Electric loader gearbox clutch structure

Abstract

The utility model relates to the technical field of engineering machinery, in particular to a gearbox clutch structure of an electric loader, which mainly comprises a box body, a sun gear with a central shaft arranged along the front-back direction is arranged in the box body, a gear ring is sleeved between the sun gear and the box body, and a plurality of planet gears are arranged between the sun gear and the front portion of the gear ring. A plurality of planet gears are rotationally installed on the planet carrier, each planet gear is meshed with the sun gear and the gear ring at the same time, a first-gear clutch is connected between the rear portion of the gear ring and the inner wall of the box body, a second-gear clutch is connected between the rear portion of the gear ring and the sun gear, and a first brake assembly capable of pushing the first-gear clutch to be combined or separated is arranged behind the first-gear clutch. A second brake assembly capable of pushing the second-gear clutch to be combined or separated is arranged behind the second-gear clutch. According to the device, the gearbox has a braking function, the structure of the gearbox is simpler, and the cost and the machining difficulty are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering machinery, in particular to a gearbox clutch structure of an electric loader. Background Art

[0002] Loaders are important mechanical equipment in engineering construction. They are mainly used for shoveling, loading, transporting and digging of loose materials. The operating conditions of loaders are mainly excavation and loading operations. The working device needs to collect the bucket, lift, unload and lower. The whole machine needs to brake frequently, but the current gearbox does not have a braking function and needs to be braked with the help of other tools. The structure is complex, and the cost and processing difficulty are greatly increased.

[0003] Based on the above problems, the utility model provides a gearbox clutch structure for an electric loader, which enables the gearbox to have a self-contained braking function, making the gearbox structure more streamlined, reducing costs and processing difficulty. Summary of the invention

[0004] The technical problem to be solved by the utility model is to design a gearbox clutch structure for an electric loader, which enables the gearbox to have a self-braking function, makes the gearbox structure more streamlined, and reduces costs and processing difficulty.

[0005] In order to solve the above technical problems, the electric loader gearbox clutch structure of the utility model includes a case body, a sun gear arranged along the front-to-back direction of the central axis is arranged in the case body, a gear ring is sleeved between the sun gear and the case body, a plurality of planetary gears are arranged between the sun gear and the front part of the gear ring, and the plurality of planetary gears are rotatably mounted on the planet carrier, and each planetary gear is meshed with the sun gear and the gear ring at the same time. Its structural feature is that a first-gear clutch is connected between the rear part of the gear ring and the inner wall of the case body, a second-gear clutch is connected between the rear part of the gear ring and the sun gear, a first brake assembly capable of pushing the first-gear clutch to engage or disengage is arranged behind the first-gear clutch, and a second brake assembly capable of pushing the second-gear clutch to engage or disengage is arranged behind the second-gear clutch.

[0006] With the above structure, the first brake assembly and the second brake assembly are used to push the first gear clutch and the second gear clutch to engage respectively, so that the entire planetary gear is locked with the housing, thereby realizing the braking function of the gearbox. The structural design is simple and the processing difficulty is reduced.

[0007] Preferably, the first brake assembly includes a first-gear piston that can move forward and backward, a first support block is arranged at the front side of the first-gear piston, a first-gear oil passage is formed between the first-gear piston and the first support block, and a rear side of the first-gear piston is connected to the housing through a first elastic assembly. When oil does not flow into the first-gear oil passage and the second-gear oil passage, the first elastic assembly pushes the first-gear piston forward, and the first-gear piston pushes the first-gear clutch forward to engage, thereby locking the housing and the gear ring.

[0008] Preferably, the second brake assembly includes a support assembly that can move forward and backward, a second-gear oil passage is formed between the support assembly and the first-gear piston, the outer ring of the middle part of the sun gear protrudes outward to form a boss, a return spring is arranged between the rear side wall of the boss and the front side wall of the support assembly, and the rear side of the support assembly is connected to the box body through a second elastic assembly. When oil does not flow into the first-gear oil passage and the second-gear oil passage, the second elastic assembly pushes the second support block forward, the second support block pushes the second-gear piston forward, and the second-gear piston pushes the second-gear clutch forward to engage, thereby locking the sun gear and the ring gear.

[0009] Preferably, when the first-gear piston moves forward, the front end of the first-gear piston abuts against the rear side of the first-gear clutch, the support assembly includes a second support block and a second-gear piston, the second-gear piston is sleeved on the second support block, and when the second-gear piston moves forward, the front end of the second-gear piston abuts against the rear side of the second-gear clutch. When the front end of the first-gear piston abuts against the rear side of the first-gear clutch, the first-gear clutch can be engaged, playing a role in locking the ring gear and the housing; when the front end of the second-gear piston abuts against the rear side of the second-gear clutch, the second-gear clutch can be engaged, playing a role in synchronously locking the sun gear and the ring gear.

[0010] Preferably, the first-gear piston comprises a piston component 1 located at the rear and a piston component 2 located at the front, the outer diameter of the piston component 1 is larger than the outer diameter of the piston component 2, the front side of the piston component 1 and the outer side of the piston component 2 form a groove, the first support block is arranged in the groove, the first support block is arranged behind the first-gear clutch, the outer side wall of the first-gear piston is movably connected to the inner side wall of the housing, the outer side wall of the first support block is fixedly connected to the inner side wall of the housing, the inner side wall of the first support block abuts against the outer side wall of the piston component 2, and a second-gear oil passage is formed between the front side wall of the piston component 1, the outer side wall of the piston component 2 and the rear side wall of the first support block. The setting of whether the first-gear oil passage is filled with oil is used to control whether the first-gear clutch is engaged or disengaged.

[0011] Preferably, the second support block includes a support portion at the rear and a connection portion at the front, the outer diameter of the support portion is larger than the outer diameter of the connection portion, the second piston component is arranged in front of the support portion and its inner side abuts against the outer side of the connection portion, the outer side wall of the support portion abuts against the inner side wall of the first piston component, an oil passage is formed between the front side wall of the support portion, the outer side wall of the connection portion and the rear side wall of the second piston component, and an oil inlet hole connected to the first oil passage is provided in the first gear piston. Whether the first gear oil passage is filled with oil is used to control whether the first gear clutch and the second gear clutch are engaged or separated.

[0012] Preferably, the first elastic component and the second elastic component are both installed inside the box body, an end cover is provided at the rear side of the box body, the front of the first elastic component is connected to the first gear piston, the front of the second elastic component is connected to the second support block, and the rear of the first elastic component and the second elastic component are both connected to the end cover. The arrangement of the first elastic component and the second elastic component plays a role in pushing the first gear piston or the second gear piston to move forward.

[0013] Preferably, the first elastic component and the second elastic component are both disc springs, which have compact axial space and good buffering and shock absorbing capabilities.

[0014] Preferably, the sun gear input end is coaxially connected to an input shaft, and the planet carrier output end is coaxially connected to an output shaft. Power is transmitted to the sun gear input end through the input shaft, and then transmitted from the planet carrier output end to the output shaft.

[0015] In summary, the beneficial effects of the present invention are:

[0016] The gearbox of the utility model has a self-braking function, the gearbox structure is more streamlined, and the cost and processing difficulty are greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0018] Figure 1 The utility model is a schematic structural diagram of a gearbox clutch structure of an electric loader.

[0019] In the figure: housing 1, sun gear 2, ring gear 3, planetary gear 4, planetary carrier 5, first gear clutch 6, second gear clutch 7, first brake assembly 8, second brake assembly 9, first gear piston 10, first support block 11, first gear oil passage 12, first elastic assembly 13, support assembly 14, second gear oil passage 15, boss 16, return spring 17, second elastic assembly 18, piston component 19, piston component 20, groove 21, second support block 22, second gear piston 23, support portion 24, connecting portion 25, oil inlet hole 26, end cover 27. DETAILED DESCRIPTION

[0020] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0021] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0022] The terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the feature. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0023] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0024] The following is a description of preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0025] Refer to the attached Figure 1 The utility model discloses a clutch structure of an electric loader gearbox. The overall structure of the structure includes a fixed case 1, in which a sun gear 2 is arranged along the front-rear direction of the central axis, a ring gear 3 is sleeved between the sun gear 2 and the case 1, a plurality of planetary gears 4 are arranged between the sun gear 2 and the front of the ring gear 3, and the plurality of planetary gears 4 are rotatably mounted on a planet carrier 5, each planetary gear 4 is meshed with the sun gear 2 and the ring gear 3 at the same time, an input end of the sun gear 2 is coaxially connected with an input shaft, and an output end of the planet carrier 5 is coaxially connected with an output shaft, a first-gear clutch 6 is connected between the rear of the ring gear 3 and the inner wall of the case 1, and a second-gear clutch 7 is connected between the rear of the ring gear 3 and the sun gear 2, the first-gear clutch 6 and the second-gear clutch 7 both include steel plates and friction plates arranged one by one, the first-gear clutch 6 and the second-gear clutch 7 arranged at the rear side are both steel plates, and a first brake assembly 8 that can promote its combination or separation is arranged behind the first-gear clutch 6, such as Figure 1As shown, the first brake assembly 8 includes a first-gear piston 10 that can move forward and backward, a first support block 11 is arranged on the front side of the first-gear piston 10, an oil passage 12 is formed between the first-gear piston 10 and the first support block 11, and the rear side of the first-gear piston 10 is connected to the box body 1 through a first elastic assembly 13.

[0026] As a further explanation of this embodiment, refer to the attached Figure 1 A second brake assembly 9 capable of pushing the second gear clutch 7 to engage or disengage is disposed at the rear of the second gear clutch 7. The second brake assembly 9 includes a support assembly 14 that can move forward and backward. A second gear oil passage 15 is formed between the support assembly 14 and the first gear piston 10. The outer ring of the middle portion of the sun gear 2 protrudes outward to form a boss 16. A return spring 17 is disposed between the rear side wall of the boss 16 and the front side wall of the support assembly 14. The rear side of the support assembly 14 is connected to the housing 1 through a second elastic assembly 18.

[0027] As a further explanation of this embodiment, refer to the attached Figure 1 When the first-gear piston 10 moves forward, the front end of the first-gear piston 10 abuts against the rear side of the first-gear clutch 6, and the first-gear clutch is engaged; the support assembly 14 includes a second support block 22 and a second-gear piston 23, and the second-gear piston 23 is sleeved on the second support block 22. When the second-gear piston 23 moves forward, the front end of the second-gear piston 23 abuts against the rear side of the second-gear clutch 7, and the second-gear clutch is engaged.

[0028] As a further explanation of this embodiment, refer to the attached Figure 1 The first-gear piston 10 includes a piston component 19 located at the rear and a piston component 20 located at the front. The outer diameter of the piston component 19 is larger than the outer diameter of the piston component 20. A groove 21 is formed on the front side of the piston component 19 and the outer side of the piston component 20. The first support block 11 is arranged in the groove 21. The first support block 11 is arranged behind the first-gear clutch 6. The outer wall of the first-gear piston 10 is movably connected to the inner wall of the box body 1. The outer wall of the first support block 11 is fixedly connected to the inner wall of the box body 1. The inner wall of the first support block 11 abuts against the outer wall of the piston component 20. A second-gear oil channel 15 is formed between the front side wall of the piston component 19, the outer wall of the piston component 20 and the rear side wall of the first support block 11.

[0029] As a further explanation of this embodiment, refer to the attached Figure 1 The second support block 22 includes a support portion 24 located at the rear and a connecting portion 25 located at the front. The outer diameter of the support portion 24 is larger than the outer diameter of the connecting portion 25. The piston component 20 is arranged in front of the support portion 24 and its inner side abuts against the outer side of the connecting portion 25. The outer wall of the support portion 24 abuts against the inner wall of the piston component 19. An oil blocking passage 12 is formed between the front side wall of the support portion 24, the outer side wall of the connecting portion 25 and the rear side wall of the piston component 20. An oil inlet hole 26 connected to the oil blocking passage 12 is opened in the first-block piston 10.

[0030] As a further explanation of this embodiment, refer to the attached Figure 1 The first elastic component 13 and the second elastic component 18 are both installed on the inner side of the box body 1, and an end cover 27 is provided on the rear side of the box body 1. The front part of the first elastic component 13 is connected to the first-gear piston 10, the front part of the second elastic component 18 is connected to the second support block 22, and the rear parts of the first elastic component 13 and the second elastic component 18 are both connected to the end cover 27. Preferably, the first elastic component 13 and the second elastic component 18 are both disc springs.

[0031] The working principle of the utility model is as follows:

[0032] When neither the first-gear oil passage 12 nor the second-gear oil passage 15 flows with oil, the first elastic component 13 pushes the first-gear piston 10 forward, and the first-gear piston 10 pushes the first-gear clutch 6 forward to engage, and the housing 1 and the ring gear 3 are locked; at the same time, the second elastic component 18 pushes the second support block 22 forward, and the second support block 22 pushes the second-gear piston 23 forward, and the second-gear piston 23 pushes the second-gear clutch 7 forward to engage, and the sun gear 2 and the ring gear 3 are locked, so that the entire planetary gear is locked with the housing 1 and is in a braking state.

[0033] When the first gear oil passage 12 is filled with oil and the second gear oil passage 15 is not filled with oil, the first gear clutch 6 is engaged by pushing the first gear piston 10 forward, so that the ring gear 3 and the housing 1 are locked, and the first gear piston 10 pushes the second support block 22 backward. Since the return spring 17 is compressed by the second support block 22 in the braking state, the second support block 22 moves backward. The elastic potential energy accumulated in the return spring 17 causes the second gear piston 23 to move backward, and the second gear clutch 7 is released. The sun gear 2 can rotate relative to the ring gear 3, and drive the planetary gear 4 to rotate, and the planetary carrier 5 is output, which is in the 1st gear deceleration state.

[0034] When the second gear oil passage 15 is filled with oil and the first gear oil passage 12 is not filled with oil, the first gear clutch 6 is released by pushing the first gear piston 10 backward, and the ring gear 3 can rotate relative to the housing 1; at the same time, the second elastic component 18 pushes the second gear piston 23 forward by pushing the second support block 22, so that the second gear clutch 7 is locked, the sun gear 2 and the ring gear 3 are locked synchronously, and the planetary carrier 5 is driven to output through the planetary gear 4. The output speed of the planetary gear 4 is equal to the input speed of the sun gear 2, and it is in the second gear state.

[0035] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A clutch structure for a gearbox of an electric loader, comprising a housing (1), wherein a sun gear (2) is arranged in the housing (1) with its central axis arranged in the front-rear direction, a ring gear (3) is sleeved between the sun gear (2) and the housing (1), a plurality of planetary gears (4) are arranged between the sun gear (2) and the front of the ring gear (3), the plurality of planetary gears (4) are rotatably mounted on a planet carrier (5), and each planetary gear (4) is meshed with the sun gear (2) and the ring gear (3) at the same time, characterized in that A first-gear clutch (6) is connected between the rear of the gear ring (3) and the inner wall of the housing (1), a second-gear clutch (7) is connected between the rear of the gear ring (3) and the sun gear (2), a first brake assembly (8) capable of pushing the first-gear clutch (6) to engage or disengage is arranged at the rear of the first-gear clutch (6), and a second brake assembly (9) capable of pushing the second-gear clutch (7) to engage or disengage is arranged at the rear of the second-gear clutch (7).

2. The electric loader gearbox clutch structure as claimed in claim 1, characterized in that The first brake assembly (8) comprises a first-gear piston (10) that can move forward and backward, a first support block (11) being arranged at the front side of the first-gear piston (10), an oil passage (12) being formed between the first-gear piston (10) and the first support block (11), and a rear side of the first-gear piston (10) being connected to the box body (1) via a first elastic assembly (13).

3. The electric loader gearbox clutch structure as claimed in claim 2, characterized in that The second brake assembly (9) comprises a support assembly (14) that can move forward and backward, a second gear oil passage (15) is formed between the support assembly (14) and the first gear piston (10), the middle outer ring of the sun gear (2) protrudes outward to form a boss (16), a return spring (17) is provided between the rear side wall of the boss (16) and the front side wall of the support assembly (14), and the rear side of the support assembly (14) is connected to the housing (1) via a second elastic assembly (18).

4. The electric loader gearbox clutch structure as claimed in claim 3, characterized in that When the first-gear piston (10) moves forward, the front end of the first-gear piston (10) abuts against the rear side of the first-gear clutch (6); the support assembly (14) comprises a second support block (22) and a second-gear piston (23); the second-gear piston (23) is sleeved on the second support block (22); when the second-gear piston (23) moves forward, the front end of the second-gear piston (23) abuts against the rear side of the second-gear clutch (7).

5. The electric loader gearbox clutch structure as claimed in claim 4, characterized in that The first-gear piston (10) comprises a piston component one (19) located at the rear and a piston component two (20) located at the front. The outer diameter of the piston component one (19) is larger than the outer diameter of the piston component two (20). A groove (21) is formed between the front side of the piston component one (19) and the outer side of the piston component two (20). The first support block (11) is arranged in the groove (21). The first support block (11) is arranged behind the first-gear clutch (6). The outer side wall of the first-gear piston (10) is movably connected to the inner side wall of the box body (1). The outer side wall of the first support block (11) is fixedly connected to the inner side wall of the box body (1). The inner side wall of the first support block (11) abuts against the outer side wall of the piston component two (20). A second-gear oil passage (15) is formed between the front side wall of the piston component one (19), the outer side wall of the piston component two (20) and the rear side wall of the first support block (11).

6. The electric loader gearbox clutch structure as claimed in claim 5, characterized in that The second support block (22) comprises a support portion (24) located at the rear and a connecting portion (25) located at the front, the outer diameter of the support portion (24) being larger than the outer diameter of the connecting portion (25), the second piston component (20) being arranged in front of the support portion (24) and the inner side thereof abutting against the outer side of the connecting portion (25), the outer side wall of the support portion (24) abutting against the inner side wall of the first piston component (19), an oil blocking passage (12) being formed between the front side wall of the support portion (24), the outer side wall of the connecting portion (25) and the rear side wall of the second piston component (20), and an oil inlet hole (26) communicating with the first blocking passage (12) being provided in the first blocking piston (10).

7. The electric loader gearbox clutch structure as claimed in claim 6, characterized in that The first elastic component (13) and the second elastic component (18) are both installed on the inner side of the box body (1); an end cover (27) is provided on the rear side of the box body (1); the front part of the first elastic component (13) is connected to a first-block piston (10); the front part of the second elastic component (18) is connected to a second support block (22); and the rear parts of the first elastic component (13) and the second elastic component (18) are both connected to the end cover (27).

8. The electric loader gearbox clutch structure as claimed in claim 7, characterized in that The first elastic component (13) and the second elastic component (18) are both disc springs.

9. The electric loader gearbox clutch structure as claimed in claim 8, characterized in that The input end of the sun gear (2) is coaxially connected to an input shaft, and the output end of the planet carrier (5) is coaxially connected to an output shaft.

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