Stator installation device of brushless motor for electric wheelchair

Abstract

The invention relates to the field of motor assembly, in particular to a stator mounting device of a brushless motor for an electric wheelchair, which comprises a U-shaped frame, guide rods are fixedly connected between two vertical sections of the U-shaped frame in a front-back symmetrical manner, and a shell fixing mechanism is jointly mounted outside the two guide rods in a left-right sliding manner. A transverse moving mechanism for driving the shell fixing mechanism to move left and right is installed on the top of the horizontal section of the U-shaped frame, and a stator fixing mechanism matched with the shell fixing mechanism is installed on the vertical section of the right side of the U-shaped frame. A stator is installed through cooperative use of the shell fixing mechanism, the transverse moving mechanism and the stator fixing mechanism, a positioning rod is matched with an installation hole in the motor shell, the motor shell can be rapidly positioned, and the motor shell and the stator are prevented from being dislocated in the process of screwing an installation bolt; and installation and fixation of the motor shell and the stator by installation bolts are facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of motor assembly, in particular to a stator mounting device of a brushless motor for an electric wheelchair. Background Art

[0002] Brushless motors are usually composed of a stator, a rotor, and an electronic commutator (i.e., a drive circuit). The stator usually contains a set of coils (windings) wound around it, which are connected in a certain pattern to form a magnetic field. The stator installation of a brushless DC motor is an important part of the motor assembly process. Accurate stator installation can ensure uniform air gaps between the rotor and the stator, ensuring smooth operation of the motor, low noise, and high efficiency.

[0003] When installing the stator, the motor housing is generally fixed first, and then the position of the stator is adjusted so that the fixing holes on the stator are aligned with the threaded holes in the motor housing, and then the stator is placed in the motor housing, and finally the stator is fixed to the motor housing with bolts. The above installation method has the following shortcomings: 1. Since the stator is generally a circular center structure, the stator is prone to a certain degree of deflection during the process of placing the stator into the motor housing, resulting in the fixing holes and the threaded holes being unable to be completely aligned. The position of the stator needs to be fine-tuned, which affects the fixation of the stator and the motor housing by the bolts; 2. When installing and fixing the stator, it is necessary to first place the stator into the motor housing, and then put the bolts into the fixing holes, and finally use an additional bolt tightening tool to tighten the bolts one by one, which affects the efficiency of the stator installation. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a stator mounting device for a brushless motor for an electric wheelchair, comprising a C-shaped frame, wherein a guide rod is fixedly connected symmetrically front and back between two vertical sections of the C-shaped frame, a shell fixing mechanism is installed on the outside of the two guide rods for sliding left and right together, a lateral moving mechanism for driving the shell fixing mechanism to move left and right is installed on the top of the horizontal section of the C-shaped frame, and a stator fixing mechanism that cooperates with the shell fixing mechanism is installed on the vertical section on the right side of the C-shaped frame.

[0005] The housing fixing mechanism includes a positioning sleeve that is installed on the outside of two guide rods for sliding left and right together. A hole groove that matches the shape of the motor housing is opened in the middle of the positioning sleeve. The right side of the positioning sleeve is fixedly connected to a plurality of positioning rods that are evenly distributed around the hole groove. External clamping components for clamping the motor housing are installed on the front and rear sides of the positioning sleeve.

[0006] The stator fixing mechanism includes a hollow cylinder fixedly mounted on the right vertical section of the U-shaped frame, a plurality of inner clamping plates are evenly distributed on the outer circumference of the hollow cylinder, a telescopic component for driving the inner clamping plate to clamp the stator internally is mounted on the hollow cylinder, a positioning ring is fixedly connected to the outside of the hollow cylinder through a support rod, a plurality of positioning components are evenly distributed on the outer circumference of the positioning ring, a bolt tightening component is mounted on the right side of the positioning ring, and a limiting component is symmetrically mounted on the outer circular wall of the positioning ring.

[0007] In one possible implementation, the outer clamping assembly includes a rectangular groove frame fixedly mounted on the side of the positioning sleeve, a clamping block is slidably mounted on the side of the rectangular groove frame close to the center of the positioning sleeve, an end of the clamping block close to the center of the positioning sleeve slides through the interior of the hole groove, an inclined surface is provided on the right end of the clamping block, the right end of the inclined surface is inclined toward the end away from the center of the positioning sleeve, and a reset spring is fixedly connected between the side of the clamping block away from the center of the positioning sleeve and the rectangular groove frame.

[0008] In one possible implementation, the lateral movement mechanism includes a first slide groove fixedly installed on the top of the horizontal section of the U-shaped frame, a first lead screw is rotatably installed inside the first slide groove, a first slider is sleeved on the external thread of the first lead screw, the first slider is slidably installed inside the first slide groove, the top of the first slider is fixedly connected to the bottom of the positioning sleeve, and a first motor that drives the first lead screw to rotate is fixedly installed on the right side of the first slide groove.

[0009] In one possible implementation, the hollow cylinder and the hole groove are on the same axis, the locating ring coincides with the axis of the hollow cylinder and is located on the right side of the inner clamping plate, and the inner circumference of the locating ring is evenly distributed with a plurality of locating holes for installing mounting bolts, and the locating holes pass through the locating ring from left to right.

[0010] In one possible implementation, the telescopic assembly includes a second slide groove provided on a hollow cylinder, a scissors-type telescopic frame is rotatably installed inside the second slide groove and pushes the inner clamping plate to clamp the stator, the scissors-type telescopic frame is fixedly connected to the inner clamping plate at one end away from the second slide groove, a second lead screw is rotatably installed in the middle of the hollow cylinder, a second slider is connected to the external thread of the second lead screw, the second slider is slidably connected to the second slide groove, the second slider is rotatably connected to the scissors-type telescopic frame and drives the scissors-type telescopic frame to telescope and move, and a second motor that drives the second lead screw to rotate is fixedly connected to the right end of the hollow cylinder.

[0011] In one possible implementation, the positioning assembly includes a movable groove formed on the outer wall of the positioning ring, a positioning block is installed inside the movable groove for sliding left and right, the left end of the positioning block extends to the left side of the positioning ring and cooperates with the limiting groove outside the stator, and a return spring 2 is fixedly connected between the right side of the positioning block and the inner wall of the movable groove.

[0012] In one possible implementation, the bolt tightening assembly includes a guide rod fixedly mounted on the right side of a positioning ring and symmetrically distributed front to back, a mounting ring is slidably mounted on the outside of the guide rod, a left and right movable structure for driving the mounting ring to move left and right is mounted on the positioning ring, a tightening rod for tightening the mounting bolt is rotatably mounted on the mounting ring, the left end of the tightening rod matches the mounting bolt and is movably mounted inside the positioning hole, and a rotating mechanism for driving the tightening rod to rotate is mounted on the right side of the mounting ring.

[0013] In one possible implementation, the left-right moving structure includes a rectangular groove frame 2 fixedly mounted on the inner side of a mounting ring, a third lead screw is rotatably mounted inside the rectangular groove frame 2, a third slider is threadedly connected to the outside of the third lead screw, the bottom of the third slider is fixedly connected to the inner wall of the positioning ring, and a third motor for driving the third lead screw to rotate is fixedly mounted on the left side of the rectangular groove frame 2.

[0014] In one possible implementation, the rotating mechanism includes a transmission gear ring rotatably mounted on the right side of the mounting ring, the right end of the third lead screw passes through the right side of the rectangular groove frame 2 and is coaxially fixedly connected to a first gear, the first gear is meshed with the inner side of the transmission gear ring, the right end of the tightening rod passes through the right side of the mounting ring and is fixedly connected to a second gear, the second gear is meshed with the outer side of the transmission gear ring.

[0015] In one possible implementation, the limit assembly includes a sleeve fixedly connected to the outside of the positioning ring, the right side of the positioning sleeve is fixedly connected with a hook that cooperates with the sleeve, a wedge block is installed inside the sleeve for sliding back and forth, a return spring three is fixedly connected between the side of the wedge block close to the center of the positioning ring and the inner wall of the sleeve, the side of the wedge block close to the center of the positioning ring is fixedly connected to a pull rod, the end of the pull rod close to the center of the positioning ring slides through the interior of the positioning ring and is fixedly connected to a pull rope, the outside of the second screw is fixedly connected to a rope winding roller, and the end of the pull rope away from the corresponding pull rod passes through the corresponding second slide groove and is fixedly connected to the rope winding roller.

[0016] The beneficial effects of the present invention are as follows: 1. The present invention installs the stator through the coordinated use of the housing fixing mechanism, the lateral movement mechanism and the stator fixing mechanism. The positioning rod cooperates with the mounting hole on the motor housing to quickly position the motor housing. After the mounting bolts are installed on the positioning ring, the mounting bolts and the positioning assembly respectively cooperate with the fixing holes and the limiting grooves on the stator to quickly position the stator, thereby improving the accuracy of the docking of the threaded holes and the through holes. Then the lateral movement mechanism drives the positioning sleeve to move to the right to cover the motor housing on the stator. The limiting assembly can clamp the housing fixing mechanism and the stator fixing mechanism together to prevent the motor housing and the stator from being misaligned during the process of tightening the mounting bolts, which is beneficial to the installation and fixation of the motor housing and the stator by the mounting bolts.

[0017] 2. The present invention provides a bolt tightening assembly to tighten and install the mounting bolts. After the stator is installed in the motor housing, the tightening rod is driven to rotate by the rotating mechanism, so that the tightening rod tightens multiple mounting bolts at the same time. When the tightening rod tightens the mounting bolts, the left and right moving structure can drive the mounting ring to move left, so that the tightening rod can push the mounting bolt to move left during the process of tightening the mounting bolts. The rotating mechanism and the left and right moving structure are started by the same power source, which makes it convenient to tighten the mounting bolts into the threaded holes, and convenient to fix the motor housing and the stator. There is no need to use additional tools for tightening the mounting bolts for installation, thereby improving the efficiency of stator installation.

[0018] 3. In the present invention, when the telescopic assembly drives the inner clamping plate to retract inward to release the internal clamping of the stator, the telescopic assembly can simultaneously drive the limit assembly to unlock, so that the shell fixing mechanism and the stator fixing mechanism are separated, and then the lateral moving mechanism drives the shell fixing mechanism to move to the left, and the motor shell and the stator can be moved to the left together, so that the stator can be removed from the stator fixing mechanism. Finally, the motor shell and the stator can be pulled out of the shell fixing mechanism, thereby improving the efficiency of cutting the motor shell and the stator. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0020] Figure 2 It is a cross-sectional view of the front side of the present invention.

[0021] Figure 3 It is a three-dimensional structural schematic diagram of the shell fixing mechanism of the present invention.

[0022] Figure 4 It is a three-dimensional structural schematic diagram of the stator fixing mechanism of the present invention.

[0023] Figure 5 It is a three-dimensional structural schematic diagram of the positioning component of the present invention.

[0024] Figure 6It is a three-dimensional structural schematic diagram of the telescopic assembly of the present invention.

[0025] Figure 7 It is a three-dimensional structural sectional view of the bolt tightening assembly of the present invention.

[0026] Figure 8 It is a planar cross-sectional view of the limiting assembly of the present invention.

[0027] Fig. 9 It is a schematic diagram of the three-dimensional structure of the clamping sleeve and the clamping hook when they are matched with each other.

[0028] Fig.10 It is a schematic diagram of the three-dimensional structure of the stator.

[0029] In the figure: 1, U-shaped frame; 11, guide rod; 2, housing fixing mechanism; 21, positioning sleeve; 22, positioning rod; 23, outer clamping assembly; 231, rectangular slot frame 1; 232, clamping block; 233, return spring 1; 3, lateral movement mechanism; 31, first slide groove; 32, first lead screw; 33, first slider; 34, first motor; 4, stator fixing mechanism; 41, hollow cylinder; 42, inner clamping plate; 43, telescopic assembly; 431, second slide groove; 432, scissor-type telescopic frame; 433, second lead screw; 434, second slider; 435, second motor; 44, positioning ring; 441, positioning hole; 45, positioning assembly; 451, movable slot; 452, positioning block; 453, reset spring 2; 46, bolt tightening assembly; 461, guide rod; 462, mounting ring; 463, left and right moving structure; 4631, rectangular slot frame 2; 4632, third lead screw; 4633, third slider; 4634, third motor; 464, tightening rod; 465, rotating mechanism; 4651, transmission gear ring; 4652, first gear; 4653, second gear; 47, limiting assembly; 471, ferrule; 472, hook; 473, wedge block; 474, reset spring 3; 475, pull rod; 476, pull rope; 477, rope winding roller; 5, motor housing; 6, stator; 7, mounting bolts. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described below, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0031] See also Figure 1A stator mounting device for a brushless motor for an electric wheelchair comprises a C-shaped frame 1, wherein a guide rod 11 is fixedly connected front and back symmetrically between two vertical sections of the C-shaped frame 1, a shell fixing mechanism 2 is slidably mounted on the outside of the two guide rods 11, a lateral moving mechanism 3 for driving the shell fixing mechanism 2 to move left and right is mounted on the top of the horizontal section of the C-shaped frame 1, and a stator fixing mechanism 4 cooperating with the shell fixing mechanism 2 is mounted on the right vertical section of the C-shaped frame 1.

[0032] See also Figure 1 and Figure 3 The housing fixing mechanism 2 includes a positioning sleeve 21 that is slidably installed on the outside of the two guide rods 11. A hole groove that matches the shape of the motor housing 5 is opened in the middle of the positioning sleeve 21. A plurality of positioning rods 22 that are evenly distributed around the hole groove are fixedly connected to the right side of the positioning sleeve 21. The positioning rods 22 match the positions of the mounting holes on the motor housing 5. External clamping components 23 for clamping the motor housing 5 are installed on both the front and rear sides of the positioning sleeve 21.

[0033] See also Figure 1 and Figure 4 The stator fixing mechanism 4 includes a hollow cylinder 41 fixedly mounted on the right vertical section of the U-shaped frame 1, a plurality of inner clamping plates 42 are evenly distributed on the outer circumference of the hollow cylinder 41, a telescopic assembly 43 for driving the inner clamping plates 42 to clamp the stator 6 is installed on the hollow cylinder 41, a positioning ring 44 is fixedly connected to the outside of the hollow cylinder 41 through a support rod, a plurality of positioning assemblies 45 are evenly distributed on the outer circumference of the positioning ring 44, a bolt tightening assembly 46 is installed on the right side of the positioning ring 44, and a limiting assembly 47 is symmetrically installed on the outer circular wall of the positioning ring 44.

[0034] See also Figure 1 and Figure 3 The outer clamping assembly 23 includes a rectangular groove frame 231 fixedly installed on the side of the positioning sleeve 21, and a clamping block 232 is slidably installed on the side of the rectangular groove frame 231 close to the center of the positioning sleeve 21. The end of the clamping block 232 close to the center of the positioning sleeve 21 slides through the inside of the hole groove, and an inclined surface is provided on the right end of the clamping block 232. The right end of the inclined surface is inclined toward the end away from the center of the positioning sleeve 21, and a return spring 233 is fixedly connected between the side of the clamping block 232 away from the center of the positioning sleeve 21 and the rectangular groove frame 231.

[0035] When the housing fixing mechanism 2 fixes the motor housing 5, the motor housing 5 is moved to the left and installed in the hole groove. During installation, the mounting hole on the motor housing 5 should be aligned with the positioning rod 22, and the limiting groove on the outside of the motor housing 5 should be aligned with the positioning assembly 45 until the positioning rod 22 is inserted into the mounting hole. The motor housing 5 is positioned by the positioning rod 22 to improve the accuracy of installation of the motor housing 5 and the stator 6. In the process of inserting the motor housing 5 into the hole groove, the left end of the motor housing 5 can push the inclined surface of the clamping block 232 to move the clamping block 232 away from the center of the hole groove. When the motor housing 5 moves between the front and rear clamping blocks 232, the rebound force of the reset spring 233 is used to push the clamping block 232 to clamp the motor housing 5, thereby improving the stability of the motor housing 5.

[0036] See also Figure 1 and Figure 2 The lateral moving mechanism 3 includes a first slide groove 31 fixedly installed on the top of the horizontal section of the U-shaped frame 1, a first lead screw 32 is rotatably installed inside the first slide groove 31, a first slider 33 is sleeved on the external thread of the first lead screw 32, the first slider 33 is slidably installed inside the first slide groove 31, the top of the first slider 33 is fixedly connected to the bottom of the positioning sleeve 21, and a first motor 34 that drives the first lead screw 32 to rotate is fixedly installed on the right side of the first slide groove 31.

[0037] The first motor 34 drives the first lead screw 32 to rotate, so that the first slider 33 drives the positioning sleeve 21 to move to the right along the first slide groove 31, and the positioning sleeve 21 moves to the right with the motor housing 5 and is installed on the outside of the stator 6. The guide rod 11 can guide the positioning sleeve 21 to improve the stability of the movement of the positioning sleeve 21, so that the motor housing 5 and the stator 6 can be accurately installed together.

[0038] See also Figure 2 , Figure 5 and Figure 7 The hollow cylinder 41 and the hole groove are on the same axis, the positioning ring 44 coincides with the axis of the hollow cylinder 41 and is located on the right side of the inner clamping plate 42, and a plurality of positioning holes 441 for installing the mounting bolts 7 are evenly distributed on the inner circumference of the positioning ring 44, and the positioning holes 441 pass through the positioning ring 44 from left to right.

[0039] The mounting bolt 7 is installed by setting the positioning hole 441, and then the stator 6 is limited by the mounting bolt 7, which is conducive to aligning the stator 6 with the motor housing 5. After the motor housing 5 is installed to the outside of the stator 6, the mounting bolt 7 can be directly aligned with the threaded hole, which is convenient for the subsequent tightening and fixing of the mounting bolt 7.

[0040] See also Figure 5 , Figure 6 and Figure 7The telescopic assembly 43 includes a second slide groove 431 provided on the hollow cylinder 41, a scissor-type telescopic frame 432 is rotatably installed inside the second slide groove 431 for pushing the inner clamping plate 42 to clamp the stator 6, and the end of the scissor-type telescopic frame 432 away from the second slide groove 431 is fixedly connected to the inner clamping plate 42, a second lead screw 433 is rotatably installed in the middle of the hollow cylinder 41, and a second slider 434 is threadedly connected to the external thread of the second lead screw 433, and the second slider 434 is slidably connected to the second slide groove 431, and the second slider 434 is rotatably connected to the scissor-type telescopic frame 432 and drives the scissor-type telescopic frame 432 to telescope and move, and a second motor 435 that drives the second lead screw 433 to rotate is fixedly connected to the right end of the hollow cylinder 41.

[0041] When installing the stator 6, the right end of the stator 6 is fitted to the left side of the positioning ring 44, and the mounting bolt 7 is inserted into the fixing hole inside the stator 6. At this time, the stator 6 is just sleeved on the outside of the telescopic assembly 43. The second motor 435 drives the second lead screw 433 to rotate, so that the second slider 434 moves to the left and drives the scissor-type telescopic frame 432 to extend outward, so that the scissor-type telescopic frame 432 pushes the inner clamping plate 42 to clamp and fix the stator 6 internally, thereby improving the stability of the stator 6 during installation.

[0042] See also Figure 4 and Figure 5 The positioning assembly 45 includes a movable groove 451 opened on the outer wall of the positioning ring 44, and a positioning block 452 is slidably installed inside the movable groove 451. The left end of the positioning block 452 extends to the left side of the positioning ring 44 and cooperates with the limiting groove outside the stator 6. A return spring 453 is fixedly connected between the right side of the positioning block 452 and the inner wall of the movable groove 451.

[0043] When installing the stator 6, the positioning block 452 is aligned with the limiting groove outside the stator 6, and the rebound force of the movable groove 451 is used to push the positioning block 452 into the limiting groove, so as to position the stator 6 and prevent the stator 6 from deflecting during the installation process, so that the fixing hole in the stator 6 is aligned with the threaded hole in the motor housing 5, which is beneficial to the installation of the motor housing 5 and the stator 6.

[0044] See also Figure 4 and Figure 7The bolt tightening assembly 46 includes a guide rod 461 fixedly installed on the right side of the positioning ring 44 and symmetrically distributed front to back, a mounting ring 462 is installed on the outside of the guide rod 461 for sliding left and right, a left and right moving structure 463 for driving the mounting ring 462 to move left and right is installed on the positioning ring 44, a tightening rod 464 for tightening the mounting bolt 7 is rotatably installed on the mounting ring 462, the left end of the tightening rod 464 matches the mounting bolt 7 and is movably installed inside the positioning hole 441, and a rotating mechanism 465 for driving the tightening rod 464 to rotate is installed on the right side of the mounting ring 462.

[0045] See also Figure 7 The left-right moving structure 463 includes a rectangular groove frame 4631 fixedly installed on the inner side of the mounting ring 462, a third lead screw 4632 is rotatably installed inside the rectangular groove frame 4631, a third slider 4633 is threadedly connected to the outer side of the third lead screw 4632, the bottom of the third slider 4633 is fixedly connected to the inner wall of the positioning ring 44, and a third motor 4634 for driving the third lead screw 4632 to rotate is fixedly installed on the left side of the rectangular groove frame 4631.

[0046] See also Figure 7 The rotating mechanism 465 includes a transmission gear ring 4651 rotatably installed on the right side of the mounting ring 462. The right end of the third lead screw 4632 passes through the right side of the rectangular groove frame 4631 and is coaxially fixedly connected with the first gear 4652. The first gear 4652 meshes with the inner side of the transmission gear ring 4651. The right end of the tightening rod 464 passes through the right side of the mounting ring 462 and is fixedly connected with the second gear 4653. The second gear 4653 meshes with the outer side of the transmission gear ring 4651.

[0047] The third motor 4634 drives the third lead screw 4632 and the first gear 4652 to rotate, and then the first gear 4652 drives the transmission ring gear 4651 to rotate, and then the transmission ring gear 4651 drives the second gears 4653 to rotate, so that the tightening rod 464 drives the mounting bolt 7 to rotate, and when the third lead screw 4632 rotates, since the third slider 4633 remains stationary, the third lead screw 4632 will drive the rectangular slot frame 2 4631 to move to the left, and then the rectangular slot frame 2 4631 drives the mounting ring 462 to move to the left, so that the tightening rod 464 pushes the mounting bolt 7 to move to the left while rotating, and tightens the mounting bolt 7 into the threaded hole inside the motor housing 5, and multiple mounting bolts 7 are installed at the same time to improve the installation efficiency.

[0048] See also Figure 3 , Figure 4 , Figure 8 and Fig. 9The limiting assembly 47 includes a sleeve 471 fixedly connected to the outside of the positioning ring 44, a hook 472 matching the sleeve 471 is fixedly connected to the right side of the positioning sleeve 21, a wedge block 473 is installed inside the sleeve 471 for sliding back and forth, a return spring 474 is fixedly connected between the side of the wedge block 473 close to the center of the positioning ring 44 and the inner wall of the sleeve 471, a pull rod 475 is fixedly connected to the side of the wedge block 473 close to the center of the positioning ring 44, and a pull rope 476 is fixedly connected to the end of the pull rod 475 close to the center of the positioning ring 44 after sliding through the interior of the positioning ring 44, a rope roller 477 is fixedly connected to the outside of the second lead screw 433, and the end of the pull rope 476 away from the corresponding pull rod 475 passes through the corresponding second slide groove 431 and is fixedly connected to the rope roller 477.

[0049] When the motor housing 5 moves to the right and is installed on the outside of the stator 6, the hook 472 is just inserted into the inside of the sleeve 471. The hook 472 first pushes the wedge block 473 to move toward the center of the positioning ring 44 until the hook 472 completely enters the sleeve 471. At this time, the wedge block 473 moves in the opposite direction and resets and clamps the hook 472 under the action of the rebound force of the reset spring 474, fixing the positioning sleeve 21 and the positioning ring 44 together, thereby improving the stability of the motor housing 5 and the stator 6 when installing the mounting bolts 7.

[0050] When the lock of the hook 472 is to be released, the second motor 435 drives the second screw 433 to rotate in the opposite direction, and then the second screw 433 drives the rope winding roller 477 to rotate to reel in the pull rope 476. Then the pull rope 476 pulls the pull rod 475 and the wedge block 473 to move toward the center of the positioning ring 44, so that the wedge block 473 no longer clamps the hook 472. Then the horizontal moving mechanism 3 drives the positioning sleeve 21 to move to the left to separate the hook 472 from the sleeve 471.

[0051] See also Figure 1-Figure 9 When in use, step 1, align the motor housing 5 with the hole groove in the positioning sleeve 21, and then move the motor housing 5 to the left to insert it into the hole groove. When installing, align the mounting hole on the motor housing 5 with the positioning rod 22, and align the threaded hole in the motor housing 5 with the corresponding positioning hole 441. When the motor housing 5 is fully inserted into the hole groove, the positioning rod 22 is inserted into the mounting hole. In the process of inserting the motor housing 5 into the hole groove, the left end of the motor housing 5 first pushes the inclined surface of the clamping block 232 to move the clamping block 232 away from the center of the hole groove. When the motor housing 5 moves between the front and rear clamping blocks 232, the rebound force of the reset spring 233 is used to push the clamping block 232 to clamp the motor housing 5, thereby improving the stability of the motor housing 5.

[0052] Step 2, insert the mounting bolt 7 into the positioning hole 441, so that the right end of the mounting bolt 7 is connected to the tightening rod 464, and then align the stator 6 with the positioning ring 44, so that the mounting bolt 7 is aligned with the fixing hole in the stator 6, and then move the stator 6 to the right to abut it against the left side of the positioning ring 44, so that the mounting bolt 7 is inserted into the fixing hole, and at the same time, the positioning block 452 is inserted into the limiting groove outside the stator 6, and then the second motor 435 drives the second lead screw 433 to rotate, so that the second slider 434 moves to the left and drives the scissors-type telescopic frame 432 to extend outward, so that the scissors-type telescopic frame 432 pushes the inner clamping plate 42 to clamp and fix the stator 6 internally.

[0053] Step three, drive the first lead screw 32 to rotate through the first motor 34, so that the first slider 33 drives the positioning sleeve 21 to move to the right along the first slide groove 31, and the positioning sleeve 21 moves the motor housing 5 to the right and is installed on the outside of the stator 6. When the motor housing 5 is installed on the outside of the stator 6, the hook 472 is inserted into the inside of the sleeve 471, and the hook 472 first pushes the wedge block 473 to move toward the center of the positioning ring 44 until the hook 472 completely enters the sleeve 471. At this time, the wedge block 473 moves in the opposite direction under the action of the rebound force of the reset spring 474 to reset and clamp the hook 472.

[0054] Step 4, after the motor housing 5 is installed to the outside of the stator 6, the mounting bolt 7 is aligned with the threaded hole in the motor housing 5, and then the third motor 4634 drives the third lead screw 4632 and the first gear 4652 to rotate, and then the first gear 4652 drives the transmission ring gear 4651 to rotate, and then the transmission ring gear 4651 drives the second gears 4653 to rotate, so that the tightening rod 464 drives the mounting bolt 7 to rotate, and when the third lead screw 4632 rotates, since the third slider 4633 remains stationary, the third lead screw 4632 will drive the rectangular slot frame 2 4631 to move to the left, and then the rectangular slot frame 2 4631 drives the mounting ring 462 to move to the left, so that the tightening rod 464 pushes the mounting bolt 7 to move to the left while rotating, and tightens the mounting bolt 7 into the threaded hole inside the motor housing 5.

[0055] Step 5, drive the second lead screw 433 to rotate in the opposite direction through the second motor 435, so that the second slider 434 moves to the right along the second lead screw 433, and use the second slider 434 to drive the scissors-type telescopic frame 432 to retract inward, so that the inner clamping plate 42 no longer clamps the stator 6, and the second lead screw 433 rotates in the opposite direction while driving the rope winding roller 477 to rotate to rewind the pull rope 476, and then the pull rope 476 pulls the pull rod 475 and the wedge block 473 to move toward the center of the positioning ring 44, so that the wedge block 473 no longer gets stuck on the hook 472.

[0056] Step 6: The first motor 34 drives the first lead screw 32 to rotate in the opposite direction, so that the first slider 33 drives the positioning sleeve 21 to move leftward, and then the positioning sleeve 21 drives the motor housing 5 and the stator 6 to move leftward together, and then the motor housing 5 with the stator 6 installed is pulled out of the positioning sleeve 21 to the right.

[0057] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, an integral connection, or a sliding connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A stator mounting device for a brushless motor for an electric wheelchair, comprising a U-shaped frame (1), characterized in that: A guide rod (11) is symmetrically fixedly connected between the two vertical sections of the C-shaped frame (1), a housing fixing mechanism (2) is slidably mounted on the outside of the two guide rods (11) to the left and right, a lateral moving mechanism (3) for driving the housing fixing mechanism (2) to move left and right is mounted on the top of the horizontal section of the C-shaped frame (1), and a stator fixing mechanism (4) cooperating with the housing fixing mechanism (2) is mounted on the right vertical section of the C-shaped frame (1); The housing fixing mechanism (2) comprises a positioning sleeve (21) which is slidably mounted on the outside of two guide rods (11) to the left and right, a hole slot matching the outer shape of the motor housing (5) is opened in the middle of the positioning sleeve (21), a plurality of positioning rods (22) evenly distributed around the circumference of the hole slot are fixedly connected to the right side of the positioning sleeve (21), and external clamping components (23) for clamping the motor housing (5) are installed on both the front and rear sides of the positioning sleeve (21); The stator fixing mechanism (4) comprises a hollow cylinder (41) fixedly mounted on a right vertical section of a U-shaped frame (1); a plurality of inner clamping plates (42) are evenly distributed on the outer circumference of the hollow cylinder (41); a telescopic assembly (43) for driving the inner clamping plates (42) to clamp the stator (6) is mounted on the hollow cylinder (41); a positioning ring (44) is fixedly connected to the outer portion of the hollow cylinder (41) via a support rod; a plurality of positioning assemblies (45) are evenly distributed on the outer circumference of the positioning ring (44); a bolt tightening assembly (46) is mounted on the right side of the positioning ring (44); and a limit assembly (47) is symmetrically mounted on the outer circular wall of the positioning ring (44) in a front-to-back manner.

2. The stator mounting device of a brushless motor for an electric wheelchair according to claim 1, characterized in that: The outer clamping assembly (23) comprises a rectangular groove frame (231) fixedly mounted on the side of the positioning sleeve (21); a clamping block (232) is slidably mounted on a side of the rectangular groove frame (231) close to the center of the positioning sleeve (21) in a forward and backward manner; an end of the clamping block (232) close to the center of the positioning sleeve (21) slides through the interior of the hole groove; an inclined surface is arranged at the right end of the clamping block (232); the right end of the inclined surface is inclined toward an end away from the center of the positioning sleeve (21); a return spring (233) is fixedly connected between the side of the clamping block (232) away from the center of the positioning sleeve (21) and the rectangular groove frame (231).

3. The stator mounting device of a brushless motor for an electric wheelchair according to claim 1, characterized in that: The transverse moving mechanism (3) comprises a first slide groove (31) fixedly mounted on the top of the horizontal section of the U-shaped frame (1); a first lead screw (32) is rotatably mounted inside the first slide groove (31); a first slider (33) is sleeved on the outer thread of the first lead screw (32); the first slider (33) is slidably mounted inside the first slide groove (31) leftward and rightward; the top of the first slider (33) is fixedly connected to the bottom of the positioning sleeve (21); and a first motor (34) for driving the first lead screw (32) to rotate is fixedly mounted on the right side of the first slide groove (31).

4. The stator mounting device of a brushless motor for an electric wheelchair according to claim 1, characterized in that: The hollow cylinder (41) and the hole groove are located on the same axis, the positioning ring (44) coincides with the axis of the hollow cylinder (41) and is located on the right side of the inner clamping plate (42), and a plurality of positioning holes (441) for installing mounting bolts (7) are evenly distributed on the inner circumference of the positioning ring (44), and the positioning holes (441) penetrate the positioning ring (44) from left to right.

5. The stator mounting device of a brushless motor for an electric wheelchair according to claim 1, characterized in that: The telescopic assembly (43) comprises a second slide groove (431) provided on the hollow cylinder (41); a scissor-type telescopic frame (432) is rotatably installed inside the second slide groove (431) for pushing the inner clamping plate (42) to clamp the stator (6); one end of the scissor-type telescopic frame (432) away from the second slide groove (431) is fixedly connected to the inner clamping plate (42); a second lead screw (433) is rotatably installed in the middle of the hollow cylinder (41); a second slider (434) is threadedly connected to the outer side of the second lead screw (433); the second slider (434) is slidably connected to the second slide groove (431); the second slider (434) is rotatably connected to the scissor-type telescopic frame (432) and drives the scissor-type telescopic frame (432) to telescope and move; and a second motor (435) is fixedly connected to the right end of the hollow cylinder (41) for driving the second lead screw (433) to rotate.

6. The stator mounting device of a brushless motor for an electric wheelchair according to claim 1, characterized in that: The positioning assembly (45) comprises a movable groove (451) formed on the outer wall of the positioning ring (44); a positioning block (452) is slidably mounted inside the movable groove (451) to the left and right; the left end of the positioning block (452) extends to the left side of the positioning ring (44) and then matches with the limiting groove outside the stator (6); a second return spring (453) is fixedly connected between the right side of the positioning block (452) and the inner wall of the movable groove (451).

7. The stator mounting device of a brushless motor for an electric wheelchair according to claim 1, characterized in that: The bolt tightening assembly (46) comprises a guide rod (461) fixedly mounted on the right side of the positioning ring (44) and symmetrically distributed frontward and rearward; a mounting ring (462) is slidably mounted on the outside of the guide rod (461) for leftward and rightward movement; a leftward and rightward moving structure (463) for driving the mounting ring (462) to move leftward and rightward is mounted on the positioning ring (44); a tightening rod (464) for tightening the mounting bolt (7) is rotatably mounted on the mounting ring (462); the left end of the tightening rod (464) matches the mounting bolt (7) and is movably mounted inside the positioning hole (441); and a rotating mechanism (465) for driving the tightening rod (464) to rotate is mounted on the right side of the mounting ring (462).

8. The stator mounting device of a brushless motor for an electric wheelchair according to claim 7, characterized in that: The left-right moving structure (463) includes a rectangular groove frame 2 (4631) fixedly mounted on the inner side of the mounting ring (462), a third lead screw (4632) being rotatably mounted inside the rectangular groove frame 2 (4631), a third slider (4633) being threadedly connected to the outer side of the third lead screw (4632), a bottom of the third slider (4633) being fixedly connected to the inner wall of the positioning ring (44), and a third motor (4634) for driving the third lead screw (4632) to rotate being fixedly mounted on the left side of the rectangular groove frame 2 (4631).

9. The stator mounting device of a brushless motor for an electric wheelchair according to claim 8, characterized in that: The rotating mechanism (465) includes a transmission gear ring (4651) rotatably mounted on the right side of the mounting ring (462); the right end of the third lead screw (4632) passes through the right side of the second rectangular groove frame (4631) and is coaxially fixedly connected with a first gear (4652); the first gear (4652) is meshed with the inner side of the transmission gear ring (4651); the right end of the tightening rod (464) passes through the right side of the mounting ring (462) and is fixedly connected with a second gear (4653); the second gear (4653) is meshed with the outer side of the transmission gear ring (4651).

10. The stator mounting device of a brushless motor for an electric wheelchair according to claim 5, characterized in that: The limiting assembly (47) includes a clamping sleeve (471) fixedly connected to the outside of the positioning ring (44), a hook (472) matched with the clamping sleeve (471) is fixedly connected to the right side of the positioning sleeve (21), a wedge block (473) is slidably installed inside the clamping sleeve (471), a return spring (474) is fixedly connected between the side of the wedge block (473) close to the center of the positioning ring (44) and the inner wall of the clamping sleeve (471), and the wedge block (47 3) A pull rod (475) is fixedly connected to one side near the center of the positioning ring (44), and one end of the pull rod (475) near the center of the positioning ring (44) slides through the interior of the positioning ring (44) and is fixedly connected to a pull rope (476), and the outside of the second screw (433) is fixedly connected to a rope winding roller (477), and one end of the pull rope (476) away from the corresponding pull rod (475) passes through the corresponding second slide groove (431) and is fixedly connected to the rope winding roller (477).

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