CN212351796U - Adjustable torque force-limiting spanner for loading and unloading ultrasonic medical equipment working tip - Google Patents

Abstract

The utility model discloses an adjustable torque force-limiting wrench for loading and unloading ultrasonic medical equipment working tips, wherein a holding component comprises a wrench upper cover and a rotating shaft arranged in the wrench upper cover, the upper part of the rotating shaft and the wrench upper cover are of a conjoined structure or the upper part of the rotating shaft is connected with the wrench upper cover through a clamping and embedding structure; the clamping component comprises a chuck which is coaxially arranged with the lower wrench shell and the shell bottom of the lower wrench shell through a clamping and embedding structure, and the shell top of the lower wrench shell is coaxially provided with a rotating shaft hole; the torque transmission assembly comprises pawls and ratchets which are correspondingly arranged, the ratchets are uniformly distributed at the top of a shell of the lower wrench shell around the circumference of a rotating shaft hole, and the pawls which return downwards are uniformly distributed on the shaft body of the rotating shaft; the lower part of the rotating shaft is assembled in the rotating shaft hole and is axially limited at the top of the shell of the lower shell of the wrench through sleeving gaskets with different thicknesses and clamped split washers, and the pawls act on the ratchets through different elastic deformations at different axial limiting positions of the rotating shaft to transmit different torques.

Description

Adjustable torque force-limiting spanner for loading and unloading ultrasonic medical equipment working tip

Technical Field

The utility model relates to a dental appliance matching device, in particular to an adjustable torque force-limiting wrench for loading and unloading an ultrasonic medical equipment working tip.

Background

The ultrasonic medical equipment comprises an ultrasonic tooth cleaner, an ultrasonic bone knife machine and the like, and realizes the specific functions of removing stains, tartar or osteotomy and the like on the surface of the tooth by a physical method through the contact of a working tip of ultrasonic vibration and a working surface. The working tip is arranged on a handle of the ultrasonic medical equipment through threads (internal threads or external threads), the rear part of the working tip is generally a cylinder, and a wrench position is arranged on the cylinder, so that a tool can be conveniently used for screwing, assembling and disassembling.

In order to accommodate different functional requirements, the tip often needs to be removed from the handle for replacement. When installing and removing the work point, if with ordinary pliers, very easily scratch and abrade the work point step, and also can make the work point revolve too tightly or too pine because of the not good dynamics of control, too tightly can influence the dismantlement of work point, perhaps damage work point or handle even, the work point normal work can be influenced again to the pine, in order to guarantee that user in use can load and unload the work point effectively, close the installation soon and need use the limit wrench usually, carry out reasonable and effectual control to the dynamics of loading and unloading work point.

The following are several structures that are common in the existing tip force-limiting wrenches:

a structure includes three main parts: shell, torsion spring and core. The inner core body is hooped by a torsion spring with the counterclockwise rotation direction, the extending end of the spring is assembled with an eccentric hole or a groove of the shell, no relative rotation between the spring and the shell is ensured, so that when the shell rotates clockwise relative to the core body, the friction force between the core body and the spring provides the torque required by screwing the working tip, the assembly mode of the structure is shown in Chinese patent invention CN 207104786U, namely force limiting wrench for assembling and disassembling the working tip of ultrasonic tooth cleaning equipment, and the structure determines that the torque cannot be adjusted.

Another construction includes two main parts: when the shell with the radial inner ratchet wheel and the elastic body with the radial outer pawl rotate relatively, the outer pawl of the elastic body deforms and is tightly pressed on ratchet wheel teeth of the shell to generate friction force, so that torque required for screwing the working tip is provided, but the structure cannot adjust the torque because the deformation amount of the outer pawl of the elastic body cannot be adjusted, and the assembly mode of the structure is shown in Chinese invention patent with publication number CN 207104783U, force limiting wrench for assembling and disassembling the working tip of the ultrasonic tooth cleaning equipment and Chinese invention patent with publication number CN202498483U, force limiting wrench for assembling and disassembling the working tip of a bone knife machine.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the prior art is not enough, the utility model provides a moment is screwed up to adjustable work point adjustable torque force limiting spanner for loading and unloading ultrasonic medical equipment work point of moment is proposed.

The adjustable torque force-limiting wrench for assembling and disassembling the ultrasonic medical equipment working tip, which can solve the technical problems, comprises a holding component and a clamping component which can rotate relatively, wherein a torque transmission component is arranged between the rotating surfaces of the holding component and the clamping component, and the difference is as follows:

1. the holding component comprises a wrench upper cover and a rotating shaft coaxially arranged in the wrench upper cover, and the upper part of the rotating shaft and the wrench upper cover are of a connected structure or the upper part of the rotating shaft is connected with the wrench upper cover through a clamping and embedding structure.

2. The screens subassembly includes the spanner inferior valve and passes through the dop of inlay card structure coaxial arrangement at the bottom of the shell of spanner inferior valve, the rotation shaft hole has been seted up to the shell top of spanner inferior valve is coaxial.

3. The torque transmission assembly comprises a pawl and ratchets which are correspondingly arranged, the ratchets are uniformly distributed on the top of the shell of the lower wrench shell around the circumference of the rotating shaft hole, and the pawl which rebounds downwards is uniformly distributed on the shaft body of the rotating shaft.

4. The lower part of the rotating shaft is assembled in the rotating shaft hole and is axially limited at the top of the shell of the lower wrench shell through sleeved washers with different thicknesses and clamped split washers, and the pawls act on the ratchets through different elastic deformations at different axial limiting positions of the rotating shaft to transmit different torques.

Conventionally, the number of the pawls is designed to be 3 to 8.

Further, the number of the ratchets is 2-6 times of the number of the pawls.

In an optimized scheme, one end of each ratchet is a wedge-shaped block, the pawl is bent downwards at the edge of the elastic ring plate, the downward bending angle of the pawl is consistent with the wedge-shaped angle of the ratchet, and the elastic ring plate and the rotating shaft are of an integral structure or the elastic ring plate and the rotating shaft are coaxially and fixedly arranged.

Preferably, the elastic ring plate is made of plastic or stainless steel materials.

The utility model has the advantages that:

1. the utility model discloses in loading and unloading supersound medical equipment adjustable torque limit force spanner for work point's structure, the resilience volume of pawl is changed through the packing ring that uses different thickness to obtain different output torque, with the different requirements of adaptation various work points to tightening torque.

2. The utility model discloses simple structure, the equipment is convenient, long service life.

Drawings

Fig. 1 is a front view of one embodiment of the present invention.

Fig. 2 is an exploded view of the embodiment of fig. 1.

And (3) identifying the figure number: 1. the upper cover of the wrench; 2. a rotating shaft; 3. a lower shell of the wrench; 4. clamping a head; 5. rotating the shaft hole; 6. a ratchet; 7. a pawl; 8. a gasket; 9. a split washer; 10. an elastic ring plate; 11. and an annular clamping groove.

Detailed Description

The technical solution of the present invention will be further explained with reference to the embodiments shown in the drawings.

The utility model discloses loading and unloading supersound medical equipment is adjustable moment power wrench for work point, including upper and lower coaxial swivelling joint's the handle subassembly and screens subassembly, be equipped with the moment of torsion transmission subassembly between the rolling plane of handle subassembly and screens subassembly.

The screens subassembly includes spanner inferior valve 3, spanner inferior valve 3 is including locating the shell top and the shell bottom of casing upper and lower mouth, and the dop 4 (side direction screens work point is used) has been equipped with to the card in the bayonet socket of the shell bottom central authorities of spanner inferior valve 3, and the shell top central authorities of spanner inferior valve 3 have seted up and have rotated shaft hole 5, as shown in fig. 1, fig. 2.

The holding assembly comprises an upper wrench cover 1 and a rotating shaft 2, the upper opening of the cover body of the upper wrench cover 1 is closed, the lower opening of the cover body is open, the rotating shaft 2 is coaxially arranged in the cover body of the upper wrench cover 1, the upper part of the rotating shaft 2 is connected with the bottom of the closed end of the cover body in a clamping and embedding manner, the lower end of the rotating shaft 2 is provided with an annular clamping groove 11, an elastic ring plate 10 is integrally manufactured or fixedly arranged on a shaft body in the middle of the rotating shaft 2, three arc-shaped notches are uniformly distributed on the circumference of the elastic ring plate 10, and three arc-shaped strips are formed on the edge of the elastic ring plate 10.

The torque transmission assembly comprises three pawls 7 and three ratchets 6 which are matched with each other at the upper and lower positions, wherein the pawls 7 are respectively formed on each arc-shaped strip, and the forming mode of each pawl 7 is as follows: breaking each arc-shaped strip along the radial direction, and bending the broken end of each arc-shaped strip downwards by an angle; the ratchet 6 is arranged into 12 square blocks, the 12 ratchet 6 is uniformly distributed at the top of the lower wrench shell 3 around the circumference of the rotating shaft hole 5, and one end of each ratchet 6 is a wedge with the gradient consistent with the downward bending angle of the pawl 7, as shown in fig. 1 and 2.

The lower part of the rotating shaft 2 is assembled and penetrates through a rotating shaft hole 5 at the shell top of a lower wrench shell 3, an upper wrench cover 1 covers the shell top of the lower wrench shell 3, a gasket 8 is sleeved on the rotating shaft 2 from the bottom of the shell top of the lower wrench shell 3, a split washer 9 is clamped in a ring-shaped clamping groove 11 at the lower end of the rotating shaft 2 to realize axial limiting of the rotating shaft 2, three pawls 7 act on wedge-shaped surfaces of corresponding ratchets 6 through certain elastic deformation at the axial limiting position of the rotating shaft 2, and acting forces of the pawls 7 on the ratchets 6 can be adjusted by sleeving the gaskets 8 with different thicknesses so as to generate ratchet friction forces with different sizes, so that different torques can be transmitted between the pawls 7 and the ratchets 6, as shown in fig. 1.

The elastic annular plate 10 is made of plastic or stainless steel materials, if the elastic annular plate 10 is a plastic plate, the rotating shaft 2 is a metal insert, and the elastic annular plate 10 and the rotating shaft 2 are integrally injection-molded; if the elastic ring plate 10 is a stainless steel plate, the elastic ring plate 10 and the rotating shaft 2 are integrally formed.

The following describes the application method of the present invention with reference to fig. 1 and 2:

when the upper wrench cover 1 rotates clockwise relative to the lower wrench cover 3, the three pawls 7 elastically deform corresponding to the ratchets 6 and transmit torque through friction force, the deformation of the pawls 7 determines the torque, and the torque is adjusted by using washers 8 with different thicknesses.

When the clamping head 4 of the lower wrench shell 3 screws the working tip to a certain degree, the deformation of the pawl 7 reaches the maximum and slides over the ratchet 6, and the upper wrench cover 1 and the lower wrench shell 3 idle, so that the situations of over-tightening and over-loosening during the screwing of the working tip are avoided.

When the working tip is unscrewed, the upper cover 1 of the wrench rotates anticlockwise, the pawl 7 is clamped at the other end of the wedge-shaped surface of the corresponding ratchet 6 to stop, and the working tip is convenient to unscrew.

Claims (5)

1. Load and unload supersound medical equipment adjustable moment limit force spanner for work point, including the relative pivoted handle subassembly and screens subassembly, be equipped with torque transmission subassembly, its characterized in that between the rolling plane of handle subassembly and screens subassembly:

the holding component comprises a wrench upper cover (1) and a rotating shaft (2) coaxially arranged in the wrench upper cover (1), the upper part of the rotating shaft (2) and the wrench upper cover (1) are of a connected structure or the upper part of the rotating shaft (2) is connected with the wrench upper cover (1) through a clamping and embedding structure;

the clamping assembly comprises a lower wrench shell (3) and a clamping head (4) which is coaxially mounted at the shell bottom of the lower wrench shell (3) through a clamping and embedding structure, and a rotating shaft hole (5) is coaxially formed in the shell top of the lower wrench shell (3);

the torque transmission assembly comprises pawls (7) and ratchets (6) which are correspondingly arranged, the ratchets (6) are uniformly distributed at the top of the lower wrench shell (3) around the circumference of the rotating shaft hole (5), and the pawls (7) which return downwards are uniformly distributed on the shaft body of the rotating shaft (2);

the lower part of the rotating shaft (2) is assembled in the rotating shaft hole (5) and is axially limited at the top of the wrench lower shell (3) through a gasket (8) with different thicknesses and a clamped split washer (9), and the pawl (7) acts on the ratchet (6) through different elastic deformation at different axial limiting positions of the rotating shaft (2) to transmit different torques.

2. The adjustable torque wrench for loading and unloading an ultrasonic medical device tip of claim 1, wherein: the number of the pawls (7) is 3-8.

3. The adjustable torque wrench for handling an ultrasonic medical device tip as recited in claim 2, further comprising: the number of the ratchets (6) is 2-6 times of that of the pawls (7).

4. The adjustable torque force limiting wrench for the loading and unloading ultrasonic medical equipment working tip as recited in any one of claims 1 to 3, wherein: the ratchet (6) is a square block with one wedge-shaped side, the pawl (7) bends downwards at the edge of the elastic ring plate (10), the downward bending angle of the pawl (7) is consistent with the wedge-shaped angle of the ratchet (6), and the elastic ring plate (10) and the rotating shaft (2) are of an integral structure or the elastic ring plate (10) and the rotating shaft (2) are coaxially and fixedly installed.

5. The adjustable torque wrench for handling an ultrasonic medical device tip as recited in claim 4, further comprising: the elastic ring plate (10) is a plastic plate or a stainless steel plate.

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