CN218152257U - Power transmission device and reducer - Google Patents

Abstract

The utility model relates to a power transmission device and a reducer. The power input from the drive motor to the input shaft drives the input gear to rotate, thereby synchronously driving the first transmission gear to rotate, and then driving the second transmission gear to rotate synchronously, and then synchronously driving the output gear to rotate. And finally drive the output shaft to rotate to output the power concentrically. Moreover, since the central axis of the first transmission tooth and the central axis of the input shaft are arranged parallel to each other and spaced apart, that is, the first straight line and the second straight line are arranged parallel to each other and spaced apart, so that the power is stable on the two parallel straight lines Compared with the traditional planetary reducer, there is no problem of excessive centrifugal force, and it can adapt to the high-speed rotation requirements.

Description

Power transmission device and reducer

technical field

The utility model relates to the technical field of power machinery, in particular to a power transmission device and a reducer.

Background technique

Various power transmission devices are usually equipped with reducers to achieve the purpose of reducing the speed, increasing the output torque, and reducing the load inertia. For example, planetary reducers are usually used in micro-power detection devices. However, during the use of the planetary reducer, when the speed rises above 100,000rpm, the centrifugal force of the high-speed rotation of the planetary gear is too large to meet the high-speed rotation requirements.

Utility model content

Based on this, it is necessary to provide a power transmission device and a reducer for the problem that the existing reducer cannot meet the high-speed rotation requirement.

Its technical scheme is as follows:

In one aspect, a reducer is provided, including:

an input shaft, the input shaft is provided with input teeth;

An output shaft, the output shaft and the input shaft are arranged at intervals, the output shaft is provided with output teeth, the number of teeth of the output teeth is greater than the number of teeth of the input teeth, and the central axis of the input shaft and the the central axes of the output shafts are collinear; and

A transmission mechanism, the transmission mechanism includes a first transmission tooth and a second transmission tooth in transmission connection, the first transmission tooth is externally meshed with the input tooth, and the second transmission tooth is externally meshed with the output tooth, so The central axis of the first transmission tooth is collinear with the central axis of the second transmission tooth, and the central axis of the first transmission tooth and the central axis of the input shaft are arranged parallel to each other and spaced apart.

The technical scheme is further described below:

In one of the embodiments, the reducer further includes a housing, the housing is provided with an installation cavity, an input port communicated with the installation cavity, and an output port communicated with the installation cavity, the input shaft A part is rotatably set in the input port so that the input teeth are set in the installation cavity, and a part of the output shaft is rotatably set in the output port so that the output teeth are set in the installation cavity, and the transmission The mechanism is arranged in the installation cavity.

In one of the embodiments, both the first transmission gear and the second transmission gear are located on one side of the central axis of the input shaft, and the housing is also provided with an oil injection channel communicating with the installation cavity, And the oil injection channel is located on the other side of the central axis of the input shaft.

In one of the embodiments, the speed reducer further includes a blocking member, which is arranged in the oil injection channel and blocks the oil injection channel.

In one of the embodiments, the speed reducer further includes a sealing member, and the sealing member is sealingly engaged with the inner wall of the oil injection channel and the blocking member.

In one of the embodiments, the transmission mechanism further includes a first transmission shaft, a second transmission shaft and a third transmission shaft, and the first transmission shaft, the second transmission shaft and the third transmission shaft can be Rotationally arranged in the installation cavity, the central axis of the first transmission shaft and the central axis of the input shaft are arranged in parallel and spaced apart from each other, the first transmission teeth are arranged on the outer wall of the first transmission shaft and Rotate synchronously with the first transmission shaft, the outer wall of the first transmission shaft is also provided with a third transmission tooth that rotates synchronously, the second transmission shaft is arranged between the input shaft and the output shaft, And the central axis of the second transmission shaft is collinear with the central axis of the input shaft, and the outer wall of the second transmission shaft is provided with fourth transmission teeth and The fifth transmission tooth, the central axis of the third transmission shaft is collinear with the central axis of the first transmission shaft, the second transmission tooth is arranged on the outer wall of the third transmission shaft and is connected to the third transmission shaft The transmission shaft rotates synchronously, and the outer wall of the third transmission shaft is also provided with a sixth transmission tooth that rotates synchronously, and the third transmission tooth is externally meshed with the fourth transmission tooth, and the fifth transmission tooth is in contact with the fourth transmission tooth. The sixth transmission tooth is externally meshed.

In one embodiment, the number of teeth of the sixth transmission teeth is the same as that of the first transmission teeth, the number of teeth of the third transmission teeth is the same as that of the second transmission teeth, and the number of teeth of the fifth transmission teeth is the same as that of the first transmission teeth. The number of teeth is the same as that of the input teeth, and the number of teeth of the fourth transmission teeth is the same as that of the output teeth.

In one of the embodiments, the second transmission shaft is integrally formed; or the second transmission shaft includes a first transmission sleeve and a second transmission sleeve, and the first transmission sleeve is provided with the fourth transmission gear, so The second transmission sleeve is provided with the fifth transmission teeth, and the first transmission sleeve and the second transmission sleeve are inserted into each other.

In one of the embodiments, the housing includes a front cover, a box body and a back cover, the front cover, the box body and the back cover enclose the installation cavity, and the front cover is provided with the The input port and the first connection hole, the box is provided with a second connection hole corresponding to the first connection hole, and the rear cover is provided with the output port and communicated with the second connection hole The reducer further includes a fastener, and the fastener is fastened to the first connection hole, the second connection hole and the third connection hole.

In one of the embodiments, the first transmission tooth is a gear structure sleeved on the outer wall of the first transmission shaft; the sixth transmission tooth is a gear structure sleeved on the outer wall of the third transmission shaft .

In one of the embodiments, the input shaft has an input end for connecting with a driving motor;

The drive motor has a flat square output shaft, and the input end is provided with a first jack for inserting the flat square output shaft, and the cross-sectional profile shape of the first jack is similar to that of the flat square output shaft. The cross-sectional profile of the matching;

Or the reducer also includes a connecting sleeve and a lock pin, the drive motor has a cylindrical output shaft and a first groove arranged on the outer wall of the cylindrical output shaft, and the input end is provided with a The second insertion hole and the second slot that is arranged on the side wall of the second insertion hole and penetrates to the outer side wall of the cylindrical output shaft, the second slot can communicate with the first slot to form a The installation slot for the lock pin is installed, and the connecting sleeve is sleeved on the outer side wall of the input end to limit the lock pin.

In another aspect, a power transmission device is provided, which includes a drive motor and the reducer, and the drive motor is in transmission connection with the input shaft.

In the power transmission device and the reducer of the above embodiment, the power input from the drive motor to the input shaft drives the input gear to rotate, thereby driving the first transmission gear to rotate synchronously, and then driving the second transmission gear to rotate synchronously, and then synchronously driving the output gear to rotate and finally Drive the output shaft to rotate and output the power concentrically. Moreover, since the central axis of the first transmission tooth and the central axis of the input shaft are arranged parallel to and spaced apart from each other, that is, the first straight line and the second straight line are arranged parallel to each other and spaced apart, so that the power is stable on the two parallel straight lines Compared with the traditional planetary reducer, there will be no problem of excessive centrifugal force, and it can adapt to the high-speed rotation requirements.

Description of drawings

The accompanying drawings constituting a part of this application are used to provide a further understanding of the utility model, and the schematic embodiments of the utility model and their descriptions are used to explain the utility model, and do not constitute an improper limitation of the utility model.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some implementations of the present invention. For example, those of ordinary skill in the art can also obtain other drawings based on these drawings on the premise of not paying creative efforts.

Fig. 1 is a sectional view of a speed reducer according to an embodiment;

Fig. 2 is a cross-sectional view of the speed reducer in Fig. 1 from another perspective.

Explanation of reference signs:

10, reducer; 100, input shaft; 110, input gear; 120, input end; 1201, second jack; 1202, second slot; 1203, connecting sleeve; 200, output shaft; 210, output gear; 310, The first transmission tooth; 320, the second transmission tooth; 330, the first transmission shaft; 331, the third transmission tooth; 340, the second transmission shaft; 341, the fourth transmission tooth; 342, the fifth transmission tooth; 350, the first transmission tooth Three transmission shafts; 351, sixth transmission gear; 400, shell; 410, installation cavity; 420, input port; 430, output port; 440, oil injection channel; 450, front cover; 460, box body; 461, front box 462, the middle box body; 463, the rear box body; 470, the back cover; 500, the plugging piece; 600, the fastener; 1000, the first straight line; 2000, the second straight line.

detailed description

In order to make the above purpose, features and advantages of the present utility model more obvious and understandable, the specific implementation of the present utility model will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a full understanding of the present invention. However, the utility model can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below limit.

In one embodiment, a power transmission device is provided, including a driving motor (not shown) and a reducer 10 .

Wherein, the drive motor is connected to the speed reducer 10, so that the speed reducer 10 reduces the output speed of the drive motor, increases the output torque of the drive motor, and reduces the load inertia of the drive motor. Moreover, the speed reducer 10 can adapt to high-speed rotation requirements.

As shown in FIG. 1 , in one embodiment, the speed reducer 10 includes an input shaft 100 , an output shaft 200 and a transmission mechanism.

Wherein, the input shaft 100 is in transmission connection with the driving motor, so that the driving motor transmits power to the transmission mechanism through the input shaft 100 and finally outputs it through the output shaft 200 .

Wherein, the transmission connection between the input shaft 100 and the driving motor can be realized by socketing or plugging, as long as power transmission can be realized.

As shown in FIG. 1 , in one embodiment, the input shaft 100 has an input end 120 connected to a driving motor. The drive motor has a flat square output shaft 200 . Wherein, the input end 120 is provided with a first socket for inserting the flat square output shaft 200, so that the flat square output shaft 200 is inserted into the first socket of the input shaft 100, due to the cross-sectional profile of the first socket The shape matches the cross-sectional profile of the flat square output shaft 200, so that the outer side wall of the flat square output shaft 200 is in conflict with the inner side wall of the first socket, so that when the flat square output shaft 200 rotates, it can synchronously drive the input shaft 100 rotations to realize power input transmission.

Wherein, the cross-sectional profile of the flat square output shaft 200 may be in the shape of a rectangle, a rhombus, or the like.

In another embodiment, the input shaft 100 has an input end 120 connected to the drive motor, and the input end 120 is provided with a second insertion hole 1201 and is arranged on the side wall of the second insertion hole 1201 and penetrates to the cylindrical output shaft. The second groove 1202 on the outer side wall. The reducer 10 also includes a connecting sleeve 1203 and a locking pin. Moreover, the driving motor has a cylindrical output shaft 200 and a first groove arranged on the outer wall of the cylindrical output shaft 200, and the cylindrical output shaft 200 is inserted into the second socket 1201 so that the first groove and the second groove 1202 communicate correspondingly to form an installation. The locking pin is installed in the installation groove, so that the input end 120 is connected with the cylindrical output shaft 200 by the locking pin, so that when the cylindrical output shaft 200 rotates, it can synchronously drive the input shaft 100 to rotate, thereby realizing power input transmission. In addition, the connecting sleeve 1203 is sleeved on the outer wall of the input end 120 to limit the locking pin, so that the locking pin can be prevented from falling off from the installation groove by the limiting effect of the connecting sleeve 1203, ensuring that the input shaft 100 and the cylindrical output shaft 200 The stability and reliability of the assembly connection enables stable and reliable transmission of power.

Of course, in other embodiments, the second groove may not penetrate to the outer wall of the cylindrical output shaft, it only needs to enable the lock pin to be placed in the installation groove to connect the cylindrical output shaft with the input end.

As shown in FIG. 1 and FIG. 2 , an input gear 110 is provided on the end of the input shaft 100 away from the driving motor, and when the input shaft 100 rotates, it can drive the input gear 110 to rotate synchronously and concentrically.

As shown in FIG. 1 and FIG. 2 , the output shaft 200 and the input shaft 100 are arranged at intervals relative to each other. Moreover, an output tooth 210 is provided at an end of the output shaft 200 close to the input shaft 100 .

At the same time, the central axis of the input shaft 100 and the central axis of the output shaft 200 are collinear, that is, the input shaft 100 and the output shaft 200 rotate around a common first straight line 1000 .

As shown in FIG. 1 , the transmission mechanism includes a first transmission tooth 310 and a second transmission tooth 320 which are transmission connected to each other, that is, the power of the first transmission tooth 310 can be transmitted to the second transmission tooth 320 .

Specifically, the first transmission teeth 310 are externally meshed with the input teeth 110, so that the first transmission teeth 310 can rotate synchronously with the input teeth 110; the second transmission teeth 320 are externally meshed with the output teeth 210, so that the second transmission teeth 320 can rotate It rotates synchronously with the output tooth 210. At the same time, the central axis of the first transmission tooth 310 is collinear with the central axis of the second transmission tooth 320 , that is, the first transmission tooth 310 and the second transmission tooth 320 rotate around the common second straight line 2000 . In this way, the power input from the drive motor to the input shaft 100 drives the input gear 110 to rotate, thereby synchronously driving the first transmission gear 310 to rotate, and then driving the second transmission gear 320 to rotate synchronously, and then synchronously driving the output gear 210 to rotate and finally driving the output shaft 200 Rotate to output the power concentrically. Moreover, since the central axis of the first transmission tooth 310 and the central axis of the input shaft 100 are arranged parallel to each other and spaced apart, that is, the first straight line 1000 and the second straight line 2000 are arranged parallel to each other and spaced apart from each other, so that the power is distributed between the two parallel straight lines. On the smooth transmission, compared with the traditional planetary reducer 10, there will be no problem of excessive centrifugal force, and it can meet the requirements of high-speed rotation.

As shown in FIG. 1 , more specifically, the speed reducer 10 further includes a housing 400 . The casing 400 is provided with an installation cavity 410 , an input port 420 communicating with the installation cavity 410 , and an output port 430 communicating with the installation cavity 410 .

As shown in FIG. 1 , a part of the input shaft 100 is rotatably arranged in the input port 420 by means of bearing support, etc., and the input gear 110 is arranged in the installation cavity 410, that is, one end of the input shaft 100 extends out of the installation cavity 410. The other end of the input shaft 100 protrudes into the installation cavity 410 through the input port 420 and is provided with input teeth 110 . Certainly, a bush and a retaining ring may also be combined so that the input shaft 100 can be rotatably passed through the input port 420 .

As shown in FIG. 1 , a part of the output shaft 200 is rotatably arranged in the output port 430 by means of bearing support, etc., and the output tooth 210 is arranged in the installation cavity 410, that is, one end of the output shaft 200 extends out of the installation cavity 410 The other end of the output shaft 200 protrudes into the installation cavity 410 through the output port 430 and is provided with output teeth 210 . Certainly, a bush and a retaining ring can also be combined so that the output shaft 200 can be rotatably passed through the output port 430 .

As shown in FIG. 1 , at the same time, the transmission mechanism is disposed in the installation cavity 410 , that is, both the first transmission gear 310 and the second transmission gear 320 are rotatably disposed in the installation cavity 410 .

As shown in FIG. 1 , further, the first transmission teeth 310 and the second transmission teeth 320 are located on one side of the central axis of the input shaft 100 . Moreover, the housing 400 is also provided with an oil injection channel 440 communicating with the installation cavity 410, and the oil injection channel 440 is located on the other side of the central axis of the input shaft 100, that is, the second straight line 2000 is located on one side of the first straight line 1000 and The oil injection channel 440 is located on the opposite side of the first straight line 1000, and is set in such a way that the arrangement of the first transmission teeth 310 and the second transmission teeth 320 will not interfere with the opening of the oil injection channel 440, so that the overall layout of the reducer 10 more compact.

As shown in Figure 1, in one embodiment, the first transmission tooth 310 and the second transmission tooth 320 are arranged on the lower side of the first straight line 1000, and the oil injection channel 440 is opened on the upper side of the first straight line 1000, so that It is simple and convenient to inject lubricating oil into the installation cavity 410 through the oil injection channel 440 from top to bottom, and avoid leakage when filling lubricating oil.

Of course, in other embodiments, it is also possible that the first transmission tooth 310 and the second transmission tooth 320 are arranged on the upper side of the first straight line 1000, and the oil injection channel 440 is opened on the lower side of the first straight line 1000, through A one-way valve is set in the channel 440 to realize the filling of lubricating oil.

As shown in FIG. 1 , further, the speed reducer 10 further includes a blocking member 500 . Wherein, the sealing member 500 is disposed in the oil injection channel 440 , so that the oil injection channel 440 is blocked by the sealing member 500 to avoid leakage of lubricating oil from the installation cavity 410 .

Wherein, the blocking member 500 may be in the form of a blocking screw, or in the form of a blocking plug.

Specifically, the plugging member 500 is set as a plugging screw, and the inner wall of the oil injection channel 440 is provided with an internal thread threadedly connected with the plugging screw, and the oil injection channel 440 is blocked by screwing the plugging screw into the oil injection channel 440 .

Still further, the speed reducer 10 also includes a seal, and the seal is in sealing fit with the inner wall of the oil injection channel 440 and the blocking member 500 . In this way, the sealing effect on the oil injection channel 440 is further improved by the sealing member, so as to prevent the lubricating oil from leaking out from the oil injection channel 440 .

Wherein, the sealing member may be in the form of a sealing ring, or in the form of a sealing sleeve, or in the form of a sealing gasket.

Specifically, the oil injection channel 440 is set as a counterbore with an internal thread, the plugging member 500 is set as a plugging screw, and the sealing member is set as an O-ring, and the O-ring is set on the bottom wall of the counterbore. When the plugging screw is screwed into the counterbore, the head of the plugging screw squeezes the O-ring to realize sealing fit.

As shown in FIG. 1 , in addition, the transmission mechanism further includes a first transmission shaft 330 , a second transmission shaft 340 and a third transmission shaft 350 . Moreover, the first transmission shaft 330 , the second transmission shaft 340 and the third transmission shaft 350 are rotatably disposed in the installation cavity 410 .

Wherein, the central axis of the first transmission shaft 330 and the central axis of the input shaft 100 are arranged parallel to and spaced apart from each other, that is, the central axis of the first transmission shaft 330 is located on the second straight line 2000 . The first transmission gear 310 is disposed on the outer wall of the first transmission shaft 330 and rotates synchronously with the first transmission shaft 330 . The outer wall of the first transmission shaft 330 is also provided with a third transmission gear 331 which rotates synchronously.

Wherein, the first transmission tooth 310 can be a tooth shape that is directly processed and formed on the outer wall of the first transmission shaft 330, or can be a gear structure sleeved on the outer wall of the first transmission shaft 330, and the gear structure can pass through the shaft The method of hole fit combined with interference fit realizes synchronous rotation with the first transmission shaft 330. It is also possible to arrange external teeth on the outer wall of the first transmission shaft 330 and internal teeth on the inner hole of the first transmission gear 310. The meshing between the teeth and the external teeth can also be realized through the cooperation of the key and the keyway.

Wherein, the third transmission tooth 331 is a tooth shape directly processed and formed on the outer wall of the first transmission shaft 330; the third transmission tooth 331 can be set separately, if the first transmission tooth 310 is a gear structure with internal teeth, then the third transmission tooth The third transmission tooth 331 can also be extended to engage with the internal teeth on the inner hole of the first transmission tooth 310 .

As shown in FIG. 1 , the second transmission shaft 340 is disposed between the input shaft 100 and the output shaft 200 . Moreover, the central axis of the second transmission shaft 340 is collinear with the central axis of the input shaft 100 , that is, the central axis of the second transmission shaft 340 is located on the first straight line 1000 . Meanwhile, the outer wall of the second transmission shaft 340 is provided with a fourth transmission tooth 341 and a fifth transmission tooth 342 which are spaced apart and rotate synchronously with the second transmission shaft 340 . In this way, the second transmission shaft 340 can synchronously drive the fourth transmission gear 341 and the fifth transmission gear 342 to rotate around the first straight line 1000 .

As shown in FIG. 1 , the central axis of the third transmission shaft 350 is collinear with the central axis of the first transmission shaft 330 , that is, the central axis of the third transmission shaft 350 is located on the second straight line 2000 . The second transmission gear 320 is disposed on the outer wall of the third transmission shaft 350 and rotates synchronously with the third transmission shaft 350 , and the outer wall of the third transmission shaft 350 is further provided with a sixth transmission tooth 351 which rotates synchronously.

Wherein, the sixth transmission tooth 351 can be a tooth shape directly formed on the outer wall of the third transmission shaft 350, or can be a gear structure sleeved on the outer wall of the third transmission shaft 350, and the gear structure can pass through the shaft The method of hole fit combined with interference fit realizes synchronous rotation with the third transmission shaft 350. External teeth can also be set on the outer wall of the third transmission shaft 350 and internal teeth can be set on the inner hole of the sixth transmission gear 351. The meshing between the teeth and the external teeth can also be realized through the cooperation of the key and the keyway.

Wherein, the second transmission tooth 320 is a tooth shape directly processed and formed on the outer wall of the third transmission shaft 350; the second transmission tooth 320 can be set separately, if the sixth transmission tooth 351 is a gear structure with internal teeth, then The second transmission tooth 320 can also be extended to engage with the internal teeth on the inner hole of the sixth transmission tooth 351 .

As shown in FIG. 1 , and the third transmission tooth 331 is externally meshed with the fourth transmission tooth 341 , and the fifth transmission tooth 342 is externally meshed with the sixth transmission tooth 351 . In this way, when the driving motor drives the input shaft 100 and the input gear 110 to rotate around the first straight line 1000, the input gear 110 drives the first transmission gear 310, the first transmission shaft 330 and the third transmission gear 331 to rotate around the second straight line 2000, Thereby synchronously drive the fourth transmission gear 341, the second transmission shaft 340 and the fifth transmission gear 342 to rotate around the first straight line 1000, and then drive the sixth transmission gear 351, the third transmission shaft 350 and the second transmission gear 320 to rotate around the second straight line 1000. The straight line 2000 rotates, and then drives the output gear 210 and the output shaft 200 to rotate around the first straight line 1000 .

Preferably, the number of teeth of the sixth transmission teeth 351 is the same as that of the first transmission teeth 310, the number of teeth of the third transmission teeth 331 is the same as that of the second transmission teeth 320, and the number of teeth of the fifth transmission teeth 342 is the same as that of the input teeth 110. Similarly, the number of teeth of the fourth transmission gear 341 is the same as that of the output gear 210 . In this way, after the power output by the driving motor is input through the input shaft 100 , the power can be reduced in speed and increased in torque when output through the output shaft 200 .

It can be understood that the input tooth 110, the output tooth 210, the first transmission tooth 310, the second transmission tooth 320, the third transmission tooth 331, the fourth transmission tooth 341, the fifth transmission tooth 342 and the sixth transmission tooth 351 can be The form of a separate gear can also be an external tooth integrally formed with the outer sidewall of each rotatable shaft (input shaft, output shaft, transmission shaft). For example, the input tooth 110 can be in the form of a separate gear, and the separate gear is assembled on the input shaft 100 in an interference fit or keyed manner; tooth.

In one embodiment, the second transmission shaft 340 is made in one piece, that is, the second transmission shaft 340 is an integral structure, and the fourth transmission tooth 341 and the fifth transmission tooth 342 are formed on the outer wall of the second transmission shaft 340 The integrally formed outer teeth enable the power transmitted from the third transmission gear 331 to be stably and reliably transmitted to the sixth transmission gear 351 through the second transmission shaft 340 .

In another embodiment, the second transmission shaft 340 includes a first transmission sleeve and a second transmission sleeve, that is, the second transmission shaft 340 is a split structure. Specifically, the first transmission sleeve is provided with a fourth transmission tooth 341 , and the second transmission sleeve is provided with a fifth transmission tooth 342 , and the first transmission sleeve and the second transmission sleeve are nested with each other. The first transmission sleeve and the second transmission sleeve can adopt the way of interference fit to realize socket fit. Furthermore, the first transmission sleeve is provided with a sleeve cavity for inserting one end of the second transmission sleeve, and a first connecting hole communicating with the sleeve cavity, and one end of the second transmission sleeve inserted into the sleeve cavity is provided with a The first connecting hole is connected to the second connecting hole, and the first transmission sleeve and the second transmission sleeve are stably and reliably connected as a whole by means of a fastening fit between the first connection hole and the second connection hole. Wherein, the fastening fit between the connecting piece and the first connecting hole and the second connecting hole can be realized by threading the screw and the threaded hole, or by inserting and fitting the bolt and the socket. In this way, the second transmission shaft 340 is assembled through the socket fit between the first transmission sleeve and the second transmission sleeve, so that the first transmission sleeve and the second transmission sleeve can rotate around the first straight line 1000 synchronously.

In order to facilitate the installation of the transmission mechanism in the installation cavity 410, the housing 400 may be configured as a split structure.

As shown in FIG. 2 , in one embodiment, the casing 400 includes a front cover 450 , a box body 460 and a rear cover 470 . Wherein, the first transmission shaft 330 , the second transmission shaft 340 and the third transmission shaft 350 are all rotatably arranged in the box body 460 by means of bearing support. Certainly, the bushing and the retaining ring can also be combined so that the first transmission shaft 330 , the second transmission shaft 340 , the third transmission shaft 350 and the box body 460 can be rotated.

Specifically, the front cover 450 , the box body 460 and the rear cover 470 define the installation cavity 410 . Among them, the front cover 450 is provided with an input port 420 and a first connection hole, the box body 460 is provided with a second connection hole corresponding to the first connection hole, and the rear cover 470 is provided with an output port 430 and communicated with the second connection hole. the third connecting hole. As shown in FIG. 2 , the speed reducer 10 also includes a fastener 600 , and the front cover 450 and the box body 460 are fastened together by fastening the fastener 600 with the first connection hole, the second connection hole and the third connection hole. and the rear cover 470 are stably and reliably connected as one, so that the front cover 450 , the box body 460 and the rear cover 470 form the installation cavity 410 .

Wherein, the fastening fit between the fastener 600 and the first connecting hole, the second connecting hole and the third connecting hole can be realized by inserting or screwing, as long as the front cover can be 450, the box body 460 and the rear cover 470 can be stably and reliably connected as one.

In one embodiment, the fastener 600 is configured as a screw and a nut, the first connecting hole, the second connecting hole and the third connecting hole are configured as through holes, and one end of the screw passes through the first connecting hole and the second connecting hole in turn. And the third connecting hole and then threaded with the nut, so that the front cover 450, the box body 460 and the rear cover 470 are locked into one body stably and reliably. Moreover, when the screws pass through the first connecting hole, the second connecting hole and the third connecting hole, they can also guide the assembly of the front cover 450 , the box body 460 and the rear cover 470 to ensure assembly accuracy. Of course, the screw can also be used in combination with a washer to avoid loosening. The outer side of the screw can also be sheathed with a hollow pin, and the hollow pin is used to isolate the screw from the side wall of the through hole to avoid frictional damage.

In another embodiment, there may be multiple fasteners 600. Correspondingly, corresponding first connection holes, second connection holes and third connection holes may be opened in different parts of the housing 400, so that The front cover 450, the box body 460 and the rear cover 470 are assembled and fixed at the positions.

In addition, sealing elements such as gaskets or sealing rings may be provided between the front cover 450 and the box body 460 and between the rear cover 470 and the box body 460 to ensure the sealing of the installation cavity 410 after assembly.

In addition, the box body 460 can be further designed into a split mechanism, which is convenient for processing and manufacturing and reduces processing difficulty.

As shown in Figure 2, in one embodiment, the box body 460 includes a front box body 461 close to the front cover 450, a rear box body 463 close to the rear cover 470, and a The middle box body 462 , the front box body 461 , the middle box body 462 and the rear box body 463 are all provided with connection holes to communicate with each other to form a second connection hole. Sealing elements such as gaskets or sealing rings may also be arranged between the front box body 461 , the middle box body 462 and the rear box body 463 .

It should be noted that "a certain body" and "a certain part" can be part of the corresponding "component", that is, "a certain body" and "a certain part" are integrally formed with other parts of the "component"; "Other parts of" an independent component that can be separated, that is, "a certain body" and "a certain part" can be manufactured independently, and then combined with "other parts of the component" to form a whole. The expression of the above-mentioned "a certain body" and "a certain part" in this application is only one of the embodiments. For the convenience of reading, it is not intended to limit the scope of protection of the application. As long as the above-mentioned features are included and the functions are the same, it should be understood The technical scheme equivalent to this application.

It should be noted that the components contained in the "units", "components", "mechanisms" and "device" of the present application can also be combined flexibly, so that modular production can be carried out according to actual needs, so as to facilitate modular assembly. The division of the above-mentioned components in this application is only one of the embodiments. For the convenience of reading, it is not intended to limit the scope of protection of this application. As long as the above-mentioned components are included and have the same function, it should be understood as an equivalent technical solution of this application.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial ", "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying No device or element must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the invention. The term "and/or" used in the present application includes any and all combinations of one or more related listed items.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In this utility model, unless otherwise specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrated; may be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediary, and may be an internal communication between two elements or an interactive relationship between two elements, unless otherwise stated Clearly defined. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first feature and the second feature through an intermediary indirect contact. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

It should be noted that when an element is referred to as being "fixed on", "disposed on", "fixed on" or "installed on" another element, it can be directly on the other element or there can also be an intervening element . When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. Furthermore, when one element is considered to be "fixed transmission connection" to another element, the two can be fixed in a detachable connection, or can be fixed in a non-detachable connection, as long as power transmission can be realized, such as socket, snap-in , integral molding, fixing, welding, etc., can be realized in the prior art, and are no longer cumbersome here. When a component is perpendicular or nearly perpendicular to another component, it means that the ideal state of the two is vertical, but due to the influence of manufacturing and assembly, there may be a certain vertical error. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of illustration only and are not intended to represent the only embodiments. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

It should also be understood that when explaining the connection relationship or positional relationship of elements, although not explicitly described, the connection relationship and positional relationship are interpreted as including an error range, and the error range should be accepted by a specific value determined by those skilled in the art. within the range of deviation. For example, "about," "approximately," or "substantially" can mean within one or more standard deviations, without limitation.

The technical features of the above embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be It is considered to be within the range described in this specification.

The above examples only express several implementations of the utility model, and the description thereof is more specific and detailed, but it should not be understood as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the utility model patent should be based on the appended claims.

Claims (12)

1. A speed reducer, comprising:

the input shaft is provided with input teeth;

the output shaft and the input shaft are arranged at intervals, an output tooth is arranged on the output shaft, the number of teeth of the output tooth is greater than that of the input tooth, and the central axis of the input shaft is collinear with that of the output shaft; and

drive mechanism, drive mechanism includes first driving tooth and the second driving tooth that the transmission is connected, first driving tooth with input tooth external toothing, the second driving tooth with output tooth external toothing, the central axis of first driving tooth with the central axis collineation of second driving tooth, just the central axis of first driving tooth with the central axis of input shaft is parallel to each other and the interval sets up.

2. The decelerator of claim 1, further comprising a housing, the housing having a mounting cavity, an input port in communication with the mounting cavity, and an output port in communication with the mounting cavity, wherein the input shaft is rotatably disposed within the input port such that the input teeth are disposed within the mounting cavity, the output shaft is rotatably disposed within the output port such that the output teeth are disposed within the mounting cavity, and the drive mechanism is disposed within the mounting cavity.

3. The reducer according to claim 2, wherein the first transmission tooth and the second transmission tooth are located on one side of a central axis of the input shaft, the housing is further provided with an oil injection passage communicating with the mounting cavity, and the oil injection passage is located on the other side of the central axis of the input shaft.

4. The decelerator of claim 3, further comprising a blocking piece disposed within and blocking the oiling channel.

5. The decelerator of claim 4, further comprising a seal in sealing engagement with both the inner sidewall of the oil injection passage and the blanking member.

6. The reducer according to any one of claims 2 to 5, wherein the transmission mechanism further includes a first transmission shaft, a second transmission shaft, and a third transmission shaft, the first transmission shaft, the second transmission shaft, and the third transmission shaft are rotatably disposed in the mounting cavity, the central axis of the first transmission shaft and the central axis of the input shaft are parallel to each other and spaced apart from each other, the first transmission teeth are disposed on an outer sidewall of the first transmission shaft and rotate synchronously with the first transmission shaft, the outer sidewall of the first transmission shaft is further provided with third transmission teeth that rotate synchronously with the second transmission shaft, the second transmission shaft is disposed between the input shaft and the output shaft, the central axis of the second transmission shaft and the central axis of the input shaft are provided with fourth transmission teeth and fifth transmission teeth that are spaced apart from each other and rotate synchronously with the second transmission shaft, the central axis of the third transmission shaft and the central axis of the first transmission shaft are provided with collinear transmission teeth, the second transmission teeth are disposed on an outer sidewall of the third transmission shaft and rotate synchronously with the third transmission teeth, the outer sidewall of the third transmission shaft is further provided with sixth transmission teeth, and the sixth transmission teeth are meshed with the sixth transmission teeth.

7. The speed reducer of claim 6, wherein the number of the sixth transmission teeth is the same as the number of the first transmission teeth, the number of the third transmission teeth is the same as the number of the second transmission teeth, the number of the fifth transmission teeth is the same as the number of the input teeth, and the number of the fourth transmission teeth is the same as the number of the output teeth.

8. The speed reducer of claim 6, wherein the second drive shaft is integrally formed; or the second transmission shaft comprises a first transmission sleeve and a second transmission sleeve, the first transmission sleeve is provided with the fourth transmission gear, the second transmission sleeve is provided with the fifth transmission gear, and the first transmission sleeve and the second transmission sleeve are mutually sleeved.

9. The decelerator according to claim 6, wherein the housing includes a front cover, a box body, and a rear cover, the front cover, the box body, and the rear cover enclosing the installation cavity, the front cover being provided with the input port and a first connection hole, the box body being provided with a second connection hole correspondingly communicating with the first connection hole, the rear cover being provided with the output port and a third connection hole correspondingly communicating with the second connection hole, the decelerator further including a fastening member, the fastening member being tightly engaged with the first connection hole, the second connection hole, and the third connection hole.

10. The reducer according to claim 6, wherein the first transmission gear is a gear structure sleeved on an outer side wall of the first transmission shaft; the sixth transmission gear is a gear structure sleeved on the outer side wall of the third transmission shaft.

11. Decelerator according to any one of claims 1 to 5, wherein the input shaft has an input for connection to a drive motor;

the driving motor is provided with a flat square output shaft, the input end is provided with a first jack for the flat square output shaft to be inserted into, and the shape of the cross section of the first jack is matched with that of the cross section of the flat square output shaft;

or the speed reducer further comprises a connecting sleeve and a lock pin, the driving motor is provided with a cylindrical output shaft and a first groove arranged on the outer side wall of the cylindrical output shaft, the input end is provided with a second jack used for inserting the cylindrical output shaft and a second groove arranged on the side wall of the second jack and penetrating through the outer side wall of the cylindrical output shaft, the second groove can be communicated with the first groove to form a mounting groove for mounting the lock pin, and the connecting sleeve is arranged on the outer side wall of the input end and limits the lock pin.

12. A power transmission device comprising a drive motor and a speed reducer according to any one of claims 1 to 11, the drive motor being in driving connection with the input shaft.

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