Gear box

Abstract

The utility model relates to the technical field of gear boxes, in particular to a gear box. An inner ring of the bearing is fixed to the periphery of the high-speed shaft, one end of the high-speed shaft penetrates through the end cover, a cavity is formed between the end cover and the bearing, the movable ring, the static ring, the elastic piece and the limiting pieces are all located in the cavity, the high-speed shaft is sleeved with the movable ring in a sliding mode, and the portion, between the movable ring and the end cover, of the periphery of the high-speed shaft is sleeved with the static ring in a sliding mode. The elastic piece is configured to always drive the movable ring to have the trend of pushing the static ring to abut against the inner end face of the end cover, and the multiple limiting pieces are arranged on the periphery of the elastic piece in the circumferential direction at intervals. According to the structure, when the high-speed shaft rotates, the movable ring can continuously provide thrust for the static ring, the static ring is prevented from being separated from the end cover, lubricating oil and external water and dust are prevented from entering and exiting the gear box from a gap between the static ring and the end cover, the sealing performance of the gear box is guaranteed, the working stability of the gear box is guaranteed, and the service life of the gear box is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to gear box technical field especially relates to a gear box. BACKGROUND

[0002] Hydraulic transmission is to transmit energy through the change of liquid pressure energy, transmission through the pipeline, and convert liquid pressure energy into mechanical energy by hydraulic actuator to drive the working mechanism and realize linear motion and rotation. Hydraulic transmission has many outstanding advantages such as small volume, light weight, compact structure, stepless speed regulation, output of large thrust or torque, uniform and stable motion, simple control, high automation, and is widely used in engineering machinery, machine tool, automobile, ship, aerospace and other industries.

[0003] The transmission shaft of the gear box is often driven by hydraulic transmission, and the output shaft often leaks oil when running at high speed, which leads to problems such as decline of motion accuracy and transmission efficiency of hydraulic transmission. At the same time, dust, water and other impurities from the outside enter the gear box, which shortens the service life of the gear box.

[0004] Therefore, there is an urgent need for a gear box to solve the above technical problems. INVENTION CONTENTS

[0005] The utility model discloses a kind of gear boxes, can guarantee high-speed shaft rotation, prevent lubricating oil leakage and the entry of external moisture and dust, ensure sealing.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A kind of gear box, comprising: high-speed shaft, bearing, end cover, moving ring, static ring, elastic member and several limit pieces, the inner ring of the bearing is fixed to the outer periphery of the high-speed shaft, one end of the high-speed shaft passes through the end cover, the cavity is formed between the end cover and the bearing, the moving ring, the static ring, the elastic member and several limit pieces are located in the cavity, the moving ring is slidably sleeved on the outer periphery of the high-speed shaft, the static ring is slidably sleeved on the outer periphery of the high-speed shaft between the moving ring and the end cover, and the elastic member is configured to always drive the moving ring to have the tendency of pushing the inner end surface of the static ring and the end cover, and several limit pieces are circumferentially spaced apart on the outer periphery of the elastic member.

[0008] As a preferred technical solution of the above-mentioned gear box, the gear box further comprises a positioning ring, the positioning ring is slidably sleeved on the outer periphery of the high-speed shaft, one end of the elastic member abuts against the positioning ring away from the moving ring, and one end of the limit piece is connected with the positioning ring.

[0009] As an above-mentioned gear box, a plurality of guide grooves are circumferentially spaced apart on the moving ring, the guide grooves and the limiters are one-to-one correspondingly arranged, the other end of the limiters is arranged in the guide grooves, and the limiters can slide along the length direction of the guide grooves.

[0010] As an above-mentioned gear box, a first protrusion is arranged on the outer periphery of the moving ring, a second protrusion is arranged on the outer periphery of the positioning ring, the two ends of the elastic member abut against the first protrusion and the second protrusion respectively, the guide groove is arranged in the first protrusion, and the limiter is arranged in the second protrusion.

[0011] As an above-mentioned gear box, the elastic member is a spring.

[0012] As an above-mentioned gear box, a third protrusion is arranged on the outer periphery of the static ring, so that part of the static ring can be inserted into the gap between the high-speed shaft and the end cover, and the end face of the third protrusion abuts against the inner end face of the end cover.

[0013] As an above-mentioned gear box, the end cover is provided with a stopper, the stopper is close to the output end of the high-speed shaft, and the stopper is located in the gap, the gear box further comprises a first sealing member, the first sealing member is arranged between the stopper and the static ring, and part of the static ring inserted into the gap abuts against the first sealing member.

[0014] As an above-mentioned gear box, the gear box further comprises a second sealing member, the second sealing member is arranged between the end face of the third protrusion and the inner end face of the end cover.

[0015] As an above-mentioned gear box, the gear box further comprises a third sealing member, the third sealing member is arranged between the inner periphery of the moving ring and the outer periphery of the high-speed shaft.

[0016] As an above-mentioned gear box, the gear box further comprises a distance ring, the two ends of the distance ring abut against the end cover and the outer ring of the bearing respectively.

[0017] The utility model has the advantages of:

[0018] This utility model provides a gearbox. The gearbox includes: a high-speed shaft, a bearing, an end cover, a rotating ring, a stationary ring, an elastic element, and several limiting elements. The inner ring of the bearing is fixed to the outer circumference of the high-speed shaft. One end of the high-speed shaft passes through the end cover, forming a cavity between the end cover and the bearing. The rotating ring, stationary ring, elastic element, and several limiting elements are all located within the cavity. The rotating ring is slidably sleeved on the outer circumference of the high-speed shaft, and the stationary ring is slidably sleeved on the outer circumference of the high-speed shaft between the rotating ring and the end cover. The elastic element is configured to always drive the rotating ring to have a tendency to push the stationary ring against the inner end face of the end cover. Several limiting elements are circumferentially spaced on the outer circumference of the elastic element. This structure uses an elastic element to push the moving ring, so that when the high-speed shaft rotates, the moving ring continuously provides thrust to the stationary ring, ensuring that the stationary ring always abuts against the end cover, preventing the stationary ring from separating from the end cover, and preventing lubricating oil and external moisture and dust from entering or leaving the gearbox through the gap between the stationary ring and the end cover, thus ensuring the gearbox's sealing performance. The limiting element can prevent the elastic element from shifting, ensuring the elastic element works stably, guaranteeing the stability of the gearbox operation, and improving the service life of the gearbox. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model 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 the content of the embodiments of this utility model and these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the gearbox provided in an embodiment of this utility model;

[0021] Figure 2 A structural cross-sectional view of the gearbox provided in an embodiment of this utility model;

[0022] Figure 3 for Figure 2 A magnified view of part A in the middle;

[0023] Figure 4 A schematic diagram of the structure of the moving ring provided in an embodiment of this utility model;

[0024] Figure 5 A schematic diagram of the stationary ring provided in an embodiment of this utility model;

[0025] Figure 6 A schematic diagram of the positioning ring provided in an embodiment of this utility model.

[0026] In the picture:

[0027] 1. High-speed shaft; 2. Bearing; 3. End cover; 31. Stop block; 4. Moving ring; 41. Guide groove; 42. First protrusion; 5. Stationary ring; 51. Third protrusion; 6. Elastic element; 7. Limiting element; 8. Positioning ring; 81. Second protrusion; 9. First seal; 10. Second seal; 11. Third seal; 12. Distance ring. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0029] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0032] like Figures 1 to 6 As shown, this utility model provides a gearbox. The gearbox includes: a high-speed shaft 1, a bearing 2, an end cover 3, a moving ring 4, a stationary ring 5, an elastic element 6, and several limiting elements 7.

[0033] Specifically, the inner ring of the bearing 2 is fixed to the outer periphery of the high-speed shaft 1, one end of the high-speed shaft 1 passes through the end cover 3, the end cover 3 is connected with the outer ring of the bearing 2, so that the cavity is formed between the end cover 3 and the bearing 2, the dynamic ring 4, the static ring 5, the elastic member 6 and the plurality of limiting members 7 are located in the cavity, the dynamic ring 4 is slidingly sleeved on the outer periphery of the high-speed shaft 1, the static ring 5 is slidingly sleeved on the outer periphery of the high-speed shaft 1 between the dynamic ring 4 and the end cover 3, and the elastic member 6 is configured to always drive the dynamic ring 4 to have a tendency to push the static ring 5 to abut against the inner end face of the end cover 3, and the plurality of limiting members 7 are circumferentially spaced apart on the outer periphery of the elastic member 6. The structure pushes the dynamic ring 4 by the elastic member 6, so that when the high-speed shaft 1 rotates, the dynamic ring 4 continuously provides a pushing force for the static ring 5, so that the static ring 5 always abuts against the end cover 3, prevents the static ring 5 from separating from the end cover 3, avoids the lubricating oil and external moisture and dust from entering and exiting the gear box through the gap between the static ring 5 and the end cover 3, and ensures the sealing performance of the gear box; the limiting members 7 can prevent the elastic member 6 from deviating, so that the elastic member 6 works stably, ensures the stability of the gear box, and improves the service life of the gear box.

[0034] Optionally, the gear box further comprises a positioning ring 8, the positioning ring 8 is slidingly sleeved on the outer periphery of the high-speed shaft 1, one end of the elastic member 6 away from the dynamic ring 4 abuts against the positioning ring 8, and one end of the limiting member 7 is connected with the positioning ring 8, which can improve the stability of the limiting member 7.

[0035] Optionally, the dynamic ring 4 is circumferentially spaced apart and provided with a plurality of guide grooves 41, the plurality of guide grooves 41 are one-to-one correspondingly arranged with the plurality of limiting members 7, the other end of the limiting member 7 is arranged in the guide groove 41, and the limiting member 7 can slide along the length direction of the guide groove 41. Specifically, one end of the plurality of limiting members 7 is uniformly and circumferentially spaced apart and fixed to the outer periphery of the positioning ring 8, the other end of the limiting member 7 is inserted into the guide groove 41 and slides along the length direction of the guide groove 41, which can make the elastic force of the elastic member 6 uniformly distributed on the dynamic ring 4, and then make the static ring 5 balanced in force, and improve the sealing performance. In this embodiment, the gear box is provided with four limiting members 7. Of course, in other embodiments, the number of limiting members 7 is determined according to actual conditions, which will not be described here.

[0036] Optionally, the outer periphery of the dynamic ring 4 is provided with a first protrusion 42, the outer periphery of the positioning ring 8 is provided with a second protrusion 81, both ends of the elastic member 6 abut against the first protrusion 42 and the second protrusion 81 respectively, the guide groove 41 is arranged on the first protrusion 42, and the limiting member 7 is arranged on the second protrusion 81. Specifically, the cross section of the dynamic ring 4 and the positioning ring 8 is L-shaped, the elastic member 6 is a spring, the spring is sleeved on the outer periphery of the high-speed shaft 1, both ends of the elastic member 6 are connected with the end face of the first protrusion 42 and the end face of the second protrusion 81 respectively, and the limiting member 7 is located on the outer periphery of the spring, which can prevent the spring from deviating and ensure the spring to stretch and contract along the axial direction.

[0037] Optionally, the outer periphery of the static ring 5 is provided with a third protrusion 51, so that part of the static ring 5 can be inserted into the gap between the high-speed shaft 1 and the end cover 3, and the end surface of the third protrusion 51 abuts against the inner end surface of the end cover 3. Specifically, the cross section of the static ring 5 is L-shaped, which can achieve the effect of double sealing.

[0038] Optionally, the end cover 3 is provided with a stopper 31 close to the output end of the high-speed shaft 1, and the stopper 31 is located in the gap. The gear box further comprises a first sealing member 9 arranged between the stopper 31 and the static ring 5, and part of the static ring 5 inserted into the gap abuts against the first sealing member 9. Specifically, the end cover 3 is provided with a through hole, one end of the high-speed shaft 1 passes through the through hole as an output end, and the front end of the hole wall of the through hole is provided with a stopper 31 inwardly protruding. The static ring 5 extrudes the first sealing member 9 to deform, thereby improving the sealing performance.

[0039] Optionally, the gear box further comprises a second sealing member 10 arranged between the end surface of the third protrusion 51 and the inner end surface of the end cover 3, thereby improving the sealing performance between the third protrusion 51 and the end cover 3.

[0040] Optionally, the gear box further comprises a third sealing member 11 arranged between the inner periphery of the dynamic ring 4 and the outer periphery of the high-speed shaft 1, thereby improving the sealing performance between the dynamic ring 4 and the high-speed shaft 1.

[0041] Optionally, the gear box further comprises a distance ring 12, both ends of the distance ring 12 abut against the end cover 3 and the outer ring of the bearing 2, respectively, thereby improving the stability and precision of the operation of the gear box.

[0042] Optionally, the end cover 3 is made of transparent material, so that the working condition of the sealing structure can be observed.

[0043] In addition, the above is only a preferred embodiment of the present application and the technical principle applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A gearbox, characterized in that The gear box comprises a high-speed shaft (1), a bearing (2), an end cover (3), a movable ring (4), a static ring (5), an elastic member (6) and a plurality of limiting members (7), the inner ring of the bearing (2) is fixed to the outer periphery of the high-speed shaft (1), one end of the high-speed shaft (1) penetrates the end cover (3), a cavity is formed between the end cover (3) and the bearing (2), the movable ring (4), the static ring (5), the elastic member (6) and the plurality of limiting members (7) are located in the cavity, the movable ring (4) is slidably sleeved on the outer periphery of the high-speed shaft (1), the static ring (5) is slidably sleeved on the outer periphery of the high-speed shaft (1) between the movable ring (4) and the end cover (3), and the elastic member (6) is configured to always drive the movable ring (4) to have a tendency to push the static ring (5) to abut against the inner end surface of the end cover (3), and the plurality of limiting members (7) are circumferentially spaced apart on the outer periphery of the elastic member (6). The gear box further comprises a positioning ring (8) slidably sleeved on the outer periphery of the high-speed shaft (1), one end of the elastic member (6) away from the movable ring (4) abuts against the positioning ring (8), and one end of the limiting member (7) is connected with the positioning ring (8).

2. A gearbox as claimed in claim 1, characterised in that The movable ring (4) is circumferentially spaced apart and provided with a plurality of guide grooves (41), the plurality of guide grooves (41) are one-to-one correspondingly arranged with the plurality of limiting members (7), the other end of the limiting member (7) is arranged in the guide groove (41), and the limiting member (7) can slide along the length direction of the guide groove (41).

3. A gearbox as claimed in claim 2, characterised in that The outer periphery of the movable ring (4) is provided with a first protrusion (42), the outer periphery of the positioning ring (8) is provided with a second protrusion (81), the two ends of the elastic member (6) respectively abut against the first protrusion (42) and the second protrusion (81), the guide groove (41) is arranged on the first protrusion (42), and the limiting member (7) is arranged on the second protrusion (81).

4. A gearbox as claimed in claim 3, characterised in that The elastic member (6) is a spring.

5. A gearbox according to claim 4, characterised in that The outer periphery of the static ring (5) is provided with a third protrusion (51), so that part of the static ring (5) can be inserted into the gap between the high-speed shaft (1) and the end cover (3), and the end surface of the third protrusion (51) abuts against the inner end surface of the end cover (3).

6. A gearbox as claimed in claim 1, characterised in that The end cover (3) is provided with a stop block (31) close to the output end of the high-speed shaft (1), and the stop block (31) is located in the gap, the gear box further comprises a first sealing member (9) arranged between the stop block (31) and the static ring (5), and part of the static ring (5) is inserted into the gap and abuts against the first sealing member (9).

7. A gearbox according to claim 6, characterised in that The gear box further comprises a second sealing member (10) arranged between the end surface of the third protrusion (51) and the inner end surface of the end cover (3).

8. A gearbox according to claim 6, characterised in that The gear box further comprises a third sealing member (11) arranged between the inner periphery of the movable ring (4) and the outer periphery of the high-speed shaft (1).

9. A gearbox according to any one of claims 1-8, characterized in that ​ 10. A gearbox according to any one of claims 1-8, characterized in that The gear box further comprises a constant distance ring (12), two ends of the constant distance ring (12) abut against the end cover (3) and the outer ring of the bearing (2) respectively.

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