CN217355443U

CN217355443U - Safety limiting assembly for preventing over-high rotating speed of screw rod

Info

Publication number: CN217355443U
Application number: CN202221505091.0U
Authority: CN
Inventors: 费瑞阳; 张磊
Original assignee: Fairyland Technology Wuhan Co Ltd
Current assignee: Fairyland Technology Wuhan Co Ltd
Priority date: 2022-06-15
Filing date: 2022-06-15
Publication date: 2022-09-02
Anticipated expiration: 2032-06-15

Abstract

The utility model discloses a prevent too high safety restriction subassembly of lead screw rotational speed, include: the lower end of the clamping tooth box is fixedly provided with an assembly bottom plate, the upper surface of the assembly bottom plate is rotatably provided with a rotating disc, the lower end of the rotating disc is connected with a rotating shaft, and the rotating shaft extends to the lower end of the assembly bottom plate; the slide way is fixedly arranged at the upper end of the rotating disc; the inboard slip of slide is provided with the fixed knot of slip, the inboard of slide still slides and is provided with the slip cassette, the latch box still includes: the tooth grooves are uniformly formed in the inner side of the tooth clamping box; this prevent too high safety restriction subassembly of rotational speed can be used for on various lift lead screws, effectively avoids jacking equipment because of motor or arresting gear trouble, and the lift platform that leads to falls, can control the lead screw rotational speed of high-speed rotation out of control, avoids the goods to fall to damage, injures the staff by a crashing object.

Description

Safety limiting assembly for preventing over-high rotating speed of screw rod

Technical Field

The utility model relates to a protection component technical field specifically is a prevent too high safety restriction subassembly of lead screw rotational speed.

Background

In daily industrial production and life, a lifting device driven by a screw rod is often needed, compared with the traditional hydraulic equipment, the lifting device driven by the screw rod has the characteristics of high adjustment precision, high lifting speed, easiness in control, simple structure and the like compared with the traditional hydraulic lifting device, so that the lifting device is widely applied to various light small lifting equipment;

generally, a stepping motor or a servo motor is mostly adopted to drive a screw rod to rotate to achieve lifting, but the structure is slightly lack of money, for example, the stepping motor is generally subjected to self-powered braking to avoid unnecessary rotation of the screw rod, if the screw rod is powered off or the motor is burnt, the braking capability is lost, if goods are accumulated to reach a certain weight, a carried heavy object can fall off along with the loss of locking of the screw rod, if peripheral personnel are not in time to dodge, and even can be injured by crashing, so that certain life and property hazards are caused.

Therefore, it is necessary to design a safety limiting assembly for preventing the over-rotation speed of the screw rod, which is installed on the screw rod, and the safety limiting assembly can block the rotating shaft when the descending speed of the screw rod exceeds the expected speed, so as to prevent the screw rod from rotating unnecessarily, and avoid the danger of falling down of articles caused by the brake failure of the screw rod.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a prevent too high safety restriction subassembly of lead screw rotational speed to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a safety limit assembly for preventing over-rotation of a lead screw, comprising:

the lower end of the clamping tooth box is fixedly provided with an assembly bottom plate, the upper surface of the assembly bottom plate is rotatably provided with a rotating disc, the lower end of the rotating disc is connected with a rotating shaft, and the rotating shaft extends to the lower end of the assembly bottom plate;

the slide way is fixedly arranged at the upper end of the rotating disc; the inner side of the slideway is slidably provided with a sliding fixing buckle, and the inner side of the slideway is also slidably provided with a sliding clamping seat.

Preferably, the cassette further comprises:

the tooth grooves are uniformly formed in the inner side of the tooth clamping box;

and the cover plate is fixedly arranged at the upper end of the clamping tooth box.

Preferably, the rotating shaft further includes:

and a ball bearing fixedly disposed at an outer side of the rotation shaft, the ball bearing being disposed at an inner side of the assembly base plate.

Preferably, the slide fastener further comprises:

the fixing screws are symmetrically arranged in two groups about a vertical central line of the sliding fixing buckle, and the fixing screws are in threaded connection with the sliding fixing buckle;

and the connecting bolt is fixedly arranged on the front surface of the sliding fixing buckle, extends to the rear side of the sliding fixing buckle, and the rear end of the sliding fixing buckle is connected with a tension spring.

Preferably, the sliding cassette further comprises:

the hexagonal connecting nut is fixedly installed on the front face of the sliding clamping seat, the hexagonal connecting nut is in threaded connection with the sliding clamping seat, and the hexagonal connecting nut is connected to the rear end of the connecting bolt.

Preferably, the ball bearing further comprises:

and the elastic blocking pieces are fixedly arranged at the upper end and the lower end of the ball bearing.

Compared with the prior art, the beneficial effects of the utility model are that: the safety limiting assembly for preventing the over-high rotating speed can be used for various lifting screw rods, effectively prevents a lifting platform from falling down due to the failure of a motor or a braking device of lifting equipment, can control the rotating speed of the screw rods which rotate at a high speed or are out of control, and avoids goods from falling down and damaging workers;

1. the tooth socket is arranged in the tooth clamping box and is unidirectional, the rotating disc is connected with the screw rod, in addition, the upper end of the rotating disc is provided with a sliding clamping seat in a sliding mode through a sliding way, the sliding clamping seat is fixedly connected through a tension spring, when the screw rod, namely the rotating disc, rotates too fast, the sliding clamping seat can be thrown out of the sliding way due to centrifugal force, the sliding clamping seat can clamp the tooth socket in the tooth clamping box, and the rotation of the rotating disc and the screw rod is interrupted, so that articles are prevented from falling;

2. utilize the fixed knot that slides, the fixed knot that has seted up the fixed screw that detains that slides, under the general condition, when the rotational speed of rolling disc is too high, centrifugal force is greater than tension spring's tensile force, the slip cassette just can stretch out from the rolling disc, block the tooth's socket and realize the braking, because the fixed knot that slides passes through the connecting bolt and connect tension spring, consequently can be through the fixed position of the fixed knot that slides of adjustment, adjust tension spring and the advance position of slip cassette, and then reduce or improve the centrifugal force of throwing away the slip cassette, satisfy the restriction demand of multiple lead screw.

Drawings

FIG. 1 is a schematic view of the overall three-dimensional structure of the present invention;

FIG. 2 is a schematic view of the three-dimensional structure of the disassembled cover plate of the present invention;

FIG. 3 is a schematic perspective view of the rotating disc and the assembly bottom plate of the present invention;

fig. 4 is a schematic perspective view of the rotating disk of the present invention.

In the figure: 1. a latch box; 2. fixing screws; 3. a cover plate; 4. assembling a bottom plate; 5. a tooth socket; 6. rotating the disc; 7. a rotating shaft; 8. a slideway; 9. sliding the fixing buckle; 10. a tension spring; 11. a connecting bolt; 12. a hexagonal connection nut; 13. a sliding card holder; 14. a ball bearing; 15. an elastic baffle plate.

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 efforts all belong to the protection scope of the present invention.

Referring to fig. 1-4, a safety limiting assembly for preventing over-rotation of a screw comprises: the lower end of the latch box 1 is fixedly provided with an assembly bottom plate 4, the upper surface of the assembly bottom plate 4 is rotatably provided with a rotating disc 6, the lower end of the rotating disc 6 is connected with a rotating shaft 7, and the rotating shaft 7 extends to the lower end of the assembly bottom plate 4; a slide way 8 fixedly arranged at the upper end of the rotating disc 6; the inner side of the slideway 8 is provided with a sliding fixing buckle 9 in a sliding way, and the inner side of the slideway 8 is also provided with a sliding clamping seat 13 in a sliding way. The latch box 1 further includes: tooth grooves 5 uniformly formed inside the latch box 1; and a cover plate 3 fixedly installed at the upper end of the latch case 1. The rotating shaft 7 further includes: the ball bearing 14 is fixedly arranged on the outer side of the rotating shaft 7, the ball bearing 14 is arranged on the inner side of the assembly bottom plate 4, the tooth clamping box 1 and the rotating disc 6 are utilized, the tooth groove 5 is arranged inside the tooth clamping box 1, the tooth groove 5 is one-way, the rotating disc 6 is connected with a screw rod, in addition, the upper end of the rotating disc 6 is provided with a sliding clamping seat 13 in a sliding mode through a sliding rail 8, the sliding clamping seat 13 is fixedly connected through a tension spring 10, when the screw rod, namely the rotating disc 6, rotates too fast, the sliding clamping seat 13 can be thrown out of the sliding rail 8 due to centrifugal force, the sliding clamping seat 13 can clamp the tooth groove 5 in the tooth clamping box 1, the rotation of the rotating disc 6 and the screw rod is interrupted, and therefore articles are prevented from falling down

Referring to fig. 1-4, a safety limiting assembly for preventing over-rotation of a screw comprises: the sliding fixing buckle 9 further comprises: the fixing screws 2 are arranged at the upper end of the sliding fixing buckle 9, the two groups of fixing screws 2 are symmetrically arranged about the vertical central line of the sliding fixing buckle 9, and the fixing screws 2 are connected with the sliding fixing buckle 9 in a threaded manner; and a connecting bolt 11 fixedly installed on the front surface of the sliding fixing buckle 9, wherein the connecting bolt 11 extends to the rear side of the sliding fixing buckle 9, and the rear end of the sliding fixing buckle 9 is connected with a tension spring 10. The slide holder 13 further includes: the hexagonal coupling nut 12 is fixedly installed on the front surface of the sliding clamping seat 13, the hexagonal coupling nut 12 is connected with the sliding clamping seat 13 in a threaded manner, and the hexagonal coupling nut 12 is connected to the rear end of the coupling bolt 11. The ball bearing 14 further includes: elastic catch 15, it is fixed to set up at ball bearing 14 upper and lower both ends, utilize slip fixed knot 9, set up fixed screw 2 on the slip fixed knot 9, under the normal conditions, when the rotational speed of rolling disc 6 is too high, centrifugal force is greater than tension spring 10's tensile force, slip cassette 13 just can stretch out from rolling disc 6, block tooth's socket 5 and realize the braking, because slip fixed knot 9 passes through connecting bolt 11 and connects tension spring 10, consequently, can be through adjusting the fixed position of slip fixed knot 9, adjust the preset position of tension spring 10 with slip cassette 13, and then reduce or improve the centrifugal force of throwing away slip cassette 13, satisfy the restriction demand of multiple lead screw, the restriction demand of multiple lead screw is satisfied

In conclusion: the device is arranged on a screw rod lifting device, a rotating shaft 7 of a rotating disc 6 is connected to a screw rod, a clamping tooth box 1 is provided with an assembly bottom plate 4, the assembly bottom plate 4 is directly connected to the upper end of the lifting device, the rotating shaft 7 of the rotating disc 6 penetrates through the assembly bottom plate 4, friction is reduced through a ball bearing 14, the ball bearing 14 encapsulates and fixes a ball through an elastic blocking piece 15, a sliding fixing buckle 9 and a sliding clamping seat 13 are arranged at the upper end of the rotating disc 6 in a sliding mode through a sliding way 8, the sliding fixing buckle 9 is connected with a tension spring 10 through a connecting bolt 11, the tension spring 10 is connected with the sliding clamping seat 13 through a hexagonal connecting nut 12, the sliding fixing buckle 9 is fixed in the sliding way 8 through a fixing screw 2, when the rotating speed of the screw rod is too high, the rotating disc 6 rotates to generate centrifugal force, the sliding clamping seat 13 can be thrown out by the centrifugal force to clamp a tooth socket 5 of the clamping tooth box 1, and the tooth socket 5 is unidirectional, therefore, when the screw rod rotates forwards and rises, the sliding clamping seat 13 cannot be clamped into the tooth groove 5, and meanwhile, the position of the sliding fixing buckle 9 can be adjusted by loosening the fixing screw 2, and the centrifugal force for throwing the sliding clamping seat 13 out of the rotating disc 6 is adjusted, so that the use of the whole safety limiting assembly is completed.

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.

Claims

1. A safety limiting assembly for preventing over-rotation of a screw, comprising:

the clamping tooth box (1) is a main shell part of the device, the lower end of the clamping tooth box (1) is fixedly provided with an assembly bottom plate (4), the upper surface of the assembly bottom plate (4) is rotatably provided with a rotating disc (6), the lower end of the rotating disc (6) is connected with a rotating shaft (7), and the rotating shaft (7) extends to the lower end of the assembly bottom plate (4);

the slide way (8) is fixedly arranged at the upper end of the rotating disc (6); the inner side of the slide way (8) is provided with a sliding fixing buckle (9) in a sliding manner, and the inner side of the slide way (8) is also provided with a sliding clamping seat (13) in a sliding manner.

2. A safety limit assembly against overrotation of the screw according to claim 1, characterized in that the cassette (1) further comprises:

the tooth grooves (5) are uniformly formed in the inner side of the tooth clamping box (1);

and the cover plate (3) is fixedly arranged at the upper end of the latch box (1).

3. A safety limiting assembly for preventing over-rotation of a screw according to claim 1, wherein said rotating shaft (7) further comprises:

and a ball bearing (14) fixedly arranged on the outer side of the rotating shaft (7), wherein the ball bearing (14) is arranged on the inner side of the assembly bottom plate (4).

4. A safety limiter assembly as claimed in claim 1, wherein the slide fastener (9) further comprises:

the fixing screws (2) are arranged at the upper end of the sliding fixing buckle (9), the fixing screws (2) are symmetrically arranged in two groups relative to the vertical central line of the sliding fixing buckle (9), and the fixing screws (2) are in threaded connection with the sliding fixing buckle (9);

the connecting bolt (11) is fixedly arranged on the front face of the sliding fixing buckle (9), the connecting bolt (11) extends to the rear side of the sliding fixing buckle (9), and the rear end of the sliding fixing buckle (9) is connected with a tension spring (10).

5. A safety limiter assembly as claimed in claim 1, wherein the slide holder (13) further comprises:

the hexagonal connection nut (12) is fixedly installed on the front face of the sliding clamping seat (13), the hexagonal connection nut (12) is in threaded connection with the sliding clamping seat (13), and the hexagonal connection nut (12) is connected to the rear end of the connection bolt (11).

6. A safety limiter assembly according to claim 3 wherein said ball bearing (14) further comprises:

and elastic blocking pieces (15) fixedly arranged at the upper end and the lower end of the ball bearing (14).