CN217860981U - Snap ring assembly fixture - Google Patents

Abstract

The utility model belongs to the technical field of the erecting tool technique and specifically relates to a snap ring assembly fixture, including strutting axle and bush, it includes the axostylus axostyle and sets up the toper spindle nose at the axostylus axostyle tip to strut the axle, be equipped with the changeover portion that can hold the snap ring between toper spindle nose and the axostylus axostyle, the diameter of changeover portion equals the bottom surface diameter of toper spindle nose, the diameter of changeover portion is less than the diameter of axostylus axostyle, make and form the step between changeover portion and the axostylus axostyle, the bush center is opened there is the through-hole, the diameter of through-hole is steadilyd decrease to the one end of being close to the toper spindle nose from the one end of keeping away from the toper spindle nose, the minimum internal diameter that is greater than the changeover portion of through-hole, the toper spindle nose stretches into through-hole to bush and offset with the step, the length of changeover portion is less than the width of snap ring. This snap ring assembly fixture realizes the transfer and the installation of snap ring through strutting mutually supporting of axle and bush, changes into the work step split that is applicable to batch automation from the complete artifical jump ring pincers assembly that utilizes, and the mass production of being convenient for uses, effectively improves assembly efficiency.

Description

Snap ring assembly fixture

Technical Field

The utility model belongs to the technical field of the erecting tool technique and specifically relates to a snap ring assembly fixture.

Background

The honeycomb guide rod is used in a lower limb intramedullary nail operation and is mainly used in an operation approach stage, the honeycomb guide rod is inserted into the sleeve to be fixed, and the guide pin is inserted into the honeycomb long hole in the guide rod to realize drilling on a bone. The honeycomb guide rod is connected with the sleeve stably so that the honeycomb guide rod cannot easily move in the sleeve, certain damping is required to be achieved when the sleeve is inserted and pulled out, the honeycomb guide rod is smooth and free of jamming, a clamping ring is required to be arranged outside the honeycomb guide rod, a clamping groove is formed in the honeycomb guide rod, and then the clamping ring with certain elasticity is assembled to the clamping groove manually by using the clamping spring clamp.

However, in the actual assembly process, the snap spring pliers cannot effectively clamp the snap ring, so that the snap ring is easy to collapse and fly, and potential safety hazards are caused to assembly personnel and assembled parts; the expanding degree of the clamp ring cannot be effectively controlled, the clamp ring loses elasticity and even breaks when the expanding degree is too large and exceeds the elastic deformation range, and the honeycomb guide rod is scratched by a fracture of the clamp ring when the expanding degree is too small; meanwhile, the assembling tool cannot be safely withdrawn, and when the snap ring moves to a designated position, the snap ring is difficult to be withdrawn from the clamp spring pliers under the condition of ensuring safety.

SUMMERY OF THE UTILITY MODEL

In order to solve the current problem that manual assembly factor of safety is low, inefficiency, the utility model provides a snap ring assembly fixture through the cooperation of strutting axle and bush, realizes the work step split of snap ring assembly, can effectively control the degree and the mounted position of strutting of snap ring to improve assembly efficiency.

The utility model provides a technical scheme that its technical problem adopted is: a clamp ring assembly tool comprises

The opening shaft comprises a shaft rod and a conical shaft head arranged at the end part of the shaft rod, a transition section capable of accommodating a clamping ring is arranged between the conical shaft head and the shaft rod, the diameter of the transition section is equal to the diameter of the bottom surface of the conical shaft head, the diameter of the transition section is smaller than that of the shaft rod, a step is formed between the transition section and the shaft rod, and

a through hole is arranged in the center of the bushing, the diameter of the through hole is gradually reduced from one end far away from the conical shaft head to one end close to the conical shaft head,

the minimum inner diameter of the through hole is larger than the diameter of the transition section, and the conical shaft head extends into the through hole to abut against the step until the bushing is abutted against the step. Prop open the snap ring and shift to the bush through the toper spindle nose, the rethread bush shifts the snap ring to the draw-in groove department of guide bar, replaces traditional jump ring pincers, can avoid the snap ring to collapse and fly, effectively improves assembly efficiency.

Furthermore, the length of the transition section is smaller than the width of the clamping ring, and a first transition arc surface is arranged at the connecting surface of the transition section and the conical shaft head. The clamping ring sleeved on the transition section is higher than the transition section, so that the bush can be conveniently inserted between the clamping ring and the transition section.

Further, the width of the step is not less than the thickness of the snap ring. The snap ring is limited at the step and is not easy to slip.

Further, the conical shaft head is provided with a plane and a tip end, the plane of the conical shaft head is connected with the transition section, and the tip end of the conical shaft head is set to be arc-shaped. The scratch caused when the conical shaft head extends into the lining is avoided.

Furthermore, one end of the bushing, which is far away from the conical shaft head, is provided with a bearing seat, and the center of the bearing seat is correspondingly provided with a through hole. The pressing machine can conveniently press the bushing.

Furthermore, a second transition arc surface is arranged at the connecting surface of the bearing seat and the bushing. The supporting strength of the connecting surface is enhanced.

The utility model has the advantages that,

(1) The utility model provides a snap ring assembly fixture, which realizes the transfer and installation of snap rings by the mutual matching of a spreading shaft and a bush, changes the assembly from complete manual utilization of snap ring pliers into the process step splitting suitable for batch automation, is convenient for mass production and use, and effectively improves the assembly efficiency;

(2) The utility model provides a snap ring assembly fixture, which can not only stably control the opening degree of the snap ring, but also effectively control the position and the state of the snap ring by sleeving the snap ring on a bushing and an opening shaft, and can be more conveniently assembled to the position of the snap ring on a guide rod;

(3) The utility model provides a snap ring assembly fixture through the transition cambered surface on each connection face, not only can strengthen connecting the face intensity, is more convenient for lead inserting to effectively improve assembly efficiency.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of a snap ring assembly fixture;

FIG. 2 is a schematic view of a first assembly step;

FIG. 3 is a schematic view of assembly step two;

FIG. 4 is a schematic view of a third assembly step;

FIG. 5 is a schematic view of an assembly step four;

FIG. 6 is a schematic view of the honeycomb guide bar in an assembled state;

in the drawing, 1, a spreading shaft, 11, a shaft rod, 12, a conical shaft head, 13, a transition section, 14, a step, 2, a bushing, 21, a through hole, 3, a first transition arc surface, 4, a bearing seat, 5, a second transition arc surface, 6, a clamping ring, 7, a honeycomb guide rod and 8, clamping grooves are arranged.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention.

The outside cover of honeycomb guide bar 7 that uses in the wound operation is equipped with and is used for providing damped circlip 6 for it, traditional 6 mounting methods of snap ring utilize the jump ring pincers to strut snap ring 6 for the manual work and adorn in the draw-in groove 8 that honeycomb guide bar 7 outside was seted up, but manual operation jump ring pincers, make the difficult control of the degree of strutting of snap ring, the state of strutting is difficult to keep, not only easy fish tail honeycomb guide bar 7 in the suit process, still collapse easily and fly, cause the potential safety hazard to the workman, for replacing the manual work, improve assembly efficiency, design a snap ring assembly fixture, as shown in fig. 1, including strutting axle 1 and bush 2, it includes axostylus axostyle 11 and sets up the toper spindle nose 12 at axostylus axostyle 11 tip to strut axle 1, be equipped with the changeover portion 13 that can hold snap ring 6 between toper spindle nose 12 and axostylus axostyle 11, the diameter of changeover portion 13 equals the bottom surface diameter of toper spindle nose 12, the diameter of changeover portion 13 is less than the diameter of toper spindle nose 11, make form step 14 between changeover portion 13 and the axostylus axostyle 11, bush 2 center is opened there is through-hole 21, the diameter of through-hole 21 from the one end of keeping away from the one end of the tapered spindle nose 12 to the one end of keeping away from, the tapered bore of tapering spindle nose 12, the tapered bore 21, the minimum diameter of the tapered bush 21, the minimum diameter of taper bore 21 offsets into, the minimum step 21, the bore 21, the step 21, the minimum step 21 offsets into the bush 21.

Through strutting mutually supporting of axle 1 and bush 2, realize strutting of snap ring 6 and shift, can effectively control the degree of strutting of snap ring 6 to keep strutting state of snap ring 6, steadily control snap ring 6, avoid the fish tail guide bar, change into the process step split that is applicable to batch automation from complete manual assembly, the mass production of being convenient for uses. Wherein, the inner diameter of the bush 2 is slightly larger than the maximum diameter of the conical shaft head 12 of the distraction shaft 1, and the outer diameter of the bush 2 can not be too large, so as to prevent the snap ring 6 from being excessively distracted, thereby causing deformation failure.

In order to ensure that the clamping ring 6 can be stably clamped at the transition section 13, the length of the transition section 13 is set to be smaller than the width of the clamping ring 6, the width of the step 14 is not smaller than the thickness of the clamping ring 6, and when the clamping ring 6 is sleeved on the transition section 13, the clamping ring 6 is higher than the transition section 13 so as to conveniently insert the bush 2 into a gap between the clamping ring 6 and the transition section 13.

In order to avoid scratch, a transition cambered surface 3 is arranged at the connecting surface of the transition section 13 and the conical shaft head 12, so that the bushing 2 can not only be scratched in the using process, but also certain guiding can be carried out on the insertion of the bushing 2.

The cone head 12 has a plane and a tip, the plane of the cone head 12 is connected to the transition section 13, and the tip of the cone head 12 is curved to avoid scratching the bush 2 by the tip.

In order to facilitate the pressing of the press on the bush 2, one end of the bush 2, which is far away from the conical shaft head 12, is provided with a pressure bearing seat 4, the center of the pressure bearing seat 4 is correspondingly provided with a through hole 21, the diameter of the pressure bearing seat 4 is larger than the maximum diameter of the bush 2, the thickness of the pressure bearing seat is certain, and the pressing is facilitated by increasing the contact area with the press.

In order to strengthen the strength of the connecting surface, a second transition cambered surface 5 is arranged at the connecting surface of the bearing seat 4 and the bush 2, and plays a role of a reinforcing rib.

When the clamping ring 6 and the honeycomb guide rod 7 are assembled, the first step is that: sleeving the clamp ring 6 on a conical shaft head 12 of the expanding shaft 1 which is vertically placed, slowly pressing down the clamp ring 6 to a transition section 13 through a press until the clamp ring 6 abuts against a step 14, and slowly expanding the clamp ring 6 when pressing down along the conical shaft head 12 as shown in fig. 2; step two: sleeving the bush 2 on the conical shaft head 12 of the expanding shaft, slowly pressing down the bush 2 through a press, extruding the bush 2 between the expanding shaft 1 and the snap ring 6, further expanding the snap ring 6, and finally sleeving the bush 2, as shown in fig. 3; step three: the bushing 2 sleeved with the snap ring 6 is pulled out of the conical shaft head 12 and transferred to the honeycomb guide rod 7, as shown in fig. 4; step four: the bush 2 sleeved with the snap ring 6 is inserted into the clamping groove 8 from the end with the smaller diameter of the honeycomb guide rod 7, and the snap ring 6 is pushed down from the bush 2 and clamped into the clamping groove 8, so that the assembly is completed, as shown in fig. 5. In the assembling process, bush 2 must push away draw-in groove 8 department and release snap ring 6 again, otherwise snap ring 6 breaks away from bush 2 in advance and can block outside draw-in groove 8, causes honeycomb guide bar 7 by the fish tail, and honeycomb guide bar 7 after the assembly is accomplished is shown in figure 6, and snap ring 6 is stably arranged in draw-in groove 8, makes honeycomb guide bar 7 have certain damping, convenient and sleeve looks adaptation.

The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (6)

1. A clamp ring assembly fixture is characterized by comprising

Prop open axle (1), prop open axle (1) including axostylus axostyle (11) and set up toper spindle nose (12) at axostylus axostyle (11) tip, be equipped with between toper spindle nose (12) and axostylus axostyle (11) changeover portion (13) that can hold snap ring (6), the diameter of changeover portion (13) equals the bottom surface diameter of toper spindle nose (12), the diameter of changeover portion (13) is less than the diameter of axostylus axostyle (11), makes and forms step (14) between changeover portion (13) and axostylus axostyle (11), and

the center of the bushing (2) is provided with a through hole (21), the diameter of the through hole (21) is gradually reduced from one end far away from the conical shaft head (12) to one end close to the conical shaft head (12),

the minimum inner diameter of the through hole (21) is larger than the diameter of the transition section (13), and the conical shaft head (12) extends into the through hole (21) to the bushing (2) to be abutted against the step (14).

2. The snap ring assembling tool as claimed in claim 1, wherein the length of the transition section (13) is smaller than the width of the snap ring (6), and a first transition arc surface (3) is arranged at the joint surface of the transition section (13) and the conical shaft head (12).

3. A snap ring assembly tool according to claim 1, characterized in that the width of the step (14) is not less than the thickness of the snap ring (6).

4. A snap ring assembly fixture as claimed in claim 1, wherein the conical nose (12) has a plane and a tip, the plane of the conical nose (12) is connected to the transition section (13), and the tip of the conical nose (12) is curved.

5. The snap ring assembling tool according to claim 1, wherein a bearing seat (4) is arranged at one end of the bushing (2) far away from the conical shaft head (12), and a through hole (21) is correspondingly formed in the center of the bearing seat (4).

6. A snap ring assembly tool according to claim 5, characterized in that a second transition arc surface (5) is arranged at the connecting surface of the bearing seat (4) and the bushing (2).

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