Forklift clutch hydraulic booster

Abstract

The utility model discloses a forklift clutch hydraulic booster which comprises an oil cylinder shell, the oil cylinder shell is through in the front-back direction, a power assisting device is arranged in the oil cylinder shell, the power assisting device mainly comprises an oil return structure and a power assisting shaft which are both arranged in the oil cylinder shell, and first thread grooves are formed in the front portion and the rear portion of the inner wall of the oil cylinder shell. A first guide sleeve and a second guide sleeve are in threaded connection with the interiors of the first threaded grooves in the front portion and the rear portion respectively, a driving shaft is inserted into the first guide sleeve, a power-assisted shaft is inserted into the second guide sleeve, and a second threaded groove and a third threaded groove are formed in the close sides of the power-assisted shaft and the driving shaft respectively. The utility model has the advantages that: a hydraulic system is adopted, the transmission ratio is larger, and hydraulic oil hardly has compressibility, so that the transmission effect is more stable. Compared with a traditional mechanical clutch booster, a driver does not need to apply too large treading force in the operation process; even if the oil cylinder is stored for a long time, the hydraulic oil can still keep enough pressure in the oil cylinder shell.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of clutch booster, concretely refers to a forklift clutch hydraulic booster. BACKGROUND

[0002] Forklift, as the key equipment in the industrial handling field, is mainly used for the loading and unloading, stacking and short distance transportation of pallet goods. With its fork lifting device, maneuverability and high efficiency, forklift is widely used in warehouses, ports and other places. In the gear shifting operation, the clutch pedal is stepped, the booster on the forklift is assisted, the pressure plate is separated from the clutch plate, and gear shifting is realized.

[0003] The existing forklifts mostly adopt pneumatic clutch boosters or mechanical clutch boosters, but there are certain defects in the existing solutions and technologies.

[0004] When the pneumatic clutch booster is adopted: when the forklift is parked for a long time or has a fault leading to insufficient gas source, the gas pressure cannot effectively drive the displacement of the pressure plate, so that the pressure plate cannot be separated from the clutch plate, and the vehicle is difficult to start. The traditional solution needs to manually rotate the engine to a specific position to separate the pressure plate and the clutch, but this process is not only complicated and difficult to operate, but also has great safety hazards, so it is urgent to improve the safety and convenience of operation.

[0005] When the mechanical clutch booster is adopted, since it mainly relies on the lever principle to transmit and amplify the force, this design is often not up to the task when dealing with forklifts that require large clutch force. Specifically, when the forklift requires high clutch force, the mechanical booster may not be able to effectively amplify the input force of the driver, resulting in the need for the driver to exert greater pedaling force during operation. This deficiency not only makes the driver feel tired, but also increases the degree of fatigue, affecting the operation efficiency and driving comfort.

[0006] Therefore, there is an urgent need for a new clutch booster to solve the above problems.

[0007] The information disclosed in this BACKGROUND section is only intended to increase an understanding of the general background of the present utility model and is not intended to be a recognition or a suggestion that this information forms a prior art that is already known in the art. CONTENT OF THE UTILITY MODEL

[0008] The technical problem to be solved by the utility model is to overcome the above problems, and provide a forklift clutch hydraulic booster.

[0009] To solve the above technical problems, the utility model provides a technical scheme: a forklift clutch hydraulic booster, comprising:

[0010] The cylinder housing is continuous from front to back;

[0011] The power assist device mainly includes a return oil structure and a power assist shaft, both of which are located inside the cylinder housing. By injecting hydraulic oil into the cylinder housing, the oil pressure and oil volume in the return oil structure are changed, thereby driving the power assist shaft to move.

[0012] Preferably, the inner wall of the cylinder housing has a threaded groove 1 on both the front and rear sides, and a guide sleeve 1 and a guide sleeve 2 are threadedly connected in the threaded groove 1 on the front and rear sides respectively. A drive shaft is inserted into the guide sleeve 1, and an auxiliary shaft is inserted into the guide sleeve 2. Threaded groove 2 and threaded groove 3 are respectively opened on the adjacent sides of the auxiliary shaft and the drive shaft.

[0013] Preferably, the oil return structure is disposed between the drive shaft and the booster shaft, and the oil return structure mainly includes an oil return valve core and an external threaded sleeve, wherein the external threaded sleeve is threadedly connected to the threaded groove of the booster shaft.

[0014] The return valve core includes a connecting shaft located inside an external threaded sleeve. The front and rear ends of the connecting shaft are respectively fixedly connected to a valve core connecting block and a valve disc. The outer wall of the valve core connecting block is provided with a threaded portion and is threadedly connected to the threaded groove three of the drive shaft. The rear end of the valve disc and the rear wall of the threaded groove two are connected to each other by a shock-absorbing spring.

[0015] Preferably, the outer wall of the power shaft has several bypass oil passages 1 that communicate with the threaded groove 2, and the front end of the external threaded sleeve is fixedly connected to a piston fixing nut that communicates with its inner wall. The outer wall of the piston fixing nut has a bypass oil passage 2 that communicates with it. Through the bypass oil passage 1, the external threaded sleeve, and the bypass oil passage 2 on the piston fixing nut, a stable oil circuit connection system is formed.

[0016] Preferably, a smooth portion is provided on the outer wall of the external threaded sleeve, and an annular piston is fixedly connected to the outer wall of the smooth portion. The outer wall of the piston and the inner wall of the cylinder housing are tightly fitted, so that the piston divides the cylinder housing into two independent inner cavities.

[0017] Preferably, the front and rear portions of the top of the cylinder housing are respectively connected by an oil return pipe and an oil inlet pipe.

[0018] Preferably, a plurality of internally threaded sleeves for fixing are fixedly connected to both sides of the cylinder housing.

[0019] The advantages of this utility model compared with the prior art are as follows:

[0020] This invention introduces a hydraulic system. Because hydraulic oil is not easily compressed, hydraulic transmission exhibits more stable performance, thus significantly improving the reliability and stability of the system. At the same time, even after long-term storage, the hydraulic oil can maintain sufficient pressure inside the cylinder housing, ensuring that users can easily and conveniently separate the pressure plate from the clutch plate at any time, thus avoiding the need for manual reset and further enhancing the ease of use and operational safety of the equipment.

[0021] Meanwhile, compared to traditional mechanical clutch boosters, hydraulic transmissions have a larger gear ratio, allowing drivers to operate the clutch without applying excessive pedal force. This advantage not only reduces the driver's physical burden and operational fatigue but also improves work efficiency and driving comfort.

[0022] By improving the hydraulic system, optimizing the structural design, optimizing the return oil structure, stabilizing the oil circuit connection system, enhancing sealing performance, facilitating the design of inlet and return oil pipes, and simplifying installation, the operational safety, convenience, and system reliability of the forklift clutch have been significantly improved. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a perspective view of the present invention.

[0025] Figure 2 This is a structural diagram of the present invention.

[0026] Figure 3 This is a perspective view of the cylinder housing in this utility model.

[0027] Figure 4 This is a structural diagram of the cylinder housing in this utility model.

[0028] Figure 5 This is a perspective view of some of the devices in this utility model.

[0029] Figure 6 This is a structural diagram of some of the devices in this utility model.

[0030] Figure 7 These are exploded views of part of this utility model.

[0031] Figure 8 This is a schematic diagram of the oil return structure in this utility model.

[0032] As shown in the figure: 1. Cylinder housing; 2. Oil return structure; 3. Power steering shaft; 4. Guide sleeve one; 5. Guide sleeve two; 6. Drive shaft; 7. Oil return valve core; 8. External threaded sleeve; 9. Connecting shaft; 10. Valve core connecting block; 11. Valve disc; 12. Shock-absorbing spring; 13. Bypass oil passage one; 14. Piston fixing nut; 15. Bypass oil passage two; 16. Piston; 17. Oil return pipe; 18. Oil inlet pipe; 19. Installing internal threaded sleeve. Detailed Implementation

[0033] The following will refer to the appendix in the embodiments of this utility model. Figure 1 To the attached Figure 8 As shown, the technical solutions in the embodiments of this utility model are clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0034] Example 1:

[0035] Please pay close attention. Figures 1 to 2 As shown, this utility model provides a forklift clutch hydraulic booster, mainly comprising: a cylinder housing 1 and a booster device. The cylinder housing 1 is cylindrical and extends through the front and rear. The booster device mainly includes a return oil structure 2 and a booster shaft 3, both of which are disposed inside the cylinder housing 1.

[0036] Therefore, in the specific implementation process of this embodiment, hydraulic oil is injected into the cylinder housing 1 to push the power assist shaft 3 to move, thereby realizing the power assist operation of the forklift clutch.

[0037] Example 2:

[0038] The description of the cylinder housing 1 in Embodiment 1 is further defined to ensure stable operation of the equipment. Please refer to the following description carefully. Figures 1 to 4 As shown in Embodiment 2, threaded grooves are opened on the front and rear parts of the inner wall of the cylinder housing 1. The front threaded groove 1 is threadedly connected to the guide sleeve 4, and the drive shaft 6 is inserted into the inner wall of the guide sleeve 4. The rear threaded groove 1 is threadedly connected to the guide sleeve 2 5, and the power shaft 3 is inserted into the guide sleeve 2 5. In addition, annular oil felts to prevent oil leakage are fixedly connected to the inner walls of the guide sleeve 1 4 and the guide sleeve 2 5, respectively, for use with the drive shaft 6 and the power shaft 3. At the same time, threaded grooves 2 and 3 are opened on the adjacent sides of the power shaft 3 and the drive shaft 6, respectively. It should be noted that the threaded groove 2 has a threaded groove only on the front part of the inner wall, and the rear part of the inner wall is a smooth part. The oil return structure 2 in Embodiment 1 is set between the drive shaft 6 and the power shaft 3, and the drive shaft 6 and the power shaft 3 are connected through the oil return structure 2.

[0039] In addition, a return oil pipe 17 and an inlet oil pipe 18 are respectively connected to the front and rear parts of the top of the cylinder housing 1, which can recover and input hydraulic oil into the cylinder housing 1.

[0040] Finally, several threaded sleeves 19 for fixing are fixedly connected to both sides of the cylinder housing 1. In use, the threaded sleeves 19 can be connected to the corresponding threaded bolts to fix the cylinder housing 1 to other equipment of the forklift.

[0041] Thus, in the specific implementation of this second embodiment, hydraulic oil is injected into the cylinder housing 1 through the oil inlet pipe 18. During the injection process, the pressure in the corresponding area changes, and the pressure in the corresponding area inside the cylinder housing 1 gradually changes. This, in turn, drives the power steering shaft 3 to move.

[0042] Example 3:

[0043] To further clarify and fully explain the oil return structure 2 in Embodiments 1 and 2 above, this utility model also provides Embodiment 3, which you should pay close attention to. Figures 4 to 8 As shown, in this second embodiment, the oil return structure 2 mainly includes an oil return valve core 7 and an external threaded sleeve 8, which is threadedly connected to the threaded groove 2 of the booster shaft 3.

[0044] The outer wall of the external threaded sleeve 8 is provided with a smooth part, and an annular piston 16 is fixedly connected to the outer wall of the smooth part. The outer wall of the piston 16 is tightly fitted with the inner wall of the cylinder housing 1. The front end of the external threaded sleeve 8 is fixedly connected to a piston fixing nut 14 that communicates with its inner wall. Through the cooperation of the piston fixing nut 14 and the power assist shaft 3, the piston 16 can be effectively limited. In this way, the piston 16 divides the cylinder housing 1 into two independent inner cavities. Even if hydraulic oil is injected, the presence of the piston 16 will not cause hydraulic oil leakage.

[0045] Example 4:

[0046] To further clarify and fully explain the operating principle of the return valve core 7 and the return structure 2 in Embodiment 3 above, this utility model also provides Embodiment 4, which you should carefully review. Figures 5 to 8As shown, the aforementioned return valve core 7 includes a connecting shaft 9 located inside an external threaded sleeve 8. The front and rear ends of the connecting shaft 9 are respectively fixedly connected to a valve core connecting block 10 and a valve disc 11. The outer wall of the valve core connecting block 10 is provided with a threaded portion and is threadedly connected to the threaded groove three of the drive shaft 6. The valve disc 11 is located in the threaded groove two, and an annular sealing ring is fixedly connected to the outer wall of the valve disc 11. Its outer wall fits against the inner wall of the threaded groove two of the power steering shaft 3. Furthermore, the rear end of the valve disc 11 and the rear wall of the threaded groove two are connected to each other by a shock-absorbing spring 12, which reduces the impact of vibration during the forklift's movement and provides return capability.

[0047] At the same time, the outer wall of the power shaft 3 has several bypass oil passages 13 that are connected to the threaded groove 2, and the outer wall of the piston fixing nut 14 has a bypass oil passage 2 15 that is connected to it. Through the bypass oil passages 13, the external threaded sleeve 8 and the bypass oil passage 2 15 on the piston fixing nut 14, a stable oil circuit connection system is formed.

[0048] Example 5:

[0049] Finally, threaded connectors are fixedly connected to the opposite ends of the drive shaft 6 and the auxiliary shaft 3 to facilitate equipment fixation.

[0050] Based on Embodiments 1 to 5 and in conjunction with existing technology, the operation procedure of this utility model is as follows: The equipment is placed in the corresponding forklift, and the cylinder housing 1 is securely fixed to other equipment on the forklift using bolts installed on the internally threaded sleeve 19. The drive shaft 6 is connected to the clutch pedal via a connecting seat, and the power steering shaft 3 is connected to the pressure plate.

[0051] The input oil pipe and return oil pipe on the forklift's oil tank are fixedly connected to the inlet oil pipe 18 and the return oil pipe 17, respectively. Then, the input oil pipe continuously inputs hydraulic oil into the cylinder housing 1 through the inlet oil pipe 18. Since the piston 16 is in contact with the inner wall of the cylinder housing 1, the hydraulic oil can only flow into the area in front of the piston 16 through the oil circuit connection system formed by the bypass oil passage 13, the external threaded sleeve 8, and the bypass oil passage 2 15 in sequence. Then, it flows back into the forklift's oil tank through the return oil pipe 17. At this time, due to the flow of hydraulic oil, the pressure in the areas in front of and behind the piston 16 is the same.

[0052] When stationary, the pressure plate and clutch are engaged. When it is necessary to separate the pressure plate and clutch for gear shifting, the clutch pedal is depressed. The clutch pedal pulls the drive shaft 6 forward, simultaneously moving the return valve core 7. At this time, the valve disc 11 on the return valve core 7 also moves forward. When the annular sealing ring on the valve disc 11 blocks the bypass oil passage 13, the hydraulic oil cannot enter the area in front of the piston 16 through the oil circuit connection system. At this time, the hydraulic oil is blocked in the area behind the piston 16. The prolonged blockage leads to an increase in pressure, which in turn pushes the piston 16 forward. Since the piston 16 is limited by the piston fixing nut 14 and the power assist shaft 3, the piston 16 can drive the power assist shaft 3 to move together through the piston fixing nut 14 and the external threaded sleeve 8. Finally, the power assist shaft 3 drives the pressure plate to move together, thus separating the pressure plate and clutch, making it convenient for the user to perform gear shifting.

[0053] Finally, it should be noted that the return valve core 7 and other key components are all made of high-strength steel and precision-machined.

[0054] In summary, the forklift clutch hydraulic booster provided by this utility model has at least the following advantages:

[0055] It uses liquid transmission, which uses a hydraulic system to transmit and amplify force, so the driver does not need to apply excessive pedaling force during operation.

[0056] Utilizing the nearly incompressible nature of hydraulic oil, a more stable transmission effect is provided. Simultaneously, the hydraulic oil maintains sufficient pressure within the cylinder housing even after prolonged inactivity, making the disengagement of the pressure plate and clutch plate more immediate and convenient when the vehicle is not running and under the same force without power assist, eliminating the tediousness and safety hazards of manual reset.

[0057] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

[0058] The detailed description of known functions and components is omitted in this disclosure. To ensure the compatibility of the equipment, the operating methods used are consistent with the parameters of commercially available instruments.

Claims

1. A hydraulic booster for forklift clutch, characterized in that, include: The cylinder housing (1) is open at both ends; The power assist device mainly includes a return oil structure (2) and a power assist shaft (3), both of which are located inside the cylinder housing (1). By injecting hydraulic oil into the cylinder housing (1), the oil pressure and oil volume in the return oil structure (2) are changed, thereby driving the power assist shaft (3) to move.

2. The forklift clutch hydraulic booster according to claim 1, characterized in that: The inner wall of the cylinder housing (1) has a threaded groove 1 on both the front and rear sides. The threaded groove 1 on the front and rear sides is threadedly connected to a guide sleeve 1 (4) and a guide sleeve 2 (5). A drive shaft (6) is inserted into the guide sleeve 1 (4). The auxiliary shaft (3) is inserted into the guide sleeve 2 (5). The auxiliary shaft (3) and the drive shaft (6) have a threaded groove 2 and a threaded groove 3 on their adjacent sides, respectively.

3. A forklift clutch hydraulic booster according to claim 2, characterized in that: The oil return structure (2) is located between the drive shaft (6) and the power assist shaft (3). The oil return structure (2) mainly includes an oil return valve core (7) and an external threaded sleeve (8). The external threaded sleeve (8) is threadedly connected to the threaded groove of the power assist shaft (3). The return valve core (7) includes a connecting shaft (9) located inside the external threaded sleeve (8). The front and rear ends of the connecting shaft (9) are respectively fixedly connected to a valve core connecting block (10) and a valve disc (11). The outer wall of the valve core connecting block (10) is provided with a threaded part and is threadedly connected to the threaded groove three of the drive shaft (6). The rear end of the valve disc (11) and the rear wall of the threaded groove two are connected to each other by a shock-absorbing spring (12).

4. A forklift clutch hydraulic booster according to claim 3, characterized in that: The outer wall of the power shaft (3) has several bypass oil passages (13) that communicate with the threaded groove. The front end of the external threaded sleeve (8) is fixedly connected to a piston fixing nut (14) that communicates with its inner wall. The outer wall of the piston fixing nut (14) has a bypass oil passage (15) that communicates with it. The bypass oil passages (13), the external threaded sleeve (8), and the bypass oil passages (15) on the piston fixing nut (14) together form a stable oil circuit connection system.

5. A forklift clutch hydraulic booster according to claim 4, characterized in that: The outer wall of the external threaded sleeve (8) is provided with a smooth part, and an annular piston (16) is fixedly connected to the outer wall of the smooth part. The outer wall of the piston (16) and the inner wall of the cylinder housing (1) are closely fitted, so that the piston (16) divides the cylinder housing (1) into two independent inner cavities.

6. A forklift clutch hydraulic booster according to any one of claims 1 to 5, characterized in that: The front and rear parts of the top of the cylinder housing (1) are respectively connected by a return oil pipe (17) and an inlet oil pipe (18).

7. A forklift clutch hydraulic booster according to claim 6, characterized in that: Several threaded sleeves (19) for fixing are fixedly connected to both sides of the cylinder housing (1).

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