper ends of the upper pulleys is equal to or larger than the minimum bending radius of the oil way. The upper pulley and the lower pulley are used for guiding the oil way, and the distance between the upper pulley and the connecting line of the axis of the lower pulley is larger than or equal to the minimum bending radius of the oil way, so that the height of the upper end of the upper pulley can be lower than the height of the upper end of the large pulley, and shielding of the sight of a driver is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of forklift pulleys, and in particular to a compact pulley structure. Background Art

[0002] The multi-stage mast of a forklift is driven by hydraulic cylinders during movement. The hydraulic cylinders need to be connected to the oil circuit when working normally. In order to keep the oil circuit within a stable limit when the mast of the forklift is moving, a large pulley is usually set on the mast, and the oil circuit is wound around the large pulley to limit the position of the oil circuit.

[0003] However, the large pulley is relatively large in size. When the driver is driving in the cab behind the gantry, the large pulley is located in the middle of the driver's field of vision, which blocks the driver's driving vision and affects safe driving.

[0004] Therefore, it is necessary to propose a new technical solution to solve the above problems. Utility Model Content

[0005] In order to reduce the volume of the structure guiding the oil circuit and reduce the impact on the driver's posture and field of vision, the present application provides a compact pulley structure.

[0006] The present application provides a compact pulley structure, which adopts the following technical solution:

[0007] A compact pulley structure comprises a mounting base arranged on a gantry, a plurality of upper pulleys arranged on the mounting base and a plurality of lower pulleys arranged on the mounting base, wherein the lower pulleys are arranged on both sides of the axis of the upper pulley and are arranged lower than the upper pulley, the spacing between the ends of the lower pulleys away from each other is equal to or greater than the minimum bending diameter of the oil circuit, and the shortest spacing between the connecting piece of the lower pulley and the upper end of the upper pulley is equal to or greater than the minimum bending radius of the oil circuit.

[0008] By adopting the above technical solution, the oil circuit is guided by the upper pulley and the lower pulley, and the distance between the upper pulley and the connecting line of the axis of the lower pulley is greater than or equal to the minimum bending radius of the oil circuit, so that the height of the upper end of the upper pulley can be lower than the height of the upper end of the large pulley, thereby reducing the obstruction of the driver's line of sight.

[0009] Optionally: the upper pulley and the lower pulley are both rotatably connected to the mounting base.

[0010] By adopting the above technical solution, when the oil circuit is displaced relative to the mounting seat, the oil circuit can be used to drive the upper pulley and the lower pulley to rotate, thereby reducing the friction between the upper pulley and the lower pulley, reducing the wear of the oil circuit, and thus increasing the service life of the oil circuit.

[0011] Optionally: baffles are coaxially fixed to both ends of the upper pulley and the lower pulley.

[0012] By adopting the above technical solution, the baffle can be used to stably mount the oil circuit on the upper pulley or the lower pulley when the oil circuit moves on the upper pulley and the lower pulley, so that the oil circuit will not directly generate friction with the mounting seat when the oil circuit moves relative to the mounting seat, thereby reducing the wear of the oil circuit and increasing the service life of the oil circuit.

[0013] Optionally: a retaining ring is coaxially fixed on the upper pulley and the lower pulley, and the retaining ring is arranged in the middle of the two baffles.

[0014] By adopting the above technical solution, the oil circuit wound on the upper pulley or the lower pulley is divided by a retaining ring, so that when the oil circuit is wound on the upper pulley or the lower pulley, it will not be squeezed directly in the direction of a baffle, thereby reducing the squeezing of the oil circuits with each other, making the oil circuit less likely to be affected by the delivery of hydraulic oil.

[0015] Optionally: the mounting seat includes mounting plates respectively arranged at both ends of the upper pulley and the lower pulley, and a connecting plate arranged above the mounting plates, the two ends of the connecting plate are respectively fixed to the mounting plates, and the connecting plate is arranged above the upper pulley.

[0016] By adopting the above technical solution, the connecting plate is used to limit the position of the oil circuit wound around the upper pulley, so that the oil circuit is not easy to detach from the upper pulley when passing through the upper pulley, and the oil circuit can be stably guided by the upper pulley.

[0017] Optionally: guide plates are respectively provided at the ends of the connecting plate on both sides of the upper pulley, and the guide plate is inclined downward at one end away from the connecting plate.

[0018] By adopting the above technical solution, the guide plate is used to cover the oil circuit at a certain position on the upper pulley, so that the objects will not be directly squeezed on the oil circuit. At the same time, the guide plate is tilted downward, so that the oil circuit can be protected to a certain extent while reducing the overall volume.

[0019] Optionally: a buffer plate arranged parallel to the connecting plate is further arranged at one end of the guide plate away from the connecting plate.

[0020] By adopting the above technical solution, the end surface of the guide plate away from the connecting plate will not directly face the oil circuit, so that when the oil circuit contacts the guide plate, the corners of the guide plate will not directly contact the oil circuit, making the oil circuit less susceptible to damage from the end of the guide plate.

[0021] Optionally: Chamfers are provided at two corners of the lower end of the mounting plate, and inclined surfaces are provided at two corners of the upper end of the mounting plate.

[0022] By adopting the above technical solution, the chamfering and the arrangement of the relief slope make it difficult for sharp parts to appear on the overall surface, and the overall volume is also reduced.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. A large pulley is replaced by an upper pulley and a lower pulley, thereby lowering the height of the upper pulley and reducing the obstruction of the driving vision;

[0025] 2. The position of the oil circuit is limited by the connecting plate so that the oil circuit wound around the upper pulley is not easily detached from the upper pulley, and the upper pulley can stably guide the movement of the oil circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram for showing the height of the large pulley and the upper pulley in an embodiment of the present application;

[0027] Figure 2 This is a schematic diagram for illustrating the structure of the mounting base according to an embodiment of the present application;

[0028] Figure 3 This is a schematic diagram for showing the positions of the upper pulley and the lower pulley according to an embodiment of the present application.

[0029] In the figure, 1. mounting seat; 11. mounting plate; 12. connecting plate; 13. guide plate; 14. buffer plate; 15. chamfer; 16. give-way slope; 17. fixing rod; 2. upper pulley; 21. baffle; 22. baffle ring; 3. lower pulley; 4. large pulley. DETAILED DESCRIPTION

[0030] The present application is further described in detail below in conjunction with the accompanying drawings.

[0031] The present application discloses a compact pulley structure, such as Figure 1 and Figure 2 As shown, it includes a mounting base 1 mounted on the gantry, an upper pulley 2 arranged on the mounting base 1, and two lower pulleys 3 arranged on the mounting base 1, and the two lower pulleys 3 are arranged below the upper pulley 2 and are respectively located on both sides of the axis of the upper pulley 2. The spacing between the side walls of the two lower pulleys 3 that are away from each other is equal to or greater than the minimum bending diameter of the oil circuit, and the shortest spacing between the connecting line of the axes of the two lower pulleys 3 and the upper end of the upper pulley 2 is equal to or greater than the minimum bending radius of the oil circuit, so that when the oil circuit bypasses from the side where the upper pulley 2 and the lower pulley 3 are away from each other, the oil circuit is not easy to break, and at the same time, the height of the upper end of the upper pulley 2 is lower than the height of the upper end of the large pulley 4, reducing the obstruction of the driver's line of sight.

[0032] The mounting seat 1 includes two mounting plates 11 arranged at both ends of the upper pulley 2 and the lower pulley 3, and a connecting plate 12 arranged above the two mounting plates 11. The ends of the upper pulley 2 and the lower pulley 3 are respectively rotatably connected to the mounting plates 11, and the lower ends of the two mounting plates 11 are installed on the door frame. The two ends of the connecting plate 12 are bent downward and respectively fixed to the mounting plates 11, so as to limit the upper end spacing of the two mounting plates 11. A fixing rod 17 is also installed between the two mounting plates 11, and the two ends of the fixing rod 17 are respectively connected to the mounting plates 11, and the fixing rod 17 is located below the upper pulley 2 and is on the same horizontal plane as the lower pulley 3. The connecting plate 12 is arranged above the upper pulley 2, and a gap for passing the oil circuit is arranged between the lower end of the connecting plate 12 and the upper end of the upper pulley 2. When the oil circuit passes between the connecting plate 12 and the upper pulley 2, the connecting plate 12 is used to limit the moving direction and position of the oil circuit, so that the oil circuit can stably bypass the upper pulley 2.

[0033] like Figure 3 As shown, baffles 21 are coaxially integrally formed on both ends of the upper pulley 2 and the lower pulley 3. The baffles 21 are disc-shaped, and the diameter of the baffles 21 is larger than the diameters of the upper pulley 2 and the lower pulley 3. When the oil circuit is wound around the upper pulley 2 and the lower pulley 3, the oil circuit is located between the baffles 21, so that when the oil circuit moves around the upper pulley 2 and the lower pulley 3, the oil circuit will not directly generate friction with the mounting plate 11, thereby reducing the wear of the oil circuit.

[0034] A retaining ring 22 is coaxially arranged in the middle of the upper pulley 2 and the lower pulley 3. The diameter of the retaining ring 22 is equal to the diameter of the baffle plate 21. The oil circuits are respectively arranged on both sides of the retaining ring 22, so that the oil circuits can be stably wound around the upper pulley 2 and the lower pulley 3, so that the oil circuits are not easily squeezed and accumulated on one side of the baffle plate 21, so that the use process of the oil circuit is not easily affected.

[0035] Since the oil circuit will move directly downward after passing over the upper pulley 2, in order to reduce the overall volume while the connecting plate 12 protects the oil circuit, guide plates 13 are integrally formed at the ends of the connecting plate 12 on both sides of the axis of the upper pulley 2. The end of the guide plate 13 away from the connecting plate 12 is inclined downward, so that the guide plate 13 is used to provide a certain degree of protection above the oil circuit and also reduces the overall volume.

[0036] Since the end of the guide plate 13 away from the connecting plate 12 is a plane, if the oil circuit directly contacts the end of the guide plate 13 away from the connecting plate 12, the oil circuit will be damaged by the pressure applied by the guide plate 13. Therefore, the end of the guide plate 13 away from the connecting plate 12 is also integrally formed with a buffer plate 14 parallel to the connecting plate 12, and the connection between the buffer plate 14 and the guide plate 13 is rounded, so that the buffer plate 14 is used to guide the movement of the oil circuit to a certain extent, so that the oil circuit will contact the rounded corner when contacting the guide plate 13, so that the oil circuit will not be damaged by the pressure applied by the end of the guide plate 13.

[0037] In order to further reduce the overall volume and also reduce the generation of sharp parts, arc-shaped chamfers 15 are provided at both corners of the lower end of the mounting plate 11, and inclined planes 16 similar to the guide plate 13 and the buffer plate 14 are provided at both corners of the upper end of the mounting plate 11. The inclined planes 16 are inclined at a section close to the connecting plate 12, and are horizontally arranged at a section away from the connecting plate 12. The chamfers 15 and the inclined planes 16 reduce the overall volume of the mounting plate 11, and also reduce the generation of sharp parts on the mounting plate 11.

[0038] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A compact pulley structure, characterized in that: The invention comprises a mounting seat (1) arranged on a gantry, a plurality of upper pulleys (2) arranged on the mounting seat (1), and a plurality of lower pulleys (3) arranged on the mounting seat (1); the lower pulleys (3) are arranged on both sides of the axis of the upper pulley (2) and are arranged lower than the upper pulley (2); the spacing between the ends of the lower pulleys (3) that are away from each other is equal to or greater than the minimum bending diameter of the oil circuit; and the shortest spacing between the connecting piece of the lower pulley (3) and the upper end of the upper pulley (2) is equal to or greater than the minimum bending radius of the oil circuit.

2. A compact pulley structure according to claim 1, characterized in that: The upper pulley (2) and the lower pulley (3) are both rotatably connected to the mounting base (1).

3. A compact pulley structure according to claim 1, characterized in that: Baffles (21) are coaxially fixed to both ends of the upper pulley (2) and the lower pulley (3).

4. A compact pulley structure according to claim 3, characterized in that: A retaining ring (22) is coaxially fixed on the upper pulley (2) and the lower pulley (3), and the retaining ring (22) is arranged in the middle of the two baffles (21).

5. A compact pulley structure according to claim 1, characterized in that: The mounting seat (1) comprises mounting plates (11) respectively arranged at both ends of the upper pulley (2) and the lower pulley (3), and a connecting plate (12) arranged above the mounting plate (11), the two ends of the connecting plate (12) being respectively fixed to the mounting plate (11), and the connecting plate (12) being arranged above the upper pulley (2).

6. A compact pulley structure according to claim 5, characterized in that: The ends of the connecting plate (12) located on both sides of the upper pulley (2) are respectively provided with guide plates (13), and one end of the guide plate (13) away from the connecting plate (12) is inclined downward.

7. A compact pulley structure according to claim 6, characterized in that: A buffer plate (14) arranged parallel to the connecting plate (12) is also arranged at one end of the guide plate (13) away from the connecting plate (12).

8. A compact pulley structure according to claim 5, characterized in that: Chamfers (15) are provided at two corners of the lower end of the mounting plate (11), and recessed inclined surfaces (16) are provided at two corners of the upper end of the mounting plate (11).

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