Gear reducer

Abstract

The utility model discloses a gear speed reducer, and relates to the field of speed reducers. Comprising a shell, a gear set is arranged in the shell, an input hole is formed in the shell, an input sleeve is inserted into the input hole, the end, inserted into the shell, of the input sleeve is sleeved with a driving gear, the driving gear is meshed with the gear set, a bearing set is arranged on the shell, the bearing set is coaxial with the input hole, and the bearing set is meshed with the input hole. The input sleeve penetrates through the input hole and the bearing pack; a rotating shaft of a prime motor is inserted into the input sleeve, a key groove is formed in the inner wall of the input sleeve in the axis direction of the input sleeve, and a key on the rotating shaft is inserted into the key groove when the rotating shaft is inserted into the input sleeve. The utility model has the advantages of high stability and long service life.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of speed reducer, especially a kind of improvement of gear speed reducer. BACKGROUND

[0002] Speed reducer is a kind of independent transmission component for reducing speed and increasing torque.The common speed reducer, such as gear speed reducer, is connected with prime mover at one end and load at the other end to match speed and transmit torque.

[0003] The conventional speed reducer generally installs gear set in the shell to reduce speed.According to the inconsistency of use scene, gear set can adopt spur gear set or helical gear set.And an input shaft is generally arranged at the input end of speed reducer and connected with gear set, the input shaft is driven to rotate by prime mover, which can drive gear set in speed reducer to rotate, since the size of input shaft is fixed, therefore, one model of speed reducer can only adapt to one model of prime mover in actual use, and since the position of each gear is fixed in assembly process, once the meshing gap is too large due to gear wear, the service life will be greatly affected. SUMMARY

[0004] In order to overcome the deficiencies of prior art, the utility model provides a gear speed reducer.

[0005] The utility model adopts the following technical scheme to realize: a gear speed reducer, including shell, gear set is equipped in the shell, input hole is opened on the shell, input sleeve is inserted in the input hole, the end of input sleeve inserted in the shell is sleeved with a driving gear, the driving gear is engaged with gear set, bearing set is equipped on the shell, the bearing set is coaxial with the input hole, the input sleeve passes through the input hole and bearing set;

[0006] The input sleeve is inserted into the shaft of prime mover, the inner wall of input sleeve is provided with key groove along the axis direction of input sleeve, when the shaft is inserted into the input sleeve, the key on the shaft is inserted into the key groove.

[0007] The shell includes main body and end cover, one end of the shell is opened, the end cover is installed at the opening of the shell for closing the opening, the input hole is opened on the end cover;

[0008] The bearing set includes first bearing and second bearing, the first bearing is sleeved in the input hole and coaxial with the input hole, the second bearing is arranged in the main body and coaxial with the first bearing, the input sleeve is inserted into the first bearing and the second bearing in sequence, the driving gear is arranged between the first bearing and the second bearing.

[0009] The support plate is provided with a support hole, and the second bearing is installed in the support hole.

[0010] The main body is provided with an output hole, and an output sleeve is sleeved in the output hole.

[0011] The gear set comprises a first transmission gear and a passive gear.

[0012] The shell is provided with a fixing foot, and the fixing foot is provided with a fixing hole.

[0013] Compared with the prior art, the shaft of the prime mover is directly inserted into the input sleeve, and the flat key on the shaft of the prime mover is inserted into the key groove, so that the input sleeve can be driven to rotate. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a structural schematic view of the gear reducer in the utility model;

[0015] Figure 2 is a structural schematic view of the gear reducer in the utility model;

[0016] In the figure: 1, shell; 11, end cover; 12, main body; 13, support plate; 14, input hole; 15, output hole; 2, gear set; 21, first transmission gear; 211, first gear; 212, second gear; 22, second transmission gear; 23, passive gear; 3, bearing set; 31, first bearing; 32, second bearing; 4, input sleeve; 41, key groove; 42, driving gear; 5, output sleeve; 6, fixing foot; 61, fixing hole. DETAILED DESCRIPTION

[0017] In the following, the utility model is further described in combination with the drawings and specific embodiments, and it should be noted that the following described embodiments or technical features can be combined to form new embodiments without conflict.

[0018] Referring to Figures 1-2 A gear reducer comprises a housing 1, a gear set 2 is arranged in the housing 1. The housing 1 is provided with a fixing foot 6, and a fixing hole 61 is arranged on the fixing foot 6. The housing 1 can be placed on a flat ground or fixed by using common fixing methods such as bolts, so that the fixing method is more and the working conditions are more suitable. An input hole 14 is arranged on the housing 1, an input sleeve 4 is arranged in the input hole 14, an end of the input sleeve 4 inserted into the housing 1 is sleeved with a driving gear 42, the driving gear 42 is engaged with the gear set 2, the housing 1 is provided with a bearing set 3, the bearing set 3 is coaxial with the input hole 14, and the input sleeve 4 passes through the input hole 14 and the bearing set 3. The bearing set 3 supports the input sleeve 4. The input sleeve 4 is used for inserting a rotating shaft of a prime mover, a key groove 41 is arranged on an inner wall of the input sleeve 4 along an axis direction of the input sleeve 4, and a key on the rotating shaft is inserted into the key groove 41 when the rotating shaft is inserted into the input sleeve 4. In use, the shaft of the prime mover is directly inserted into the input sleeve 4, and the flat key on the shaft of the prime mover is correspondingly inserted into the key groove 41, so that the input sleeve 4 can be driven to rotate, the output sleeve 5 is driven to rotate to drive the gear set 2 to rotate, and the torque can be increased while the speed is reduced. In use, no coupling is used as an intermediate connecting device, and the use is more simple.

[0019] The housing 1 comprises a main body 12 and an end cover 11, one end of the housing 1 is open, the end cover 11 is arranged at the opening of the housing 1 to close the opening, and the input hole 14 is arranged on the end cover 11. The bearing set 3 comprises a first bearing 31 and a second bearing 32, the first bearing 31 is sleeved in the input hole 14 and coaxial with the input hole 14, the second bearing 32 is arranged in the main body 12 and coaxial with the first bearing 31, the input sleeve 4 is sequentially inserted into the first bearing 31 and the second bearing 32, and the driving gear 42 is arranged between the first bearing 31 and the second bearing 32. A support plate 13 is fixedly arranged in the main body 12, a support hole is arranged on the support plate 13, and the second bearing 32 is arranged in the support hole. The end cover 11 can be conveniently detached from the main body 12, and the first bearing 31 arranged on the end cover 11 can be conveniently detached, so that the first bearing 31 can be more conveniently replaced. The engagement gap can be adjusted by replacing or adjusting the position of the first bearing 31. That is, when the engagement gap of the driving gear 42 is too large due to long-time use, the gap can be finely adjusted, so that the normal engagement gap level between the driving gear 42 and the gear set 2 is restored, and the service life of the reducer is prolonged.

[0020] Furthermore, an output hole 15 is provided on the main body 12, and an output sleeve 5 is fitted inside the output hole 15. The output sleeve 5 is connected to the gear set 2. The load is inserted into the output sleeve 5 and detachably fixed to the output sleeve 5. The rotation of the gear set 2 drives the output sleeve 5 to rotate. The gear set 2 includes a first transmission gear 21 and a driven gear 23. The first transmission gear 21 is located inside the main body 12 and includes a first gear 211 and a second gear 212. The first gear 211 meshes with the drive gear 42, and the second gear 212 meshes with the driven gear 23. The output sleeve 5 is coaxially fixed to the driven gear 23. Of course, the first transmission gear 21 and the driven gear 23 can also be positioned as follows: Figure 2 The diagram shows multiple sets of transmission gears, referred to as the second transmission gear 22 in this embodiment for ease of distinction. Of course, whether to use one or multiple sets of transmission gears depends on the actual application. In this embodiment, the speed reduction is achieved through the transmission action of different transmission gears, thereby meeting the usage requirements.

[0021] Compared to existing technologies, this invention allows the prime mover shaft to be directly inserted into the input sleeve 4, with the flat key on the prime mover shaft correspondingly inserted into the keyway 41, enabling the input sleeve 4 to rotate. The rotation of the output sleeve 5 then drives the gear set 2, thus increasing torque while simultaneously reducing speed. No coupling is required as an intermediate connecting device, simplifying its use. Furthermore, when prolonged use causes wear on the drive gear 42 and an increased meshing clearance, the meshing clearance can be adjusted by replacing the first bearing 31, thereby extending the service life.

[0022] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A gear reducer comprising a housing, a gear set disposed within the housing, characterized in that: The shell is provided with an input hole, and an input sleeve is inserted into the input hole. An end of the input sleeve inserted into the shell is provided with a driving gear, and the driving gear is engaged with a gear set. The shell is provided with a bearing set, and the bearing set is coaxial with the input hole. The input sleeve passes through the input hole and the bearing set. The input sleeve is inserted with a rotating shaft of a prime mover. A key groove is formed on an inner wall of the input sleeve along an axis direction of the input sleeve. When the rotating shaft is inserted into the input sleeve, a key on the rotating shaft is inserted into the key groove.

2. A gear reducer as claimed in claim 1, characterized in that: The shell includes a main body and an end cover. One end of the shell is open. The end cover is installed at the opening of the shell to close the opening. The input hole is formed on the end cover. The bearing set includes a first bearing and a second bearing. The first bearing is sleeved in the input hole and coaxial with the input hole. The second bearing is arranged in the main body and coaxial with the first bearing. The input sleeve is sequentially inserted into the first bearing and the second bearing. The driving gear is arranged between the first bearing and the second bearing.

3. A gear reducer as set forth in claim 2, characterized in that: A support plate is fixed in the main body. The support plate is provided with a support hole. The second bearing is installed in the support hole.

4. A gear reducer as set forth in claim 2, characterized in that: The main body is provided with an output hole. An output sleeve is sleeved in the output hole. The output sleeve is connected with a gear set. A load is inserted into the output sleeve and detachably fixed with the output sleeve. The gear set drives the output sleeve to rotate.

5. A gear reducer as set forth in claim 4, characterized in that: The gear set includes a first driving gear and a driven gear. The first driving gear is arranged in the main body. The first driving gear includes a first gear and a second gear. The first gear is engaged with the driving gear. The second gear is engaged with the driven gear. The output sleeve is coaxially fixed with the driven gear.

6. A gear reducer as set forth in claim 1, characterized in that: The shell is provided with a fixing foot. The fixing foot is provided with a fixing hole.

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