CN210811236U

CN210811236U - Universal self-locking type pressurizing spreader

Info

Publication number: CN210811236U
Application number: CN201921084605.8U
Authority: CN
Inventors: 严武; 宋月华
Original assignee: Shanghai Kinetic Medical Co Ltd
Current assignee: Shanghai Kinetic Medical Co Ltd
Priority date: 2019-07-11
Filing date: 2019-07-11
Publication date: 2020-06-23
Anticipated expiration: 2029-07-11

Abstract

The utility model discloses an universal self-locking type pressurization spreader, include: two arm structures capable of relatively moving along a first direction, namely a first arm structure for installing a first guide pin and a second arm structure for installing a second guide pin; the first arm structure drives the first guide pin to rotate on a first plane, and the first guide pin rotates on a second plane on the first arm structure; relative movement of the two arm structures, the first arm structure driving the first guide pin to rotate, and more than one of the first guide pin rotating motion in the first arm structure are self-locking motion. The utility model discloses realize the strutting or the pressurization of two skeletons, can realize the position adjustment of skeleton again, the doctor that performs the operation need not the operation assistant alright accomplish whole fracture alone and reset the operation, laborsaving and practice thrift the human cost, more excellent, the operation is easily operated, is realized and saves time to shorten the operation time.

Description

Universal self-locking type pressurizing spreader

Technical Field

The utility model relates to a skeleton struts presser technical field, indicates especially an universal self-locking type pressurization and struts ware.

Background

The first step in the fracture operation is to reset, because of the muscle, tendon and ligament attached to the bone, thereby have certain pulling force, after the fracture, the fracture department takes place the dislocation, need strut or pressurize this moment, stretch muscle, tendon and ligament could make the fracture department butt joint of dislocation coincide, nevertheless realign and need the manpower directly to pull or rectify aversion and angle with the help of outside traction tool, after the correction, still need stabilize and maintain the butt joint position, otherwise appear implanting the steel sheet easily, the butt joint of fracture department is improper, thereby the long-term growth of skeleton leads to the deformity. The existing cervical vertebra distracter commonly used in the market can only be used for cervical vertebra parts and can only realize the distraction effect, in the traumatic fracture operation, a tool used for resetting is a bone holding forceps, two sides of the fracture part are clamped by the two bone holding forceps and then pulled and butted, the operation needs two persons to realize (a doctor doing the operation and an operation assistant which needs to hold the two forceps all the time), and the operation is very labor-consuming and wastes manpower; meanwhile, the head of the bone holding forceps is large, so that the steel plate cannot be implanted when the bone holding forceps are clamped, repeated adjustment and resetting are needed, and the operation is complex and time-consuming.

Disclosure of Invention

The utility model aims at providing an it is universal from locking-type pressurization spreader realizes strutting or the pressurization of two skeletons, can realize the position adjustment of skeleton again, and the doctor that performs the operation need not the operation assistant alright accomplish whole fracture operation that resets alone, laborsaving and practice thrift the human cost, and is more excellent, and the operation is easily operated, is realized and saves time to shorten the operation time.

The utility model provides a technical scheme as follows:

a universal self-locking pressure spreader comprising:

two arm structures capable of relatively moving along a first direction, namely a first arm structure for installing a first guide pin and a second arm structure for installing a second guide pin;

the first arm structure drives the first guide pin to rotate on a first plane, and the first guide pin rotates on a second plane on the first arm structure;

and more than one of the relative movement of the two arm structures, the rotation movement of the first arm structure driving the first guide pin and the rotation movement of the first guide pin in the first arm structure is self-locking movement.

In the technical scheme, two arm structures (a first arm structure and a second arm structure) for installing guide pins (a first guide pin and a second guide pin) can move relatively far away or close to each other, so that the distraction or pressurization of two bones connected with the guide pins is realized; the first arm structure provided with the first guide pin can drive the first guide pin to rotate, and the first guide pin can also rotate in the first arm structure, so that the bone reset operation connected with the first guide pin is realized by the multi-angle and multi-direction rotation of the first guide pin, the butt joint goodness of two bones is ensured, and the butt joint of the two bones is accurate; more excellent, the auto-lock can be realized to above-mentioned operation to make at least one step in the above-mentioned step can maintain the state of setting for all the time, avoid appearing the mistake and bump and lead to this operation inefficacy to arouse adverse consequence even (adjust the skeleton position repeatedly in order to guarantee the butt joint accurate), be favorable to a series of operations such as the implantation of steel sheet, skeleton are dragged, skeleton butt joint, because the utility model discloses can realize strutting or the pressurization of two skeletons, can realize the position control of skeleton again, the doctor that performs the operation need not the operation assistant alright accomplish whole fracture reduction of replacement operation alone, laborsaving and practice thrift the human cost, more excellent, the operation is easily operated, is realized and is saved time, thereby shortens operation.

Further preferably, the first arm structure comprises a tooth holder, a rotating arm, and a first secondary rotating arm; the rotating arm is axially connected with the tooth holder, and a first tooth surface and a second tooth surface which are in meshed connection are arranged at the contact position of the tooth holder and the rotating arm, wherein the first tooth surface is arranged on the tooth holder, and the second tooth surface is arranged on the rotating arm; the first tooth surface and the second tooth surface are positioned on a first plane; the first guide pin is rotatably arranged on the first secondary rotating arm; and/or the first secondary rotating arm is rotatably arranged on the rotating arm.

Among this technical scheme, realize the rotation that first arm structure drove first guide pin through intermeshing's toothholder and swinging boom, realize first guide pin in the rotation of first arm structure through the rotation of first guide pin or first second order swinging boom, the meshing rotates steadily, the transmission is reliable. The first guide pin has various realization modes in the first arm structure, and can be specifically arranged according to actual requirements.

Further preferably, the first secondary rotating arm is rotatably arranged on the rotating arm, and the first guide pin is arranged on the first secondary rotating arm, so that the first secondary rotating arm drives the first guide pin to rotate on the rotating arm; a third tooth surface and a fourth tooth surface which are mutually meshed and connected are arranged at the contact position of the first secondary rotating arm and the rotating arm, wherein the third tooth surface is arranged on the rotating arm, and the fourth tooth surface is arranged on the first secondary rotating arm; the first secondary rotating arm is provided with a first self-locking mechanism far away from the fourth tooth surface, the first self-locking mechanism comprises a first pressing piece connected to the first secondary rotating arm in a shaft mode, the end face, close to one side of the first secondary rotating arm, of the first pressing piece is a first cambered surface, and when the first cambered surface is in contact with the first secondary rotating arm, the third tooth surface and the fourth tooth surface are abutted along the axis direction to achieve self-locking of the first secondary rotating arm; when the first cambered surface is far away from the first secondary rotating arm, the first secondary rotating arm can rotate on the rotating arm.

In this technical scheme, realize the locking to first secondary rotating arm through first self-locking mechanism to the skeleton position after maintaining and guaranteeing first guide pin adjustment is unchangeable, guarantees its precision with the butt joint of another skeleton, also guarantees simultaneously that two skeletons are butt jointed and are accomplished the difficult displacement phenomenon that takes place of butt joint state when the steel sheet inserts after the completion.

Further preferably, the rotating arm is screwed with a self-locking nut; when the self-locking nut is rotated along the self-locking direction, the second tooth surface is close to the first tooth surface, so that the first tooth surface and the second tooth surface are mutually abutted to realize the self-locking of the rotating arm; when the self-locking nut is rotated along the unlocking direction, the rotating arm can rotate on the tooth holder.

Among this technical scheme, realize the pivoted auto-lock of swinging boom in the toothholder through the auto-lock nut to the skeleton position after maintaining and guaranteeing first guide pin adjustment is unchangeable, guarantees its precision with the butt joint of another skeleton, also guarantees simultaneously that two skeletons are butt jointed to accomplish the back and when the steel sheet inserts the difficult displacement phenomenon that takes place of butt joint state.

Further preferably, the second arm structure drives the second guide pin to rotate on a third plane.

In this technical scheme, the second guide pin also can be rotary motion in the third plane to realize the multi-angle and diversified adjustment of first guide pin and second guide pin, and then improved in the operation and adjusted the position of required one or two skeletons according to actual need, make operation flexibility greatly increased, thereby reduce the operation degree of difficulty (because there may be uncertain regulation which skeleton before the operation, like this, can be according to actual conditions adjustment easily adjust or to the minimum skeleton of patient's injury), avoid repeated operation.

Further preferably, the second arm structure comprises a moving arm and a second secondary rotating arm; the second secondary rotating arm is connected with the moving arm in a shaft mode, and a fifth tooth surface and a sixth tooth surface are arranged at the contact position of the second secondary rotating arm and the moving arm, wherein the fifth tooth surface is arranged on the moving arm, and the sixth tooth surface is arranged on the second secondary rotating arm; the second guide pin is arranged on the second secondary rotating arm.

In the technical scheme, the second arm structure drives the second guide pin to rotate through the mutually meshed moving arm and the second secondary rotating arm, and the meshing rotation is stable and the transmission is reliable.

Further preferably, the second arm structure drives the second guide pin to rotate in a self-locking manner.

In the technical scheme, the rotation motion can realize self-locking, so that the rotation of the second guide pin can always maintain the set state, the operation failure and even adverse consequences caused by mistaken collision are avoided, a series of operations such as steel plate implantation, bone dragging, bone butt joint and the like are facilitated, and the operation difficulty is reduced.

Further preferably, the sliding structure comprises a gear and a rack which are meshed and connected with each other; one of the two arm structures is fixed at the first end of the rack, the gear is arranged at the other of the two arm structures, and the arm structure provided with the gear is sleeved on the rack, so that the arm structure provided with the gear can do reciprocating motion which is far away from or close to the arm structure without the gear along the rack.

In the technical scheme, the mutual movement of the two arm structures is realized through the meshed rack and the meshed gear, so that the linearity and the stability of the mutual movement of the two arm structures are ensured, and the damage to tissues near the bones when the two bones are spread or pressurized is reduced.

Further preferably, the arm structure provided with the gear is the second arm structure, the second arm structure further comprises a third self-locking mechanism, and the third self-locking mechanism comprises a pawl trigger, a rotating shaft and a torsion spring; the pawl trigger is provided with a first pawl and a second pawl on two sides of the gear respectively, and the pawl trigger is installed on the second arm structure through the rotating shaft and the torsion spring; the gear is restricted to rotate toward the first pawl side when the pawl trigger is pressed so that the first pawl is caught in the gear; the gear is restricted to rotate toward the second pawl side when the pawl trigger is pressed so that the second pawl is caught in the gear; or the arm structure provided with the gear is the second arm structure, the second arm structure further comprises a third self-locking mechanism, and the third self-locking mechanism comprises a pawl trigger, a rotating shaft and a torsion spring; the pawl trigger is provided with a first pawl and a second pawl on two sides of the gear respectively, and the pawl trigger is installed on the second arm structure through the rotating shaft and the torsion spring; the gear is restricted to rotate toward the second pawl side when the pawl trigger is pressed so that the first pawl is caught in the gear; when the click trigger is pressed so that the second click is caught in the gear, the gear is restricted to be rotatable toward the first click side.

Among this technical scheme, realize right through the pawl the utility model discloses an irreversibility of strutting or pressurization action, the greatly reduced operation in-process leads to the repetition to strut or the incidence of pressurization action because of strutting or pressurization are reversible to shorten the operation time and reduced the operation miscellaneous degree.

Further preferably, a plurality of first guide pins with different diameter sizes are replaceably mounted to the first arm structure; and/or a plurality of second guide pins with different diameter sizes can be arranged on the second arm structure in a replaceable way.

Among this technical scheme, the utility model discloses can adopt the guide pin of different diameter sizes according to the skeleton of different grade type, thereby improve greatly the utility model discloses a practicality and application scope.

The utility model provides a pair of it is universal from locking-type pressurization spreader can bring following at least one beneficial effect:

1. in the utility model, the two arm structures (the first arm structure and the second arm structure) for installing the guide pins (the first guide pin and the second guide pin) can move away from or close to each other relatively, thereby realizing the distraction or pressurization of two bones connected with the guide pins; the first arm structure provided with the first guide pin can drive the first guide pin to rotate, and the first guide pin can also rotate in the first arm structure, so that the bone reset operation connected with the first guide pin is realized by the multi-angle and multi-direction rotation of the first guide pin, the butt joint goodness of two bones is ensured, and the butt joint of the two bones is accurate; more excellent, the auto-lock can be realized in the above-mentioned operation to make at least one step in the above-mentioned step can maintain the state of setting for all the time, avoid appearing the mistake and bump and lead to this operation inefficacy to arouse adverse consequence even (adjust the skeleton position repeatedly in order to guarantee the butt joint accurate), be favorable to the implantation of steel sheet, skeleton is dragged, a series of operations such as skeleton butt joint, because the utility model discloses can realize strutting or the pressurization of two skeletons, can realize the position control of skeleton again, the doctor that performs the operation need not the operation assistant alright accomplish whole fracture reduction of replacement operation alone, laborsaving and practice thrift the human cost, more excellent, the operation is easily operated, is realized and is saved time, thereby shortens operation.

2. In the utility model, the linear motion or the rotary motion is realized by the meshing mode, thereby ensuring the stability, the stationarity and the reliability of the transmission; more excellent, realize through a plurality of auto-lock functional unit to linear motion or rotary motion's auto-lock, injecing to guaranteed the constancy of operation in-process to the skeleton state, guaranteed the precision of two skeleton adjustment back dockings, the implantation of the later stage steel sheet of being convenient for simultaneously, thereby guarantee the success rate of fracture reduction surgery.

Drawings

The above features, technical features, advantages and modes of realisation of the universal self-locking pressure spreader will be further described in the following, in a clearly understandable manner, with reference to the accompanying drawings, which illustrate preferred embodiments.

Fig. 1 is a schematic diagram of an explosion diagram of a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of a second embodiment of the present invention;

fig. 3 is a schematic structural view of an embodiment of the tooth holder of the present invention;

fig. 4 is a schematic structural diagram of an embodiment of the rotating arm of the present invention;

fig. 5 is a schematic structural diagram of an embodiment of a first secondary rotating arm according to the present invention;

fig. 6 is a schematic structural view of an embodiment of the first pressing member of the present invention;

fig. 7 is a schematic structural diagram of an embodiment of the moving arm of the present invention;

FIG. 8 is a schematic structural view of one embodiment of the pawl trigger of the present invention;

fig. 9 is a schematic structural view of an embodiment of the gear of the present invention;

fig. 10 is a schematic structural view of an embodiment of the rack according to the present invention.

The reference numbers illustrate:

1. the first pawl, 202, the second pawl, 203, the first shaft hole, 3, the torsion spring, 4, the moving arm, 401, the slideway, 402, the gear shaft seat, 4021, the second shaft hole, 4022, the third shaft hole, 403, the fifth tooth surface, 404, the fourth shaft hole, 405, the through groove, 5, the gear, 51, the fifth shaft hole, 6, the rack, 61, the sleeve joint part, 7, the rotating handle, 8, the limit nut, 9, the self-locking nut, 10, the rotating arm, 101, the shaft column, 1011, the thread, 102, the second tooth surface, 103, the third tooth surface, 104, the sixth shaft hole, 11, the tooth seat, 111, the first tooth surface, 112, the sleeve opening, 12, the pin shaft, 13, the first pressing piece, 131, the first arc surface, 132, the pin shaft hole, 14, the rotating shaft, 15, the first secondary rotating arm, 151, the fourth tooth surface, 152, the seventh shaft hole, 153, the threaded hole, 16, the first guide pin sleeve, 17, the first guide pin sleeve, 18. the second secondary rotating arm 19, the second guide pin shaft sleeve 20, the second pressing piece 21 and the second guide pin.

Detailed Description

In order to more clearly illustrate embodiments of the present invention or technical solutions in the prior art, specific embodiments of the present invention will be described below with reference to the accompanying drawings. It is obvious that the drawings in the following description are only examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be obtained from these drawings without inventive effort.

For the sake of simplicity, only the parts relevant to the present invention are schematically shown in the drawings, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".

In this context, it is to be understood that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In one embodiment, as shown in fig. 1-10, a universal self-locking pressure spreader comprises: two arm structures relatively movable in a first direction, a first arm structure for mounting the first lead 16 and a second arm structure for mounting the second lead 21; the first arm structure drives the first guide pin 16 to make a rotation motion on a first plane, and the first guide pin 16 makes a rotation motion on a second plane on the first arm structure; relative movement of the two arm structures, the first arm structure driving the first guide pin 16 to rotate, and at least one of the first guide pin 16 rotating in the first arm structure is self-locking movement. In practical application, the first guide pin 16 is only required to be inserted into one bone, the second guide pin 21 is required to be inserted into the other bone, and then the first arm structure and/or the second arm structure are/is relatively far away (specifically, the first arm structure and the second arm structure can be moved away from each other; the first arm structure is not moved, the second arm structure is far away from the first arm structure; or the second arm structure is not moved, the first arm structure is far away from the second arm structure), so that the two bones can be spread; then, the adjustment of the bones is realized through the rotation motion of the first guide pin 16 so as to enable the two bones to be in butt joint, and certainly, the bones can be finely adjusted through the first guide pin 16 after the butt joint, so that the precision of the butt joint is ensured; when the first arm structure and/or the second arm structure move relatively close to each other (specifically, the first arm structure and the second arm structure can move close to each other; the first arm structure is not moved, the second arm structure is close to the first arm structure; or the second arm structure is not moved, the first arm structure is close to the second arm structure), the two bones can be pressurized, and therefore the two bones are compressed to achieve the tightness and the firmness of connection. It is worth mentioning that the first plane and the second plane may be parallel or arranged at an angle, but preferably arranged at an angle; the first direction may be parallel to the first plane (or the second plane) or may be disposed at an angle.

In the second embodiment, as shown in fig. 1-6, on the basis of the first embodiment, the first arm structure includes a tooth holder 11, a rotating arm 10, and a first secondary rotating arm 15; the rotating arm 10 is coupled to the gear base 11, and a first tooth surface 111 and a second tooth surface 102 which are engaged and connected are arranged at a contact position of the gear base 11 and the rotating arm 10, wherein the first tooth surface 111 is arranged on the gear base 11, and the second tooth surface 102 is arranged on the rotating arm 10; first tooth face 111 and second tooth face 102 lie in a first plane; the first guide pin 16 is rotatably arranged on the first secondary rotating arm 15. Of course, the first guide pin 16 can also be directly disposed on the first secondary rotating arm 15, and the first secondary rotating arm 15 is rotatably disposed on the rotating arm 10. Certainly, the first guide pin 16 is rotatably disposed on the first secondary rotating arm 15, and the first secondary rotating arm 15 is also rotatably disposed on the rotating arm 10, so that the first guide pin 16 can realize three times of rotating motion. In practical applications, when only the first guide pin 16 needs to be rotated once, one or more than two rotational motions of the plurality of rotational motions of the first guide pin 16 (one or more than one of the first guide pin 16 is rotated, the first guide pin 16 is rotated by rotating the rotating arm 10, or the first guide pin 16 is rotated by rotating the first secondary rotating arm 15) can be operated; when the first guide pin 16 needs to be rotated more than twice, more than two rotations of the first guide pin 16 can be operated (more than two of the rotation of the first guide pin 16 by rotating the first guide pin 16, the rotation of the first guide pin 16 by rotating the rotary arm 10, or the rotation of the first guide pin 16 by rotating the first secondary rotary arm 15).

In the third embodiment, as shown in fig. 1-6, on the basis of the second embodiment, the first secondary rotating arm 15 is rotatably disposed on the rotating arm 10, and the first guide pin 16 is disposed on the first secondary rotating arm 15, so that the first secondary rotating arm 15 drives the first guide pin 16 to rotate on the rotating arm 10; a third tooth surface 103 and a fourth tooth surface 151 which are meshed and connected with each other are arranged at the contact position of the first secondary rotating arm 15 and the rotating arm 10, wherein the third tooth surface 103 is arranged on the rotating arm 10, and the fourth tooth surface 151 is arranged on the first secondary rotating arm 15; a first self-locking mechanism is arranged on the first secondary rotating arm 15 far away from the fourth tooth surface 151, the first self-locking mechanism comprises a first pressing piece 13 connected to the first secondary rotating arm in a shaft mode, the end face, close to one side of the first secondary rotating arm 15, of the first pressing piece 13 is a first cambered surface 131, and when the first cambered surface 131 is in contact with the first secondary rotating arm 15, the third tooth surface 103 and the fourth tooth surface 151 are abutted along the axis direction to achieve self-locking of the first secondary rotating arm 15; when the first arc surface 131 is far away from the first secondary rotating arm 15, the first secondary rotating arm 15 can rotate on the rotating arm 10. Preferably, the first pressing piece 13 is rotatably disposed on the rotating arm 10 through a pin shaft 12, the first pressing piece 13 is provided with a pin shaft hole 132 corresponding to the pin shaft 12, so that the end portion of the first pressing piece 13 provided with the first arc surface 131 abuts against the first secondary rotating arm 15, the first pressing piece 13 is rotated to enable the first arc surface 131 to abut against or keep away from the first secondary rotating arm 15, and self-locking and unlocking of the first secondary rotating arm 15 are achieved. Preferably, the first guide pin 16 is disposed on the first secondary rotating arm 15 through the first guide pin bushing 17, the first guide pin 16 penetrates through the inner hole of the first guide pin bushing 17, so that the tip of the first guide pin 16 is close to one side of the bone, the other end of the first guide pin 16 is connected to a drilling machine for drilling the first guide pin 16 into the bone, and the first guide pin 16 is in clearance fit with the first guide pin bushing 17. Preferably, the first guide pin sleeve 17 is detachably connected with the first secondary rotating arm 15, such as by screwing, that is, the first guide pin sleeve 17 is provided with external threads, and the first secondary rotating arm 15 is provided with a threaded hole 153, so that the first guide pin sleeve 17 and the first secondary rotating arm 15 are detachably connected by screwing; for example, the first guide pin shaft sleeve 17 can be mounted on the first secondary rotating arm 15 through a bolt and a nut; for example, the first guide pin sleeve 17 can be mounted on the first secondary rotating arm 15 by a buckle. Of course, the first guide pin sleeve 17 can also be fixedly connected with the first secondary rotating arm 15, such as welded or integrally formed. Preferably, the first guide pin axle sleeve 17 that a plurality of hole sizes are different can be replaced and install in first two-stage swinging boom 15 to realize that the different first guide pin 16 of a plurality of diameter sizes can be replaced and install in first arm structure, thereby realize the operation that resets to unidimensional skeleton, reduce the utility model discloses an unoccupied rate improves the utility model discloses a rate of utilization, thereby reduce the utility model discloses a use cost.

In the fourth embodiment, as shown in fig. 1-6, on the basis of the second or third embodiment, a self-locking nut 9 is screwed on the rotating arm 10; when the self-locking nut 9 is rotated along the self-locking direction, the second tooth surface 102 is close to the first tooth surface 111, so that the first tooth surface 111 and the second tooth surface 102 are mutually abutted to realize the self-locking of the rotating arm 10; when the self-locking nut 9 is rotated in the unlocking direction, the rotating arm 10 is allowed to rotate on the tooth holder 11. Preferably, as shown in fig. 4, the rotating arm 10 includes a shaft column 101 that is coupled to the gear seat 11, an outer side wall of one end of the shaft column 101 is provided with a thread 1011 that is screwed with the self-locking nut 9, the other end of the shaft column 101 protrudes in a radial direction to form a toothed ring, an end surface of the toothed ring near one side of the gear seat 11 is provided with a second toothed surface 102, a toothed plate that is provided with a third toothed surface 103 protrudes in a direction of the shaft column 101 toward one side of the toothed ring along an axial direction thereof, and a surface of the toothed plate near one side of the first secondary rotating arm 15 is provided with the third toothed surface 103. Preferably, the axis of the third tooth surface 103 is disposed at an angle (perpendicular or acute) to the axis of the second tooth surface 102, i.e., the second tooth surface 102 is disposed coaxially with the shaft 101, while the axis of the third tooth surface 103 is disposed at an angle to the axis of the shaft 101. Preferably, the end of the shaft column 101 on the side away from the second tooth surface 102 is provided with a limit nut 8, and the limit nut 8 and the self-locking nut 9 are provided with mutually abutted steps, so that the self-locking nut 9 is prevented from falling off from the shaft column 101. Preferably, the axis of the third tooth surface 103 passes through the line on which the central axis of the column 101 is located. Preferably, as shown in fig. 5, an axis of the fourth tooth surface 151 and an axis of the threaded hole 153 are disposed at an angle (perpendicular or an acute angle), and the threaded hole 153 and the fourth tooth surface 151 are respectively disposed at two ends of the first secondary rotating arm 15, and preferably, an outer contour of the first secondary rotating arm 15 is arc-shaped. Preferably, as shown in fig. 1, 2, 4 and 5, the third tooth surface 103 and the fourth tooth surface 151 are respectively provided with a sixth axial hole 104 and a seventh axial hole 152 coaxially arranged at the center position, wherein the sixth hole is provided at the third tooth surface 103, and the seventh hole is provided at the fourth tooth surface 151, so that the first secondary rotating arm 15 is coupled to the rotating arm 10 by sequentially penetrating the sixth axial hole 104 and the seventh axial hole 152 through the rotating shaft 14, and the fourth tooth surface 151 and the third tooth surface 103 are engaged. Preferably, the rotation shaft 14 is preferably a self-locking knob shaft. It should be noted that the self-locking (self-locking and unlocking achieved by the first self-locking mechanism) of the first secondary rotating arm 15 and the self-locking (self-locking and unlocking achieved by the matching of the self-locking nut 9 and the screw thread) of the rotating arm 10 can be interchanged, and the self-locking and unlocking modes of the first secondary rotating arm 15 and the rotating arm 10 can be the same or different.

In the fifth embodiment, as shown in fig. 1, 2, 5, 6 and 7, based on the first, second, third or fourth embodiments, the second arm structure drives the second guide pin 21 to perform a rotation motion in the third plane. Preferably, the second guide pin 21 performs a rotation motion on the second arm structure in the fourth plane. Preferably, the second arm structure drives one or more of the rotation motion of the second guide pin 21 and the rotation motion of the second guide pin 21 in the rotation motion of the second arm structure to be a self-locking motion. Preferably, the second arm structure comprises a moving arm 4 and a second secondary rotating arm 18; the second secondary rotating arm 18 is coupled to the moving arm 4, and a fifth tooth surface 403 and a sixth tooth surface are arranged at a contact position of the second secondary rotating arm 18 and the moving arm 4, wherein the fifth tooth surface 403 is arranged on the moving arm 4, and the sixth tooth surface is arranged on the second secondary rotating arm 18; the second guide pin 21 is arranged on the second secondary rotating arm 18. Preferably, a second self-locking mechanism is arranged on the second-stage rotating arm 18 away from the sixth tooth surface, the second self-locking mechanism comprises a second pressing piece 20 connected to the second-stage rotating arm 18 in a shaft mode, the end face, close to the second-stage rotating arm 18, of the second pressing piece 20 is a second arc surface, and when the second arc surface is connected with the second-stage rotating arm 18, the fifth tooth surface 403 and the sixth tooth surface are abutted in the axis direction to achieve self-locking of the second-stage rotating arm 18; when the second arc surface is far away from the second secondary rotating arm 18, the second secondary rotating arm 18 can rotate on the moving arm 4. Preferably, the second self-locking mechanism and the first self-locking mechanism have the same structure, that is, the first pressing member 13 and the second pressing member 20 have the same structure. Preferably, the first secondary rotating arm 15 and the second secondary rotating arm 18 may also be similar in structure. Certainly, in practical application, the structures of the second self-locking mechanism and the first self-locking mechanism may also be different, that is, the structures of the first pressing piece 13 and the second pressing piece 20 are different; the first secondary rotating arm 15 and the second secondary rotating arm 18 may also be different in structure. It is worth to be noted that the self-locking (self-locking and unlocking by the second self-locking mechanism) of the second-stage rotating arm 18 and the self-locking (self-locking and unlocking by the matching of the self-locking nut 9 and the thread 1011) of the rotating arm 10 can be interchanged, and the self-locking and unlocking modes of the second-stage rotating arm 18 and the rotating arm 10 can be the same or different. Since the first guide pin 16 and the second guide pin 21 are both connected to the bone, the first arm structure and the second arm structure may be the same or different, and the structural components of the first arm structure and the second arm structure may be interchangeable, but shall also belong to the scope of the present invention.

Preferably, the second guide pin 21 is disposed on the second secondary rotation arm 18 through the second guide pin bushing 19, the second guide pin 21 penetrates through an inner hole of the second guide pin bushing 19, so that a tip of the second guide pin 21 is close to one side of the bone, the other end of the second guide pin 21 is connected to a drilling machine for drilling the second guide pin 21 into the bone, and the second guide pin 21 is in clearance fit with the second guide pin bushing 19. Preferably, the second guide pin sleeve 19 is detachably connected with the second secondary rotating arm 18, for example, by screwing, that is, the second guide pin sleeve 19 is provided with external threads, and the second secondary rotating arm 18 is provided with a threaded hole 153, so that the second guide pin sleeve 19 and the second secondary rotating arm 18 are detachably connected by screwing; for example, the second guide pin sleeve 19 can be mounted on the second secondary rotating arm 18 through a bolt and a nut; for example, the second guide pin sleeve 19 can be mounted on the second secondary rotating arm 18 by a snap fit. Of course, the second guide pin sleeve 19 can also be fixedly connected to the second secondary rotating arm 18, such as welded or integrally formed. Preferably, the second guide pin axle sleeve 19 that a plurality of hole sizes are different can be replaced and install in second grade swinging boom 18 to realize that the different second guide pin 21 of a plurality of diameter sizes can be replaced and install in second arm structure, thereby realize the operation that resets to unidimensional skeleton, reduce the utility model discloses an unoccupied rate improves the utility model discloses a rate of utilization, thereby reduce the utility model discloses a use cost.

In the sixth embodiment, as shown in fig. 1 to 10, on the basis of the first, second, third, fourth or fifth embodiment, the sliding device further comprises a sliding structure, wherein the sliding structure comprises a gear 5 and a rack 6 which are meshed and connected with each other; one of the two arm structures is fixed at the first end of the rack 6, the gear 5 is arranged at the other of the two arm structures, and the rack 6 is sleeved with the arm structure provided with the gear 5, so that the arm structure provided with the gear 5 can do reciprocating motion far away from or close to the arm structure not provided with the gear 5 along the rack 6. Preferably, the arm structure provided with the gear 5 is a second arm structure, the second arm structure further comprises a third self-locking mechanism, and the third self-locking mechanism comprises a pawl trigger 2, a rotating shaft 1 and a torsion spring 3; the pawl trigger 2 is respectively provided with a first pawl 201 and a second pawl 202 at two sides of the gear 5, and the pawl trigger 2 is arranged on the second arm structure through a rotating shaft 1 and a torsion spring 3; when the pawl trigger 2 is pressed so that the first pawl 201 catches in the gear 5, the gear 5 is restricted to be rotatable toward the first pawl 201 side but not toward the second pawl 202 side; when the pawl trigger 2 is pressed so that the second pawl 202 catches in the gear 5, the gear 5 is restricted to be rotatable toward the second pawl 202 side but not toward the first pawl 201 side. Preferably, as shown in fig. 3, the tooth holder 11 is sleeved on an end portion of one end of the rack 6, preferably, the tooth holder 11 is provided with a sleeve opening 112, an end portion of one side of the rack 6, which is far away from the second arm structure, is provided with a sleeve opening 61 (as shown in fig. 10), and the sleeve opening 112 is tightly fitted and fixed with the sleeve opening 61. As shown in fig. 7, the moving arm 4 is provided with a slide 401 corresponding to the rack 6, so that the rack 6 penetrates through the slide 401 to realize the sliding of the moving arm 4 on the rack 6; the shift arm 4 is equipped with gear shaft seat 402 that is used for installing gear 5, gear shaft seat 402 is including two axletrees of relative setting, make 5 coupling of gear between two axletrees, a rotation axis runs through gear 5's fifth shaft hole 51 and realizes gear 5 rigid coupling in the axis of rotation, this axis of rotation runs through in proper order and locates second shaft hole 4021 on two axletrees and realize 5 coupling of gear in shift arm 4, shift arm 4 is equipped with logical groove 405 corresponding to gear 5's position, thereby realize that gear 5 is connected with the meshing of rack 6. The two shaft plates are respectively provided with a third shaft hole 4022 which are oppositely arranged, and the rotating shaft 1 is axially connected with the third shaft hole 4022. Preferably, a fourth shaft hole 404 is formed in the middle of the fifth tooth surface 403, an eighth shaft hole coaxially formed with the fourth shaft hole 404 is formed in the second-stage rotating arm 18, and a rotating shaft 14 penetrates through the fourth shaft hole 404 and the eighth shaft hole to rotatably mount the second-stage rotating arm 18 on the moving arm 4. Preferably, the rotation shaft 14 is a preferably self-locking knob shaft. As shown in fig. 8, the position of the pawl trigger 2 corresponding to the third shaft hole 4022 is provided with a first shaft hole 203, so that the rotating shaft 1 penetrates through the first shaft hole 203 and the two third shaft holes 4022, thereby realizing the self-locking coupling of the pawl trigger 2 to the moving arm 4. Preferably, the side of the rotating shaft away from the skeleton is provided with a polygonal screw hole, and a rotating handle 7 matched with the polygonal screw hole can realize the rotation of the gear 5 through the polygonal screw hole, so that the second arm structure is close to or far away from the first arm structure. Preferably, the end of the rotating handle 7 on the side away from the gear 5 is provided with a friction surface for the human body to hold. It should be noted that the rotating shaft and the gear 5 may be integrally formed or tightly fitted. In practical applications, the first pawl 201 may also limit the movement of the moving arm 4 to the side close to the second pawl 202 and not to the side of the first pawl 201, and the second pawl 202 limits the movement of the moving arm 4 to the side close to the first pawl 201 and not to the side of the second pawl 202. The first lead 16 and the second lead 21 can be the same or different in diameter size and the first lead sleeve 17 and the second lead sleeve 19 can be the same or different in configuration. The first lead 16 and the second lead 21 can be hinged or otherwise secured to the arm structure. The first tooth surface 111, the second tooth surface 102, the third tooth surface 103, the fourth tooth surface 151, the fifth tooth surface 403 and the sixth tooth surface may be ring teeth, taper teeth, bevel teeth or the like, and the central angles of the first tooth surface 111, the second tooth surface 102, the third tooth surface 103, the fourth tooth surface 151, the fifth tooth surface 403 and the sixth tooth surface may range from any value of 0 to 360 degrees, excluding 0 degrees and including 360 degrees; the first tooth surface 111, the second tooth surface 102, the third tooth surface 103, the fourth tooth surface 151, the fifth tooth surface 403, and the sixth tooth surface may be a ring tooth, a taper tooth, a bevel tooth, or the like, and the types of the first tooth surface 111, the second tooth surface 102, the third tooth surface 103, the fourth tooth surface 151, the fifth tooth surface 403, and the sixth tooth surface may be the same or different.

It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a universal self-locking type pressurization spreader which characterized in that includes:

2. The universal self-locking pressure spreader according to claim 1, wherein:

the first arm structure comprises a tooth holder, a rotating arm and a first secondary rotating arm;

the rotating arm is axially connected with the tooth holder, and a first tooth surface and a second tooth surface which are in meshed connection are arranged at the contact position of the tooth holder and the rotating arm, wherein the first tooth surface is arranged on the tooth holder, and the second tooth surface is arranged on the rotating arm; the first tooth surface and the second tooth surface are positioned on a first plane;

the first guide pin is rotatably arranged on the first secondary rotating arm.

3. The universal self-locking pressure spreader according to claim 2, wherein:

the first secondary rotating arm is rotatably arranged on the rotating arm, and the first guide pin is arranged on the first secondary rotating arm, so that the first secondary rotating arm drives the first guide pin to rotate on the rotating arm;

a third tooth surface and a fourth tooth surface which are mutually meshed and connected are arranged at the contact position of the first secondary rotating arm and the rotating arm, wherein the third tooth surface is arranged on the rotating arm, and the fourth tooth surface is arranged on the first secondary rotating arm;

the first secondary rotating arm is provided with a first self-locking mechanism far away from the fourth tooth surface, the first self-locking mechanism comprises a first pressing piece connected to the first secondary rotating arm in a shaft mode, the end face, close to one side of the first secondary rotating arm, of the first pressing piece is a first cambered surface, and when the first cambered surface is in contact with the first secondary rotating arm, the third tooth surface and the fourth tooth surface are abutted along the axis direction to achieve self-locking of the first secondary rotating arm; when the first cambered surface is far away from the first secondary rotating arm, the first secondary rotating arm can rotate on the rotating arm.

4. The universal self-locking pressure spreader according to claim 2, wherein:

the rotating arm is in threaded connection with a self-locking nut; when the self-locking nut is rotated along the self-locking direction, the second tooth surface is close to the first tooth surface, so that the first tooth surface and the second tooth surface are mutually abutted to realize the self-locking of the rotating arm; when the self-locking nut is rotated along the unlocking direction, the rotating arm can rotate on the tooth holder.

5. The universal self-locking pressure spreader according to claim 1, wherein:

the second arm structure drives the second guide pin to rotate on a third plane.

6. The universal self-locking pressure spreader according to claim 5, wherein:

the second arm structure comprises a moving arm and a second secondary rotating arm;

the second secondary rotating arm is connected with the moving arm in a shaft mode, and a fifth tooth surface and a sixth tooth surface are arranged at the contact position of the second secondary rotating arm and the moving arm, wherein the fifth tooth surface is arranged on the moving arm, and the sixth tooth surface is arranged on the second secondary rotating arm;

the second guide pin is arranged on the second secondary rotating arm.

7. The universal self-locking pressure spreader according to claim 5, wherein:

the second arm structure drives the second guide pin to rotate and is in self-locking motion.

8. The universal self-locking pressure spreader according to claim 1, further comprising:

the sliding structure comprises a gear and a rack which are meshed and connected with each other;

one of the two arm structures is fixed at the first end of the rack, the gear is arranged at the other of the two arm structures, and the arm structure provided with the gear is sleeved on the rack, so that the arm structure provided with the gear can do reciprocating motion which is far away from or close to the arm structure without the gear along the rack.

9. The universal self-locking pressure spreader according to claim 8, wherein:

the arm structure provided with the gear is the second arm structure, the second arm structure further comprises a third self-locking mechanism, and the third self-locking mechanism comprises a pawl trigger, a rotating shaft and a torsion spring; the pawl trigger is provided with a first pawl and a second pawl on two sides of the gear respectively, and the pawl trigger is installed on the second arm structure through the rotating shaft and the torsion spring;

the gear is restricted to rotate toward the second pawl side when the pawl trigger is pressed so that the first pawl is caught in the gear; when the click trigger is pressed so that the second click is caught in the gear, the gear is restricted to be rotatable toward the first click side.

10. The universal self-locking pressure spreader according to any one of claims 1 to 9, wherein:

a plurality of first guide pins with different diameter sizes can be arranged on the first arm structure in a replaceable way; and/or the presence of a gas in the gas,

a plurality of second guide pins of different diameter sizes are replaceably mounted to the second arm structure.