Sealing dustproof speed reducer

Abstract

The utility model provides a sealed dustproof speed reducer, and belongs to the technical field of mechanical transmission. The problems that in the prior art, according to a traditional framework oil seal structure, a lip is prone to being abraded due to dust invasion, sealing failure is caused, and the service life generally does not exceed 3 months; and in addition, dust and oil dirt mixed in the lubricating oil can block an oil return groove, and the equipment failure risk is further intensified. The sealed dustproof speed reducer comprises a speed reducer body and a transmission shaft assembled in the speed reducer body, an output shaft is installed in the transmission shaft, an inner bearing is arranged between the transmission shaft and the speed reducer body, an outer bearing is arranged between the output shaft and the speed reducer body, and a transmission assembly used for transmission is arranged between a movable shaft and the output shaft. A first sealing cover and a second sealing cover which penetrate through the transmission shaft and the output shaft are arranged on the two sides of the speed reducer body. The utility model has the advantages that the sealing performance is improved and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mechanical drive technical field, and particularly relates to a sealed dustproof speed reducer. BACKGROUND

[0002] The speed reducer is an independent component composed of gear transmission, worm transmission and gear-worm transmission enclosed in a rigid shell, and is commonly used as a speed reduction transmission device between a prime mover and a working machine.

[0003] In the industrial scenes of mines, metallurgy and the like, the speed reducer needs to be exposed to a high-dust and high-load environment for a long time, in the prior art, the traditional skeleton oil seal structure is prone to lip wear due to dust invasion, leading to sealing failure, and the service life is usually not more than 3 months; in addition, the dust and oil stains mixed in the lubricating oil can block the oil return groove, further increasing the risk of equipment failure. SUMMARY

[0004] The utility model discloses a kind of high-efficiency sealed dustproof speed reducers to the above problems existing in prior art.

[0005] The utility model discloses a kind of sealed dustproof speed reducers, including speed reducer body and the transmission shaft of assembly in speed reducer body, output shaft is installed in the transmission shaft, it is characterized in that, the transmission shaft is provided with inner bearing between speed reducer body, the output shaft is provided with outer bearing between speed reducer body, transmission assembly for driving is provided between the transmission shaft and the output shaft, the both sides of the speed reducer body are provided with the sealing cover one and sealing cover two that penetrate transmission shaft and output shaft, and the sealing cover one and sealing cover two are connected by bolt with speed reducer body, the through-hole for output shaft is passed through being set on the sealing cover two, annular sealing groove is set on the through-hole along the sealing cover two, sealing assembly for sealing is set on the sealing groove, the sealing assembly has two symmetrical elastic snap rings, recess is set on the inner wall of the elastic snap ring, the elastic snap ring is provided with clamping ball in recess, cross section T-shaped annular groove is formed between the elastic snap ring.

[0006] In the above-mentioned sealed dustproof speed reducer, the annular groove is provided with a sealing element, the sealing element is composed of a clamping block and a sealing block, the clamping block is provided with a clamping groove for installing the clamping ball, the sealing block is fixed between the elastic snap rings and extends outward to provide a sealing ball, one end of the sealing ball is fixed on the elastic snap ring, and the other end abuts against the output shaft.

[0007] The ball is arranged between the sealing member and the elastic snap ring, and an annular sliding groove for the ball to roll is formed on the outer surface of the sealing member, and an annular limiting groove for limiting the ball is arranged on the inner wall of the elastic snap ring.

[0008] The sealing member is made of elastic material.

[0009] Compared with the prior art, the sealing dustproof speed reducer has the sealing assembly installed on the sealing cover of the speed reducer, thereby improving the sealing performance of the speed reducer, and the sealing member is installed in the sealing assembly and can slide, thereby reducing the friction between the sealing assembly and the output shaft and prolonging the service life of the speed reducer. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is a perspective view of the sealing dustproof speed reducer.

[0011] Figure 2 is a sectional view of the sealing dustproof speed reducer.

[0012] Figure 3 is a partial sectional view of the sealing dustproof speed reducer.

[0013] In the drawings, 1 is a speed reducer body, 2 is a transmission shaft, 3 is an output shaft, 4 is an inner bearing, 5 is an outer bearing, 6 is a transmission assembly, 7 is a sealing cover one, 8 is a sealing cover two, 9 is a sealing groove, 10 is a sealing assembly, 11 is an elastic snap ring, 12 is a groove, 13 is a ball, 14 is an annular groove, 15 is a sealing member, 16 is a clamping block, 17 is a sealing block, 18 is a clamping groove, 19 is a sealing ball, 20 is a ball, 21 is an annular sliding groove, and 22 is an annular limiting groove. DETAILED DESCRIPTION

[0014] The following is a specific embodiment of the utility model and further describes the technical scheme of the utility model in combination with the drawings, but the utility model is not limited to these embodiments.

[0015] As Figure 1 , Figure 2 , Figure 3As shown, the dustproof sealed speed reducer comprises a reducer body 1, a transmission shaft 2 assembled in the reducer body 1, an output shaft 3 installed in the transmission shaft 2, an inner bearing 4 arranged between the transmission shaft 2 and the reducer body 1, an outer bearing 5 arranged between the output shaft 3 and the reducer body 1, a transmission assembly 6 arranged between the transmission shaft and the output shaft 3 for transmission, sealing cover one 7 and sealing cover two 8 arranged on both sides of the reducer body 1 and penetrating the transmission shaft 2 and the output shaft 3, and the sealing cover one 7 and the sealing cover two 8 are connected with the reducer body 1 through bolts, the sealing cover one 7 and the sealing cover two 8 adopt a symmetrical bolt fastening structure and are connected with the end face of the reducer body 1 to form a double-layer protective barrier, a through hole is formed in the sealing cover two 8 for the output shaft 3 to pass through, an annular sealing groove 9 is formed in the sealing cover two 8 along the through hole, a sealing assembly 10 for sealing is arranged on the sealing groove 9, the sealing assembly 10 is sleeved on the output shaft 3, the sealing assembly 10 has two symmetrical elastic clamping rings 11, a groove 12 is formed in the inner wall of the elastic clamping ring 11, a clamping ball 13 is arranged in the groove 12 of the elastic clamping ring 11, and a ring groove 14 with a T-shaped cross section is formed between the elastic clamping rings 11.

[0016] Further, a sealing member 15 is installed in the ring groove 14, the sealing member 15 is composed of a clamping block 16 and a sealing block 17, a clamping groove 18 for installing the clamping ball 13 is arranged on the clamping block 16, the sealing member 15 is fixed in the ring groove 14 and the elastic clamping rings 11 on both sides of the sealing member 15 are fixed through the mutual clamping of the clamping ball 13 and the clamping groove 18, the sealing block 17 is fixed between the elastic clamping rings 11 and outwardly extends to be provided with a sealing ball 19, one end of the sealing ball 19 is fixed on the elastic clamping ring 11, the other end abuts against the output shaft 3, the sealing ball 19 is fixed on the bottom of the elastic clamping ring 11 to prevent the sealing member 15 from deviating during the rotation of the output shaft 3, the other end is fixed on the output shaft 3 to play a sealing role and prevent dust from entering the reducer body 1.

[0017] Further, a ball 20 is arranged between the sealing member 15 and the elastic clamping ring 11, and an annular sliding groove 21 for rolling of the ball 20 is formed on the outer surface of the sealing member 15, an annular limiting groove 22 for limiting the ball 20 is arranged on the inner wall of the elastic clamping ring 11 opposite to the annular sliding groove 21, the sealing member 15 moves along with the ball 20 during the rotation of the output shaft 3 to reduce the friction of the sealing member 15.

[0018] Further, the sealing member 15 is made of an elastic material.

[0019] The specific embodiments described herein are merely illustrative of the present application. Various modifications or changes can be made to the specific embodiments described herein by those skilled in the art without departing from the spirit of the present application, or the scope of the appended claims.

[0020] Although the terms such as speed reducer body 1, transmission shaft 2, output shaft 3, inner bearing 4, outer bearing 5, transmission assembly 6, sealing cover 7, sealing cover 8, sealing groove 9, sealing assembly 10, elastic snap ring 11, groove 12, clamping ball 13, ring groove 14, sealing element 15, clamping block 16, sealing block 17, clamping groove 18, sealing ball 19, ball 20, annular sliding groove 21, annular limiting groove 22 are used more frequently herein, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of the present application; any interpretation of them as any kind of additional limitation is contrary to the spirit of the present application.

Claims

1. A sealed dustproof speed reducer, comprising a speed reducer body (1) and a drive shaft (2) assembled within the speed reducer body (1), wherein an output shaft (3) is installed within the drive shaft (2), characterized in that, An inner bearing (4) is provided between the drive shaft (2) and the reducer body (1), and an outer bearing (5) is provided between the output shaft (3) and the reducer body (1). A transmission assembly (6) for transmission is provided between the drive shaft (2) and the output shaft (3). A sealing cover one (7) and a sealing cover two (8) are provided on both sides of the reducer body (1) to pass through the drive shaft (2) and the output shaft (3). The sealing cover one (7) and the sealing cover two (8) are connected to the reducer body (1) by bolts. The sealing cover (8) has a through hole for the output shaft (3) to pass through. The sealing cover (8) has an annular sealing groove (9) along the through hole. The sealing groove (9) is provided with a sealing component (10) for sealing. The sealing component (10) has two symmetrical elastic retaining rings (11). The inner wall of the elastic retaining ring (11) has a groove (12). The elastic retaining ring (11) is provided with a retaining ball (13) in the groove (12). The elastic retaining rings (11) form a T-shaped annular groove (14) between them.

2. The sealed dustproof speed reducer according to claim 1, characterized in that, A sealing element (15) is installed in the annular groove (14). The sealing element (15) consists of two parts: a snap-fit ​​block (16) and a sealing block (17). The snap-fit ​​block (16) is provided with a snap groove (18) for installing the snap ball (13). The sealing block (17) is fixed between the elastic snap rings (11) and extends outward to provide a sealing ball (19). One end of the sealing ball (19) is fixed on the elastic snap ring (11), and the other end abuts against the output shaft (3).

3. A sealed dustproof speed reducer according to claim 2, characterized in that, A ball (20) is provided between the seal (15) and the elastic retaining ring (11), and an annular groove (21) for the ball (20) to roll is provided on the outer surface of the seal (15), and an annular limiting groove (22) is provided on the inner wall of the elastic retaining ring (11) opposite to the annular groove (21) to limit the ball (20).

4. A sealed dustproof speed reducer according to claim 2, characterized in that, The seal (15) is made of an elastic material.

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