Additional oil way device of attachment of forklift truck and forklift truck with attachment

Abstract

An additional oil way device of a forklift attachment comprises a control valve, the control valve is used for controlling the attachment to act, the attachment comprises a first support, a connecting arm set and a second support, the first support is connected with a portal of a forklift, and the second support is connected with a pallet fork; the two connecting arm groups are rotatably connected between the first bracket and the second bracket; and the control valve is positioned between the two connecting arm groups and is close to one side of the pallet fork. According to the additional oil way device, the position of the control valve is adjusted, so that the additional oil way device is more convenient to disassemble and assemble.

Description

Technical Field

[0001] The utility model relates to the field of forklifts, in particular to an additional oil circuit device of a forklift attachment and a forklift with the attachment. Background Art

[0002] The oil circuit structure of the forklift mast on the market includes a fork frame and a lifting assembly for lifting the fork frame. The fork frame is slidably connected to the lifting assembly. The lifting assembly is provided with an observation area for the operator to observe. The lifting assembly is provided with a number of oil pipes, and the oil pipes are located outside the observation area and on the side of the lifting assembly away from the fork frame. The lifting assembly includes a mast and a driving device located in the center of the mast, etc. The oil circuit is arranged along the outside of the mast.

[0003] Currently, for forklifts equipped with attachments, additional oil circuits are required to connect the attachment control valves. The attachment control valves are usually installed near the mast of the attachment, see Figure 5 Due to the limited space of the gantry, the control valve 1 is inconvenient to disassemble and maintain; if the additional oil circuit is connected to the control valve from the top of the drive device, the additional oil circuit will pass through the observation area, affecting the operator's field of vision. Utility Model Content

[0004] The main purpose of the utility model is to overcome the defect of the existing control valve being inconvenient to disassemble and assemble, and to provide an additional oil circuit device for a forklift attachment and a forklift with the attachment, and to adjust the installation position of the control valve to facilitate disassembly and assembly.

[0005] The utility model adopts the following technical solutions:

[0006] An additional oil circuit device for a forklift attachment includes a control valve, which is used to control the movement of the attachment. The attachment includes a first bracket, a connecting arm group and a second bracket, the first bracket is connected to the mast of the forklift, and the second bracket is connected to the fork; the two connecting arm groups are rotatably connected between the first bracket and the second bracket; it is characterized in that the control valve is located between the two connecting arm groups and close to one side of the fork.

[0007] Furthermore, it also includes an oil pipe group and a first positioning component, the first positioning component is fixed to the first bracket, one end of the oil pipe group is connected to the control valve, and the other end passes through the first positioning component.

[0008] Furthermore, the first positioning assembly includes a first fixing frame and a fixing block, the first fixing frame is fixedly connected to the first bracket, the fixing block is fixed to the first fixing frame and is provided with at least one through hole, and the oil pipe group is passed through the through hole.

[0009] Furthermore, the first positioning assembly also includes a first roller group, which is rotatably connected to the first fixing frame and is located on the side of the fixing block facing away from the control valve. The oil pipe group passes through the through hole and is wound around the first roller group.

[0010] Furthermore, a crossbeam is provided on the top of the first bracket, and the first positioning assembly is connected to the middle of the crossbeam.

[0011] Furthermore, it also includes a second positioning component, which is fixed to the top of the driving component used to drive the first bracket to rise and fall; after the other end of the oil pipe group passes through the first positioning component, it extends upward along the side of the driving component close to the first bracket and passes through the second positioning component, and then extends downward along the side of the driving component away from the first bracket to a position close to the bottom.

[0012] Furthermore, the second positioning assembly includes a second fixing frame and at least one second roller group, the second fixing frame is fixed to the top of the driving assembly; the second roller group is rotatably connected to the second fixing frame, and the oil pipe group is wound around the second roller group.

[0013] Furthermore, it includes three second roller groups, one of which is located on the side of the second fixing frame opposite to the attachment, another second roller group is located on the side of the second fixing frame away from the attachment, and the last second roller group is located between the other two second roller groups; the rotating axis of the second roller group is parallel to the rotating axis of the sprocket of the drive assembly.

[0014] Furthermore, the driving assembly includes a driving cylinder, a sprocket and a chain, the driving cylinder is connected to drive the sprocket to rise and fall, the chain is wrapped around the sprocket and connected to the attachment; the second positioning assembly is connected to the sprocket; the oil pipe group includes two oil pipes, and the two oil pipes are respectively located on both sides of the axial direction of the sprocket.

[0015] A forklift with an attachment comprises a forklift body and the attachment, and also comprises an additional oil circuit device of the forklift attachment.

[0016] From the above description of the utility model, it can be seen that compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. In the present invention, the attachment is a telescopic attachment, which includes a first bracket, a second bracket and two connecting arm groups. The control valve is fixed on the inner side of one of the connecting arm groups of the attachment and close to the side of the fork to facilitate the disassembly and maintenance of the control valve.

[0018] 2. In the present invention, a first positioning assembly is provided on the side of the attachment away from the fork, and a second positioning assembly is provided on the top of the driving assembly for driving the attachment to rise and fall; after the oil pipe group passes through the first positioning assembly, it extends upward along the side of the driving assembly close to the attachment and passes through the second positioning assembly, and then extends downward along the side of the driving assembly away from the attachment to a position near the bottom. With this oil circuit layout, the observation area on the mast is not occupied, the operator's field of vision is avoided from being affected, and the safety of work is improved.

[0019] 3. In the present invention, the first positioning assembly includes a first fixing frame, a fixing block and a first roller group. The fixing block is used to position the oil pipe group, and cooperates with the first roller group to play a guiding and pre-tightening role to prevent the oil pipe group from changing direction due to the movement of the accessories or being damaged during tensioning.

[0020] 4. In the present invention, the second positioning assembly includes a second fixing frame and a second roller assembly. The second roller assembly changes the direction of the oil pipe assembly so that the oil pipes of the oil pipe assembly are distributed around the driving assembly without occupying the observation area of the gantry. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the additional oil circuit layout diagram of the utility model (with accessories retracted);

[0022] Figure 2 This is a partial structural diagram of the additional oil circuit of the utility model;

[0023] Figure 3 This is the additional oil circuit layout diagram of the utility model (with accessories extended);

[0024] Figure 4 for Figure 3 The local structure diagram of

[0025] Figure 5 Installation location diagram for existing accessory control valves;

[0026] in:

[0027] 10. Oil pipe group; 20. Control valve; 30. First positioning assembly; 31. First fixing frame; 32. Fixing block; 33. First roller group; 40. Second positioning assembly; 41. Second fixing frame; 42. Second roller group; 50. Drive assembly; 51. Drive cylinder; 52. Sprocket; 53. Chain; 60. Accessories; 61. First bracket; 62. Second bracket; 63. Connecting arm group; 64. Telescopic drive structure; 70. Mast; 80. Fork. DETAILED DESCRIPTION

[0028] The present invention is further described below through specific implementation methods.

[0029] The terms "first" and "second" appearing in the present invention are only for the convenience of description to distinguish different components with the same name, and do not indicate a sequence or primary and secondary relationship.

[0030] In the description of the present invention, the directions or positional relationships indicated by “up”, “down”, “left”, “right”, “front” and “back” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention. They do not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention.

[0031] In this application, unless otherwise specified, "plurality" refers to two or more. "And / or" describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. The character " / " generally indicates that the related objects are in an "or" relationship.

[0032] See also Figures 1 to 4 An additional oil circuit device for a forklift attachment includes a control valve 20 for controlling the attachment's movement. The attachment 60 is a telescopic attachment and includes a first bracket 61, a second bracket 62, and two connecting arm assemblies 63. The first bracket 61 is slidably connected to the forklift's mast 70, allowing it to be raised and lowered relative to the mast 70. The second bracket 62 is connected to the forks 80. The two connecting arm assemblies 63 are rotatably connected between the first bracket 61 and the second bracket 62. The two connecting arm assemblies 63 can adopt a scissor-type structure, with the connecting arm assemblies 63 being driven to extend and retract by a telescopic drive structure 64. The chain 53 of the drive assembly 50 is connected to the first bracket 61 to drive it up and down. The control valve 20 is fixed to the inside of one of the connecting arm assemblies 63, located between the two connecting arm assemblies 63 and near the forks 80. Positioning the control valve 20 near the forks 80 on the attachment 60 facilitates assembly and disassembly and maintenance.

[0033] This embodiment also includes a hose assembly 10, a first positioning assembly 30, and a second positioning assembly 40. The attachment 60 is connected between the mast 70 and the fork 80. A control valve 20 is fixed to the attachment 60, controlling the movement of the attachment 60. In the figure, the attachment 60 includes a telescopic drive mechanism 64, and the control valve 20 controls the hydraulic circuit of the telescopic drive mechanism 64. The first positioning assembly 30 is fixed to the side of the attachment 60 away from the fork 80, while the second positioning assembly 40 is fixed to the top of the drive assembly 50, which drives the first bracket 61 upward and downward. The hose assembly 10 is connected to the control valve 20 at one end. The other end passes through the first positioning assembly 30, extends upward along the side of the drive assembly 50 near the first bracket 61, passes through the second positioning assembly 40, and then extends downward along the side of the drive assembly 50 away from the first bracket 61 to a position near the bottom. The first and second positioning assemblies 30 and 40 are provided to guide the layout of the hose assembly 10 so that it does not occupy the viewing area on the mast 70, thereby avoiding obstruction of the operator's field of view. The other end of the oil pipe assembly 10 can be connected to the hydraulic system of the forklift.

[0034] Specifically, the first positioning assembly 30 includes a first fixing bracket 31 and a fixing block 32. The first fixing bracket 31 is fixedly connected to the attachment 60. The fixing block 32 is fixed to the first fixing bracket 31 and is provided with at least one through-hole. The oil pipe assembly 10 is inserted through the through-hole, that is, the oil pipe assembly 10 is inserted from one end of the through-hole and exits from the other end. The fixing block 32 is provided to position the oil pipe assembly 10. When the attachment 60 is extended or retracted, the oil pipe assembly 10 is prevented from shifting between the control valve 20 and the first positioning assembly. The number of through-holes corresponds to the number of oil pipes in the oil pipe assembly 10, and can be one, two, or three, etc., without limitation herein.

[0035] Furthermore, the first positioning assembly 30 also includes a first roller assembly 33, which is rotatably connected to the first fixing bracket 31 and is located on the side of the fixing block 32 facing away from the control valve 20. The oil pipe assembly 10 passes through the through hole, wraps around the first roller assembly 33, and then extends upward along the side of the drive assembly 50 near the attachment 60. In other words, the first roller assembly 33 serves as a guide and pre-tensioning mechanism, preventing the oil pipe assembly 10 from changing direction or being damaged during tensioning due to the movement of the attachment 60. The first roller assembly 33 can be provided with at least one first roller, the number of which corresponds to the number of oil pipes in the oil pipe. The figure includes two first rollers, which are connected to both ends of a rotating shaft. The two oil pipes of the oil pipe assembly 10 are wrapped around corresponding first rollers.

[0036] The second positioning assembly 40 includes a second mounting bracket 41 and a second roller assembly 42. The second mounting bracket 41 is fixed to the top of the drive assembly 50. The second roller assembly 42 is rotatably connected to the second mounting bracket 41, and the oil pipe assembly 10 is wound around the second roller assembly 42. The second roller assembly 42 is provided to change the direction of the oil pipe assembly 10, so that the oil pipes of the oil pipe assembly 10 are distributed around the drive assembly 50 and do not occupy the observation area of the gantry 70.

[0037] Specifically, the drive assembly 50 includes a drive cylinder 51, a sprocket 52, and a chain 53. The sprocket 52 is located at the top of the drive cylinder 51 and is connected to the drive sprocket 52 for elevation. The chain 53 is wound around the sprocket 52 and connected to the attachment 60. When the sprocket 52 is raised or lowered, the chain 53 drives the attachment 60 up or down. The second fixing bracket 41 of the second positioning assembly 40 is connected to the sprocket 52. In the figure, the oil pipe assembly 10 includes two oil pipes, one located on either side of the sprocket 52 in the axial direction. That is, the oil pipe assembly 10 is positioned proximate to the side of the drive assembly 50.

[0038] The present invention includes at least one second roller assembly 42, which can be one, two, or three. Three are shown as an example. One second roller assembly 42 is located on the side of the second mounting bracket 41 facing the attachment 60, another second roller assembly 42 is located on the side of the second mounting bracket 41 away from the attachment 60, and the final second roller assembly 42 is located between the other two second rollers. In other words, the three second roller assemblies 42 are distributed circumferentially around the sprocket 52, with a gap between the second roller assembly 42 and the outer periphery of the sprocket 52. The number of second rollers on each second roller assembly 42 corresponds to the number of oil pipes in the oil pipe assembly 10. The rotation axes of the three second roller assemblies 42 are parallel to the rotation axis of the sprocket 52, and the rotation axis of the first roller assembly 33 is also parallel to the rotation axis of the sprocket 52.

[0039] Specifically, the first fixing frame 31 of the first positioning assembly is connected to the first bracket 61. A crossbeam is provided on the top of the first bracket 61, and the first fixing frame 31 of the first positioning assembly 30 is fixedly connected to the crossbeam and connected to the middle position of the crossbeam.

[0040] Based on this, the present invention further provides a forklift with an attachment, comprising a forklift body, an attachment, and an additional oil circuit device for the forklift attachment.

[0041] The above is only a specific implementation method of the present invention, but the design concept of the present invention is not limited to this. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. An additional oil circuit device for a forklift attachment, comprising a control valve for controlling the movement of the attachment, wherein the attachment comprises a first bracket, a connecting arm assembly, and a second bracket, wherein the first bracket is connected to the mast of the forklift, and the second bracket is connected to the fork of the forklift; the two connecting arm assemblies are rotatably connected between the first bracket and the second bracket; characterized in that: The control valve is located between the two connecting arm groups and close to one side of the fork.

2. The additional oil circuit device for a forklift attachment according to claim 1, characterized in that: It also includes an oil pipe group and a first positioning component. The first positioning component is fixed to the first bracket. One end of the oil pipe group is connected to the control valve, and the other end passes through the first positioning component.

3. The additional oil circuit device for a forklift attachment according to claim 2, characterized in that: The first positioning assembly includes a first fixing frame and a fixing block. The first fixing frame is fixedly connected to the first bracket. The fixing block is fixed to the first fixing frame and is provided with at least one through hole. The oil pipe group is passed through the through hole.

4. The additional oil circuit device for a forklift attachment according to claim 3, characterized in that: The first positioning assembly further includes a first roller assembly, which is rotatably connected to the first fixing frame and is located on a side of the fixing block facing away from the control valve. The oil pipe assembly passes through the through hole and is wound around the first roller assembly.

5. The additional oil circuit device for a forklift attachment according to claim 2, characterized in that: A crossbeam is provided on the top of the first bracket, and the first positioning component is connected to the middle of the crossbeam.

6. The additional oil circuit device for a forklift attachment according to claim 2, characterized in that: It also includes a second positioning assembly, which is fixed to the top of a driving assembly used to drive the first bracket to rise and fall; after the other end of the oil pipe group passes through the first positioning assembly, it extends upward along the side of the driving assembly close to the first bracket and passes through the second positioning assembly, and then extends downward along the side of the driving assembly away from the first bracket to a position close to the bottom.

7. The additional oil circuit device for a forklift attachment according to claim 6, characterized in that: The second positioning assembly includes a second fixing frame and at least one second roller group. The second fixing frame is fixed to the top of the driving assembly. The second roller group is rotatably connected to the second fixing frame. The oil pipe group is wound around the second roller group.

8. The additional oil circuit device for a forklift attachment according to claim 7, characterized in that: The invention comprises three second roller groups, one of which is located on the side of the second fixing frame opposite to the attachment, another second roller group is located on the side of the second fixing frame away from the attachment, and the last second roller group is located between the other two second roller groups; the rotating axis of the second roller group is parallel to the rotating axis of the sprocket of the drive assembly.

9. The additional oil circuit device for a forklift attachment according to claim 6, characterized in that: The driving assembly includes a driving cylinder, a sprocket and a chain. The driving cylinder is connected to drive the sprocket to rise and fall. The chain is wrapped around the sprocket and connected to the attachment. The second positioning assembly is connected to the sprocket. The oil pipe group includes two oil pipes, and the two oil pipes are respectively located on both sides of the axial direction of the sprocket.

10. A forklift with an attachment, comprising a forklift body and an attachment, characterized in that: It also includes an additional oil circuit device for a forklift attachment according to any one of claims 1 to 9.

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