CN212959585U

CN212959585U - Flexible clutch

Info

Publication number: CN212959585U
Application number: CN202021875216.XU
Authority: CN
Inventors: 李强; 陈军; 涂高鹏; 夏涛
Original assignee: Sichuan Science City Jiuli Electronics Co ltd
Current assignee: Sichuan Science City Jiuli Electronics Co ltd
Priority date: 2020-09-01
Filing date: 2020-09-01
Publication date: 2021-04-13
Anticipated expiration: 2030-09-01

Abstract

The utility model discloses a flexible clutch structure. Including transmission shaft, internal thread to the convex sliding sleeve of transmission shaft, external screw thread to the protruding floating nut of positioning base and inner wall length be longer than the internal thread of sliding sleeve, be used for the drive floating nut with the positioning pawl of sliding sleeve threaded coupling, be used for making floating nut with the reset spring of the flexible atress of sliding sleeve, the spacing ring that is used for injecing floating nut dead center position. When the positioning claw is completely closed, the external thread of the floating nut is not in contact with the inner wall of the sliding sleeve, the transmission shaft does not influence the state of the positioning claw in forward rotation or reverse rotation, the reset spring can prevent the internal thread of the sliding sleeve from colliding with the external thread of the floating nut, a buffer distance is provided, coupling is facilitated, and the purpose of flexibility is achieved.

Description

Flexible clutch

Technical Field

The utility model relates to an oil field oil recovery technical field especially relates to a flexible clutch.

Background

The clutch is used for cutting off or transmitting power output by the engine, is arranged between the engine and the transmission and is an assembly directly connected with the engine in a power train of the automobile. The existing clutches are divided into electromagnetic clutches, magnetic powder clutches, friction clutches and hydraulic clutches.

The thread slipping structure in the existing oil field tool can not enable the transmission shaft to be in a forward and reverse rotation condition without influencing the opening state of the positioning claw, the transmission shaft can only rotate forward or can only rotate reversely, and the floating nut and the sliding sleeve can not smoothly realize thread coupling, so that the existing oil field oil extraction technology is limited. Therefore, the development of the structure suitable for the current technical requirements has more important significance and application prospect.

SUMMERY OF THE UTILITY MODEL

To the problem that the transmission shaft can not just rotate under the locating pawl open mode and floating nut and the unable smooth coupling of sliding sleeve among the above-mentioned prior art, the utility model provides a flexible clutch, this flexible clutch have not only avoided can corotation or reversal problem for not influencing the locating pawl open mode, but also can realize the coupling back separation and the coupling after the separation of floating nut and sliding sleeve.

The technical means of the utility model is as follows, a flexible clutch, including set up in the centre bore of the positioning base and can be around the rotatory transmission shaft of self axis, still include the reset spring, nut, sliding sleeve that set up on the transmission shaft, the said nut is coaxial with the said transmission shaft and can rotate synchronously, the said nut can be slipped along the said transmission shaft; the driving part drives the driving part of the sliding sleeve to realize the sliding of the sliding sleeve towards the nut direction; the outer side of the nut is provided with an external thread, one side of the sliding sleeve, which is close to the nut, is provided with an internal thread, the external thread and the internal thread can be coupled, the internal thread protrudes relative to the inner wall surface of the sliding sleeve, and the length of the inner wall, which is positioned at one end of the internal thread, which is close to the driving part, on the sliding sleeve is greater than or equal to that of the external thread; the transmission shaft is also provided with a limiting device used for limiting the stop point position of the nut sliding to the side where the driving piece is located; the reset spring is used for providing a barrier for the nut to slide towards the side far away from the positioning claw through self elastic compression; in the axis direction of the transmission shaft, the reset spring, the nut, the sliding sleeve and the driving part are sequentially arranged.

In this scheme, set up to drive unit is the locating pawl, drive division on the sliding sleeve is a groove, and the groove face of cell body is in proper order respectively: the first side face and the second side face are inclined faces, the groove body is an inclined face groove with an opening width larger than the width of the bottom side due to the inclined faces, the bottom face is parallel to the axis of the transmission shaft, and the positioning claw is provided with a torsion spring. In the working process of the flexible clutch, when the torsion spring is opened, when the positioning claw is in an open state, the rear inclined surface of the positioning claw is matched with the first side surface of the sliding sleeve, when external force enables the positioning claw to be folded, the sliding sleeve slides towards the floating nut on the transmission shaft, when the sliding sleeve is in contact with the thread of the floating nut, the sliding sleeve cannot rotate, the left end of the floating nut is provided with a return spring, the sliding sleeve pushes the floating spring for a certain distance, so that the external thread of the floating nut can be coupled with the internal thread of the sliding sleeve, the motor drives the transmission shaft to rotate, the external thread of the floating nut is coupled with the internal thread of the sliding sleeve until the external thread of the floating nut slides into the inner wall of the sliding sleeve and is not in contact with the sliding sleeve, and the second side surface of the sliding sleeve is matched with the front inclined surface of the positioning claw, so that the positioning claw is folded. At this time, no matter the transmission shaft rotates forwards or backwards, the state of the positioning claw is not influenced because the floating nut is not in contact with the sliding sleeve. When the torsion spring loosens, the preceding inclined plane of locating pawl to the second side of sliding sleeve has the effect of locating pawl direction, the sliding sleeve slides the back, the internal thread of sliding sleeve with the external screw thread of floating nut again contacts and aligns at the screw thread under reset spring's effect, rotates the transmission shaft this moment, begins to separate after the thread coupling, the first inclined plane of sliding sleeve begins the back inclined plane of locating pawl has the thrust of keeping away from the floating nut direction makes the locating pawl opens again.

The preferable scheme is as follows: the limiting device is a limiting ring, the limiting ring is fixed on the transmission shaft through a set screw, and a sliding sleeve spring is further arranged on the part, located inside the positioning base, of the sliding sleeve.

The further technical scheme is as follows:

after the positioning claw is furled, the internal thread of the sliding sleeve is coupled with the external thread of the floating nut, the external thread of the floating nut is arranged in the inner wall of the sliding sleeve, the floating nut loses the pushing force of the sliding sleeve to the reset spring, and then the sliding sleeve can continue to slide in the direction of the positioning claw under the action of the reset spring, and the limiting ring plays a role in limiting the floating nut. When the locating pawl opens, the internal thread of sliding sleeve is right reset spring's external screw thread has the pulling force effect, floating nut continues to slide to the sliding sleeve direction, and the spacing ring plays limiting displacement and lets the internal thread of sliding sleeve with floating nut's external screw thread keeps the distance. The sliding sleeve is provided with a sliding sleeve spring outside, so that one end of the sliding sleeve outside the positioning base is connected with the positioning claw more tightly.

The beneficial effects of the utility model are that:

the scheme mainly realizes the transmission and disconnection of power, and particularly, when the positioning claw is closed under the action of external force, the flexible clutch is not in contact with an external transmission device, so that the transmission of the power is disconnected. When the positioning claws are opened, the positioning claws have the function of friction force on the external transmission device, so that the external transmission device moves under the action of the friction force to realize the transmission of the power. When the positioning claw is closed, the external thread of the floating nut is completely coupled with the internal thread of the sliding sleeve, the sliding sleeve continues to slide towards the direction of the reset spring under the action of the positioning claw, when the front inclined surface of the positioning claw is matched with the second side surface of the sliding sleeve, the external nut of the floating nut is positioned in the inner wall of the sliding sleeve and is not in contact with the inner wall, and the state of the positioning claw is not influenced no matter the transmission shaft rotates forwards or reversely at the moment.

The left end of the floating nut is provided with a reset spring, when the sliding sleeve is right when the floating nut has a pushing effect, the reset spring is used for providing a barrier for the floating nut to slide away from the side where the positioning claw is located through self elasticity compression, and a buffer section can be formed, so that the external thread of the floating nut and the internal thread of the sliding sleeve align to the thread before the internal thread of the sliding sleeve starts to be coupled and play a flexible role, and the floating nut and the direct collision between the sliding sleeves are prevented.

The limiting ring is arranged at the right end of the floating nut, so that the floating nut can be prevented from continuously sliding under the condition that the positioning claws are completely opened and completely closed.

Drawings

Fig. 1 is a schematic structural view of a specific embodiment of the flexible clutch according to the present invention, wherein the upper side of the center line of the transmission shaft is a state in which the positioning pawl is fully opened, the lower side of the center line of the transmission shaft is a state in which the positioning pawl is fully closed, and the dotted line in the drawing indicates a moving state of the positioning pawl during a retracting process.

In fig. 1, the labels are: 1. the device comprises a transmission shaft, 2, a sealing ring, 3, a positioning base, 4, a nut spring backing ring, 5, a sliding sleeve reset spring, 6, a reset spring, 7, a nut, 8, a sliding sleeve, 9, a set screw, 10, a limiting ring, 11, a positioning claw, 12, a torsion spring, 13 and a positioning claw shaft.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments, but the structure of the present invention is not limited to the following embodiments:

example 1:

a flexible clutch comprises a transmission shaft 1 which is arranged in a central hole of a positioning base 3 and can rotate around the axis of the transmission shaft, a reset spring 6, a nut 7 and a sliding sleeve 8, wherein the reset spring 6, the nut 7 and the transmission shaft 1 are sleeved with each other, the nut 7 and the transmission shaft 1 are coaxial and can synchronously rotate, and the nut 7 can slide along the transmission shaft 1; the nut is characterized by further comprising a driving component for driving the sliding sleeve 8 to slide towards the nut 7, wherein the driving component drives a driving part of the sliding sleeve 8 to realize the sliding of the sliding sleeve 8 towards the nut 7; an external thread is arranged on the outer side of the nut 7, an internal thread is arranged on one side, close to the nut 7, of the sliding sleeve 8, the external thread and the internal thread can be coupled, the internal thread protrudes relative to the inner wall surface of the sliding sleeve 8, and the length of the inner wall, located at one end, close to the driving part, of the internal thread is larger than or equal to that of the external thread on the sliding sleeve 8; the transmission shaft 1 is also provided with a limiting device for limiting the stop point position of the nut 7 sliding to the side where the driving piece is located; the return spring 6 is used for providing a barrier for the nut 7 to slide away from the side where the positioning claw 11 is located through self elastic compression; in the axial direction of the transmission shaft 1, the reset spring 6, the nut 7, the sliding sleeve 8 and the driving part are sequentially arranged.

In this scheme, set up to drive part is positioning pawl 11, the last drive division of sliding sleeve 8 is a groove, and the groove face of cell body is in proper order respectively: the transmission shaft comprises a first side surface, a bottom surface and a second side surface, wherein the first side surface and the second side surface are inclined surfaces, the groove bodies are inclined surface grooves with opening widths larger than the width of the bottom side by the inclined surfaces, the bottom surface is parallel to the axis of the transmission shaft 1, and the transmission shaft further comprises a torsion spring 12 arranged on a positioning claw 11. In the working process of the flexible clutch, when the torsion spring 12 is opened, when the positioning pawl 11 is in an open state, the rear inclined surface of the positioning pawl 11 is matched with the first side surface of the sliding sleeve 8, when external force causes the positioning pawl 11 to be folded, the sliding sleeve 8 slides towards the floating nut direction on the transmission shaft 1, when the sliding sleeve 8 is in contact with the thread of the floating nut, because the sliding sleeve 8 can not rotate, the reset spring 6 is installed at the left end of the floating nut, the sliding sleeve pushes the reset spring 6 for a certain distance, the external thread of the floating nut and the internal thread of the sliding sleeve 8 can be in coupling, at the moment, the motor drives the transmission shaft 1 to rotate, the external thread of the floating nut is in coupling with the internal thread of the sliding sleeve 8 until the external thread of the floating nut slides into the inner wall of the sliding sleeve 8 and does not contact with the sliding sleeve 8, at this time, the second side surface of the sliding sleeve 8 is matched with the front inclined surface of the positioning pawl 11, so that the positioning pawl 11 is folded. At this time, no matter the transmission shaft 1 rotates forwards or backwards, the state of the positioning claw 11 is not influenced because the floating nut is not in contact with the sliding sleeve 8. When the torsion spring 12 is loosened, the front inclined plane of the positioning claw 11 faces the second side face of the sliding sleeve 8 and acts on the force in the direction of the positioning claw 11, after the sliding sleeve 8 slides, the internal thread of the sliding sleeve 8 and the external thread of the floating nut are contacted again and aligned in the thread under the action of the reset spring 6, at the moment, the transmission shaft 1 is rotated, the separation is started after the thread coupling, the first inclined plane of the sliding sleeve 8 starts from the rear inclined plane of the positioning claw 11 and has the thrust far away from the direction of the floating nut, and the positioning claw 11 is opened again.

The preferable scheme is as follows: the limiting device is a limiting ring 10, the limiting ring 10 is fixed on the transmission shaft 1 through a set screw 9, and a sliding sleeve spring is further arranged on the part, located inside the positioning base 3, of the sliding sleeve 8.

The further technical scheme is as follows:

after the positioning claw 11 is furled, the internal thread of the sliding sleeve 8 is coupled with the external thread of the floating nut, the external thread of the floating nut is arranged in the inner wall of the sliding sleeve 8, the floating nut loses the pushing force of the sliding sleeve 8 to the reset spring 6, then the floating nut can continue to slide in the direction of the positioning claw 11 under the action of the reset spring 6, and the limiting ring 10 plays a role in limiting the floating nut. When the positioning claw 11 is opened, the internal thread of the sliding sleeve 8 has a pulling force effect on the external thread of the reset spring 6, the floating nut continues to slide towards the direction of the sliding sleeve 8, and the limiting ring 11 plays a limiting role at the moment to enable the internal thread of the sliding sleeve 8 to keep a distance with the external thread of the floating nut. The sliding sleeve spring is arranged outside the sliding sleeve 8, so that one end of the sliding sleeve 8 outside the positioning base 3 is connected with the positioning claw 11 more tightly.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments thereof. To the utility model belongs to the technical field of the ordinary technical personnel, do not deviate from the utility model discloses a technical scheme under the other embodiments that reach all should contain in corresponding utility model's protection scope.

Claims

1. The flexible clutch is characterized by comprising a transmission shaft (1) which is arranged in a center hole of a positioning base (3) and can rotate around the axis of the transmission shaft, a reset spring (6), a nut (7) and a sliding sleeve (8) which are sleeved on the transmission shaft (1), wherein the nut (7) is coaxial with the transmission shaft (1) and can synchronously rotate, and the nut (7) can slide along the transmission shaft (1); the driving part is used for driving the sliding sleeve (8) to slide towards the nut (7), and the driving part drives the driving part of the sliding sleeve to realize the sliding of the sliding sleeve (8) towards the nut (7); the outer side of the nut (7) is provided with an external thread, one side of the sliding sleeve (8) close to the nut (7) is provided with an internal thread, the external thread and the internal thread can be coupled, the internal thread is convex relative to the inner wall surface of the sliding sleeve (8), and the length of the inner wall of the sliding sleeve (8) at one end of the internal thread close to the driving part is greater than or equal to that of the external thread; the transmission shaft (1) is also provided with a limiting device for limiting the stop point position of the nut (7) sliding to the side where the driving piece is located; the return spring (6) is used for providing a barrier for the nut (7) to slide towards the side far away from the sliding sleeve (8) through self elastic compression; in the axial direction of the transmission shaft (1), the reset spring (6), the nut (7), the sliding sleeve (8) and the driving part are sequentially arranged.

2. A flexible clutch according to claim 1, characterized in that the drive member is a dog (11) which is hinged to the positioning base (3) by a dog shaft (13).

3. A flexible clutch according to claim 2, characterized in that the nut (7) is a floating nut.

4. The flexible clutch according to claim 3, wherein the outer wall surface of the sliding sleeve (8) on the side away from the floating nut is further provided with a driving part, the driving part is a groove body, and along the axial direction of the transmission shaft (1), the groove surfaces of the groove body are respectively: the transmission shaft comprises a first side surface, a bottom surface and a second side surface, wherein the first side surface and the second side surface are inclined surfaces, the groove body is an inclined surface groove with an opening width larger than the bottom side width due to the inclined surfaces, and the bottom surface is parallel to the axis of the transmission shaft (1); the matching position of the positioning claw (11) on the sliding sleeve (8) is positioned in the groove body: when the positioning claw (11) rotates around the positioning claw shaft (13), the positioning claw (11) forces the sliding sleeve (8) to move towards the side of the floating nut by pressing one of the first side surface and the second side surface close to the floating nut, and when the sliding sleeve (8) moves towards the side far away from the floating nut, the other one of the first side surface and the second side surface forces the positioning claw (11) to overturn to be parallel to the transmission shaft (1).

5. A flexible clutch according to any one of claims 1 to 4, characterized in that the limiting means is a limiting ring fixed to the transmission shaft (1) by means of a set screw (9).