Three-stage full-free gantry rubber tube pulley arrangement structure of forklift

Abstract

The application discloses a kind of rubber tube pulley arrangement structures of three-stage full free gantry of fork truck, it is related to fork truck production manufacturing technical field, including first pulley set fixed assembly, second pulley set fixed assembly, third pulley set fixed assembly, first rubber tube, first transition assembly, second rubber tube, third rubber tube, second transition assembly, fourth rubber tube, fifth rubber tube, third transition assembly, sixth rubber tube and fourth transition assembly;First pulley set fixed assembly and second pulley set fixed assembly are respectively fixedly connected in the upper crossbeam left and right sides of middle gantry, and third pulley set fixed assembly is fixedly connected in the telescopic end of front lifting oil cylinder;First rubber tube, first transition assembly, second rubber tube, third rubber tube, second transition assembly, fourth rubber tube, fifth rubber tube, third transition assembly, sixth rubber tube and fourth transition assembly form three groups of oil circuit passage.The application has the advantages that: layout is more reasonable, and vision is better.

Description

Technical Field

[0001] This invention relates to the field of forklift manufacturing technology, and in particular to a hose pulley block arrangement structure for a three-stage fully free mast of a forklift. Background Technology

[0002] Forklifts are becoming increasingly versatile, applicable to more varied and complex working conditions, and their functions are becoming more diversified and comprehensive. Simple single-function attachments can no longer meet market demands; attachments with three actions require three sets of hydraulic supply lines. Three-stage fully free masts are gaining popularity due to their high load capacity and low static height. However, the compact layout between the three-stage fully free mast and the vehicle body presents increasing challenges to the layout of the attachment's hydraulic lines. Currently, when a three-stage fully free mast is equipped with attachments with three actions, an additional hose reel is typically used for pipe installation. However, the hose reel restricts visibility and is costly.

[0003] Patent document CN104401909A discloses a five-piece valve piping arrangement structure for a three-stage fully free mast of a forklift, including piping line one, piping line two, and piping line three for parallel connection of the forklift multi-way valve and forklift attachments. Existing hose and pulley arrangement structures for three-stage fully free masts of forklifts have the following drawbacks: 1) Pipes two and three are arranged on the left and right sides of the mast, easily obstructing the view; 2) The first rubber wheel for mounting pipe one is positioned directly opposite the mast, and the first rubber hose bypassing the first rubber wheel occupies a relatively wide space in the left-right direction, easily obstructing the view; 3) The second rubber hose in pipe one, used to connect forklift attachments, passes through the side of the front lifting cylinder, easily obstructing the view; 4) The fixed right-angle joints and fixed octagonal joints of pipes one, two, and three are scattered, making maintenance inconvenient in confined spaces. Summary of the Invention

[0004] The technical problem to be solved by this invention is how to improve the field of vision of the hose pulley block arrangement structure of the three-level fully free mast of the forklift.

[0005] The present invention solves the above-mentioned technical problems through the following technical means: a hose and pulley block arrangement structure for a three-level fully free mast of a forklift, including a first pulley block fixing assembly, a second pulley block fixing assembly, a third pulley block fixing assembly, a first hose, a first transition assembly, a second hose, a third hose, a second transition assembly, a fourth hose, a fifth hose, a third transition assembly, a sixth hose, and a fourth transition assembly;

[0006] The first pulley block fixing assembly and the second pulley block fixing assembly are respectively fixedly connected to the left and right sides of the upper crossbeam of the middle gantry, and the third pulley block fixing assembly is fixedly connected to the telescopic end of the front lifting cylinder.

[0007] One end of the first hose is connected to the vehicle body multi-way valve, the middle part of the first hose passes around the first pulley group fixing assembly, and the other end of the first hose is connected to the first transition assembly, which is fixedly connected to the lower crossbeam of the inner mast; one end of the second hose is connected to the first transition assembly, the middle part of the second hose passes around the third pulley group fixing assembly, and the other end of the second hose is connected to the fourth transition assembly;

[0008] One end of the third hose is connected to the vehicle body multi-way valve, the middle part of the third hose passes around the second pulley assembly, and the other end of the third hose is connected to the second transition assembly, which is fixedly connected to the lower crossbeam of the inner mast; one end of the fourth hose is connected to the second transition assembly, the middle part of the fourth hose passes around the third pulley assembly, and the other end of the fourth hose is connected to the fourth transition assembly;

[0009] One end of the fifth hose is connected to the vehicle body multi-way valve, the middle part of the fifth hose passes around the second pulley group fixing assembly, and the other end of the fifth hose is connected to the third transition assembly, which is fixedly connected to the lower crossbeam of the inner mast; one end of the sixth hose is connected to the third transition assembly, the middle part of the sixth hose passes around the third pulley group fixing assembly, and the other end of the sixth hose is connected to the fourth transition assembly;

[0010] The fourth transition assembly is fixedly connected to the fork carriage, and the second hose, the fourth hose, and the sixth hose are respectively connected to the three oil inlets of the attachment through the fourth transition assembly.

[0011] This invention does not require modification of the vehicle or mast structural components. Furthermore, when installing the cab, windshield, or safety net, it does not require changing the position of the structural components or the size of the mast's front and rear tilt angles. Installation is quick and simple, and maintenance is convenient. The third and fifth hoses are arranged in parallel through the second pulley assembly, which is a more reasonable layout and provides better visibility compared to a separate arrangement.

[0012] Preferably, the first pulley block fixing assembly is inclinedly positioned behind the inner gantry. This provides a better field of vision compared to a configuration that faces the inner gantry directly.

[0013] Preferably, the position of the second pulley block fixing assembly corresponds to the inner side of the inner gantry.

[0014] Preferably, the second pulley assembly includes a large pulley and a small pulley disposed below the large pulley, the middle portion of the third hose passes around the large pulley, and the middle portion of the fifth hose passes around the small pulley.

[0015] Preferably, the third pulley assembly is located above the front lifting sprocket, and the first, second, third, fourth, fifth, and sixth hoses all pass over the front lifting chain. This provides better visibility compared to the hoses passing along the side of the front lifting cylinder.

[0016] Preferably, the second transition assembly and the third transition assembly share a fixed bracket and are fixedly connected to the lower crossbeam of the inner mast. Each of the second and third transition assemblies is a four-way assembly. The hose pulley arrangement structure of the forklift's three-stage fully free mast also includes a five-piece valve steel pipe transition assembly. The other end of the fifth hose is connected to the third transition assembly via the five-piece valve steel pipe transition assembly. The five-piece valve steel pipe transition assembly transitions the fifth hose to the outside of the third transition assembly, enabling the connection of multiple hoses in a confined space.

[0017] Preferably, the hose pulley block arrangement structure of the three-stage fully free mast of the forklift further includes a first hose clamp assembly and a second hose clamp assembly. The portion of the first hose located behind the first pulley block fixing assembly is fixedly connected to the outer mast through the first hose clamp assembly. The portions of the second hose and the fourth hose located behind the second pulley block fixing assembly are jointly fixedly connected to the outer mast through the second hose clamp assembly.

[0018] Preferably, the hose pulley block arrangement structure of the three-stage fully free mast of the forklift further includes a strapping strap. The portion of the first hose located behind the first pulley block fixing assembly is also strapped to the outer mast by the strapping strap. The portions of the second hose and the fourth hose located behind the second pulley block fixing assembly are also jointly strapped to the outer mast by the strapping strap.

[0019] Preferably, the first transition is a four-way assembly.

[0020] Preferably, the fourth transition assembly includes two six-way assemblies arranged side by side. This centralized arrangement of the fourth transition assembly allows for the centralized connection of the three sets of oil passages to the attachment, avoiding the inconvenience of maintenance in confined spaces caused by scattered connectors.

[0021] The advantages of this invention are:

[0022] 1. This invention does not require modification of the vehicle or mast structural components. Furthermore, when installing the cab, windshield, or safety net, it does not require changing the position of the structural components or the size of the mast's front and rear tilt angles. Installation is quick and simple, and maintenance is convenient. The third and fifth rubber hoses are fixed together by the second pulley group. Compared to arranging them separately on the left and right sides of the mast, the layout is more reasonable and provides better visibility.

[0023] 2. The first pulley block fixing assembly is inclinedly set behind the inner gantry, which provides a better field of vision compared to being arranged directly opposite the inner gantry.

[0024] 3. The first, second, third, fourth, fifth, and sixth hoses all pass over the front lifting chain, providing better visibility compared to hoses passing by the side of the front lifting cylinder.

[0025] 4. The fifth hose is transitioned to the outside of the third transition assembly via the five-piece valve steel pipe transition assembly, enabling the connection of multiple hoses in a confined space.

[0026] 5. The centralized arrangement of the fourth transition assembly enables the three sets of oil passages to be centrally connected to the attachments, avoiding the problem of inconvenient maintenance in a confined space caused by the scattered arrangement of joints. Attached Figure Description

[0027] Figure 1 This is a front view schematic diagram of the hose pulley block arrangement structure of the three-stage fully free mast of the forklift according to an embodiment of the present invention.

[0028] Figure 2 This is a rear view schematic diagram of the hose pulley block arrangement structure of the three-stage fully free mast of the forklift according to an embodiment of the present invention.

[0029] Figure 3 This is a top cross-sectional view of the hose pulley block arrangement structure of the three-stage fully free mast of the forklift according to an embodiment of the present invention.

[0030] Figure 4 This is a left cross-sectional view of the hose pulley block arrangement structure of the three-stage fully free mast of the forklift according to an embodiment of the present invention.

[0031] Figure 5 This is a partially enlarged schematic diagram of the first pulley block fixing assembly according to an embodiment of the present invention.

[0032] Figure 6 This is a right-side cross-sectional view of the hose pulley block arrangement structure of the three-stage fully free mast of the forklift according to an embodiment of the present invention.

[0033] Figure 7 This is a partially enlarged schematic diagram of the second pulley block fixing assembly according to an embodiment of the present invention.

[0034] Figure 8 This is a partially enlarged schematic diagram of the fixing assembly of the third pulley block in an embodiment of the present invention.

[0035] Figure 9 This is an isometric schematic diagram of the hose pulley block arrangement structure of an embodiment of the present invention, which is separated from the three-stage fully free mast of the forklift.

[0036] Figure 10This is a front view schematic diagram of the hose pulley block arrangement structure of an embodiment of the present invention, which is separated from the three-stage fully free mast of the forklift.

[0037] Figure 11 This is a rear view schematic diagram of the hose pulley block arrangement structure of an embodiment of the present invention, which is separated from the three-stage fully free mast of the forklift.

[0038] Figure 12 This is a left-side view of the hose pulley block arrangement structure of an embodiment of the present invention, which is separated from the three-stage fully free mast of the forklift. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0040] like Figures 1 to 3 As shown, the forklift's three-stage fully free mast includes an outer mast 1, a middle mast 2, an inner mast 3, a front lifting cylinder 4, a rear lifting cylinder 5, and a fork carriage 6. The outer mast 1 is fixedly connected to the front end of the forklift. The middle mast 2 is located inside the outer mast 1 and can slide up and down relative to the outer mast 1. The inner mast 3 is located inside the middle mast 2 and can slide up and down relative to the middle mast 2. The rear lifting cylinder 5 is fixedly connected to the outer mast 1. The extension and retraction of the rear lifting cylinder 5 can drive the middle mast 2 to rise and fall. At the same time, the rear lifting cylinder 5 can also drive the inner mast 3 to rise and fall through the rear lifting sprocket and rear lifting chain, thus realizing the lifting and lowering of the middle mast 2. The fork carriage 6 is raised and lowered synchronously with the inner mast 3; the rear of the fork carriage 6 is located inside the inner mast 3 and can slide up and down relative to the inner mast 3; the front of the fork carriage 6 is located in front of the outer mast 1, the middle mast 2 and the inner mast 3; the fork carriage 6 is equipped with a forklift attachment with three actions; the front lifting cylinder 4 is fixedly connected to the inner mast 3; the front lifting cylinder 4 can drive the fork carriage 6 to rise and fall through the front lifting sprocket and the front lifting chain; the three-stage fully free mast structure is common knowledge in the art, and is only briefly described here to illustrate the structure on which the hose pulley block arrangement structure of the three-stage fully free mast of the forklift of the present invention is applied.

[0041] like Figures 1 to 12As shown, this embodiment of the invention discloses a hose and pulley block arrangement structure for a three-stage fully free mast of a forklift, including a first pulley block fixing assembly 7, a second pulley block fixing assembly 8, a third pulley block fixing assembly 9, a first hose 10, a first transition assembly 11, a second hose 12, a third hose 13, a second transition assembly 14, a fourth hose 15, a fifth hose 16, a five-piece valve steel pipe transition assembly 17, a third transition assembly 18, a sixth hose 19, a fourth transition assembly 20, a first pipe clamp assembly 21, a second pipe clamp assembly 22, and a strapping 23.

[0042] The first pulley assembly 7 and the second pulley assembly 8 are respectively fixedly connected to the left and right sides of the upper crossbeam of the middle gantry 2; the first pulley assembly 7 is inclinedly arranged behind the inner gantry 3, which provides a better field of vision than being arranged directly opposite the inner gantry 3; the position of the second pulley assembly 8 corresponds to the inner side of the inner gantry 3, and the second pulley assembly 8 includes a large pulley and a small pulley arranged below the large pulley; the third pulley assembly 9 is fixedly connected to the telescopic end of the front lifting cylinder 4.

[0043] One end of the first hose 10 is connected to the multi-way valve of the vehicle body. The middle part of the first hose 10 passes around the first pulley assembly 7. The other end of the first hose 10 is connected to the first transition assembly 11, forming the first stage hose pulley assembly of the first set of oil passages. The first transition assembly 11 is fixedly connected to the lower crossbeam of the inner mast 3. The first transition assembly 11 is a four-way assembly. One end of the second hose 12 is connected to the first transition assembly 11. The middle part of the second hose 12 passes around the third pulley assembly 9. The other end of the second hose 12 is connected to the fourth transition assembly 20, forming the second stage hose pulley assembly of the first set of oil passages.

[0044] One end of the third hose 13 is connected to the multi-way valve of the vehicle body. The middle part of the third hose 13 passes around the large pulley of the second pulley assembly 8. The other end of the third hose 13 is connected to the second transition assembly 14, forming the first stage hose pulley group of the second set of oil passages. The second transition assembly 14 and the third transition assembly 18 share a fixed bracket and are fixedly connected to the lower crossbeam of the inner mast 3. The second transition assembly 14 and the third transition assembly 18 are each a four-way assembly. One end of the fourth hose 15 is connected to the second transition assembly 14. The middle part of the fourth hose 15 passes around the third pulley assembly 9. The other end of the fourth hose 15 is connected to the fourth transition assembly 20, forming the second stage hose pulley group of the second set of oil passages.

[0045] One end of the fifth hose 16 is connected to the multi-way valve of the vehicle body. The middle part of the fifth hose 16 passes around the small pulley of the second pulley group fixing assembly 8. The other end of the fifth hose 16 is connected to the third transition assembly 18 through the five-piece valve steel pipe transition assembly 17, forming the first stage hose pulley group of the third set of oil passages. The fifth hose 16 is transitioned to the outside of the third transition assembly 18 through the five-piece valve steel pipe transition assembly 17, realizing the connection of multiple sets of hoses in a narrow space. One end of the sixth hose 19 is connected to the third transition assembly 18. The middle part of the sixth hose 19 passes around the third pulley group fixing assembly 9. The other end of the sixth hose 19 is connected to the fourth transition assembly 20, forming the second stage hose pulley group of the third set of oil passages.

[0046] The third hose 13 and the fifth hose 16 are arranged side by side in the second pulley assembly 8. Compared with arranging them separately on the left and right sides of the gantry, the layout is more reasonable and the field of vision is better.

[0047] The third pulley assembly 9 is located above the front lifting sprocket. The first hose 10, the second hose 12, the third hose 13, the fourth hose 15, the fifth hose 16 and the sixth hose 19 all pass over the front lifting chain, providing a better field of vision compared to the hoses passing by the side of the front lifting cylinder.

[0048] The fourth transition assembly 20 is fixedly connected to the lower middle position of the fork carriage 6. The fourth transition assembly 20 includes two six-way assemblies arranged side by side. The second hose 12, the fourth hose 15 and the sixth hose 19 are respectively connected to the three oil inlets of the attachment through the fourth transition assembly 20. The centralized arrangement of the fourth transition assembly 20 realizes that the three sets of oil passages are centrally connected to the attachment, avoiding the problem of inconvenient maintenance in a small space caused by the scattered arrangement of joints.

[0049] The portion of the first hose 10 located behind the first pulley assembly 7 is fixedly connected to the outer gantry 1 via the first pipe clamp assembly 21. The first pipe clamp assembly 21 is pry-mounted onto the vertical channel steel of the outer gantry 1. The portion of the first hose 10 located behind the first pulley assembly 7 is also tied to the vertical channel steel of the outer gantry 1 via a strapping strap 23. The portions of the second hose 12 and the fourth hose 15 located behind the second pulley assembly 8 are jointly fixedly connected to the outer gantry 1 via the second pipe clamp assembly 22. The second pipe clamp assembly 22 is pry-mounted onto the upper crossbeam of the outer gantry 1. The portions of the second hose 12 and the fourth hose 15 located behind the second pulley assembly 8 are also jointly tied to the vertical channel steel of the outer gantry 1 via a strapping strap 23.

[0050] The overall layout of the three sets of oil passages is as follows:

[0051] The first set of oil circuit passages: high-pressure oil delivered by the multi-way valve → first hose 10 → first transition assembly 11 → second hose 12 → fourth transition assembly 20 → accessory oil inlet.

[0052] The second set of oil circuit passages: high-pressure oil delivered by the multi-way valve → third hose 13 → second transition assembly 14 → fourth hose 15 → fourth transition assembly 20 → accessory oil inlet.

[0053] The third set of oil circuit passages: high-pressure oil delivered by the multi-way valve → fifth hose 16 → five-piece valve steel pipe transition assembly 17 → third transition assembly 18 → sixth hose 19 → fourth transition assembly 20 → accessory oil inlet.

[0054] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hose pulley block arrangement structure for a three-stage fully free mast of a forklift, characterized in that: It includes a first pulley block fixing assembly, a second pulley block fixing assembly, a third pulley block fixing assembly, a first hose, a first transition assembly, a second hose, a third hose, a second transition assembly, a fourth hose, a fifth hose, a third transition assembly, a sixth hose, and a fourth transition assembly; The first pulley block fixing assembly and the second pulley block fixing assembly are respectively fixedly connected to the left and right sides of the upper crossbeam of the middle gantry, and the third pulley block fixing assembly is fixedly connected to the telescopic end of the front lifting cylinder. One end of the first hose is connected to the vehicle body multi-way valve, the middle part of the first hose passes around the first pulley group fixing assembly, and the other end of the first hose is connected to the first transition assembly, which is fixedly connected to the lower crossbeam of the inner mast; one end of the second hose is connected to the first transition assembly, the middle part of the second hose passes around the third pulley group fixing assembly, and the other end of the second hose is connected to the fourth transition assembly; One end of the third hose is connected to the vehicle body multi-way valve, the middle part of the third hose passes around the second pulley assembly, and the other end of the third hose is connected to the second transition assembly, which is fixedly connected to the lower crossbeam of the inner mast; one end of the fourth hose is connected to the second transition assembly, the middle part of the fourth hose passes around the third pulley assembly, and the other end of the fourth hose is connected to the fourth transition assembly; One end of the fifth hose is connected to the vehicle body multi-way valve, the middle part of the fifth hose passes around the second pulley group fixing assembly, and the other end of the fifth hose is connected to the third transition assembly, which is fixedly connected to the lower crossbeam of the inner mast; one end of the sixth hose is connected to the third transition assembly, the middle part of the sixth hose passes around the third pulley group fixing assembly, and the other end of the sixth hose is connected to the fourth transition assembly; The fourth transition assembly is fixedly connected to the fork carriage, and the second hose, the fourth hose and the sixth hose are respectively connected to the three oil inlets of the attachment through the fourth transition assembly; The second transition assembly and the third transition assembly share a fixed bracket and are fixedly connected to the lower crossbeam of the inner mast; the hose pulley arrangement structure of the three-stage fully free mast of the forklift also includes a five-valve steel pipe transition assembly, and the other end of the fifth hose is connected to the third transition assembly through the five-valve steel pipe transition assembly.

2. The hose pulley block arrangement structure of the three-stage fully free mast of a forklift as described in claim 1, characterized in that: The first pulley block fixing assembly is inclinedly positioned at the rear of the inner gantry.

3. The hose pulley block arrangement structure of the three-stage fully free mast of the forklift as described in claim 1, characterized in that: The position of the second pulley block fixing assembly corresponds to the inner side of the inner gantry.

4. The hose pulley block arrangement structure of the three-stage fully free mast of a forklift as described in claim 1, characterized in that: The second pulley assembly includes a large pulley and a small pulley disposed below the large pulley. The middle part of the third hose passes around the large pulley, and the middle part of the fifth hose passes around the small pulley.

5. The hose pulley block arrangement structure of the three-stage fully free mast of a forklift as described in claim 1, characterized in that: The third pulley assembly is located above the front lifting sprocket, and the first, second, third, fourth, fifth, and sixth hoses all pass over the front lifting chain.

6. The hose pulley block arrangement structure of the three-stage fully free mast of a forklift as described in claim 1, characterized in that: The second transition assembly and the third transition assembly are each a four-way assembly.

7. The hose pulley block arrangement structure of the three-stage fully free mast of a forklift as described in claim 1, characterized in that: The hose pulley block arrangement structure of the three-level fully free mast of the forklift also includes a first hose clamp assembly and a second hose clamp assembly. The portion of the first hose located behind the first pulley block fixing assembly is fixedly connected to the outer mast through the first hose clamp assembly. The portions of the second hose and the fourth hose located behind the second pulley block fixing assembly are jointly fixedly connected to the outer mast through the second hose clamp assembly.

8. The hose pulley block arrangement structure of the three-stage fully free mast of a forklift as described in claim 7, characterized in that: The hose pulley block arrangement structure of the three-level fully free mast of the forklift also includes a strapping strap. The portion of the first hose located behind the first pulley block fixed assembly is also strapped to the outer mast by the strapping strap. The portions of the second hose and the fourth hose located behind the second pulley block fixed assembly are also strapped to the outer mast by the strapping strap.

9. The hose pulley block arrangement structure of the three-stage fully free mast of a forklift as described in claim 1, characterized in that: The first transition assembly becomes a four-way assembly.

10. The hose pulley block arrangement structure of the three-stage fully free mast of a forklift as described in claim 1, characterized in that: The fourth transition assembly includes two six-way assemblies arranged side by side.

Images