CN213541112U - Safety coupling - Google Patents
Safety coupling Download PDFInfo
- Publication number
- CN213541112U CN213541112U CN202021687296.6U CN202021687296U CN213541112U CN 213541112 U CN213541112 U CN 213541112U CN 202021687296 U CN202021687296 U CN 202021687296U CN 213541112 U CN213541112 U CN 213541112U
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- transmission shaft
- coupler
- friction
- coupling
- coupling body
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Abstract
The utility model discloses a safety coupling, include: a coupling body; a drive shaft, one of the end faces of which is in frictional contact with one of the end faces of the coupling body; the fastener comprises a head and a rod, and one end of the rod penetrates through the coupler body and is in threaded connection with one end of the transmission shaft; and the elastic element is sleeved on the rod part of the fastener and compressed between the head part of the fastener and the coupler body. The coupler compresses the transmission shaft and the coupler through the elastic element and keeps constant pressure, so that the transmission shaft and the coupler can be in static friction contact when in normal work, the transmission shaft and the coupler keep a relative static state, the transmission shaft can drive the coupler to rotate together, and the coupler further drives the working mechanism to rotate; during overload, the load borne by the coupler body is larger than the maximum static friction force, the friction between the transmission shaft and the coupler can be changed into dynamic friction, the transmission shaft idles, and the working mechanism stops rotating.
Description
Technical Field
The utility model relates to a shaft coupling technical field, in particular to safety shaft coupling.
Background
Couplings are mechanical parts that can connect the shafts of two different machines to rotate together during the transmission process.
The traditional coupler has no safety protection function, an output shaft of a general power machine can be connected with a working mechanism by virtue of the coupler, but when the load is too large and exceeds a set torque, the working mechanism can be damaged, so that an accident occurs.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a safety coupling can protect operating device's safety at the during operation.
According to the utility model discloses safety coupling, include: a coupling body; a drive shaft, one of the end faces of which is in frictional contact with one of the end faces of the coupling body; the fastener comprises a head and a rod, and one end of the rod penetrates through the coupler body and is in threaded connection with one end of the transmission shaft; and the elastic element is sleeved on the rod part of the fastener and compressed between the head part of the fastener and the coupler body.
The method has the following beneficial effects: the coupler compresses the transmission shaft and the coupler through the elastic element and keeps constant pressure, so that the transmission shaft and the coupler body can be in static friction contact when in normal work, the transmission shaft and the coupler body keep a relative static state, the transmission shaft can drive the coupler body to rotate together, and the coupler body further drives the working mechanism to rotate; when the working mechanism is overloaded, the load borne by the coupler body is greater than the maximum static friction force, the friction between the transmission shaft and the coupler is changed from static friction to dynamic friction, so that the transmission shaft idles, the rotation of the working mechanism is stopped, and the working mechanism is protected.
According to some embodiments of the present invention, one of the end surfaces of the transmission shaft and one of the end surfaces of the coupling body are in frictional contact with each other through a friction member.
According to some embodiments of the invention, the friction member is made of wear plate, the friction member is installed through the cylinder pin on the shaft coupling body.
According to some embodiments of the utility model, the friction member is provided with a plurality ofly, and is a plurality of the friction member along circumference evenly distributed in one of them terminal surface of shaft coupling body.
According to some embodiments of the invention, the fastener is a shoulder screw, the shank portion includes a polished rod portion and a threaded portion, the threaded portion passes through the coupling body and with an end threaded connection of the transmission shaft.
According to some embodiments of the invention, the resilient element is a rectangular spring, the resilient element being sleeved on the shank portion and compressed between the head of the fastener and the coupling.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is a cross-sectional view of fig. 1.
Reference numerals: the coupling comprises a coupling body 1, a transmission shaft 2, a friction piece 3, a fastening piece 4, an elastic element 5 and a cylindrical pin 6.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the present number, and the terms greater than, less than, within, etc. are understood as including the present number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
Referring to fig. 1 and 2, the utility model discloses a safety coupling, including shaft coupling body 1, transmission shaft 2, fastener 4 and elastic element 5.
One end face of the transmission shaft 2 is in friction connection with one end face of the coupling body 1. The end surface of the transmission shaft 2 is in friction contact with the end surface of the coupling body 1.
It is understood that the frictional contact between the transmission shaft 2 and the coupling body 1 may be direct contact between the end surface of the transmission shaft 2 and the end surface of the coupling body 1, or indirect contact.
The fastener 4 comprises a head part and a rod part, one end of the rod part penetrates through the coupler body 1 and is in threaded connection with one end of the transmission shaft 2, and the elastic element 5 is sleeved on the rod part of the fastener 4 and compressed between the head part of the fastener 4 and the coupler body 1. When the coupler works, the end face of the transmission shaft 2 transmits torque to the end face of the coupler body 1 through static friction contact, therefore, the fastener 4 is arranged to be matched with the elastic element 5, and pretightening force is applied to the coupler body 1 through compressing the elastic element 5, so that constant pressure is kept between the coupler body 1 and the transmission shaft 2.
The coupler body 1 compresses the transmission shaft 2 and the coupler body 1 through the elastic element 5 and keeps constant pressure, so that the transmission shaft 2 and the coupler body 1 can be in static friction contact when in normal work, the transmission shaft 2 and the coupler body 1 keep a relative static state, the transmission shaft 2 can drive the coupler body 1 to rotate together, and the coupler body 1 further drives the working mechanism to rotate; when the working mechanism is overloaded, the friction between the transmission shaft and the coupling body 1, which is greater than the maximum static friction force, of the load borne by the coupling body 1 is changed from static friction to dynamic friction, so that the transmission shaft 2 idles, the rotation of the working mechanism is stopped, and the working mechanism is protected.
In some embodiments of the present invention, referring to fig. 2, one of the end surfaces of the transmission shaft 2 and one of the end surfaces of the coupling body 1 are in friction contact with each other through the friction member 3, the friction member 3 is made of a wear-resistant sheet, and the friction member 3 is mounted on the coupling body 1 through the cylindrical pin 6. The wear-resistant plate has a high friction coefficient and can well transmit the torque of the transmission shaft 2 to the coupler body 1.
In some embodiments of the present invention, the friction members 3 are provided in a plurality of numbers, and the friction members 3 are uniformly distributed on one end surface of the coupling body 1 along the circumferential direction. With friction member 3 along circumference evenly distributed, can guarantee that the frictional contact on 1 terminal surface of shaft coupling body and the 2 terminal surfaces of transmission shaft is more abundant, does benefit to the transmission moment of torsion.
In some embodiments of the present invention, referring to fig. 2, the fastening member 4 is a shoulder screw, the rod portion includes a polish rod portion and a threaded portion, the threaded portion passes through the coupler body 1 and is in threaded connection with one end of the transmission shaft 2, the elastic element 5 is a rectangular spring, and the elastic element 5 is sleeved on the polish rod portion and is compressed between the head of the fastening member 4 and the coupler body 1. The head of the fastener 4 is also pushed forward relative to the transmission shaft 2 along with the threaded part of the fastener 4 and the elastic element 5 sleeved on the polished rod part is compressed to a specified length when the threaded part of the fastener 4 is in threaded connection with the transmission shaft 2, and the deformation of the elastic element 5 is constant, so that the pressure on the coupler body 1 is constant, and the maximum static friction force is related to the positive pressure, so that the static friction contact between the transmission shaft 2 and the coupler body 1 can be ensured when the working mechanism works normally, and the sliding friction is realized when the working mechanism is overloaded.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (6)
1. Safety coupling, its characterized in that includes:
a coupling body (1);
a transmission shaft (2), one end face of which is in frictional contact with one end face of the coupling body (1);
the fastening piece (4) comprises a head part and a rod part, and one end of the rod part penetrates through the coupler body (1) and is in threaded connection with one end of the transmission shaft (2);
and the elastic element (5) is sleeved on the rod part of the fastening piece (4) and compressed between the head part of the fastening piece (4) and the coupling body (1).
2. Safety coupling according to claim 1, characterized in that the friction contact between one of the end surfaces of the drive shaft (2) and one of the end surfaces of the coupling body (1) is provided by means of a friction element (3).
3. Safety coupling according to claim 2, characterized in that the friction member (3) is made of a wear plate, the friction member (3) being mounted on the coupling body (1) by means of a cylindrical pin (6).
4. A safety coupling according to claim 3, characterized in that the friction member (3) is provided in a plurality, and the plurality of friction members (3) are evenly distributed in the circumferential direction on one of the end faces of the coupling body (1).
5. Safety coupling according to claim 1, characterized in that the fastening element (4) is a shoulder screw, the shank comprising a polish rod portion and a threaded portion, the threaded portion passing through the coupling body (1) and being in threaded connection with one end of the drive shaft (2).
6. The safety coupling according to claim 5, characterized in that the elastic element (5) is a rectangular spring, the elastic element (5) is sleeved on the smooth rod part and compressed between the head of the fastening element (4) and the coupling body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021687296.6U CN213541112U (en) | 2020-08-13 | 2020-08-13 | Safety coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021687296.6U CN213541112U (en) | 2020-08-13 | 2020-08-13 | Safety coupling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213541112U true CN213541112U (en) | 2021-06-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021687296.6U Active CN213541112U (en) | 2020-08-13 | 2020-08-13 | Safety coupling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213541112U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113788064A (en) * | 2021-10-11 | 2021-12-14 | 枣庄科技职业学院 | Automobile steering device |
-
2020
- 2020-08-13 CN CN202021687296.6U patent/CN213541112U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113788064A (en) * | 2021-10-11 | 2021-12-14 | 枣庄科技职业学院 | Automobile steering device |
| CN113788064B (en) * | 2021-10-11 | 2023-03-14 | 枣庄科技职业学院 | Automobile steering device |
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