CN213060118U

CN213060118U - Screw rod lifter with overload protection function

Info

Publication number: CN213060118U
Application number: CN202021575093.8U
Authority: CN
Inventors: 俞建强
Original assignee: Hangzhou Chenghua Machinery Co ltd
Current assignee: Hangzhou Chenghua Machinery Co ltd
Priority date: 2020-08-03
Filing date: 2020-08-03
Publication date: 2021-04-27
Anticipated expiration: 2030-08-03

Abstract

The utility model discloses a take lead screw lift of overload protection function, including the motor, the output of motor is connected with the output shaft, installs the worm in the output shaft cavity, and the bearing is installed in the inside cavity exit of output shaft, and the one end that the output shaft was kept away from to the worm is connected with the worm wheel, and the worm wheel interlock is connected with the runner, and the inside sliding connection of runner has the lead screw, and the top of output shaft is equipped with the screw, is equipped with the recess that is located the screw below on the worm, installs the dog in the screw. When the motor is used, the motor drives the output shaft to rotate, the output shaft drives the worm to rotate through the stop block, the worm drives the worm wheel and the rotating wheel to rotate after rotating, the screw rod is further driven to slide, the screw rod can slide up and down through forward rotation and reverse rotation of the motor, when the bearing capacity of an object supported on the screw rod is larger than the maximum bearing capacity of the motor, the stop block can be broken when the motor operates, the motor is prevented from being damaged due to overlarge bearing capacity, and therefore overload protection of the screw rod lifter is achieved.

Description

Screw rod lifter with overload protection function

Technical Field

The utility model relates to a lift field, specific field is a take lead screw lift of overload protection function.

Background

The screw rod lifter is also called a spiral transmission mechanism, is mainly used for converting rotary motion into linear motion or converting linear motion into rotary motion, and is widely applied to various industries such as machinery, metallurgy, building, chemical engineering, medical treatment, cultural health and the like. The screw rod lifter consists of a worm gear speed reducer and a screw rod, wherein the speed reduction part is in worm transmission, the worm is driven by the worm to realize speed reduction, the worm gear is equivalent to a nut for lifting the screw rod, and the lifting speed of the screw rod lifter is equal to the input rotating speed of the worm divided by the reduction ratio of the worm gear and the worm and then multiplied by the screw pitch of the screw rod.

Lead screw lift is when in actual use, because the weight of the uncertain object that need go up and down, often can appear going up and down the object overweight, cause motor output not enough, cause the condition of motor damage, bring very big inconvenience for the actual work, also cause loss of property.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a take lead screw lift of overload protection function to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a take lead screw lift of overload protection function, includes the motor, the output of motor is connected with the output shaft, the inside cavity structure that is of output shaft, just the output shaft is kept away from the one end of motor is equipped with the export, install the worm in the output shaft cavity, the worm runs through and extends to the outside of output shaft, the bearing is installed in the inside cavity exit of output shaft, the bearing housing is in the outer wall of worm, the worm is kept away from the one end of output shaft is connected with the worm wheel, the worm wheel interlock is connected with the runner, the inside sliding connection of runner has the lead screw.

Preferably, the top of output shaft is equipped with the screw, the screw runs through and extends to the inside cavity of output shaft, be equipped with on the worm and be located the recess of screw below, the screw with the recess is cylinder type structure, just the screw with the recess diameter is the same.

Preferably, a stop block is installed in the screw hole and is of a cylindrical structure, and the diameter of the stop block is the same as that of the screw hole.

Preferably, the bottom end of the stop block is located at the bottom of the groove, the top end of the stop block is located in the screw hole, and the top end of the stop block is lower than the top end of the output shaft.

Preferably, the maximum bearing capacity of the stop block is smaller than the maximum output force of the motor, and when the output force of the motor is larger than the maximum bearing capacity of the stop block, the stop block can be broken.

Preferably, the stopper is of a ferrous structure.

Preferably, the top of the stop block is connected with a screw matched with the screw hole in size, and the screw can slide in the screw hole when screwed.

Preferably, the screw slides in the screw hole for a distance greater than the distance from the top end of the stop block to the top end of the output shaft.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model provides a take lead screw lift of overload protection function, which comprises a motor, the output of motor is connected with the output shaft, install the worm in the output shaft cavity, the bearing is installed in the inside cavity exit of output shaft, the one end that the output shaft was kept away from to the worm is connected with the worm wheel, the worm wheel interlock is connected with the runner, the inside sliding connection of runner has the lead screw, the top of output shaft is equipped with the screw, be equipped with the recess that is located the screw below on the worm, install the dog in the screw. When the motor is used, the motor drives the output shaft to rotate, the output shaft drives the worm to rotate through the stop block, the worm drives the worm wheel and the rotating wheel to rotate after rotating, the screw rod is further driven to slide, the screw rod can slide up and down through forward rotation and reverse rotation of the motor, when the bearing capacity of an object supported on the screw rod is larger than the maximum bearing capacity of the motor, the stop block can be broken when the motor operates, the motor is prevented from being damaged due to overlarge bearing capacity, and therefore overload protection of the screw rod lifter is achieved.

Drawings

Fig. 1 is a schematic view of the structure of the present invention;

fig. 2 is a schematic top view of the present invention;

fig. 3 is a schematic structural view of the output shaft, the worm, the bearing, the screw hole, the groove, the stopper and the screw of the present invention.

In the figure: 1. a motor; 2. an output shaft; 3. a worm; 4. a bearing; 5. a worm gear; 6. a rotating wheel; 7. a screw rod; 8. a screw hole; 9. a groove; 10. a stopper; 11. and (4) screws.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1: referring to fig. 1-3, the present invention provides a technical solution: the utility model provides a take lead screw lift of overload protection function, its characterized in that, includes motor 1, the output of motor 1 is connected with output shaft 2, the inside cavity structure that is of output shaft 2, just output shaft 2 keeps away from the one end of motor 1 is equipped with the export, install worm 3 in the output shaft 2 cavity, worm 3 runs through and extends to the outside of output shaft 2, bearing 4 is installed in the inside cavity exit of output shaft 2, the bearing 4 cover is in the outer wall of worm 3, the one end that worm 3 kept away from output shaft 2 is connected with worm wheel 5, worm wheel 5 interlock is connected with runner 6, runner 6 internal sliding connection has lead screw 7, through motor 1 drives output shaft 2 rotates, output shaft 2 drives worm 3 rotates, worm 3 rotates the back drives worm wheel 5, worm wheel 5, The rotating wheel 6 rotates to further drive the screw rod 7 to slide, and the screw rod 7 slides up and down through positive rotation and negative rotation of the motor 1.

Particularly, the top of output shaft 2 is equipped with screw 8, screw 8 runs through and extends to the inside cavity of output shaft 2, be equipped with on the worm 3 and be located recess 9 of screw 8 below, screw 8 with recess 9 is the cylinder type structure, just screw 8 with recess 9 diameter is the same, makes dog 10 can pass screw 8 and fall on recess 9 bottom.

Particularly, install dog 10 in the screw 8, dog 10 is the cylinder type structure, the diameter of dog 10 with the diameter of screw 8 is the same, makes dog 10 can screw 8 with do not rock in the recess 9, and the holding is stable, thereby makes motor 1 passes through dog 10 stably drives worm 3 rotates, further realizes the stable slip of lead screw 7.

Specifically, the bottom end of the stop block 10 is located at the bottom of the groove 9, the top end of the stop block 10 is located in the screw hole 8, and the top end of the stop block 10 is lower than the top end of the output shaft 2, so that a space for the screw 11 to slide is provided.

Particularly, the maximum bearing capacity of the stop block 10 is smaller than the maximum output force of the motor 1, when the output force of the motor 1 is larger than the maximum bearing capacity of the stop block 10, the stop block 10 can be broken, so that when the bearing capacity of the supporting object on the screw rod 7 is larger than the maximum bearing capacity of the motor 1, the stop block 10 can be broken when the motor 1 runs, and the motor 1 is prevented from being damaged due to overlarge bearing capacity.

Specifically, the stopper 10 is made of iron so that when the stopper 10 is broken, the motor 1 is turned off and then the screw 11 is unscrewed, and the broken stopper 10 can be sucked out by a magnet.

Specifically, the top of the stop block 10 is connected with a screw 11 matched with the screw hole 8 in size, and the screw 11 can slide in the screw hole 8 when being screwed, so that the stop block 10 is fixed, and the stop block 10 is prevented from sliding up and down in the screw hole 8.

Specifically, the screw 11 slides in the screw hole 8 for a distance greater than the distance from the top end of the stopper 10 to the top end of the output shaft 2, so that the screw 11 has a sufficient length to fix the stopper 10.

For the convenience of understanding the technical solution of the present invention, the following detailed description is made on the working principle or the operation mode of the present invention in the practical process.

When the overload protection device is in actual use, after the elevator is assembled, the motor 1 drives the output shaft 2 to rotate, the output shaft 2 drives the worm 3 to rotate through the stop block 10, the worm 3 drives the worm wheel 5 and the rotating wheel 6 to rotate after rotating, the screw rod 7 is further driven to slide, the up-and-down sliding of the screw rod 7 is realized through the forward rotation and the reverse rotation of the motor 1, when the bearing capacity of a supporting object on the screw rod 7 is larger than the maximum bearing capacity of the motor 1, the stop block 10 can be broken when the motor 1 operates, the motor 1 is prevented from being damaged due to overlarge bearing capacity, the motor 1 is stopped after the stop block 10 is broken, then the screw 11 is unscrewed, the broken stop block 10 is sucked out through the magnet, a new stop block 10 is replaced, and the screw 11 is screwed again.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a take lead screw lift of overload protection function, its characterized in that, includes motor (1), the output of motor (1) is connected with output shaft (2), the inside cavity structure that is of output shaft (2), just output shaft (2) are kept away from the one end of motor (1) is equipped with the export, install worm (3) in the output shaft (2) cavity, worm (3) run through and extend to the outside of output shaft (2), bearing (4) are installed in the inside cavity exit of output shaft (2), bearing (4) cover is in the outer wall of worm (3), worm (3) are kept away from the one end of output shaft (2) is connected with worm wheel (5), worm wheel (5) interlock is connected with runner (6), runner (6) inside sliding connection has lead screw (7).

2. The screw rod elevator with the overload protection function according to claim 1, wherein a screw hole (8) is formed in the top of the output shaft (2), the screw hole (8) penetrates through and extends to the inner cavity of the output shaft (2), a groove (9) located below the screw hole (8) is formed in the worm (3), the screw hole (8) and the groove (9) are of cylindrical structures, and the screw hole (8) and the groove (9) are the same in diameter.

3. The screw rod elevator with the overload protection function according to claim 2, wherein a stopper (10) is installed in the screw hole (8), the stopper (10) is of a cylindrical structure, and the diameter of the stopper (10) is the same as that of the screw hole (8).

4. The screw rod elevator with the overload protection function according to claim 3, wherein the bottom end of the stop block (10) is located at the bottom of the groove (9), the top end of the stop block (10) is located in the screw hole (8), and the top end of the stop block (10) is lower than the top end of the output shaft (2).

5. The screw rod elevator with the overload protection function is characterized in that the maximum bearing capacity of the stop block (10) is smaller than the maximum output force of the motor (1), and when the output force of the motor (1) is larger than the maximum bearing capacity of the stop block (10), the stop block (10) can be broken.

6. Screw lift with overload protection according to claim 3, characterised in that the stop (10) is of ferrous construction.

7. The screw rod elevator with the overload protection function as claimed in claim 3, wherein a screw (11) matched with the screw hole (8) in size is connected to the top of the stop block (10), and the screw (11) can slide in the screw hole (8) when being screwed.

8. Screw elevator with overload protection according to claim 7, characterised in that the screw (11) slides in the threaded hole (8) over a distance greater than the distance from the top of the stop (10) to the top of the output shaft (2).