CN219323469U - Spanner assembly and ultrasonic cutting hemostatic cutter - Google Patents

Abstract

The utility model provides a wrench assembly and an ultrasonic cutting hemostatic cutter, which comprises a wrench and a transmission sleeve, wherein a through mounting hole is formed in the wrench along the axial direction, the transmission sleeve is mounted in the mounting hole and is axially and relatively fixed with the wrench, the center of the transmission sleeve is used for a cutter bar to pass through, a torsion transmission part is arranged on the inner wall of the transmission sleeve, an elastic screwing piece is arranged on the wrench, a resisting part corresponding to the elastic screwing piece is arranged on the outer wall of the transmission sleeve, when the wrench is rotated positively, the elastic screwing piece is abutted against the resisting part and drives the transmission sleeve to rotate together with the wrench, and when the torsion is greater than a specified value, the elastic screwing piece is separated from the resisting part, and the wrench can rotate relative to the transmission sleeve; when the wrench is rotated in the reverse direction, the resisting part is kept against the elastic screwing piece. Because the spanner component is an independent part, a torque transmission structure is not required to be arranged on the knob, so that the structure of the knob can be simplified, and in addition, the spanner is directly matched with the cutter bar to transmit torque, so that the stability of transmission is ensured.

Description

Spanner assembly and ultrasonic cutting hemostatic cutter

Technical Field

The utility model belongs to the technical field of medical instruments, and particularly relates to a wrench assembly and an ultrasonic cutting hemostatic cutter.

Background

The ultrasonic cutting hemostatic knife has been widely used in open operation due to its excellent hemostatic effect and small damage to tissue, and its working principle is that the transducer is connected with the knife to convert electric energy into mechanical vibration, which is conducted to the knife to raise the temperature of the front end of the knife, so that the temperature of the tissue clamped by the front end of the knife is raised rapidly to coagulate, thereby achieving the purposes of separating tissue and stopping bleeding.

Because the cutter and the energy converter are of a split structure and are connected through the threaded joint, the cutter and the energy converter are required to be fastened into a whole to work normally in the connecting process, and a common mode is to add a set of torque wrench; however, as the ultrasonic cutting hemostatic cutter is provided with the knob assembly for driving the cutter bar to rotate, one mode of the prior art is that the cutter bar and the knob are correspondingly provided with torsion structures, and the cutter and the transducer are connected or detached by operating the knob assembly, the structure can lead to very complex structure of the knob assembly, the knob assembly is inconvenient to manufacture and assemble, in addition, the knob assembly and the cutter bar are usually connected through a locating pin, and torsion is transmitted to the cutter bar through the locating pin, so that the strength is weaker; another way is to provide a torque structure between the torque wrench and the knob assembly, which also requires a torque transmission member on the knob structure; the two modes have the problems of complex structure, inconvenient manufacture and insufficient torque strength transmitted through the locating pin.

Disclosure of Invention

In view of the above-described shortcomings of the prior art, it is an object of the present utility model to provide a wrench assembly that simplifies the construction of an ultrasonic cutting hemostatic cutter knob by providing a torque wrench alone to operate the cutter bar.

To achieve the above object and other related objects, the present utility model provides the following technical solutions:

the wrench assembly comprises a wrench and a transmission sleeve, wherein a through mounting hole is formed in the wrench along the axial direction, the transmission sleeve is mounted in the mounting hole and is axially and relatively fixed with the wrench, the center of the transmission sleeve is used for a cutter bar to pass through, and a torsion transmission part for transmitting torsion to the cutter bar is arranged on the inner wall of the transmission sleeve; the wrench is provided with an elastic screwing piece, the outer wall of the transmission sleeve is provided with a resisting part corresponding to the elastic screwing piece, when the wrench is rotated in a first direction, the elastic screwing piece is abutted against the resisting part and drives the transmission sleeve to rotate along with the wrench, when the torque force is greater than a specified value, the elastic screwing piece is separated from the resisting part, the wrench can rotate relative to the transmission sleeve, and the transmission part stops transmitting the torque force to the cutter bar; when the wrench is rotated in the second direction, the abutment portion is held against the resilient twisting member.

Optionally, the spanner includes operating portion and connects the adapter sleeve in the operating portion rear end, has seted up the window on the adapter sleeve, be provided with the cantilever along adapter sleeve circumference on the window, the terminal inward bulge of cantilever forms elasticity is twisted and is changeed the piece.

Optionally, the tail end of the cantilever protrudes inwards to form a convex tooth, one side of the convex tooth facing the first direction is an inclined plane or an arc surface, and one side of the convex tooth facing the second direction is a positioning surface.

Optionally, the transmission sleeve rear portion has first transmission section and the second transmission section that links to each other around, first transmission section is located in the adapter sleeve, the department of resisting sets up the outer wall of first transmission section, the second transmission section backward stretches out the adapter sleeve to be used for with the cutter arbor cooperation, torsion transmission portion sets up the inner wall at the second transmission section.

Optionally, a first axial positioning structure is arranged between the front part of the transmission sleeve and the wrench, a second axial positioning structure is arranged between the rear part of the transmission sleeve and the wrench, and the transmission sleeve and the wrench are axially fixed through the first axial positioning structure and the second axial positioning structure.

Optionally, the front end inner wall of mounting hole is provided with the location step, the front end of drive sleeve is provided with the jack catch that can radially stretch out and draw back, the jack catch outer wall is provided with spacing boss, the rear portion outer wall of drive sleeve is provided with the holding ring, the drive sleeve is followed spanner rear end is packed into the mounting hole, the holding ring supports on the rear end face of drive sleeve, spacing boss card is in the location step the place ahead.

Optionally, an inclined guide surface is arranged at the inner edge of the rear end of the connecting sleeve, and a corresponding conical matching surface is arranged at the joint of the positioning ring and the transmission sleeve.

Optionally, at least two resisting parts are arranged along the circumferential direction of the transmission sleeve, and the resisting parts are unidirectional teeth; the elastic twisting piece is provided with at least two along the circumference of the wrench.

The utility model also provides an ultrasonic cutting hemostatic cutter, which comprises a cutter bar, a knob assembly and the wrench assembly, wherein the knob assembly is arranged on the cutter bar, a flat structure matched with the torque transmission part is arranged on the cutter bar, a positioning groove is formed in the front end of the knob assembly, and when the wrench assembly is connected with the cutter bar, the rear end of the transmission sleeve stretches into the positioning groove.

Optionally, the torsion transmission part corresponds to the position of the positioning groove along the axial direction of the cutter bar.

The utility model has the beneficial effects that: because spanner subassembly is independent spare part, just use spanner subassembly and cutter arbor cooperation when cutter arbor and transducer need be connected or dismantle, therefore can not influence the structure of parts such as knob on the cutter arbor, need not set up torsion transmission structure on the knob, therefore can simplify the structure of knob, in addition, set up torsion transmission portion on the drive sleeve of spanner, direct and cutter arbor cooperation transmission torsion, guarantee driven stability, avoid passing through the locating pin of knob and the easy too big problem of local stress that causes of transmission torsion between the cutter arbor.

Drawings

FIG. 1 is an exploded view of a wrench assembly in one embodiment;

FIG. 2 is a cross-sectional view of a wrench assembly in one embodiment;

FIG. 3 is a cross-sectional view of a wrench in one embodiment;

FIG. 4 is a schematic view of the structure of a driving sleeve in one embodiment;

FIG. 5 is a cross-sectional view of a drive sleeve in one embodiment;

FIG. 6 is a schematic view of an embodiment of a knob assembly and tool holder assembly;

FIG. 7 is a schematic illustration of a wrench assembly and tool bar during installation in accordance with one embodiment;

FIG. 8 is a schematic diagram illustrating the assembly of a wrench with a tool bar in place according to one embodiment.

Part number description:

1-a wrench; 11-an operation part; 12-connecting sleeve; 121-window; 13-elastic twisting piece; 131-cantilever; 132-teeth; 14-mounting holes; 15-positioning the step; 16-inclined guide surface; 2-a transmission sleeve; 21-a first transmission section; 22-a second transmission section; 23-a torque transmission part; 24-positioning ring; 25-a resisting part; 25 a-avoiding surface; 26-claw; 27-limiting bosses; 28-conical mating surface; a 100-wrench assembly; 200-knife bar; 201-flat structure; 300-a knob assembly; 301-positioning groove.

Detailed Description

Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present utility model, which is described by the following specific examples.

In the example, one end of the ultrasonic cutting hemostatic cutter, which faces towards a patient during operation, is used as the front, and one end of the ultrasonic cutting hemostatic cutter, which faces away from the patient, is used as the rear.

Examples

As shown in fig. 1 to 6, a wrench assembly illustrated in this embodiment includes a wrench 1 and a driving sleeve 2, wherein a through mounting hole 14 is formed in the wrench 1 along an axial direction (i.e., a front-rear direction), the driving sleeve 2 is mounted in the mounting hole 14 and is connected with the wrench 1 in an axially relatively fixed manner, and a center of the driving sleeve 2 is used for passing through a tool bar 200 so as to be sleeved from a front end of the tool bar 200 in use; the inner wall of the transmission sleeve 2 is provided with a torsion transmission part 23 for transmitting torsion to the cutter bar 200, and when the cutter bar 200 is connected with the transducer or the handle, the wrench 1 drives the cutter bar 200 to rotate; the wrench 1 is provided with an elastic screwing piece 13, the outer wall of the transmission sleeve 2 is provided with a resisting part 25 corresponding to the elastic screwing piece 13, when the wrench 1 is rotated along a first direction, the elastic screwing piece 13 and the resisting part 25 drive the transmission sleeve 2 to rotate together, and when the torsion is greater than a specified value, the elastic screwing piece 13 and the resisting part 25 are separated, so that the wrench 1 can rotate relative to the transmission sleeve 2; when the wrench 1 is rotated in the second direction, the abutment 25 is kept against the resilient screw member 13, i.e. the torque force is continuously transmitted.

In the above structure, the tool bar 200 is provided with the twisting part corresponding to the torque transmission part 23, when in use, the wrench assembly is sleeved on the tool bar 200 from the front end of the tool bar 200, and the wrench assembly is moved backwards to the position matched with the twisting part, so that the tool bar 200 and the transducer can be connected or detached; when in connection or disassembly, the wrench assembly is rotated along a first direction, so that the cutter bar 200 is driven to rotate relative to the transducer, and the screwing between the cutter bar 200 and the transducer is realized; when the torque force is larger than a preset specified value, the elastic twisting piece 13 and the resisting part 25 slip off, and the wrench 1 continues to rotate along the first direction, so that the torque force is not transmitted to the cutter bar 200, and the damage to the instrument due to the overlarge torque force is avoided; when the wrench 1 is detached, the elastic screwing piece 13 is kept in contact with the abutment 25, so that the torque can be continuously transmitted, and the cutter bar 200 can be detached from the transducer. The first direction and the second direction are opposite, for example one is clockwise and the other is counter-clockwise.

Because spanner subassembly is independent spare part, just use spanner subassembly and cutter arbor 200 cooperation when cutter arbor 200 and transducer need be connected or dismantle, therefore can not influence the structure of parts such as knob on the cutter arbor 200, need not set up torsion transmission structure on the knob, therefore can simplify the structure of knob, in addition, set up torsion transmission portion 23 on wrench 1's drive sleeve 2, directly cooperate transmission torsion with cutter arbor 200, guarantee driven stability, avoid passing through the locating pin of knob and the problem that the transmission torsion causes local overstress easily between cutter arbor 200.

As shown in fig. 1 and 2, in some embodiments, the wrench 1 includes an operation portion 11 and a connecting sleeve 12 connected to a rear end of the operation portion 11, the operation portion 11 is used for manual operation, a window 121 is formed on a side wall of the connecting sleeve 12, the window 121 is distributed in at least two along a circumferential direction of the connecting sleeve 12, a cantilever 131 is arranged on the window 121 and extends along the circumferential direction of the connecting sleeve 12, a tail end of the cantilever 131 protrudes inwards to form an elastic screwing piece 13, the cantilever 131 has elasticity, and torsion is transmitted through cooperation of a protruding portion at the tail end of the cantilever 131 and a resisting portion 25 on the transmission sleeve 2.

As shown in fig. 3, in some embodiments, the tip of the cantilever 131 protrudes inward to form a tooth 132, and a side of the tooth 132 facing the first direction is an inclined surface or an arc surface, and when the wrench 1 rotates in the first direction, the inclined surface or the arc surface abuts against the abutment 25, and when the torque force is greater than a specified value, the cantilever 131 swings outward to be separated from the abutment 25; the convex teeth 132 face to one side of the second direction, and the stop surface and the resisting part 25 are kept against each other in the tangential direction of the driving sleeve 2, so that when the wrench 1 is rotated in the second direction, the wrench 1 and the driving sleeve 2 always keep synchronous rotation; the stop surface can be perpendicular to the outer wall of the driving sleeve 2.

In some embodiments, the rear part of the driving sleeve 2 is provided with a first driving section 21 and a second driving section 22 which are connected front and back, the first driving section 21 is positioned in the connecting sleeve 12, the resisting parts 25 are arranged on the outer wall of the first driving section 21, at least two resisting parts are arranged at intervals along the circumferential direction of the first driving section 21, the second driving section 22 extends out of the connecting sleeve 12 backwards and is used for being matched with the cutter bar 200, and the torsion driving part 23 is arranged on the inner wall of the second driving section 22.

As shown in fig. 1, 2, 4 and 5, a first axial positioning structure is arranged between the front part of the transmission sleeve 2 and the wrench 1, a second axial positioning structure is arranged between the rear part of the transmission sleeve 2 and the wrench 1, and the transmission sleeve 2 and the wrench 1 are axially fixed through the first axial positioning structure and the second axial positioning structure. Specifically, the front end inner wall of the mounting hole 14 is provided with a positioning step 15, the front end of the transmission sleeve 2 is provided with clamping claws 26 which can radially stretch and retract, the clamping claws 26 are distributed into at least two along the circumferential direction of the transmission sleeve 2 at intervals, the outer wall of each clamping claw 26 is provided with a limiting boss 27, the outer wall of the rear part of the transmission sleeve 2 is provided with a positioning ring 24, the transmission sleeve 2 is arranged into the mounting hole 14 from the rear end of the connecting sleeve 12, in the process of being arranged, the clamping claws 26 are inwards contracted due to the fact that the limiting bosses 27 are extruded by the inner wall of the mounting hole 14, when the transmission sleeve moves forwards to the position where the limiting bosses 27 enter the positioning step 15, the clamping claws 26 outwards stretch and reset, at the moment, the limiting bosses 27 are clamped in front of the positioning step 15, the positioning rings 24 are propped against the rear end face of the transmission sleeve 2, and therefore axial connection positioning between the transmission sleeve 2 and the wrench 1 is achieved. Wherein the second axial positioning structure is formed between the positioning ring 24 and the rear end of the connecting sleeve 12; a first axial limiting structure is formed between the limiting boss 27 and the positioning step 15.

As shown in fig. 3 and 4, the inner edge of the rear end of the connecting sleeve 12 is provided with an inclined guide surface 16, the connection part of the positioning ring 24 and the transmission sleeve 2 is provided with a corresponding inclined guide surface 28, and the axial contact positioning between the connecting sleeve 12 and the transmission sleeve 2 can be kept through the inclined guide surface 16 and the inclined guide surface 28.

In some embodiments, the abutment 25 is a unidirectional tooth or a ratchet, and a side of the abutment 25 facing the second direction is provided with a relief surface 25a, and the relief surface 25a is an inclined surface or an arc surface, so that the elastic screwing piece 13 passes over the abutment 25 when the torque force is excessive; the side of the resisting portion 25 facing the first direction is a vertical surface so as to be held against the elastic turning piece 13, and transmits torsion force.

As shown in fig. 8, this embodiment also illustrates an ultrasonic cutting hemostatic cutter, which includes a cutter bar 200, a knob assembly 300, and a wrench assembly 100 according to any of the above embodiments, and the structures such as a handle and a transducer are not shown; the knob assembly 300 is mounted on the cutter bar 200, and is fixedly connected with the cutter bar 200 through a positioning pin, and a flat structure 201 matched with the torque transmission part 23 is arranged on the cutter bar 200, wherein, as shown in fig. 6, a positioning groove 301 is formed at the front end of the knob assembly 300, and when the wrench assembly 100 is connected with the cutter bar 200, the rear end of the transmission sleeve 2 stretches into the positioning groove 301, so that axial positioning is realized.

Fig. 7 is a schematic view of wrench assembly 100 being wrapped around tool bar 200 and approaching knob assembly 300.

Specifically, along the axis direction of the cutter bar 200, the flat structure 201 corresponds to the position of the positioning groove 301, the second transmission section 22 stretches into the positioning groove 301, the rear end face of the second transmission section 22 contacts with the bottom of the positioning groove 301 to realize positioning, and the flat structure of the inner wall of the second transmission section 22 is matched with the torsion transmission part 201 on the cutter bar 200, so that torsion is transmitted.

In this embodiment, since the wrench assembly 100 is an independent component, the wrench assembly 100 and the wrench bar 200 are matched for use when the wrench bar 200 and the transducer are required to be connected or disassembled, so that the structure of the components such as a knob on the wrench bar 200 is not affected, and the structure of the knob can be simplified without arranging a torque transmission structure on the knob, in addition, a torque transmission part is arranged on the transmission sleeve 2 of the wrench, and the torque transmission part is directly matched with the wrench bar 200 to transmit the torque, so that the stability of transmission is ensured, and the problem that local stress is overlarge easily caused by the torque transmission between the positioning pin of the knob and the wrench bar 200 is avoided.

Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims (10)

1. A wrench assembly, characterized in that: the wrench comprises a wrench body and a transmission sleeve, wherein a through mounting hole is formed in the wrench body along the axial direction, the transmission sleeve is mounted in the mounting hole and is axially and relatively fixed with the wrench body, the center of the transmission sleeve is used for a cutter bar to penetrate through, and a torsion transmission part for transmitting torsion to the cutter bar is arranged on the inner wall of the transmission sleeve; the wrench is provided with an elastic screwing piece, the outer wall of the transmission sleeve is provided with a resisting part corresponding to the elastic screwing piece, when the wrench is rotated in a first direction, the elastic screwing piece and the resisting part drive the transmission sleeve to rotate together, and when the torque force is greater than a specified value, the elastic screwing piece is separated from the resisting part, the wrench can rotate relative to the transmission sleeve, and the transmission part stops transmitting the torque force to the cutter bar; when the wrench is rotated in the second direction, the abutment portion is held against the resilient twisting member.

2. The wrench assembly according to claim 1, wherein: the wrench comprises an operation part and a connecting sleeve connected to the rear end of the operation part, a window is formed in the connecting sleeve, a cantilever is arranged on the window along the circumference of the connecting sleeve, and the tail end of the cantilever protrudes inwards to form the elastic screwing piece.

3. The wrench assembly according to claim 2, wherein: the tail end of the cantilever protrudes inwards to form a convex tooth, one side of the convex tooth facing the first direction is an inclined plane or an arc surface, and the convex tooth faces one side of the second direction to a position surface.

4. A wrench assembly according to claim 3, wherein: the transmission sleeve rear portion has the first transmission section and the second transmission section that link to each other around, first transmission section is located in the adapter sleeve, the department of resisting sets up the outer wall of first transmission section, the second transmission section backward stretches out the adapter sleeve to be used for with the cutter arbor cooperation, torsion transmission portion sets up the inner wall at the second transmission section.

5. The wrench assembly according to claim 2, wherein: a first axial positioning structure is arranged between the front part of the transmission sleeve and the wrench, a second axial positioning structure is arranged between the rear part of the transmission sleeve and the wrench, and the transmission sleeve and the wrench are axially fixed through the first axial positioning structure and the second axial positioning structure.

6. The wrench assembly according to claim 5, wherein: the front end inner wall of mounting hole is provided with the location step, the front end of drive sleeve is provided with the jack catch that can radially stretch out and draw back, the jack catch outer wall is provided with spacing boss, the rear portion outer wall of drive sleeve is provided with the holding ring, the drive sleeve is followed spanner rear end is packed into the mounting hole, the holding ring supports on the rear end face of drive sleeve, spacing boss card is in the location step the place ahead.

7. The wrench assembly of claim 6, wherein: the inner edge of the rear end of the connecting sleeve is provided with an inclined guide surface, and the joint of the positioning ring and the transmission sleeve is provided with a corresponding conical matching surface.

8. The wrench assembly according to any one of claims 1-7, wherein: the resisting parts are provided with at least two along the circumferential direction of the transmission sleeve, and the resisting parts are unidirectional teeth; the elastic twisting piece is provided with at least two along the circumference of the wrench.

9. An ultrasonic cutting hemostasis sword, its characterized in that: the wrench comprises a cutter bar, a knob assembly and the wrench assembly according to any one of claims 1-8, wherein the knob assembly is arranged on the cutter bar, a flat structure matched with the torque transmission part is arranged on the cutter bar, a positioning groove is formed in the front end of the knob assembly, and when the wrench assembly is connected with the cutter bar, the rear end of the transmission sleeve stretches into the positioning groove.

10. The ultrasonic cutting hemostatic cutter according to claim 9 wherein: along the axial direction of the cutter bar, the torsion transmission part corresponds to the position of the positioning groove.

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