Synchronous pulling device of motor

By designing a synchronous pull-off device, the double-sided axial lift synchronization of the motor is achieved by using the connecting rod mechanism and one-way bearing, the problem of direct pull-out and positioning bias in motor repair is solved, and the pull-out accuracy and operation convenience are improved.

CN222644449UActive Publication Date: 2025-03-21THE NO 5311 FACTORY OF THE CHINESE PEOPLES LIBERATION ARMY
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Patent Information

Application Number
CN202323483538.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2023-12-20
Publication Date
2025-03-21
Estimated Expiration
2033-12-20

AI Technical Summary

Technical Problem

In precision transmission occasions, the small matching gap of the motor makes it impossible to pull out directly during repairs, and the alternating pulling method is cumbersome, which can easily lead to positioning bias and affect the repeat positioning accuracy.

Method used

A synchronous starting device is designed to synchronize the axial lift of both sides through the connecting rod mechanism and the one-way bearing, ensuring that the motor is pulled in parallel, and adapting to different threaded hole distances through the adjustment seat and the double-head screw.

Benefits of technology

It realizes synchronous starting and pulling of the motor, avoids single-side misalignment and improves repeated positioning accuracy, is more convenient to operate and more adaptable.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a synchronous pulling device of a motor. The synchronous pulling device specifically comprises a side gear, a transition gear, a driving gear, a handle, a long connecting rod, a short connecting rod and a pulling screw rod, the long connecting rods and the short connecting rods are connected to form two synchronous quadrilateral connecting rod mechanisms which are communicated in the middle, the two long connecting rods are rotationally connected in the middle and coaxially and rotationally provided with the driving gear, and the handle is installed at the end of the driving gear in the direction perpendicular to the axis. Two ends of the two long connecting rods are rotationally connected with the end parts of the short connecting rods; the other ends of the short connecting rods are rotationally connected with each other, and meanwhile, a side gear is rotationally mounted at the coaxial position and rotationally connected with a pulling screw; the driving gear is meshed with the transition gear, and the transition gear is meshed with the side gear. Compared with the prior art, the synchronous axial lifting force can be formed on the two sides of the motor, the influence of single-side stress on the repeated positioning accuracy of the motor is prevented, the synchronous axial lifting device can be suitable for different pulling center distances, and meanwhile, the compatibility is better due to the arrangement of the one-way bearing.
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Description

Technical Field

[0001] The utility model relates to the technical field of motor disassembly, in particular to a synchronous pulling-out device for a motor. Background Art

[0002] In some precision transmission applications, the drive motor is assembled with very small clearances to ensure high-precision transmission. This often prevents the motor from being directly removed during repair. Therefore, a set of symmetrical threaded holes is often provided on the motor flange. By installing screws and then operating the screws, the motor can be removed from the mounting holes using the axial lift of the threads.

[0003] The threaded holes used for motor extraction are usually set on the flange of its outer ring and are symmetrically distributed relative to the center of the motor. If the alternating extraction method is used, it is necessary to continuously operate on both sides. Not only is the operation very cumbersome, but if you are not careful, the positioning outer circle of the motor and the mounting hole will be offset and misaligned, which will have a great impact on the repeatability accuracy. Utility Model Content

[0004] In response to the above problems, the utility model provides a synchronous pulling device for a motor, which can form a synchronous axial lift on both sides of the motor to prevent the influence of unilateral force on the repeated positioning accuracy of the motor; the device uses a connecting rod mechanism to enable the device to have an adjustable pulling center distance; the device uses a one-way bearing to not only make the pulling operation more convenient, but also enable the device to adapt to different threads, so that the device has better compatibility.

[0005] The technical solution for achieving the purpose of the utility model is: a synchronous pulling device of a motor, which is a symmetrical structure and specifically includes side gears, a transition gear, a driving gear, a handle, a long connecting rod, a short connecting rod, a pulling screw, and a one-way bearing; the long connecting rod and the short connecting rod are connected to form a "two synchronous quadrilaterals" connecting rod mechanism connected in the middle, the two long connecting rods are rotatably connected in the middle, and the driving gear is installed coaxially, and the end of the driving gear is installed with a handle perpendicular to the axis direction; the two ends of the two long connecting rods are respectively rotatably connected to the end of the short connecting rod, and two of the same connections are coaxially rotatably installed with transition gears and the two transition gears are not in the same parallelogram; the other ends of the short connecting rods are rotatably connected to each other, and the side gears are rotatably installed at the coaxial position, and the side gears are rotatably connected to the pulling screw through the one-way bearing; the driving gear is meshed with the transition gear, and the transition gear is meshed with the side gear.

[0006] Furthermore, the connecting rod mechanism is axially provided with two groups;

[0007] Furthermore, the synchronous pulling device also includes an adjusting seat and a double-headed screw. There are two adjusting seats, which are symmetrically arranged and rotatably installed at the connection between the two ends of the long connecting rod and the end of the short connecting rod. The installation positions of the two adjusting seats are no longer on the nodes of the same parallelogram nor are they coaxial with the transition gear; the two adjusting seats are installed with double-headed screws, and the distance between the axes of the two adjusting seats is adjusted by the double-headed screws.

[0008] Furthermore, the two adjustment seats are respectively provided with a left threaded hole and a right threaded hole; both ends of the double-headed screw are threaded, one end is a left thread and the other end is a right thread.

[0009] Furthermore, the side gear 1 has stepped shafts on both sides of the gear, and the stepped shafts are rotatably connected to the connecting rod mechanism. The side gear is a hollow structure, the middle stepped hole is used to fix the one-way bearing, and the threaded holes at both ends are used to install the limit sleeve.

[0010] Furthermore, the limiting sleeve is fixedly installed in the threaded hole of the side gear and is used to axially limit the long connecting rod and the short connecting rod.

[0011] Furthermore, the specific installation relationship between the long connecting rod, the short connecting rod and the transition gear is: the long connecting rod, the short connecting rod and the transition gear are sleeved on the connecting shaft and are rotatably connected to each other; the retaining rings are fixed to the two ends of the connecting shaft with screws at both ends for axial limitation.

[0012] Furthermore, the one-way bearing satisfies the requirement that when the extraction screw is rotated in one direction, the one-way bearing should be in a disengaged state, and when it is rotated in the opposite direction, the one-way bearing should be in an engaged state.

[0013] Furthermore, the adjustment seat is T-shaped, the end of the middle boss is semicircular, and a threaded hole is processed in the center of the arc. Two adjustment seats form a group, one of which is left-threaded and the other is right-threaded. Both ends of the double-headed screw are threaded, one end is left-threaded and the other end is right-threaded.

[0014] Furthermore, a thread is processed on the front end of the extraction screw rod, and the thread matches the extraction thread hole of the motor.

[0015] Compared with the prior art, the present invention has the following significant advantages:

[0016] 1. Through the interaction of the gear sets, the device can achieve synchronous rotation of the studs on both sides for generating axial thrust, ensuring that the motor is pulled out of the mounting seat in parallel without causing unilateral misalignment force.

[0017] 2. By rotating and adjusting the double-headed screw at the bottom, the connecting rod mechanism can be driven to adjust the center distance of the side gears, which can adapt to the use of the device under different hole spacing conditions.

[0018] 3. The center of the side gear adopts a one-way bearing structure, which not only allows the selection of different sizes of extraction thread shafts according to needs to meet the use of different specifications of threads, but also the extraction thread shaft can be replaced by directly inserting or pulling out, which is very convenient to use.

[0019] 4. When the two side extraction threaded shafts are screwed into the threads on the motor flange in a clockwise direction, the side gears will not be caused to rotate, thus avoiding the mutual interference between the gears when the extraction threaded shafts are screwed into the threads on the motor flange. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the front structure of a motor synchronous pulling device.

[0021] Figure 2 The present invention is a schematic diagram of the top view of the structure of a motor synchronous pulling device.

[0022] Figure 3 The present invention is a schematic diagram of the connecting rod structure of a synchronous pulling device of a motor.

[0023] Figure 4 The present invention is a schematic diagram of the cross-sectional structure of the side gear position of the motor synchronous pulling device.

[0024] Figure 5 The present invention is a schematic diagram of the cross-sectional structure of the transition gear position of the motor synchronous pulling device.

[0025] Figure 6 The present invention is a schematic diagram of the cross-sectional structure of the driving gear position of a motor synchronous pulling device.

[0026] Figure 7 This is a schematic diagram of the cross-sectional structure of the position adjustment seat of the motor synchronous pulling device.

[0027] Figure 8 The present invention is a schematic diagram of the cross-sectional structure of the side gear of a motor synchronous pulling device.

[0028] 1- side gear, 2- transition gear, 3- driving gear, 4- handle, 5- long connecting rod, 6- short connecting rod, 7- limiting sleeve, 8- pulling screw, 9- retaining ring, 10- screw, 11- adjusting seat, 12- double-headed screw, 13- connecting shaft, 14- one-way bearing. DETAILED DESCRIPTION

[0029] 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 creative work are within the scope of protection of the present invention.

[0030] like Figure 1-8 As shown, a synchronous pulling device of a motor includes: a side gear 1, a transition gear 2, a driving gear 3, a handle 4, a long connecting rod 5, a short connecting rod 6, a limiting sleeve 7, a pulling screw 8, a retaining ring 9, a screw 10, an adjustment seat 11, a double-headed screw 12, a connecting shaft 13, and a one-way bearing 14.

[0031] The two ends of the long connecting rod 5 are semicircular structures, with a mounting hole processed at the symmetrical center and connecting holes processed at both ends.

[0032] The two ends of the short connecting rod 6 are semicircular structures, and connecting holes are processed at both ends.

[0033] The long connecting rod 5 and the short connecting rod 6 are connected to form a "two synchronous quadrilaterals" connecting rod mechanism connected in the middle. Specifically, the two long connecting rods 5 are rotatably connected in the middle, and the driving gear 3 is coaxially installed. The end of the driving gear 3 is installed with a handle 4 in the vertical axis direction; the two ends of the two long connecting rods 5 are respectively rotatably connected to the end of the short connecting rod 6, and two of the same connections are coaxially rotatably installed with transition gears 2, and the two transition gears 2 are not in the same parallelogram 2; the other ends of the short connecting rods 6 are rotatably connected to each other, and the side gears 1 are coaxially installed, and the side gears 1 are rotatably connected to the pulling screw 8 through a one-way bearing 14;.

[0034] The connecting rod mechanism is a symmetrical structure, and two groups are provided in the thickness direction of the connecting rod mechanism;

[0035] The side gear 1 has stepped shafts on both sides of the gear, and the stepped shafts are rotated to connect the connecting rod mechanism. The side gear 1 is a hollow structure, and the stepped hole in the middle is used to fix the one-way bearing 14, and the threaded holes at both ends are used to install the limit sleeve 7.

[0036] The adjustment seats 11 are installed between two groups of connecting rod mechanisms. Specifically, there are two adjustment seats 11, which are symmetrically arranged and rotated to install the connections between the two ends of the long connecting rod 5 and the ends of the short connecting rod 6. The installation positions of the two adjustment seats are no longer on the nodes of the same parallelogram, nor are they coaxial with the transition gear 2.

[0037] Specifically, such as Figure 3 As shown, the side gear 1 is installed at positions C and E of the connecting rod mechanism. The transition gear 2 is installed at positions A and B of the connecting rod mechanism using a connecting shaft 13. Retaining rings 9 are fixed to both ends of the connecting shaft 13 using screws 10. The driving gear 3 is installed at position D of the connecting rod mechanism. The adjustment seat 11 is installed at positions F and G of the connecting rod mechanism, and retaining rings 9 are fixed to both ends of the adjustment seat 11 using screws 10.

[0038] The adjustment seat 11 is T-shaped, with cylindrical upper and lower ends. The connecting rod mechanism is installed on the outer circle of the cylinder. The end face of the cylinder is processed with a threaded hole. The end of the middle boss is semicircular, and a threaded hole is processed in the center of the arc. Two adjustment seats 11 are grouped together, one of which is left-threaded and the other is right-threaded.

[0039] The middle part of the double-headed screw 12 is hexagonal, with threads at both ends, one end is left-threaded and the other end is right-threaded, which are respectively installed and connected with the left and right threads of the adjustment seat 11, thereby adjusting the distance between the two adjustment seats 11, and then adjusting the distance between the two extraction screws 8, so that the synchronous extraction device of the motor of the utility model is suitable for motor mounting studs with different spacings.

[0040] The driving gear 3 is meshed with the transition gear 2. The transition gear 2 is meshed with the side gear 1. The number of teeth of the transition gears on both sides is the same, and the number of teeth of the side gears on both sides is the same.

[0041] The handle 4 is installed at the end of the driving gear 3, and the end surface is fixed with screws to drive the driving gear 3 to rotate.

[0042] The front end of the extraction screw 8 is processed with a thread, and the thread cooperates with the extraction thread hole of the motor; the middle of the extraction screw 8 is a cylindrical surface, and the diameter of the cylinder is equal to the inner hole of the one-way bearing 14; the rear end step is knurled to facilitate the screwing operation of the front end thread, and the extraction screw 8 is installed in the one-way bearing of the side gear 1.

[0043] Furthermore, the pulling screw 8 is installed in the one-way bearing of the side gear 1 from the front. When the pulling screw 8 rotates clockwise, the one-way bearing 14 should be in a disengaged state, and when it rotates counterclockwise, the one-way bearing 14 should be in an engaged state.

[0044] The utility model discloses a synchronous pulling device for a motor, and its specific working process is as follows:

[0045] The middle part of the double-headed screw 12 is adjusted to be hexagonal so that the center distance of the side gears 1 on both sides is consistent with the center distance of the extraction threaded holes on the outer ring flange of the motor.

[0046] Install the extraction screw rod 8 in the center hole of the side gear 1 respectively, and screw the thread at the front end of the extraction screw rod 8 into the extraction thread hole clockwise until the end of the extraction screw rod 8 is firmly pressed against the motor mounting seat. When the extraction screw rod 8 is rotated clockwise, the one-way bearing 14 is disengaged and will not drive the side gear 1 to rotate.

[0047] When the handle 4 is rotated clockwise, the driving gear 3 will drive the two transition gears 2 to rotate counterclockwise, and the counterclockwise rotating transition gear 2 will drive the side gear 1 to rotate clockwise. The side gear 1 rotates clockwise, and the one-way bearing at the center will engage with the extraction screw 8, causing the extraction screws 8 on both sides to rotate clockwise at the same time (when the extraction screw 8 is stationary and the side gear 1 rotates clockwise, it is equivalent to the side gear 1 being stationary and the extraction screw 8 rotating counterclockwise, so at this time the one-way bearing 14 is engaged with the extraction screw 8).

[0048] When the ends of the extraction screw rods 8 are pressed against the motor mounting seat, the extraction screw rods 8 rotating clockwise on both sides simultaneously will pull the motor out of the mounting seat in parallel.

Claims

1. A synchronous pulling device for a motor, characterized in that: The synchronous extraction device is a symmetrical structure, specifically comprising a side gear, a transition gear, a driving gear, a handle, a long connecting rod, a short connecting rod, and an extraction screw; The long connecting rod and the short connecting rod are connected to form a "two synchronous quadrilateral" connecting rod mechanism connected in the middle. The two long connecting rods are connected in rotation in the middle, and the driving gear is installed to rotate coaxially at the same time. The end of the driving gear is installed with a handle in the vertical axis direction; The two ends of the two long connecting rods are respectively rotatably connected to the ends of the short connecting rods, and two of the same connecting points are coaxially rotatably installed with transition gears, and the two transition gears are not in the same parallelogram; The other ends of the short connecting rods are rotatably connected to each other, and at the same time, the side gears are rotatably installed at the coaxial position, and the side gears are rotatably connected to the extraction screw rod; The driving gear is meshed with the transition gear, and the transition gear is meshed with the side gear.

2. The synchronous pulling device of the motor according to claim 1, characterized in that: The connecting rod mechanism is axially provided with two groups, and the side gears and the pulling screw are rotationally connected through a one-way bearing.

3. The synchronous pulling device of the motor according to claim 2, characterized in that: The synchronous pulling device also includes an adjusting seat and a double-headed screw. There are two adjusting seats, which are symmetrically arranged and rotatably installed at the connection between the two ends of the long connecting rod and the end of the short connecting rod. The installation positions of the two adjusting seats are no longer at the nodes of the same parallelogram and are not coaxial with the transition gear. The double-headed screws are installed on the two adjusting seats, and the distance between the axes of the two adjusting seats is adjusted by the double-headed screws.

4. The synchronous pulling device of the motor according to claim 3, characterized in that: The two adjustment seats are respectively provided with a left threaded hole and a right threaded hole; both ends of the double-headed screw are threaded, one end is a left thread and the other end is a right thread.

5. The synchronous pulling device of the motor according to claim 1, characterized in that: The side gear (1) has stepped shafts on both sides of the gear, and the stepped shafts are rotatably connected to the connecting rod mechanism. The side gear is a hollow structure, and the stepped hole in the middle is used to fix and install the one-way bearing, and the threaded holes at both ends are used to install the limit sleeve.

6. The synchronous pulling device of the motor according to claim 5, characterized in that: The limiting sleeve is fixedly installed in the threaded hole of the side gear and is used for axially limiting the long connecting rod and the short connecting rod.

7. The synchronous pulling device of the motor according to claim 1, characterized in that: The specific installation relationship between the long connecting rod, the short connecting rod and the transition gear is: the long connecting rod, the short connecting rod and the transition gear are sleeved on the connecting shaft and are rotatably connected to each other; the retaining rings are fixed to the two ends of the connecting shaft with screws respectively for axial limitation.

8. The synchronous pulling device of the motor according to claim 4, characterized in that: The one-way bearing satisfies the requirement that when the extraction screw is rotated in one direction, the one-way bearing should be in a disengaged state, and when it is rotated in the reverse direction, the one-way bearing should be in an engaged state.

9. The synchronous pulling device of the motor according to claim 3, characterized in that: The adjustment seat is T-shaped, the end of the middle boss is semicircular, and a threaded hole is processed in the center of the arc. Two adjustment seats form a group, one of which is left-threaded and the other is right-threaded. Both ends of the double-headed screw are threaded, one end is left-threaded and the other end is right-threaded.

10. The synchronous pulling device of the motor according to claim 1, characterized in that: The front end of the extraction screw rod is processed with threads, and the threads match the extraction thread hole of the motor.