Medical auxiliary brake motor

Abstract

The present invention discloses a motor for medical auxiliary braking, comprising a main shaft, a rotor, a stator, an outer shell and a cover, and is characterized in that: an electromagnetic assembly is fixed on the main shaft, the stator is sleeved and fixed on the outer surface of the electromagnetic assembly, the rotor is located on the outside of the stator and fixed on the inner wall of the cover, the outer shell and the cover are fixedly connected and are both connected to the main shaft through bearings, the electromagnetic assembly comprises a magnet shell and an end cover fixedly mounted on the upper end of the magnet shell, an annular groove is provided inside the magnet shell, and an excitation coil is installed inside the annular groove. The present invention solves the problem that the brake motor occupies a large space and is inconvenient to layout in the vehicle body. The space occupied by the motor is reduced by arranging the friction plate and the brake disc above the magnet shell and on the inner side of the stator, and the excitation coil is arranged inside the magnet shell, which further reduces the size of the motor.

Description

Technical Field

[0001] The present invention relates to the technical field of brake motors, in particular to a motor for medical auxiliary braking. Background Art

[0002] Brake motors are widely used in various mechanical equipment and transmissions that require rapid stopping and precise positioning. Braking motors utilize an armature to press against a brake disc, instantly stopping the motor under the action of frictional torque. In the medical field, brake motors are commonly used in wheelchairs to brake and stop the vehicle.

[0003] Existing brake motors usually install the brake components on the outside of the motor or on one side of the housing or rotor, which makes the motor occupy a large space and is not conducive to the layout of the motor in the vehicle body. Summary of the Invention

[0004] The purpose of the present invention is to provide a motor for medical auxiliary braking, so as to solve the problem in the prior art that the brake motor occupies a large space and is inconvenient to be arranged in the vehicle body.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a motor for medical auxiliary braking, comprising a main shaft, a rotor, a stator, a shell and a cover, characterized in that: an electromagnetic assembly is fixed on the main shaft, the stator is sleeved and fixed on the outer surface of the electromagnetic assembly, the rotor is located on the outside of the stator and fixed on the inner wall of the cover, the shell and the cover are fixedly connected and are both connected to the main shaft through bearings, the electromagnetic assembly comprises a magnet shell, and an end cover fixedly mounted on the upper end of the magnet shell, an annular groove is opened inside the magnet shell, an excitation coil is installed in the annular groove, a friction plate is fixed on the end face of the annular groove close to the shell side, a brake disc is provided on the end face of the friction plate close to the shell side, the brake disc is located on the side of the end cover close to the cover and the brake disc can slide axially between the end cover and the friction plate, the brake disc is sleeved on the shell and cannot rotate relative to the shell.

[0006] According to the above technical solution, a manual brake assembly is provided on the end face of the electromagnetic assembly close to the cover side, and the manual brake assembly includes a drive assembly and a handle connected to the drive assembly, the handle is sleeved on the main shaft, and the drive assembly is installed on the end face of the magnet shell close to the cover side and sleeved on the main shaft. The drive assembly is connected to the friction plate and the rotation of the handle can drive the friction plate to undergo axial displacement and contact and separation with the brake disc.

[0007] According to the above technical solution, the driving assembly includes a rotating disk, a pad and a shift fork. A shoulder is formed on the main shaft, and a long waist hole is provided on the surface of the shoulder. The shift fork is connected to the handle through the long waist hole. The shift fork is sleeved on the main shaft and can rotate under the drive of the handle. The pad and the rotating disk are arranged in sequence from the inside to the outside inside the shift fork. The rotating disk and the shift fork are connected together. A through waist hole is provided on the surface of the rotating disk. The pad is connected to the friction plate in the magnet housing by a screw, and the screw passes through the waist hole of the rotating disk and can slide in the magnet housing. An adjustment component for adjusting the gap between the rotating disk and the surface of the magnet housing is provided.

[0008] According to the above technical solution, the adjustment component includes two groups of ball holes of different sizes opened on the surface of the rotating disk, and the magnet shell is provided with a ball socket near the side end surface of the cover shell. The steel ball is installed in the ball socket and is against the surface of the rotating disk. When the rotating disk rotates, the screw is located at one end of the waist hole, and the steel ball is located in the small ball hole. When the screw is located at the other end of the waist hole, the steel ball is located in the large ball hole. The number of the steel balls corresponds to the number of the ball holes.

[0009] According to the above technical solution, the adjustment component includes circularly arranged arc-shaped right-angled triangular adjustment protrusions arranged on the surface of the rotating disk, and the surface of the magnet shell is provided with right-angled triangular adjustment grooves corresponding to the adjustment protrusions, and the inclined surface of the adjustment protrusion matches the inclined surface of the adjustment groove.

[0010] According to the above technical solution, a mounting pin is formed on the side of the shift fork close to the cover, a through hole is opened on the surface of the handle, and the mounting pin of the shift fork passes through the long waist hole on the shaft shoulder and is matched with the through hole of the handle.

[0011] According to the above technical solution, a groove is provided on the outer side of the rotating disk, and a locking column is formed on the side of the shift fork close to the shell, and the locking column is engaged with the groove.

[0012] According to the above technical solution, a polygonal sleeve is formed by extending from the inner side of the shell, and a polygonal hole matching with the sleeve is provided at the center of the brake disc.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] (1) By placing the friction plate and brake disc above the magnet housing and on the inner side of the stator, the space occupied is small, and the size of the motor is reduced. The magnet housing containing the excitation coil is installed on the inner side of the stator, which further reduces the size of the motor and makes the layout of the motor more flexible. The excitation coil in the magnet housing is energized to generate magnetism, which attracts the brake disc to contact the friction plate, causing friction between the two, braking the motor and stopping the rotation. When the power is cut off, the excitation coil no longer generates magnetism and no longer generates suction on the brake disc. At this time, the motor rotates, and the brake disc and the friction plate gradually loosen and separate.

[0015] (2) By setting up a manual brake assembly, a gap adjustment component is set between the magnet housing and the rotating disk. When the wheelchair is pushed manually, the rotating disk is rotated by turning the handle to adjust the gap between the rotating disk and the magnet housing, so that the screw moves axially in the magnet housing, causing the friction plate to move axially, controlling the contact and separation of the friction plate and the brake disk, and locking the position of the friction plate, thereby braking the rotor of the motor and realizing manual locking of the wheelchair. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is a schematic cross-sectional view of the internal structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the overall appearance of the present invention;

[0019] Figure 3 It is a schematic diagram of the shift fork installation structure of the present invention;

[0020] Figure 4 It is a schematic diagram of the connection structure of the backing plate, the rotating disk and the friction plate of the present invention;

[0021] Figure 5 is a schematic diagram of a rotating disk of the present invention;

[0022] Figure 6 is a structural schematic diagram of a rotating disk and a magnet housing according to a second embodiment of the present invention;

[0023] Figure 7 This invention Figure 6 Schematic diagram of the cross-sectional structure in the AA direction;

[0024] In the figure: 1. End cover; 2. Brake disc; 3. Friction plate; 4. Magnet housing; 41. Ball socket; 5. Steel ball; 6. Rotating plate; 61. Waist hole; 62. Ball hole; 621. Large ball hole; 622. Small ball hole; 63. Adjustment protrusion; 64. Adjustment groove; 7. Pad; 8. Shift fork; 81. Engaging column; 82. Mounting pin; 9. Bearing; 11. Excitation coil; 12. Stator; 13. Rotor; 14. Spindle; 141. Shaft shoulder; 142. Long waist hole; 151. Housing; 152. Cover; 16. Handle. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Example 1

[0027] See also Figures 1 to 2 The present invention provides a technical solution: a medical auxiliary braking motor, comprising a main shaft 14, a rotor 13, a stator 12, a shell 151 and a cover 152, characterized in that: an electromagnetic assembly is fixed on the main shaft 14, the stator 12 is sleeved and fixed on the outer surface of the electromagnetic assembly, the rotor 13 is located on the outside of the stator 12 and fixed on the inner wall of the cover 152, the shell 151 and the cover 152 are fixedly connected and are both connected to the main shaft 14 through bearings, the electromagnetic assembly comprises a magnet housing 4, and an end cover 1 fixedly mounted on the upper end of the magnet housing 4, an annular groove is opened inside the magnet housing 4, an excitation coil 11 is installed in the annular groove, a friction plate 3 is fixed on the end surface of the annular groove close to the shell 151, and the friction plate A brake disc 2 is provided on the end surface near the housing 151. The brake disc 2 is located on the side of the end cover 1 near the casing 152 and can slide axially between the end cover 1 and the friction plate 3. The brake disc 2 is sleeved on the housing 151 and cannot rotate relative to the housing 151. By installing the electromagnetic assembly inside the stator 12, the brake disc 2 and the friction plate 3 are installed on the upper end of the magnet housing 4 and the lower side of the end cover 1, which reduces the occupied space. At the same time, the excitation coil 11 is provided inside the magnet housing 4, which further saves space and enables flexible layout of the motor. The excitation coil 11 is energized to generate magnetism to attract the brake disc 2, causing the brake disc 2 to contact the friction plate 3, thereby generating friction for braking.

[0028] like Figure 1As shown, a manual brake assembly is provided on the end face of the electromagnetic assembly close to the cover 152. The manual brake assembly includes a drive assembly and a handle 16 fixedly connected to the drive assembly. The handle 16 is sleeved on the main shaft 14. The drive assembly is installed on the end face of the magnet housing 4 close to the cover 152 and is sleeved on the main shaft 14. The drive assembly is connected to the friction plate 3 and the rotation of the handle 16 can drive the friction plate 3 to axially displace and contact and separate from the brake disc 2. When the wheelchair is in the hand-push mode, rotating the handle 16 can drive the friction plate 3 to axially move, so that the friction plate 3 moves along the axial direction toward the shell side and fits the brake disc 2, generating friction force to brake the rotor 13.

[0029] like Figures 3 to 5 As shown, the drive assembly includes a rotating disk 6, a pad 7 and a shift fork 8. A shoulder 141 is formed on the main shaft 14, and a through long waist hole 142 is opened on the surface of the shoulder 141. The shift fork 8 passes through the long waist hole 142 and is connected to the handle 16. The shift fork 8 is sleeved on the main shaft 14 and can rotate under the drive of the handle 16. The pad 7 and the rotating disk 6 are sequentially arranged inside the shift fork 8 from the inside to the outside. The rotating disk 6 and the shift fork 8 are connected together. A through waist hole is opened on the surface of the rotating disk 6. The pad 7 is screwed to the friction plate 3 in the magnet housing 4. The rotating disk 6 and the magnet housing 4 are connected, and the screw passes through the waist hole 61 of the rotating disk 6 and can slide in the magnet housing 4. An adjustment component for adjusting the gap between the rotating disk 6 and the surface of the magnet housing 4 is provided. The rotating handle 16 drives the shift fork 8 to rotate, and further drives the rotating disk 6 to rotate. Because the screw of the backing plate 7 passes through the waist hole 61 of the rotating disk 6, the magnet housing 4 does not rotate with the rotating disk 6, and the rotation of the handle 16 will drive the screw of the backing plate 7 to axially displace, so that the friction plate 3 on the screw contacts the brake disc 2, generating friction force for braking.

[0030] The adjustment component includes two sets of ball holes 62 of different sizes opened on the surface of the rotating disk 6. The magnet housing 4 is provided with a ball socket 41 near the side end surface of the cover 152. The steel ball 5 is installed in the ball socket 41 and abuts against the surface of the rotating disk 6. When the rotating disk 6 rotates, the screw is located at one end of the waist hole 61, and the steel ball 5 is located in the small ball hole 622. When the screw is located at the other end of the waist hole 61, the steel ball 5 is located in the large ball hole 621. The number of steel balls 5 corresponds to the number of ball holes. The rotation of the rotating disk 6 causes the position of the steel ball 5 to shift, so that the steel ball 5 is transferred between the small ball hole 622 and the ball socket 41 and the large ball hole 621 and the ball socket 42. 1, so that the distance between the rotating disk 6 and the magnet housing 4 becomes smaller, which is equivalent to the rotating disk 6 making axial movement toward the shell 151 side, so that the friction plate 3 and the brake disc 2 fit together to generate friction, brake the rotor 13, and lock the wheelchair. When locking is not needed, the handle 16 is rotated in the opposite direction to drive the rotating disk 6 to rotate a certain angle, so that the steel ball 5 is transferred from the large ball hole 621 to the small ball hole 622, so that the distance between the rotating disk 6 and the magnet housing 4 becomes larger, which is equivalent to the rotating disk 6 making axial movement toward the cover 152 side, so that the friction plate 3 and the brake disc 2 are separated, no longer generating friction, and the wheelchair is unlocked.

[0031] like Figure 3 As shown, a mounting pin 82 is formed on the side of the shift fork 8 close to the cover 152, and a through hole is opened on the surface of the handle 16. The mounting pin 82 of the shift fork 8 passes through the long waist hole 142 on the shaft shoulder 141 and is connected with the through hole of the handle 16. The mounting pin 82 of the shift fork 8 is inserted into the through hole on the handle 16, so that the shift fork 8 and the handle 16 rotate together, and both are easy to install.

[0032] A groove is provided on the outer side of the rotating disk 6, and a locking column 81 is formed on the side of the shift fork 8 close to the shell 151. The locking column 81 is engaged with the groove. By engaging the locking column 81 of the shift fork 8 with the groove on the outer side of the rotating disk 6, the rotating disk 6 is fixed between the magnet housing 4 and the shift fork 8 and rotates with the shift fork 8.

[0033] A polygonal sleeve is extended from the inner side of the shell 151, and a polygonal hole is provided in the center of the brake disc 2 to match the sleeve. The inner hexagonal sleeve of the shell 151 is engaged with the hexagonal center hole of the brake disc 2, so that the shell 151 and the brake disc 2 can rotate simultaneously.

[0034] Example 2

[0035] like Figure 6 and 7As shown, the other structures of Example 2 are the same as those of Example 1, and the difference lies in that the structure of the adjustment component is different. The adjustment component includes an arc-shaped right-angled triangle-shaped adjustment protrusion 63 arranged in a circular pattern on the surface of the rotating disk 6, and a right-angled triangle-shaped adjustment groove 64 corresponding to the adjustment protrusion 63 is provided on the surface of the magnet housing 4. The inclined surface of the adjustment protrusion 63 matches the inclined surface of the adjustment groove 64. When the rotating disk 6 rotates, the screw is located at one end of the waist hole 61, the adjustment protrusion 63 is engaged with the adjustment groove 64, and the adjustment groove 64 limits the adjustment protrusion 63. At this time, the rotating disk 6 is in contact with the magnet housing 4, the friction plate 3 is separated from the brake disc 2, and the wheelchair is in an unlocked state. When the screw is located at the other end of the waist hole 61, the adjustment protrusion 63 is located on the surface of the magnet housing 4. At this time, the rotating disk 6 is separated from the magnet housing 4, the friction plate 3 is in contact with the brake disc 2 for braking, and the wheelchair is in a locked state.

[0036] Working principle: When the motor needs to brake during normal rotation, the excitation coil in the magnet housing will be energized, causing the excitation coil to generate magnetism, generating suction to the brake disc on the upper side of the magnet housing, attracting the brake disc to fit with the friction plate, thereby generating friction between the two and braking the motor. When braking is no longer needed, the excitation coil is stopped from being energized. At this time, the excitation coil no longer generates suction to the brake disc, causing the brake disc and friction plate to no longer fit together. At this time, the motor rotates, and the brake disc and friction plate will separate under the action of rotation.

[0037] When in manual mode, rotating the handle will drive the shift fork to rotate, thereby rotating the rotating disk, while the main shaft is fixed. At this time, the rotating disk and the magnet housing will rotate relative to each other, causing the steel ball to shift, and the steel ball will move from the ball socket and the small ball hole to the ball socket and the large ball hole. In this way, the distance between the rotating disk and the lower end surface of the magnet housing becomes smaller. The magnet housing is fixed, and the rotating disk, the pad and the friction plate are connected together by screws, which is equivalent to the rotating disk moving upward, so that the friction plate moves upward and fits tightly with the brake disc to generate friction, brake and lock the wheelchair. When unlocking is required, the handle is reset. At this time, the steel ball moves from the ball socket and the large ball hole to the ball socket and the small ball hole. The distance between the rotating disk and the lower end surface of the magnet housing becomes larger, which is equivalent to the rotating disk moving downward, causing the friction plate to move downward and separate from the brake disc. The two are no longer tightly fitted and no braking is performed.

[0038] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A motor for medical auxiliary braking, comprising a main shaft, a rotor, a stator, a housing and a cover, characterized in that: An electromagnetic assembly is fixed to the main shaft, the stator is sleeved and fixed on the outer surface of the electromagnetic assembly, the rotor is located outside the stator and fixed to the inner wall of the cover, the cover and the cover are fixedly connected and both are connected to the main shaft via bearings, the electromagnetic assembly includes a magnet housing and an end cover fixedly mounted on the upper end of the magnet housing, an annular groove is defined within the magnet housing, an excitation coil is mounted within the annular groove, a friction plate is fixed to the end surface of the annular groove near the housing, a brake disc is provided on the end surface of the friction plate near the housing, the brake disc is located on the side of the end cover near the housing and can slide axially between the end cover and the friction plate, the brake disc is sleeved on the housing and cannot rotate relative to the housing, a manual brake assembly is provided on the end surface of the electromagnetic assembly near the housing, the manual brake assembly includes a drive assembly and a handle connected to the drive assembly, the handle is sleeved on the main shaft, the drive assembly is mounted on the end surface of the magnet housing near the housing and sleeved on the main shaft, the drive assembly is connected to the friction plate, and rotation of the handle can drive the friction plate to axially displace and contact and separate from the brake disc; The driving assembly includes a rotating disk, a pad and a shift fork, a shaft shoulder is formed on the main shaft, a through long waist hole is opened on the surface of the shaft shoulder, the shift fork passes through the long waist hole and is connected to the handle, the shift fork is sleeved on the main shaft and can rotate under the drive of the handle, the pad and the rotating disk are sequentially arranged inside the shift fork from the inside to the outside, the rotating disk and the shift fork are connected together, a through waist hole is opened on the surface of the rotating disk, the pad is connected to the friction plate in the magnet housing by a screw, and the screw passes through the waist hole of the rotating disk and can slide in the magnet housing, and an adjustment component for adjusting the gap between the rotating disk and the surface of the magnet housing is provided; The adjustment component includes two groups of ball holes of different sizes opened on the surface of the rotating disk. The magnet shell is provided with a ball socket near the side end surface of the cover shell. The steel ball is installed in the ball socket and abuts against the surface of the rotating disk. When the rotating disk rotates, the screw is located at one end of the waist hole, and the steel ball is located in the small ball hole. When the screw is located at the other end of the waist hole, the steel ball is located in the large ball hole. The number of the steel balls corresponds to the number of the ball holes.

2. The medical auxiliary braking motor according to claim 1, characterized in that: The adjustment component includes circularly arranged arc-shaped right-angled triangle adjustment protrusions arranged on the surface of the rotating disk, and the surface of the magnet shell is provided with right-angled triangle adjustment grooves corresponding to the adjustment protrusions, and the inclined surface of the adjustment protrusion matches the inclined surface of the adjustment groove.

3. The medical auxiliary braking motor according to claim 1, characterized in that: The side of the shift fork close to the cover shell is formed with a mounting pin, and the surface of the handle is provided with a through hole. The mounting pin of the shift fork passes through the long waist hole on the shaft shoulder and is matched with the through hole of the handle.

4. The medical auxiliary braking motor according to claim 1, characterized in that: A groove is formed on the outer side of the rotating disk, and a clamping column is formed on the side of the shift fork close to the shell, and the clamping column is embedded in the groove.

5. The medical auxiliary braking motor according to claim 1, characterized in that: A polygonal sleeve is formed by extending from the inner side of the shell, and a polygonal hole matching with the sleeve is provided at the center of the brake disc.

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