Motor with rotating shaft capable of accurately regulating and controlling expansion and contraction amount

Abstract

The utility model provides a motor with a rotating shaft capable of accurately regulating and controlling the expansion and contraction amount. The motor comprises a motor rotating shaft, a first bearing, a second bearing, a motor shell, a motor stator, a motor rotor and a bearing piece, and further comprises a telescopic adjusting mechanism, and the telescopic adjusting mechanism comprises a driving motor, a motor push rod, a motor support plate, a displacement feedback device, an encoder, a circuit board and a display screen. The motor further comprises a plurality of wave-shaped gaskets and a plurality of bearing gaskets which are arranged in a stacked mode, and the wave-shaped gaskets and the bearing gaskets are connected to the motor rotating shaft in a sleeving mode. By arranging the waveform gasket and the bearing gasket, stretching and rebounding of the rotating shaft of the motor are achieved, obtained displacement information is fed back to the circuit board and the display screen through the displacement feedback device and the encoder which are installed on the driving motor, the displacement information can be accurately controlled on the display screen, the compression amount of the waveform gasket is accurately controlled, and therefore the compression efficiency of the motor is improved. The telescopic displacement distance of the motor rotating shaft is accurately controlled.

Description

Technical Field

[0001] The present disclosure relates to the technical field of motor shafts, and in particular to a motor whose shaft can accurately adjust the extension and contraction amount. Background Art

[0002] At present, the known rotating motor and electric spindle structure is that the stator is fixed on the inner wall of the shell, the rotor is fixed on the rotor shaft, and the two ends of the shaft are equipped with bearings. The bearings are fixedly installed on the center holes of the end covers on both sides of the stator and cannot move freely. With the increasing requirements for the use of motors, the demand for motors that can both rotate and retract is increasing.

[0003] The existing technology for realizing both rotation and extension of the motor mainly has the following problems:

[0004] 1. When the motor or electric spindle is in use, it only has the rotation function. When the axial displacement function is required, a guide rail must be added. Moreover, the entire motor must move at the same time. The interference caused by the small space will be difficult to eliminate and the displacement distance will be difficult to control.

[0005] 2. The existing telescopic rotating motor realizes the telescopic rotation function by driving the telescopic rotating mechanism through the motor. Since the upper end of the telescopic shaft needs to drive the accessories to move, and the mass of the accessories is relatively large, during operation, if it is not well controlled, the telescopic rotating motor will shake greatly, and the displacement distance is difficult to control.

[0006] 3. The existing telescopic rotating motor integrates the rotation and telescopic actions by adding several encoders, several rotating shafts, several motors, and ball screws to the original motor, resulting in a complex structure, difficult manufacturing, and high cost.

[0007] Therefore, there is a need for a motor whose shaft can accurately adjust the extension and retraction amount, whose extension and retraction distance can be adjusted, and which has a simple structure, is easy to manufacture, and has a low cost. Utility Model Content

[0008] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a motor with a rotating shaft capable of accurately adjusting the extension and retraction amount.

[0009] The purpose of this disclosure is achieved through the following technical solutions:

[0010] A motor with a rotating shaft capable of precisely regulating the telescopic amount comprises a motor rotating shaft, a first bearing, a second bearing, a motor housing, a motor stator, a motor rotor, and a receiving member, wherein the motor rotor is sleeved on the motor rotating shaft, the motor stator is fixedly connected to the motor housing, the motor rotor is located in the motor stator, the two ends of the motor rotating shaft are sleeved on the first bearing and the second bearing respectively, and the receiving member is located in the motor housing; further comprising a telescopic adjustment mechanism, the telescopic adjustment mechanism comprising a driving motor, a motor push rod, a motor support plate, a displacement feedback device, an encoder, a circuit board and a display screen, the motor push rod is mounted on the driving motor and arranged opposite to the receiving member, the motor push rod is used to push the receiving member, the motor support plate is connected to the motor housing, the driving motor is connected to the motor support plate, the displacement feedback device and the encoder are both electrically connected to the driving motor, the displacement feedback device and the encoder are both electrically connected to the circuit board, and the circuit board is electrically connected to the display screen; further comprising a plurality of corrugated gaskets and a plurality of bearing gaskets arranged in a stacked manner, the corrugated gaskets and the bearing gaskets are both sleeved on the motor rotating shaft.

[0011] In one embodiment, the corrugated gasket and the load-bearing gasket are both elastic gaskets.

[0012] In one embodiment, the first bearing and the second bearing are arranged opposite to each other so that the motor rotor is arranged coaxially with the motor shaft.

[0013] In one embodiment, steps are respectively provided at both ends of the motor shaft, and the first bearing and the second bearing are respectively fixed on the corresponding steps.

[0014] In one embodiment, the motor housing includes a first housing and a second housing, the first housing is connected to the second housing, and the motor stator is fixed between the first housing and the second housing.

[0015] In one embodiment, a plurality of first protrusions are protruding from the first shell, and a plurality of second protrusions are protruding from the second shell, and the first protrusions and the second protrusions are arranged in a one-to-one correspondence.

[0016] In one embodiment, the motor whose rotating shaft can accurately control the extension and retraction amount also includes a plurality of first screw connectors, the number of the first screw connectors is equal to the number of the first protrusions and the number of the second protrusions, the first protrusion is provided with a first screw hole, the second protrusion is provided with a second screw hole, the first screw connector passes through the first screw hole and the second screw hole in sequence to fix the first shell and the second shell in connection.

[0017] In one embodiment, the motor whose rotating shaft can accurately control the extension and retraction amount also includes a plurality of second screw connections, the motor bracket plate is provided with a plurality of third screw holes, and the bottom of the second outer shell is provided with a plurality of fourth screw holes, and the second screw connections pass through the third screw holes and the fourth screw holes in sequence to fix the motor bracket plate to the second outer shell.

[0018] In one embodiment, the receiving member is provided with an arc-shaped protrusion, and the arc-shaped protrusion is located on the outer side of the second shell and is arranged opposite to the motor push rod.

[0019] In one embodiment, a receiving groove is formed at the other end of the receiving member away from the arc-shaped protruding portion, and the second bearing is located in the receiving groove.

[0020] Compared with the prior art, the present invention has at least the following advantages:

[0021] The motor whose shaft can precisely control the extension amount is provided with a plurality of corrugated gaskets and a plurality of bearing gaskets stacked and sleeved on the motor shaft. The uppermost corrugated gasket abuts against the motor housing, and the lowermost corrugated gasket abuts against the first bearing. When the shaft needs to be extended and retracted, the driving motor drives the motor push rod to move in the direction of the receiving member, and then the motor shaft and the first bearing are driven and squeeze the corrugated gasket to realize the upward displacement of the motor shaft. When the driving motor drives the motor push rod to retract, the corrugated gasket rebounds and rebounds the motor shaft to realize the downward displacement of the motor shaft. At this time, the displacement feedback device and encoder installed on the driving motor will feedback the acquired displacement information to the circuit board and the display screen, and the displacement information can be precisely controlled on the display screen, so as to precisely control the compression amount of the corrugated gasket and realize the precise control of the extension and retraction displacement distance of the motor shaft. Furthermore, the motor realizes the precise control of the extension and retraction amount of the motor shaft by adding corrugated gaskets, bearing gaskets, a pair of displacement feedback devices and encoders, a pair of circuit boards and a display screen, and has a simple structure, convenient manufacturing and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, 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 disclosure 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.

[0023] Figure 1 A schematic diagram of the structure of a motor in which the rotating shaft can accurately adjust the extension and contraction amount according to an embodiment;

[0024] Figure 2 for Figure 1The exploded structural diagram of the motor whose rotating shaft can precisely control the extension and retraction amount is shown;

[0025] Figure 3 for Figure 1 Another exploded structural diagram of a motor whose rotating shaft can precisely control the extension and retraction amount;

[0026] Figure 4 for Figure 1 The cross-sectional structure diagram of the motor whose rotating shaft can accurately control the extension and contraction amount is shown;

[0027] Figure 5 for Figure 4 The cross-sectional structural schematic diagram shown is an enlarged structural schematic diagram at A;

[0028] Figure 6 for Figure 5 The enlarged schematic diagram at point A shown is an enlarged schematic diagram A' of the corrugated gasket after being compacted. DETAILED DESCRIPTION

[0029] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0030] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0032] The present invention provides a motor with a rotating shaft capable of accurately adjusting the telescopic amount, comprising a motor rotating shaft, a first bearing, a second bearing, a motor housing, a motor stator, a motor rotor, and a receiving member, wherein the motor rotor is sleeved on the motor rotating shaft, the motor stator is fixedly connected to the motor housing, the motor rotor is located in the motor stator, the two ends of the motor rotating shaft are sleeved on the first bearing and the second bearing respectively, and the receiving member is located in the motor housing; further comprising a telescopic adjustment mechanism, the telescopic adjustment mechanism comprising a driving motor, a motor push rod, a motor support plate, a displacement feedback device, an encoder, a circuit board and a display screen, the motor push rod is installed on the driving motor and arranged opposite to the receiving member, the motor push rod is used to push the receiving member, the motor support plate is connected to the motor housing, the driving motor is connected to the motor support plate, the displacement feedback device and the encoder are both electrically connected to the driving motor, the displacement feedback device and the encoder are both electrically connected to the circuit board, and the circuit board is electrically connected to the display screen.

[0033] The motor whose shaft can precisely control the extension amount is provided with a plurality of corrugated gaskets and a plurality of bearing gaskets stacked and sleeved on the motor shaft. The uppermost corrugated gasket abuts against the motor housing, and the lowermost corrugated gasket abuts against the first bearing. When the shaft needs to be extended and retracted, the driving motor drives the motor push rod to move in the direction of the receiving member, and then the motor shaft and the first bearing are driven and squeeze the corrugated gasket to realize the upward displacement of the motor shaft. When the driving motor drives the motor push rod to retract, the corrugated gasket rebounds and rebounds the motor shaft to realize the downward displacement of the motor shaft. At this time, the displacement feedback device and encoder installed on the driving motor will feedback the acquired displacement information to the circuit board and the display screen, and the displacement information can be precisely controlled on the display screen, so as to precisely control the compression amount of the corrugated gasket and realize the precise control of the extension and retraction displacement distance of the motor shaft. Furthermore, the motor realizes the precise control of the extension and retraction amount of the motor shaft by adding corrugated gaskets, bearing gaskets, a pair of displacement feedback devices and encoders, a pair of circuit boards and a display screen, and has a simple structure, convenient manufacturing and low cost.

[0034] In order to better understand the technical solutions and beneficial effects of the present invention, the present invention is further described in detail below in conjunction with specific embodiments:

[0035] like Figures 1 to 6As shown, a motor 10 with a rotating shaft capable of precisely adjusting the extension amount in one embodiment includes a motor rotating shaft 100, a first bearing 110, a second bearing 120, a motor housing 200, a motor stator 300, a motor rotor 400, and a receiving member 500, wherein the motor rotor 400 is sleeved on the motor rotating shaft 100, the motor stator 300 is fixedly connected to the motor housing 200, the motor rotor 400 is located in the motor stator 300, the two ends of the motor rotating shaft 100 are sleeved with the first bearing 110 and the second bearing 120 respectively, and the receiving member 500 is located in the motor housing 200;

[0036] It also includes a telescopic adjustment mechanism 600, which includes a driving motor 610, a motor push rod 620, a motor bracket plate 630, a displacement feedback device 640, an encoder 650, a circuit board 660 and a display screen 670. The motor push rod 620 is installed on the driving motor 610 and is arranged opposite to the receiving member 500. The motor push rod 620 passes through the motor bracket plate 630 and abuts against the receiving member 500. The motor push rod 620 is used to push the receiving member 500. The motor bracket plate 630 is connected to the motor housing 200. The driving motor 610 is connected to the motor bracket plate 630. The displacement feedback device 640 and the encoder 650 are both electrically connected to the driving motor 610. The displacement feedback device 640 and the encoder 650 are both electrically connected to the circuit board 660. The circuit board 660 is electrically connected to the display screen 670.

[0037] The motor further comprises a plurality of corrugated gaskets 700 and a plurality of bearing gaskets 800 which are stacked and arranged in layers. The corrugated gaskets 700 and the bearing gaskets 800 are both sleeved on the motor shaft 100 .

[0038] In this embodiment, the display screen 670 is used to input the telescopic adjustment amount, the displacement feedback device 640 is used to collect the current telescopic displacement of the motor push rod 620, and the encoder 650 is used to control the telescopic displacement of the motor push rod 620 according to the telescopic adjustment amount. The process of achieving precise control of the extension and retraction amount of the motor shaft 100 is as follows: first, the driving motor 610 drives the motor push rod 620 to move toward the receiving member 500, pushing the motor shaft 100 and the first bearing 110 to move upward at the same time, and the first bearing 110 abuts and squeezes the corrugated gasket 700. Then, when the driving motor 610 drives the motor push rod 620 to contract, the corrugated gasket 700 rebounds, and the first bearing 110 and the motor shaft 100 are rebounded. The first bearing 110 and the motor shaft 100 are rebounded to their original positions. At this time, the displacement feedback device 640 and the encoder 650 installed on the driving motor 610 will feed back the acquired displacement information to the circuit board 660 and the display screen 670. The display screen 670 is a touch display screen 670. The operator can judge whether the extension and retraction amount of the shaft reaches the expected amount according to the displacement information on the display screen 670, and adjust the displacement of the motor push rod 620 to precisely control the compression amount of the corrugated gasket 700, thereby realizing precise control of the extension and retraction displacement distance of the motor shaft 100.

[0039] The motor 10 with a rotating shaft capable of precisely adjusting the extension amount is provided with a plurality of corrugated gaskets 700 and a plurality of bearing gaskets 800 stacked and sleeved on the motor rotating shaft 100. The uppermost corrugated gasket 700 abuts against the motor housing 200, and the lowermost corrugated gasket 700 abuts against the first bearing 110. When the rotating shaft needs to be extended or retracted, the driving motor 610 drives the motor push rod 620 to move toward the receiving member 500, and then the motor rotating shaft 100 and the first bearing 110 are driven and squeeze the corrugated gasket 700, so that the motor rotating shaft 100 is extended or retracted. When the drive motor 610 drives the motor push rod 620 to retract, the corrugated gasket 700 rebounds and rebounds the motor shaft 100, so that the motor shaft 100 moves downward. At this time, the displacement feedback device 640 and the encoder 650 installed on the drive motor 610 will feedback the acquired displacement information to the circuit board 660 and the display screen 670, and the displacement information can be accurately controlled on the display screen 670, so as to accurately control the compression amount of the corrugated gasket 700 and realize accurate control of the telescopic displacement distance of the motor shaft 100. Furthermore, the motor realizes accurate control of the telescopic amount of the motor shaft 100 by adding a corrugated gasket 700, a bearing gasket 800, a pair of displacement feedback devices 640 and encoders 650, a pair of circuit boards 660 and a display screen 670, and has a simple structure, convenient manufacturing, and low cost.

[0040] like Figures 4 to 6As shown, in one embodiment, the corrugated gasket 700 and the bearing gasket 800 are both elastic gaskets. In this embodiment, the corrugated gasket 700 and the bearing gasket 800 are both elastically deformable elastic gaskets. It can be understood that the rebound of the motor shaft 100 can be achieved through the resilience of the corrugated gasket 700 and the bearing gasket 800, and its elastic properties can eliminate vibration and noise when it is subjected to axial force, thereby improving the stability and life of the motor.

[0041] like Figures 1 to 3 As shown, in one embodiment, the first bearing 110 and the second bearing 120 are arranged relative to each other so that the motor rotor 400 is coaxially arranged with the motor shaft 100. In this embodiment, the first bearing 110 and the second bearing 120 are arranged relative to each other to ensure that the motor rotor 400 is coaxially arranged with the motor shaft 100, that is, to ensure that the motor shaft 100 can move in the same linear direction when telescoping, thereby improving the telescopic stability.

[0042] like Figures 1 to 3 As shown, in one embodiment, steps 130 are respectively provided at both ends of the motor shaft 100, and the first bearing 110 and the second bearing 120 are respectively fixed on the corresponding steps 130. In this embodiment, the first bearing 110 and the second bearing 120 are fixed on the motor housing 200 by providing the step 130 structure, that is, the first bearing 110 and the second bearing 120 are both clamped between the step 130 and the motor housing 200 to prevent the first bearing 110 and the second bearing 120 from sliding.

[0043] like Figures 1 to 3 As shown, in one embodiment, the motor housing 200 includes a first housing 210 and a second housing 220, the first housing 210 is connected to the second housing 220, and the motor stator 300 is fixed between the first housing 210 and the second housing 220. In this embodiment, the motor housing 200 is not a completely closed structure, and the motor stator 300 is exposed to the outside, so that the installation and maintenance of the motor are convenient.

[0044] like Figures 1 to 3As shown, in one embodiment, the motor 10 whose rotating shaft can precisely control the extension amount further includes a plurality of first screw connectors 910, the number of which is equal to the number of the first protrusions 211 and the number of the second protrusions 221, the first protrusion 211 is provided with a first screw connection hole (not shown), the second protrusion 221 is provided with a second screw connection hole (not shown), the first screw connector 910 sequentially passes through the first screw connection hole and the second screw connection hole to fix the first housing 210 and the second housing 220. In this embodiment, the first screw connector 910 is a screw, which passes through the first screw connection hole and the second screw connection hole in sequence to fix the first housing 210 and the second housing 220 through threads, thereby improving the connection strength between the first housing 210 and the second housing 220.

[0045] like Figures 1 to 3 As shown, in one embodiment, the motor 10 whose rotating shaft can precisely control the extension amount further includes a plurality of second screwed members 920, the motor bracket plate 630 is provided with a plurality of third screwed holes (not shown), and the bottom of the second housing 220 is provided with a plurality of fourth screwed holes (not shown), and the second screwed member 920 passes through the third screwed holes and the fourth screwed holes in sequence, so that the motor bracket plate 630 is fixedly connected to the second housing 220. In this embodiment, the second screwed member 920 is a screw, and the screw passes through the third screwed hole and the fourth screwed hole in sequence, so that the motor bracket plate 630 is fixedly connected to the second housing 220 by threads, thereby improving the connection strength between the motor bracket plate 630 and the second housing 220.

[0046] like Figures 1 to 3 As shown, in one embodiment, the receiving member 500 is provided with an arc-shaped protrusion 510, and the arc-shaped protrusion 510 is located outside the second housing 220 and is arranged opposite to the motor push rod 620. In this embodiment, by providing the arc-shaped protrusion 510, when the motor push rod 620 abuts against and pushes the receiving member 500, the bottom plane of the receiving member 500 will not be directly stressed, thereby causing damage to the receiving member 500, thereby improving the stability of the motor.

[0047] like Figures 1 to 3 As shown, in one embodiment, the other end of the receiving member 500 away from the arc-shaped protrusion 510 is provided with a receiving groove 501, and the second bearing 120 is located in the receiving groove 501. In this embodiment, by providing the receiving member 500 with the receiving groove 501 that matches the shape of the second bearing 120, the second bearing 120 is protected from damage caused by abnormal collision during the compression and contraction process, thereby improving the stability of the motor.

[0048] Compared with the prior art, the present invention has at least the following advantages:

[0049] The motor 10 with a rotating shaft capable of precisely adjusting the extension amount is provided with a plurality of corrugated gaskets 700 and a plurality of bearing gaskets 800 stacked and sleeved on the motor rotating shaft 100. The uppermost corrugated gasket 700 abuts against the motor housing 200, and the lowermost corrugated gasket 700 abuts against the first bearing 110. When the rotating shaft needs to be extended or retracted, the driving motor 610 drives the motor push rod 620 to move toward the receiving member 500, and then the motor rotating shaft 100 and the first bearing 110 are driven and squeeze the corrugated gasket 700, so that the motor rotating shaft 100 is extended or retracted. When the drive motor 610 drives the motor push rod 620 to retract, the corrugated gasket 700 rebounds and rebounds the motor shaft 100, so that the motor shaft 100 moves downward. At this time, the displacement feedback device 640 and the encoder 650 installed on the drive motor 610 will feedback the acquired displacement information to the circuit board 660 and the display screen 670, and the displacement information can be accurately controlled on the display screen 670, so as to accurately control the compression amount of the corrugated gasket 700 and realize accurate control of the telescopic displacement distance of the motor shaft 100. Furthermore, the motor realizes accurate control of the telescopic amount of the motor shaft 100 by adding a corrugated gasket 700, a bearing gasket 800, a pair of displacement feedback devices 640 and encoders 650, a pair of circuit boards 660 and a display screen 670, and has a simple structure, convenient manufacturing, and low cost.

[0050] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the patent of the present disclosure shall be based on the attached claims.

Claims

1. A motor with a rotating shaft capable of precisely adjusting the extension and contraction amount, comprising a motor rotating shaft, a first bearing, a second bearing, a motor housing, a motor stator, a motor rotor, and a receiving member, wherein the motor rotor is sleeved on the motor rotating shaft, the motor stator is fixedly connected to the motor housing, the motor rotor is located in the motor stator, the two ends of the motor rotating shaft are sleeved on the first bearing and the second bearing respectively, and the receiving member is located in the motor housing, characterized in that: It also includes a telescopic adjustment mechanism, which includes a driving motor, a motor push rod, a motor bracket plate, a displacement feedback device, an encoder, a circuit board and a display screen. The motor push rod is installed on the driving motor and is arranged opposite to the receiving member. The motor push rod is used to push the receiving member. The motor bracket plate is connected to the motor housing. The driving motor is connected to the motor bracket plate. The displacement feedback device and the encoder are both electrically connected to the driving motor. The displacement feedback device and the encoder are both electrically connected to the circuit board. The circuit board is electrically connected to the display screen. It also includes a plurality of corrugated gaskets and a plurality of bearing gaskets which are stacked, and the corrugated gaskets and the bearing gaskets are both sleeved on the motor shaft.

2. The motor with a rotating shaft capable of precisely adjusting the extension and contraction amount according to claim 1, characterized in that: The corrugated gasket and the load-bearing gasket are both elastic gaskets.

3. The motor with a rotating shaft capable of precisely adjusting the extension and retraction amount according to claim 1, characterized in that: The first bearing and the second bearing are arranged opposite to each other so that the motor rotor and the motor shaft are arranged coaxially.

4. The motor with a rotating shaft capable of precisely adjusting the extension and contraction amount according to claim 1, characterized in that: Steps are respectively arranged at both ends of the motor shaft, and the first bearing and the second bearing are respectively fixed on the corresponding steps.

5. The motor with a rotating shaft capable of precisely adjusting the extension and contraction amount according to claim 1, characterized in that: The motor housing comprises a first housing and a second housing, the first housing is connected to the second housing, and the motor stator is fixed between the first housing and the second housing.

6. The motor with a rotating shaft capable of precisely adjusting the extension and contraction amount according to claim 5, characterized in that: A plurality of first protrusions are protruding from the first shell, and a plurality of second protrusions are protruding from the second shell. The first protrusions and the second protrusions are arranged in a one-to-one correspondence.

7. The motor with a rotating shaft capable of precisely adjusting the extension and contraction amount according to claim 6, characterized in that: The motor whose rotating shaft can accurately control the extension and contraction amount also includes a plurality of first screw connectors, the number of the first screw connectors is equal to the number of the first protrusions and the number of the second protrusions, the first protrusions are provided with a first screw hole, the second protrusions are provided with a second screw hole, and the first screw connector passes through the first screw hole and the second screw hole in sequence to fix the first shell and the second shell in connection.

8. The motor with a rotating shaft capable of precisely adjusting the extension and contraction amount according to claim 5, characterized in that: The motor whose rotating shaft can accurately control the extension and retraction amount also includes a plurality of second screw connections, the motor bracket plate is provided with a plurality of third screw holes, and the bottom of the second shell is provided with a plurality of fourth screw holes. The second screw connections pass through the third screw holes and the fourth screw holes in sequence to fix the motor bracket plate to the second shell.

9. The motor with a rotating shaft capable of precisely adjusting the extension and contraction amount according to claim 5, characterized in that: The receiving member is provided with an arc-shaped protrusion, and the arc-shaped protrusion is located outside the second housing and is arranged opposite to the motor push rod.

10. The motor with a rotating shaft capable of precisely adjusting the extension and contraction amount according to claim 9, characterized in that: The other end of the receiving member away from the arc-shaped protruding portion is provided with a receiving groove, and the second bearing is located in the receiving groove.

Images