CN212455255U

CN212455255U - Novel torque limiter and torque limiting worm

Info

Publication number: CN212455255U
Application number: CN202021441001.7U
Authority: CN
Inventors: 周飞; 黄建昌; 芮正国; 沈庆
Original assignee: Oechsler Plastic Products Taicang Co Ltd
Current assignee: Oechsler Plastic Products Taicang Co Ltd
Priority date: 2020-07-21
Filing date: 2020-07-21
Publication date: 2021-02-02
Anticipated expiration: 2030-07-21

Abstract

The utility model belongs to the technical field of torque limiter, concretely relates to novel torque limiter and torque limiting worm. The novel torque limiter comprises a sleeve and an inner frame assembly arranged in the sleeve; the inner wall of the sleeve is provided with a group of grooves along the axial direction; the inner frame assembly comprises a frame core, a group of elastic sheets and a convex strip; the elastic sheets are arranged on the frame core along the circumferential direction, and the raised lines are arranged on the elastic sheets along the axial direction; the convex strip is clamped into the groove. The utility model discloses further provide a moment of torsion restriction worm on this basis. The utility model provides a novel torque limiter, compact structure is small and exquisite, and the moment of torsion transmission is big, and the operation is reliable stable, and convenient assembling is nimble, is applicable to the modularization production, and the comprehensive cost is lower. The utility model provides a characteristics such as moment restriction worm still have hiding, lightweight, occupation space and super large moment of torsion except having inherited the above-mentioned advantage of moment of torsion limiter.

Description

Novel torque limiter and torque limiting worm

Technical Field

The utility model belongs to the technical field of torque limiter, concretely relates to novel torque limiter and torque limiting worm.

Background

Torque limiters are a class of torque protection and control devices, both mechanical and electromagnetic, that are widely used in various fields requiring torque limitation. Taking the application of household appliances and smart homes as an example, the torque limiter is often applied to various actuators to protect the transmission parts and structural members inside the actuators during overload, such as patents CN106761149B, CN106639736B, CN111023685A and the like disclosed by the present company. With the deep evolution and development of modern household appliances and smart homes, the structure is required to be hidden and light-weighted, however, the development and research of the existing torque limiter on the hidden and light-weighted aspect still needs to be further promoted. The existing mechanical torque limiter mainly comprises two main types of disc type and cylinder type according to structural classification. The disc type torque limiter occupies a large space due to the fact that the rotating shaft is perpendicular to the disc, and is not beneficial to hiding and light-weight design. The existing cylindrical torque limiter is mainly characterized in that internal contact parts are circumferentially arranged, all axial parts are stressed unevenly or partial areas are not stressed, the torque is small under the same volume, the abrasion processes at all parts are different, the stability is poor, and the service life is short. Meanwhile, the existing torque limiter has the problems of difficult torque adjustment, complex structure, inconvenient assembly and the like. The utility model discloses an in the implementation process, we have still found that in current all kinds of executor, the torque limiter often establishes ties as an independent part in transmission structure, and this kind of design integrated level is low, and occupation space is big. Moreover, the independent torque limiter is often limited by the structural arrangement and cannot be arranged at the lowest torque position of the transmission structure, so that the structure is further increased, the occupied space is large, and the flexibility is poor.

Disclosure of Invention

The utility model provides a novel torque limiter and torque limiting worm to overcome the above-mentioned problem that exists among the prior art.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a novel torque limiter comprises a sleeve and an inner frame assembly arranged in the sleeve; the inner wall of the sleeve is provided with a group of grooves along the axial direction; the inner frame assembly comprises a frame core, a group of elastic sheets and a convex strip; the elastic sheets are arranged on the frame core along the circumferential direction, and the raised lines are arranged on the elastic sheets along the axial direction; the convex strip is clamped into the groove. The novel torque limiter has two working states during working. When the torque that receives is less, can not take place to break away from after the sand grip card goes into the recess, and the inner tower subassembly is static relatively with the sleeve pipe this moment, can transmit the torque. When the moment of torsion that receives is great, the sand grip breaks away from the recess, and the frame subassembly takes place to skid with the sleeve pipe in this moment to the too big moment of torsion transmission of restriction. This novel torque limiter uses multiunit recess and sand grip as main atress part, and its area of contact is big, and the contact is reliable and stable, and wearing and tearing are few, and is longe-lived, and the moment of torsion that can transmit under equal volume condition is big. In addition, the maximum torque deliverable by the novel torque limiter can be designed and adjusted in a manner including, but not limited to, the following: adjusting the number, length, shape and size of the grooves and the raised lines; the thickness, width and material of the elastic sheet are adjusted.

Furthermore, the novel torque limiter is also provided with a mounting hole on the frame core.

Furthermore, above-mentioned novel torque limiter, frame core, shell fragment, sand grip three preferably adopt integrated into one piece's mode to connect, and the reliability is high and low in production cost.

Furthermore, in the novel torque limiter, the elastic sheet comprises a straight section and an arc section; the straight segment is arranged on the frame core; the arc segments are connected with the straight segments, and the extension directions of the straight segments and the arc segments are opposite; the convex strip is arranged on the edge of the arc segment. Wherein, the straight segment mainly plays a supporting role and is assisted with an elastic role; the arc segments mainly play an elastic role and are assisted with a supporting role; the straight segment and the arc segment extend in opposite directions to form an acute angle between the straight segment and the arc segment, so that a larger elastic space is generated, the elastic sheet is ensured not to be fatigued or broken, and the stress of the convex strip is relatively uniform and soft in the process of clamping into and separating from the groove.

Furthermore, a slingshot is further arranged between the frame core and the convex strip of the novel torque limiter. The maximum transmission torque of the novel torque limiter can be adjusted by arranging the slingshot, the number of the slingshot can be the same as that of the elastic pieces, the number of the elastic pieces can also be less than that of the elastic pieces, and the slingshot can be adjusted and assembled according to actual requirements. The catapult is for dismantling the setting, can conveniently adjust the moment of torsion through the model of selecting the catapult and the number of catapult, and this kind of regulative mode is more simple nimble in other modes relatively, has higher commonality, and need not make interior frame subassembly and sleeve again, especially is fit for modern industry modular production.

Furthermore, in the novel torque limiter, the back surface of the convex strip is provided with a first catapult groove; a group of second catapult grooves are axially formed in the outer side of the frame core; the first slingshot groove is opposite to the second slingshot groove in position; the catapult is clamped in the first catapult groove and the second catapult groove.

Further, in the novel torque limiter, the slingshot preferably uses a frame-shaped slingshot. The stress of each stress point of the frame-shaped slingshot is uniform and stable, so that the abrasion of the raised bars in the long-term use process is relatively uniform, and the stability and the reliability of the operation of the torque limiter are ensured.

Further, in the novel torque limiter, the first slingshot groove and the second slingshot groove are preferably dovetail grooves.

The utility model also provides a torque limiting worm, its structure is that the worm cover is established to above-mentioned novel torque limiter overcoat. The technical scheme breaks through the conventional independent thinking mode, skillfully integrates the worm and the novel torque limiter into a whole, and brings various beneficial effects. It achieves torque limiting and protection functions for high torques without any space penalty. The utility model provides a torque limiter wholly is the tubbiness, agrees with just with the shaft-like of worm, consequently sets up torque limiter in the worm and not only realizes hiding completely not occuping a space, can not cause adverse effect to the structural strength and the performance of worm moreover. The worm gear and the worm are widely applied one-way power transmission devices with large-proportion speed reduction and torque increase, the torque borne by the worm is usually the smallest or smaller in the whole set of transmission devices, and therefore the arrangement of the torque limiter in the worm has the inherent advantage of low torque requirement and is beneficial to structure miniaturization. On the basis, the torque limiter has the characteristics of compact structure and large torque by matching with the torque limiter, and finally, the torque limiter has the beneficial effects of large torque transmission, no extra space occupation, reliability, stability, hiding, light weight and the like. The utility model provides a moment of torsion restriction worm derives from the excavation, the consideration and the fit of above many-sided key element, and its design not only needs the real field basic knowledge of binding, also needs abundant imagination and creativity.

Further, the torque of the torque limit worm is limited, the worm sleeve is sleeved on the sleeve, and the worm sleeve and the sleeve can be integrally connected or detachably connected.

Has the advantages that: according to the technical scheme provided by the utility model, the utility model provides a novel torque limiter, compact structure is small and exquisite, and the moment of torsion transmission is big, and the operation is reliable stable, and convenient assembling is nimble, is applicable to the modular production, and the comprehensive cost is lower. The utility model provides a characteristics such as moment restriction worm still have hiding, lightweight, occupation space and super large moment of torsion except having inherited the above-mentioned advantage of moment of torsion limiter.

Drawings

FIGS. 1 and 2 are schematic structural views of example 1;

FIGS. 3 and 4 are schematic structural views of torque limiters according to

embodiments

2 and 3;

FIG. 5 is an enlarged view of a portion of FIG. 4;

fig. 6 is a schematic structural view of a torque-limiting worm according to embodiment 3.

In the figure, the casing 1, the inner rack assembly 2, the worm housing 3, the groove 11, the rack core 21, the spring plate 22, the convex strip 23, the slingshot 24, the mounting hole 211, the second slingshot groove 212, the straight section 221, the arc section 222 and the first slingshot groove 231.

Detailed Description

The present invention is further illustrated by the following specific examples, which are intended to be illustrative only and not limiting.

Example 1

A novel torque limiter is shown in figures 1 and 2 and comprises a sleeve 1 and an inner frame assembly 2 arranged in the sleeve 1; a group of grooves 11 are axially formed in the inner wall of the sleeve 1; the inner frame assembly 2 comprises a frame core 21, a group of spring plates 22 and a convex strip 23; the elastic sheet 22 is arranged on the frame core 21 along the circumferential direction, and the convex strip 23 is arranged on the elastic sheet 22 along the axial direction; the rib 23 snaps into the groove 11.

In this embodiment, the frame core 21 is further provided with a mounting hole 211.

Example 2

A novel torque limiter is shown in figures 3 to 5 and comprises a sleeve 1 and an inner frame assembly 2 arranged in the sleeve 1; a group of grooves 11 are axially formed in the inner wall of the sleeve 1; the inner frame assembly 2 comprises a frame core 21, a group of spring plates 22 and a convex strip 23; the elastic sheet 22 is arranged on the frame core 21 along the circumferential direction, and the convex strip 23 is arranged on the elastic sheet 22 along the axial direction; the rib 23 snaps into the groove 11.

In this embodiment, the frame core 21, the spring plate 22, and the protruding strip 23 are integrally formed.

In this embodiment, the resilient plate 22 includes a straight segment 221 and an arc segment 222; the straight segment 221 is arranged on the frame core 21; the arc segment 222 is connected with the straight segment 221, and the straight segment 221 and the arc segment 222 extend in opposite directions; the ribs 23 are provided at the edges of the arc segments 222.

In this embodiment, a slingshot 24 is further disposed between the frame core 21 and the protruding strip 23.

In this embodiment, the back of the protruding strip 23 is provided with a first catapult slot 231; a group of second catapult grooves 212 are axially arranged on the outer side of the frame core 21; the first bow groove 231 is located opposite to the second bow groove 212; the slingshot 24 is clamped in the first slingshot groove 231 and the second slingshot groove 212.

In the present embodiment, the slingshot 24 is a frame-shaped slingshot.

In this embodiment, the first bow groove 231 and the second bow groove 212 are dovetail grooves.

Example 3

A torque limiting worm is shown in fig. 6 and comprises a torque limiter and a worm sleeve 3 which is detachably sleeved outside the torque limiter. Wherein the torque limiter is as shown in figures 3 to 5.

In the embodiment, the torque limiter comprises a sleeve 1 and an inner frame assembly 2 arranged in the sleeve 1; a group of grooves 11 are axially formed in the inner wall of the sleeve 1; the inner frame assembly 2 comprises a frame core 21, a group of spring plates 22 and a convex strip 23; the elastic sheet 22 is arranged on the frame core 21 along the circumferential direction, and the convex strip 23 is arranged on the elastic sheet 22 along the axial direction; the rib 23 snaps into the groove 11.

In the present embodiment, the slingshot 24 is a frame-shaped slingshot.

The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements can be made without departing from the principle of the present invention, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. A novel torque limiter is characterized in that: comprises a sleeve (1) and an inner frame component (2) arranged in the sleeve (1); a group of grooves (11) are axially formed in the inner wall of the sleeve (1); the inner frame assembly (2) comprises a frame core (21), a group of elastic sheets (22) and a convex strip (23); the elastic sheet (22) is arranged on the frame core (21) along the circumferential direction, and the convex strip (23) is arranged on the elastic sheet (22) along the axial direction; the convex strip (23) is clamped into the groove (11).

2. The novel torque limiter according to claim 1, wherein: the frame core (21) is also provided with a mounting hole (211).

3. The novel torque limiter according to claim 1, wherein: the frame core (21), the spring plate (22) and the convex strip (23) are integrally formed.

4. The novel torque limiter according to claim 3, wherein: the spring plate (22) comprises a straight segment (221) and an arc segment (222); the straight segment (221) is arranged on the frame core (21); the arc segments (222) are connected with the straight segments (221), and the straight segments (221) and the arc segments (222) extend in opposite directions; the convex strips (23) are arranged at the edges of the arc segments (222).

5. The novel torque limiter according to any one of claims 1 to 4, wherein: a slingshot (24) is arranged between the frame core (21) and the convex strip (23).

6. The novel torque limiter according to claim 5, wherein: the back of the convex strip (23) is provided with a first catapult groove (231); a group of second catapult grooves (212) are axially formed in the outer side of the frame core (21); the first bow slot (231) is located opposite the second bow slot (212); the slingshot (24) is clamped in the first slingshot groove (231) and the second slingshot groove (212).

7. The novel torque limiter according to claim 6, wherein: the slingshot (24) is a frame-shaped slingshot.

8. The novel torque limiter according to claim 6, wherein: the first slingshot groove (231) and the second slingshot groove (212) are dovetail grooves.

9. A torque-limiting worm, characterized by: a worm sleeve (3) is sleeved outside the novel torque limiter according to any one of claims 1 to 8.

10. The torque-limiting worm of claim 9, wherein: the worm sleeve (3) is sleeved on the sleeve (1), and the worm sleeve (3) and the sleeve (1) are integrated or detachably connected.