CN204878546U - Speed reducer - Google Patents

Abstract

The utility model discloses a speed reducer, this speed reducer includes: the speed reduction transmission mechanism comprises a transmission shaft arranged in the case, and a first double gear and a second double gear which are arranged on the transmission shaft, the input shaft is provided with a first pinion and a second pinion which have the same size, and the first pinion and the second pinion are respectively meshed with the first double gear and the second double gear; the output shaft is provided with a gearwheel which is engaged with the first and second double gears. The utility model discloses the structure is comparatively simple to adopt dual drive and two transmission modes to carry out matching rotational speed and transmission torque to input shaft and output shaft, have good effect and cross, and have fabulous transmission stability, the maintenance of still being convenient for, the order the utility model discloses higher market competition has.

Description

a reducer

Technical field:

The utility model relates to the technical field of reducers, in particular to a reducer.

Background technique:

The reducer is a kind of transmission, which is generally used for low-speed and high-torque transmission equipment. The principle is to use the electric motor, internal combustion engine, motor or other high-speed running power to mesh the gear with a small number of teeth on the input shaft of the reducer with the gear on the output shaft. The large gear, so as to achieve the purpose of deceleration; the ratio of the number of teeth of the large and small gears is the transmission ratio. The reducer is often used as a reduction transmission device between the prime mover and the working machine. It plays the role of matching speed and transmitting torque between the prime mover and the working machine or the actuator, and is widely used in modern machinery.

The reducer in the prior art generally includes: a casing, an input shaft and an output shaft installed on the casing, and a reduction transmission mechanism installed in the casing and connected between the input shaft and the output shaft. The structure of the reduction transmission mechanism is extremely Simple, resulting in poor transmission stability, and the effect of matching speed and transmission torque is not ideal; The effect is relatively ideal, but its production cost is high, which is not conducive to maintenance.

In view of this, the inventor proposes the following technical solutions.

Utility model content:

The purpose of the utility model is to overcome the deficiencies of the prior art and provide a speed reducer.

In order to solve the above technical problems, the utility model adopts the following technical scheme: the reducer includes: a chassis, an input shaft and an output shaft installed on the chassis, and a shaft installed in the chassis and connected between the input shaft and the output shaft. A reduction transmission mechanism, the reduction transmission mechanism includes a transmission shaft installed in the chassis and first and second double gears installed on the transmission shaft, the input shaft is provided with the first and second pinion gears of the same size, the The first and second pinion gears mesh with the first and second double gears respectively; a large gear is arranged on the output shaft, and the large gear meshes with the first and second double gears.

Furthermore, in the above technical solution, the first double gear and the second double gear have the same structure, and the first double gear and the second double gear are mounted symmetrically on the transmission shaft.

Further, in the above technical solution, the first and second double gears both include a medium-sized gear and a small gear that are solidly integrated, and the medium-sized gears in the first and second double gears are respectively connected to the first and second double gears. The two small gears are engaged; the small gears in the first and second double gears are all engaged with the large gear.

Furthermore, in the above technical solution, a circle of first teeth and a circle of second teeth located beside the first teeth are provided on the periphery of the large gear, and the first teeth and the second teeth are respectively connected to the Describe the meshing of the small gears in the first and second double gears.

Further, in the above technical solution, the teeth of the first and second pinions and the teeth of the medium gear and the small gear in the first and second double gears are all helical teeth; the first teeth and the second The two tooth portions are both helical teeth, and the first tooth portion and the second tooth portion are symmetrical to each other.

Furthermore, in the above technical solution, the input shaft, the output shaft and the transmission shaft are all installed in the chassis through the first, second and third bearings.

Further, in the above technical solution, a first sealing ring is sleeved on the input shaft, and the first sealing ring is located beside the first bearing; a second sealing ring is sleeved on the output shaft, and the second sealing ring is The sealing ring is located at the side of the second bearing; the transmission shaft is sleeved with a third sealing ring, and the third sealing ring is located at the side of the third bearing.

Further, in the above technical solution, the diameter of the dedendum circle of the medium gear of the first and second double gears is twice or more than the diameter of the dedendum circle of the small gear; The diameter of the dedendum circle of the medium-sized gear of the two double gears is 3 times or more than the diameter of the dedendum circle of the first and second small gears; The diameter of the dedendum circle of the medium-sized gear of the second double gear is 1.5 times or more.

After adopting the above technical solution, the utility model has the following beneficial effects compared with the prior art: the utility model has a relatively simple structure, and adopts a double drive and a double transmission mode to match the input shaft and the output shaft for speed and transmission torque, It has good efficiency, excellent transmission stability, and is convenient for maintenance, so that the utility model has high market competitiveness.

Description of drawings:

Fig. 1 is the structural representation of the utility model.

Detailed ways:

Below in conjunction with specific embodiment and accompanying drawing, the utility model is further described.

As shown in Figure 1, it is a reducer, which includes: a chassis 1, an input shaft 2 and an output shaft 3 installed on the chassis 1 and installed in the chassis 1 and connected between the input shaft 2 and the output shaft 3 The reduction transmission mechanism 4, the reduction transmission mechanism 4 includes the transmission shaft 41 installed in the chassis 1 and the first and second double gears 42, 43 installed on the transmission shaft 41, the input shaft 2 is provided with the same size The first and second pinion gears 21, 22, the first and second pinion gears 21, 22 mesh with the first and second double gears 42, 43 respectively; the output shaft 3 is provided with a large gear 31, the The large gear 31 meshes with the first and second double gears 42 and 43 .

The first double gear 42 and the second double gear 43 have the same structure, and the first double gear 42 and the second double gear 43 are symmetrically installed on the transmission shaft 41 .

The first and second double gears 42, 43 all include medium-sized gears 421, 431 and small gears 422, 432 that are solidly integrated, and the medium-sized gears 421, 431 in the first and second double gears 42, 43 are respectively connected with The first and second pinion gears 21 and 22 mesh, so that the input shaft 2 realizes double driving to the transmission shaft 41 through the first and second pinion gears 21 and 22, and has excellent transmission stability. The small gears 422 , 432 in the first and second double gears 42 , 43 are both meshed with the large gear 31 .

A circle of first teeth 311 and a circle of second teeth 312 located on the side of the first teeth 311 are arranged on the periphery of the large gear 31. The first teeth 311 and the second teeth 312 are respectively connected to the first teeth. 1. The small gears 422, 432 in the second double gears 42, 43 mesh, so that the reduction transmission mechanism 4 performs double transmission to the output shaft, and has excellent transmission stability.

The teeth of the first and second pinions 21, 22 and the teeth of the medium gears 421, 431 and small gears 422, 432 in the first and second double gears 42, 43 are helical teeth; Both the first tooth portion 311 and the second tooth portion 312 are helical teeth, and the first tooth portion 311 and the second tooth portion 312 are symmetrical to each other.

The diameters of the dedendum circles of the medium gears 421 and 431 of the first and second double gears 42 and 43 are twice or more than the diameters of the dedendum circles of the small gears 422 and 432; The diameter of the dedendum circle of the medium-sized gear 421,431 of the two double gears 42,43 is 3 times or more than the diameter of the dedendum circle of the first and second pinion gears 21,22; The diameter of the circle is 1.5 times or more than the diameter of the dedendum circle of the medium-sized gears 421 , 431 of the first and second double gears 42 , 43 .

The input shaft 2 , output shaft 3 and transmission shaft 41 are all installed in the case 1 through the first, second and third bearings 101 , 102 , 103 . Wherein, a first sealing ring 104 is sleeved on the input shaft 2, and the first sealing ring 104 is located beside the first bearing 101; a second sealing ring 105 is sleeved on the output shaft 3, and the second sealing ring 104 is The ring 105 is located beside the second bearing 102 ; the transmission shaft 41 is sleeved with a third seal ring 106 , and the third seal ring 106 is located beside the third bearing 103 .

The utility model has a relatively simple structure, and adopts double-drive and double-drive modes to match the speed and transfer torque of the input shaft and the output shaft. It has good efficiency, excellent transmission stability, and is convenient for maintenance. Make the utility model have higher market competitiveness.

Of course, the above descriptions are only specific embodiments of the utility model, and are not intended to limit the implementation scope of the utility model. Should be included in the utility model patent scope.

Claims (8)

1. a speed reducer, it comprises: a cabinet (1), be installed on input shaft (2) and the output shaft (3) on cabinet (1) and be installed in cabinet (1) and the reduction gearing mechanism (4) be connected between input shaft (2) and output shaft (3), it is characterized in that: described reduction gearing mechanism (4) comprises the transmission shaft (41) be installed in cabinet (1) and be installed on transmission shaft (41) first, second Double-gear (42, 43), this input shaft (2) is provided with measure-alike first, second small gear (21, 22), this is first years old, second small gear (21, 22) respectively with first, second Double-gear (42, 43) engage, described output shaft (3) is provided with gearwheel (31), this gearwheel (31) engages with first, second Double-gear (42,43).

2. a kind of speed reducer according to claim 1, it is characterized in that: described the first Double-gear (42) is the same with the second Double-gear (43) structure, and this first Double-gear (42) and the second Double-gear (43) symmetry are installed on described transmission shaft (41).

3. a kind of speed reducer according to claim 1, it is characterized in that: first, second Double-gear described (42,43) includes the middle gear (421,431) and miniature gear (422,432) that are solidified as a whole, and the middle gear (421,431) in this first, second Double-gear (42,43) engages with first, second small gear described (21,22) respectively; Miniature gear (422,432) in this first, second Double-gear (42,43) all engages with described gearwheel (31).

4. a kind of speed reducer according to claim 3, it is characterized in that: described gearwheel (31) periphery is provided with the second teeth portion (312) that circle first teeth portion (311) He Yiquan is positioned at the first teeth portion (311) side, this first teeth portion (311) and the second teeth portion (312) engage with the miniature gear (422,432) in first, second Double-gear described (42,43) respectively.

5. a kind of speed reducer according to claim 4, is characterized in that: the middle gear (421,431) in the teeth portion of first, second small gear described (21,22) and first, second Double-gear (42,43) and the teeth portion of miniature gear (422,432) are helical teeth; First teeth portion (311) and the second teeth portion (312) are helical teeth, and this first teeth portion (311) and the second teeth portion (312) are symmetrically.

6. a kind of speed reducer according to claim 1-5 any one, is characterized in that: described input shaft (2), output shaft (3) and transmission shaft (41) are all installed in cabinet (1) by first, second, third bearing (101,102,103).

7. a kind of speed reducer according to claim 6, is characterized in that: described input shaft (2) is socketed with the first seal ring (104), and this first seal ring (104) is positioned at clutch shaft bearing (101) side; Described output shaft (3) is socketed with the second seal ring (105), this second seal ring (105) is positioned at the second bearing (102) side; Described transmission shaft (41) is socketed with the 3rd seal ring (106), the 3rd seal ring (106) is positioned at the 3rd bearing (103) side.

8. a kind of speed reducer according to claim 3-5 any one, is characterized in that: the root diameter size of the middle gear (421,431) of first, second Double-gear described (42,43) is more than 2 times or 2 times of the root diameter size of miniature gear (422,432); The root diameter size of the middle gear (421,431) of first, second Double-gear described (42,43) is more than 3 times or 3 times of the root diameter size of first, second small gear (21,22); The root diameter size of described gearwheel is more than 1.5 times or 1.5 times of the root diameter size of the middle gear (421,431) of first, second Double-gear described (42,43).