CN112572277B

CN112572277B - Continuous locking force device

Info

Publication number: CN112572277B
Application number: CN202011475703.1A
Authority: CN
Inventors: 何一陆; 周永娟; 王丹; 何子衡; 李照; 谢立中
Original assignee: China Ordnance Industry Group Jiangshan Heavy Industry Research Institute Co ltd
Current assignee: China Ordnance Industry Group Jiangshan Heavy Industry Research Institute Co ltd
Priority date: 2020-12-14
Filing date: 2020-12-14
Publication date: 2022-07-26
Anticipated expiration: 2040-12-14
Also published as: CN112572277A

Abstract

The utility model provides a last locking force device, including the worm-gear case, the worm wheel is arranged in the worm-gear case, the worm wheel overlaps outside the worm-gear axle that is located the worm-gear case, the worm-gear axle both ends are stretched out on the worm-gear case, a worm wheel axle tip that is located the worm-gear case is equipped with the twist lock, the twist lock have with by locking body matched with locking surface, the worm both ends are stretched out on the worm-gear case, the worm wheel includes the worm wheel body, the torsional spring, the restriction round pin, the worm wheel body is by main worm wheel, vice worm wheel constitutes the combination solid of revolution structure of taking the cavity, restriction round pin axis is parallel with the worm-gear axle, the restriction round pin lower extreme is fixed in on the main worm wheel, during the long circle arc hole on the vice worm wheel is arranged in to restriction round pin upper end, the torsional spring that is located cavity G has torque arm one, torque arm two, torque arm cartridge of torsional spring is on vice worm wheel, torque arm two cartridges on main worm wheel. The invention does not increase the space of the locking mechanism, utilizes the torque generated by the torsion spring to act on the locked box body, eliminates the vibration generated in the transportation process of the locked box body and protects the locking mechanism from being damaged.

Description

Continuous locking force device

Technical Field

The invention belongs to the technical field of box body locking, and relates to a device capable of providing continuous locking force for a locked box body under the condition of not increasing the space size of a mechanism.

Background

In the transportation process, particularly in complex terrains in mountainous and hilly environments, because vibration is generated due to uneven roads, on one hand, certain machining errors exist in the machining structure of the locking mechanism, certain gaps exist among all components of the locking mechanism in the locking state, vibration can be generated in the transportation process, and the vibration has certain impact on the locking mechanism and damages the locking mechanism, so that the service life of the locking mechanism is influenced; on the other hand, the locking mechanism and the locked body are also locked by a gap, so that the locking mechanism is easy to damage when used in a vibration environment. How to design a locking device has solved the problem of being locked the body vibration, has avoided the damage of locking mechanism to become the problem that awaits a urgent solution.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, and provides a continuous locking force device which is simple in structure, free of increasing the space of a locking mechanism, obvious in effect of preventing a locked box body from vibrating and reliable in locking.

The technical scheme of the invention is as follows: the worm gear box comprises a worm gear box body, a worm gear is arranged in the worm gear box body, the worm gear is sleeved outside a worm gear shaft in the worm gear box body, two ends of the worm gear shaft extend out of the worm gear box body, a worm gear shaft end portion positioned outside the worm gear box body is provided with a twist lock, the twist lock is provided with a locking surface matched with a locked body, two ends of a worm extend out of the worm gear box body, the worm gear shaft is perpendicular to the worm, the worm gear comprises a worm gear body, a torsion spring and a limiting pin, the worm gear body is a combined revolving body structure with a cavity formed by a main worm gear and an auxiliary worm gear, the axis of the limiting pin is parallel to the worm gear shaft, the lower end of the limiting pin is fixed on the main worm gear, the upper end of the limiting pin is arranged in a long circular arc hole in the auxiliary worm gear, the torsion spring positioned in the cavity G is provided with a first torsion arm and a second torsion arm, the first torsion arm of the torsion spring is inserted in the auxiliary worm gear, and the second torsion arm of the torsion arm is inserted in the main worm gear.

The upper end of the limiting pin is provided with an active quantity with an angle a at the long circular arc hole of the auxiliary worm wheel; in the first initial stage of the locking movement, the driving force of the worm driven by the servo motor is transmitted to the worm wheel shaft, the driving force drives the rotary lock on the worm wheel shaft to rotate to the locking surface and the locked body to be matched and locked, the torsion angle of the two torsion arms of the torsion spring is equal to zero, and the torsion spring is in an undeformed state; in the second continuous locking stage of the locking motion, when the worm drives the main worm wheel to continue rotating so that the upper end of the limiting pin moves to be abutted against the hole wall of the long circular arc-shaped hole in the auxiliary worm wheel, the torsion angle of the two torsion arms of the torsion spring is equal to a, and the rotating force generated by the torsion spring is transmitted to the rotating lock to form continuous locking force for locking the locked body.

When the worm needs to be disengaged, the worm rotates reversely to drive the torsion spring of the main worm wheel to release torque, the auxiliary worm wheel drives the rotary lock to move reversely, and the locking surface of the rotary lock is withdrawn from contact with the locked body.

The number of the limiting pins is at least two, and the main worm wheel is provided with at least two mounting holes which are detachably and fixedly connected with the lower ends of the limiting pins.

The auxiliary worm wheel is an inner sleeve, the upper end of the inner sleeve is provided with a circle of flange, and the flange is provided with a long circular arc-shaped hole; the main worm wheel is an outer sleeve, the inner ring of the outer sleeve is sleeved at the lower end of the inner sleeve, the outer ring of the outer sleeve is provided with a cylindrical ring extending along the axial direction, the upper end of the cylindrical ring is provided with a circle of seam allowance matched with the lower end of the flange at the upper end of the inner sleeve, and the outer cylindrical surface of the cylindrical ring is a tooth surface meshed with the worm; a cavity G is formed between the inner cylindrical surface of the cylindrical ring and the outer wall of the inner sleeve; and the mounting hole parallel to the axis of the main worm wheel is arranged on the cylindrical ring.

The cylindrical spiral part of the torsion spring is sleeved outside the inner sleeve.

A limiting plate is further arranged below the main worm wheel, two signal lugs are arranged on the limiting plate, and a proximity switch which works in cooperation with the signal lugs is arranged in the worm wheel box.

The limiting plate is provided with a long waist-shaped hole, and the limiting plate is arranged below the main worm wheel through a limiting plate screw inserted in the long waist-shaped hole.

The locking surface is positioned on the lower end surface of the rotary lock, and the locking surface is matched with the spiral surface on the locked body.

The rotary lock is a mushroom head rotary lock.

When the mushroom head twist lock is used for fixing the box body, the rotation angle of the mushroom head twist lock is determined, and the related parts of the locked box body and the mushroom head twist lock have certain processing errors, so that a certain gap exists in the locked box body in a locking state, and vibration can be generated in the transportation process. The vibration has certain impact on the locking mechanism and damages the locking mechanism, thereby influencing the service life of the locking mechanism. The invention can eliminate the gap of the locked box body and can not generate vibration in the transportation process. The locking mechanism is protected, and the service life of the locking mechanism is prolonged. The invention utilizes the torque generated by the torsion spring to act on the locked box body, eliminates the vibration generated in the transportation process of the locked box body and protects the locking mechanism from being damaged. The original locking mechanism is often damaged due to the vibration generated in the transportation process of the locked box body, and by adopting the structure, the cost is not increased much, the problem of the vibration of the locked body is solved, and the damage of the locking mechanism is avoided.

Drawings

FIG. 1 is a top view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is a schematic structural view of the mushroom head twist lock;

FIG. 4 is a schematic view of the assembly of the primary and secondary worm gears;

FIG. 5 is a cross-sectional view of FIG. 4;

fig. 6 is a schematic diagram of a stopper plate.

1-worm, 2-main worm wheel, 3-auxiliary worm wheel, 4-mushroom head rotary lock, 5-torsion spring, 6-limit pin, 7-limit plate, 8-proximity switch support, 9-proximity switch, 10-locked body, 11-limit plate screw, 101-worm end part and 701-signal lug.

Detailed Description

In fig. 1-6, a worm end 101 is connected to a servo motor, torque is input by the servo motor, the worm wheel is divided into a main worm wheel 2 and an auxiliary worm wheel 3, the worm 1 is meshed with the main worm wheel 2, the main worm wheel 2 and the auxiliary worm wheel 3 are connected into a whole by a torsion spring 5 and a limiting pin 6, the limiting pin 6 is fixed with the main worm wheel 2 through a thread, a long arc hole 31 is designed on the auxiliary worm wheel 3, and the limiting pin 6 has an activity with an angle a =12 ° in the long arc hole 31 of the auxiliary worm wheel 3, wherein the activity is a deformation angle of the torsion spring 5, which generates torque. The lower end of the limiting pin 6 is fixed in the mounting hole 21 on the main worm wheel 2, the upper end of the limiting pin 6 is movably arranged in the long circular arc-shaped hole 31 on the auxiliary worm wheel 3, the torsion spring 5 positioned in the cavity G is provided with a first torsion arm 51 and a second torsion arm 52, the first torsion arm 51 of the torsion spring 5 is inserted on the auxiliary worm wheel 3, and the second torsion arm 52 of the torsion spring 5 is inserted on the main worm wheel 2. The lower end of the mounting hole 21 is provided with a threaded section which is matched with the limiting pin 6.

This mechanism design has to rotate and targets in place the stop device, and limiting plate 7 has two signal ears, installs on main worm wheel 2 and rotates along with main worm wheel 2 with limiting plate screw 11, and when the signal ear of left side below was close with proximity switch 9, electrical control system confirms that mushroom head twist lock 4 is in the position of breaking away, and when the signal ear of upper right side was close with proximity switch 10, electrical control system confirmed that mushroom head twist lock 4 is in the locking position. The actuating motor of the mechanism is a servo motor, and the unlocking position and the locking position are controlled by a signal lug 701 of the limiting plate 7 to excite the proximity switch 9 to send signals.

The working principle is as follows: at the initial stage of movement, the servo motor drives the worm 1 to rotate, the worm 1 is meshed with the main worm wheel 2 and drives the main worm wheel 2 to rotate, the auxiliary worm wheel 3 and the mushroom head rotary lock 4 rotate together under the action of the torsion spring 5, but the torsion spring 5 is not deformed, when the locking surface 401 of the mushroom head rotary lock 4 is in contact with the locked working surface of the locked body 10 and is locked by the locked body 10, the mushroom head rotary lock 4 and the auxiliary worm wheel 3 cannot continuously rotate, the worm 1 drives the main worm wheel 2 to continuously rotate to compress the torsion spring 5, when the upper end of the limiting pin 6 moves to abut against the hole wall of the long circular arc-shaped hole 31 in the auxiliary worm wheel 3, the torsion spring 5 twists by 12 degrees, and the torque generated by 12 degrees is the torque applied to the mushroom head rotary lock 4 and the locked body 10, namely the continuous locking.

So that the locked body 10 does not vibrate in the moving process, and the normal work of the locking mechanism is ensured.

Since the torsion spring 5 provides a continuous locking force, a gap between the locking mechanism and the locked body 10 is eliminated, and the locked body 10 does not vibrate during transportation. The locking mechanism is protected, and the service life of the locking mechanism is prolonged.

Claims

1. A continuous locking force device is characterized in that: comprises a worm gear box, a worm gear is arranged in the worm gear box, the worm gear is sleeved outside a worm gear shaft arranged in the worm gear box, two ends of the worm gear shaft extend out of the worm gear box, a twist lock (4) is arranged at the end part of a worm gear shaft arranged outside the worm gear box, the twist lock (4) is provided with a locking surface (401) matched with a locked body (10), two ends of a worm (1) extend out of the worm gear box, the worm gear shaft is vertical to the worm (1), the worm gear comprises a worm gear body, a torsion spring (5) and a limiting pin (6), the worm gear body is a combined revolving body structure with a cavity formed by a main worm gear (2) and an auxiliary worm gear (3), the axis of the limiting pin (6) is parallel to the worm gear shaft, the lower end of the limiting pin (6) is fixed on the main worm gear (2), the upper end of the limiting pin (6) is arranged in a long circular arc-shaped hole (31) on the auxiliary worm gear (3), the torsion spring (5) arranged in the cavity G is provided with a first torsion arm (51) and a second torsion arm (52), a first torsion arm (51) of the torsion spring (5) is inserted on the auxiliary worm wheel (3), and a second torsion arm (52) of the torsion spring (5) is inserted on the main worm wheel (2); the upper end of the limiting pin (6) has an activity with an angle a at the long circular arc hole (31) of the auxiliary worm wheel (3);

in the first initial stage of the locking movement, the driving force of the worm (1) driven by the servo motor to rotate is transmitted to the worm wheel shaft, the driving force drives the rotary lock (4) on the worm wheel shaft to rotate to the locking surface (401) and the locked body (10) to be matched and locked, and the torsion angle of two torsion arms of the torsion spring (5) is equal to zero; in the second continuous locking stage of the locking motion, when the worm (1) drives the main worm wheel (2) to continuously rotate so that the upper end of the limiting pin (6) moves to abut against the hole wall of the long circular arc-shaped hole (31) in the auxiliary worm wheel (3), the torsion angle of two torsion arms of the torsion spring (5) is equal to a, and the rotary force generated by the torsion spring (5) is transmitted to the rotary lock (4) to form continuous locking force for locking the locked body (10).

2. The continuous locking force device of claim 1, wherein: the number of the limiting pins (6) is at least two, and the main worm wheel (2) is provided with at least two mounting holes (21) which are detachably and fixedly connected with the lower ends of the limiting pins (6).

3. The continuous locking force device of claim 2, wherein: the auxiliary worm wheel (3) is an inner sleeve, the upper end of the inner sleeve is provided with a circle of flange, and the flange is provided with a long circular arc-shaped hole (31);

the main worm wheel (2) is an outer sleeve, the inner ring of the outer sleeve is sleeved at the lower end of the inner sleeve, the outer ring of the outer sleeve is provided with a cylindrical ring extending along the axial direction, the upper end of the cylindrical ring is provided with a circle of seam allowance matched with the lower end of the flange at the upper end of the inner sleeve, and the outer cylindrical surface of the cylindrical ring is a tooth surface meshed with the worm (1); a cavity G is formed between the inner cylindrical surface of the cylindrical ring and the outer wall of the inner sleeve; and a mounting hole (21) parallel to the axis of the main worm wheel (2) is arranged on the cylindrical ring.

4. The continuous locking force device of claim 3, wherein: the cylindrical spiral part of the torsion spring (5) is sleeved outside the inner sleeve.

5. The continuous locking force device of claim 1, wherein: a limiting plate (7) is further arranged below the main worm wheel (2), two signal lugs (701) are arranged on the limiting plate (7), and a proximity switch (9) which works in cooperation with the signal lugs (701) is arranged in the worm wheel box.

6. The continuous locking force device of claim 5, wherein: the limiting plate (7) is provided with a long waist-shaped hole, and the limiting plate (7) is arranged below the main worm wheel (2) through a limiting plate screw (11) inserted in the long waist-shaped hole.

7. A continuous locking force device as claimed in claim 1 or claim 2 wherein: the locking surface (401) is located on the lower end face of the rotary lock (4), and the locking surface (401) is matched with a spiral surface on the locked body (10).

8. The continuous locking force device of claim 7, wherein: the rotary lock (4) is a mushroom head rotary lock.