CN211103783U - Torque control device - Google Patents

Abstract

The utility model provides a torque control device, which comprises a spiral cover, a ratchet wheel, a cam, a control rod, a pusher dog and two elastic mechanisms symmetrically arranged on the peripheral wall of the spiral cover, wherein each elastic mechanism comprises a fastening bolt and a spring; the spring is arranged in the fastening bolt, extends into the chamber and is screwed to control the compression amount of the spring passing through the peripheral wall; the screw cap comprises a first end part and a second end part which are oppositely arranged; the first end part is provided with a port communicated with the chamber; the ratchet wheel is rotationally connected with the second end part; the ratchet wheel is provided with a fixing hole fixed with the outside; one end of the pusher dog is rotatably connected with the second end part, and the other end of the pusher dog is abutted against the ratchet wheel; the two shifting claws are arranged on two sides of the cam, and each shifting claw is abutted with the cam and the spring; the control rod is arranged outside the rotary cover and is rotationally connected with the second end part and fixedly connected with the cam. The utility model discloses a structure of moment of torsion value is predetermine in control output sounds when moment is too big to let the user know and arrive maximum moment, with the protection screw thread.

Description

Torque control device

Technical Field

The utility model relates to the field of machinary, in particular to torque control device.

Background

The existing screw cap is easy to damage threads due to overlarge torque when being fastened, and the problem that the threads are damaged due to the overlarge torque cannot be solved by a simple structure in the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problem that the moment is too big to destroy the screw thread among the prior art. The utility model discloses a structure of moment of torsion value is predetermine in stable, accurate control output, makes a sound when moment is too big to let the user know and reachd maximum moment, with guarantee that the screw fastening just is unlikely to destroy the screw thread because of moment is too big.

In order to solve the technical problem, the utility model provides a torque control device, including the spiral cover, the inside cavity that forms of spiral cover, the internal face of cavity is formed with the screw thread, and the screw thread is used for cooperating its characterized in that with threaded fastener, include: the device comprises a ratchet wheel, a cam, a control rod, a pusher dog and an elastic mechanism; the two elastic mechanisms are symmetrically arranged on the peripheral wall of the spiral cover, and each elastic mechanism comprises a fastening bolt and a spring; the spring is arranged in the fastening bolt and extends to the interior of the chamber through the peripheral wall; the tightening bolt is in threaded connection with the peripheral wall of the screw cap, and the compression amount of the spring penetrating through the peripheral wall is controlled by screwing; the screw cap comprises a first end part and a second end part which are oppositely arranged; the first end part is provided with a through hole which is communicated with the cavity and is used for allowing the threaded fastener to enter the cavity and be matched with the thread of the screw cap; the ratchet wheel, the cam and the pusher dog are arranged in the cavity; the ratchet wheel is rotationally connected with the second end part; one end of the pusher dog is rotatably connected with the second end part, and the other end of the pusher dog is abutted against the ratchet wheel; the two shifting claws are symmetrically arranged on two sides of the cam, one side of each shifting claw, which is close to the cam, is abutted to the cam, and one side of each shifting claw, which is far away from the cam, is abutted to the spring; the control rod is arranged on the outer side of the rotary cover and is rotationally connected with the second end part, and the control rod penetrates through the second end part and is fixedly connected with the cam; when the control rod drives the cam to rotate towards one side, the cam pushes the corresponding pusher dog to separate from the ratchet wheel and approach the elastic mechanism; and one surface of the ratchet wheel facing the first end part is provided with a fixing hole which is used for being matched with an external valve core.

By adopting the scheme, the length of the spring entering the cavity and the achievable compression amount are controlled by adjusting the fastening bolt so as to control the required torque. The control rod is shifted to one side, so that the cam connected with the shifting control rod is deflected to the side, and the shifting claw on the side is pushed to be separated from the ratchet wheel. At the moment, the pusher dog on the other side is tightly attached to the ratchet under the action of the spring of the elastic mechanism. Then the screw cap is rotated, at the moment, the pusher dog on the other side rotates along with the screw cap and clings to the ratchet wheel to drive the ratchet wheel to rotate together. When the input torque value is larger than the set value, the pusher dog on the other side cannot continuously drive the ratchet wheel to rotate, and if the rotary cover is continuously rotated, the pusher dog on the other side can do circumferential motion around the ratchet wheel. Due to the fact that the ratchet wheel is uneven, the pawl can make a snap sound when the ratchet wheel is knocked, and the set torque is reminded to be achieved. The device has compact structure and small volume, does not need tools, and only needs to control the compression amount of the spring by adjusting the position of the fastening bolt when the torque needs to be adjusted so as to achieve the purpose of controlling the output torque, thereby ensuring the thread fastening and avoiding damaging the thread due to overlarge torque.

According to another specific embodiment of the present invention, the torque control device disclosed in the embodiments of the present invention further comprises a guard piece, the guard piece is disposed inside the chamber and located on one side of the ratchet wheel close to the first end portion; and a through hole is formed on the protection sheet, is opposite to the fixing hole and is communicated with the fixing hole, and the through hole is used for allowing an external valve core to pass through the through hole.

By adopting the scheme, the protective sheet is additionally arranged to protect various parts inside.

According to another embodiment of the present invention, a torque control device is disclosed, wherein a flange is formed on an inner wall surface of the screw cap, the flange is located on one side of the screw thread near the second end, and the guard plate is disposed on the flange.

By adopting the scheme, the flange mounting protection piece is arranged, the structure is simple, and the protection piece is stably fixed.

According to the utility model discloses a torque control device, the perisporium of spiral cover still is provided with the locating pin, and the locating pin passes the perisporium and is connected with the bluff piece, and the relative spiral cover of circumference direction of restriction bluff piece at is rotatory.

By adopting the scheme, the protection sheet is clamped by the positioning pin, so that the protection sheet is prevented from falling off.

According to another embodiment of the present invention, a torque control device is disclosed, wherein the pawl and the ratchet are respectively connected to the second end through a bolt.

By adopting the scheme, the bolt is used for rotatably connecting the two parts, so that the two parts can smoothly rotate and are fixed and stable.

According to another embodiment of the present invention, the torque control device disclosed in the embodiments of the present invention further comprises a handle disposed on the control rod.

By adopting the scheme, the control rod can be conveniently adjusted by arranging the handle.

According to the utility model discloses a further embodiment, the utility model discloses a torque control device that embodiment discloses, the one side that each pusher dog is close to elastic mechanism is provided with the draw-in groove to when the pusher dog rotates to with the elastic mechanism butt, elastic mechanism's one end joint in draw-in groove.

By adopting the scheme, the clamping groove is arranged, so that the spring is clamped on the pusher dog, and the spring is conveniently compressed.

According to another embodiment of the present invention, the embodiment of the present invention discloses a torque control device, wherein the cam is welded on the control rod.

By adopting the scheme, the cam is not detachably connected with the control rod, so that the connection is more stable.

The utility model has the advantages that:

through a structure of stably and accurately controlling the output preset torque value, the sound is generated when the torque is too large, so that a user knows that the maximum torque is reached, the thread fastening is ensured, the thread cannot be damaged due to the too large torque, and the problem that the thread is damaged due to the too large torque in the prior art is solved.

Drawings

Fig. 1 is an exploded view of a torque control device in the present embodiment;

fig. 2 is a top perspective view of the torque control device in the present embodiment.

Description of reference numerals:

10: screwing a cover; 11: a first end portion; 12: a second end portion;

110: a chamber; 120: a thread; 130: a flange; 140: positioning pins;

20: a ratchet wheel; 21: a fixing hole; 30: a cam;

40: a control lever;

50: a pusher dog; 51: a left pusher dog; 52: a right pusher dog; 53: a card slot;

60: an elastic mechanism; 61: tightening the bolt; 62: spring

70: a guard sheet; and a through hole 71.

Detailed Description

The following description is provided for illustrative embodiments of the present invention, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. While the invention will be described in conjunction with the preferred embodiments, it is not intended that features of the invention be limited to only those embodiments. On the contrary, the intention of implementing the novel features described in connection with the embodiments is to cover other alternatives or modifications which may be extended based on the claims of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be practiced without these particulars. Furthermore, some of the specific details are omitted from the description so as not to obscure or obscure the present invention. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

It should be noted that in this specification, like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

In the description of the present embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are usually placed in when used, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or the element to which the present invention is directed must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present embodiment, it should be further noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected," and "connected" are to be interpreted broadly, e.g., as a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present embodiment can be understood in specific cases by those of ordinary skill in the art.

In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Examples

In order to solve the above technical problem, the utility model provides a torque control device, as shown in fig. 1 and fig. 2, including spiral cover 10, spiral cover 10 is inside to be formed cavity 110, and the internal face of cavity 110 is formed with screw thread 120, and screw thread 120 is used for cooperating with threaded fastener, and torque control device still includes: ratchet 20, cam 30, control lever 40, finger 50 and elastic mechanism 60; wherein, the elastic mechanism 60 has two, two elastic mechanisms 60 are symmetrically arranged on the peripheral wall of the screw cap 10, each elastic mechanism 60 comprises a fastening bolt 61 and a spring 62; the spring 62 is disposed inside the fastening bolt 61 and extends through the peripheral wall to the inside of the chamber 110; the tightening bolt 61 is screwed with the peripheral wall of the screw cap 10, and controls the amount of compression of the spring 62 through the peripheral wall by tightening; the screw cap 10 comprises a first end 11 and a second end 12 which are oppositely arranged; the first end 11 forms a port that communicates with the chamber 110 for entry of a threaded fastener into the chamber 110 to engage the threads 120 of the screw cap 10; ratchet 20, cam 30 and finger 50 are disposed within chamber 110; and, ratchet 20 is rotatably connected to second end 12; one end of the pusher dog 50 is rotatably connected with the second end portion 12, and the other end abuts against the ratchet 20; moreover, two fingers 50 are provided, and two fingers 50 are symmetrically arranged on both sides of cam 30, and one side of each finger 50 close to cam 30 abuts against cam 30, and one side far from cam 30 abuts against spring 62; the control rod 40 is arranged outside the screw cap 10 and is rotationally connected with the second end part 12, and the control rod 40 passes through the second end part 12 and is fixedly connected with the cam 30; and when the control lever 40 drives the cam 30 to rotate to one side, the cam 30 pushes the corresponding finger 50 to separate from the ratchet 20 and approach the elastic mechanism 60. And a fixing hole 21 is formed on one surface of the ratchet 20 facing the first end portion 11, and the fixing hole 21 is used for being matched with an external valve core.

In particular, the broken lines in fig. 1 are used to indicate relative positions after installation, and not the structure itself. FIG. 2 is a top perspective view of the torque control device, i.e., FIG. 2, taken from the top of the torque control device at the second end 12, with the dashed lines representing the internal structure of the torque control device and the solid lines representing the profile as seen from the top of the second end 12.

It should be understood that the external device protected by the torque control device is the prior art, and the specific structure thereof is not within the protection scope of the present invention, and the detailed description thereof is omitted in this embodiment. However, for the sake of easy understanding, the external device will be briefly described as follows:

the external device has a threaded fastener, a stopper, and a valve core, the threads 120 of the screw cap 10 are engaged with the threaded fastener, and the fixing hole 21 is engaged with the valve core (the external device having the threaded fastener and the valve core is not shown in fig. 1). When the torque control device is mated with an external device, the spool is inserted into the fixing hole 21. With the screwing of the screw cap 10, the valve core moves along the screwing advancing direction of the screw cap 10, when the valve core moves to the blocking part, the valve core cannot move continuously and cannot rotate, at the moment, the ratchet wheel 20 connected with the valve core cannot rotate, and the pusher dog is separated from the tooth surface of the ratchet wheel 20 to make a sound because the pusher dog cannot drive the ratchet wheel 20 any more.

More specifically, the rotational connection between the ratchet 20 and the second end 12, the rotational connection between one end of the finger 50 and the second end 12, and the rotational connection between the control rod 40 disposed outside the screw cap 10 and the second end 12 may be any rotational connection commonly used by those skilled in the art, such as a shaft connection, a snap connection, etc.

The fixed connection of the control rod 40 to the cam 30 through the second end 12 may be a non-detachable connection such as riveting or welding, or a detachable connection such as a threaded connection, a snap connection, etc. The fixing hole 21 may be a square hole, a circular hole, or an irregular hole, and its specific shape is specifically designed according to the shape of the valve element to be connected, which is not specifically limited in the present embodiment. The set screw 61 is provided with the necessary threads or drive notches for facilitating the application of force.

When the screw thread needs to be tightened, clockwise tightening is taken as an example as shown in fig. 1 and 2:

the length of spring 62 entering chamber 110 and the amount of compression that can be achieved is controlled by adjusting set screw 62 to control the torque required.

Toggling the lever 40 to the left deflects the cam 30 connected to the toggle lever 40 to the left and pushes the left finger 51 off the ratchet 20. At this time, the right-hand finger 52 is pressed against the ratchet 20 by the spring 62 of the elastic mechanism 60. It will be appreciated that spring 62 extending into chamber 110 is always in abutment with finger 50 and finger 50 is plucked without disengaging spring 62.

The screw cap 10 is rotated, and at this time, the right finger 52 rotates with the screw cap 10, and the right finger 52 abuts against the ratchet 20 and drives the ratchet 20 to rotate together.

As described above for the external device, the ratchet 20 is connected to the external valve core through the fixing hole 21, the valve core moves in the direction of screwing the cap 10 as the cap 10 is screwed down, when the valve core moves to the blocking portion of the external device, the valve core is blocked by the blocking portion and cannot move or rotate any more, further, the valve core blocks the ratchet 20 to rotate any more with the right-side finger 52, and the resistance from the ratchet 20 causes the right-side finger 52 to compress the spring 62 until the spring 62 cannot compress any more, at which time, the set value of the torque is reached.

When the input torque value for screwing the cap 10 is greater than the set value, the right-side finger 52 cannot continue to drive the ratchet wheel to rotate, and if the cap 10 is rotated continuously, the right-side finger 52 moves circumferentially around the ratchet wheel 20. Due to the fact that the ratchet wheel is uneven, the pawl can make a snap sound when the ratchet wheel is knocked, and the set torque is reminded to be achieved.

It should be understood that the principle and process of counterclockwise rotation are the same as clockwise tightening, and are not described in detail herein.

By adopting the scheme, the device has compact structure and small volume, does not need tools, and only needs to control the compression amount of the spring 62 by adjusting the position of the fastening bolt 61 when the torque is required to be adjusted so as to achieve the purpose of controlling the output torque, thereby ensuring the thread fastening and avoiding damaging the thread due to overlarge torque.

In a preferred embodiment, as shown in fig. 1 and 2, a guard 70 is further included, the guard 70 being disposed inside the chamber 110 on a side of the ratchet 20 adjacent to the first end 11; and, the guard 70 is formed with a through hole 71, the through hole 71 is aligned with the fixing hole 21 and communicates with the fixing hole 21, and the through hole 71 is used for the valve core of the screw fastener to pass through the through hole 71.

Specifically, the protective plate 70 may be fastened to the screw cap 10, or may be screwed or bolted to the screw cap, and the embodiment is not particularly limited.

When the valve core is used, the valve core penetrates through the through hole 71 and is connected with the fixing hole 21 on the ratchet wheel 20, the threaded fastener is matched and fastened with the thread 120, and meanwhile, the protective sheet 70 can limit damage to internal parts when the screwing stroke of the threaded fastener and the thread 120 is too large. The addition of the protective sheet 70 protects various parts inside the chamber 110.

In a preferred embodiment, as shown in fig. 1 and 2, the finger 50 and the ratchet 20 are each rotatably connected to the second end portion 11 by a bolt.

By adopting the scheme, the bolt is used for rotatably connecting the two parts, so that the two parts can smoothly rotate and are fixed and stable.

In a preferred embodiment, as shown in fig. 1 and 2, a flange 130 is formed on the inner wall surface of the screw cap 10, the flange 130 is located on the side of the screw thread 120 close to the second end 12, and the guard plate 70 is disposed on the flange 130.

Specifically, the side of the flange 130 close to the second end 12 of the screw 120 means that, deep in the chamber 110, the screw 120 extends from the first end 11 to the second end 12, the side closest to the second end 12 means a position deep in the chamber 110, and a space close to the second end 12 is used for mounting the ratchet 20, the cam 30 and other parts, and in order to avoid the influence on the parts, the position of the flange 130 needs to be set without occupying the space, and the flange 130 is located deep in the chamber 110 and close to the second end 12.

By adopting the scheme, the flange 130 is arranged to install the protection sheet 70, the structure is simple, and the fixation is stable.

In a preferred embodiment, as shown in fig. 1 and 2, the peripheral wall of the screw cap 10 is further provided with a positioning pin 140, and the positioning pin 140 is connected with the protective sheet 70 through the peripheral wall to limit the rotation of the protective sheet 70 in the circumferential direction relative to the screw cap 10.

It should be understood that the locating pin 140 is cooperatively connected with the guard plate 70, and the guard plate 70 is provided with the necessary pin hole or snap structure.

By adopting the scheme, the protection sheet 70 is clamped by the positioning pin 140, so that the protection sheet 70 is prevented from falling off.

In a preferred embodiment, as shown in FIG. 1, a handle is also provided on the control lever 40.

By adopting the scheme, the control rod 40 can be conveniently adjusted by arranging the handle.

In a preferred embodiment, as shown in fig. 1 and 2, a locking slot 53 is formed on a surface of each finger 50 adjacent to the elastic mechanism 60, and when the finger 50 rotates to abut against the spring 61, one end of the spring 61 is locked in the locking slot 53.

Specifically, catch 53 may be a circular groove such that spring 61 enters into alignment with catch 53, and one end of spring 61 is caught by catch 53 when finger 50 presses against spring 61.

By adopting the scheme, the clamping groove is arranged, so that the spring is clamped on the pusher dog, and the spring is conveniently compressed.

In a preferred embodiment, the cam 30 is welded to the lever 40.

By adopting the scheme, the cam 30 is connected with the control rod 50 in a non-detachable mode, so that the connection is more stable.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a more detailed description of the invention, and the specific embodiments thereof are not to be considered as limiting. Various changes in form and detail, including simple deductions or substitutions, may be made by those skilled in the art without departing from the spirit and scope of the invention.

Claims (8)

1. A torque control device comprising a cap having a cavity formed therein, the interior wall surface of the cavity having threads formed thereon for mating with a threaded fastener, comprising: the device comprises a ratchet wheel, a cam, a control rod, a pusher dog and an elastic mechanism; wherein the content of the first and second substances,

the two elastic mechanisms are symmetrically arranged on the peripheral wall of the rotary cover, and each elastic mechanism comprises a fastening bolt and a spring;

the spring is arranged in the fastening bolt and extends to the interior of the chamber through the peripheral wall;

the fastening bolt is in threaded connection with the peripheral wall of the screw cap, and the compression amount of the spring penetrating through the peripheral wall is controlled by screwing;

the screw cap comprises a first end part and a second end part which are oppositely arranged;

the first end portion forms a through opening which is communicated with the cavity and is used for allowing the threaded fastener to enter the cavity and be matched with the thread of the screw cap;

the ratchet wheel, the cam and the pusher dog are arranged in the cavity; and the number of the first and second electrodes,

the ratchet wheel is rotationally connected with the second end part;

one end of the shifting claw is rotatably connected with the second end part, and the other end of the shifting claw abuts against the ratchet wheel; and the number of the first and second electrodes,

the two shifting claws are symmetrically arranged on two sides of the cam, one side, close to the cam, of each shifting claw is abutted with the cam, and one side, far away from the cam, of each shifting claw is abutted with the spring;

the control rod is arranged outside the rotary cover and is rotationally connected with the second end part, and the control rod penetrates through the second end part and is fixedly connected with the cam; and the number of the first and second groups,

when the control rod drives the cam to rotate towards one side, the cam pushes the corresponding pusher dog to separate from the ratchet wheel and approach the elastic mechanism; and the number of the first and second electrodes,

and one surface of the ratchet wheel facing the first end part is provided with a fixing hole which is used for being matched with an external valve core.

2. The torque control device of claim 1, further comprising a guard disposed inside the chamber on a side of the ratchet proximate the first end; and the number of the first and second electrodes,

the guard plate is provided with a through hole, the through hole is opposite to the fixing hole and is communicated with the fixing hole, and the through hole is used for allowing the valve core to pass through the through hole.

3. The torque control device according to claim 2, wherein a flange is formed on the inner wall surface of the screw cap on a side of the screw thread near the second end portion, and the guard is provided on the flange.

4. The torque control device according to claim 3, wherein a positioning pin is further provided on the peripheral wall of the screw cap, the positioning pin penetrating the peripheral wall to connect with the guard piece, and the guard piece is restricted from rotating relative to the screw cap in a circumferential direction of the screw cap.

5. The torque control device according to claim 1, wherein the pawl and the ratchet wheel are each rotationally coupled to the second end portion by a bolt.

6. The torque control device of claim 1, wherein said lever is further provided with a handle.

7. The torque control device according to claim 1, wherein a locking groove is formed on a surface of each finger adjacent to the elastic mechanism, and when the finger rotates to abut against the spring, one end of the spring is locked in the locking groove.

8. The torque control device of claim 1, wherein the cam is welded to the control rod.

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