Large-torque heavy-load speed reducer gear shifting structure

Abstract

The utility model discloses a gear shifting structure of a large-torque heavy-load speed reducer. The gear shifting structure comprises a speed reducer box body and a hollow shaft rotationally arranged in the speed reducer box body, the front portion and the rear portion of the hollow shaft are rotationally sleeved with a large gear and a small gear respectively, and the middle of the hollow shaft is slidably sleeved with a gear ring. Gear shifting outer teeth are arranged on the outer sides of the two ends of the gear ring, a first extension ring is formed in the center of the end, close to the gear ring, of the large gear, inner teeth matched with the gear shifting outer teeth are arranged on the inner side of the first extension ring, and a second extension ring is formed in the center of the end, close to the gear ring, of the small gear. The inner side of the second extension ring is also provided with inner teeth matched with the gear shifting outer teeth. The gear ring is poked front and back, and the gear shifting outer teeth at the two ends of the gear ring can be engaged with the inner teeth of the first extension ring and the inner teeth of the second extension ring correspondingly. On the basis of keeping the gear shifting performance, the gear ring body type can be reduced, the arrangement space of internal parts is optimized, and the cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of speed reducer technology, and in particular to a shifting structure for a high-torque heavy-duty speed reducer. Background Technology

[0002] Currently, heavy-duty speed reducers are widely used in modern mechanical transmission, especially in low-speed, high-torque applications, and are widely used in industries such as hoisting and coal mining. A typical high-torque heavy-duty speed reducer's shifting structure consists of gears, a gear ring, and an adjusting ring. Currently, conventional high-torque heavy-duty speed reducers have a relatively large internal space in their shifting housing. The gear ring, which uses a shift lever to achieve shifting, has internal teeth, while the corresponding meshing gear has external teeth. This results in a relatively large gear ring design, leading to a crowded internal component layout and a large overall volume. When the housing space is limited and there are many internal components, assembly within the confined space becomes impossible, thus limiting the application scenarios and increasing costs. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a shifting structure for a high-torque heavy-duty reducer. While maintaining shifting performance, it can reduce the size of the gear ring, optimize the internal parts layout space, and reduce costs.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0005] A high-torque heavy-duty reducer shifting structure includes a reducer housing and a hollow shaft rotatably disposed within the reducer housing.

[0006] The hollow shaft is rotatably fitted with a large gear and a small gear at its front and rear ends, respectively, and a gear ring is slidably fitted in the middle of the hollow shaft.

[0007] The gear ring has shifting external teeth on both outer sides. The large gear has a first extension ring formed in the center of one end near the gear ring. The inner side of the first extension ring has internal teeth that are adapted to the shifting external teeth. The small gear has a second extension ring formed in the center of one end near the gear ring. The inner side of the second extension ring also has internal teeth that are adapted to the shifting external teeth.

[0008] By shifting the gear ring back and forth, the external teeth at both ends of the gear ring can mesh with the internal teeth of the first extension ring and the second extension ring, respectively.

[0009] Furthermore, the hollow shaft has an external toothed section formed in the middle, and the inner side of the gear ring has internal teeth that are adapted to the external toothed section. The gear ring is slidably engaged with the external toothed section through the internal teeth.

[0010] Furthermore, both the inner ring of the large gear and the inner ring of the small gear are assembled with the hollow shaft via deep groove ball bearings.

[0011] Furthermore, an oil supply ring is also fitted on the hollow shaft near the deep groove ball bearing.

[0012] Furthermore, the hollow shaft has lubricating oil passages connected to the oil supply ring on both the inside and outside.

[0013] Furthermore, a gear shaft is rotatably mounted inside the reducer housing, and the toothed section of the gear shaft meshes with a large gear;

[0014] The gear shaft is also provided with a transmission gear, which meshes with a pinion.

[0015] Furthermore, the upper part of the reducer housing is also provided with a shift lever suitable for controlling the sliding of the gear ring.

[0016] Furthermore, the front end of the gear shaft extends out of the reducer housing, and the rear end of the hollow shaft extends out of the reducer housing.

[0017] By adopting the above technical solution, this utility model has the following beneficial effects:

[0018] 1. This utility model utilizes a sliding meshing gear ring mounted on a hollow shaft, along with a rotating large gear and a small gear. This design allows the gear ring to engage with the large and small gears respectively during forward and backward shifting, enabling gear shifting between different speed ratios. Furthermore, unlike traditional structures, the shifting teeth are located on the outer sides of both ends of the gear ring. Extended rings are also designed at the ends of the large and small gears near the gear ring, allowing the shifting teeth at both ends to mesh with the inner teeth of these extended rings, thus achieving gear shifting. This design maintains shifting performance while reducing the size of the gear ring, optimizing the internal component layout, resulting in a compact structure, reduced costs, and consequently, a smaller overall size and weight, saving on housing and component material costs.

[0019] 2. Compared with the traditional heavy-duty reducer shifting structure, the shifting structure of this utility model has lower requirements for the internal space of the gearbox, and can be assembled in a gearbox with limited internal space, ensuring effective shifting and stable operation. It has a wider range of applications and can be used in more scenarios.

[0020] 3. This utility model, through the design of lubrication channels and oil supply rings on the hollow shaft, can achieve regular lubrication of the deep groove ball bearing, reduce friction, and ensure the long-term stable operation of the heavy-duty reducer. Attached Figure Description

[0021] Figure 1 This is a schematic cross-sectional view of the internal structure of an embodiment of the present utility model;

[0022] Figure 2 for Figure 1 Enlarged structural diagram of section A in the middle;

[0023] Among them, 1. Gearbox housing; 2. Hollow shaft; 20. External gear section; 200. Lubricating oil passage; 3. Large gear; 30. First extension ring; 4. Small gear; 40. Second extension ring; 5. Gear ring; 50. Shift external gear; 6. Deep groove ball bearing; 7. Oil supply ring; 8. Gear shaft; 80. Transmission gear; 9. Shift lever. Detailed Implementation

[0024] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0025] like Figure 1 , 2 As shown in the figure, this embodiment provides a high-torque heavy-duty reducer shifting structure, which mainly consists of a reducer housing 1, a hollow shaft 2, a large gear 3, a small gear 4, a gear ring 5, and a gear shaft 8. The hollow shaft 2 is rotatably mounted inside the reducer housing 1 at the upper part via roller bearings, and the gear shaft 8 is rotatably mounted inside the reducer housing 1 at the lower part via roller bearings. The gear shaft 8 can be either an output shaft or an input shaft, depending on the actual situation. The front end of the gear shaft 8 (right end in the figure) extends out of the reducer housing 1, and the rear end of the hollow shaft 2 (left end in the figure) extends out of the reducer housing 1 to facilitate the assembly and connection of other components.

[0026] In order to achieve the sliding shifting of the gear ring 5, in this embodiment, the front and rear parts of the hollow shaft 2 are respectively fitted with a large gear 3 and a small gear 4, and the gear ring 5 is slidably fitted in the middle of the hollow shaft 2.

[0027] Specifically, to reduce the size of the gear ring 5, external shift teeth 50 are formed on the outer sides of both ends of the gear ring 5. A first extension ring 30 is formed in the center of the end of the large gear 3 near the gear ring 5, and the inner side of the first extension ring 30 has internal teeth that match the external shift teeth 50. A second extension ring 40 is formed in the center of the end of the small gear 4 near the gear ring 5, and the inner side of the second extension ring 40 also has internal teeth that match the external shift teeth 50. By shifting the gear ring 5 back and forth, the external shift teeth 50 at both ends of the gear ring 5 can mesh with the internal teeth of the first extension ring 30 and the second extension ring 40 respectively, thereby realizing gear shifting. This allows for the conversion between different speed ratios, realizing the gear shifting function. At the same time, unlike the traditional structure, the size of the gear ring 5 can be reduced while maintaining shifting performance, optimizing the internal parts layout space, resulting in a compact structure, reducing costs, and thus reducing the overall size and weight, saving on housing and parts material costs. Furthermore, compared to the traditional heavy-duty reducer shifting structure, this embodiment has lower requirements for the internal space of the gearbox, and can be assembled in a gearbox with limited internal space, ensuring effective shifting and stable operation. It has a wider range of applications and can be used in more scenarios.

[0028] To achieve effective transmission between the gear ring 5 and the hollow shaft 2, an external toothed section 20 is formed in the middle of the hollow shaft 2 in this embodiment. The inner side of the gear ring 5 has internal teeth that are adapted to the external toothed section 20, and the gear ring 5 slides and meshes with the external toothed section 20 through the internal teeth. At the same time, in order to realize the gear shifting transmission of the mechanism, the toothed section of the gear shaft 8 in this embodiment meshes with the large gear 3, and a transmission gear 80 is also mounted on the gear shaft 8 through a flat key. The transmission gear 80 meshes with the small gear 4.

[0029] To more clearly illustrate the principles of this embodiment, please refer to... Figure 1 , 2 As shown, taking the gear shaft 8 as the input shaft as an example. When the gear ring 5 is shifted to the right to switch to the first gear, the outer gear 50 at the right end of the gear ring 5 meshes with the inner gear of the first extension ring 30. Consequently, when the gear shaft 8 rotates, the toothed section of the gear shaft 8 drives the large gear 3 to rotate. The first extension ring 30 of the large gear 3 drives the gear ring 5 to rotate, and the gear ring 5 then drives the hollow shaft 2 to rotate, achieving the output of the first speed ratio. When the gear ring 5 is shifted to the left to switch to the second gear, the outer gear 50 at the left end of the gear ring 5 meshes with the inner gear of the second extension ring 40. Consequently, when the gear shaft 8 rotates, the transmission gear 80 drives the small gear 4 to rotate. The second extension ring 40 of the small gear 4 drives the gear ring 5 to rotate, and the gear ring 5 then drives the hollow shaft 2 to rotate, achieving the output of the second speed ratio.

[0030] To ensure normal gear shifting operation, in this embodiment, the inner rings of both the large gear 3 and the small gear 4 are assembled to the hollow shaft 2 via deep groove ball bearings 6, thus ensuring no interference between the two speed ratios. Furthermore, to reduce friction and ensure smooth operation, an oil supply ring 7 is fitted onto the hollow shaft 2 near the deep groove ball bearing 6. Lubrication oil passages 200, connecting the oil supply ring 7, are provided inside and outside the hollow shaft 2. This allows for periodic lubrication of the deep groove ball bearing 6 through the lubrication oil passages 200 and the oil supply ring 7, reducing friction and ensuring the long-term stable operation of the heavy-duty reducer.

[0031] Of course, in this embodiment, the upper part of the reducer housing 1 is also provided with a shift lever 9 suitable for controlling the sliding of the gear ring 5. The shift lever 9 is connected to the gear ring 5 through an internal linkage structure. The gear ring 5 can be controlled to slide and shift gears by manually operating the shift lever 9 to twist left and right.

[0032] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0033] The above specific embodiments further illustrate the technical problems, technical solutions, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A shifting structure for a high-torque, heavy-duty speed reducer, characterized in that: It includes a reducer housing (1) and a hollow shaft (2) rotatably disposed within the reducer housing (1); The hollow shaft (2) is rotatably fitted with a large gear (3) and a small gear (4) at its front and rear ends, respectively, and a gear ring (5) is slidably fitted in the middle of the hollow shaft (2). The gear ring (5) has shifting external teeth (50) on both outer sides. The large gear (3) has a first extension ring (30) formed in the center of one end near the gear ring (5). The inner side of the first extension ring (30) has internal teeth that are adapted to the shifting external teeth (50). The small gear (4) has a second extension ring (40) formed in the center of one end near the gear ring (5). The inner side of the second extension ring (40) also has internal teeth that are adapted to the shifting external teeth (50). When the gear ring (5) is moved back and forth, the shifting outer teeth (50) at both ends of the gear ring (5) can mesh with the inner teeth of the first extension ring (30) and the inner teeth of the second extension ring (40), respectively.

2. The shifting structure of a high-torque heavy-duty reducer according to claim 1, characterized in that: The hollow shaft (2) has an outer tooth section (20) formed in the middle. The inner side of the tooth ring (5) has an inner tooth that matches the outer tooth section (20). The tooth ring (5) is slidably engaged with the outer tooth section (20) by the inner tooth.

3. The shifting structure of a high-torque heavy-duty reducer according to claim 1, characterized in that: The inner rings of the large gear (3) and the small gear (4) are both assembled with the hollow shaft (2) via deep groove ball bearings (6).

4. The shifting structure of a high-torque heavy-duty reducer according to claim 3, characterized in that: An oil supply ring (7) is also fitted on the hollow shaft (2) near the deep groove ball bearing (6).

5. The shifting structure of a high-torque heavy-duty reducer according to claim 4, characterized in that: The hollow shaft (2) has lubricating oil passages (200) that connect to the oil supply ring (7) on both the inside and outside.

6. The shifting structure of a high-torque heavy-duty reducer according to claim 1, characterized in that: The gearbox (1) is also rotatably equipped with a gear shaft (8), the toothed section of which meshes with the large gear (3); A transmission gear (80) is also provided on the gear shaft (8), and the transmission gear (80) meshes with the pinion (4).

7. The shifting structure of a high-torque heavy-duty reducer according to claim 1, characterized in that: The upper part of the reducer housing (1) is also provided with a shift lever (9) suitable for controlling the sliding of the gear ring (5).

8. The shifting structure of a high-torque heavy-duty reducer according to claim 6, characterized in that: The front end of the gear shaft (8) extends out of the reducer housing (1), and the rear end of the hollow shaft (2) extends out of the reducer housing (1).

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