Automatic planetary gear shifter of counterbalance forklift truck

Abstract

The utility model belongs to the technical field of planet gear shifters, and particularly discloses an automatic planet gear shifter of a counterbalance forklift truck, which comprises a shell, a planet carrier is arranged in the shell, a plurality of planet gear bodies are arranged in the planet carrier, shaft bodies are arranged in the plurality of planet gear bodies, and the plurality of shaft bodies are rotatably connected with the planet carrier. Two bearings are arranged between each planetary gear body and the shaft body, and cover plates are arranged at the two ends of each bearing; a plurality of cover plates are arranged at the top of the shaft body, a wear-resistant bushing is arranged between the bearing and the shaft body, oil injection holes are formed in the cover plates located at the top, and one end of each oil injection hole is communicated with an oil injection channel. The wear-resistant bushing, the spiral oil grooves, the oil injection holes and the oil injection channels are arranged, so that lubricating oil uniformly covers the surface of a part needing to be lubricated along a specific path; an oil film is formed to reduce friction and abrasion, and the effects of continuously and efficiently lubricating and prolonging the service life of parts are achieved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of planetary gear shifters, in particular to a planetary gear automatic shifter of a counterbalanced forklift. BACKGROUND

[0002] The planetary gear automatic shifter is a key device applied to a vehicle transmission system, especially to an industrial vehicle such as a counterbalanced forklift, which mainly comprises a planetary gear mechanism, a shift execution element, a control system and the like, and can automatically realize the change of gears according to the running conditions of the vehicle to meet different driving requirements.

[0003] When the forklift is in use, heavy load carrying, frequent starting and stopping and high-speed driving operations are required. From the aspect of lubrication, some planetary gear shifters only rely on the cooperation gap between the inner hole and the pin shaft for lubrication. This way can only provide a limited amount of lubricating oil. Under the conditions of heavy load and high speed, the relative speed between the inner hole of the planetary gear and the pin shaft is extremely fast, and the pressure per unit area is dramatically increased. It is difficult to form a continuous and stable lubricating oil film on the surface of the two by relying on gap lubrication, so that the metal surfaces are in direct contact, the friction increases sharply, and a large amount of heat is generated, which can cause serious wear and even ablation of the inner hole of the planetary gear and the pin shaft. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the above problems, the application provides a planetary gear automatic shifter of a counterbalanced forklift.

[0005] The planetary gear automatic shifter of the counterbalanced forklift provided by the application adopts the following technical scheme:

[0006] The planetary gear automatic shifter of the counterbalanced forklift comprises a shell, the inside of the shell is provided with a planet carrier, the inside of the planet carrier is provided with a plurality of planetary gear bodies, the inside of each planetary gear body is provided with a shaft body, and the plurality of shaft bodies are rotationally connected with the planet carrier;

[0007] Two bearings are arranged between each planetary gear body and the shaft body, and the two ends of each bearing are provided with a cover plate;

[0008] A wear-resistant bushing is arranged between the bearing and the shaft body, an oil injection hole is formed in the inside of each cover plate at the top, and an oil injection channel is arranged in communication with one end of each oil injection hole.

[0009] Through the above technical scheme, the design of the wear-resistant bushing, the spiral oil groove, the oil injection hole and the oil injection channel realizes that the lubricating oil uniformly covers the surface of the component to be lubricated along a specific path, forms an oil film to reduce friction and wear, achieves continuous and efficient lubrication, and prolongs the service life of the component.

[0010] Further, the interior of each wear-resistant bushing is provided with a spiral oil groove, and each spiral oil groove is in communication with a corresponding oil injection hole.

[0011] Further, the inner side of each cover plate is fixedly connected with a circular ring, the interior of the circular ring located at the top is provided with a circular hole, and each circular hole is in communication with a corresponding oil injection hole.

[0012] Further, the outer side of each cover plate is fixedly connected with two groups of radiating fins, and the number of each group of radiating fins is multiple.

[0013] Through the above technical scheme, the radiating fins can quickly absorb the heat generated by friction inside the gear shifter, and the heat is radiated and convected to reduce the temperature of the gear shifter, thereby ensuring the stable operation of the gear shifter.

[0014] Further, the opposite side of each two cover plates is fixedly connected with two groups of circular blocks, and the number of each group of circular blocks is multiple.

[0015] Further, the two ends of each bearing are provided with two groups of insertion holes, and the number of each group of insertion holes is multiple.

[0016] Further, each circular block is inserted into a corresponding insertion hole in an interference fit.

[0017] Through the above technical scheme, the circular blocks on the cover plates are inserted into the insertion holes at the two ends of the bearings in an interference fit, and the circular rings are arranged in the bearings, so that the cover plates and the bearings are reliably connected, the leakage of lubricating oil is prevented, and the stable transmission of the lubricating system and the power is ensured.

[0018] In summary, the present application has at least one of the following beneficial technical effects:

[0019] The present application realizes that the lubricating oil uniformly covers the surface of the lubricating component along a specific path, forms an oil film to reduce friction and wear, achieves continuous and efficient lubrication, and prolongs the service life of the component.

[0020] The present application realizes that the radiating fins can quickly absorb the heat generated by friction inside the gear shifter, and the heat is radiated and convected to reduce the temperature of the gear shifter, thereby ensuring the stable operation of the gear shifter.

[0021] The present application realizes that the circular blocks on the cover plates are inserted into the insertion holes at the two ends of the bearings in an interference fit, and the circular rings are arranged in the bearings, so that the cover plates and the bearings are reliably connected, the leakage of lubricating oil is prevented, and the stable transmission of the lubricating system and the power is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0023] Figure 2 It is the inside structure schematic view of the shell of the utility model;

[0024] Figure 3 It is the connection structure schematic view of the planetary gear body and the shaft body of the utility model;

[0025] Figure 4 It is the connection structure schematic view of the cover plate and the cooling fin of the utility model;

[0026] Figure 5 It is the sectional view of the utility model;

[0027] Figure 6 It is the sectional view of partial structure of the utility model.

[0028] The sign of the drawing is explained: 1, the shell; 2, the planet carrier; 3, the planetary gear body; 4, the shaft body; 5, spiral oil groove; 6, cover plate; 7, cooling fin; 8, oil injection hole; 9, oil injection channel; 10, circular ring; 11, round hole; 12, bearing; 13, wear-resistant bushing; 14, jack; 15, round block. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application; Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments, based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without doing creative work belong to the scope of protection of the present application.

[0030] Refer to Figures 1-6 A planetary gear automatic gear changer of counterbalance type forklift, including shell 1, the inside of shell 1 is equipped with planet carrier 2, the inside of planet carrier 2 is equipped with multiple planetary gear body 3, the inside of multiple planetary gear body 3 is equipped with shaft body 4, multiple shaft body 4 is rotatably connected with planet carrier 2;

[0031] Two bearings 12 are arranged between each planetary gear body 3 and shaft body 4, and two ends of each bearing 12 are provided with cover plate 6;

[0032] Wear-resistant bushing 13 is arranged between bearing 12 and shaft body 4, oil injection hole 8 is formed in the inside of multiple cover plates 6 located at the top, and oil injection channel 9 is arranged at one end of each oil injection hole 8.

[0033] When the forklift engine outputs power, the power is transmitted to the planetary carrier 2 or other related components of the planetary automatic gear shifter. A plurality of planetary gear bodies 3 rotate around the shaft body 4 inside the planetary carrier 2, and the shaft body 4 is rotationally connected with the planetary carrier 2, so that the planetary gear bodies 3 can rotate while revolving. This movement mode of the planetary gear is the basis for realizing different gear transmission ratios.

[0034] The wear-resistant bushing 13 arranged between the bearing 12 and the shaft body 4 further reduces the direct friction between the shaft body 4 and the bearing 12, and by injecting lubricating oil into the oil injection hole 8 (which can be manual or connected to an external lubricating pipe), the lubricating oil can flow along the oil injection channel 9 to the parts that need to be lubricated, such as the bearing 12, the wear-resistant bushing 13, and the mating surface of the planetary gear body 3 and the shaft body 4. The lubricating oil can form an oil film on the surface of these components, reducing the friction coefficient, reducing wear and heat, and also playing a certain role in heat dissipation and rust prevention.

[0035] With reference to Figures 4-6 The inside of each wear-resistant bushing 13 is provided with a spiral oil groove 5, and each spiral oil groove 5 is in communication with the corresponding oil injection hole 8. The inner side of each cover plate 6 is fixedly connected with a circular ring 10, and the inside of each circular ring 10 located at the top is provided with a circular hole 11, and each circular hole 11 is in communication with the corresponding oil injection hole 8.

[0036] When lubricating oil is injected from the oil injection hole 8, the lubricating oil first enters the inside of the circular ring 10 through the circular hole 11, and then flows to the wear-resistant bushing 13 through the oil injection channel 9. Since the spiral oil groove 5 is in communication with the oil injection hole 8, the lubricating oil will flow inside the wear-resistant bushing 13 along the spiral oil groove 5. The spiral shape of the spiral oil groove 5 can generate a certain centrifugal force during the flow of the lubricating oil, which helps the lubricating oil to be more evenly distributed on the inner surface of the wear-resistant bushing 13, and can continuously transport the lubricating oil to the contact surface between the shaft body 4 and the wear-resistant bushing 13 with the rotation of the planetary gear body 3, realizing continuous and uniform lubrication.

[0037] With reference to Figures 5-6 The outer side of each cover plate 6 is fixedly connected with two groups of heat dissipation fins 7, and the number of each group of heat dissipation fins 7 is multiple.

[0038] The heat dissipation fins 7 are connected with the cover plate 6 through heat conduction. When the planetary automatic gear shifter is working, the internal components such as the bearing 12 and the planetary gear body 3 will generate heat due to friction. These heat is transferred to the cover plate 6. Since the heat dissipation fins 7 have a large surface area and are usually made of materials with good heat conductivity, the heat on the cover plate 6 will be quickly conducted to the heat dissipation fins 7. Then, the heat dissipation fins 7 radiate heat to the surrounding air through heat radiation and convection, thereby achieving heat dissipation and cooling of the gear shifter.

[0039] With reference toFigures 1-6 Each two opposite sides of the cover plate 6 are fixedly connected with two groups of circular blocks 15, each group of circular blocks 15 is provided with a plurality of circular blocks 15, each bearing 12 is provided with two groups of insertion holes 14 at two ends, each group of insertion holes 14 is provided with a plurality of insertion holes 14, and each circular block 15 is inserted into the corresponding insertion hole 14 in an interference fit.

[0040] When installed, the circular block 15 is forcedly inserted into the insertion hole 14, and due to the interference, the circular block 15 generates a radial expansion force in the insertion hole 14, so that the cover plate 6 covers the two ends of the bearing 12, and at this time, the circular ring 10 is located in the inside of the bearing 12, further sealing the bearing 12, and avoiding the leakage of lubricating oil.

[0041] Working principle: when the counterbalanced forklift is started, the power output by the engine is transmitted to the planetary carrier 2 or related components of the planetary gear automatic transmission. The power drives the planetary carrier 2 to rotate, and the plurality of planetary gear bodies 3 revolve around the shaft body 4 inside the planetary carrier 2, and at the same time, the planetary gear bodies 3 rotate due to the rotation connection between the shaft body 4 and the planetary carrier 2, thereby realizing the switching of different gear transmission ratios.

[0042] In the assembly process, the wear-resistant bushing 13 is installed between the bearing 12 and the shaft body 4, and then the circular blocks 15 on the opposite side of the cover plate 6 are forcedly inserted into the insertion holes 14 at the two ends of the bearing 12 in an interference fit, and after installation is completed, the circular ring 10 inside the cover plate 6 is located in the inside of the bearing 12, which plays a sealing role and prevents the leakage of lubricating oil.

[0043] During use, lubricating oil is injected from the oil injection hole 8 of the top cover plate 6, and the lubricating oil enters the circular ring 10 through the circular hole 11, and then flows to the wear-resistant bushing 13 through the oil injection channel 9. Because the spiral oil groove 5 inside the wear-resistant bushing 13 is connected with the oil injection hole 8, and the spiral structure of the spiral oil groove 5 generates centrifugal force when the lubricating oil flows, the lubricating oil is uniformly distributed on the inner surface of the wear-resistant bushing 13, and rotates with the planetary gear body 3, and is continuously conveyed to the contact surface between the shaft body 4 and the wear-resistant bushing 13, thereby achieving sufficient lubrication.

[0044] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A planetary gear automatic shifter for a counterbalance forklift, characterized in that, include: The housing (1) has a planet carrier (2) inside, and a plurality of planetary gear bodies (3) are provided inside the planet carrier (2). Each of the plurality of planetary gear bodies (3) has a shaft (4) inside, and the plurality of shafts (4) are rotatably connected to the planet carrier (2). Two bearings (12) are provided between each planetary gear body (3) and shaft (4), and each bearing (12) has a cover plate (6) at both ends. A wear-resistant bushing (13) is provided between the bearing (12) and the shaft (4). The multiple cover plates (6) located at the top are provided with oil injection holes (8), and one end of each oil injection hole (8) is connected to an oil injection channel (9).

2. The planetary gear automatic shifter for a counterbalance forklift according to claim 1, characterized in that: Each wear-resistant bushing (13) has a spiral oil groove (5) inside, and each spiral oil groove (5) is connected to the corresponding oil injection hole (8).

3. The planetary gear automatic shifter for a counterbalance forklift according to claim 1, characterized in that: Each of the cover plates (6) has a ring (10) fixedly connected to its inner side. The rings (10) located at the top have holes (11) inside them. Each hole (11) is connected to the corresponding oil injection hole (8).

4. The planetary gear automatic shifter for a counterbalance forklift according to claim 1, characterized in that: Two sets of heat sinks (7) are fixedly connected to the outside of each cover plate (6), and the number of heat sinks (7) in each set is set to multiple.

5. The planetary gear automatic shifter for a counterbalance forklift according to claim 1, characterized in that: Two sets of circular blocks (15) are fixedly connected to each of the two cover plates (6) facing each other, and the number of circular blocks (15) in each set is set to multiple.

6. The planetary gear automatic shifter for a counterbalance forklift according to claim 5, characterized in that: Each bearing (12) has two sets of insertion holes (14) at both ends, and the number of insertion holes (14) in each set is set to multiple.

7. The planetary gear automatic shifter for a counterbalance forklift according to claim 6, characterized in that: Each of the circular blocks (15) is interference-fitted to the corresponding socket (14).

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