CN107147240B - An anti-theft hoisting motor and its unlocking device - Google Patents

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

An anti-theft hoisting motor and its unlocking device

technical field

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

Background technique

As the core component of lifting equipment, the lifting motor is often placed outdoors. The shell of the lifting motor is not the target of criminals because of its bulkiness, solid connection with other machine bases, and low price. The inner core of the motor, Because of the high price, it has become the focus of anti-theft protection.

Contents of the invention

The purpose of the present invention is to provide an anti-theft lifting motor for the above-mentioned problems existing in the prior art. The technical problem to be solved by the present invention is how to prevent the The motor core was stolen.

The purpose of the present invention can be achieved through the following technical solutions: an anti-theft lifting motor, the lifting motor includes a machine cover and a machine body, and it is characterized in that a number of installation holes are opened on the end cover, and a number of mounting holes are opened on the cover. There are several connecting holes with internal threads, and each connecting hole is connected to the mounting hole through a locking device, and the locking device includes a connecting screw adapted to the connecting hole, and the outer surface of the connecting screw There is a disassembly head at the end, and there is a disassembly hole with an outer end opening inside the disassembly head. A T-shaped unlocking pin is inserted into the unlocking hole, and the inner end of the unlocking pin has an unlocking slope at an acute angle with the axis of the connecting screw, and the outer end of the disassembly hole has a positioning part, so The aperture of the positioning part is larger than the aperture of the dismounting hole, and a locking cap is set on the dismounting head, and the inner wall of the locking cap has four positioning protrusions corresponding to the positioning part one by one. The positioning protrusion is inserted in the corresponding positioning part, and an anti-dismantling baffle is sleeved on the connecting screw, and the anti-dismantling baffle has a retaining ring that blocks the opening of the locking cap and is located outside the locking cap , There is a gap greater than the thickness of the positioning protrusion between the retaining ring and the outer wall of the locking cap.

The connecting screw used to fix the machine cover and the body cannot be easily opened under the wrapping of the locking cap, and the locking cap is fixed on the disassembly head at the outer end of the connecting screw through the cooperation of the positioning protrusion and the positioning part. If you want to open the connecting screw, you must open the lock cap, and insert the four-corner wrench into the disassembly hole in the disassembly head. To open the lock cap, you must push out the four unlocking pins with a special tool inserted into the disassembly hole. .

In the above-mentioned anti-theft lifting motor, four positioning holes are opened on the bottom wall of the disassembly hole, and a positioning rod is respectively inserted in the positioning hole, and the outer end of the positioning rod is fixedly arranged There is an unlocking plate, the unlocking plate is circular, and the outer peripheral surface of the unlocking plate has external threads, and the four unlocking plates are threaded in turn; the four unlocking plates can respectively push the four unlocking pins to the unlocking hole the outer end moves.

In the aforementioned anti-theft lifting motor, a connecting screw hole is opened on the unlocking plate, and the connecting screw hole is concentric with the unlocking plate.

In the above-mentioned anti-theft lifting motor, each inner wall of the installation hole is provided with a bar, and the bar is located outside the unlocking pin in the installation hole.

In the aforementioned anti-theft lifting motor, the outer wall of the assembly and disassembly head is curved, and the outer profile of the locking cap is adapted to the assembly and disassembly head.

In the aforementioned anti-theft lifting motor, the end cover is provided with a locking hole passing through the mounting hole, and the locking hole is internally threaded with a locking bolt. The locking bolt prevents the connecting screw from loosening.

In the above-mentioned anti-theft lifting motor, four escape holes are provided on the outer end surface of the locking cap, which are directly opposite to the connecting screw holes one by one.

In the aforementioned anti-theft lifting motor, preferably, a solenoid valve corresponding to one of the unlocking pins is provided on the inner wall of the retaining ring, the solenoid valve has a magnetic coil, and the inner wall of the retaining ring Contact switch 1, contact switch 2, contact switch 3 and contact switch 4 are arranged on the top, and the contact switch 1, contact switch 2, contact switch 3 and contact switch 4 can all be in contact with the outer wall of the unlocking cap when the unlocking bolt is ejected. And be triggered, the contact switch one and the contact switch two are corresponding to two unlocking pins facing each other, the contact switch three and the contact switch four are corresponding to the other two facing unlocking pins; the anti-theft lifting motor also It includes control power supply 1 and control power supply 2, the contact switch 1 and contact switch 2 are connected in parallel, the contact switch 3 and contact switch 4 are connected in parallel, the control power supply 1, the magnetic coil, contact switch 1 and contact switch 2 are connected in series, The second control power supply, the magnetic coil, the third contact switch and the fourth contact switch are connected in series.

In the aforementioned anti-theft lifting motor, preferably, a positioning block made of graphite is provided at the bottom of the positioning hole, and a positioning notch matching the positioning block is provided on the positioning rod.

Contact switch 1 and or contact switch 2 are triggered, the magnetic coil is connected, the solenoid valve pops up, resists the locking cap, and the unlocking pin corresponding to the solenoid valve is not allowed to pop out, that is, the locking cap cannot be removed; contact switch 3 and or contact switch Four triggers, the magnetic coil is connected, the solenoid valve pops up, and the locking cap is held against, and the unlocking pin corresponding to the solenoid valve is not allowed to pop out, that is, the locking cap cannot be removed; only when contact switch 1 or contact switch 2 and contact switch 3 or The contact switch is triggered in twos and fours, and the magnetic coil can be disconnected.

Since contact switch 1 and contact switch 2 correspond to the two facing unlocking pins, and contact switch 3 and contact switch 4 correspond to the other two facing unlocking pins, based on this, the terminal of the lifting motor is opened in the following way cover, it will not be possible to achieve:

Insert a single screw and try to open the locking cap: a single screw is inserted into the connecting screw hole. Due to the positioning block and positioning protrusion, it is difficult to connect the screw with the connecting screw hole. If the screw can be inserted into the connecting screw hole under strong pressure, Even if there is no sliding effect of the positioning block and the positioning protrusion, it will inevitably cause the unlocking plate to rotate. During the rotating process of the unlocking plate, under the action of the screw transmission between each other, the two facing unlocking plates and the other two are aimed at unlocking. The plates move in two different directions of the positioning rod respectively, wherein the two unlocking plates moving toward the outer end of the positioning hole reach the position in contact with the unlocking pin in advance, and push the unlocking pin out, and the two unlocking pins are completely pushed out. When going out, the unlocking plate is restricted by the retaining bar and cannot continue to move outside. Even if a thief pulls the screw rod and tries to push out all the unlocking bolts, it cannot be realized.

Two screw rods are inserted diagonally at the same time, trying to open the locking cap: the effect is the same as that of one screw rod, and it is impossible to push out all the unlocking pins at the same time.

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

Only when the four unlocking boards are connected synchronously through a special tool can the unlocking be achieved.

In addition, the anti-theft lifting motor is also equipped with an electronically controlled locking device. When the two adjacent unlocking plates cannot push the unlocking pin at the same time, the solenoid valve will be triggered, thereby blocking the gap for removing the locking cap. Only synchronous contact or full contact is available.

An unlocking device for an anti-theft hoisting motor, characterized in that the unlocking device includes a handle, the handle is a hollow structure, a main gear is fixed inside the handle, and there is also a hole in the handle that is connected to an escape hole. One corresponding four slave gears, the master gear meshes with four slave gears at the same time, a pull rod is respectively fixedly arranged on the slave gears, and the outer end of the pull rod has an external thread; the outer end of the pull rod can be connected with the The connecting screw holes are threaded; the pull rods can be inserted into the corresponding escape holes.

In the aforementioned unlocking device for a hoisting motor, the unlocking device further includes a collar with an internal thread, and the pull rod has an external thread matching the internal thread of the collar.

The opening method is as follows: Insert the four pull rods into the corresponding avoidance holes respectively, push the pull rods into the connecting screw holes, rotate the handle, and make the four pull rods rotate in the same direction. Since the four unlocking plates are subjected to torque in the same direction, the four unlocking plates will They are locked to each other and cannot be rotated. After connecting the pull rod to the connecting screw hole, pull the handle to push out the four unlocking pins at the same time, thereby removing the unlocking cap, taking out the locking bolt, and then using a conventional square wrench Just open the disassembly head.

The pull rod can also be pulled out by turning the collar to increase the distance between the locking cap and the handle.

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

1. The anti-theft lifting motor can realize the locking between the motor body and the machine cover through a purely mechanical structure to prevent theft; the structure is reliable and the manufacturing cost is low.

2. Through a synchronous circuit, the difficulty factor of unlocking can be enhanced.

3. Through the unlocking device with simple structure and convenient operation, easy opening between the body of the motor and the machine cover can be realized.

Description of drawings

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

Fig. 2 is an enlarged view of part C in Fig. 1 .

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

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

Fig. 5 is a schematic diagram of the assembly structure of the unlocking device and the anti-theft device.

FIG. 6 is a cross-sectional view along direction A in FIG. 5 .

FIG. 7 is a cross-sectional view along the direction B in FIG. 5 .

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

In the figure, a, machine cover; b, body; 11, connecting screw; 12, disassembly head; 13, disassembly hole; 14, unlocking hole; 15, unlocking pin; 16, unlocking slope; 17, positioning part; 18 , locking cap; 19, positioning protrusion; 21, anti-demolition baffle; 22, retaining ring; 23, positioning hole; 24, positioning rod; 25, unlocking plate; 26, connecting screw hole; 27, retaining bar; 28 , locking hole; 29, locking bolt; 3, escape hole; 41, positioning block; 42, positioning notch; 51, handle; 52, main gear; 53, slave gear; 54, pull rod; 55, collar; L, magnetic coil; S1, contact switch one; S2, contact switch two; S3, contact switch three; S4, contact switch four; E1, control power supply one; E2, control power supply two.

Detailed ways

The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

As shown in Fig. 1, Fig. 2, Fig. 3, Fig. 5 and Fig. 7, an anti-theft hoisting motor, the hoisting motor includes a machine cover a and a body b, and the end cover is provided with several dismounting holes 13, the machine cover There are several connecting holes with internal threads on a, and each connecting hole is connected to the dismounting hole 13 through a locking device. The locking device includes a connecting screw 11 adapted to the connecting hole, and the connecting screw 11 There is a dismounting head 12 at the outer end, and there is a dismounting hole 13 with an outer end opening inside the dismounting head 12. The cross section of the dismounting hole 13 is square, and an unlocking hole 14 is respectively provided on the four inner walls of the dismounting hole 13. , the unlocking hole 14 is inserted with a T-shaped unlocking pin 15, the inner end of the unlocking pin 15 has an unlocking slope 16 at an acute angle with the axis of the connecting screw 11, and the outer end of the dismounting hole 13 has a positioning part 17. The aperture of the positioning part 17 is larger than the aperture of the dismounting hole 13. A locking cap 18 is set on the dismounting head 12. The inner wall of the locking cap 18 has four positioning protrusions corresponding to the positioning part 17 one by one. 19. The positioning protrusion 19 is inserted into the corresponding positioning part 17, and the connecting screw 11 is covered with an anti-dismantle baffle 21, which has a function on the anti-dismantlement baffle 21 that blocks the opening of the locking cap 18 and is located on the locking cap 18. The outer retaining ring 22 has a gap greater than the thickness of the positioning protrusion 19 between the retaining ring 22 and the outer wall of the locking cap 18 .

The connecting screw 11 used to fix the machine cover a and the body b cannot be easily opened under the wrapping of the locking cap 18, and the locking cap 18 is fixed on the connecting screw through the cooperation of the positioning protrusion 19 and the positioning part 17 On the dismounting head 12 at the outer end of 11, if you want to open the connecting screw 11, you must open the locking cap 18, and insert a square wrench into the dismounting hole 13 in the dismounting head 12 to achieve it. To open the locking cap 18, you must insert and disassemble The special tool in the hole 13 pushes out four unlocking bolts 15.

The bottom wall of the dismounting hole 13 is provided with four positioning holes 23, and a positioning rod 24 is respectively inserted in the positioning holes 23, and the outer end of the positioning rod 24 is fixedly provided with an unlocking plate 25, and the unlocking plate 25 is circular and can be unlocked. There are external threads on the outer peripheral surface of the plate 25, and the four unlocking plates 25 are threaded in turn; the four unlocking plates 25 can respectively push the four unlocking pins 15 to move to the outer ends of the unlocking holes 14; the unlocking plates 25 are provided with connecting screw holes 26, the connecting screw hole 26 is concentric with the unlocking plate 25; each inner wall of the dismounting hole 13 is provided with a retaining bar 27, and the retaining bar 27 is located outside the unlocking pin 15 in the dismounting hole 13.

The outer wall of the dismounting head 12 is a curved surface, and the outer profile of the locking cap 18 is adapted to the dismounting head 12; the end cap is provided with a locking hole 28 connected with the dismounting hole 13, and the locking hole 28 is internally threaded. Locking bolt 29. The locking bolt 29 can prevent the connecting screw 11 from loosening; the outer end surface of the locking cap 18 is provided with four avoidance holes 3 facing the connecting screw holes 26 one by one.

Preferably, a solenoid valve corresponding to one of the unlocking pins 15 is provided on the inner wall of the retaining ring 22, the solenoid valve has a magnetic coil L, and the inner wall of the retaining ring 22 is provided with a contact switch S1, a contact switch S2, a contact Switch three S3 and contact switch four S4, contact switch one S1, contact switch two S2, contact switch three S3 and contact switch four S4 can all contact and be triggered with the outer wall of unlocking cap when unlocking pin 15 ejects, contact switch one S1 and contact switch two S2 correspond to two of them facing unlocking pins 15, contact switch three S3 and contact switch four S4 correspond to the other two facing unlocking pins 15; the anti-theft lifting motor also includes control power supply one E1 And control power supply 2 E2, contact switch 1 S1 and contact switch 2 S2 in parallel, contact switch 3 S3 and contact switch 4 S4 in parallel, control power supply 1 E1, magnetic coil L, contact switch 1 S1 and contact switch 2 S2 in series, control The second power supply E2, the magnetic coil L, the third contact switch S3 and the fourth contact switch S4 are connected in series.

Preferably, the bottom of the positioning hole 23 is provided with a positioning block 41 made of graphite material, and the positioning rod 24 is provided with a positioning notch 42 matching with the positioning block 41 .

As shown in Fig. 1 and Fig. 8, contact switch 1 S1 and/or contact switch 2 S2 are triggered, the magnetizing coil L is turned on, the solenoid valve pops up, resists the locking cap 18, and the unlocking pin 15 corresponding to the solenoid valve is not allowed to pop up, That is, the locking cap 18 cannot be removed; the contact switch 3 S3 and or the contact switch 4 S4 are triggered, the magnetic coil L is connected, the solenoid valve pops up, and the locking cap 18 is held against the locking cap 18, so that the unlocking pin 15 corresponding to the solenoid valve is not allowed to pop up, that is The locking cap 18 cannot be removed; only when contact switch one S1 or contact switch two S2 and contact switch three S3 or contact switch four S4 are triggered in pairs, the magnetic coil L can be disconnected.

Since contact switch 1 S1 and contact switch 2 S2 correspond to the two unlocking pins 15 facing each other, and contact switch 3 S3 and contact switch 4 S4 correspond to the other two facing unlocking pins 15, based on this, it can be opened in the following way The end cover of the lifting motor will not be able to achieve:

Insert a single screw and try to open the lock cap 18: a single screw is inserted into the connecting screw hole 26. Due to the effect of the positioning block 41 and the positioning protrusion 19, the screw is difficult to be connected with the connecting screw 26. If under strong pressure, the screw can Insert the connection screw hole 26, even if there is no sliding effect of the positioning block 41 and the positioning protrusion 19, it will inevitably cause the unlocking plate 25 to rotate. One unlocking plate 25 and the other two targeted unlocking plates 25 move in two different directions of the positioning rod 24 respectively, wherein the two unlocking plates 25 moving toward the outer end of the positioning hole 23 reach the position in contact with the unlocking bolt 15 in advance , and push the unlocking pin 15 to be ejected. When the two unlocking pins 15 are fully ejected, the unlocking plate 25 is restricted by the retaining bar 27 and cannot continue to move outside. Even if the thief pulls the screw rod, all the unlocking pins 15 All ejected, also can not be realized.

Two screw rods are inserted diagonally at the same time, trying to open the locking cap 18: its effect communicates with a screw rod, and it is impossible to eject all unlocking latches 15 simultaneously.

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

Only after the four unlocking plates 25 are synchronously connected by a special tool, the purpose of unlocking can be achieved.

In addition, the anti-theft lifting motor is also provided with an electronically controlled locking device. When the two adjacent unlocking plates 25 cannot push the unlocking pin 15 at the same time, the solenoid valve will be triggered, thereby removing the locking cap 18. For gap occlusion, only synchronous contact or full contact is available.

As shown in Figure 1, Figure 2, Figure 4, Figure 5 and Figure 6, an unlocking device for an anti-theft lifting motor, the unlocking device includes a handle 51, the handle 51 is a hollow structure, and a main gear 52 is fixed inside the handle 51 , the handle 51 is also provided with four slave gears 53 corresponding to the avoidance hole 3 one by one, the master gear 52 meshes with the four slave gears 53 at the same time, and a pull rod 54 is fixedly arranged on the slave gear 53 respectively, and the outer end of the pull rod 54 It has an external thread; the outer end of the pull rod 54 can be threadedly connected with the connecting screw hole 26 ; the pull rod 54 can be inserted into the corresponding escape hole 3 .

The unlocking device also includes a collar 55 with an internal thread, and the pull rod 54 has an external thread matching the internal thread of the collar 55 .

The opening method is as follows: Insert the four pull rods 54 into the corresponding avoidance holes 3 respectively, push the pull rods 54 into the connecting screw holes 26, and rotate the handle 51 to make the four pull rods 54 rotate in the same direction. torque, the four unlocking plates 25 are locked to each other and cannot be rotated. After the pull rod 54 is connected to the connecting screw hole 26, the four unlocking pins 15 can be simultaneously pushed out by pulling the handle 51, thereby removing the locking cap. 18. Take out the locking bolt 29, and then open the disassembly head 12 with a conventional square wrench.

It is also possible to increase the distance between the locking cap 18 and the handle 51 by rotating the collar 55, so that the pull rod 54 can be pulled out.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the present invention or go beyond the definition of the appended claims range.

Claims (8)

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).

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