CN218640626U - Fist end welding type axle and engineering vehicle - Google Patents
Fist end welding type axle and engineering vehicle Download PDFInfo
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- CN218640626U CN218640626U CN202222985421.7U CN202222985421U CN218640626U CN 218640626 U CN218640626 U CN 218640626U CN 202222985421 U CN202222985421 U CN 202222985421U CN 218640626 U CN218640626 U CN 218640626U
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Abstract
The utility model discloses a fist end welding formula axle and engineering vehicle, fist end welding formula axle includes axle main shaft and fist end piece, the axle main shaft includes the main shaft section, first epitaxial board and second epitaxial board all outwards extend and relative interval sets up from the one end of main shaft section, fist end piece is arranged in between first epitaxial board and the second epitaxial board and including interior tip and outer tip, outer tip sets up link up the connecting hole that sets up and welded connection with first epitaxial board and the laminating of second epitaxial board respectively, interior tip respectively with main shaft section welded connection in the direction of staggering first epitaxial board and second epitaxial board, then can make axle main shaft and fist end piece's welding seam stagger the setting in the not equidirectional, thereby can reach the mesh of avoiding welding seam stress concentration and appearing the fracture in welding seam department, can also reduce welded number of piles and channel number simultaneously, need not to control temperature between the layer strictly, cooling latency has been shortened, production efficiency has been promoted.
Description
Technical Field
The utility model belongs to the technical field of the vehicle processing is made, concretely relates to fist end welding formula axle and engineering vehicle.
Background
Axles are an important component of vehicles, and are usually connected to a vehicle frame (or a load-bearing vehicle body) via a suspension, and wheels are mounted at both ends. The vertical load born by the frame is transmitted to the wheels through the axle, and the rolling resistance, the driving force, the braking force, the lateral force and the torque born by the wheels are transmitted to the suspension through the axle, so the axle mainly plays a role in transmitting the acting force and the torque between the axle and the wheels.
At present, the less one end of engineering vehicle front axle bearing tonnage adopts forges the front axle, and bear the great welded type front axle that all adopts of tonnage, wherein welded type front axle can be divided into about fist end welded type front axle and upper and lower swizzle seat welded type front axle again, but present about fist end welded type front axle generally is formed by middle axle main shaft and two fist end welding, set up to square butt weld between axle main shaft and the fist end, and the welding seam dorsal zone grommet, square butt weld leads to welding seam stress concentration obvious, it is the weakest region of whole axle stress, the easy phenomenon of ftractureing takes place in welding seam department, and in order to guarantee welding strength, need adopt multilayer multichannel welding mode during the welding, still need strict control interlaminar temperature during the welding, welding seam cooling latency is longer, low in production efficiency.
SUMMERY OF THE UTILITY MODEL
To foretell defect or not enough, the utility model provides a fist end welding formula axle and engineering vehicle aims at solving and adopts square butt weld and lead to welding seam stress concentration obvious and the technical problem of the phenomenon of ftractureing appears easily between axle main shaft and the fist end.
In order to achieve the above object, the utility model provides a fist end welding type axle, wherein, fist end welding type axle includes: axle spindles and fist end pieces; the axle main shaft comprises a main shaft section, a first extension plate and a second extension plate, wherein the first extension plate and the second extension plate extend outwards from one end of the main shaft section and are arranged at intervals relatively; the fist end part is arranged in between first epitaxial plate and the second epitaxial plate and is including the tip that is close to the interior tip that the main shaft section set up and keep away from the outer tip that the main shaft section set up, and the outer tip is seted up and is link up the connecting hole that sets up and laminate setting and welded connection with first epitaxial plate and second epitaxial plate respectively, and the tip is respectively with main shaft section welded connection in the direction of first epitaxial plate and the second epitaxial plate that staggers.
The embodiment of the utility model provides an in, the main shaft section includes the roof, bottom plate and two curb plates, relative interval sets up about roof and bottom plate, both sides and bottom plate and roof are connected around the bottom plate to two curb plate parts, first epitaxial plate and second epitaxial plate one-to-one outwards extend and stretch out in the curb plate setting from the same one end of roof and bottom plate, the upper and lower relative both sides of outer tip laminate the setting and all follow fore-and-aft direction welded connection with first epitaxial plate and second epitaxial plate one-to-one respectively, interior tip respectively with two curb plates along upper and lower direction welded connection.
The embodiment of the utility model provides an in, interior tip stretches into the main shaft section setting, and the relative both sides in the front and back of interior tip set up and all offer along the upper and lower direction first welding groove that extends the setting with the inner wall laminating of two curb plates respectively.
The embodiment of the utility model provides an in, the relative both sides in front and back of interior tip all are higher than the relative both sides setting in front and back of outer tip to first welding groove is close to outer tip setting.
In an embodiment of the present invention, the first welding groove is a V-shaped groove.
The embodiment of the utility model provides an in, the connecting hole is followed the upper and lower direction and is extended and link up the outer tip, and first epitaxial plate and second epitaxial plate correspond the connecting hole and have all been seted up the butt joint hole.
The embodiment of the utility model provides an in, the one end that the main shaft section was kept away from to first epitaxial plate and second epitaxial plate all sets up the second welding groove that extends the setting along the fore-and-aft direction.
In the embodiment of the present invention, a reinforcing plate is provided in the main shaft section.
In order to realize the above object, the utility model provides an engineering vehicle is still provided, wherein, engineering vehicle includes according to above fist end welding formula axle.
Through the technical scheme, the embodiment of the utility model provides a fist end welding type axle that provides has following beneficial effect:
when the fist end welding type axle is used, the axle spindle comprises a main shaft section, a first extension plate and a second extension plate, the first extension plate and the second extension plate both extend outwards from one end of the main shaft section and are arranged at intervals relatively, the fist end part is arranged between the first extension plate and the second extension plate, namely the first extension plate and the second extension plate can cover two opposite sides of the fist end part, the outer end part of the fist end part is respectively attached to the first extension plate and the second extension plate and is welded and connected with the first extension plate and the second extension plate, the inner end part is respectively welded and connected with the main shaft section in the direction of staggering the first extension plate and the second extension plate, namely one opposite side of the fist end part can be respectively welded and connected with the first extension plate and the second extension plate of the axle spindle on the outer end part, the other opposite side of the fist end part can be respectively welded and connected with the main shaft section of the axle spindle on the inner end part, the axle spindle and the axle spindle can be arranged in different directions in a staggered mode, therefore, stress concentration of welding seams and cracking at the seams can be avoided, the purpose of further reducing the number of welding and the production waiting for reducing the temperature and the number of the production can be reduced, and the production time is shortened.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide an understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention, but do not constitute a limitation of the invention. In the drawings:
fig. 1 is a schematic cross-sectional structure view of a fist-end welded axle according to an embodiment of the present invention;
FIG. 2 is an enlarged schematic view at A in FIG. 1;
FIG. 3 is a schematic structural view of a fist-end welded axle according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a fist end piece according to an embodiment of the invention;
fig. 5 is a manufacturing flow chart of a fist-end welding type axle according to the utility model discloses an embodiment.
Description of the reference numerals
100. Axle main shaft 101 main shaft section
102. First epitaxial plate 103 second epitaxial plate
104. Top plate 105 bottom plate
106. Side plate 107 butt joint hole
108. Second welding groove 109 reinforcing plate
200. Inner end of fist end piece 201
202. First welding groove of outer end 203
204. Connecting hole
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It should be understood that the description herein of specific embodiments is for purposes of illustration and explanation only and is not intended to limit the invention.
The fist end welding type axle and the engineering vehicle of the utility model are described below with reference to the attached drawings.
As shown in fig. 1 and 4, the utility model provides a fist end welding formula axle, wherein, fist end welding formula axle includes:
the axle spindle 100 comprises a spindle section 101, a first extension plate 102 and a second extension plate 103, wherein the first extension plate 102 and the second extension plate 103 extend outwards from one end of the spindle section 101 and are arranged at intervals;
the fist end piece 200 is arranged between the first extension board 102 and the second extension board 103 and comprises an inner end portion 201 arranged close to the main shaft section 101 and an outer end portion 202 arranged far away from the main shaft section 101, the outer end portion 202 is provided with a connecting hole 204 which penetrates through the outer end portion and is respectively attached to the first extension board 102 and the second extension board 103 and is connected with the first extension board 102 and the second extension board 103 in a welding mode, and the inner end portion 201 is respectively connected with the main shaft section 101 in a welding mode in the direction of staggering the first extension board 102 and the second extension board 103.
When the boxing welded axle is used, because the axle spindle 100 comprises the spindle section 101, the first extension plate 102 and the second extension plate 103 both extend outwards from one end of the spindle section 101 and are arranged at intervals, the boxing end piece 200 is arranged between the first extension plate 102 and the second extension plate 103, namely the first extension plate 102 and the second extension plate 103 can cover two opposite sides of the boxing end piece 200, the outer end part 202 of the boxing end piece 200 is respectively attached to and welded with the first extension plate 102 and the second extension plate 103, the inner end part 201 is respectively welded with the spindle section 101 in the direction of staggering the first extension plate 102 and the second extension plate 103, namely one opposite side of the boxing end piece 200 can be respectively welded and connected with the first extension plate 102 and the second extension plate 103 of the axle spindle 100 on the outer end part 202, and the other opposite side of the end piece 200 can be respectively welded and connected with the spindle section 101 of the spindle 100 on the inner end part 201, so that the welding temperature of the boxing end piece 200 and the welding seam of the spindle 100 can be strictly controlled, the welding seam can be further, the stress of the welding seam can be prevented from being reduced, and the stress of the axle spindle can be further reduced, and the stress of the axle spindle can be reduced.
It should be noted that, the first extension plate 102 and the second extension plate 103 are disposed at both left and right ends of the main shaft section 101, the number of the fist end pieces 200 is two, and the two fist end pieces 200 are disposed at both ends of the main shaft section 101.
Referring to fig. 1 to 3, in the embodiment of the present invention, the main shaft section 101 includes a top plate 104, a bottom plate 105 and two side plates 106, the top plate 104 and the bottom plate 105 are disposed at an interval from top to bottom, the two side plates 106 are disposed on the front and back sides of the bottom plate 105 and are connected to the bottom plate 105 and the top plate 104, the first extension plate 102 and the second extension plate 103 extend outward from the same end of the top plate 104 and the bottom plate 105 and extend out of the side plate 106 in a one-to-one manner, the upper and lower opposite sides of the outer end portion 202 are respectively attached to the first extension plate 102 and the second extension plate 103 in a one-to-one manner and are all welded together along the front and back directions, and the inner end portion 201 is respectively welded together with the two side plates 106 along the upper and lower directions. Namely, the first extension plate 102 belongs to the extension plate of the top plate 104 of the main shaft section 101, the second extension plate 103 belongs to the extension plate of the bottom plate 105 of the main shaft section 101, the first extension plate 102 and the second extension plate 103 are arranged at intervals, and the fist end piece 200 is arranged between the first extension plate 102 and the second extension plate 103, so that the fist end piece 200 can be covered and hidden in the up and down direction of the fist end piece 200. Meanwhile, it should be particularly noted that the upper and lower opposite sides of the outer end portion 202 may be an upper end surface and a lower end surface, the upper end surface and the lower end surface of the outer end portion 202 are respectively connected to the first extension plate 102 and the second extension plate 103 in a one-to-one welding manner, the welding seams are extended in the front-rear direction, the inner end portion 201 is respectively connected to the two side plates 106 in a welding manner, and the welding seams are extended in the up-down direction, so that the welding seams of the fist end part 200 and the axle spindle 100 may be staggered in the front-rear direction and in the up-down direction.
In another embodiment of the present invention, the first extension board 102 and the second extension board 103 can also extend outward from the same end of the two side boards 106 and extend out of the top board 104 and the bottom board 105 in a one-to-one correspondence manner, the front and back opposite sides of the outer end portion 202 are respectively attached to the first extension board 102 and the second extension board 103 in a one-to-one correspondence manner and are all welded and connected along the up-down direction, and the inner end portion 201 is respectively welded and connected with the top board 104 and the bottom board 105 along the front and back direction.
As shown in fig. 1, fig. 2 and fig. 4, in the embodiment of the present invention, the inner end portion 201 extends into the main shaft section 101, and the front and back opposite sides of the inner end portion 201 are respectively attached to the inner walls of the two side plates 106 and are both provided with the first welding groove 203 extending in the up-down direction. It should be particularly noted that, the front and back opposite sides of the inner end portion 201 may be a front side and a back side, that is, the inner end portion 201 of the fist end piece 200 may be hidden in the main shaft section 101, so that the welding seam between the inner end portion 201 and the side plate 106 of the main shaft section 101 may be located between the front side of the inner end portion 201 and the corresponding side plate 106 or between the back side and the corresponding side plate 106, instead of directly butting the inner end of the inner end portion 201, which is disposed toward the main shaft section 101, directly against the side plate 106 of the main shaft section 101 and welding between the end portion and the inner end of the side plate 106, which significantly further improves the welding strength. Meanwhile, the first welding groove 203 is formed in the front side and the rear side of the inner end portion 201, and compared with the case where the first welding groove 203 is formed in the side plate 106, the welding strength can be obviously improved. In addition, the upper and lower opposite sides of the inner end 201 are respectively attached to the inner walls of the top plate 104 and the bottom plate 105, that is, the upper end surface of the outer end 202 and the upper end surface of the inner end 201 are on the same plane, and the lower end surface of the outer end 202 and the lower end surface of the inner end 201 are on the same plane.
In the embodiment of the present invention, the front and rear opposite sides of the inner end portion 201 are higher than the front and rear opposite sides of the outer end portion 202, and the first welding groove 203 is provided near the outer end portion 202. It should be noted that the two side plates 106 cover both front and rear sides of the inner end portion 201, but do not cover both front and rear sides of the outer end portion 202. The first welding groove 203 is provided near the outer end 202, that is, the distance between the weld between the inner end 201 and the side plate 106 and the weld between the outer end 202 and the top plate 104 or the bottom plate 105 is reduced.
In the embodiment of the present invention, the first welding groove 203 may be a V-shaped groove, which is convenient for processing. Of course, the present invention is not limited thereto, and the first welding groove 203 may be a groove having another shape.
In the embodiment of the present invention, the connecting hole 204 extends through the outer end 202 along the vertical direction, and the first epitaxial plate 102 and the second epitaxial plate 103 have been provided with the butt-joint hole 107 corresponding to the connecting hole 204. Specifically, the connecting hole 204 on the fist end piece 200 is used for pin connection, and the first extension board 102 and the second extension board 103 extend outwards to form the abutting hole 107 corresponding to the connecting hole 204, that is, the first extension board 102 and the second extension board 103 can substantially cover the outer end portion 202, so that the outer end portion 202 can be reinforced and protected, and of course, the fist end piece 200 can also be positioned.
Referring to fig. 2, in the embodiment of the present invention, the ends of the first extension plate 102 and the second extension plate 103, which are far away from the main shaft section 101, are both provided with a second welding groove 108. That is, the second welding groove 108 is opened on the first extension plate 102 and the second extension plate 103, and the first welding groove 203 is opened on the inner end portion 201, that is, the weld bodies in different directions are different, which is further beneficial to avoiding weld stress concentration. In addition, the second welding groove 108 is located at an end of the first extension plate 102 and the second extension plate 103 away from the main shaft section 101, so as to facilitate the welding operation.
Specifically, the second welding bevel 108 is a bevel cut formed at an end of the first outer extension plate 102 or the second outer extension plate 103 away from the main shaft section 101, a first bevel cut forming the bevel cut of the first outer extension plate 102 is arranged to be inclined downward from the end surface of the main shaft section 101 toward the inner end 201, and a second bevel cut forming the bevel cut of the second outer extension plate 103 is arranged to be inclined upward from the end surface of the main shaft section 101 toward the inner end 201.
Referring to fig. 1 again, in the embodiment of the present invention, a reinforcing plate 109 may be disposed in the main shaft section 101, and the reinforcing plate 109 and the cross section of the main shaft section 101 are disposed in parallel, so as to increase the strength of the cross section and reduce the distortion.
As shown in fig. 5, the manufacturing steps of the boxed welded axle include:
The top plate 104 with the first extension plate 102, the bottom plate 105 with the second extension plate 103 and the two side plates 106 are prefabricated, the two ends of the first extension plate 102 and the two ends of the second extension plate 103 are respectively provided with a second welding groove 108, the connecting holes 204 in the fist end pieces 200 corresponding to the first extension plate 102 and the second extension plate 103 are respectively provided with a butt-joint hole 107, and then the top plate 104 with the first extension plate 102, the bottom plate 105 with the second extension plate 103 and the two side plates 106 are welded to form the axle spindle 100.
A first welding bevel 203 is provided on the front side and the rear side of an inner end 201 of the fist end piece 200, and a mounting hole penetrating the fist end piece 200 is provided on the upper end face or the lower end face of the fist end piece 200.
Step 300, placing the fist end piece 200 between the first extension plate 102 and the second extension plate 103, so that the outer end 202 of the fist end piece 200 is attached to the first extension plate 102 and the second extension plate 103 respectively.
Specifically, the inner end 201 of the fist end piece 200 extends into the main shaft section 101, the outer end 202 is placed outwards and located between the first extension board 102 and the second extension board 103, so that the outer end 202 of the fist end piece 200 is respectively attached to the first extension board 102 and the second extension board 103, and the upper end and the lower end of the mounting hole in the fist end piece 200 are respectively arranged corresponding to the abutting holes 107 in the first extension board 102 and the second extension board 103.
In step 400, the inner end part 201 of the fist end piece 200 is welded with the main shaft section 101 in the direction of staggering the first extension plate 102 and the second extension plate 103, and the outer end part 202 of the fist end piece 200 is welded with the first extension plate 102 and the second extension plate 103.
Specifically, since the welding seam of the inner end portion 201 and the side plate 106 of the main shaft section 101 is located at the inner side, the inner end portion 201 and the side plate 106 may be welded and connected, and then the outer end portion 202 and the first outer extension plate 102 and the second outer extension plate 103 may be welded and connected, respectively. Meanwhile, the welding lines of the axle spindle 100 and the fist end piece 200 are arranged in a staggered mode in different directions, so that the purposes of avoiding weld stress concentration and cracking at the welding line can be achieved, the number of layers and the number of tracks of welding can be reduced, a two-layer two-way welding mode is adopted, the temperature between layers does not need to be strictly controlled, the welding line cooling waiting time is shortened, and the production efficiency is further improved.
In order to achieve the above object, the utility model also provides an engineering vehicle, wherein, engineering vehicle includes according to above fist end welding formula axle. Since the engineering vehicle adopts all the technical solutions of the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.
In the description of the present invention, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (9)
1. The utility model provides a fist end welded axle, its characterized in that, fist end welded axle includes:
the axle spindle (100) comprises a spindle section (101), a first extension plate (102) and a second extension plate (103), wherein the first extension plate (102) and the second extension plate (103) both extend outwards from one end of the spindle section (101) and are arranged at intervals oppositely;
the fist end piece (200) is arranged between the first extension board (102) and the second extension board (103) and comprises an inner end portion (201) close to the spindle section (101) and an outer end portion (202) far away from the spindle section (101), the outer end portion (202) is provided with a connecting hole (204) penetrating through the first extension board (102) and the second extension board (103) and is attached to the first extension board (102) and the second extension board (103) and connected with the first extension board (102) and the second extension board (103) in a welded mode, and the inner end portion (201) is connected with the spindle section (101) in a welded mode in the direction of staggering the first extension board (102) and the second extension board (103).
2. A fist-end welded axle according to claim 1, wherein the main shaft section (101) comprises a top plate (104), a bottom plate (105) and two side plates (106), the top plate (104) and the bottom plate (105) are arranged in an up-down opposite spaced manner, the two side plates (106) are respectively arranged on the front side and the rear side of the bottom plate (105) and are connected with the bottom plate (105) and the top plate (104), the first extension plate (102) and the second extension plate (103) are arranged to extend outwards from the same end of the top plate (104) and the bottom plate (105) and extend out of the side plates (106) in a one-to-one correspondence manner, the upper side and the lower side of the outer end portion (202) are respectively attached to the first extension plate (102) and the second extension plate (103) in a one-to-one correspondence manner and are both welded in the front-to-back direction, and the inner end portion (201) is respectively welded to the two side plates (106) in the up-down direction.
3. A fist-end welded axle according to claim 2, wherein the inner end portion (201) extends into the main shaft section (101), and the front and rear opposite sides of the inner end portion (201) are respectively attached to the inner walls of the two side plates (106) and are provided with first welding grooves (203) extending in the up-down direction.
4. A fist-end welded axle according to claim 3, wherein the inner end (201) is positioned higher on both front and rear opposite sides than the outer end (202), and the first welding groove (203) is positioned close to the outer end (202).
5. A boxed welded axle according to claim 3, characterised in that the first welding bevel (203) is a V-bevel.
6. A fist-end welded axle according to claim 2, wherein the connecting hole (204) extends through the outer end (202) along the vertical direction, and the first extension plate (102) and the second extension plate (103) are provided with butt holes (107) corresponding to the connecting hole (204).
7. A fist-end welded axle according to claim 2, wherein the ends of the first extension plate (102) and the second extension plate (103) far away from the main shaft section (101) are provided with second welding grooves (108) along the front-back direction.
8. Boxing welded axle in accordance with any one of claims 1 to 7, wherein a reinforcement plate (109) is provided in the main shaft section (101).
9. A work vehicle, characterized in that it comprises a boxer-welded axle according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222985421.7U CN218640626U (en) | 2022-11-09 | 2022-11-09 | Fist end welding type axle and engineering vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222985421.7U CN218640626U (en) | 2022-11-09 | 2022-11-09 | Fist end welding type axle and engineering vehicle |
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| CN218640626U true CN218640626U (en) | 2023-03-17 |
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| CN202222985421.7U Active CN218640626U (en) | 2022-11-09 | 2022-11-09 | Fist end welding type axle and engineering vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116077160A (en) * | 2023-04-11 | 2023-05-09 | 北京爱康宜诚医疗器材有限公司 | Spinal traction device |
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2022
- 2022-11-09 CN CN202222985421.7U patent/CN218640626U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116077160A (en) * | 2023-04-11 | 2023-05-09 | 北京爱康宜诚医疗器材有限公司 | Spinal traction device |
| CN116077160B (en) * | 2023-04-11 | 2023-07-14 | 北京爱康宜诚医疗器材有限公司 | Spinal traction device |
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