阅读说明：本技术 一种新型断棒总成 (Novel broken rod assembly ) 是由 房志刚 王金顺 花金锦 贺军 韦良 于 2021-09-08 设计创作，主要内容包括：本发明涉及一种新型断棒总成,包括底座,以及设在底座上的断棒主体机构和断棒驱动机构,所述断棒主体机构包括断棒臂和断棒臂基座,其创新点在于：所述断棒驱动机构包括断棒驱动壳座、驱动齿轮、断棒驱动轴和复位弹片,所述断棒驱动壳座设在底座的另一端,且驱动齿轮设在断棒驱动壳座的内部并通过断棒驱动轴与断棒驱动壳座转动连接,所述断棒臂的另一端插入断棒驱动壳座的内部,且断棒臂另一端的端部设有齿槽,所述断棒臂的齿槽与驱动齿轮啮合,所述复位弹片设在断棒驱动壳座内部,所述复位弹片的两端分别与断棒臂另一端的底部以及断棒驱动壳座内的底部固定连接。本发明不仅操作过程中整体不会发生转动,而且加长力矩后操作也更加省力。(The invention relates to a novel broken rod assembly, which comprises a base, a broken rod main body mechanism and a broken rod driving mechanism, wherein the broken rod main body mechanism and the broken rod driving mechanism are arranged on the base, the broken rod main body mechanism comprises a broken rod arm and a broken rod arm base, and the novel broken rod assembly is characterized in that: the broken rod driving mechanism comprises a broken rod driving shell seat, a driving gear, a broken rod driving shaft and a reset elastic sheet, the broken rod driving shell seat is arranged at the other end of the base, the driving gear is arranged in the broken rod driving shell seat and is rotatably connected with the broken rod driving shell seat through the broken rod driving shaft, the other end of the broken rod arm is inserted into the broken rod driving shell seat, a tooth groove is formed in the end portion of the other end of the broken rod arm, the tooth groove of the broken rod arm is meshed with the driving gear, the reset elastic sheet is arranged in the broken rod driving shell seat, and two ends of the reset elastic sheet are fixedly connected with the bottom of the other end of the broken rod arm and the bottom of the broken rod driving shell seat respectively. The invention not only can not rotate integrally in the operation process, but also saves more labor after the torque is lengthened.)

1. A novel broken rod assembly comprises a base (1), a broken rod main body mechanism (2) and a broken rod driving mechanism (3) which are arranged on the base (1),

the rod breaking main body mechanism (2) comprises a rod breaking arm (21) and a rod breaking arm base (22), the rod breaking arm base (22) is arranged at one end of the base (1), one end of the rod breaking arm (21) is rotatably connected with the rod breaking arm base (22), the rod breaking arm (21) and the rod breaking arm base (22) are provided with a plurality of groups of connecting rod jacks (23) which correspond to each other and have different apertures,

the method is characterized in that: broken rod drive mechanism (3) is including disconnected excellent drive shell seat (31), drive gear (32), disconnected excellent drive shaft (33) and shell fragment (34) that resets, disconnected excellent drive shell seat (31) is established at the other end of base (1), and drive gear (32) establish the inside of disconnected excellent drive shell seat (31) and rotate with disconnected excellent drive shell seat (31) through disconnected excellent drive shaft (33) and be connected, disconnected excellent drive shaft (33) one end tip is located outside the lateral wall of disconnected excellent drive shell seat (31), the inside of disconnected excellent drive shell seat (31) is inserted to the other end of disconnected excellent arm (21), and the tip of disconnected excellent arm (21) other end is equipped with tooth's socket (211), tooth's socket (211) of disconnected excellent arm (21) mesh with drive gear (32), shell fragment (34) that resets are established inside disconnected excellent drive shell seat (31), the both ends of shell fragment (34) respectively with the bottom of disconnected excellent arm (21) other end and the bottom of disconnected excellent drive shell seat (31) in the bottom of disconnected excellent drive shell seat (31) are solid And (4) fixing connection.

2. The novel broken rod assembly of claim 1, wherein: disconnected excellent main part mechanism (2) still includes guiding axle (24), the other end of disconnected excellent arm (21) is equipped with guiding hole (212), guiding axle (24) are established in guiding hole (212) of disconnected excellent arm (21) rather than the shaft hole cooperation, and the both ends of guiding axle (24) and the lateral wall fixed connection of disconnected excellent drive shell seat (31).

3. The novel broken rod assembly of claim 1, wherein: the broken rod driving mechanism (3) further comprises a broken rod driving shaft seat (35), the broken rod driving shaft seat (35) is arranged on the side wall of the broken rod driving shell seat (31) and fixedly connected with the broken rod driving shell seat (31), the broken rod driving shaft (33) is rotatably connected with the broken rod driving shaft seat (35), and one end part of the broken rod driving shaft (33) penetrates through the outside of the broken rod driving shaft seat (35).

4. The novel broken rod assembly of claim 3, wherein: disconnected stick drive shaft (33) is including mutually as an organic whole or fixed connection's polygon axle (331) and axis of rotation (332), and the external diameter of polygon axle (331) is greater than the external diameter of axis of rotation (332), drive gear (32) suit is on axis of rotation (332), polygon axle (331) and disconnected stick drive axle seat (35) rotate and are connected, and outside disconnected stick drive axle seat (35) was passed to the tip of polygon axle (331) free end.

5. The novel broken rod assembly of claim 1, wherein: and a limiting stop shaft (36) is arranged on the broken rod driving shell seat (31) and close to the broken rod driving shaft (33).

6. The novel broken rod assembly of claim 1, wherein: the broken rod protection device is characterized by further comprising a pulling cover (5), wherein the pulling cover (5) covers the peripheries of the broken rod main body mechanism (2) and the broken rod driving mechanism (3), and the pulling cover (5) is detachably connected with the base (1).

7. The novel rod break assembly of claim 6, wherein: the base (1) is provided with a positioning step (11), the lifting cover (5) is arranged on the positioning step (11) of the base (1), and the lifting cover (5) is detachably connected with the base (1) through a connecting mechanism (6).

8. The novel rod break assembly of claim 7, wherein: the two ends of the base (1) are respectively provided with a connecting mechanism (6), the lifting cover (5) is detachably connected with the base (1) through the connecting mechanism (6), two ends of the lifting cover (5) are respectively provided with a positioning connecting hole, the connecting mechanism (6) comprises a locking rod (61), a linkage rod (62), a guide positioning rod (63) and a spring (64), two ends of the base (1) are respectively provided with two spring installation cavities, each spring installation cavity is internally provided with a spring (64) and a guide positioning rod (63), two ends of each spring (64) respectively abut against the inner wall of the spring installation cavity of the base (1) and one end of each guide positioning rod (63), the other end of each guide positioning rod (63) is positioned at the outer side of the base (1), the linkage rod (62) is arranged at the bottom of the base (1), and the linkage rod (62) is fixedly connected with the guide positioning rods (63) through fasteners, the locking rod (61) is fixedly connected with the linkage rod (62), the free end of the locking rod (61) is located on the outer side of the end portion of the base (1), the locking rod (61) is driven, the locking rod (61) simultaneously drives the linkage rod (62) and the guide positioning rod (63) to move axially, after the spring (64) is compressed, the other end of the guide positioning rod (63) is separated from the positioning connecting hole of the lifting cover (5), otherwise, after the spring (64) is reset, the other end of the guide positioning rod (63) penetrates through the positioning connecting hole of the lifting cover (5), and the lifting cover (5) and the base (1) are locked into a whole.

9. The novel rod break assembly of claim 6, wherein: the lifting cover (5) comprises a lifting cover shell (51) and a lifting handle (52), the lifting handle (52) is arranged at the top of the lifting cover shell (51) and connected with the lifting cover shell, and the lifting cover shell (51) and the broken rod driving shell seat (31) are provided with a plurality of weight-reducing disinfection holes (7).

10. The novel broken rod assembly of claim 1, wherein: still measure stop gear (4) including disconnected excellent measuring rod (41) and regulation pole (42), the one end of disconnected excellent arm (21) is passed through connecting axle (25) and is rotated with disconnected excellent arm base (22) and be connected, connecting axle (25) have the connection screw, the one end of disconnected excellent measuring rod (41) is twisted in the connection screw of connecting axle (25) and is linked as an organic whole with connecting axle (25), adjust pole (42) suit and rather than sliding fit on disconnected excellent measuring rod (41), the pole body of disconnected excellent measuring rod (41) has the scale, adjust pole (42) have rather than spacing needle (421) as an organic whole or fixed connection each other.

Technical Field

The invention relates to a broken rod assembly, in particular to a novel broken rod assembly suitable for an implanted connecting rod in an orthopedic operation, and belongs to the technical field of medical instruments.

Background

Need utilize the connective bar to fix a plurality of pedicle of vertebral arch nails implanted as a whole among the current bone surgery, the connective bar can be adjusted into suitable length according to the actual demand of operation with it, and traditional means utilizes similar scissors mechanism to cut the connective bar, owing to implement disconnected stick to the connective bar and can only operate in the aseptic zone in the operating room, consequently use the disconnected stick in-process of this kind of structure to have following defect: firstly, the rod can be broken only by great effort, and broken objects are easy to splash when the rod is broken, and other instruments in the operation can be damaged when the rod is serious; secondly, the rod breaking mechanism has large volume, and the operable space in the sterile area is very limited, so that the rod breaking operation is very inconvenient.

In order to overcome the drawback of traditional disconnected excellent technical scheme, among the prior art, implement disconnected excellent through disconnected excellent device to the connective bar, disconnected excellent device includes base, disconnected excellent casing and disconnected excellent mechanism promptly, disconnected excellent casing all establishes on the base with disconnected excellent mechanism, disconnected excellent mechanism includes disconnected excellent main part, disconnected excellent base, the shell fragment that resets and disconnected excellent drive shaft of disconnected excellent, disconnected excellent drive shaft is established on disconnected excellent casing, disconnected excellent process: the broken rod device is integrally and directly placed on the operating platform, one end of the connecting rod is inserted into the broken rod base and the connecting rod inserting hole in the broken rod main body according to the outer diameter of the connecting rod, when the broken rod driving shaft rotates, one end of the broken rod main body rotates relative to the broken rod base, the inner end of the broken rod driving shaft can abut against the other end of the broken rod main body, the other end of the reset elastic piece is in a pressing-down state, the broken rod driving shaft is continuously driven to rotate until part of the connecting rod in the broken rod main body connecting rod inserting hole is separated from part of the connecting rod in the broken rod base connecting rod inserting hole, and the broken rod of the connecting rod is completed.

According to the structure of the broken rod device, the broken rod driving shaft is located at the top of the broken rod shell, the broken rod driving shaft is arranged on the broken rod shell in the vertical direction, the broken rod driving shaft is rotated, the broken rod driving shaft enables the inner end of the broken rod driving shaft to be abutted against the other end of the broken rod main body in a rotating pressing mode, the reset elastic sheet is in a pressing state, the broken rod process is implemented on the connecting rod with a thicker relative outer diameter, the rotating force of the broken rod driving shaft needs to be increased, the base is enabled to rotate along with the broken rod driving shaft due to the fact that the rotating force is concentrated on the broken rod driving shaft, the difficulty of the broken rod is increased, the broken rod is enabled to be difficult to break, the base needs to be pressed and the broken rod driving shaft needs to be rotated simultaneously in the operation process of an operator, and certain inconvenience is brought to the operation.

Disclosure of Invention

The purpose of the invention is: the novel broken rod assembly is not only integrally prevented from rotating in the operation process, but also saves more labor in operation after the torque is increased.

In order to achieve the purpose, the technical scheme of the invention is as follows: a novel broken rod assembly comprises a base, a broken rod main body mechanism and a broken rod driving mechanism which are arranged on the base,

the rod breaking main body mechanism comprises a rod breaking arm and a rod breaking arm base, the rod breaking arm base is arranged at one end of the base, one end of the rod breaking arm is rotatably connected with the rod breaking arm base, the rod breaking arm and the rod breaking arm base are provided with a plurality of groups of connecting rod jacks which correspond to each other and have different apertures,

the innovation points are as follows: the broken rod driving mechanism comprises a broken rod driving shell seat, a driving gear, a broken rod driving shaft and a reset elastic sheet, the broken rod driving shell seat is arranged at the other end of the base, the driving gear is arranged in the broken rod driving shell seat and is rotatably connected with the broken rod driving shell seat through the broken rod driving shaft, one end of the broken rod driving shaft is located outside the side wall of the broken rod driving shell seat, the other end of the broken rod arm is inserted into the broken rod driving shell seat, a tooth groove is formed in the end of the other end of the broken rod arm, the tooth groove of the broken rod arm is meshed with the driving gear, the reset elastic sheet is arranged in the broken rod driving shell seat, and two ends of the reset elastic sheet are fixedly connected with the bottom of the other end of the broken rod arm and the bottom in the broken rod driving shell seat respectively.

In the above technical scheme, the rod breaking main body mechanism further comprises a guide shaft, the other end of the rod breaking arm is provided with a guide hole, the guide shaft is arranged in the guide hole of the rod breaking arm and matched with the shaft hole of the rod breaking arm, and two ends of the guide shaft are fixedly connected with the side wall of the rod breaking driving shell seat.

In the above technical scheme, the broken rod driving mechanism further includes a broken rod driving shaft seat, the broken rod driving shaft seat is arranged on the side wall of the broken rod driving shell seat and fixedly connected with the broken rod driving shell seat, the broken rod driving shaft is rotatably connected with the broken rod driving shaft seat, and one end of the broken rod driving shaft penetrates through the outside of the broken rod driving shaft seat.

In the above technical scheme, the broken rod driving shaft comprises a polygonal shaft and a rotating shaft which are integrated with each other or fixedly connected, the outer diameter of the polygonal shaft is larger than that of the rotating shaft, the driving gear is sleeved on the rotating shaft, the polygonal shaft is rotatably connected with the broken rod driving shaft seat, and the end part of the free end of the polygonal shaft penetrates through the outside of the broken rod driving shaft seat.

In the above technical scheme, the broken rod driving shell seat is provided with a limit stop shaft near the broken rod driving shaft.

In the technical scheme, the device further comprises a pulling cover, the pulling cover covers the peripheries of the broken rod main body mechanism and the broken rod driving mechanism, and the pulling cover is detachably connected with the base.

In the technical scheme, the base is provided with a positioning step, the lifting cover is arranged on the positioning step of the base, and the lifting cover is detachably connected with the base through a connecting mechanism.

In the technical scheme, two ends of the base are respectively provided with a connecting mechanism, the lifting cover is detachably connected with the base through the connecting mechanism, two ends of the lifting cover are respectively provided with a positioning connecting hole, the connecting mechanism comprises a locking rod, a linkage rod, a guide positioning rod and a spring, two ends of the base are respectively provided with two spring installation cavities, each spring installation cavity is internally provided with a spring and a guide positioning rod, two ends of the spring are respectively abutted against the inner wall of the spring installation cavity of the base and one end of the guide positioning rod, the other end of the guide positioning rod is positioned on the outer side of the base, the linkage rod is arranged at the bottom of the base and is fixedly connected with the guide positioning rod through a fastener, the locking rod is fixedly connected with the linkage rod, the free end of the locking rod is positioned on the outer side of the end part of the base to drive the locking rod, and the locking rod simultaneously drives the linkage rod and the guide positioning rod to axially move, after the spring is compressed, the other end of the guide positioning rod is separated from the positioning connecting hole of the lifting cover, otherwise, after the spring is reset, the other end of the guide positioning rod penetrates through the positioning connecting hole of the lifting cover, so that the lifting cover and the base are locked into a whole.

In the technical scheme, the lifting cover comprises a lifting cover shell and a lifting handle, the lifting handle is arranged at the top of the lifting cover shell and connected with the lifting cover shell, and the lifting cover shell and the broken rod driving shell seat are respectively provided with a plurality of weight-reducing disinfection holes.

In the technical scheme, the broken rod measuring and limiting mechanism is further included, the broken rod measuring and limiting mechanism comprises a broken rod measuring rod and an adjusting rod, one end of a broken rod arm is rotatably connected with a broken rod arm base through a connecting shaft, the connecting shaft is provided with a connecting screw hole, one end of the broken rod measuring rod is screwed into the connecting screw hole of the connecting shaft and is connected with the connecting shaft into a whole, the adjusting rod is sleeved on the broken rod measuring rod in a sliding fit mode, scales are arranged on the rod body of the broken rod measuring rod, and the adjusting rod is provided with limiting needles which are integrated with the adjusting rod or fixedly connected with the adjusting rod.

The invention has the positive effects that: after the novel broken rod assembly is adopted, the broken rod driving mechanism comprises a broken rod driving shell seat, a driving gear, a broken rod driving shaft and a reset elastic sheet, the broken rod driving shell seat is arranged at the other end of the base, the driving gear is arranged in the broken rod driving shell seat and is rotationally connected with the broken rod driving shell seat through the broken rod driving shaft, one end part of the broken rod driving shaft is positioned outside the side wall of the broken rod driving shell seat, the other end of the broken rod arm is inserted into the broken rod driving shell seat, the end part of the other end of the broken rod arm is provided with a tooth socket, the tooth socket of the broken rod arm is meshed with the driving gear, the reset elastic sheet is arranged in the broken rod driving shell seat, and the two ends of the reset elastic sheet are respectively fixedly connected with the bottom of the other end of the broken rod arm and the bottom in the broken rod driving shell seat,

when the connecting rod is used, one end of the connecting rod is inserted into the corresponding connecting rod insertion hole according to the outer diameter of the connecting rod, the length of the connecting rod inserted into the connecting rod insertion hole of the rod breaking arm is the breaking length according to the requirements of an operation, the rod breaking driving shaft positioned on the side wall of the rod breaking driving shell seat is driven to rotate, meanwhile, the rod breaking driving shaft drives the driving gear to rotate, the driving gear is meshed with the tooth grooves of the rod breaking arm, the other end of the rod breaking arm moves downwards and drives the resetting elastic sheet to be in a downward pressing state, the rod breaking driving shaft is continuously driven to rotate until the joint of the connecting rod positioned in the connecting rod insertion hole of the rod breaking arm and the connecting rod positioned in the connecting rod insertion hole of the rod breaking arm base is broken, the rod breaking is completed, and finally the rod breaking arm is reset by means of the elastic sheet;

the broken rod assembly adopting the invention has the advantages that: the invention increases the moment, even if the connecting rod with thicker outer diameter is broken, the whole connecting rod can not rotate in the process of applying force to drive the broken rod driving shaft on the side wall of the broken rod driving shell seat to rotate.

Drawings

FIG. 1 is a schematic perspective view of an embodiment of the present invention;

FIG. 2 is a schematic view of the present invention without the pull cup;

FIG. 3 is a schematic bottom view of FIG. 2;

FIG. 4 is a schematic perspective view of the present invention without the pull cup (prior to use);

FIG. 5 is a partial perspective view of the breaking rod driving mechanism of the present invention (excluding the breaking rod driving housing base);

FIG. 6 is a schematic view of the pull cup of the present invention;

FIG. 7 is a schematic perspective view of a pulling hood body according to the present invention;

fig. 8 is a schematic view of the state of use of the present invention.

Detailed Description

The invention is further illustrated, but not limited, by the following examples in connection with the accompanying drawings.

As shown in fig. 1, 2, 3, 4, 5, 6, 7 and 8, a novel rod breaking assembly comprises a base 1, a rod breaking main body mechanism 2 and a rod breaking driving mechanism 3 which are arranged on the base 1,

the rod breaking main body mechanism 2 comprises a rod breaking arm 21 and a rod breaking arm base 22, the rod breaking arm base 22 is arranged at one end of the base 1, one end of the rod breaking arm 21 is rotatably connected with the rod breaking arm base 22, the rod breaking arm 21 and the rod breaking arm base 22 are provided with a plurality of groups of connecting rod jacks 23 which correspond to each other and have different apertures,

the broken rod driving mechanism 3 comprises a broken rod driving shell seat 31, a driving gear 32, a broken rod driving shaft 33 and a reset elastic sheet 34, the broken rod driving shell seat 31 is arranged at the other end of the base 1, the driving gear 32 is arranged in the broken rod driving shell seat 31 and is rotationally connected with the broken rod driving shell seat 31 through the broken rod driving shaft 33, one end of the broken rod driving shaft 33 is located outside the side wall of the broken rod driving shell seat 31, the other end of the broken rod arm 21 is inserted into the broken rod driving shell seat 31, a tooth groove 211 is formed in the end of the other end of the broken rod arm 21, the tooth groove 211 of the broken rod arm 21 is meshed with the driving gear 32, the reset elastic sheet 34 is arranged in the broken rod driving shell seat 31, and two ends of the reset elastic sheet 34 are respectively fixedly connected with the bottom of the other end of the broken rod arm 21 and the bottom in the broken rod driving shell seat 31.

As shown in fig. 5, in order to play a guiding role in the process of pressing down the other end of the rod breaking arm, the rod breaking main body mechanism 2 further includes a guiding shaft 24, the other end of the rod breaking arm 21 is provided with an arc-shaped guiding hole 212, the guiding shaft 24 is arranged in the guiding hole 212 of the rod breaking arm 21 and is matched with the shaft hole thereof, and two ends of the guiding shaft 24 are fixedly connected with the side wall of the rod breaking driving housing seat 31.

As shown in fig. 4, 5, and 8, in order to facilitate installation of the rod breaking driving shaft, the rod breaking driving mechanism 3 further includes a rod breaking driving shaft seat 35, the rod breaking driving shaft seat 35 is disposed on a side wall of the rod breaking driving housing seat 31 and is fixedly connected to the rod breaking driving housing seat 31, the rod breaking driving shaft 33 is rotatably connected to the rod breaking driving shaft seat 35, and an end of the rod breaking driving shaft 33 passes through the rod breaking driving shaft seat 35. The broken rod driving shaft seat 35 is provided with a nylon ring, and the broken rod driving shaft 33 is matched with a nylon ring shaft hole, so that the rotating smoothness of the broken rod driving shaft 33 is improved.

As shown in fig. 4 and 5, in order to facilitate driving the rod breaking driving shaft to rotate and prevent the thrust application operating lever from slipping after being assembled with the rod breaking driving shaft, the rod breaking driving shaft 33 includes a polygonal shaft 331 and a rotating shaft 332 which are integrated or fixedly connected with each other, the outer diameter of the polygonal shaft 331 is greater than that of the rotating shaft 332, the driving gear 32 is sleeved on the rotating shaft 332, the polygonal shaft 331 is rotatably connected with the rod breaking driving shaft seat 35, and the end of the free end of the polygonal shaft 331 penetrates through the rod breaking driving shaft seat 35. When the multi-edge driving device is used, the operating rod can be sleeved on the multi-edge shaft 331, so that the rotating shaft 332 can be driven to rotate more conveniently.

As shown in fig. 4 and 8, a limit stop shaft 36 is provided on the rod breaking driving housing seat 31 and near the rod breaking driving shaft 33 for limiting the rotation angle of the driving gear 32. The operating rod is sleeved on the multi-edge shaft 331, and after the operating rod is rotated by applying force, the operating rod can be abutted against the limit stop shaft 36 to limit the limit stop shaft after rotating for a certain angle.

As shown in fig. 1, the device is convenient to carry and protects the whole mechanism of each part, and further comprises a pulling cover 5, wherein the pulling cover 5 covers the periphery of the rod breaking main body mechanism 2 and the rod breaking driving mechanism 3, and the pulling cover 5 is detachably connected with the base 1.

As shown in fig. 4 and 8, in order to connect the pulling cover 5 with the base 1 in a quick positioning manner, the base 1 is provided with a positioning step 11, the pulling cover 5 is arranged on the positioning step 11 of the base 1, and the pulling cover 5 is detachably connected with the base 1 through a connecting mechanism 6.

As shown in fig. 2, in order to facilitate the positioning connection of the lifting cover 5 and the base 1, two ends of the base 1 are respectively provided with a connecting mechanism 6, the lifting cover 5 is detachably connected with the base 1 through the connecting mechanism 6, two ends of the lifting cover 5 are respectively provided with a positioning connecting hole, the connecting mechanism 6 comprises a locking rod 61, a linkage rod 62, a guiding and positioning rod 63 and a spring 64, two ends of the base 1 are respectively provided with two spring installation cavities, each spring installation cavity is internally provided with a spring 64 and a guiding and positioning rod 63, two ends of the spring 64 respectively abut against the inner wall of the spring installation cavity of the base 1 and one end of the guiding and positioning rod 63, the other end of the guiding and positioning rod 63 is located at the outer side of the base 1, the linkage rod 62 is arranged at the bottom of the base 1, the linkage rod 62 is fixedly connected with the guiding and positioning rod 63 through a fastener, the locking rod 61 is fixedly connected with the linkage rod 62, and the free end of the locking rod 61 is positioned at the outer side of the end part of the base 1, the locking rod 61 is driven, the locking rod 61 simultaneously drives the linkage rod 62 and the guide positioning rod 63 to axially move, so that after the spring 64 is compressed, the other end of the guide positioning rod 63 is separated from the positioning connecting hole of the lifting cover 5, otherwise, after the spring 64 is reset, the other end of the guide positioning rod 63 passes through the positioning connecting hole of the lifting cover 5, so that the lifting cover 5 and the base 1 are locked into a whole. Of course, the connection structure between the pulling-up cover 5 and the base 1 is not limited to the above description, and the pulling-up cover 5 and the base 1 may also be connected by a connection buckle.

As shown in fig. 1 and 6, in order to facilitate lifting or sterilizing, the lifting cover 5 comprises a lifting cover shell 51 and a lifting handle 52, the lifting handle 52 is arranged at the top of the lifting cover shell 51 and connected with the lifting cover shell, and the lifting cover shell 51 and the broken rod driving shell seat 31 are provided with a plurality of weight-reducing sterilization holes 7. The top of the lifting cover 5 is provided with a handle connecting seat 56, and the lifting handle 52 is rotatably connected with the handle connecting seat 56.

As shown in fig. 6 and 7, the pulling cover 5 includes a first pulling cover body 53, a second pulling cover body 54 and a U-shaped connecting skeleton 55, the first pulling cover body 53 and the second pulling cover body 54 are connected by the connecting skeleton 55 to form a cover body structure with an opening at the bottom, the connecting skeleton 55 is arranged inside the first pulling cover body 53 and the second pulling cover body 54 and located at the joint, and the connecting skeleton 55 and the handle connecting seat 56 are also provided with weight-reducing disinfection holes 7 for further reducing the self weight of the pulling cover 5 and facilitating subsequent disinfection.

As shown in fig. 8, in order to observe the broken rod length of the connecting rod, the broken rod measurement limiting mechanism 4 is further included, the broken rod measurement limiting mechanism 4 includes a broken rod measuring rod 41 and an adjusting rod 42, one end of the broken rod arm 21 is rotatably connected with the broken rod arm base 22 through a connecting shaft 25, the connecting shaft 25 is provided with a connecting screw hole, one end of the broken rod measuring rod 41 is screwed into the connecting screw hole of the connecting shaft 25 to be connected with the connecting shaft 25 into a whole, the adjusting rod 42 is sleeved on the broken rod measuring rod 41 to be in sliding fit with the broken rod measuring rod 41, scales are arranged on the rod body of the broken rod measuring rod 41, the adjusting rod 42 is provided with a limiting needle 421 integrated with or fixedly connected with the adjusting rod 42, and when the adjusting rod 42 slides along the broken rod measuring rod 41, the limiting needle 421 can abut against the end of the connecting rod. Before the broken rod measuring and limiting mechanism 4 is used, the broken rod measuring and limiting mechanism can be connected to the base 1 through threads, so that the broken rod measuring and limiting mechanism is convenient to store, the overall dimension of the lifting cover is reduced, and the small overall occupied space is ensured. When the broken rod measuring rod is used, the broken rod measuring rod 41 can be directly disassembled from the base 1 and then is in threaded connection with the connecting shaft 25, and the use is very convenient.

When the invention is used, one end of the connecting rod is inserted into the corresponding connecting rod jack 23 according to the outer diameter of the connecting rod, the broken rod measuring and limiting mechanism 4 is unscrewed from the base 1, the broken rod measuring rod 41 is in threaded connection with the connecting shaft 25, the length of the part of the connecting rod inserted into the connecting rod jack of the broken rod arm is the breaking length according to the requirement of the operation, the accurate breaking length of the connecting rod can be known from the scale on the broken rod measuring rod 41, the limiting needle 421 is abutted against the end part of the connecting rod to prevent the connecting rod from moving in the rod breaking process, the stress application operating rod 8 is sleeved on the multi-edge shaft 331 of the broken rod driving shaft 33, the broken rod driving shaft 33 drives the driving gear 32 to rotate, the driving gear 32 is engaged with the tooth space 212 of the broken rod arm 21, the other end of the broken rod arm 21 moves downwards and drives the reset elastic sheet 34 to be in a downward pressing state, and continuously pressurizing until the joint of the connecting rod in the connecting rod inserting hole 23 of the rod breaking arm 21 and the connecting rod in the connecting rod inserting hole 23 of the rod breaking arm base 22 is broken to complete the rod breaking of the connecting rod, and finally, resetting the rod breaking arm 21 by means of the elastic force of the resetting elastic sheet 34.

The broken rod assembly adopting the invention has the advantages that: the invention increases the moment, even if the connecting rod with thicker outer diameter is broken, the whole connecting rod can not rotate in the process of driving the broken rod driving shaft to rotate by applying force, compared with the rod breaking device in the prior art, the invention prolongs the length of the force arm, saves more labor in operation, does not need to stably and integrally move the connecting rod without rotating the driving shaft to break the rod as the operator needs in the prior art, and can lead the operation to be more labor-saving and convenient.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.