CN109067082B - Motor shaft reduction gears - Google Patents
Motor shaft reduction gears Download PDFInfo
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- CN109067082B CN109067082B CN201810986902.5A CN201810986902A CN109067082B CN 109067082 B CN109067082 B CN 109067082B CN 201810986902 A CN201810986902 A CN 201810986902A CN 109067082 B CN109067082 B CN 109067082B
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- motor shaft
- motor
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- sleeve
- rear end
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/102—Structural association with clutches, brakes, gears, pulleys or mechanical starters with friction brakes
Abstract
The invention relates to the technical field of motors, in particular to a motor shaft speed reducing mechanism which comprises a motor shaft and a motor rear end cover, wherein a friction sleeve which is in contact with the end surface of the motor shaft is arranged at the end part of the motor shaft, the friction sleeve is connected onto the motor rear end cover, an elastic part which enables the friction sleeve to be attached to the end surface of the motor shaft is arranged between the motor rear end cover and the friction sleeve, the end surface friction is realized, the motor shaft has self-locking force in a power-off state, the rotation inertia is eliminated, and the speed reducing or rotation stopping effect is good.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a motor shaft stop speed reducing mechanism.
Background
The existing motor is not provided with a speed reducing mechanism, so that after the motor is rotated at a high speed and is powered off, the motor can continue to rotate for a period of time due to the existence of inertia, the vehicle can be stopped only by depending on the friction resistance of the motor, and the speed reducing effect is poor. And the motor shaft does not have the auto-lock ability, can't satisfy and need to have the operating mode that the auto-lock required to use down.
The mode of braking is generally adopted in the speed reduction of motor shaft or the brake of motor with reduction gears motor, sets up a plurality of friction discs that are the annular and distribute at the outer peripheral face of motor shaft, through applying radial ascending power to the friction disc, makes the friction disc hold tightly on the outer peripheral face of motor shaft to realize the speed reduction or the braking effect of motor shaft, there are two drawbacks in this kind of mode: the friction plate is easy to cause a motor shaft fault, the friction plate can abrade the surface of the motor shaft, axial runout of the motor shaft can be caused, the motor is unstable in operation, the service life of the motor is shortened, and the normal use of the motor is influenced.
Disclosure of Invention
The invention aims to solve the technical problem of providing a motor shaft speed reducing mechanism which has the advantages of end surface friction, self-locking force of a motor shaft, elimination of inertial rotation and good speed reducing or rotation stopping effect.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a motor shaft speed reducing mechanism comprises a motor shaft and a motor rear end cover, wherein a friction sleeve in contact with the end face of the motor shaft is arranged at the end part of the motor shaft and connected to the motor rear end cover, and an elastic part for enabling the friction sleeve to be attached to the end face of the motor shaft is arranged between the motor rear end cover and the friction sleeve.
Furthermore, the friction sleeve is arranged at the position corresponding to the end part of the motor shaft in the motor rear end cover, a positioning protrusion embedded into the motor rear end cover is arranged on the side, close to the motor rear end cover, of the friction sleeve, a positioning groove matched with the positioning protrusion is arranged at the position corresponding to the motor rear end cover, a sleeving part which extends towards the outer peripheral surface of the motor shaft and is sleeved on the outer peripheral surface of the end part of the motor shaft is arranged on one side, close to the motor shaft, of the friction sleeve, the sleeving part and the friction sleeve are integrally formed, and the elastic piece is a spring sleeved outside the speed reducing plate.
Further, the outer peripheral face of the sleeve-joint part is provided with a conical surface section, the larger end of the conical surface section is far away from one side of the rear end cover of the motor, the outer diameter of the smaller end of the conical surface section is consistent with the outer diameter of the sleeve-joint part, the axial length part of the conical surface section is not larger than the axial length of the sleeve-joint part, the outer diameter of the conical surface section is gradually increased from the smaller end to the larger end, the inner diameter of the spring is not smaller than the outer diameter of the sleeve-joint part and not larger than the maximum outer diameter of the conical surface section, one end of the spring is abutted against the inner wall of the rear end cover of the motor, and the other end of the spring extends to the sleeve-joint part and is abutted against the outer peripheral face of the certain part of the conical surface section of the sleeve-joint part.
Furthermore, the conical surface section is arranged on one side of the sleeve joint part far away from the motor rear end cover, the maximum outer diameter position of the conical surface section is flush with the end part of the sleeve joint part far away from the motor rear end cover, and the end part of the sleeve joint part far away from the motor rear end cover is provided with a boss extending outwards along the radial direction of the motor shaft.
Further, the sleeve joint portion is provided with a plurality of oil storage tanks along the axial direction of the motor shaft, and the plurality of oil storage tanks are uniformly distributed along the circumferential direction of the sleeve joint portion.
Furthermore, the peripheral surface of the friction sleeve is a conical surface, the smaller end of the friction sleeve faces one side of the rear end cover of the motor, the inner diameter of the spring is not smaller than the outer diameter of the minimum position of the friction sleeve and not larger than the outer diameter of the maximum position of the friction sleeve, one end of the spring is abutted against the corresponding position of the inner wall of the rear end cover of the motor, and the other end of the spring is abutted against a certain position of the peripheral surface of the friction sleeve.
Furthermore, the elastic piece is a disc-shaped or arc-shaped elastic piece arranged between the friction sleeve and the rear end cover of the motor.
Furthermore, a pushing mechanism for controlling the friction sleeve to move away from/close to the end part of the motor shaft along the axial direction is arranged on the rear end cover of the motor, and a plurality of friction lines for increasing friction force are arranged on the friction sleeve.
Furthermore, the joint surface of the friction sleeve and the end surface of the motor shaft is a conical surface, and the friction sleeve and the end surface of the motor shaft are matched with each other in structure.
Furthermore, the friction sleeve is arranged outside the rear end cover of the motor, a support for supporting the friction sleeve is arranged outside the rear end cover of the motor, and the elastic piece is a spring arranged between the friction sleeve and the outer wall of the motor shell.
The invention has the beneficial effects that: by adopting the scheme, the friction sleeve which is in contact with the end face of the motor shaft is arranged at the end part of the motor shaft, so that pressure and friction are generated on the end face of the motor shaft, the motor shaft has self-locking force and rotation stopping performance, the motor shaft is braked and decelerated, the deceleration effect is obvious, the friction sleeve is always in contact with the end face of the motor shaft, the inertial rotation of the motor shaft is eliminated, and the mechanism occupies small space compared with the existing brake mechanism and facilitates the reduction of the motor volume.
Drawings
The foregoing and other objects, features, and advantages of the invention will be apparent from the following detailed description taken in conjunction with the accompanying drawings.
Fig. 1 is a schematic cross-sectional structure view of a portion where a friction sleeve is fitted to a rear end cover of a motor in embodiment 1 of the present invention.
Fig. 2 is a schematic cross-sectional view of the sleeve portion in embodiment 1 of the present invention.
Fig. 3 is a schematic structural diagram in an embodiment of the invention.
Fig. 4 is a schematic cross-sectional view of the sleeve portion in embodiment 2 of the present invention.
Fig. 5 is a schematic cross-sectional view of the sleeve joint portion in embodiment 3 of the present invention.
Fig. 6 is a schematic cross-sectional view of the sleeve joint portion in embodiment 4 of the present invention.
Fig. 7 is a schematic cross-sectional view of a joint of the friction sleeve and the end face of the motor shaft in embodiment 5 of the present invention.
Fig. 8 is a schematic cross-sectional view of a joint of the friction sleeve and the end face of the motor shaft in embodiment 6 of the present invention.
FIG. 9 is a schematic end view of a friction sleeve in example 7 of the present invention.
FIG. 10 is a schematic sectional view showing a friction sleeve in example 8 of the present invention.
Fig. 11 is a schematic cross-sectional view of a portion where the friction sleeve is fitted to the rear end cover of the motor in embodiment 9 of the present invention.
Fig. 12 is a schematic cross-sectional view of a portion where the friction sleeve is engaged with the rear end cover of the motor in embodiment 10 of the present invention.
Wherein: 1 is the motor shaft, 2 is the motor rear end cap, 21 is the constant head tank, 22 is the support, 3 is the friction cover, 31 is the location arch, 32 is the portion of cup jointing, 33 is the boss, 34 is the conical surface section, 35 is the oil storage tank, 4 is the spring, 5 is the shell fragment, 6 is the cylinder.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Example 1: referring to fig. 1-3, a motor shaft speed reducing mechanism includes a motor shaft 1 and a motor rear end cover 2, a friction sleeve 3 contacting with an end surface of the motor shaft 1 is arranged at an end of the motor shaft 1, the friction sleeve 3 is made of a high polymer wear-resistant material, the friction sleeve 3 is arranged at an end of the motor rear end cover 2 corresponding to the motor shaft 1, a linear positioning protrusion 31 protruding toward the motor rear end cover 2 is arranged on an end surface of the friction sleeve 3 close to the motor rear end cover 2, a positioning groove 21 matching with the positioning protrusion 31 and matching with the positioning protrusion 31 is arranged at a corresponding position of the motor rear end cover 2, the positioning protrusion 31 is clamped into the positioning groove 21, so that the friction sleeve 3 is positioned by the motor rear end cover 2, the friction sleeve 3 is prevented from rotating, the fixed friction sleeve 3 is contacted with the end surface of the motor shaft in rotation to generate friction, and the speed reducing or stopping rotation of the motor shaft is achieved. One side of the friction sleeve 3 close to the motor shaft 1 is provided with a sleeve part 32 which extends towards the outer peripheral surface of the motor shaft and is sleeved outside the outer peripheral surface at the end part of the motor shaft 1, the sleeve part 32 and the friction sleeve 3 are integrally formed, the friction sleeve 3 is of a sleeved structure sleeved at the end part of the motor shaft, the matching degree between the friction sleeve and the motor shaft is improved, the connection strength is enhanced, the speed reducing effect on the motor shaft is ensured, the outer part of the sleeve part 32 is sleeved with a spring 4 which enables the friction sleeve 3 to be always in contact with the end surface of the motor shaft in a fit manner, the end part of the sleeve part 32 far away from the rear end cover of the motor is provided with a bulge 33 along the radial direction of the motor shaft, the arrangement of the bulge 33 improves the integral structural strength of the friction sleeve, the service life of the friction sleeve is prolonged, the service performance is improved, the outer peripheral surface of the sleeve part 32 at the front side of the bulge is a conical surface section 34, the outer diameter of the smaller end of the conical surface section 34 is consistent with the outer diameter of the sleeve part 32 and is smoothly connected with the outer peripheral surface of the sleeve part 32, the larger end of the conical section 34 is smoothly connected with the boss 33, the outer diameter of the spring 4 is consistent with the outer diameter of the sleeve part, one end of the spring 4 is abutted against the smaller end of the conical section 34, the other end of the spring 4 is abutted against the corresponding position of the inner wall surface of the rear end cover of the motor, the spring 4 is in a compressed state, the elastic force of the spring 4 enables the friction sleeve 3 to always generate pressure on the end surface of the motor shaft 1, the pressure and the static friction force of the friction sleeve and the end surface of the motor shaft enable the motor shaft to have a good self-locking effect under the static state of the motor shaft, the rotation of the motor shaft is avoided, the spring 4 is tightly sleeved outside the sleeve part 33, the arrangement of the conical section 34 generates radial pressure on the conical section by the compressed spring 4, then the inner walls of the conical section 34 and the sleeve part 32 generate pressure on the motor shaft, the effects of reducing the speed and stopping the rotation are realized on the end surface and the outer circumferential surface of the motor shaft, the motor shaft has better self-locking force, the motor shaft keeps static and does not rotate under the condition that the motor is not electrified, the friction sleeve is always contacted with the end surface and the peripheral surface of the motor shaft and has the damping effect of decelerating and stopping rotation of the motor shaft all the time, therefore, when the motor decelerates, the inertial rotation phenomenon of the motor shaft is eliminated, the effects of decelerating, braking and stopping rotation are good, the friction sleeve is arranged at the end part of the rear end cover of the motor, compared with the prior decelerating structure, the space occupied by the mechanism is small, the motor volume is small, the use is convenient, in addition, the decelerating mechanism is suitable for decelerating and stopping rotation of all shaft parts, such as a worm and a transmission rod, in order to reduce the abrasion of the friction sleeve 3 and the sleeving part 32 and prolong the service life of the friction sleeve 3 and the sleeving part 32, a plurality of oil storage tanks 35 along the axial direction of the motor shaft are arranged on the wall surface of the sleeving part 32, and the oil storage tanks 35 are evenly distributed along the circumferential direction of the sleeving part 32, the oil storage tank 35 can be opened on the inner wall surface of the sleeving part 32, and can also penetrate through the inner wall surface to the outer wall surface, lubricating grease is stored in the oil storage tank 35, and when the motor shaft rotates, the lubricating grease enters the joint surface of the sleeving part 32 and the friction sleeve 3, so that the effects of slowing down the friction sleeve 3 and the sleeving part 32 are achieved, and the service life of the friction sleeve and the sleeving part is prolonged.
Example 2: referring to fig. 1 and 4, a motor shaft speed reducing mechanism includes a motor shaft 1, a motor rear end cover 2, a friction sleeve 3 in contact with an end surface of the motor shaft 1 is arranged at an end of the motor shaft 1, the friction sleeve 3 is made of a high polymer wear-resistant material, the friction sleeve 3 is arranged at an end of the motor rear end cover 2 corresponding to the motor shaft 1, a linear positioning protrusion 31 protruding toward the motor rear end cover 2 is arranged on an end surface of the friction sleeve 3 close to the motor rear end cover 2, a positioning groove 21 matched with the positioning protrusion 31 and matched with the positioning protrusion 31 in structure is arranged at a position corresponding to the motor rear end cover 2, the positioning protrusion 31 is clamped into the positioning groove 21, the friction sleeve 3 is positioned by the motor rear end cover 2, the friction sleeve 3 is prevented from rotating, the fixed friction sleeve 3 is in contact with the end surface of the motor shaft in rotation to generate friction force, the effect of reducing or preventing the rotation of the motor shaft is achieved, one side of the friction sleeve 3 close to the motor shaft 1 is provided with an extension towards an outer peripheral surface of the motor shaft and sleeved on an outer peripheral surface of the end of the motor shaft 1 An outer sleeve part 32, the sleeve part 32 and the friction sleeve 3 are integrally formed, the friction sleeve 3 is a sleeve structure sleeved on the end part of the motor shaft, the goodness of fit between the friction sleeve and the motor shaft is improved, the connection strength is enhanced, the deceleration effect on the motor shaft is ensured, the spring 4 which enables the friction sleeve 3 to be always kept in contact with the end surface of the motor shaft is sleeved on the outer part of the sleeve part 32, a bulge 33 along the radial direction of the motor shaft is arranged on the end part of the sleeve part 32 far away from the rear end cover of the motor, the arrangement of the bulge 33 improves the integral structural strength of the friction sleeve, the service life of the friction sleeve is prolonged, the service performance is improved, the outer peripheral surface of the sleeve part 32 is a conical surface, the larger end of the sleeve part 32 is connected with the bulge 3, the spring 4 is sleeved on the outer part 32, the outer diameter of the spring 4 is smaller than the maximum outer diameter of the sleeve part and larger than the minimum outer diameter of the sleeve part, one end of the spring 4 is abutted to a certain part of the outer peripheral surface of the sleeve part 32, the other end of the spring 4 is abutted against the corresponding position of the inner wall surface of the rear end cover of the motor, the spring 4 is in a compressed state, the elastic force of the spring 4 enables the friction sleeve 3 to generate pressure on the end surface of the motor shaft 1 all the time, the pressure and the static friction force of the friction sleeve and the end surface of the motor shaft enable the motor shaft to have a good self-locking effect under the static state of the motor shaft, the motor shaft is prevented from rotating, the spring 4 is tightly sleeved outside the sleeved part 33, the compressed spring 4 generates radial pressure on the sleeved part, then the inner wall of the sleeved part 32 generates pressure on the motor shaft, the effects of reducing speed and stopping rotation are achieved on the end surface and the outer peripheral surface of the motor shaft, the motor shaft has good self-locking force, the motor shaft keeps static state and does not rotate under the condition that the motor shaft is not electrified, and the friction sleeve is always in contact with the end surface and the outer peripheral surface of the motor shaft, and has the effects of reducing speed and stopping rotation, The damping effect of the rotation stopping, therefore, when the motor decelerates, the inertia rotation phenomenon of the motor shaft is eliminated, the deceleration, braking and rotation stopping effects are good, compared with the existing deceleration structure, the deceleration, braking and braking device is arranged at the end part of the rear end cover of the motor, the deceleration, braking and rotation stopping effects are good, the deceleration, the service life of the friction sleeve 3 and the sleeving part 32 is prolonged, in order to reduce the abrasion of the friction sleeve 3 and the sleeving part 32, the service life of the friction sleeve 3 and the sleeving part 32 is prolonged, a plurality of the friction sleeve 32 is provided with the wall surface at the sleeving part 32, the sleeving part 32 is provided with a plurality of oil storage grooves 35, the oil storage 35, the oil storage groove 35 can be opened at the inner wall surface of the sleeving part, which can be penetrated by the inner wall surface of the inner wall of the oil storage groove 35, the oil storage groove, the oil grease, the oil storage groove, the oil grease, the oil is stored in the oil storage groove, the oil grease, the oil is stored in the oil storage groove, the oil is stored in the oil, the oil is stored in the position of the oil storage groove, the oil, and the oil, the oil is stored in the oil, the oil is stored in the oil, and the oil is stored in the oil, the oil is stored in the oil, the position of the sleeving part 32, and the position of the, The sleeving part 32 acts to prolong the service life of the friction sleeve and the sleeving part.
Example 3: referring to fig. 1, a motor shaft speed reducing mechanism, including a motor shaft 1, a motor rear end cap 2, a friction sleeve 3 in end face contact with the motor shaft 1 is arranged at the end of the motor shaft 1, the friction sleeve 3 is made of high polymer wear-resistant material, the friction sleeve 3 is arranged at the end of the motor rear end cap 2 corresponding to the motor shaft 1, a linear positioning protrusion 31 protruding towards the motor rear end cap 2 is arranged at the end face of the friction sleeve 3 close to the motor rear end cap 2, a positioning groove 21 matched with the positioning protrusion 31 and matched with the positioning protrusion 31 is arranged at the corresponding position of the motor rear end cap 2, the positioning protrusion 31 is clamped into the positioning groove 21, positioning of the friction sleeve 3 by the motor rear end cap 2 is realized, rotation of the friction sleeve 3 is avoided, friction force generated by end face contact of the fixed friction sleeve 3 and the rotation of the motor shaft is generated, an effect of reducing or preventing rotation of the motor shaft is achieved, a sleeve 3 side close to the motor shaft 1 is provided with a sleeve extending to the outer peripheral face and sleeved outside the end face of the motor shaft 1, and the end face of the motor shaft is arranged at the end of the friction sleeve 3 close to the motor shaft 1 The connecting part 32, the sleeve part 32 and the friction sleeve 3 are integrally formed, the friction sleeve 3 is of a sleeve structure sleeved on the end part of the motor shaft, the goodness of fit between the friction sleeve and the motor shaft is improved, the connection strength is enhanced, the speed reduction effect on the motor shaft is ensured, the spring 4 which enables the friction sleeve 3 to be always kept in contact with the end surface of the motor shaft in a laminating manner is sleeved on the outer part of the sleeve part 32, the end part of the sleeve part 32, far away from the rear end cover of the motor, is provided with a bulge 33 along the radial direction of the motor shaft, the arrangement of the bulge 33 improves the integral structural strength of the friction sleeve, the service life of the friction sleeve is prolonged, the service performance is improved, referring to fig. 5, the outer circumferential surface of the friction sleeve 3 is conical, the spring 4 is sleeved on the outer circumferential surface of the friction sleeve 3, one end of the spring 4 is abutted to a certain position of the outer circumferential surface of the friction sleeve 3, the other end of the spring 4 is abutted to the corresponding position of the inner wall surface of the rear end cover of the motor, the spring 4 is in a compression state, the spring 4 enables the friction sleeve 3 to always generate pressure on the end surface of the motor shaft 1, under the motor shaft static state, the pressure of friction cover and motor shaft terminal surface, static friction force make the motor shaft have better auto-lock effect, avoid the motor shaft to rotate, the internal diameter of cup joint portion 32 is less than the motor shaft external diameter, or the inner wall of cup joint portion 32 is to the conical surface, the inner wall of cup joint portion 32 produces pressure to the motor shaft outer peripheral face, make the cup joint portion can tightly overlap and establish on the motor shaft, guarantee the contact effect of friction cover to the motor shaft terminal surface, the inner wall of cup joint portion 32 produces the pressure to the motor shaft, play the effect of speed reduction, the effect of stalling to the motor shaft, at the terminal surface of motor shaft, the outer peripheral face all has the speed reduction, the effect of stalling.
Example 4: referring to fig. 1, a motor shaft speed reducing mechanism, including a motor shaft 1, a motor rear end cap 2, a friction sleeve 3 in end contact with a motor shaft 1 is arranged at an end of the motor shaft 1, the friction sleeve 3 is made of a high polymer wear-resistant material, the friction sleeve 3 is arranged at an end of the motor rear end cap 2 corresponding to the motor shaft 1, a cross-shaped positioning protrusion 31 protruding toward the motor rear end cap 2 is arranged at an end face of the friction sleeve 3 close to the motor rear end cap 2, a positioning groove 21 matched with the positioning protrusion 31 and matched with the positioning protrusion 31 in structure is arranged at a position corresponding to the motor rear end cap 2, the positioning protrusion 31 is clamped into the positioning groove 21, so that the friction sleeve 3 is positioned by the motor rear end cap 2, rotation of the friction sleeve 3 is avoided, the friction sleeve 3 is in end contact with the rotating end face to generate friction force, and plays a role of reducing speed or preventing rotation of the motor shaft, a sleeve 3 is arranged at a side close to the motor shaft 1 and extends to an outer peripheral face of the motor shaft and is sleeved outside the outer peripheral face of the motor shaft 1 The connecting part 32 and the sleeving part 32 are integrally formed with the friction sleeve 3, so that the friction sleeve 3 is of a sleeving structure sleeved on the end part of the motor shaft, the goodness of fit between the friction sleeve and the motor shaft is improved, the connection strength is enhanced, and the deceleration effect on the motor shaft is ensured.
Example 5: the difference between this embodiment and embodiment 1 is that, referring to fig. 7, the contact surface between the friction sleeve 3 and the end surface of the motor shaft 1 is a conical surface that is concave toward one side of the friction sleeve 3, the end surface structure of the motor shaft 1 is matched with the structure of the friction sleeve 3, the conical surface is contacted, the contact area is increased, and the friction deceleration and stopping effects are better.
Example 6: the difference between this embodiment and embodiment 1 is that, referring to fig. 8, the contact surface of the friction sleeve 3 and the end surface of the motor shaft 1 is an outward convex conical surface facing the motor shaft, the front end of the conical surface is a plane, and the structure of the end surface of the motor shaft 1 is matched with the structure of the friction sleeve 3, and the contact surface of this structure increases the contact area between the friction sleeve and the end surface of the motor shaft, so that the friction deceleration and stop effects are better.
Example 7: the difference between this embodiment and embodiment 1 is that, referring to fig. 9, a plurality of friction lines 36 are uniformly distributed in a ring shape on the surface where the friction sleeve 3 meets the end face of the motor shaft 1, and the friction lines 36 may be formed by recessing or protruding the surface of the friction sleeve to increase the friction force on the end face of the motor shaft, improve the braking force on the motor shaft, and make the motor shaft have better self-locking force.
Example 8: the difference between this embodiment and embodiment 4 is that, referring to fig. 10, in this embodiment, the friction sleeve 3 is not provided with the sleeve joint portion, the end portion of the motor shaft 1 has a disk structure with an increased outer diameter, the friction sleeve 3 is in contact with the end face of the disk structure outside the motor shaft 1, the contact surface of the disk structure is large, the braking force is strong, and the deceleration and stop effects are good.
Example 9: this example differs from example 1 in that: referring to fig. 11, a pushing mechanism for controlling the friction sleeve 3 to move away from/close to the end of the motor shaft along the axial direction is arranged on the motor rear end cover 2, the pushing mechanism is a cylinder 6 arranged on the motor rear end cover 2 along the axial direction of the motor shaft, the cylinder body of the cylinder 6 is fixed on the motor rear end cover, the output end of the cylinder 6 is connected with the friction sleeve 3, the friction sleeve 3 is controlled to move close to or away from the end face of the motor shaft, when the friction sleeve 3 is in contact with the end face of the motor shaft, a braking effect is generated on the motor shaft, and when the friction sleeve is not in contact with the end face of the motor shaft, the braking effect is not generated, the service life of the friction sleeve and the service life of the motor shaft are prolonged, the abrasion is reduced, and the pushing mechanism can also be other mechanisms capable of realizing linear reciprocating motion, such as an electric push rod and a linear stepping motor.
Example 10: in this embodiment, referring to fig. 12, the friction sleeve 3 is fixed outside the motor rear end cap 2 through the support 22 on the motor rear end cap 2, the support 22 is provided with a cavity in which the friction sleeve is embedded, the friction sleeve is in sliding fit with the inner wall of the cavity, the end of the motor shaft extends to the outside of the motor rear end cap to the friction sleeve 3 and keeps in contact with the friction sleeve 3, the support 22 is provided with a spring 4, one end of the spring 4 is connected to the friction sleeve, the other end of the spring is connected to the motor rear end cap, the spring 4 is in an elongated stressed state, the elastic force of the spring enables the friction sleeve to be tightly pressed on the end face of the motor shaft, the cavity enables the friction sleeve to be convenient to set, the friction sleeve keeps a certain floatability, excessive wear is avoided, the friction sleeve cannot rotate in the cavity, and the friction sleeve can be of a rectangular structure.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiment in the technical spirit of the present invention are within the scope of the present invention.
Claims (10)
1. The utility model provides a motor shaft reduction gears, including the motor shaft, the motor rear end cap, a serial communication port, motor shaft tip department be equipped with motor shaft end face contact's friction cover, the friction cover is connected on the motor rear end cap, the terminal surface that the friction cover is close to the motor rear end cap is equipped with to the convex style of calligraphy location arch of motor rear end cap, the motor rear end cap corresponds the department and is equipped with the protruding constant head tank that just coincide with the protruding structure in cooperation location, the protruding card in location goes into the constant head tank, realize the location of motor rear end cap to the friction cover, and avoid the friction cover to rotate, motor shaft end face contact produces frictional force in fixed friction cover and the rotation, be equipped with between motor rear end cap and friction cover and make the friction cover attached elastic component on the motor shaft end face.
2. The motor shaft decelerating mechanism as claimed in claim 1, wherein a sleeve portion extending toward an outer circumferential surface of the motor shaft and sleeved on an outer circumferential surface of an end portion of the motor shaft is provided at a side of the friction sleeve adjacent to the motor shaft, the sleeve portion and the friction sleeve are integrally formed, and the elastic member is a spring sleeved outside the decelerating plate.
3. The motor shaft decelerating mechanism as claimed in claim 2, wherein the outer peripheral surface of the sleeve portion is provided with a conical section, the larger end of the conical section is far away from one side of the motor rear end cover, the smaller end of the conical section has an outer diameter consistent with the outer diameter of the sleeve portion, the axial length of the conical section is not greater than the axial length of the sleeve portion, the inner diameter of the spring is not less than the outer diameter of the sleeve portion and not greater than the maximum outer diameter of the conical section, one end of the spring abuts against the corresponding position of the inner wall of the motor rear end cover, and the other end of the spring extends to the sleeve portion and abuts against the outer peripheral surface of the conical section of the sleeve portion.
4. The motor shaft decelerating mechanism as claimed in claim 3, wherein the tapered section is disposed on a side of the sleeved portion away from the rear end cover of the motor, an outer diameter of the tapered section is at a maximum level with an end portion of the sleeved portion away from the rear end cover of the motor, and a boss extending radially outward along the motor shaft is disposed on the end portion of the sleeved portion away from the rear end cover of the motor.
5. The motor shaft decelerating mechanism as claimed in any one of claims 2 to 4, wherein a plurality of oil reservoirs are formed at the sleeving part along the axial direction of the motor shaft, and the plurality of oil reservoirs are uniformly distributed along the circumferential direction of the sleeving part.
6. The motor shaft decelerating mechanism as claimed in claim 2, wherein the outer circumferential surface of the friction sleeve is a tapered surface, the smaller end of the friction sleeve faces one side of the rear end cover of the motor, the inner diameter of the spring is not less than the outer diameter of the minimum position of the friction sleeve and not more than the outer diameter of the maximum position of the friction sleeve, one end of the spring abuts against the inner wall of the rear end cover of the motor, and the other end of the spring abuts against a certain position of the outer circumferential surface of the friction sleeve.
7. The motor shaft retarding mechanism of claim 1, wherein the resilient member is a disk-shaped or arcuate spring disposed between the friction sleeve and the rear end cap of the motor.
8. The motor shaft decelerating mechanism as claimed in claim 1, wherein a pushing mechanism for controlling the friction sleeve to move away from/close to the end of the motor shaft along the axial direction is disposed on the rear end cover of the motor, and a plurality of friction lines for increasing the friction force are disposed on the friction sleeve.
9. The motor shaft retarding mechanism of claim 1, wherein the friction sleeve is tapered at a face where the friction sleeve abuts the end face of the motor shaft, the friction sleeve and the end face of the motor shaft being configured to fit together.
10. The motor shaft retarding mechanism of claim 1, wherein the friction sleeve is disposed outside the motor rear end cap, a bracket for supporting the friction sleeve is disposed outside the motor rear end cap, and the elastic member is a spring disposed between the friction sleeve and an outer wall of the motor housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810986902.5A CN109067082B (en) | 2018-08-28 | 2018-08-28 | Motor shaft reduction gears |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810986902.5A CN109067082B (en) | 2018-08-28 | 2018-08-28 | Motor shaft reduction gears |
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| Publication Number | Publication Date |
|---|---|
| CN109067082A CN109067082A (en) | 2018-12-21 |
| CN109067082B true CN109067082B (en) | 2022-06-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810986902.5A Active CN109067082B (en) | 2018-08-28 | 2018-08-28 | Motor shaft reduction gears |
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| CN112234879B (en) * | 2020-10-28 | 2022-04-15 | 浙江佳乐科仪股份有限公司 | Emergency stop device of permanent magnet synchronous motor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103982563A (en) * | 2014-05-30 | 2014-08-13 | 武汉新威奇科技有限公司 | Friction coupling for electric screw press |
| CN105207404A (en) * | 2015-10-16 | 2015-12-30 | 常州市凯迪电器有限公司 | Electric push rod |
| CN208691084U (en) * | 2018-08-28 | 2019-04-02 | 常州登丰电气有限公司 | A kind of motor shaft deceleration mechanism |
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| TWI448066B (en) * | 2011-05-31 | 2014-08-01 | Timotion Technology Co Ltd | Motor with braking deceleration mechanism for actuating apparatus |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103982563A (en) * | 2014-05-30 | 2014-08-13 | 武汉新威奇科技有限公司 | Friction coupling for electric screw press |
| CN105207404A (en) * | 2015-10-16 | 2015-12-30 | 常州市凯迪电器有限公司 | Electric push rod |
| CN208691084U (en) * | 2018-08-28 | 2019-04-02 | 常州登丰电气有限公司 | A kind of motor shaft deceleration mechanism |
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