A new type of torque limiter

Abstract

The utility model belongs to the field of torque limiters, and particularly relates to a novel torque limiter, comprising a rotating shell and a rotating inner main body on the same central axis, wherein torque with a limited value is transmitted between the rotating shell and the rotating inner main body, a plurality of engaging recesses are arranged on the inner circumference of the rotating shell, and sliding bodies matched with the engaging recesses are arranged on the outer circumference of the rotating inner main body in a one-to-one correspondence, the sliding bodies are connected to a force body, and the force body acts on the sliding body so that the outer end of the sliding body engages with the engaging recess to transmit the torque, and when a rotational torque exceeding a predetermined value is added to the rotating shell and the rotating inner main body, the engaging recess and the outer end of the sliding body are disengaged, so that the rotating shell and the rotating inner main body rotate relative to each other. The utility model provides a novel torque limiter, which has the advantages of relatively simple structure, easy assembly, stable use, long service life, and the like.

Description

Technical Field

[0001] The utility model belongs to the field of torque limiters, in particular to a novel torque limiter. Background Art

[0002] There are many types of torque limiter structures. The most stable structure currently generally includes a rotating shell and a rotating inner body, between which a limited torque is transmitted.

[0003] For example, patent CN105745462B discloses a torque limiter, which is similar to the above-mentioned structure, but this structure may be complicated to assemble, has a somewhat complex structure, may have some stability issues, and the market also needs new structures to enrich the market and facilitate customer selection. Utility Model Content

[0004] The utility model provides a novel torque limiter, which can solve the problems pointed out in the background technology.

[0005] A new torque limiter comprises a rotating shell and a rotating inner body on the same central axis, wherein torque of a limited value is transmitted between the rotating shell and the rotating inner body, a plurality of engaging recesses are provided on the inner circumference of the rotating shell, and sliding bodies cooperating with the engaging recesses are provided on the outer circumference of the rotating inner body in a one-to-one correspondence, the sliding bodies are connected to a force body, and the force body acts on the sliding body so that the outer end of the sliding body engages with the engaging recess, thereby transmitting torque, and when a rotational torque exceeding a predetermined value is applied to the rotating shell and the rotating inner body, the engaging recess and the outer end of the sliding body are disengaged, thereby causing relative rotation between the rotating shell and the rotating inner body.

[0006] Preferably, a circumferential array of limiting grooves is provided on the outer circumference of the rotating inner body, and the force acting body is limited by the circumferential array of limiting grooves.

[0007] Preferably, the force body is a compression spring.

[0008] Preferably, the sliding body comprises a limiting sleeve at an inner end and a sliding contact body at an outer end, and the limiting sleeve is used for limiting connection of the force body.

[0009] Preferably, the sliding contact body is a cone, a frustum, a sphere or an arc, and the engaging recess is consistent with it.

[0010] Preferably, an axis connecting hole is provided at the axis center of the rotating inner body.

[0011] Preferably, the shaft connecting hole is a polygonal hole with a keyway, a rectangular hole with a keyway, or a spline hole.

[0012] Preferably, the rotating shell includes a main shell and a connecting sleeve connected to the main shell, a rotating inner body is arranged in the main shell, and a connecting piece is arranged on the connecting sleeve.

[0013] Beneficial effects: The utility model provides a new torque limiter, which has the advantages of relatively simple structure, easy assembly, stable use, long service life, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the internal section of the utility model.

[0015] Figure 2 It is a schematic diagram of the overall structure of the utility model.

[0016] Description of reference numerals:

[0017] The reference numerals in the figure are: rotating housing 1; main housing 11; connecting sleeve 12; connecting member 13; rotating inner body 2; sliding body 21; force body 22; limiting groove 23; limiting sleeve 211; sliding contact body 212; engaging recess 24; shaft connecting hole 25. DETAILED DESCRIPTION

[0018] A specific implementation of the present utility model is described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present utility model is not limited by the specific implementation mode.

[0019] Embodiment 1:

[0020] like Figure 1-2 As shown, a novel torque limiter comprises a rotating shell 1 and a rotating inner body 2 on the same central axis, and torque of a limited value is transmitted between the rotating shell 1 and the rotating inner body 2. A plurality of engaging recesses 24 are provided on the inner circumference of the rotating shell 1, and sliding bodies 21 cooperating with the engaging recesses 24 are provided on the outer circumference of the rotating inner body 2 in a one-to-one correspondence, and the sliding bodies 21 are connected to the force bodies 22, and the force bodies 22 act on the sliding bodies 21 so that the outer ends of the sliding bodies 21 engage with the engaging recesses 24, and torque transmission is performed. When a rotational torque exceeding a predetermined value is added to the rotating shell 1 and the rotating inner body 2, the engaging recesses 24 and the outer ends of the sliding bodies 21 are disengaged, so that the rotating shell 1 and the rotating inner body 2 rotate relative to each other.

[0021] Specifically, the circumferential array limit grooves 23 are provided on the outer circumference of the rotating inner main body 2, and the force body 22 is limited by the circumferential array limit grooves 23. The force body 22 is a compression spring. The elastic coefficient, material, length and other related indicators of the compression spring can be selected accordingly according to the torque value. The sliding body 21 includes a limit sleeve 211 at the inner end and a sliding contact body 212 at the outer end. The limit sleeve 211 is used for the limiting connection of the force body 22, that is, the inner side of the compression spring is limited by the limit grooves 23, and the outer side is limited by the limit sleeve 211. The sliding contact body 212 is a cone or a frustum or a sphere or an arc, and the engaging recess 24 is consistent with it.

[0022] Specifically, an axis connecting hole 25 is provided at the axis center of the rotating inner body 2. The axis connecting hole 25 is used to connect external power for power input. The axis connecting hole 25 is a polygonal hole with a keyway or a rectangular hole with a keyway or a spline hole. The rotating shell 1 includes a main shell 11 and a connecting sleeve 12 connected to the main shell 11. The rotating inner body 2 is provided in the main shell 11. The connecting sleeve 12 has a connecting piece 13. The connecting piece 13 is used to connect with a gear box, a transmission box, etc.

[0023] The above disclosures are only several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A novel torque limiter, comprising a rotating shell (1) and a rotating inner body (2) on the same central axis, wherein a torque with a limited value is transmitted between the rotating shell (1) and the rotating inner body (2), characterized in that: A plurality of engaging recesses (24) are provided on the inner circumference of the rotating shell (1), and sliding bodies (21) cooperating with the engaging recesses (24) are provided on the outer circumference of the rotating inner body (2) in a one-to-one correspondence. The sliding bodies (21) are connected to a force body (22), and the force body (22) acts on the sliding body (21), so that the outer end of the sliding body (21) engages with the engaging recesses (24), and torque is transmitted. When a rotational torque greater than a predetermined value is applied to the rotating shell (1) and the rotating inner body (2), the engaging recesses (24) and the outer end of the sliding body (21) are disengaged, so that the rotating shell (1) and the rotating inner body (2) rotate relative to each other.

2. A novel torque limiter according to claim 1, characterized in that: The outer circumference of the rotating inner body (2) is provided with a circumferential array of limiting grooves (23), and the force body (22) is limited by the circumferential array of limiting grooves (23).

3. A novel torque limiter according to claim 2, characterized in that: The acting force body (22) is a compression spring.

4. A novel torque limiter according to claim 3, characterized in that: The sliding body (21) comprises a limiting sleeve (211) at an inner end and a sliding contact body (212) at an outer end, and the limiting sleeve (211) is used for limiting connection of the force body (22).

5. A novel torque limiter according to claim 4, characterized in that: The sliding contact body (212) is a cone, a frustum, a sphere, or an arc, and the engaging recess (24) is matched therewith.

6. A novel torque limiter according to any one of claims 1 to 5, characterized in that: An axis connection hole (25) is provided at the axis center of the rotating inner body (2).

7. A novel torque limiter according to claim 6, characterized in that: The shaft connection hole (25) is a polygonal hole with a keyway, a rectangular hole with a keyway, or a spline hole.

8. A novel torque limiter according to any one of claims 1 to 5, characterized in that: The rotating shell (1) comprises a main shell (11) and a connecting sleeve (12) connected to the main shell (11); a rotating inner body (2) is arranged in the main shell (11); and a connecting piece (13) is provided on the connecting sleeve (12).

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