Forklift lifting cylinder mechanism

Abstract

The present application belongs to the field of fork truck, especially a fork truck lifting oil cylinder mechanism, aiming at the existing oil cylinder fixing structure which is generally gland type, belongs to rigid fixing, is not easy to adjust, has higher requirements for space and position, and is inconvenient for protecting and maintaining the oil cylinder, the present application proposes the following scheme, which comprises a lifting oil cylinder, a flexible fixing mechanism, a protection mechanism and an assembling mechanism, the outer side of the lifting oil cylinder is provided with a protective cover, the top of the lifting oil cylinder is connected with an assembling plate, one side of the assembling plate is in contact with a portal frame, the flexible fixing mechanism is located on the inner side of the protection mechanism, the assembling mechanism is used in cooperation with the protection mechanism, and the flexible fixing mechanism comprises a chain hanging plate, a U-shaped plate, a rubber pad and an oil cylinder clamp. The present application has the characteristics of flexible installation, space saving, soft fixing, simple adjustment, convenient protection of the oil cylinder and convenient maintenance of the oil cylinder.

Description

Technical Field

[0001] This invention relates to the field of forklift technology, and more particularly to a forklift lifting cylinder mechanism. Background Technology

[0002] Forklifts are industrial handling vehicles used for loading, unloading, stacking, and short-distance transport of palletized goods. They are widely used in ports, railway stations, airports, freight yards, factory workshops, warehouses, distribution centers, and logistics centers, and can handle the loading, unloading, and handling of palletized goods within ship holds, truck beds, and containers. In production workshops, forklifts are indispensable equipment.

[0003] Traditional hydraulic cylinder fixing structures are generally pressure-cap type, which are rigid and difficult to adjust. They have high requirements for space and position, and are not convenient for protecting the hydraulic cylinder. At the same time, it is not convenient to remove the hydraulic cylinder for maintenance. Therefore, a forklift lifting hydraulic cylinder mechanism is proposed to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies where the hydraulic cylinder fixing structure is generally a pressure cap type, which is rigidly fixed, difficult to adjust, has high requirements for space and position, and is inconvenient to protect the hydraulic cylinder and to remove the hydraulic cylinder for maintenance. Therefore, this invention proposes a forklift lifting hydraulic cylinder mechanism.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A forklift lifting cylinder mechanism includes a lifting cylinder, a flexible fixing mechanism, a protection mechanism, and an assembly mechanism. The protection mechanism includes a protective cover. The lifting cylinder is provided with a protective cover on its outer side. An assembly plate is connected to the top of the lifting cylinder. One side of the assembly plate contacts a mast. The flexible fixing mechanism is located inside the protection mechanism. The assembly mechanism works in conjunction with the protection mechanism.

[0007] Preferably, the flexible fixing mechanism includes a hanging chain plate, a U-shaped plate, a rubber pad, and a hydraulic cylinder clamp. The rubber pad is disposed on the inner side of the hydraulic cylinder clamp, and the hydraulic cylinder clamp abuts against the lifting hydraulic cylinder through the rubber pad. The inner side of the U-shaped plate abuts against the lifting hydraulic cylinder. The U-shaped plate and the hydraulic cylinder clamp are fixedly connected to the hanging chain plate by bolts. A frame is fixedly connected to the bottom of the assembly plate, and the bottom of the frame is fixedly connected to the hanging chain plate by bolts.

[0008] Preferably, the protection mechanism includes a limiting plate, one side of the gantry is in contact with the protective cover, the limiting plate is fixedly installed on one side of the protective cover, a limiting groove is formed on one side of the gantry, and the limiting plate slides in contact with the limiting groove.

[0009] Preferably, the assembly mechanism includes a short plate and a long plate. Side grooves are formed on the inner walls of both sides of the protective cover, and sliding grooves are formed on the bottom inner walls of the side grooves. The short plate and long plate are slidably installed in the two sliding grooves respectively. The bottom of the assembly plate has a short groove and a long groove, and the short plate and long plate are respectively engaged with the short groove and long groove. An adjustment hole is formed on one side of the long plate, and an adjustment shaft is rotatably installed in the adjustment hole. A bottom groove is formed on the bottom of the assembly plate, and a linkage plate is slidably installed in the bottom groove. An external thread is formed on the outer side of the adjustment shaft, and a screw hole is formed on one side of the linkage plate. The external thread on the adjustment shaft is threadedly connected to the screw hole. An upper plate and a... are fixedly connected to one side of the linkage plate. The lower plate has an upper groove on one side of the gantry, and the upper plate is engaged with the upper groove. The short plate has a lower groove on one side, and the lower plate is engaged with the lower groove. The inner wall of the top of the bottom groove has a driven hole, and a driven shaft is rotatably installed in the driven hole. A bevel gear one is fixedly sleeved on the outer side of the adjusting shaft, and a bevel gear two is fixedly connected to the bottom end of the driven shaft. The bevel gear one and bevel gear two mesh with each other. A transverse hole is opened on one side of the inner wall of the bottom groove, and a transverse plate is slidably installed in the transverse hole. A rack is fixedly connected to the front side of the transverse plate. A gear is fixedly sleeved on the outer side of the driven shaft, and the gear meshes with the rack. A transverse groove is opened on one side of the long plate, and the transverse plate is engaged with the transverse groove.

[0010] Preferably, the top of the limiting plate is in contact with the top inner wall of the limiting groove.

[0011] Preferably, an adapter hole is provided on one inner wall of a side groove, and one end of the adjusting shaft passes through the adapter hole.

[0012] Preferably, an upper hole is provided on one side of the inner wall of the bottom groove, and the upper plate is slidably installed in the upper hole.

[0013] Preferably, a lower hole is provided on one side of the inner wall of the bottom groove, and the lower plate is slidably installed in the lower hole.

[0014] The beneficial effects of this invention are:

[0015] The forklift lifting cylinder mechanism proposed in this invention features flexible installation, space saving, gentle fixation, and easy adjustment through a flexible fixing mechanism.

[0016] The present invention proposes a forklift lifting cylinder mechanism, which, through the setting of a protective mechanism, can place the lifting cylinder inside a protective cover, effectively protecting the lifting cylinder and improving its service life.

[0017] The present invention proposes a forklift lifting cylinder mechanism. Through the set assembly mechanism, by simply rotating the adjusting shaft, the linkage plate can drive the upper plate and the lower plate to move to the right, so that the upper plate and the lower plate move out of the upper groove and the lower groove respectively, and the horizontal plate can move out of the horizontal groove. This releases the limit on the assembly plate, making it easy to remove the assembly plate and thus facilitate the maintenance of the lifting cylinder on the assembly plate. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a forklift lifting cylinder mechanism proposed in this invention;

[0019] Figure 2 This is a cross-sectional view of a forklift lifting cylinder mechanism proposed in this invention.

[0020] Figure 3 for Figure 2 A schematic diagram of the structure of part A in the diagram;

[0021] Figure 4 for Figure 2 A structural diagram of part B in the diagram;

[0022] Figure 5 for Figure 2 A schematic diagram of the lifting cylinder section.

[0023] In the diagram: 1. Lifting cylinder; 2. Chain plate; 3. U-shaped plate; 4. Rubber pad; 5. Cylinder clamp; 6. Protective cover; 7. Gantry; 8. Limit plate; 9. Assembly plate; 10. Side groove; 11. Short plate; 12. Long plate; 13. Adjusting shaft; 14. Linkage plate; 15. Upper plate; 16. Lower plate; 17. Driven shaft; 18. Bevel gear one; 19. Bevel gear two; 20. Horizontal plate; 21. Gear; 22. Rack; 23. Upper groove; 24. Adapter hole; 25. Frame. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0025] Reference Figure 1-5 A forklift lifting cylinder mechanism includes a lifting cylinder 1, a flexible fixing mechanism, a protection mechanism, and an assembly mechanism. The protection mechanism includes a protective cover 6. The protective cover 6 is provided on the outside of the lifting cylinder 1. An assembly plate 9 is connected to the top of the lifting cylinder 1. A mast 7 is in contact with one side of the assembly plate 9. The flexible fixing mechanism is located inside the protection mechanism. The assembly mechanism and the protection mechanism are used in conjunction.

[0026] In this invention, the flexible fixing mechanism includes a hanging chain plate 2, a U-shaped plate 3, a rubber pad 4, and a hydraulic cylinder clamp 5. The rubber pad 4 is located on the inner side of the hydraulic cylinder clamp 5, and the hydraulic cylinder clamp 5 abuts against the lifting hydraulic cylinder 1 through the rubber pad 4. The inner side of the U-shaped plate 3 abuts against the lifting hydraulic cylinder 1. The U-shaped plate 3 and the hydraulic cylinder clamp 5 are fixedly connected to the hanging chain plate 2 by bolts. The bottom of the assembly plate 9 is fixedly connected to the frame 25, and the bottom of the frame 25 is fixedly connected to the hanging chain plate 2 by bolts. It has the characteristics of flexible installation, space saving, soft fixing, and easy adjustment.

[0027] In this invention, the protective mechanism includes a limiting plate 8. One side of the gantry 7 is in contact with the protective cover 6. The limiting plate 8 is fixedly installed on one side of the protective cover 6. A limiting groove is provided on one side of the gantry 7. The limiting plate 8 slides in contact with the limiting groove, so that the lifting cylinder 1 can be placed inside the protective cover 6, effectively protecting the lifting cylinder 1.

[0028] In this invention, the assembly mechanism includes a short plate 11 and a long plate 12. Side grooves 10 are formed on the inner walls of both sides of the protective cover 6, and sliding grooves are formed on the bottom inner walls of the side grooves 10. The short plate 11 and the long plate 12 are slidably installed in the two sliding grooves respectively. The bottom of the assembly plate 9 has a short groove and a long groove, and the short plate 11 and the long plate 12 are respectively engaged with the short groove and the long groove. An adjustment hole is formed on one side of the long plate 12, and an adjustment shaft 13 is rotatably installed in the adjustment hole. A bottom groove is formed on the bottom of the assembly plate 9, and a linkage plate 14 is slidably installed in the bottom groove. An external thread is formed on the outer side of the adjustment shaft 13, and a screw hole is formed on one side of the linkage plate 14. The external thread on the adjustment shaft 13 is threadedly connected to the screw hole. An upper plate 15 and a lower plate 16 are fixedly connected to one side of the linkage plate 14. An upper groove 23 is formed on one side of the gantry 7, and the upper plate 15 is engaged with the upper groove 23. The assembly plate 9 has a lower groove on one side of the short plate 11, and the lower plate 16 is engaged with the lower groove. A driven hole is provided on the inner wall of the top of the bottom groove, and a driven shaft 17 is rotatably installed in the driven hole. A bevel gear 18 is fixedly sleeved on the outer side of the adjusting shaft 13, and a bevel gear 29 is fixedly connected to the bottom end of the driven shaft 17. The bevel gear 18 and the bevel gear 29 mesh with each other. A transverse hole is provided on one side of the inner wall of the bottom groove, and a transverse plate 20 is slidably installed in the transverse hole. A rack 22 is fixedly connected to the front side of the transverse plate 20, and a gear 21 is fixedly sleeved on the outer side of the driven shaft 17. The gear 21 meshes with the rack 22. A transverse groove is provided on one side of the long plate 12, and the transverse plate 20 is engaged with the transverse groove. This facilitates the disassembly and assembly of the assembly plate 9. Only the adjusting shaft 13 needs to be rotated, which makes it easy to remove the lifting cylinder 1 on the assembly plate 9 for maintenance. This makes it convenient to use.

[0029] In this invention, the top of the limiting plate 8 contacts the top inner wall of the limiting groove, which can limit the gantry 7.

[0030] In this invention, an adapter hole 24 is provided on one inner wall of a side groove 10, and one end of an adjusting shaft 13 passes through the adapter hole 24. An upper hole is provided on one inner wall of a bottom groove, and an upper plate 15 is slidably installed in the upper hole to facilitate the movement of the upper plate 15. A lower hole is provided on one inner wall of a bottom groove, and a lower plate 16 is slidably installed in the lower hole to facilitate the movement of the lower plate 16.

[0031] In this invention, the flexible fixing mechanism provides flexible installation, saves space, provides gentle fixing, and is easy to adjust. The protective cover 6 allows the lifting cylinder 1 to be positioned inside the cover, effectively protecting it. When maintenance of the lifting cylinder 1 is required, rotating the adjusting shaft 13 connects the external thread on the adjusting shaft 13 to the threaded screw hole, causing the linkage plate 14 to move to the right. The linkage plate 14 then moves the upper plate 15 and the lower plate 16, allowing them to move out of the upper and lower slots respectively. Simultaneously, the adjusting shaft 13 drives the bevel gear 18 to... When rotated, bevel gear 18 drives bevel gear 29 to rotate, bevel gear 29 drives driven shaft 17 to rotate, driven shaft 17 drives gear 21 to rotate, gear 21 drives rack 22 to move, rack 22 drives cross plate 20 to move out of the transverse groove, and then the assembly plate 9 is pulled upward. The lifting cylinder 1 can be moved out of the protective cover 6 through the assembly plate 9, which is convenient for maintenance of the lifting cylinder 1. When needed, the lifting cylinder 1 is started, and the lifting cylinder 1 drives the assembly plate 9 to move upward. The assembly plate 9 can drive the short plate 11, long plate 12 and gantry 7 to move upward, which is convenient to use.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A forklift lifting cylinder mechanism comprising a lifting cylinder (1), a fixing mechanism, a protection mechanism and an assembling mechanism, characterized in that, The protection mechanism comprises a protection cover (6), the outer side of the lifting oil cylinder (1) is provided with the protection cover (6), the top of the lifting oil cylinder (1) is connected with an assembling plate (9), one side of the assembling plate (9) is in contact with a portal frame (7), the fixing mechanism is located on the inner side of the protection mechanism, the assembling mechanism is used in cooperation with the protection mechanism, the fixing mechanism comprises a hanging chain plate (2), a U-shaped plate (3), a rubber pad (4) and an oil cylinder clamp (5), the rubber pad (4) is arranged on the inner side of the oil cylinder clamp (5), the oil cylinder clamp (5) is in abutment with the lifting oil cylinder (1) through the rubber pad (4), the inner side of the U-shaped plate (3) is in abutment with the lifting oil cylinder (1), the U-shaped plate (3) and the oil cylinder clamp (5) are fixedly connected with the hanging chain plate (2) through bolts, the bottom of the assembling plate (9) is fixedly connected with a frame body (25), the bottom of the frame body (25) is fixedly connected with the hanging chain plate (2) through bolts, the protection mechanism comprises a limiting plate (8), one side of the portal frame (7) is in contact with the protection cover (6), the limiting plate (8) is fixedly installed on one side of the protection cover (6), one side of the portal frame (7) is provided with a limiting groove, the limiting plate (8) is in sliding contact with the limiting groove, the assembling mechanism comprises a short plate (11) and a long plate (12), the inner walls of the two sides of the protection cover (6) are both provided with a side groove (10), the bottom inner wall of the side groove (10) is provided with a sliding groove, the short plate (11) and the long plate (12) are respectively slidably installed in the two sliding grooves, the bottom of the assembling plate (9) is provided with a short groove and a long groove, the short plate (11) and the long plate (12) are respectively clamped with the short groove and the long groove, one side of the long plate (12) is provided with an adjusting hole, an adjusting shaft (13) is rotatably installed in the adjusting hole, the bottom of the assembling plate (9) is provided with a bottom groove, a linkage plate (14) is slidably installed in the bottom groove, the outer side of the adjusting shaft (13) is provided with an external thread, one side of the linkage plate (14) is provided with a screw hole, the external thread on the adjusting shaft (13) is in threaded connection with the screw hole, one side of the linkage plate (14) is fixedly connected with an upper plate (15) and a lower plate (16), one side of the portal frame (7) is provided with an upper groove (23), the upper plate (15) is clamped with the upper groove (23), one side of the short plate (11) is provided with a lower groove, the lower plate (16) is clamped with the lower groove, the top inner wall of the bottom groove is provided with a driven hole, a driven shaft (17) is rotatably installed in the driven hole, the outer side of the adjusting shaft (13) is fixedly provided with a bevel gear one (18), the bottom end of the driven shaft (17) is fixedly connected with a bevel gear two (19), the bevel gear one (18) is in meshing connection with the bevel gear two (19), the inner wall of one side of the bottom groove is provided with a horizontal hole, a horizontal plate (20) is slidably installed in the horizontal hole, the front side of the horizontal plate (20) is fixedly connected with a rack (22), the outer side of the driven shaft (17) is fixedly provided with a gear (21), the gear (21) is in meshing connection with the rack (22), one side of the long plate (12) is provided with a horizontal groove,The transverse plate (20) is clamped with a transverse groove.

2. The lift cylinder mechanism of a fork truck according to claim 1, wherein The top of the limiting plate (8) is in contact with the inner wall of the top of the limiting groove.

3. The lift cylinder mechanism for a fork truck according to claim 1, wherein An adaptive hole (24) is formed on the inner wall of one side of a side groove (10), and one end of the adjusting shaft (13) penetrates through the adaptive hole (24).

4. The lift cylinder mechanism for a fork truck according to claim 1, wherein An upper hole is formed on the inner wall of one side of the bottom groove, and the upper plate (15) is slidingly installed in the upper hole.

5. The lift cylinder mechanism for a fork truck according to claim 1, wherein, A lower hole is formed on the inner wall of one side of the bottom groove, and the lower plate (16) is slidingly installed in the lower hole.

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