CN218152257U

CN218152257U - Power transmission device and speed reducer

Info

Publication number: CN218152257U
Application number: CN202221704363.XU
Authority: CN
Inventors: 郭毅军; 张新云; 杨永波
Original assignee: Chongqing Xishan Science and Technology Co Ltd
Current assignee: Chongqing Xishan Science and Technology Co Ltd
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2022-12-27
Anticipated expiration: 2032-06-30

Abstract

The utility model relates to a power transmission device and reduction gear, the power that driving motor input to the input shaft drives the input tooth and rotates to drive first driving tooth in step and rotate, and then drive the synchronous rotation of second driving tooth, then drive output tooth in step and rotate and finally drive the output shaft and rotate and export power with one heart. And because the central axis of the first transmission gear and the central axis of the input shaft are parallel to each other and arranged at intervals, namely the first straight line and the second straight line are parallel to each other and arranged at intervals, the power can be stably transmitted on the two parallel straight lines, compared with the traditional planetary reducer, the problem of overlarge centrifugal force can be avoided, and the high-rotation-speed rotation requirement can be met.

Description

Power transmission device and speed reducer

Technical Field

The utility model relates to a power machinery technical field especially relates to a power transmission device and reduction gear.

Background

The speed reducers are usually arranged on various power transmission devices to achieve the purposes of reducing the rotating speed, increasing the output torque and reducing the load inertia. For example, a planetary reduction gear is generally used in a micro-power detection device. However, when the rotation speed of the planetary reducer is increased to 100000rpm or more during use, the centrifugal force of the high-speed rotation of the planet gear is too large to meet the rotation requirement of high rotation speed.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a power transmission device and a speed reducer for solving the problem that the conventional speed reducer cannot meet the rotation requirement of high rotation speed.

The technical scheme is as follows:

in one aspect, there is provided a decelerator 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.

The technical solution is further explained as follows:

in one embodiment, the speed reducer further comprises a housing, the housing is provided with a mounting cavity, an input port communicated with the mounting cavity, and an output port communicated with the mounting cavity, the input shaft is rotatably arranged in the input port to enable the input teeth to be arranged in the mounting cavity, the output shaft is rotatably arranged in the output port to enable the output teeth to be arranged in the mounting cavity, and the transmission mechanism is arranged in the mounting cavity.

In one embodiment, the first transmission tooth and the second transmission tooth are located on one side of the central axis of the input shaft, the housing is further provided with an oil injection channel communicated with the mounting cavity, and the oil injection channel is located on the other side of the central axis of the input shaft.

In one embodiment, the speed reducer further comprises a blocking piece, and the blocking piece is arranged in the oil injection channel and blocks the oil injection channel.

In one embodiment, the speed reducer further comprises a sealing element, and the sealing element is in sealing fit with the inner side wall of the oil filling channel and the blocking element.

In one embodiment, 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 installation cavity, the central axis of the first transmission shaft and the central axis of the input shaft are parallel to each other and are disposed at intervals, the first transmission gear is disposed on the outer side wall of the first transmission shaft and rotates synchronously with the first transmission shaft, the outer side wall of the first transmission shaft is further provided with a third transmission gear rotating synchronously, 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 collinear, the outer side wall of the second transmission shaft is provided with a fourth transmission gear and a fifth transmission gear rotating synchronously with the second transmission shaft, the central axis of the third transmission shaft and the central axis of the first transmission shaft are collinear, the second transmission gear is disposed on the outer side wall of the third transmission shaft and rotates synchronously with the third transmission shaft, the outer side wall of the third transmission shaft is further provided with a sixth transmission gear rotating synchronously, the third transmission gear and the fourth transmission gear are meshed with the outer transmission gear, and the fifth transmission gear.

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

In one embodiment, the second transmission 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.

In one embodiment, the casing includes a front cover, a box body, and a rear cover, the front cover, the box body, and the rear cover enclose the installation cavity, the front cover is provided with the input port and the first connection hole, the box body is provided with a second connection hole correspondingly communicated with the first connection hole, the rear cover is provided with the output port and a third connection hole correspondingly communicated with the second connection hole, and the speed reducer further includes a fastening member, and the fastening member is fastened and matched with the first connection hole, the second connection hole, and the third connection hole.

In one embodiment, the first transmission gear is a gear structure sleeved on the 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.

In one embodiment, 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.

On the other hand, the power transmission device comprises a driving motor and the speed reducer, wherein the driving motor is in transmission connection with the input shaft.

According to the power transmission device and the speed reducer of the embodiment, the power input to the input shaft by the driving motor drives the input teeth to rotate, so that the first transmission teeth are synchronously driven to rotate, the second transmission teeth are further driven to synchronously rotate, then the output teeth are synchronously driven to rotate, and finally the output shaft is driven to rotate to concentrically output the power. And because the central axis of the first transmission gear and the central axis of the input shaft are parallel to each other and arranged at intervals, namely the first straight line and the second straight line are parallel to each other and arranged at intervals, the power can be stably transmitted on the two parallel straight lines, compared with the traditional planetary reducer, the problem of overlarge centrifugal force can be avoided, and the high-rotation-speed rotation requirement can be met.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a cross-sectional view of one embodiment of a retarder from a perspective;

fig. 2 is a cross-sectional view of the retarder of fig. 1 from another perspective.

Description of reference numerals:

10. a speed reducer; 100. an input shaft; 110. an input tooth; 120. an input end; 1201. a second jack; 1202. a second groove; 1203. connecting sleeves; 200. an output shaft; 210. outputting the teeth; 310. a first drive tooth; 320. a second gear; 330. a first drive shaft; 331. a third transmission gear; 340. a second drive shaft; 341. a fourth gear; 342. a fifth gear; 350. a third drive shaft; 351. a sixth gear; 400. a housing; 410. a mounting cavity; 420. an input port; 430. an output port; 440. an oil injection channel; 450. a front cover; 460. a box body; 461. a front box body; 462. a middle box body; 463. a rear box body; 470. a rear cover; 500. a blocking piece; 600. a fastener; 1000. a first straight line; 2000. a second straight line.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In one embodiment, a power transmission device is provided, which includes a driving motor (not shown) and a decelerator 10.

The driving motor is in transmission connection with the speed reducer 10, so that the output rotating speed of the driving motor is reduced by the speed reducer 10, the output torque of the driving motor is increased, and the load inertia of the driving motor is reduced. The reduction gear 10 can also meet the rotation demand at a high rotation speed.

As shown in fig. 1, in one embodiment, the 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 through the output shaft 200.

The transmission connection between the input shaft 100 and the driving motor can be realized in a sleeve connection mode or in a plug connection mode, and only the requirement for power transmission can be met.

As shown in fig. 1, in one embodiment, the input shaft 100 has an input end 120 connected to a drive motor. The drive motor has a flat square output shaft 200. Wherein, offer on input 120 and supply flat side output shaft 200 male first jack, so, insert flat side output shaft 200 in the first jack of input shaft 100, because the cross sectional profile shape of first jack and flat side output shaft 200's cross sectional profile phase-match, can make the lateral wall of flat side output shaft 200 contradict the cooperation with the inside wall of first jack, thereby can hold in range input shaft 100 when flat side output shaft 200 rotates and rotate, and then realize the input transmission of power.

The cross-sectional profile of the oblate output shaft 200 may be rectangular, rhombic, or the like.

In another embodiment, the input shaft 100 has an input end 120 connected to a driving motor, and the input end 120 is provided with a second insertion hole 1201 and a second groove 1202 provided to a sidewall of the second insertion hole 1201 and penetrating to an outer sidewall of the cylindrical output shaft. The reducer 10 further includes a coupling sleeve 1203 and a locking pin. Moreover, driving motor has cylinder output shaft 200 and sets up in the first groove of the lateral wall of cylinder output shaft 200, insert cylinder output shaft 200 in second jack 1201 for first groove corresponds the intercommunication with second groove 1202 and forms the mounting groove, install the lockpin in the mounting groove, thereby utilize the lockpin to be connected input 120 and cylinder output shaft 200, thereby can hold in the same time when cylinder output shaft 200 rotates and move input shaft 100 and rotate, and then realize the input transmission of power. In addition, the connecting sleeve 1203 is sleeved on the outer side wall of the input end 120 and limits the locking pin, so that the locking pin can be prevented from falling off from the mounting groove by using the limiting effect of the connecting sleeve 1203, the stability and reliability of the assembly connection of the input shaft 100 and the cylindrical output shaft 200 are ensured, and the power can be transmitted stably and reliably.

Of course, in other embodiments, the second groove may not extend through to the outer sidewall of the cylindrical output shaft, and only need to enable the lock pin to be placed in the mounting groove to connect the cylindrical output shaft with the input end.

As shown in fig. 1 and fig. 2, an input tooth 110 is disposed at an end of the input shaft 100 away from the driving motor, and the input tooth 110 can be driven to rotate concentrically when the input shaft 100 rotates.

As shown in fig. 1 and 2, the output shaft 200 is spaced apart from the input shaft 100. Output teeth 210 are provided at one end of the output shaft 200 close to the input shaft 100.

At the same time, the central axis of the input shaft 100 is collinear with the central axis of the output shaft 200, i.e., the input shaft 100 and the output shaft 200 rotate about a common first line 1000.

As shown in fig. 1, the transmission mechanism includes a first transmission tooth 310 and a second transmission tooth 320 that are in transmission connection with each other, i.e., the power of the first transmission tooth 310 can be transmitted to the second transmission tooth 320.

Specifically, the first transmission teeth 310 are in external engagement with the input teeth 110, such that the first transmission teeth 310 can rotate synchronously with the input teeth 110; the second drive dog 320 is in external engagement with the output dog 210 such that the second drive dog 320 is able to rotate synchronously with the output dog 210. At the same time, the central axis of the first gear tooth 310 is collinear with the central axis of the second gear tooth 320, i.e., the first gear tooth 310 and the second gear tooth 320 rotate about a common second straight line 2000. Thus, the power input to the input shaft 100 by the driving motor drives the input teeth 110 to rotate, so as to synchronously drive the first transmission teeth 310 to rotate, further drive the second transmission teeth 320 to synchronously rotate, further synchronously drive the output teeth 210 to rotate, and finally drive the output shaft 200 to rotate to concentrically output the power. In addition, since the central axis of the first transmission gear 310 and the central axis of the input shaft 100 are parallel to each other and spaced apart from each other, that is, the first straight line 1000 and the second straight line 2000 are parallel to each other and spaced apart from each other, power is smoothly transmitted on the two parallel straight lines, and compared with the conventional planetary reducer 10, the problem of an excessively large centrifugal force does not exist, and the planetary reducer can meet the rotation requirement of a high rotation speed.

As shown in fig. 1, more specifically, the decelerator 10 further includes a housing 400. The housing 400 is provided with a mounting chamber 410, an input port 420 communicating with the mounting chamber 410, and an output port 430 communicating with the mounting chamber 410.

As shown in fig. 1, a portion of the input shaft 100 is rotatably disposed in the input port 420 by using a bearing support or the like, and the input teeth 110 are disposed in the mounting cavity 410, that is, one end of the input shaft 100 extends out of the mounting cavity 410 and is in transmission connection with the driving motor, and the other end of the input shaft 100 passes through the input port 420 and extends into the mounting cavity 410 and is provided with the input teeth 110. Of course, a bushing and retainer ring may also be incorporated such that the input shaft 100 is rotatably disposed through the input port 420.

As shown in fig. 1, a portion of the output shaft 200 is rotatably disposed in the output port 430 by using a bearing support or the like, and the output tooth 210 is disposed in the mounting cavity 410, that is, one end of the output shaft 200 extends out of the mounting cavity 410 and is in transmission connection with an external load, and the other end of the output shaft 200 passes through the output port 430 and extends into the mounting cavity 410 and is provided with the output tooth 210. Of course, a bushing and retainer ring may also be incorporated such that the output shaft 200 is rotatably disposed through the output port 430.

As shown in fig. 1, meanwhile, the transmission mechanism is disposed in the installation cavity 410, that is, both the first transmission tooth 310 and the second transmission tooth 320 can be rotatably disposed in the installation cavity 410.

Further, as shown in fig. 1, the first transmission tooth 310 and the second transmission tooth 320 are located on one side of the central axis of the input shaft 100. Moreover, the housing 400 is further provided with an oil injection channel 440 communicated with the mounting 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 other side opposite to the first straight line 1000, so that the arrangement of the first transmission teeth 310 and the second transmission teeth 320 does not interfere with the opening of the oil injection channel 440, and the overall layout of the speed reducer 10 is more compact.

As shown in fig. 1, in an embodiment, the first transmission teeth 310 and the second transmission teeth 320 are disposed at a lower side of the first straight line 1000, and the oil injection channel 440 is opened at an upper side of the first straight line 1000, so that lubricating oil can be injected into the installation cavity 410 through the oil injection channel 440 from top to bottom, which is simple and convenient, and leakage during the oil injection is avoided.

Of course, in other embodiments, the first transmission teeth 310 and the second transmission teeth 320 may be disposed on the upper side of the first straight line 1000, the oil injection channel 440 is opened on the lower side of the first straight line 1000, and the oil injection channel 440 may be filled with the lubricating oil by providing a check valve therein.

As shown in fig. 1, further, the decelerator 10 further includes a blocking member 500. The blocking piece 500 is disposed in the oil injection passage 440, so that the oil injection passage 440 is blocked by the blocking piece 500 to prevent the lubricating oil from leaking from the installation cavity 410.

The plugging member 500 may be in the form of a plugging screw or a plugging plug.

Specifically, the blocking member 500 is provided as a blocking screw, an inner side wall of the oil injection passage 440 is provided with an internal thread in threaded connection with the blocking screw, and the oil injection passage 440 is blocked by screwing the blocking screw into the oil injection passage 440.

Still further, the decelerator 10 further includes a sealing member, and the sealing member is in sealing engagement with both the inner side wall of the oil filling passage 440 and the blocking piece 500. Therefore, the sealing effect on the oil filling channel 440 is further improved through the sealing element, and the lubricating oil is prevented from leaking out of the oil filling channel 440.

The sealing element can be in the form of a sealing ring, a sealing sleeve or a sealing gasket.

Specifically, the oil injection channel 440 is provided with a counter bore with an internal thread, the plugging member 500 is provided with a plugging screw, the sealing member is provided with an O-shaped sealing ring, the O-shaped sealing ring is provided on the bottom wall of the counter bore, and when the plugging screw is screwed into the counter bore, the head of the plugging screw extrudes the O-shaped sealing ring to realize sealing fit.

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

The central axis of the first transmission shaft 330 and the central axis of the input shaft 100 are parallel to each other and spaced apart, 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 an outer side wall of the first transmission shaft 330 and rotates synchronously with the first transmission shaft 330, and a third transmission gear 331 which rotates synchronously is disposed on an outer side wall of the first transmission shaft 330.

Wherein, first transmission gear 310 can be the profile of tooth of direct machine-shaping on the lateral wall of first transmission shaft 330, also can be the gear structure of cover on first transmission shaft 330 lateral wall, this gear structure can combine interference fit's mode to realize rotating with first transmission shaft 330 is synchronous through the shaft hole cooperation, also can set up the external tooth on the lateral wall of first transmission shaft 330 and set up the internal tooth on the hole of first transmission gear 310, realize through the meshing of internal tooth and external tooth, can also realize through key and keyway complex form.

The third transmission gear 331 is a tooth shape directly formed on the outer side wall of the first transmission shaft 330; the third transmission gear 331 may be provided separately, and if the first transmission gear 310 has a gear structure with internal teeth, the third transmission gear 331 may also be extended to be engaged with the internal teeth on the inner hole of the first transmission gear 310.

As shown in fig. 1, the second transmission shaft 340 is disposed between the input shaft 100 and the output shaft 200. Also, the center axis of the second transmission shaft 340 is collinear with the center axis of the input shaft 100, i.e., the center axis of the second transmission shaft 340 is located on the first straight line 1000. Meanwhile, the outer side wall of the second transmission shaft 340 is provided with a fourth transmission gear 341 and a fifth transmission gear 342 which are arranged at intervals 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, wherein the central axis of the third drive shaft 350 is collinear with the central axis of the first drive shaft 330, i.e., the central axis of the third drive shaft 350 lies on a second line 2000. The second transmission gear 320 is disposed on an outer side wall of the third transmission shaft 350 and rotates synchronously with the third transmission shaft 350, and a sixth transmission gear 351 which rotates synchronously is disposed on an outer side wall of the third transmission shaft 350.

Wherein, sixth driving gear 351 can be the profile of tooth of direct machine-shaping on the lateral wall of third transmission shaft 350, also can be the gear structure of cover on locating the lateral wall of third transmission shaft 350, this gear structure can combine interference fit's mode to realize rotating with third transmission shaft 350 synchronization through the shaft hole cooperation, also can set up the external tooth on the lateral wall of third transmission shaft 350 and set up the internal tooth on sixth driving gear 351's hole, the meshing through internal tooth and external tooth realizes, can also realize through key and keyway complex form.

The second transmission gear 320 is a tooth shape directly formed on the outer side wall of the third transmission shaft 350; the second transmission teeth 320 may be provided separately, or if the sixth transmission teeth 351 have a gear structure in which internal teeth are provided, the second transmission teeth 320 may be extended to be engaged with the internal teeth of the inner hole of the sixth transmission teeth 351.

As shown in fig. 1, the third gear 331 is in external engagement with the fourth gear 341, and the fifth gear 342 is in external engagement with the sixth gear 351. Thus, when the driving motor drives the input shaft 100 and the input teeth 110 to rotate around the first straight line 1000, the input teeth 110 drive the first transmission teeth 310, the first transmission shaft 330 and the third transmission teeth 331 to rotate around the second straight line 2000, so as to synchronously drive the fourth transmission teeth 341, the second transmission shaft 340 and the fifth transmission teeth 342 to rotate around the first straight line 1000, further drive the sixth transmission teeth 351, the third transmission shaft 350 and the second transmission teeth 320 to rotate around the second straight line 2000, and further drive the output teeth 210 and the output shaft 200 to rotate around the first straight line 1000.

Preferably, the number of teeth of sixth driving gear 351 is the same as the number of teeth of first driving gear 310, the number of teeth of third driving gear 331 is the same as the number of teeth of second driving gear 320, the number of teeth of fifth driving gear 342 is the same as the number of teeth of input gear 110, the number of teeth of fourth driving gear 341 is the same as the number of teeth of output gear 210, so, the power of driving motor output passes through input shaft 100 and inputs the back, can realize the speed reduction of power and increase the torsion when exporting through output shaft 200.

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

In one embodiment, the second transmission shaft 340 is integrally formed, that is, the second transmission shaft 340 is an integral structure, and the fourth transmission gear 341 and the fifth transmission gear 342 are external gears integrally formed on the outer side wall of the second transmission shaft 340, so that the power transmitted by the third transmission gear 331 can 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, i.e. the second transmission shaft 340 is a split structure. Specifically, the first driving sleeve is provided with a fourth driving gear 341, the second driving sleeve is provided with a fifth driving gear 342, and the first driving sleeve and the second driving sleeve are sleeved with each other. The first transmission sleeve and the second transmission sleeve can realize sleeve joint fit in an interference fit mode. Furthermore, the first transmission sleeve is provided with a sleeve connection cavity for inserting one end of the second transmission sleeve and a first connection hole communicated with the sleeve connection cavity, the end, inserted into the sleeve connection cavity, of the second transmission sleeve is provided with a second connection hole correspondingly communicated with the first connection hole, and the first transmission sleeve and the second transmission sleeve are stably and reliably connected into a whole in a fastening and matching mode of a connecting piece and the first connection hole and the second connection hole. The connecting piece is in fastening fit with the first connecting hole and the second connecting hole, can be realized in a mode of threaded connection with a threaded hole through a screw, and can also be realized in a mode of inserting and connecting fit through a plug pin and a jack. Thus, the second transmission shaft 340 is assembled by the sleeve connection between the first transmission sleeve and the second transmission sleeve, so that the first transmission sleeve and the second transmission sleeve can synchronously rotate around the first straight line 1000.

To facilitate installation of the transmission mechanism in the mounting cavity 410, the housing 400 may be provided as a split structure.

As shown in FIG. 2, in one embodiment, the housing 400 includes a front cover 450, a case 460, and a rear cover 470. The first transmission shaft 330, the second transmission shaft 340 and the third transmission shaft 350 are rotatably disposed in the box 460 by bearing support. Of course, it is also possible to combine the bushing and the retainer ring to rotatably arrange the first transmission shaft 330, the second transmission shaft 340, and the third transmission shaft 350 with the case 460.

Specifically, the front cover 450, the case 460, and the rear cover 470 enclose the installation cavity 410. The front cover 450 has an input port 420 and a first connection hole, the box 460 has a second connection hole correspondingly connected to the first connection hole, and the rear cover 470 has an output port 430 and a third connection hole correspondingly connected to the second connection hole. As shown in fig. 2, the reducer 10 further includes a fastener 600, and the front cover 450, the box 460 and the rear cover 470 are stably and reliably connected into a whole by fastening and matching the fastener 600 with the first connecting hole, the second connecting hole and the third connecting hole, so that the front cover 450, the box 460 and the rear cover 470 enclose the installation cavity 410.

The fastening piece 600 is fastened and matched with the first connecting hole, the second connecting hole and the third connecting hole, the connection can be achieved in an inserting mode, the connection can be achieved in a threaded connection mode, and the front cover 450, the box body 460 and the rear cover 470 can be connected into a whole stably and reliably only through the requirement.

In one embodiment, the fastening member 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, the second connecting hole and the third connecting hole in sequence and then is screwed with the nut, thereby stably and reliably locking the front cover 450, the box body 460 and the rear cover 470 as a whole. In addition, when the screws pass through the first, second and third connection holes, the screws can guide the assembly of the front cover 450, the case 460 and the rear cover 470, thereby ensuring the assembly accuracy. Of course, the screw may also be used in combination with a washer to avoid loosening. The outside of screw can also overlap and establish hollow round pin, utilizes hollow round pin to be separated from the lateral wall of screw and through-hole absolutely, avoids taking place the friction damage.

In another embodiment, the fastening member 600 may be provided in plurality, and correspondingly, the first connecting hole, the second connecting hole and the third connecting hole may be formed in different portions of the casing 400, so that the front cover 450, the box body 460 and the rear cover 470 can be assembled and fixed in different portions.

In addition, sealing elements such as gaskets or sealing rings can be arranged between the front cover 450 and the box body 460 and between the rear cover 470 and the box body 460, so that the sealing performance of the mounting cavity 410 after assembly is ensured.

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

As shown in fig. 2, in one embodiment, the case 460 includes a front case 461 adjacent to the front cover 450, a rear case 463 adjacent to the rear cover 470, and an intermediate case 462 located between the front case 461 and the rear case 463, and the front case 461, the intermediate case 462 and the rear case 463 are provided with connection holes to communicate with each other to form a second connection hole. Sealing elements such as gaskets and packing may be provided between the front case 461, the intermediate case 462, and the rear case 463.

The "certain body" and the "certain portion" may be a part corresponding to the "member", that is, the "certain body" and the "certain portion" may be integrally formed with the other part of the "member"; or an independent component which can be separated from other parts of the component, namely a certain body and a certain part can be manufactured independently and combined with other parts of the component into a whole. The expressions "a certain part" and "a certain part" in the present application are only one embodiment, and are not intended to limit the scope of the present application for reading convenience, and should be construed as equivalents of the present application as long as the features are included and the effects are the same.

It should be noted that, the components included in the "unit", "assembly", "mechanism" and "device" of the present application can also be flexibly combined, i.e., can be produced in a modularized manner according to actual needs, so as to facilitate the modularized assembly. The division of the above components in the present application is only one of the embodiments, which is convenient for reading and does not limit the scope of protection of the present application, and as long as the above components are included and the functions are the same, it should be understood that the present application is an equivalent technical solution.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. The term "and/or" as used in this disclosure includes any and all combinations of one or more of the associated listed items.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to," "disposed on," "secured to," or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. 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. Further, when one element is considered as "fixed transmission connection" with another element, the two elements may be fixed in a detachable connection manner or in an undetachable connection manner, and power transmission can be achieved, such as sleeving, clamping, integrally-formed fixing, welding and the like, which can be achieved in the prior art, and is not cumbersome. When an element is perpendicular or nearly perpendicular to another element, it is desirable that the two elements are perpendicular, but some vertical error may exist due to manufacturing and assembly effects. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not 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 in explaining the connection relationship or the positional relationship of the elements, although not explicitly described, the connection relationship and the positional relationship are interpreted to include an error range which should be within an acceptable deviation range of a specific value determined by those skilled in the art. For example, "about", "approximately" or "substantially" may mean within one or more standard deviations, and is not limited thereto.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A speed reducer, comprising:

the input shaft is provided with input teeth;

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;

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.