CN218016862U - Hot-setting tooth taking clamp - Google Patents
Hot-setting tooth taking clamp Download PDFInfo
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- CN218016862U CN218016862U CN202222311719.XU CN202222311719U CN218016862U CN 218016862 U CN218016862 U CN 218016862U CN 202222311719 U CN202222311719 U CN 202222311719U CN 218016862 U CN218016862 U CN 218016862U
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Abstract
The utility model relates to a technical field is inlayed to the column tooth, especially relates to a tooth anchor clamps are got to heat inlaying. The hot-embedded tooth taking clamp comprises a sleeve, the sleeve is provided with a sleeve inner cavity, a plunger shaft is movably mounted in the sleeve inner cavity, one end of the plunger shaft is located in the sleeve inner cavity, the other end of the plunger shaft extends out of the sleeve, an anti-disengaging structure used for preventing the plunger shaft from being disengaged from the sleeve outwards is arranged on the sleeve, one end of the plunger shaft located in the sleeve is provided with a magnet, and the magnet can adsorb one or more than two column teeth in the sleeve inner cavity at one time. The hot-setting tooth-taking clamp only needs to install the magnet at one end of the plunger shaft, which is used for extending into the sleeve, so that the magnet has magnetism with proper size, the columnar teeth can be adsorbed and kept in the inner cavity of the sleeve, the adsorption is reliable and stable, the columnar teeth can be effectively prevented from falling off, and the production and the manufacture are very convenient; because the magnet is positioned in the sleeve, the magnet is not abraded and scratched with any other object in the using process, so that the magnet is not easily damaged, and the hot-setting tooth-taking clamp has a longer service life.
Description
Technical Field
The utility model relates to a technical field is inlayed to the column tooth, especially relates to a tooth anchor clamps are got to heat inlaying.
Background
When the cold setting process is adopted to fix the teeth, the columnar teeth are firstly knocked and positioned on the tooth holes and then pressed into the hole bottoms by a press machine, the hole walls can be cut and damaged in the pressing process of the columnar teeth, and the columnar teeth can also be damaged. Compare in cold process of inlaying, heat the matrix when hot inlay and can make the perforation inflation grow, stress when reducing the column tooth and getting into the perforation reduces the damage to the elastic zone of interference fit, and the perforation shrink after the cooling, elastic zone hold the column tooth tightly to it is more firm to make the column tooth inlay, and the damage also is difficult for taking place for column tooth itself. The heating temperature of the matrix is higher when hot setting, usually above 100 ℃, the risk of scalding hands exists when workers manually install the matrix, the labor intensity is high, and the setting efficiency is low.
Chinese utility model patent with publication number CN202825700U discloses and a solid tooth rifle is inlayed to carbide post tooth heat, this solid tooth rifle is inlayed to heat includes the sleeve pipe, movable mounting has the plunger axle in the sleeve pipe inner chamber, wear to be equipped with return spring on the plunger axle, the position that is close to axial one end on the sleeve pipe is equipped with the round aperture, alloy fastening ball has been placed in the aperture, the alloy fastening ball outside is equipped with the clamping ring in order to keep alloy fastening ball in the aperture, carbide post tooth is put into the sleeve pipe after alloy fastening ball slightly presss from both sides carbide post tooth under the effect of clamping ring, squeeze the plunger axle with the hand, carbide post tooth is impressed in the heated tooth hole along the sleeve pipe axial, after loosening the plunger axle, the plunger axle resets under return spring's promotion, can carry out second grain post tooth clamping.
The existing hot-setting tooth fixing gun can avoid scalding workers and reduce the labor intensity of the workers when being used for hot setting, but still has the following problems when in use: (1) A circle of small holes for installing the alloy fastening balls are required to be formed in the sleeve, the small holes are required to be closed holes so as to ensure that the alloy fastening balls can move in the small holes in a small range but cannot be radially inwards separated, the fastening rings are installed on the outer ring after the alloy fastening balls are inserted into all the small holes, all the small balls cannot fall from the small holes in the process, the installation process is time-consuming and labor-consuming, and the manufacturing of the hot-setting tooth gun is very troublesome; (2) The fastening ring needs to be an elastic ring, so that the use requirement can be met, the elastic ring is easy to age under the influence of high temperature, the temperature of a tire body is usually over 100 ℃ during hot inlaying, the elastic ring is inevitably aged in such a high-temperature environment, the fastening capacity of the alloy fastening ball is weakened after ageing, the alloy fastening ball cannot clamp and keep the hard alloy column teeth in the sleeve, and a hot-inlaying tooth fastening gun cannot be normally used; (3) The fastening ring radially outwards protrudes out of the outer peripheral surface of the sleeve, and is easily rubbed and damaged or even scraped in the use process, especially, the fastening ring is easily damaged when made of elastic materials, so that the service life of the fastening ring is very short, and the fastening ring needs to be frequently replaced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a get tooth anchor clamps are inlayed to heat to solve the current solid tooth rifle of inlaying and make trouble and the short problem of life.
In order to achieve the above purpose, the utility model discloses tooth anchor clamps are got to hot inlaying adopts following technical scheme:
the utility model provides a tooth anchor clamps are got to heat inlay, includes the sleeve pipe, and the sleeve pipe has the sleeve pipe inner chamber, has the plunger axle along sleeve pipe axial movable mounting in the sleeve pipe inner chamber, and the one end of plunger axle is arranged in the sleeve pipe inner chamber, and the other end stretches out outside the sleeve pipe, is equipped with on the sleeve pipe to be used for preventing that the plunger axial from deviating from sheathed tube anti-disengaging structure outward, and the one end that is located the sleeve pipe of plunger axle is equipped with magnet, and the one-off adsorbable one or more than two column teeth of magnet are in the sleeve pipe inner chamber.
Has the advantages that: set up magnet through the one end that is located the cover pipe at the plunger axle, produce the adsorption affinity to the column tooth, in order to adsorb the column tooth temporarily and keep in the sleeve pipe inner chamber, the workman only needs to exert thrust to the one end outside the extension cover pipe of plunger axle during the inlay tooth, alright outwards release and tentatively impress the tooth hole along the sleeve pipe axial with the column tooth, the chamfer structure of column tooth afterbody can produce the frictional force of equidimension with the tooth hole this moment, this frictional force is greater than the adsorption affinity of magnet to the column tooth, thereby make the column tooth can keep in the tooth hole and not taken out the tooth hole by the sleeve pipe once more, it can accomplish the solid tooth of hot inlaying with the whole tooth holes of impressing of column tooth after the sleeve pipe to remove. The hot-setting tooth-taking clamp only needs to install the magnet at one end of the plunger shaft, which is used for extending into the sleeve, so that the magnet has magnetism with proper size, the columnar teeth can be adsorbed and kept in the inner cavity of the sleeve, the adsorption is reliable and stable, the columnar teeth can be effectively prevented from falling off, and the production and the manufacture are very convenient; because the magnet is positioned in the sleeve, the magnet is not abraded and scratched with any other object in the using process, so that the magnet is not easily damaged, and the hot setting and taking tooth clamp has longer service life.
Furthermore, one end of the plunger shaft, which is positioned in the sleeve, is provided with a mounting groove, and the magnet is mounted in the mounting groove.
Has the advantages that: the magnet is more convenient to install.
Furthermore, the degree of depth of mounting groove is greater than the thickness of magnet, and the whole embedding of magnet is in the mounting groove and fixed mounting is in the tank bottom department of mounting groove.
Has the beneficial effects that: make the partial cell wall of mounting groove and magnet contact, other partial cell walls also can produce certain adsorption to the post tooth after being magnetized by magnet, adsorb more reliably.
Furthermore, the notch of the mounting groove is a flaring with the diameter gradually increasing from inside to outside, and the flaring is matched with the spherical surface at the front end of the column tooth.
Has the beneficial effects that: can play the centering action to the column tooth, avoid the column tooth slope.
Further, the magnet is a ring magnet.
Has the advantages that: the magnetic lines of force of the annular magnet are distributed densely at the inner ring, and the adoption of the annular magnet can enable the adsorption force of the inner ring of the magnet to the columnar teeth to be larger, thereby facilitating the centering adsorption of the columnar teeth.
Further, the middle part of ring magnet has the through-hole, and the drill way of the notch one side of through-hole towards the mounting groove is the taper mouth of inside-out diameter crescent, the spherical surface adaptation of taper mouth and column tooth front end.
Has the beneficial effects that: the front end of the through hole in the middle of the annular magnet is arranged to be a conical opening matched with the spherical surface at the front end of the stud tooth, so that the magnetic field force direction at the conical opening is perpendicular to the spherical surface at the front end of the stud tooth, and the adsorption effect on the stud tooth is better.
Furthermore, the notch of the mounting groove is a flaring with the diameter gradually increasing from inside to outside, and the flaring is matched with the spherical surface at the front end of the column tooth.
Has the advantages that: can play the centering action to the column tooth, avoid the column tooth slope.
Further, the distance between the maximum diameter department of the notch of mounting groove and the minimum diameter department of the taper mouth of the through-hole of ring magnet is greater than the radius of the sphere of column tooth front end, and the column tooth is laminated mutually with the notch of mounting groove and forms the clearance with the taper mouth of ring magnet when the column tooth is kept in the sleeve pipe by strength magnets.
Has the advantages that: the direct contact of the magnet and the column teeth is avoided, and the adsorption force of the magnet to the column teeth is too strong, so that the column teeth cannot be smoothly separated from the sleeve after being placed into the tooth holes.
Furthermore, a reset spring is arranged in the inner cavity of the sleeve along the axial direction of the sleeve, the reset spring is compressed when the plunger shaft is pushed forwards, and the reset spring reversely pushes the plunger shaft to reset the plunger shaft when the external force is removed.
Has the advantages that: external force is applied to the plunger shaft to enable the reset spring to compress and deform so as to push the column teeth outwards, the plunger shaft can be always kept at an initial position when not affected by the external force through the reset spring, and the column teeth are kept in the inner cavity of the sleeve.
Furthermore, be equipped with the screw hole of radial extension on the plunger shaft, install the screw in the screw hole, anti-disengaging structure is including setting up the rectangular hole along sleeve pipe axial extension on the sleeve pipe, and the screw passes rectangular hole and adorns soon in the screw hole, and the plunger shaft drives the screw and moves about in rectangular hole when moving about.
Has the advantages that: the screw is matched with the long hole to prevent the plunger shaft from being separated from the sleeve outwards, and the plunger shaft anti-disengaging device is simple in structure, convenient to install and reliable in anti-disengaging.
Drawings
Fig. 1 is a schematic structural view of an embodiment 1 of the hot setting tooth clamp of the present invention;
FIG. 2 isbase:Sub>A cross-sectional view taken at A-A of FIG. 1;
in the figure: 1. a plunger shaft; 101. a first shaft section; 102. a second shaft section; 103. a third shaft section; 104. a hand-held portion; 105. mounting grooves; 106. flaring; 2. a screw; 3. a return spring; 4. a sleeve; 401. a step surface; 402. a strip hole; 5. a ring magnet; 501. a middle through hole; 502. a tapered mouth; 6. column teeth; 7. a handle.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present invention are described in further detail below with reference to examples.
The utility model discloses hot inlay gets embodiment 1 of tooth anchor clamps:
as shown in fig. 1, the hot-setting pick-up fixture comprises a sleeve 4, wherein the sleeve 4 is cylindrical, the sleeve 4 is provided with a sleeve inner cavity, a plunger shaft 1 is movably arranged in the sleeve inner cavity along the axial direction of the sleeve 4, one end of the plunger shaft 1 is positioned in the sleeve 4, and the other end of the plunger shaft extends out of the sleeve 4. One end of the plunger shaft 1, which is positioned in the sleeve 4, is provided with a mounting groove 105, the annular magnet 5 is mounted in the mounting groove 105, as shown in fig. 2, the depth of the mounting groove 105 is greater than the thickness of the annular magnet 5, and the annular magnet 5 is integrally embedded in the mounting groove 105 and is fixedly mounted at the groove bottom of the mounting groove 105. Part of the groove wall of the mounting groove 105 is in contact with the magnet, and the rest of the groove wall is magnetized by the magnet and then generates certain adsorption effect on the columnar teeth 6. The annular magnet 5 is in interference fit with the plunger shaft 1. The ring magnet 5 can adsorb two column teeth 6 in the inner cavity of the sleeve at one time.
The ring magnet 5 is provided with a middle through hole 501, the hole opening of the middle through hole 501 facing to the notch side of the mounting groove 105 is a tapered opening 502 with the diameter gradually increasing from inside to outside, and the tapered opening 502 is matched with the spherical surface of the front end of the stud tooth 6. The direction of the magnetic field force at the tapered opening 502 is perpendicular to the spherical surface at the front end of the stud 6, and the stud 6 is better adsorbed. The notch of mounting groove 105 is flaring 106 that the diameter is crescent from inside to outside, and flaring 106 and the spherical surface adaptation of column tooth 6 front end, flaring 106 play the centering effect to column tooth 6, avoid the slope of column tooth 6. The distance between the maximum diameter department of the notch of mounting groove and the minimum diameter department of the bell 502 of the middle part through-hole of ring magnet 5 is greater than the radius of the sphere of the front end of column tooth 6, column tooth 6 is laminated mutually with the notch of mounting groove 105 and forms the clearance with ring magnet's bell 502 when column tooth 6 is kept in sleeve 4 by ring magnet 5 absorption, avoid ring magnet 5 and column tooth 6 direct contact from this, ring magnet 5 is too strong to the adsorption affinity of column tooth 6 and leads to column tooth 6 can not separate with sleeve 4 smoothly after putting into the pick hole.
The inner cavity of the sleeve is also provided with a return spring 3, the return spring 3 is sleeved on the third shaft section 103 of the plunger shaft 1, one end of the return spring 3 is pressed on the end face, facing the third shaft section 103, of the second shaft section 102, a step surface 401 is formed on the inner wall of the sleeve, and the other end of the return spring 3 is pressed on the step surface 401 of the inner wall of the sleeve. When the plunger shaft 1 is pushed forwards, the return spring 3 is compressed, and the plunger teeth 6 at the front end of the plunger shaft 1 are pushed out and placed into the tooth holes; when the plunger shaft 1 is loosened, the return spring 3 reversely pushes the plunger shaft 1 to reset, the plunger shaft 1 is pushed by the return spring 3 until the screw 2 is blocked by the long hole 402, the outward movement cannot be continued, and at this time, the plunger shaft 1 resets.
As shown in fig. 1, a hand-held portion 104 is provided at an end of the plunger shaft 1 extending out of the sleeve 4, a handle 7 is provided at a position close to the hand-held portion 104 outside the sleeve 4, and the handle 7 and the hand-held portion 104 are used in cooperation, so that a worker can conveniently hold the sleeve 4 by hand to apply force to the plunger shaft 1.
The utility model discloses hot setting gets tooth anchor clamps sets up magnet through the one end that is located sleeve pipe 4 at plunger axle 1, produce adsorption affinity to column tooth 6, in order to keep column tooth 6 temporarily adsorbing in the sleeve pipe inner chamber, the workman only needs to exert thrust to the outer one end of the sleeve pipe 4 of stretching out of plunger axle 1 during the setting, alright outwards release column tooth 6 along the sleeve pipe 4 axial and tentatively impress in the tooth hole, the chamfer structure of 6 afterbody of column tooth can produce the frictional force of certain size with the tooth hole this moment, this frictional force is greater than the adsorption affinity of magnet to column tooth 6, thereby make column tooth 6 can keep in the tooth hole and not taken out the tooth hole once more by sleeve pipe 4, put aside behind sleeve pipe 4 with the whole tooth holes of impressing of column tooth 6 and can accomplish hot setting tooth.
This tooth anchor clamps are got to heat inlay only need stretch into the one end installation magnet in the sleeve pipe 4 at being used for of plunger shaft 1, makes magnet have the magnetism of suitable size, can once only adsorb two column teeth 6, alright keep the column teeth 6 adsorb in the sleeve pipe inner chamber, adsorb reliably stably, can prevent effectively that column teeth 6 from droing, and it is very convenient to produce and make. Because the magnet is positioned in the sleeve 4, the magnet is not abraded and scratched with any other object in the using process, so that the magnet is not easily damaged, and the hot-setting tooth taking clamp has a long service life.
Example 2: in the above embodiment 1, the installation groove is provided in the end of the plunger shaft located inside the sleeve, and the ring magnet is installed in the installation groove, whereas in the present embodiment, the plunger shaft end portion is not provided with the installation groove, and the ring magnet is directly bonded to the end portion of the plunger shaft.
Example 3: in above-mentioned embodiment 1, the degree of depth of the last mounting groove of plunger shaft is greater than the thickness of magnet, and the partial cell wall and the magnet contact of back mounting groove in the whole embedding mounting groove of magnet, and in this embodiment, the degree of depth of mounting groove equals the thickness of magnet, in the whole embedding mounting groove of magnet and just in time with the notch parallel and level of mounting groove. In other embodiments, the depth of the mounting groove can be smaller than the thickness of the magnet, and a part of the magnet is embedded into the mounting groove, and the rest part of the magnet extends out of the mounting groove.
Example 4: in the above embodiment 1, the magnet is a ring magnet, and in the present embodiment, the magnet is a circular magnet. In other embodiments, bar magnets may also be employed.
Example 5: in the above embodiment 1, the opening of the middle through hole of the ring magnet on the side of the notch of the mounting groove is a tapered opening with gradually increasing diameter from inside to outside, the tapered opening is adapted to the spherical surface of the front end of the stud tooth, and in this embodiment, the diameters of all parts of the middle through hole are equal.
Example 6: in the above embodiment 1, the notch of the mounting groove for mounting the ring magnet is a flared opening with gradually increasing diameter from inside to outside, and the flared opening is adapted to the spherical surface of the front end of the stud tooth.
Example 7: in the above embodiment 1, the stud tooth is fitted to the notch of the mounting groove and forms a gap with the tapered mouth of the magnet when the stud tooth is held in the sleeve by the magnet, whereas in the present embodiment, the spherical surface of the front end of the stud tooth is fitted to the notch of the mounting groove and the tapered mouth of the magnet simultaneously when the stud tooth is held in the sleeve by the magnet. In other embodiments, the depth of the mounting groove can be further reduced, so that the spherical surface of the front end of the stud tooth only fits with the tapered opening of the magnet when the stud tooth is held in the sleeve by the magnet in an adsorption manner.
Example 8: in the above embodiment 1, the plunger shaft is provided with the threaded hole extending in the radial direction, the threaded hole is provided with the screw, the sleeve is provided with the elongated hole extending in the axial direction of the sleeve, the screw passes through the elongated hole and is rotatably installed in the threaded hole, the plunger shaft is driven to move in the elongated hole when moving so as to prevent the plunger shaft from being removed from the sleeve outward, in this embodiment, the sleeve is provided with the threaded hole extending in the radial direction at a position close to the end portion, the screw is rotatably installed in the threaded hole after the plunger shaft is installed in the sleeve, and the screw can form a stop fit with the plunger shaft so as to prevent the plunger shaft from being removed from the sleeve outward in the axial direction.
The above description is only for the preferred embodiment of the present invention, and the present invention is not limited thereto, the protection scope of the present invention is defined by the claims, and all structural changes equivalent to the contents of the description and drawings of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a tooth anchor clamps are got to hot inlaying which characterized in that: including sleeve pipe (4), sleeve pipe (4) have the sleeve pipe inner chamber, there is plunger shaft (1) along sleeve pipe (4) axial movable mounting in the sleeve pipe inner chamber, the one end of plunger shaft (1) is arranged in the sleeve pipe inner chamber, the other end stretches out outside sleeve pipe (4), be equipped with the anti-disengaging structure who is used for preventing outside the deviating from sleeve pipe (4) of plunger shaft (1) on sleeve pipe (4), the one end that is located sleeve pipe (4) of plunger shaft (1) is equipped with magnet, one or more than two disposable adsorbable column teeth (6) of magnet are in the sleeve pipe inner chamber.
2. The hot setting tooth clamp of claim 1, wherein: one end of the plunger shaft (1) positioned in the sleeve (4) is provided with a mounting groove (105), and the magnet is mounted in the mounting groove (105).
3. The hot setting tooth clamp of claim 2, wherein: the depth of the mounting groove (105) is larger than the thickness of the magnet, and the magnet is integrally embedded into the mounting groove (105) and fixedly mounted at the groove bottom of the mounting groove (105).
4. The hot insert tooth clamp of claim 3, wherein: the notch of the mounting groove (105) is a flared opening (106) with the diameter gradually increasing from inside to outside, and the flared opening (106) is matched with the spherical surface at the front end of the stud tooth (6).
5. The hot setting tooth clamp of any one of claims 1-3, wherein: the magnet is a ring magnet (5).
6. The hot setting tooth clamp of claim 5, wherein: the middle part of the ring-shaped magnet (5) is provided with a through hole,
the hole opening of the through hole, which faces to the side of the notch of the mounting groove (105), is a tapered opening (502) with the diameter gradually increasing from inside to outside, and the tapered opening (502) is matched with the spherical surface at the front end of the stud tooth (6).
7. The hot setting tooth clamp of claim 6, wherein: the notch of the mounting groove (105) is a flared opening (106) with the diameter gradually increasing from inside to outside, and the flared opening (106) is matched with the spherical surface at the front end of the stud tooth (6).
8. The hot setting tooth clamp of claim 7, wherein: the distance between the maximum diameter position of the notch of the mounting groove (105) and the minimum diameter position of the conical opening (502) of the through hole of the annular magnet (5) is larger than the radius of the spherical surface of the front end of the column tooth (6), and when the column tooth (6) is adsorbed and held in the sleeve (4) by the magnet, the column tooth (6) is attached to the notch of the mounting groove (105) and forms a gap with the conical opening (502) of the annular magnet (5).
9. The hot-setting tooth clamp of any one of claims 1-4, wherein: a reset spring (3) is axially arranged in the inner cavity of the sleeve along the sleeve (4), the reset spring (3) is compressed when the plunger shaft (1) is pushed forwards, and the reset spring (3) reversely pushes the plunger shaft (1) to reset when external force is removed.
10. The hot setting tooth clamp of any one of claims 1-4, wherein: be equipped with the screw hole of radial extension on plunger axle (1), install screw (2) in the screw hole, anti-disengaging structure passes rectangular hole (402) and adorns soon in the screw hole along sleeve pipe (4) axial extension including setting up on sleeve pipe (4), screw (2), and drive screw (2) when plunger axle (1) moves about in rectangular hole (402).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222311719.XU CN218016862U (en) | 2022-08-31 | 2022-08-31 | Hot-setting tooth taking clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222311719.XU CN218016862U (en) | 2022-08-31 | 2022-08-31 | Hot-setting tooth taking clamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218016862U true CN218016862U (en) | 2022-12-13 |
Family
ID=84351652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222311719.XU Active CN218016862U (en) | 2022-08-31 | 2022-08-31 | Hot-setting tooth taking clamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218016862U (en) |
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2022
- 2022-08-31 CN CN202222311719.XU patent/CN218016862U/en active Active
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