CN107147240B

CN107147240B - Anti-theft hoisting motor and unlocking device thereof

Info

Publication number: CN107147240B
Application number: CN201710532691.3A
Authority: CN
Inventors: 孟鹏; 周国鹏
Original assignee: Hubei University of Science and Technology
Current assignee: Hubei University of Science and Technology
Priority date: 2017-07-03
Filing date: 2017-07-03
Publication date: 2023-04-14
Anticipated expiration: 2037-07-03
Also published as: CN107147240A

Abstract

The invention provides an anti-theft hoisting motor and an unlocking device thereof, and belongs to the technical field of electromechanical equipment. It has solved current hoisting motor technical problem such as stolen easily. A theft-proof hoisting motor comprises a cover and a machine body, wherein a plurality of mounting holes are formed in the cover, a plurality of connecting holes with internal threads are formed in the cover, each connecting hole is connected with the corresponding mounting hole through a locking device, an unlocking device comprises a handle, the handle is of a hollow structure, a main gear is fixedly arranged in the handle, four slave gears which are in one-to-one correspondence with avoidance holes are further arranged in the handle, the main gear is simultaneously meshed with the four slave gears, a pull rod is fixedly arranged on each slave gear, and external threads are formed in the outer ends of the pull rods; the outer end of the pull rod can be in threaded connection with the connecting screw hole; the pull rod can be inserted into the corresponding avoiding hole. The invention has the advantages of simple structure, high anti-theft index and the like.

Description

Anti-theft hoisting motor and unlocking device thereof

Technical Field

The invention belongs to the technical field of electromechanical equipment, and relates to an anti-theft hoisting motor and an unlocking device thereof.

Background

As a core element of a hoisting device, a hoisting motor is often placed outdoors, a shell of the hoisting motor is not a target of theft by a lawless person due to the reasons of heavy weight, firm connection with other bases, low price and the like, and an inner core of the motor is a key point of theft protection due to the fact that the price is not so high.

Disclosure of Invention

The invention aims to solve the problems of the prior art and provides a theft-proof lifting motor, and the technical problem to be solved by the invention is how to prevent the inner core of the motor from being stolen by locking bolts for fixing the motor shell and an end cover.

The purpose of the invention can be realized by the following technical scheme: the anti-theft hoisting motor comprises a cover and a machine body, and is characterized in that a plurality of mounting holes are formed in the end cover, a plurality of connecting holes with internal threads are formed in the cover, each connecting hole is connected with the corresponding mounting hole through a locking device, each locking device comprises a connecting screw rod matched with the corresponding connecting hole, the outer end part of each connecting screw rod is provided with a dismounting head, a dismounting hole with an outer end opening is formed in each dismounting head, the cross section of each dismounting hole is square, each of the four inner walls of each mounting hole is provided with a unlocking hole, each unlocking hole is internally provided with a T-shaped unlocking bolt in an inserted mode, the inner end of each unlocking bolt is provided with an unlocking inclined plane which is acute to the axis of each connecting screw rod, the outer end of each dismounting hole is provided with a positioning part, the aperture of each positioning part is larger than that of each dismounting hole, each dismounting head is sleeved with a locking cap, the inner wall of each locking cap is provided with four positioning bulges in one-to-one correspondence with the positioning parts, the positioning bulges are inserted into the corresponding positioning parts, each connecting screw rod is sleeved with an anti-dismounting baffle, the locking caps with the locking caps which shield the openings of the locking caps are positioned outside of the locking caps, and the thickness of the positioning bosses is larger than that of the gaps between the positioning caps between the outer walls of the positioning caps.

A connecting screw for fixing cover and organism, under the parcel of locking cap, can't be opened easily, and the locking cap is fixed on the dismouting head of connecting screw outer end through the protruding cooperation with location portion in location, wants to open connecting screw, must open the locking cap, inserts the downthehole realization of dismouting in the dismouting head through the four corners spanner, opens the locking cap and must be through inserting the downthehole specialized tool of dismouting with four unblocks bolts ejecting can.

In the anti-theft hoisting motor, four positioning holes are formed in the bottom wall of the dismounting hole, a positioning rod is inserted into each positioning hole, an unlocking plate is fixedly arranged at the outer end part of each positioning rod, the unlocking plate is circular, external threads are formed on the outer peripheral surface of the unlocking plate, and the four unlocking plates are sequentially in threaded engagement; the four unlocking plates can respectively push the four unlocking bolts to move towards the outer ends of the unlocking holes.

In the anti-theft hoisting motor, the unlocking plate is provided with a connecting screw hole, and the connecting screw hole is concentric with the unlocking plate.

In the anti-theft hoisting motor, each inner wall of the mounting hole is provided with a barrier strip, and the barrier strips are positioned on the outer sides of the unlocking bolts in the mounting holes.

In the anti-theft hoisting motor, the outer side wall of the dismounting head is a curved surface, and the outline of the locking cap is matched with the dismounting head.

In the anti-theft hoisting motor, the end cover is provided with a locking hole communicated with the mounting hole, and a locking bolt is connected in the locking hole in a threaded manner. The locking bolt can prevent that connecting screw is not hard up.

In the anti-theft hoisting motor, the outer end face of the locking cap is provided with four avoidance holes which are opposite to the connecting screw holes one by one.

In the above anti-theft hoisting motor, preferably, the inner wall of the check ring is provided with an electromagnetic valve corresponding to one of the unlocking bolts, the electromagnetic valve has a first electromagnetic coil, the inner wall of the check ring is provided with a first contact switch, a second contact switch, a third contact switch and a fourth contact switch, the first contact switch, the second contact switch, the third contact switch and the fourth contact switch can be contacted with the outer wall of the unlocking cap and triggered when the unlocking bolt is ejected out, the first contact switch and the second contact switch correspond to two of the unlocking bolts opposite to each other, and the third contact switch and the fourth contact switch correspond to the other two unlocking bolts opposite to each other; the anti-theft hoisting motor further comprises a first control power supply and a second control power supply, the first contact switch is connected with the second contact switch in parallel, the third contact switch is connected with the fourth contact switch in parallel, the first control power supply, the first magnetizing coil, the first contact switch and the second contact switch are connected in series, and the second control power supply, the first magnetizing coil, the third contact switch and the fourth contact switch are connected in series.

In the anti-theft hoisting motor, preferably, a positioning block made of graphite material is arranged at the bottom of the positioning hole, and a positioning notch matched with the positioning block is formed in the positioning rod.

Triggering the contact switch I or the contact switch II, switching on the magnetic generating coil, ejecting the electromagnetic valve, propping against the locking cap, and not allowing the corresponding unlocking bolt of the electromagnetic valve to eject, namely the locking cap cannot be detached; triggering the contact switch III or the contact switch IV, switching on the magnetic generating coil, ejecting the electromagnetic valve, propping against the locking cap, and not allowing the corresponding unlocking bolt of the electromagnetic valve to eject, namely the locking cap cannot be detached; the magnetic generating coil can be disconnected only when the contact switch I or the contact switch II and the contact switch III or the contact switch IV are triggered in pairs.

Because the first contact switch corresponds to the two opposite unlocking bolts and the third contact switch corresponds to the other two opposite unlocking bolts, the end cover of the hoisting motor can not be opened by the following method based on the two opposite unlocking bolts:

single screw insertion, trying to open the locking cap: the single screw rod is inserted into the connecting screw hole, the screw rod is difficult to be connected with the connecting screw hole due to the functions of the positioning block and the positioning protrusion, if the screw rod can be inserted into the connecting screw hole under the action of strong pressure, even if the positioning block and the positioning protrusion do not have a slipping effect, the unlocking plates are inevitably caused to rotate, in the rotating process of the unlocking plates, under the mutual screw transmission effect, two opposite unlocking plates and the other two opposite unlocking plates respectively move along two different directions of the positioning rod, wherein the two unlocking plates moving towards the outer ends of the positioning holes reach the positions in contact with the unlocking pins in advance and push the unlocking pins to be ejected out, when the two unlocking pins are completely ejected out, the unlocking plates are limited by the blocking strips and cannot continue to move outwards, and even if a thief pulls the screw rod to try to eject all the unlocking pins out, the effect cannot be achieved.

Two screws are inserted diagonally at the same time, trying to open the locking cap: the unlocking bolt has the effect that the unlocking bolt is communicated with one screw rod and cannot be ejected out simultaneously.

That is, as long as there is relative rotation between the unlocking plates, relative longitudinal displacement can occur, and unlocking cannot be achieved.

The purpose of unlocking can be achieved only by connecting the four unlocking plates synchronously through a special tool.

In addition, the anti-theft hoisting motor is also provided with an electric control locking device, when two adjacent unlocking plates cannot simultaneously jack the unlocking bolt, the electromagnetic valve is triggered, so that the gap for detaching the locking cap is shielded, and only synchronous contact or all contact is available.

The unlocking device of the anti-theft hoisting motor is characterized by comprising a handle, wherein the handle is of a hollow structure, a master gear is fixedly arranged in the handle, four slave gears which correspond to avoidance holes one to one are further arranged in the handle, the master gear is meshed with the four slave gears simultaneously, a pull rod is fixedly arranged on each slave gear, and the outer end of each pull rod is provided with an external thread; the outer end of the pull rod can be in threaded connection with the connecting screw hole; the pull rod can be inserted into the corresponding avoiding hole.

In the unlocking device for stealing the hoisting motor, the unlocking device further comprises a collar with internal threads, and the pull rod is provided with external threads matched with the internal threads of the collar.

The opening mode is as follows: insert corresponding dodge hole respectively with four pull rods to make the pull rod push up and connect the screw, rotatory handle makes four pull rods syntropy rotate, because four unlocking plates receive the moment of torsion of equidirectional, mutual locking between four unlocking plates, can't realize rotatoryly, with the pull rod with be connected the screw after, outer pull handle can be simultaneously ejecting four unblock bolts, thereby get rid of the tight cap of unblock, take out the locking bolt, the dismouting head can be opened to the conventional four corners spanner of rethread.

The distance between the locking cap and the handle can be increased by rotating the sleeve ring, so that the pull rod can be pulled out.

Compared with the prior art, the invention has the following advantages:

1. the anti-theft hoisting motor can realize the locking between the motor body and the motor cover through a pure mechanical structure, and prevent the motor from being stolen; reliable structure and low manufacturing cost.

2. The unlocking difficulty coefficient can be enhanced through a synchronous circuit.

3. Through simple structure, convenient operation's unlocking device, can realize opening easily between the organism of motor and the cover.

Drawings

Fig. 1 is a schematic diagram of the whole structure of the anti-theft hoisting motor.

Fig. 2 is an enlarged view of a portion C in fig. 1.

Fig. 3 is a schematic structural view of the anti-theft device of the anti-theft lifting motor.

Fig. 4 is a schematic structural view of the unlocking device.

Fig. 5 is a schematic view of the assembly of the unlocking means and the anti-theft device.

Fig. 6 is a sectional view in the direction a in fig. 5.

Fig. 7 is a sectional view in the direction B in fig. 5.

Fig. 8 is a schematic diagram of an anti-theft circuit in the anti-theft lifting motor.

In the figure, a cover; b. a body; 11. connecting a screw rod; 12. disassembling the head; 13. disassembling and assembling holes; 14. unlocking the hole; 15. unlocking the bolt; 16. unlocking the inclined plane; 17. a positioning part; 18. a locking cap; 19. positioning the projection; 21. a tamper-evident barrier; 22. a retainer ring; 23. positioning holes; 24. positioning a rod; 25. an unlocking plate; 26. a connecting screw hole; 27. blocking strips; 28. a locking hole; 29. locking the bolt; 3. avoiding holes; 41. positioning a block; 42. a positioning notch; 51. a handle; 52. a main gear; 53. a slave gear; 54. a pull rod; 55. a collar; l, a magnetism generating coil; s1, a first contact switch; s2, contacting a switch II; s3, a contact switch III; s4, a contact switch IV; e1, controlling a first power supply; e2, controlling a second power supply.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1, 2, 3, 5 and 7, a theft-proof hoisting motor comprises a cover a and a body b, the cover a is provided with a plurality of dismounting holes 13, the cover a is provided with a plurality of connecting holes with internal threads, each connecting hole is connected with the dismounting hole 13 through a locking device, the locking device comprises a connecting screw rod 11 matched with the connecting hole, the outer end part of the connecting screw rod 11 is provided with a dismounting head 12, the dismounting head 12 is internally provided with a dismounting hole 13 with an outer end opening, the cross section of the dismounting hole 13 is square, four inner walls of the dismounting hole 13 are respectively provided with a dismounting hole 14, a T-shaped dismounting bolt 15 is inserted into the dismounting hole 14, the inner end of the dismounting bolt 15 is provided with a dismounting inclined plane 16 forming an acute angle with the axis of the connecting screw rod 11, the outer end of the dismounting hole 13 is provided with a positioning portion 17, the diameter of the positioning portion 17 is larger than that of the dismounting hole 13, the dismounting hole is sleeved with a locking cap 18 on the dismounting head 12, the inner wall of the locking cap 18 is provided with four positioning protrusions 19 corresponding to the positioning portions 17, the locking protrusions are inserted into the corresponding locking protrusions 19, the outer wall of the locking cap 18 is sleeved with a locking ring 21, the locking cap 21, the outer wall of the locking cap 18 is provided with a gap between the outer wall of the connecting baffle plate 21, and the baffle plate 18 is provided with a gap between the baffle plate 22, and the baffle plate 18.

The connecting screw 11 for fixing the cover a and the machine body b cannot be easily opened under the wrapping of the locking cap 18, the locking cap 18 is fixed on the dismounting head 12 at the outer end of the connecting screw 11 through the matching of the positioning bulge 19 and the positioning part 17, the locking cap 18 must be opened when the connecting screw 11 is required to be opened, the four-corner wrench is inserted into the dismounting hole 13 in the dismounting head 12 to realize the purpose, and the four unlocking bolts 15 must be ejected out by a special tool inserted into the dismounting hole 13 when the locking cap 18 is opened.

Four positioning holes 23 are formed in the bottom wall of the dismounting hole 13, positioning rods 24 are inserted into the positioning holes 23 respectively, an unlocking plate 25 is fixedly arranged at the outer end portions of the positioning rods 24, the unlocking plate 25 is circular, external threads are formed in the outer peripheral surface of the unlocking plate 25, and the four unlocking plates 25 are sequentially in threaded engagement; the four unlocking plates 25 can respectively push the four unlocking bolts 15 to move towards the outer ends of the unlocking holes 14; the unlocking plate 25 is provided with a connecting screw hole 26, and the connecting screw hole 26 is concentric with the unlocking plate 25; each inner wall of the dismounting hole 13 is provided with a barrier strip 27, and the barrier strip 27 is positioned outside the unlocking bolt 15 in the dismounting hole 13.

The outer side wall of the dismounting head 12 is a curved surface, and the outline of the locking cap 18 is matched with the dismounting head 12; the end cover is provided with a locking hole 28 communicated with the dismounting hole 13, and a locking bolt 29 is connected with the locking hole 28 in a threaded manner. The locking bolt 29 can prevent the connecting screw 11 from loosening; the outer end face of the locking cap 18 is provided with four avoidance holes 3 which are opposite to the connecting screw holes 26 one by one.

Preferably, an electromagnetic valve corresponding to one of the unlocking plugs 15 is arranged on the inner wall of the retainer ring 22, the electromagnetic valve is provided with a raw magnetic coil L, a first contact switch S1, a second contact switch S2, a third contact switch S3 and a fourth contact switch S4 are arranged on the inner wall of the retainer ring 22, the first contact switch S1, the second contact switch S2, the third contact switch S3 and the fourth contact switch S4 can be in contact with the outer wall of the unlocking cap and triggered when the unlocking plug 15 is ejected out, the first contact switch S1 and the second contact switch S2 correspond to two of the unlocking plugs 15 which are opposite, and the third contact switch S3 and the fourth contact switch S4 correspond to the other two opposite unlocking plugs 15; the anti-theft hoisting motor further comprises a first control power supply E1 and a second control power supply E2, the first contact switch S1 is connected with the second contact switch S2 in parallel, the third contact switch S3 is connected with the fourth contact switch S4 in parallel, the first control power supply E1, the magnetizing coil L, the first contact switch S1 and the second contact switch S2 are connected in series, and the second control power supply E2, the magnetizing coil L, the third contact switch S3 and the fourth contact switch S4 are connected in series.

Preferably, a positioning block 41 made of graphite material is disposed at the bottom of the positioning hole 23, and a positioning notch 42 engaged with the positioning block 41 is formed on the positioning rod 24.

As shown in fig. 1 and 8, when the first contact switch S1 and/or the second contact switch S2 is triggered, the magnetic coil L is switched on, the electromagnetic valve pops up and abuts against the locking cap 18, the unlocking bolt 15 corresponding to the electromagnetic valve is not allowed to pop up, that is, the locking cap 18 cannot be removed; triggering a contact switch III S3 and/or a contact switch IV S4, switching on the magnetic generating coil L, popping up the electromagnetic valve, propping against the locking cap 18, and not allowing the unlocking bolt 15 corresponding to the electromagnetic valve to pop up, namely the locking cap 18 cannot be detached; the magnetic generating coil L can be disconnected only when the first contact switch S1 or the second contact switch S2 and the third contact switch S3 or the fourth contact switch S4 are triggered in pairs.

Because the first contact switch S1 and the second contact switch S2 correspond to two opposite unlocking bolts 15, and the third contact switch S3 and the fourth contact switch S4 correspond to the other two opposite unlocking bolts 15, the end cover of the hoisting motor can not be opened based on the following mode:

single screw insertion, trying to open the locking cap 18: a single screw is inserted into the connecting screw hole 26, the screw is difficult to be connected with the connecting screw hole 26 due to the action of the positioning block 41 and the positioning protrusion 19, if the screw can be inserted into the connecting screw hole 26 under the action of strong pressure, even if the positioning block 41 and the positioning protrusion 19 do not have a slipping action, the unlocking plates 25 are inevitably caused to rotate, in the rotating process of the unlocking plates 25, under the action of mutual thread transmission, the two opposite unlocking plates 25 and the other two opposite unlocking plates 25 respectively move along two different directions of the positioning rod 24, wherein the two unlocking plates 25 moving towards the outer end of the positioning hole 23 reach positions contacted with the unlocking pins 15 in advance and push the unlocking pins 15 to eject, when the two unlocking pins 15 are completely ejected, the unlocking plates 25 are limited by the barrier strip 27 and cannot continue to move outside, even if a thief pulls the screw to try to eject all the unlocking pins 15, the effect cannot be realized.

Two screws are inserted diagonally at the same time, trying to open the locking cap 18: the effect is communicated with a screw, and all the unlocking bolts 15 cannot be ejected out simultaneously.

That is, as long as there is relative rotation between the unlocking plates 25, relative longitudinal displacement can occur, and unlocking cannot be achieved.

The purpose of unlocking can be achieved only by connecting the four unlocking plates 25 synchronously through a special tool.

In addition, the anti-theft hoisting motor is also provided with an electric control locking device, when two adjacent unlocking plates 25 cannot simultaneously jack the unlocking bolt 15, the electromagnetic valve is triggered, so that the gap for detaching the locking cap 18 is shielded, and only synchronous contact or all contact is needed.

As shown in fig. 1, 2, 4, 5 and 6, the unlocking device for the anti-theft lifting motor comprises a handle 51, wherein the handle 51 is a hollow structure, a main gear 52 is fixedly arranged in the handle 51, four secondary gears 53 corresponding to the avoidance holes 3 one by one are further arranged in the handle 51, the main gear 52 is simultaneously meshed with the four secondary gears 53, a pull rod 54 is respectively fixedly arranged on the secondary gears 53, and the outer end of the pull rod 54 is provided with an external thread; the outer end of the pull rod 54 can be in threaded connection with the connecting screw hole 26; the pull rod 54 can be inserted in the corresponding avoiding hole 3.

The unlocking means further comprises a collar 55 with an internal thread, and the pull rod 54 is provided with an external thread matching the internal thread of the collar 55.

The opening mode is as follows: insert corresponding dodging hole 3 respectively with four pull rods 54 to make pull rod 54 push up and connect screw 26, rotatory handle 51 makes four pull rods 54 syntropy rotate, because four unlocking plate 25 receive the moment of torsion of equidirectional, lock each other between four unlocking plate 25, can't realize rotatoryly, be connected the back with connecting screw 26 with pull rod 54, outer pull handle 51 can be ejecting four unblock bolts 15 simultaneously, thereby get rid of unblock lock nut 18, take out locking bolt 29, rethread conventional four corners spanner open the dismouting head 12 can.

The pull rod 54 can also be pulled out by rotating the collar 55 to increase the distance between the locking cap 18 and the handle 51.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims

1. The anti-theft hoisting motor comprises a cover (a) and a machine body (b), and is characterized in that the cover (a) is provided with a plurality of dismounting holes (13), the cover (a) is provided with a plurality of connecting holes with internal threads, each connecting hole is connected with the dismounting hole (13) through a locking device, the locking device comprises a connecting screw rod (11) matched with the connecting holes, the outer end part of the connecting screw rod (11) is provided with a dismounting head (12), the dismounting head (12) is internally provided with a dismounting hole (13) with an outer end opening, the cross section of the dismounting hole (13) is square, four inner walls of the dismounting hole (13) are respectively provided with a dismounting hole (14), a T-shaped unlocking bolt (15) is inserted in the dismounting hole (14), the inner end of the dismounting bolt (15) is provided with an unlocking inclined plane (16) which forms an acute angle with the axis of the connecting screw rod (11), the outer end of the dismounting hole (13) is provided with a positioning part (17), the aperture of the positioning part (17) is larger than that the dismounting hole (13), the inner end of the dismounting hole (18) is provided with a locking cap (19), and the positioning head (18) is inserted in a locking cap, and the four locking cap (18) is provided with a corresponding locking cap, and the positioning boss (18), an anti-disassembly baffle (21) is sleeved on the connecting screw rod (11), a check ring (22) which shields the opening of the locking cap (18) and is positioned on the outer side of the locking cap (18) is arranged on the anti-disassembly baffle (21), and a gap with the thickness larger than that of the positioning protrusion (19) is formed between the check ring (22) and the outer wall of the locking cap (18);

four positioning holes (23) are formed in the bottom wall of the dismounting hole (13), positioning rods (24) are inserted into the positioning holes (23), an unlocking plate (25) is fixedly arranged at the outer end parts of the positioning rods (24), the unlocking plate (25) is circular, external threads are formed in the outer peripheral surface of the unlocking plate (25), and the four unlocking plates (25) are sequentially in threaded engagement; the four unlocking plates (25) can respectively push the four unlocking bolts (15) to move towards the outer ends of the unlocking holes (14);

the inner wall of the retainer ring (22) is provided with an electromagnetic valve corresponding to one unlocking bolt (15), the electromagnetic valve is provided with a raw magnetic coil (L), the inner wall of the retainer ring (22) is provided with a first contact switch (S1), a second contact switch (S2), a third contact switch (S3) and a fourth contact switch (S4), the first contact switch (S1), the second contact switch (S2), the third contact switch (S3) and the fourth contact switch (S4) can be in contact with the outer wall of the unlocking cap and triggered when the unlocking bolt (15) is ejected out, the first contact switch (S1) and the second contact switch (S2) correspond to two opposite unlocking bolts (15), and the third contact switch (S3) and the fourth contact switch (S4) correspond to the other two opposite unlocking bolts (15); the anti-theft hoisting motor further comprises a first control power supply (E1) and a second control power supply (E2), the first contact switch (S1) is connected with the second contact switch (S2) in parallel, the third contact switch (S3) is connected with the fourth contact switch (S4) in parallel, the first control power supply (E1), the magnetic generating coil (L), the first contact switch (S1) and the second contact switch (S2) are connected in series, and the second control power supply (E2), the magnetic generating coil (L), the third contact switch (S3) and the fourth contact switch (S4) are connected in series;

a connecting screw (11) for fixing cover (a) and organism (b), under the parcel of locking cap (18), can't be opened easily, and locking cap (18) are fixed on dismouting head (12) of connecting screw (11 outer end) through the cooperation of location arch (19) and location portion (17), want to open connecting screw (11), must open locking cap (18), realize in dismouting hole (13) in dismouting head (12) through the four corners spanner insertion, it must be ejecting with four unblock bolt (15) through the specialized tool who inserts in dismouting hole (13) to open locking cap (18).

2. Anti-theft lifting motor according to claim 1, characterized in that the unlocking plate (25) is provided with a connection screw hole (26), and the connection screw hole (26) is concentric with the unlocking plate (25).

3. Anti-theft lifting motor according to claim 2, characterized in that each inner wall of the dismounting hole (13) is provided with a stop strip (27), the stop strips (27) are positioned outside the unlocking bolt (15) in the dismounting hole (13); the outer side wall of the dismounting head (12) is a curved surface, and the outline of the locking cap (18) is matched with the dismounting head (12).

4. Anti-theft lifting motor according to claim 3, characterized in that the cover (a) is provided with a locking hole (28) which is communicated with the dismounting hole (13), and a locking bolt (29) is connected in the locking hole (28) in a threaded manner.

5. Anti-theft lifting motor according to claim 4, characterized in that the outer end face of the locking cap (18) is provided with four avoiding holes (3) which are opposite to the connecting screw holes (26).

6. The anti-theft lifting motor according to claim 5, wherein a positioning block (41) made of graphite material is arranged at the bottom of the positioning hole (23), and a positioning notch (42) matched with the positioning block (41) is formed in the positioning rod (24).

7. The anti-theft lifting motor according to claim 6, further comprising a handle (51), wherein the handle (51) is a hollow structure, a master gear (52) is fixedly arranged in the handle (51), four slave gears (53) corresponding to the avoidance holes (3) in a one-to-one manner are further arranged in the handle (51), the master gear (52) is simultaneously meshed with the four slave gears (53), a pull rod (54) is respectively and fixedly arranged on each slave gear (53), and the outer end of each pull rod (54) is provided with an external thread.

8. Anti-theft lifting motor according to claim 7, characterized in that it further comprises a collar (55) with an internal thread, said pull rod (54) having an external thread matching the internal thread of said collar (55).