A vacuum pump motor allowing axial movement

Abstract

The present invention discloses a vacuum pump motor that allows axial movement, which is used to drive the vacuum pump body to rotate, and at least includes a motor body, a motor shaft is provided at the end of the motor body, a movement chamber is provided at the end of the motor shaft, and a movement terminal is detachably provided in the movement chamber; the movement chamber includes an axial insertion cavity, a locking ring groove, and a movement compression spring; the movement terminal includes a movement base, a terminal inner cavity, an anti-drop lock, and a drive assembly. The vacuum pump motor that allows axial movement described in this case has a movement terminal provided at the end of its motor shaft with an axial movement amount; further, the movement compression spring can give an extrusion force to the movement terminal, so that the movement terminal provides a certain elastic damping when it is pressed to move to the right under normal conditions; further, the elastic force adjustment device can also be used to adjust the compression amount and elastic force of the movement compression spring under normal conditions.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and in particular to a vacuum pump motor that allows axial movement. Background Art

[0002] In order for a vacuum pump to achieve vacuum efficiently, the gap between the impeller working surface and the pump cover must be small and stable. Due to the large axial force generated during the operation of the equipment, the motor shaft of the vacuum pump is required to have a small amount of movement to give the impeller shaft of the vacuum pump a certain axial pressure. Therefore, it is necessary to improve the design of the vacuum pump motor so that it can maintain its displacement capacity and generate a certain elastic force. Summary of the invention

[0003] A vacuum pump motor that allows axial movement is used to drive a vacuum pump body to rotate, and at least comprises a motor body, a motor shaft is provided at the end of the motor body, a movement chamber is provided at the end of the motor shaft, and a movement terminal is detachably provided in the movement chamber;

[0004] The movement chamber comprises an axial insertion chamber arranged at the left end of the motor shaft, a locking ring groove arranged on the inner wall of the axial insertion chamber, and a movement compression spring arranged at the bottom of the axial insertion chamber;

[0005] The movable terminal includes a movable base, a terminal inner cavity, an anti-drop lock, and a drive assembly;

[0006] The said moving base comprises a base cylinder, an axial insertion rod arranged on the right side of the base cylinder and plugged into the axial insertion cavity, and a transmission insertion key arranged outside the said base cylinder;

[0007] The terminal inner cavity comprises a locking longitudinal hole arranged on the right side of the axial insertion rod, a locking transverse hole arranged on the left side of the locking longitudinal hole, a rotation-stopping insertion rod arranged on the right side of the inner wall of the locking transverse hole, and a narrow-diameter convex ring arranged on the left side of the inner wall of the locking transverse hole;

[0008] The anti-slip lock head is provided with a pair, and the upper and lower parts of the locking longitudinal holes are each provided with an anti-slip lock head, and the anti-slip lock head comprises a lock head base slidably arranged in the locking longitudinal hole, a driven inclined surface formed on the left side of the lock head base and gradually deviating from left to right toward the central axis of the axial insertion rod, a spring side cavity formed on the right side of the lock head base, and a spring core shaft arranged in the spring side cavity, and the anti-slip lock head also comprises a perforated lug arranged on the right side of the locking longitudinal hole and inserted into the spring side cavity, and the perforated lug is plug-matched with the corresponding spring core shaft, and the anti-slip lock head also comprises a lock head compression spring wound around the spring core shaft, and the lock head compression spring drives the corresponding anti-slip lock head to move toward the central axis of the axial insertion rod;

[0009] The driving assembly includes a driving round rod rotatably arranged in the locking transverse hole, a narrow-diameter ring groove formed on the outer wall of the driving round rod and matched with the narrow-diameter convex ring, an internal threaded hole formed on the right side of the driving round rod, a first externally threaded rod screwed in the internal threaded hole, a rotation-stopping longitudinal hole formed in the first externally threaded rod and plugged into the rotation-stopping plug rod, and an active cone head formed on the right side of the first externally threaded rod, which is wider on the left and narrower on the right.

[0010] As a further implementation:

[0011] The terminal inner cavity also includes a longitudinal adjustment cavity arranged on the left side of the locking transverse hole, an upper opening arranged at the upper end of the longitudinal adjustment cavity, a limiting convex ring arranged on the inner wall of the longitudinal adjustment cavity, a lower opening arranged at the lower end of the longitudinal adjustment cavity, and fixed locking teeth uniformly distributed on the lower end surface of the longitudinal adjustment cavity in the circumferential direction;

[0012] The movable terminal also includes a side adjustment component for driving the round rod to rotate;

[0013] The side adjustment assembly includes a side adjustment shaft rotatably arranged in the longitudinal adjustment cavity, a limiting ring groove formed on the outer wall of the side adjustment shaft and matched with the limiting convex ring, an adjusting lower shaft arranged at the lower end of the side adjustment shaft, an active bevel gear arranged at the lower end of the outer wall of the adjusting lower shaft, a spring lower hole arranged at the lower end of the adjusting lower shaft, a side adjustment pressure spring arranged in the spring lower hole, a follower block rod arranged at the lower end of the inner wall of the spring lower hole, an active plug rod slidably arranged in the spring lower hole and abutting against the side adjustment pressure spring, an active plug hole formed in the active plug rod and matched with the follower block rod, and a rotating lock disk arranged at the lower end of the active plug rod, and a movable lock tooth matched with the fixed lock tooth is formed on the lower end surface of the rotating lock disk;

[0014] A driven bevel gear meshing with the driving bevel gear is provided on the left side of the driving round rod.

[0015] As a further implementation:

[0016] The movement chamber further comprises an axial insertion hole arranged on the inner wall of the axial insertion chamber, a connecting through hole arranged at the right end of the axial insertion chamber, a transmission chamber arranged on the right side of the connecting through hole, and an adjusting lower hole arranged at the lower end of the transmission chamber;

[0017] The said moving chamber is also provided with an elastic force adjustment device for adjusting the elastic force of the moving compression spring, the said elastic force adjustment device comprises an internal threaded ring slidably arranged on the inner wall of the said axial insertion chamber and resting on the right side of the moving compression spring, a limit plug arranged on the outer wall of the said internal threaded ring and plugged with the axial insertion hole, a second external threaded rod meshed with the internal threaded ring, the second external threaded rod is inserted into the transmission chamber after passing through the connecting through hole, a transverse axis bevel gear is arranged on the right end of the second external threaded rod, an adjustment longitudinal rod is rotatably arranged in the said adjustment lower hole, and a longitudinal axis bevel gear meshed with the transverse axis bevel gear is arranged on the upper end of the said adjustment longitudinal rod. Furthermore, the said axial insertion holes are provided with at least three, and the said axial insertion holes are evenly spaced along the circumferential direction on the inner wall of the axial insertion chamber.

[0018] As a further implementation:

[0019] Active key blocks are evenly distributed along the circumference of the left outer edge of the motor shaft, and driven key blocks corresponding to the active key blocks and staggered and plugged in are arranged on the right side of the basic cylinder.

[0020] As a further implementation:

[0021] The axial length of the locking ring groove is greater than the left-right dimension of the lock base.

[0022] A slotted or cross groove is provided in the middle of the lower end surface of the rotating lock plate to match a slotted or cross screwdriver.

[0023] Beneficial effect: The vacuum pump motor described in this case allows axial movement, and the movement terminal arranged at the end of the motor shaft has an axial movement amount: the movement terminal realizes transmission connection with the vacuum pump impeller shaft through a transmission key; and the axial movement of the movement terminal in the movement chamber is realized by the plug-in cooperation of the anti-drop lock head and the locking ring groove.

[0024] The present case describes a vacuum pump motor that allows axial movement, wherein the movement compression spring can provide an extrusion force to the movement terminal, so that a certain elastic damping is provided when the movement terminal is normally pressed and moves to the right; further, the compression amount and elastic force of the movement compression spring under normal conditions can be adjusted by an elastic force adjustment device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 Schematic diagram of an embodiment of the vacuum pump.

[0027] Figure 2 Schematic diagram of an embodiment of a vacuum pump motor.

[0028] Figure 3 It is a schematic diagram of an embodiment of the motor shaft and the movable terminal.

[0029] Figure 4 It is a schematic diagram of an embodiment of the motor shaft, the movement chamber, and the movement terminal.

[0030] Figure 5 It is a schematic diagram of an embodiment of the motor shaft, the movement chamber, and the movement terminal.

[0031] Figure 6 It is a cross-sectional view of an embodiment of the movement chamber.

[0032] Figure 7 It is a cross-sectional view of an embodiment of the movement chamber and the elastic force adjustment device.

[0033] Figure 8 It is a cross-sectional view of an embodiment of the movable terminal.

[0034] Fig. 9 It is a cross-sectional view of another embodiment of the movable terminal.

[0035] Fig.10 It is a cross-sectional view of another embodiment of the movable terminal.

[0036] Fig.11 It is a cross-sectional view of an embodiment of the terminal inner cavity.

[0037] Fig.12 yes Fig.10 Enlarged schematic diagram of part A in the middle.

[0038] In the figure:

[0039] 9. Vacuum pump body;

[0040] 8. Motor body;

[0041] 7. Motor shaft;

[0042] 6. Moving chamber, 61. Axial insertion chamber, 62. Locking ring groove, 63. Moving compression spring, 64. Axial insertion hole, 65. Connecting through hole, 66. Transmission chamber, 67. Adjusting lower hole, 68. Active key block;

[0043] 5. Move the terminal;

[0044] 51. Moving base, 511. Base cylinder, 512. Axial plug rod, 513. Transmission plug key, 514. Driven key block;

[0045] 52. Terminal cavity, 521. Locking longitudinal hole, 522. Locking transverse hole, 523. Anti-rotation plug rod, 524. Narrow diameter convex ring, 525. Vertical adjustment cavity, 526. Upper opening, 527. Limiting convex ring, 528. Lower opening, 529. Fixed locking teeth;

[0046] 53. Anti-drop lock, 531. Lock base, 532. Follower slope, 533. Spring side cavity, 534. Spring mandrel, 535. Lug with hole, 536. Lock compression spring;

[0047] 54. Driving assembly, 541. Driving round rod, 542. Narrow diameter annular groove, 543. Internal threaded hole, 544. First external threaded rod, 545. Anti-rotation longitudinal hole, 546. Active cone head;

[0048] 55. Side adjustment assembly, 551. Side adjustment shaft, 552. Limiting ring groove, 553. Adjusting lower shaft, 554. Active bevel gear, 555. Spring lower hole, 556. Side adjustment compression spring, 557. Follow-up stop rod, 558. Active plug rod, 559. Active plug hole, 5510. Rotating lock plate;

[0049] 4. Elastic force adjustment device, 41. Internal thread ring, 42. Limit plug, 43. Second external thread rod, 44. Transverse axis bevel gear, 45. Adjusting longitudinal rod, 46. Longitudinal axis bevel gear. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0051] A vacuum pump motor that allows axial movement is used to drive a vacuum pump body 9 to rotate, comprising at least a motor body 8, a motor shaft 7 is provided at the end of the motor body 8, a movement chamber 6 is provided at the end of the motor shaft 7, and a movement terminal 5 is detachably provided in the movement chamber 6;

[0052] The movement chamber 6 includes an axial insertion chamber 61 disposed at the left end of the motor shaft 7, a locking ring groove 62 disposed on the inner wall of the axial insertion chamber 61, and a movement compression spring 63 disposed at the bottom of the axial insertion chamber 61;

[0053] The movable terminal 5 includes a movable base 51, a terminal inner cavity 52, an anti-drop lock 53, and a driving assembly 54;

[0054] The said moving base 51 comprises a base cylinder 511, an axial insertion rod 512 arranged on the right side of the base cylinder 511 and plugged into the axial insertion cavity 61, and a transmission insertion key 513 arranged outside the said base cylinder 511;

[0055] The terminal inner cavity 52 includes a locking longitudinal hole 521 disposed on the right side of the axial insertion rod 512, a locking transverse hole 522 disposed on the left side of the locking longitudinal hole 521, a rotation-stopping insertion rod 523 disposed on the right side of the inner wall of the locking transverse hole 522, and a narrow-diameter protruding ring 524 disposed on the left side of the inner wall of the locking transverse hole 522;

[0056] The anti-slip lock head 53 is provided with a pair, and an anti-slip lock head 53 is respectively provided on the upper and lower sides of the locking longitudinal hole 521, and the anti-slip lock head 53 includes a lock head base 531 slidably arranged in the locking longitudinal hole 521, a driven inclined surface 532 formed on the left side of the lock head base 531 and gradually deviating from left to right toward the central axis of the axial insertion rod 512, a spring side cavity 533 formed on the right side of the lock head base 531, and a spring core shaft 534 arranged in the spring side cavity 533. The anti-slip lock head 53 also includes a perforated lug 535 arranged on the right side of the locking longitudinal hole 521 and inserted into the spring side cavity 533, and the perforated lug 535 is plug-matched with the corresponding spring core shaft 534. The anti-slip lock head 53 also includes a lock head compression spring 536 wound around the spring core shaft 534, and the lock head compression spring 536 drives the corresponding anti-slip lock head 53 to move toward the central axis direction of the axial insertion rod 512;

[0057] The driving assembly 54 includes a driving rod 541 rotatably arranged in the locking transverse hole 522, a narrow-diameter annular groove 542 formed on the outer wall of the driving rod 541 and cooperating with the narrow-diameter convex ring 524, an internal threaded hole 543 formed on the right side of the driving rod 541, a first externally threaded rod 544 screwed in the internal threaded hole 543, a rotation-stopping longitudinal hole 545 formed in the first externally threaded rod 544 and plugged into the rotation-stopping plug rod 523, and an active cone head 546 formed on the right side of the first externally threaded rod 544, which is wider on the left and narrower on the right.

[0058] As a further implementation:

[0059] The terminal inner cavity 52 further includes a longitudinal adjustment cavity 525 disposed on the left side of the locking horizontal hole 522, an upper opening 526 disposed at the upper end of the longitudinal adjustment cavity 525, a limiting convex ring 527 disposed on the inner wall of the longitudinal adjustment cavity 525, a lower opening 528 disposed at the lower end of the longitudinal adjustment cavity 525, and fixed locking teeth 529 uniformly distributed circumferentially on the lower end surface of the longitudinal adjustment cavity 525;

[0060] The movable terminal 5 also includes a side adjustment component 55 for driving the round rod 541 to rotate;

[0061] The side adjustment assembly 55 includes a side adjustment shaft 551 rotatably disposed in the longitudinal adjustment cavity 525, a limiting ring groove 552 formed on the outer wall of the side adjustment shaft 551 and matched with the limiting convex ring 527, an adjustment lower shaft 553 disposed at the lower end of the side adjustment shaft 551, an active bevel gear 554 disposed at the lower end of the outer wall of the adjustment lower shaft 553, a spring lower hole 555 disposed at the lower end of the adjustment lower shaft 553, and a side adjustment A compression spring 556, a follower stopper 557 disposed at the lower end of the inner wall of the spring lower hole 555, an active plug rod 558 slidably disposed in the spring lower hole 555 and abutting against the side-adjusting compression spring 556, an active plug hole 559 formed in the active plug rod 558 and cooperating with the follower stopper 557, and a rotating lock plate 5510 disposed at the lower end of the active plug rod 558, wherein the lower end surface of the rotating lock plate 5510 is formed with a movable lock tooth cooperating with the fixed lock tooth 529;

[0062] A driven bevel gear 547 meshing with the driving bevel gear 554 is disposed on the left side of the driving round rod 541 .

[0063] As a further implementation:

[0064] The movement chamber 6 further includes an axial insertion hole 64 provided on the inner wall of the axial insertion chamber 61, a connecting through hole 65 provided at the right end of the axial insertion chamber 61, a transmission chamber 66 provided on the right side of the connecting through hole 65, and an adjusting lower hole 67 provided at the lower end of the transmission chamber 66;

[0065] The movement chamber 6 is also provided with an elastic force adjustment device 4 for adjusting the elastic force of the movement compression spring 63, and the elastic force adjustment device 4 includes an internal threaded ring 41 slidably arranged on the inner wall of the axial insertion cavity 61 and abutting against the right side of the movement compression spring 63, a limit plug 42 arranged on the outer wall of the internal threaded ring 41 and plugged with the axial insertion hole 64, and a second external threaded rod 43 meshed with the internal threaded ring 41. The second external threaded rod 43 passes through the connecting through hole 65 and is inserted into the transmission chamber 66. A transverse axis bevel gear 44 is provided at the right end of the second external threaded rod 43, and an adjustment longitudinal rod 45 is rotatably provided in the adjustment lower hole 67. A longitudinal axis bevel gear 46 meshing with the transverse axis bevel gear 44 is provided at the upper end of the adjustment longitudinal rod 45.

[0066] As a further implementation:

[0067] There are at least three axial insertion holes 64 .

[0068] As a further implementation:

[0069] The axial insertion holes 64 are distributed at equal intervals along the circumferential direction on the inner wall of the axial insertion cavity 61 .

[0070] As a further implementation:

[0071] Active key blocks 68 are evenly distributed along the circumference of the left outer edge of the motor shaft 7 , and passive key blocks 514 corresponding to the active key blocks 68 and staggeredly plugged are arranged on the right side of the base cylinder 511 .

[0072] As a further implementation:

[0073] The axial length of the locking ring groove 62 is greater than the left-right dimension of the lock base 531 .

[0074] A slotted or cross groove is provided in the middle of the lower end surface of the rotating lock plate 5510 to fit a slotted or cross screwdriver.

[0075] The motor shaft 7 of the motor described in this case is provided with a moving chamber 6 and allows the moving terminal 5 to slide in the moving chamber 6. The installation method of the moving terminal 5 is as follows:

[0076] Step 1, insert:

[0077] Under normal conditions, the anti-drop lock 53 is retracted in the moving base 51, and the axial insertion rod 512 of the moving terminal 5 is inserted into the axial insertion cavity 61 at the end of the motor shaft 7. At the same time, the active key block 68 and the driven key block 514 are plugged in one by one.

[0078] Step 2, complete the locking:

[0079] The rotating lock plate 5510 and the active insertion rod 558 are pressed upward through the lower opening 528 to overcome the damping of the side pressure-adjusting spring 556 and move upward, and the rotating lock plate 5510 is disengaged from the fixed lock tooth 529 and unlocked;

[0080] The rotating lock plate 5510, the active plug rod 558, and the active plug hole 559 are twisted to drive the follower stop rod 557, the side adjustment shaft 551, and the active bevel gear 554 to rotate. The rotation of the active bevel gear 554 drives the driven bevel gear 547, the driving round rod 541, and the internal threaded hole 543 to rotate, driving the anti-rotation longitudinal hole 545 and the active cone head 546 to move rightward. The active cone head 546 acts on the driven inclined surface 532 to drive the anti-drop lock head 53 to extend outward and insert into the locking ring groove 62.

[0081] Step 3, the side adjustment assembly 55 is reset:

[0082] Loosening the rotating lock disk 5510 allows it to return downward under the action of the side pressure-adjusting spring 556, and the rotating lock disk 5510 contacts the fixed lock tooth 529, locking the rotational freedom of the drive assembly 54, and maintaining the stable posture of the drive assembly 54 and the anti-disengagement lock head 53.

[0083] As a further embodiment, the method further includes step 4, adjusting the damping of the movement of the moving terminal 5 in the moving chamber 6:

[0084] The longitudinal rod 45 and the longitudinal axis bevel gear 46 are rotated to drive the transverse axis bevel gear 44 and the second external threaded rod 43 to rotate, and the internal threaded ring 41 and the limit plug 42 to move left and right, so as to realize the compression amount and damping of the moving compression spring 63 under normal conditions.

Claims

1. A vacuum pump motor that allows axial movement, used to drive a vacuum pump body (9) to rotate, comprising at least a motor body (8), wherein a motor shaft (7) is provided at the end of the motor body (8), characterized in that: A movement chamber (6) is provided at the end of the motor shaft (7), and a movement terminal (5) is detachably provided in the movement chamber (6); The oscillation chamber (6) comprises an axial insertion chamber (61) provided at the left end of the motor shaft (7), a locking ring groove (62) provided on the inner wall of the axial insertion chamber (61), and an oscillation compression spring (63) provided at the bottom of the axial insertion chamber (61); The movable terminal (5) comprises a movable base (51), a terminal inner cavity (52), an anti-drop lock (53), and a drive assembly (54); The movable base (51) comprises a base cylinder (511), an axial insertion rod (512) arranged on the right side of the base cylinder (511) and plugged into the axial insertion cavity (61), and a transmission insertion key (513) arranged outside the base cylinder (511); The terminal inner cavity (52) comprises a locking longitudinal hole (521) arranged on the right side of the axial insertion rod (512), a locking transverse hole (522) arranged on the left side of the locking longitudinal hole (521), a rotation-stopping insertion rod (523) arranged on the right side of the inner wall of the locking transverse hole (522), and a narrow-diameter protruding ring (524) arranged on the left side of the inner wall of the locking transverse hole (522); The anti-dropout lock head (53) is provided with a pair, and one anti-dropout lock head (53) is provided on the upper and lower sides of the locking longitudinal hole (521), respectively. The anti-dropout lock head (53) comprises a lock head base (531) slidably arranged in the locking longitudinal hole (521), a driven inclined surface (532) formed on the left side of the lock head base (531) and gradually deviating from left to right toward the central axis of the axial insertion rod (512), a spring side cavity (533) formed on the right side of the lock head base (531), and a spring side cavity (533) provided in the spring side cavity (533). The spring core shaft (534), the anti-slip lock head (53) further comprising a lug with a hole (535) arranged on the right side of the locking longitudinal hole (521) and inserted into the spring side cavity (533), the lug with a hole (535) being plug-fitted with the corresponding spring core shaft (534), the anti-slip lock head (53) further comprising a lock head compression spring (536) wound around the spring core shaft (534), the lock head compression spring (536) driving the corresponding anti-slip lock head (53) to move in the direction of the central axis of the axial insertion rod (512); The driving assembly (54) comprises a driving rod (541) rotatably arranged in the locking transverse hole (522), a narrow-diameter annular groove (542) formed on the outer wall of the driving rod (541) and cooperating with the narrow-diameter convex ring (524), an internal threaded hole (543) formed on the right side of the driving rod (541), a first externally threaded rod (544) screwed into the internal threaded hole (543), a rotation-stopping longitudinal hole (545) formed in the first externally threaded rod (544) and plug-matched with the rotation-stopping plug rod (523), and an active cone head (546) formed on the right side of the first externally threaded rod (544) and having a wider left side and a narrower right side.

2. A vacuum pump motor that allows axial movement according to claim 1, characterized in that: The terminal inner cavity (52) further comprises a longitudinal adjustment cavity (525) arranged on the left side of the locking transverse hole (522), an upper opening (526) arranged at the upper end of the longitudinal adjustment cavity (525), a limiting convex ring (527) arranged on the inner wall of the longitudinal adjustment cavity (525), a lower opening (528) arranged at the lower end of the longitudinal adjustment cavity (525), and fixed locking teeth (529) uniformly distributed in the circumferential direction on the lower end surface of the longitudinal adjustment cavity (525); The movable terminal (5) further comprises a side adjustment component (55) for driving the round rod (541) to rotate; The side adjustment assembly (55) comprises a side adjustment shaft (551) rotatably disposed in the longitudinal adjustment cavity (525), a limiting ring groove (552) formed on the outer wall of the side adjustment shaft (551) and cooperating with a limiting convex ring (527), an adjustment lower shaft (553) disposed at the lower end of the side adjustment shaft (551), an active bevel gear (554) disposed at the lower end of the outer wall of the adjustment lower shaft (553), a spring lower hole (555) disposed at the lower end of the adjustment lower shaft (553), and a side adjustment shaft (551) disposed in the spring lower hole (555). A compression spring (556), a follower stopper (557) disposed at the lower end of the inner wall of the spring lower hole (555), an active insertion rod (558) slidably disposed in the spring lower hole (555) and abutting against the side-adjusting compression spring (556), an active insertion hole (559) formed in the active insertion rod (558) and cooperating with the follower stopper (557), and a rotating lock plate (5510) disposed at the lower end of the active insertion rod (558), wherein the lower end surface of the rotating lock plate (5510) is formed with a movable lock tooth cooperating with the fixed lock tooth (529); A driven bevel gear (547) meshing with the driving bevel gear (554) is provided on the left side of the driving round rod (541).

3. A vacuum pump motor that allows axial movement according to claim 2, characterized in that: The movement chamber (6) further comprises an axial insertion hole (64) provided on the inner wall of the axial insertion chamber (61), a connecting through hole (65) provided at the right end of the axial insertion chamber (61), a transmission chamber (66) provided on the right side of the connecting through hole (65), and an adjusting lower hole (67) provided at the lower end of the transmission chamber (66); The said movement chamber (6) is also provided with an elastic force adjustment device (4) for adjusting the elastic force of the movement compression spring (63), the said elastic force adjustment device (4) comprising an internal threaded ring (41) slidably arranged on the inner wall of the said axial insertion chamber (61) and resting on the right side of the movement compression spring (63), a limit plug (42) arranged on the outer wall of the said internal threaded ring (41) and plugged with the axial insertion hole (64), and a second external threaded rod (43) meshed with the internal threaded ring (41), the second external threaded rod (43) passing through the connecting through hole (65) and then inserted into the transmission chamber (66), a transverse axis bevel gear (44) being provided at the right end of the second external threaded rod (43), an adjustment longitudinal rod (45) being rotatably provided in the said adjustment lower hole (67), and a longitudinal axis bevel gear (46) meshing with the transverse axis bevel gear (44) being provided at the upper end of the said adjustment longitudinal rod (45).

4. A vacuum pump motor that allows axial movement according to claim 3, characterized in that: At least three axial insertion holes (64) are provided.

5. The vacuum pump motor that allows axial movement according to claim 3, characterized in that: The axial insertion holes (64) are distributed at equal intervals along the circumferential direction on the inner wall of the axial insertion cavity (61).

6. A vacuum pump motor that allows axial movement according to claim 5, characterized in that: Active key blocks (68) are evenly distributed in the circumferential direction on the left outer edge of the motor shaft (7), and driven key blocks (514) corresponding to the active key blocks (68) and staggered and plugged in are provided on the right side of the base cylinder (511).

7. A vacuum pump motor that allows axial movement according to claim 6, characterized in that: The axial length of the locking ring groove (62) is greater than the left-right dimension of the lock base (531).

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