CN112972034A - Snap ring in-place modifying device and modifying method - Google Patents
Snap ring in-place modifying device and modifying method Download PDFInfo
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- CN112972034A CN112972034A CN202110161099.3A CN202110161099A CN112972034A CN 112972034 A CN112972034 A CN 112972034A CN 202110161099 A CN202110161099 A CN 202110161099A CN 112972034 A CN112972034 A CN 112972034A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C13/00—Dental prostheses; Making same
- A61C13/12—Tools for fastening artificial teeth; Holders, clamps, or stands for artificial teeth
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Abstract
The invention relates to the field of dental denture production, and discloses a snap ring in-place adjusting and modifying device and an adjusting and modifying method. The snap ring positioning and modifying device comprises a snap ring contraction part for contracting the snap ring arm and a snap ring expansion part for expanding the snap ring arm; for the too loose snap ring, the snap ring is taken one's place and is transferred and change the ware and utilize the direction cambered surface of the both sides of snap ring constriction part to realize that the snap ring contracts and transfers and change, and for the too tight snap ring, this snap ring is taken one's place and is transferred and change the ware and utilize the both sides arm of force expansion of snap ring expansion part to transfer and change, compares in traditional just abnormal pincers transfer and change the mode, and the controllability is higher, and the operation degree of difficulty is lower, can realize the transfer of snap ring more steadily and change, reduces the snap ring and change the in.
Description
Technical Field
The invention relates to the field of dental denture production, in particular to a snap ring in-place adjusting and modifying device and an adjusting and modifying method.
Background
The removable partial denture is a main repairing mode of the removable denture when the dentition of the oral cavity is defective, the oral cavity is repaired clinically with frequently encountered diseases and common diseases when the dentition is defective, and if a patient with the dentition defect is not repaired in time, the chewing function and the temporomandibular joint functional movement are affected. Further, the remaining teeth may cause caries or periodontal disease of the remaining teeth due to food impaction in the edentulous space. In order to maintain the integrity of the oral maxillofacial system, keep the health of oral tissues and recover the chewing function of a patient as much as possible, the timely corresponding repair is necessary after the tooth loss. Treatment modalities for dentition defects include: the removable partial denture, the fixed denture and the removable and fixed combined prosthesis are classified into three types.
The removable partial denture is a prosthesis which is supported by natural teeth, mucous membrane and bone tissue under the denture, retained by a retainer and a base of the denture, restores the shape and the function of the lost teeth by artificial teeth, restores the shape of the defective alveolar ridge, the jaw bone and the surrounding soft tissues by the base material and can be removed and worn by a patient. The removable partial denture is a common repair method for dentition defects in China at present.
The retainer of removable denture includes two kinds of direct retainer and indirect retainer structure, and the application of snap ring is the most extensive in the direct retainer structure. In all kinds of snap rings, a three-arm snap ring is the most common type when a doctor designs, the three-arm snap ring which is designed can be well jointed with a model only by manual adjustment and grinding of a technician after being manufactured and molded, and a complete in-place effect is achieved, mainly because the removable partial denture prosthesis needs to be completed through design software during design, data of the model in the design software is generated by a model scanner, the prosthesis is finally obtained through printing after the design is completed, the design of the prosthesis is different due to different levels of the technician, errors exist between the model and the final prosthesis due to all links, the obtained prosthesis cannot be completely jointed with the model, when the result is generated, the most intuitive expression means that the snap ring part cannot be completely in place, wherein the two common states are that the snap ring is too loose or the snap ring is too tight, too loose snap ring can lead to removable partial denture retention unstable, can't satisfy the functional requirement to there is the risk of droing, the snap ring is too tight then leads to the abutment pain easily, consequently, need adjust the change to the snap ring, guarantee its maintenance elasticity's suitable.
Aiming at the problem that no special clamping ring adjusting and changing tool exists in the prior art, the traditional clamping ring adjusting and changing mode is usually manually adjusted and changed through orthodontic pliers, the manual adjusting and changing mode depends on the experience and the skill of a technician, the stability and the reliability are poor, multiple times of adjusting are prone to being out of place, and even the clamping ring arm is broken.
Disclosure of Invention
The invention aims to solve the technical problem of providing a snap ring in-place adjusting and modifying device and a snap ring in-place adjusting and modifying method, and realizing stable adjustment and modification of the tightness of a snap ring.
The invention discloses a snap ring in-place adjusting and changing device which comprises a snap ring contraction part and a snap ring expansion part, wherein the snap ring contraction part is used for contracting a snap ring arm;
the clamping ring contraction part comprises a contraction guide structure arranged on the first main body structure, the contraction guide structure is provided with a first guide arc surface and a second guide arc surface, the first guide arc surface and the second guide arc surface are respectively matched with the outer sides of the clamping ring arms on the two sides of the clamping ring, the inner sides of the first guide arc surface and the second guide arc surface are provided with accommodating spaces for accommodating the clamping ring arms, and the accommodating spaces are provided with in-place openings for pushing the tips of the clamping ring arms;
the snap ring expansion part comprises an expander arranged on a second main body structure, the second main body structure is provided with a working surface, the expander comprises a first force arm and a second force arm, the first force arm and the second force arm are hinged, the articulated shaft is perpendicularly connected to the second main body structure, the first force arm and the second force arm are located on the working surface, the rotating direction of the first force arm and the rotating direction of the second force arm are parallel to the working surface, the first force arm extends out of a first holding end through the articulated shaft, the second force arm extends out of a second holding end through the articulated shaft, and the outer sides of the first force arm and the second force arm are matched with the inner sides of the snap ring arms on the two sides of the snap ring.
Preferably, the first and second body structures are a unitary structure.
Preferably, the snap ring contraction part and the snap ring expansion part are respectively positioned on the front surface and the back surface of the integrated structure.
Preferably, shrink guide structure include with the both sides snap ring arm looks adaptation of snap ring two transfer the groove, two transfer two sides that the groove is relative do respectively first direction cambered surface and second direction cambered surface, transfer the inslot space of groove do accommodation space, the tip of transferring the groove has the opening of taking one's place that is used for pushing into the sharp-pointed end of snap ring arm, transfer the interval looks adaptation between the both sides snap ring arm of taking one's place opening interval and snap ring of groove.
Preferably, the snap ring contraction part comprises at least two groups of contraction guide structures, two adjustment and modification grooves of each contraction guide structure are respectively matched with snap rings with different specifications, and the adjustment and modification grooves of each contraction guide structure are sequentially arranged from inside to outside according to the sequence that the in-position opening intervals of the adjustment and modification grooves are from small to large.
Preferably, the snap ring contraction part comprises three groups of contraction guide structures, and the intervals of the positioning openings of the adjustment and modification grooves in the three groups of contraction guide structures are respectively 2-6mm, 8-12mm and 14-18 mm.
Preferably, a scale for indicating the distance between the first guide arc surface and the second guide arc surface at the corresponding position is arranged in the adjusting groove.
Preferably, snap ring expansion portion still includes snap ring expansion groove, first arm of force and second arm of force are located snap ring expansion inslot, two medial surfaces in snap ring expansion groove and the lateral surface looks adaptation of the both sides snap ring arm of snap ring, snap ring expansion groove is provided with the opening of stepping down that is used for holding the little connector of snap ring for the expander offside.
Preferably, a cushion layer is arranged on the outer side of each of the first force arm and the second force arm.
Preferably, the working surface or the side of the first body structure adjacent to the working surface has a scale for measuring the distance of the snap ring tip.
The invention discloses a snap ring in-place modifying method, which adopts the snap ring in-place modifying device;
when the snap ring is too loose, the contraction part of the snap ring is used for adjustment and change, the tip end of the snap ring is pushed into the accommodating space of the contraction guide structure from the in-place opening, the outer sides of the snap ring arms on the two sides of the snap ring are respectively contacted with the first guide arc surface and the second guide arc surface, the snap ring is continuously pushed, the snap ring arms on the two sides of the snap ring are contracted under the action of the first guide arc surface and the second guide arc surface, and after the preset adjustment and change amount is reached, the push of the snap ring is stopped and the push amount is kept until the snap ring is permanently deformed;
when the snap ring is too tight, the expansion part of the snap ring is used for adjustment and change, the snap ring is placed on the working face, the first force arm and the second force arm of the expander are located between the snap ring arms on the two sides of the snap ring, the first holding end and the second holding end are outwards expanded, the first force arm and the second force arm are outwards expanded to be in contact with the inner sides of the snap ring arms on the two sides of the snap ring, the first holding end and the second holding end are continuously expanded, the snap ring arms on the two sides of the snap ring are expanded under the action of the first force arm and the second force arm, and after the preset adjustment and change is reached, the expansion is stopped and the expansion amount is kept until the snap ring is permanently deformed.
Preferably, before the snap ring is modified, the bracket comprising the snap ring is put in place on the model to judge the tightness state of the snap ring, and then the contraction part or the expansion part of the snap ring is selected according to the tightness state of the snap ring to modify.
Preferably, when the snap ring is too loose, the maximum numerical value of a gap existing between the tip of the snap ring and the model after the snap ring is in place to the model is measured and recorded, the bracket is removed from the model and then is modified through the contraction part of the snap ring, and when the contraction quantity of the tip of the snap ring is equal to the maximum numerical value of the gap existing between the tip of the snap ring and the model, the push of the snap ring is stopped and kept until the snap ring is permanently deformed;
when the snap ring is too tight, the snap ring cannot be completely worn when the bracket with the snap ring is in place on the model, the distance between the expected placing positions of the tips of the snap ring on the model is measured and recorded, the distance is changed through the expansion part of the snap ring, and when the distance between the tips of the snap ring after expansion is equal to the distance between the expected placing positions of the tips of the snap ring, the expansion is stopped and the expansion amount is kept until the snap ring is permanently deformed.
Preferably, when the snap ring is too tight, printing and dyeing the lip and tongue sides of the abutments, corresponding to the snap ring, on the model by using an ink material, positioning the snap ring on the corresponding abutments, then taking down the snap ring, wherein the ink material is left on the inner side of the snap ring arm of the snap ring due to too tight fit with the abutments, and marking an too tight area of the snap ring arm, which is in contact with the abutment model;
when the snap ring is modified by the snap ring expansion part, the first force arm and the second force arm are preferentially contacted with the marked over-tight area, and then the expansion of the snap ring is continued.
The invention has the beneficial effects that: for the too loose snap ring, the snap ring is taken one's place and is transferred and change the ware and utilize the direction cambered surface of the both sides of snap ring constriction part to realize that the snap ring contracts and transfers and change, and for the too tight snap ring, this snap ring is taken one's place and is transferred and change the ware and utilize the both sides arm of force expansion of snap ring expansion part to transfer and change, compares in traditional just abnormal pincers transfer and change the mode, and the controllability is higher, and the operation degree of difficulty is lower, can realize the transfer of snap ring more steadily and change, reduces the snap ring and change the in.
Drawings
FIG. 1 is a perspective view of a snap ring in position modifier;
FIG. 2 is a schematic view of a snap ring constriction;
FIG. 3 is a schematic view of a snap ring expansion;
FIG. 4 is an operational schematic of the retraction of the snap ring;
FIG. 5 is an operational schematic of the expansion of the snap ring.
The lower arrow in fig. 4 and 5 indicates the direction of the force application, and the upper arrow indicates the deformed square shape of the snap ring arm.
Reference numerals: the clamping ring comprises a clamping ring contraction part 10, an adjusting and modifying groove 1, a first guide arc surface 11, a second guide arc surface 12, a positioning opening 13, a clamping ring expansion part 20, an expander 2, a first force arm 21, a second force arm 22, a first holding end 23, a second holding end 24, a hinge shaft 25, a working surface 26, a position-avoiding opening 27 and a clamping ring arm 31.
Detailed Description
The present invention is further described below.
As shown in FIG. 1, the snap ring positioning modifier disclosed by the invention comprises a snap ring contraction part 10 for contracting a snap ring arm 31 and a snap ring expansion part 20 for expanding the snap ring arm 31;
as shown in fig. 2, the snap ring constriction portion 10 includes a constriction guide structure disposed on the first main body structure, the constriction guide structure has a first guide arc surface 11 and a second guide arc surface 12, the first guide arc surface 11 and the second guide arc surface 12 are respectively adapted to the outer sides of the snap ring arms 31 on both sides of the snap ring, the inner sides of the first guide arc surface 11 and the second guide arc surface 12 have an accommodation space for accommodating the snap ring arms 31, and the accommodation space has a positioning opening 13 for pushing the tips of the snap ring arms 31;
as shown in fig. 3, the clasp expansion part 20 includes an expander 2 disposed on a second main structure, the second main structure has a working surface 26, the expander 2 includes a first force arm 21 and a second force arm 22, the first force arm 21 and the second force arm 22 are hinged to each other, the hinge shaft 25 is vertically connected to the second main structure, the first force arm 21 and the second force arm 22 are located on the working surface 26 and the rotation direction is parallel to the working surface 26, the first force arm 21 extends out of the first holding end 23 through the hinge shaft 25, the second force arm 22 extends out of the second holding end 24 through the hinge shaft 25, and the outer sides of the first force arm 21 and the second force arm 22 are adapted to the inner sides of the clasp arms 31 on both sides of the clasp.
The method for modifying the snap ring by using the snap ring in-place modifying device comprises the following steps:
as shown in fig. 4, when the snap ring is too loose, the snap ring is adjusted and changed by using the snap ring contraction part 10, the tip end of the snap ring is pushed into the accommodating space of the contraction guide structure from the in-position opening 13, so that the outer sides of the snap ring arms 31 at the two sides of the snap ring are respectively contacted with the first guide arc surface 11 and the second guide arc surface 12, the snap ring is continuously pushed, the snap ring arms 31 at the two sides of the snap ring are contracted under the action of the first guide arc surface 11 and the second guide arc surface 12, and after the preset adjustment and change amount is reached, the push of the snap ring is stopped and the push amount is maintained until the snap ring is; by utilizing the interaction between the guide arc surface and the outer side of the snap ring arm 31, the contraction of the snap ring arm 31 has higher controllability, and the problem of contraction of the snap ring arm 31 can be avoided to a great extent.
As shown in fig. 5, when the snap ring is too tight, the snap ring is modified by the snap ring expansion portion 20, the snap ring is placed on the working surface 26, the first force arm 21 and the second force arm 22 of the expander 2 are both located between the snap ring arms 31 at both sides of the snap ring, the first holding end 23 and the second holding end 24 are expanded outwards, the first force arm 21 and the second force arm 22 are expanded outwards to contact with the inner sides of the snap ring arms 31 at both sides of the snap ring, the first holding end 23 and the second holding end 24 are expanded continuously, the snap ring arms 31 at both sides of the snap ring are expanded under the action of the first force arm 21 and the second force arm 22, and after reaching the preset modification amount, the expansion is stopped and the expansion amount is maintained until the snap ring is permanently deformed. The expander 2 has a similar structure to an orthodontic pliers, but has an action part and a use method which are different from those of the orthodontic pliers, wherein the action part is positioned at the outer sides of the first force arm 21 and the second force arm 22, and the expansion of the snap ring is realized through the expansion of the first force arm 21 and the second force arm 22. The stability of the expansion can be greatly improved by the cooperation of the working surface 26 with the expander 2.
In order to determine the tightness state of the snap ring, so as to determine whether to modify the snap ring, before modifying the snap ring, the bracket including the snap ring is first placed on the model to determine the tightness state of the snap ring, and then the snap ring contraction portion 10 or the snap ring expansion portion 20 is selected according to the tightness state of the snap ring to modify the snap ring. Under special conditions, the tightness of the snap ring can be determined by directly trying on the snap ring by a patient or by measuring the size of the snap ring and comparing the size with design data.
The operator with abundant experience can directly determine the adjustment and modification amount of the snap ring according to experience, but the adjustment and modification amount of the snap ring is quantized undoubtedly in a better mode. The bracket can be designed manually firstly when being manufactured, so that the size of the distance between the tips of the snap ring can be determined in the design software when the snap ring is designed, and the quantification of the snap ring adjustment and modification can be realized by adjusting and modifying the distance between the tips of the bracket snap ring after the adjustment and modification. In addition, because the snap ring is usually tried on the model, the adjustment and modification amount of the snap ring can be quantified through the measurement of the snap ring and the model, and the specific way is as follows:
when the snap ring is too loose, measuring and recording the maximum numerical value of a gap between the tip of the snap ring and the model after the snap ring is in place to the model, taking the bracket off the model and modifying the bracket through the snap ring contraction part 10, and stopping propelling the snap ring and keeping the propelling quantity until the snap ring is permanently deformed when the contraction quantity of the tip of the snap ring is equal to the maximum numerical value of the gap between the tip of the snap ring and the model; specifically, when the snap ring contracts, the contraction quantity of the snap ring can be directly observed, or the distance between the tips of the snap ring before the snap ring contracts can be measured firstly, then the maximum value of the gap is subtracted, the distance between the tips of the snap ring which needs to be reached after the snap ring contracts is calculated, and when the distance between the tips of the snap ring is contracted to the value through the snap ring in-place adjusting and changing device, the contraction quantity of the tips of the snap ring is indicated to meet the requirement.
When the snap ring is too tight, the bracket with the snap ring cannot be completely worn in place on the model, the model is easily damaged by force, the distance between the expected placing positions of the tips of the snap ring on the model can be measured and recorded, the distance is adjusted and changed through the snap ring expansion part 20, and when the distance between the tips of the snap ring after expansion is equal to the distance between the expected placing positions of the tips of the snap ring, the expansion is stopped and the expansion amount is kept until the snap ring is permanently deformed. The gap measurement after the snap ring is in place and the measurement of the distance between the expected placing positions of the tip end of the snap ring can utilize high-precision measuring tools such as a vernier caliper, a micrometer and the like; the modified snap ring can also be measured by using the measuring tool, and in addition, scales can be directly arranged on the snap ring in-place modifying device to realize measurement, which will be specifically described in detail later.
Usually, the outer side of the snap ring can be well matched with the first guide arc surface 11 and the second guide arc surface 12 of the adjustment groove 1, but for the expansion angle of the expander 2, the first force arm 21 and the second force arm 22 will contact with the snap ring arm 31 in part of the area first when expanding the snap ring, and the area contacted in advance can be adjusted by adjusting the placement position of the snap ring. On the basis, in order to further improve the adaptation degree of the expanded snap ring and the abutment, when the snap ring is too tight, the lip and tongue sides of the abutment corresponding to the snap ring on the model are printed and dyed by using an ink material, the snap ring is put in place on the corresponding abutment, then the snap ring is taken down, the ink material is remained on the inner side of the snap ring arm 31 of the snap ring due to too tight fit with the abutment, and an too tight area of the snap ring arm 31 in contact with the abutment model is marked; when the snap ring is modified by the snap ring expansion part 20, the first force arm 21 and the second force arm 22 are made to preferentially contact the marked over-tight area, and then the expansion of the snap ring is continued, so that the over-tight area of the snap ring can be firstly expanded, and the expanded shape is more suitable.
The snap ring contraction part 10 and the snap ring expansion part 20 of the snap ring positioning modifier can be located on different main structures, that is, the first main structure and the second main structure are respectively a single main structure, but in a preferred embodiment of the present invention, the first main structure and the second main structure are integrated, that is, the snap ring contraction part 10 and the snap ring expansion part 20 are located on the same main structure, for example, a plate with a large surface can be used as an integrated structure, the snap ring contraction part 10 and the snap ring expansion part 20 are separately located on the upper surface of the plate, or as shown in fig. 1, the snap ring contraction part 10 and the snap ring expansion part 20 are respectively located on the front surface and the back surface of the integrated structure. Compared with the former, the volume of the whole snap ring in-place adjusting and changing device can be greatly reduced, and the storage and the use are facilitated.
The main action parts of the contraction guide structure are a first guide arc surface 11 and a second guide arc surface 12, and the specific structure of the contraction guide structure can adopt a hole-shaped structure, namely the first guide arc surface 11 and the second guide arc surface 12 are the side surfaces of two holes respectively, and the space in the holes is the accommodating space of the snap ring arm 31, but the mode is not beneficial to observing the insertion depth of the snap ring arm 31; the structure of the large groove body can also be adopted, namely the first guide arc surface 11 and the second guide arc surface 12 are respectively the left side surface and the right side surface of the groove body structure, and the space in the groove is the accommodating space of the snap ring arm 31. In the embodiment shown in fig. 2, the contraction guide structure includes two adjusting grooves 1 adapted to the snap ring arms 31 on two sides of the snap ring, two opposite side surfaces of the two adjusting grooves are the first guide arc surface 11 and the second guide arc surface 12, respectively, the space in the groove of the adjusting groove 1 is the accommodating space, the end of the adjusting groove 1 is provided with a positioning opening 13 for pushing the tip of the snap ring arm 31, and the distance between the positioning openings 13 of the adjusting grooves 1 is adapted to the distance between the snap ring arms 31 on two sides of the snap ring. This mode is favorable to observing the depth of insertion and the complete state of snap ring arm 31 for aforementioned poroid structure, can restrict snap ring arm 31 better for big cell body structure, improves stability. Aiming at the size of the snap ring, the requirement can be met by generally adjusting the depth of the groove 1 to be about 3 mm.
The snap ring can have the big or small specification of multiple difference, to the snap ring of equidimension not, need adopt the accent of the specification that corresponds to change groove 1, consequently, can set up the multiunit and change groove 1 and change the snap ring of the different size of adaptation, nevertheless each group transfers and changes the direct style of calligraphy in groove 1 and arrange and can increase the volume of whole accent ware undoubtedly, therefore as preferred mode, snap ring constriction portion 10 contains at least two sets of shrink guide structure, and two of each shrink guide structure are transferred and are changed groove 1 and respectively with the snap ring looks adaptation of different specifications, and the accent of each shrink guide structure changes groove 1 and arranges from inside to outside according to the order of transferring the 13 intervals of taking one's place opening that changes groove 1 from little to. The arrangement mode is arranged according to the characteristics of the adjusting and modifying grooves 1, and the whole occupied area of the arrangement mode is completely equal to that of the largest group of adjusting and modifying grooves 1, so that the compactness of the adjusting and modifying device can be improved, and the whole volume can be reduced.
In the embodiment shown in fig. 2, the snap ring constriction 10 comprises three sets of constriction guiding structures, and the spacing between the positioning openings 13 of the adjustment grooves 1 in the three sets of constriction guiding structures is 2-6mm, 8-12mm and 14-18mm respectively. It should be understood that the above-mentioned spacing of the seating openings 13 refers to the range of the minimum distance and the maximum distance between the seating openings 13 of the adjustment grooves 1 in the same set of contraction guide structures, wherein the maximum distance is equal to the minimum distance plus the cross-sectional width of the two seating openings 13 of the adjustment grooves 1, and the spacing of the seating openings 13 may represent the range of the minimum spacing to the maximum spacing of the tips of the snap ring that can be pushed in. The tongue diameter of a molar cheek of a normal person is defined according to the anatomical physiology of the oral cavity, the tongue diameter of the anatomical molar cheek is 10mm, the range of the surrounding tooth structure when the snap ring is designed is 1/2-3/4, and the sizes of the three positioning openings 13 can cover more than 80% of the distance between the snap ring arms 31.
As mentioned above, the scales can be directly arranged on the snap ring in-place adjuster to realize the measurement of the expansion or contraction of the snap ring, and for the snap ring in-place adjuster adopting the structure of the adjusting groove 1, the scales (not shown) for indicating the distance between the first guiding arc surface 11 and the second guiding arc surface 12 at the corresponding positions can be arranged in the adjusting groove 1. When the snap ring contracts, the distance between the tips of the snap ring at the moment can be known by observing the corresponding scales of the tips of the snap ring in the adjusting groove 1, so that whether the contraction quantity meets the requirement or not is determined.
Under the condition that does not have enough experience, when using first arm of force 21 and second arm of force 22 expansion snap ring, it is too big to appear the expansion volume possibly, in order to prevent this problem as far as possible, snap ring expansion portion 20 still includes snap ring expansion groove, first arm of force 21 and second arm of force 22 are located snap ring expansion inslot, two medial surfaces in snap ring expansion groove and the both sides snap ring arm 31's of snap ring lateral surface looks adaptation, snap ring expansion groove is provided with the opening of stepping down 27 that is used for holding the little connector of snap ring for expander 2 offside. When the snap ring expands, the snap ring is placed in the snap ring expansion groove as shown in fig. 5, the small connector is located in the abdicating opening 27, two inner side surfaces of the snap ring expansion groove can limit the maximum amount of expansion of the snap ring, and the snap ring is prevented from being damaged due to overlarge expansion of the snap ring when the operation is not proper.
Similarly, corresponding scales can be provided on the expanded portion 20 of the snap ring to measure the expansion amount of the snap ring, and in the preferred embodiment of the present application, the working surface 26 or the side of the first main structure close to the working surface 26 is provided with scales for measuring the distance between the tips of the snap ring, so that the measurement of the distance between the tips of the snap ring can be realized (not shown). In addition, angle scales may be provided at the snap ring expanding portion 20 and the snap ring contracting portion 10, respectively, for reference.
Because the inboard of snap ring arm 31 is its tissue face, more need prevent its surface damage when the expansion snap ring, can cushion buffers such as paper between arm of force and snap ring tissue face for this reason when the expansion snap ring, except through adding the cushion temporarily, can also all be provided with the bed course in the first arm of force 21 and the second arm of force 22 outside for the buffering, the bed course adopts the texture to compare in the softer material of snap ring, like plastics, rubber etc..
When the snap ring is in place, the device can be manufactured by firstly creating a cuboid with the length of 20mm, the width of 14mm and the height of 13mm according to the required size in the design of Solidworks design software, wherein the upper surface and the lower surface of the cuboid are used as the positive functional surface and the negative functional surface of the snap ring adjusting device and are used for designing the snap ring contraction part 10 and the snap ring expansion part 20. Three groups of adjusting and modifying grooves 1 with different intervals of in-place openings 13 are designed on the front surface, the three groups of adjusting and modifying grooves are respectively 2-6mm, 8-12mm and 14-18mm, the radian of each adjusting and modifying groove 1 is set according to the outer sides of the clamp ring arms 31 on the two sides, the adjusting and modifying groove gradually shrinks inwards from the ends of the in-place openings 13, the adjusting and modifying device with a force arm structure is arranged on the back surface, the shape of the force arm is similar to that of the clamp ring arms 31, the thickness of the force arm is 2mm, the width of the force arm is 3mm, the force arm is directly connected with the outer side holding end after passing through a rotation center, the holding end is similar to that of the holding end of a scissor tool, the middle part of.
The clamp ring in-place modifying device designed by the three-dimensional design software finishes typesetting and slicing work in data processing software Magics, then three-dimensional data is led into metal printing equipment for printing and forming, the printed main body is subjected to heat treatment, linear cutting, support removal, grinding and polishing to obtain a main body part and a force arm structure part of the clamp ring in-place modifying device, and the force arm and the modifying device main body can be stably combined through the remaining rivet holes, so that a final modifying device finished product can be obtained. When the highly polished adjusting groove and the surface of the force arm are in direct contact with the snap ring structure to be adjusted and moved relatively, no damage scratch is generated on the surface or the inner wall of the snap ring, and a certain protection effect is achieved on parts.
Claims (14)
1. The snap ring positioning adjustment and modification device is characterized by comprising a snap ring contraction part (10) used for contracting the snap ring arm (31) and a snap ring expansion part (20) used for expanding the snap ring arm (31);
the snap ring contraction part (10) comprises a contraction guide structure arranged on a first main body structure, the contraction guide structure is provided with a first guide arc surface (11) and a second guide arc surface (12), the first guide arc surface (11) and the second guide arc surface (12) are respectively matched with the outer sides of snap ring arms (31) on two sides of the snap ring, the inner sides of the first guide arc surface (11) and the second guide arc surface (12) are provided with accommodating spaces for accommodating the snap ring arms (31), and the accommodating spaces are provided with positioning openings (13) for pushing the tips of the snap ring arms (31);
clasp expansion portion (20) is including setting up expander (2) on the second major structure, the second major structure has working face (26), expander (2) are including first arm of force (21) and second arm of force (22), first arm of force (21) and second arm of force (22) are articulated mutually, articulated shaft (25) are connected on the second major structure perpendicularly, first arm of force (21) and second arm of force (22) are located working face (26) and the direction of rotation parallels with working face (26), articulated shaft (25) are crossed in first arm of force (21) and are extended first end (23) of gripping, articulated shaft (25) are crossed in second arm of force (22) and are extended second end (24) of gripping, the inboard looks adaptation of both sides clasp arm (31) of the outside and clasp of first arm of force (21) and second arm of force (22).
2. A snap ring position modifier as defined in claim 1, wherein: the first main body structure and the second main body structure are of an integrated structure.
3. A snap ring position modifier as defined in claim 2, wherein: the snap ring contraction part (10) and the snap ring expansion part (20) are respectively positioned on the front surface and the back surface of the integrated structure.
4. A snap ring position modifier as defined in claim 1, wherein: shrink guide structure include with two of the both sides snap ring arm (31) looks adaptation of snap ring transfer groove (1), two transfer two sides that change groove (1) is relative do respectively first direction cambered surface (11) and second direction cambered surface (12), transfer the inslot space that changes groove (1) to do accommodation space, the tip of transferring groove (1) has opening (13) of taking one's place that is used for pushing snap ring arm (31) most advanced, transfer the interval looks adaptation between opening (13) interval of taking one's place and the both sides snap ring arm (31) of snap ring of changing groove (1).
5. The snap ring position modifier of claim 4, wherein: the snap ring contraction part (10) comprises at least two groups of contraction guide structures, two adjustment and modification grooves (1) of each contraction guide structure are respectively matched with snap rings of different specifications, and the adjustment and modification grooves (1) of each contraction guide structure are sequentially arranged from inside to outside according to the sequence of the intervals of the positioning openings (13) of the adjustment and modification grooves (1).
6. A snap ring position modifier as defined in claim 4 or 5, wherein: the snap ring contraction part (10) comprises three groups of contraction guide structures, and the distances of the in-position openings (13) of the adjustment and modification grooves (1) in the three groups of contraction guide structures are respectively 2-6mm, 8-12mm and 14-18 mm.
7. A snap ring position modifier as defined in claim 4 or 5, wherein: and scales for indicating the distance between the first guide arc surface (11) and the second guide arc surface (12) at corresponding positions are arranged in the adjusting groove (1).
8. A snap ring position modifier as defined in claim 1, wherein: snap ring expansion portion (20) still include snap ring expansion groove, first arm of force (21) and second arm of force (22) are located snap ring expansion inslot, the lateral surface looks adaptation of two medial surfaces in snap ring expansion groove and both sides snap ring arm (31) of snap ring, snap ring expansion groove is provided with opening (27) of stepping down that is used for holding the little connector of snap ring for expander (2) offside.
9. A snap ring position modifier as defined in claim 1 or 8, wherein: and cushion layers are arranged on the outer sides of the first force arm (21) and the second force arm (22).
10. A snap ring position modifier as defined in claim 1 or 8, wherein: the working surface (26) or the side of the first main structure close to the working surface (26) is provided with a scale for measuring the distance of the tip of the snap ring.
11. A snap ring position adjusting method, characterized in that a snap ring position adjusting device according to any one of claims 1 to 10 is adopted;
when the snap ring is too loose, the snap ring shrinkage part (10) is used for adjustment and change, the tip end of the snap ring is pushed into the accommodating space of the shrinkage guide structure from the in-position opening (13), the outer sides of the snap ring arms (31) on the two sides of the snap ring are respectively contacted with the first guide arc surface (11) and the second guide arc surface (12), the snap ring is continuously pushed, the snap ring arms (31) on the two sides of the snap ring are shrunk under the action of the first guide arc surface (11) and the second guide arc surface (12), and after the preset adjustment and change amount is reached, the push of the snap ring is stopped and the push amount is kept until the snap ring is permanently deformed;
when the clamping ring is too tight, the clamping ring is adjusted and changed by using the clamping ring expansion part (20), the clamping ring is placed on the working surface (26), the first force arm (21) and the second force arm (22) of the expander (2) are located between the clamping ring arms (31) on the two sides of the clamping ring, the first holding end (23) and the second holding end (24) are expanded outwards, the first force arm (21) and the second force arm (22) are expanded outwards to be in contact with the inner sides of the clamping ring arms (31) on the two sides of the clamping ring, the first holding end (23) and the second holding end (24) are expanded continuously, the clamping ring arms (31) on the two sides of the clamping ring are expanded under the action of the first force arm (21) and the second force arm (22), and after the preset adjustment and change amount is reached, the expansion amount is stopped and is kept until the clamping ring is permanently deformed.
12. The snap ring seating adjustment method of claim 11, wherein: before the snap ring is changed, the bracket containing the snap ring is put in place on the model to judge the tightness state of the snap ring, and then the contraction part (10) or the expansion part (20) of the snap ring is selected according to the tightness state of the snap ring to change.
13. A snap ring seating modification method as defined in claim 12, wherein: when the snap ring is too loose, measuring and recording the maximum numerical value of a gap between the tip of the snap ring and the model after the snap ring is in place to the model, taking the bracket off the model, modifying the bracket through a snap ring contraction part (10), and stopping propelling the snap ring and keeping the propelling quantity until the snap ring is permanently deformed when the contraction quantity of the tip of the snap ring is equal to the maximum numerical value of the gap between the tip of the snap ring and the model;
when the clamping ring is too tight, the bracket with the clamping ring cannot be completely worn when in place on the model, the distance between the expected placing positions of the tips of the clamping ring on the model is measured and recorded, the distance is adjusted and changed through the clamping ring expansion part (20), and when the distance between the tips of the clamping ring after expansion is equal to the distance between the expected placing positions of the tips of the clamping ring, the expansion is stopped and the expansion amount is kept until the clamping ring is permanently deformed.
14. A snap ring seating adjustment method as defined in claim 13, wherein: when the clamping ring is too tight, printing and dyeing the lip and tongue sides of the abutments, corresponding to the clamping ring, on the model by using an ink material, positioning the clamping ring on the corresponding abutments, then taking down the clamping ring, enabling the inner side of a clamping ring arm (31) of the clamping ring to be too tight in fit with the abutments to leave the ink material, and marking an over-tight area where the clamping ring arm (31) is contacted with the abutment model;
when the snap ring is modified by the snap ring expansion part (20), the first force arm (21) and the second force arm (22) are preferentially contacted with the marked over-tightening area, and then the expansion of the snap ring is continued.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110161099.3A CN112972034B (en) | 2021-02-05 | 2021-02-05 | Snap ring in-place modifying device and modifying method |
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| CN202110161099.3A CN112972034B (en) | 2021-02-05 | 2021-02-05 | Snap ring in-place modifying device and modifying method |
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| CN112972034B CN112972034B (en) | 2022-05-31 |
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| GB188630A (en) * | 1921-11-08 | 1923-04-12 | Jelenko & Co Inc J F | Improvements relating to dental clasps |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN112972034B (en) | 2022-05-31 |
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