CN218356416U - Disconnected spanner of moment of torsion adjustable - Google Patents

Abstract

The invention discloses a break-away wrench with adjustable torque. Including head and the handle that links to each other, the head includes the ratchet and installs the square tenon in the ratchet inside, be provided with the spring holder in the handle, the one end of spring holder can stretch into between two adjacent teeth of ratchet, be provided with elastic component on the spring holder, the handle has a knob through threaded connection, the knob is compressible elastic component. According to the wrench, the knob is screwed, the knob adjusts the torque value through the compression spring assembly, and the screwing position of the knob can be selected as required. When the moment of torsion reaches the default, continue to rotate the spanner, spring holder head end and ratchet disconnection, the spanner can not provide bigger moment of torsion, can effectively avoid leading to the moment of torsion too big risk that causes the damage to the planting body when continuing to rotate the spanner owing to careless.

Description

Disconnected spanner of moment of torsion adjustable

Technical Field

The invention relates to a disconnected wrench with adjustable torque, belonging to the technical field of medical instruments.

Background

The dental implant wrench is used in a dental implant procedure. In the process of implanting the tooth, the implant needs to be rotated and planted into the oral cavity by a dental implant wrench to fix the implant. The torque requirements of implants produced by different implant manufacturers are different, so that the dental implant wrench is required to provide torques with different sizes so as to meet the torque requirements of the implants of different manufacturers. Although some common dental implanting wrenches in the market can provide torques of different sizes, the torque is mainly determined by observation or hand feeling of a doctor during use, and the possibility of larger or smaller torque exists. Some wrenches can remind when the target torque is reached, but if the wrenches are not used, the wrenches can continue to provide larger torque and possibly bring the risk of damage to the implant.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a break-away wrench with adjustable torque, which can adjust the torque and break when reaching the preset torque so as to prevent the torque from being too large caused by continuing to rotate the wrench.

The invention is realized by the following technical scheme:

the utility model provides a moment of torsion adjustable disconnect-type spanner, includes continuous head and handle, the head includes the ratchet and installs the square tenon inside the ratchet, be provided with the spring holder in the handle, the one end of spring holder can stretch into between two adjacent teeth of ratchet, be provided with elastic component on the spring holder, the handle has a knob through threaded connection, the knob is compressible elastic component.

The torque-adjustable break-away wrench is characterized in that a groove is formed in the outer peripheral surface of the square tenon, and a ratchet pin is arranged in the groove.

The disconnected spanner of moment of torsion adjustable, the groove is provided with three, evenly distributed is at the outer peripheral face of square tenon, just the groove is the chute.

The disconnected wrench with the adjustable torque is characterized in that an observation hole is formed in the surface of the handle, a mark line is arranged at a position, corresponding to the observation hole, of the knob, and scale marks are arranged above or below the observation hole.

The torque-adjustable break-away wrench comprises a knob, a handle and a handle, wherein the knob comprises a first part positioned inside the handle and a second part positioned outside the handle.

One end of the spring seat is a spherical surface.

The disconnected spanner of moment of torsion adjustable, the spring holder includes syllogic step axle main part, elastic component sets up the other end at syllogic step axle main part.

The disconnected spanner with adjustable torque is characterized in that a ratchet wheel cover is arranged outside the ratchet wheel and connected with the handle.

The torque-adjustable break-away wrench is characterized in that the surfaces of the ratchet cover, the handle and the knob are subjected to sand blasting treatment.

The disconnected spanner with adjustable torque is characterized in that the handle is provided with a use mark and a rotating mark.

An application of a torque-adjustable break-away wrench is applied to dental implantation and used for tightening an implant. The using method comprises the following steps: the spanner is rotated according to the arrow mark direction by making the IN surface on the spanner look at the user, at the moment, the square tenon 4 and the ratchet wheel 1 drive the planting screw to rotate together, the planting body is screwed, the spanner is rotated IN the opposite direction, and the spanner slips. When the wrench is turned over, the OUT surface of the wrench is in front view of a user, the wrench is rotated in the direction indicated by the arrow, the wrench is unscrewed, the wrench is rotated in the opposite direction, and the wrench slips.

The invention achieves the following beneficial effects:

according to the wrench, the knob is screwed, the torque value is adjusted by the knob through the compression spring assembly, and the screwing position of the knob can be selected according to requirements. When the moment of torsion reaches the default, continue to rotate the spanner, spring holder head end and ratchet disconnection, the spanner can not provide bigger moment of torsion, can effectively avoid leading to the moment of torsion too big risk that causes the damage to the planting body when continuing to rotate the spanner owing to careless.

The wrench realizes one-way locking and reverse slipping of the wrench between the square tenon and the ratchet wheel through the ratchet wheel pin.

The wrench of the invention improves the accuracy of the torque value by the torque scale line on the knob corresponding to the torque scale value on the handle.

Drawings

FIG. 1 is a schematic diagram of the present invention.

Fig. 2 is a schematic structural view of another aspect of the present invention.

Fig. 3 is a schematic view of the structure of the observation hole on the handle.

FIG. 4 is a schematic view of the head end of the spring seat and the ratchet wheel as the wrench is rotated during tightening with the wrench.

FIG. 5 is a schematic view of the position of the head end of the spring seat and the ratchet wheel when the wrench is disconnected when tightened with the wrench.

Fig. 6 is a schematic view of unscrewing using a wrench.

In the figure: 1. ratchet, 2, ratchet lid, 3, ratchet pin, 4, square tenon, 41, groove, 5, spring seat, 6, compression spring, 7, handle, 8, knob, 81, first portion, 82, second portion, 9, observation hole, 10, mark line, 11, scale mark, 12, use mark, 13, rotation mark.

Detailed Description

The invention is further described below. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

As shown in fig. 1 and 2, the torque-adjustable break-away wrench mainly comprises a ratchet 1, a ratchet cover 2, a ratchet pin 3, a square tenon 4, a spring seat 5, a compression spring 6, a handle 7 and a knob 8. The square tenon 4 is arranged in the inner hole of the ratchet 1, and a certain gap is formed between the excircle of the square tenon 4 and the inner hole of the ratchet 1. The outer circle surface of the square tenon 4 is provided with three uniformly distributed chutes 41, and the ratchet pin 3 is arranged in the chutes 41. When the ratchet wheel 1 rotates along the wide surface direction of the chute of the square tenon 4, the inner wall of the ratchet wheel 1 drives the ratchet wheel pin 3 to roll towards the wide surface direction of the chute 41, the ratchet wheel pin 3 is in contact with the wide surface of the chute 41 and keeps a gap or rotates with the inner wall of the ratchet wheel 1, at the moment, the wrench continues to rotate, and the wrench slips. On the contrary, when the ratchet wheel 1 rotates along the narrow surface direction of the chute 41, the inner wall of the ratchet wheel 1 drives the ratchet wheel pin 3 to roll towards the narrow surface of the chute 41, the ratchet wheel pin 3 is respectively contacted with the chute surface of the square tenon 4 and the inner wall of the ratchet wheel 1, the square tenon 4 and the ratchet wheel 1 are locked, at the moment, the wrench continues to rotate, and the wrench is tightened.

Specifically, the inner hole of the square tenon 4 can be selected according to the requirement, and preferably, the inner hole of the square tenon 4 is a square hole of 4mm × 4mm, and is adapted to an implant screw of 4mm × 4mm specification.

The knob 8 comprises a first portion 81 located inside the handle 7 and a second portion 82 located outside the handle 7, the inner surface of the handle 8 having an internal thread and the outer surface of the first portion 81 having a corresponding external thread. The user adjusts by screwing the second portion 82, the first portion 81 compressing the compression spring 6 inside the handle 7.

Spring holder 5 includes three-stage step axle main part, compression spring 6 sets up the other end at three-stage step axle main part, and the one end of spring holder 5 with ratchet 1 contact is the sphere, is the point contact with ratchet 1, can reduce the friction.

The ratchet wheel 1 is externally provided with a ratchet wheel cover 2, and the ratchet wheel cover 2 can seal two ends of the head part of the handle 7 to prevent the ratchet wheel pin 3 from falling.

As shown in fig. 3, torque values (scale marks 11) with different sizes are marked at the tail of the handle 7, a torque mark line 10 is marked on the knob 8, the torque value corresponding to the torque mark line 10 can be adjusted by rotating the knob, the torque value corresponding to the torque mark line 10 on the knob 8 is the maximum torque when the torque wrench is disconnected, as shown in fig. 3, the mark line 10 is located at 25 n.cm, and at this time, the maximum torque value of the wrench is 25 n.cm. The torque is calculated through the force and the force arm, and in the wrench, the force arm is invariable, so the magnitude of the force is adjusted through adjusting the compression amount of the compression spring, and the magnitude of the torque is changed.

As shown IN fig. 4, when the wrench is used for tightening, the IN surface (using mark 12) on the wrench is made to look at the user, the wrench is rotated IN the direction of an arrow mark (rotating mark 13), at the moment, the square tenon 4 and the ratchet 1 are locked, one end of the spring seat 5 is clamped IN the groove of the ratchet 1, the wrench is continuously rotated, the square tenon 4 and the ratchet 1 together drive the planting screw to rotate, the implant is tightened, the wrench is rotated IN the opposite direction, and the wrench slips.

As shown in fig. 5, when the wrench continues to rotate and the torque gradually increases, one end of the spring seat 5 starts to slide outwards in the groove of the ratchet 1, when one end of the spring seat 5 reaches the end surface of the outer circle of the ratchet 1, the torque reaches a preset value, the wrench continues to rotate, one end of the spring seat 5 slides over the end surface of the outer circle of the ratchet 1 and is disconnected from the ratchet, and the wrench cannot provide a larger torque.

As shown in FIG. 6, when the wrench is turned over, so that the "OUT" surface (using mark 12) of the wrench is facing the user, the wrench is turned in the direction indicated by the arrow, the wrench is unscrewed, the wrench is turned in the opposite direction, and the wrench slips.

Furthermore, the surfaces of the ratchet cover 2, the handle 7 and the knob 8 are subjected to sand blasting treatment, so that the skid resistance of the surface of the product can be increased, the product can be conveniently held by a doctor in the operation process, and meanwhile, the influence of reflection of light on the surface of the product on the operation of the doctor can be prevented.

An application of a torque-adjustable break-away wrench is applied to dental implantation and used for tightening an implant. The using method comprises the following steps: the IN surface of the wrench is IN front view of a user, the wrench is rotated according to the arrow mark direction, at the moment, the square tenon 4 and the ratchet wheel 1 drive the planting screw to rotate together, the planting body is screwed, the wrench is rotated IN the opposite direction, and the wrench slips. When the wrench is turned over, the OUT surface on the wrench is in front view of a user, the wrench is rotated in the direction indicated by the arrow, the wrench is unscrewed, the wrench is rotated in the opposite direction, and the wrench slips.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (10)

1. The utility model provides a moment of torsion adjustable disconnect-type spanner, includes continuous head and handle, characterized by, the head includes the ratchet and installs the square tenon inside the ratchet, be provided with the spring holder in the handle, the one end of spring holder can stretch into between two adjacent teeth of ratchet, be provided with elastic component on the spring holder, the handle has a knob through threaded connection, the knob is compressible elastic component.

2. The break-away torque adjustable wrench according to claim 1, wherein the square tenon has a groove in its outer circumference, and the ratchet pin is disposed in the groove.

3. The break-away torque wrench according to claim 2, wherein the three grooves are uniformly distributed on the outer peripheral surface of the square tenon, and the grooves are inclined grooves.

4. The break-away wrench with adjustable torque as claimed in claim 1, wherein the handle has a viewing hole on the surface thereof, the knob has a mark line corresponding to the location of the viewing hole, and the mark line is provided above or below the viewing hole.

5. The torque adjustable break-away wrench of claim 1, wherein the knob includes a first portion located inside the handle and a second portion located outside the handle.

6. A torque adjustable break-away wrench as claimed in claim 1 or claim 5, in which the spring retainer is spherical at one end.

7. The break-away wrench of claim 6, wherein the spring seat comprises a three-step shaft body, and the resilient member is disposed at the other end of the three-step shaft body.

8. The adjustable torque break-away wrench of claim 1, wherein a ratchet cover is disposed about the ratchet.

9. The breakaway wrench of claim 8, wherein the ratchet cap, the handle, and the knob have surfaces that are grit blasted.

10. The break-away torque wrench as claimed in claim 1, wherein the handle includes a use indicator and a rotation indicator.

Images