CN217412305U - High-speed rail switch tie bolt rapid thread rolling mechanism - Google Patents
High-speed rail switch tie bolt rapid thread rolling mechanism Download PDFInfo
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- CN217412305U CN217412305U CN202221177192.XU CN202221177192U CN217412305U CN 217412305 U CN217412305 U CN 217412305U CN 202221177192 U CN202221177192 U CN 202221177192U CN 217412305 U CN217412305 U CN 217412305U
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Abstract
The utility model discloses a high-speed railway switch sleeper bolt rolls silk mechanism fast, including frame, layer board, decide the rolling wheel, move the rolling wheel, feed mechanism and feeding mechanism, the material loading casing is fixed in the frame and is located and decides the rolling wheel top, and the pole portion of bolt raw materials is single row and sets up in the material loading casing, and the oblique lower extreme of material loading casing is equipped with the export that supplies bolt raw materials to shift out, and the export is located directly over the layer board, installs stop device and stock stop on the material loading casing, and stop device is used for the control bolt to get into the export, and stock stop is used for opening and close the export. The utility model discloses a feed mechanism carries out the material loading, taks away the bolt raw materials in feed mechanism exit through feeding mechanism to carry the bolt raw materials to the layer board, can carry out the thread rolling operation fast, improve production efficiency, and the bolt is placed the position control and is accurate, can realize the product standardization, guarantees the bolt quality; because the bolt is not required to be manually placed on the supporting plate, accidents can be avoided, and the production safety is improved.
Description
Technical Field
The utility model relates to a bolt production technical field, especially a high-speed railway switch tie bolt rolls screw mechanism fast.
Background
The high-speed rail turnout sleeper bolt is a bolt specially used for a high-speed rail railway sleeper, has a large size and is generally produced by adopting a thread rolling machine. The existing thread rolling machine comprises a supporting plate, a movable rolling wheel and a fixed rolling wheel, wherein the movable rolling wheel and the fixed rolling wheel are respectively arranged on two main shafts of the thread rolling machine and can synchronously rotate in the same direction under the driving of a transmission mechanism. The fixed rolling wheel is fixed in position, the movable rolling wheel is driven by the oil cylinder to perform radial feeding movement and is close to or far away from the fixed rolling wheel, and the supporting plate is positioned on the movable rolling wheel and the movable rolling wheel.
During thread rolling operation, a worker places bolt raw materials on a supporting plate of a thread rolling machine, holds the end of the bolt raw materials by hand to prevent the bolt from falling off the supporting plate, controls the movable rolling wheel to be close to the fixed rolling wheel, and presses the bolt on the fixed rolling wheel after the movable rolling wheel is contacted with the bolt to realize thread rolling. But the manual operation speed is slow, and the bolt output efficiency is low; the position of the bolt raw material placing supporting plate has deviation, which easily causes the length of rolled threads of bolt products to be inconsistent and influences the product quality; and in production, in order to ensure that the bolt does not fall off the supporting plate, the fingers of a worker continuously contact the bolt, the fingers of the worker loosen the bolt after the bolt is contacted with the rolling wheel to rotate and roll threads, and the fingers are easily hit by the end of the bolt raw material and are also easily twisted into a thread rolling machine, so that danger is easily caused.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is necessary to provide a high-speed rail switch tie bolt thread rolling mechanism for solving the above technical problems.
In order to achieve the purpose, the utility model provides a high-speed railway switch sleeper bolt fast thread rolling mechanism, including frame, layer board, fixed rolling wheel and movable rolling wheel, the layer board is fixed in the frame and is located between fixed rolling wheel and the movable rolling wheel, still includes feed mechanism and feeding mechanism, feed mechanism includes the material loading casing that the slope set up, and the material loading casing is fixed in the frame and is located above the fixed rolling wheel, and the pole portion of bolt raw materials is single-row and sets up in the material loading casing, and the oblique lower extreme of material loading casing is equipped with the export that supplies bolt raw materials to shift out, and the export is located directly over the layer board, installs stop device and stock stop gear on the material loading casing, and stop device is used for controlling the bolt to get into the export, and the stock stop gear is used for opening and close the export; the bolt raw materials in the outlet are conveyed to the supporting plate by the feeding mechanism when the stop mechanism opens the outlet, the feeding mechanism comprises a lifting driving mechanism, a lifting frame, a first linear driving device, a second linear driving device, a first pulling plate, a second pulling plate, a push rod and a push rod, the first pulling plate and the second pulling plate are respectively positioned on two sides of the lifting frame, the first linear driving device and the second linear driving device are installed on the lifting frame, the output end of the first linear driving device is fixedly connected with the push rod through the first pulling plate, and the output end of the second linear driving device is fixedly connected with the pull rod through the second pulling plate.
The stop mechanism comprises a third linear driving device, a connecting rod and a baffle, the third linear driving device is installed on the feeding shell, the baffle is hinged to the feeding shell, and one end of the connecting rod is hinged to the output end of the third linear driving device while the other end of the connecting rod is hinged to the baffle.
The limiting device is a push-pull electromagnet, and the output end of the push-pull electromagnet is positioned in the feeding shell.
And a limiting plate for limiting the moving-out of the bolt raw material end is fixed on one side of the feeding shell.
The lifting driving mechanism comprises a fourth linear driving device, a first guide sleeve and a first guide rod, the fourth linear driving device and the first guide sleeve are installed on the rack, the output end of the fourth linear driving device is connected with the lifting frame, the first guide rod is slidably installed in the first guide sleeve, and the lower end of the first guide rod is connected with the lifting frame.
The lifting frame is provided with a second guide sleeve and a third guide sleeve, a second guide rod is slidably mounted in the second guide sleeve, a third guide rod is slidably mounted in the third guide sleeve, one end of the second guide rod is fixedly connected with the first pulling plate, and one end of the third guide rod is fixedly connected with the second pulling plate.
The baffle is L-shaped in cross section.
Compared with the prior art, the technical scheme has the following beneficial effects:
1. the feeding mechanism is used for feeding, the feeding mechanism is used for taking away the bolt raw material at the outlet of the feeding mechanism, and the bolt raw material is conveyed to the supporting plate, so that the thread rolling operation can be rapidly carried out, the production efficiency is improved, the bolt placement position is accurately controlled, the product standardization can be realized, and the bolt quality is ensured;
2. after the thread rolling is finished, the second linear driving device drives the second pull plate to move inwards, and the push rod pushes the bolt subjected to the thread rolling out of the supporting plate, so that automatic blanking is realized;
3. need not the manual work and place the bolt on the layer board, can avoid meeting accident, improve the production security.
Drawings
FIG. 1 is a schematic view of the first embodiment of the present invention;
FIG. 2 is a schematic view of a partial structure of the feeding mechanism in FIG. 1;
FIG. 3 is another state diagram of the feeding mechanism;
FIG. 4 is a first view of the working state of the feeding mechanism;
FIG. 5 is a second working state diagram of the feeding mechanism;
FIG. 6 is a cross-sectional view taken along line A-A of FIG. 2;
in the figure, 1, a frame; 2. a support plate; 3. a fixed rolling wheel; 4. a moving rolling wheel; 5. feeding a shell; 6. bolt raw materials; 7. an outlet; 8. a limiting device; 9. a lifting frame; 10. a first linear drive device; 11. a second linear drive; 12. a first pulling plate; 13. a second pulling plate; 14. a top rod; 15. a push rod; 16. a third linear drive; 17. a connecting rod; 18. a baffle plate; 19. a limiting plate; 20. a fourth linear drive; 21. a first guide sleeve; 22. a first guide bar; 23. a second guide sleeve; 24. a third guide sleeve; 25. a second guide bar; 26. and a third guide bar.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.
Referring to fig. 1 to 6, in an embodiment provided by the present invention, a high-speed rail switch tie bolt fast thread rolling mechanism includes a frame 1, a supporting plate 2, a fixed rolling wheel 3 and a movable rolling wheel 4, the supporting plate 2 is fixed on the frame 1 and is located between the fixed rolling wheel 3 and the movable rolling wheel 4, the fixed rolling wheel 3 and the movable rolling wheel 4 are driven by a driving mechanism of a thread rolling machine to rotate, the movable rolling wheel 4 is driven by a cylinder of the thread rolling machine to move, the above-mentioned structure that is current thread roller, the utility model discloses a special character lies in, still include feed mechanism and feeding mechanism, feed mechanism includes the material loading casing 5 that the slope set up, material loading casing 5 is fixed on frame 1 and is located the top of rolling wheel 3, the pole portion of bolt raw materials 6 is single row and sets up in material loading casing 5, the interval of material loading casing 5 up-down terminal surface slightly is greater than the diameter of bolt raw materials 6 pole portion, therefore bolt raw materials 6 can not fold in material loading casing 5; the oblique upper end of the feeding shell 5 is of an open structure and can be used for conveniently placing bolt raw materials 6, an outlet 7 for moving out the bolt raw materials 6 is formed in the oblique lower end of the feeding shell 5, the outlet 7 is located right above the supporting plate 2, a limiting device 8 and a material stopping mechanism are mounted on the feeding shell 5, the limiting device 8 is used for controlling bolts to enter the outlet 7, and the material stopping mechanism is used for opening and closing the outlet 7; the feeding mechanism conveys the bolt raw materials 6 at the outlet 7 to the supporting plate 2 when the material blocking mechanism opens the outlet 7, the feeding mechanism comprises a lifting driving mechanism, a lifting frame 9, a first linear driving device 10, a second linear driving device 11, a first pulling plate 12, a second pulling plate 13, a push rod 14 and a push rod 15, the first pulling plate 12 and the second pulling plate 13 are respectively positioned at two sides of the lifting frame 9, the first linear driving device 10 and the second linear driving device 11 are installed on the lifting frame 9, the output end of the first linear driving device 10 is fixedly connected with the push rod 14 through the first pulling plate 12, and the output end of the second linear driving device 11 is fixedly connected with the pull rod through the second pulling plate 13. The first linear driving device 10 is a servo air cylinder or an electric cylinder, which is convenient for controlling the precise movement of the top rod 14. The second linear driving device 11 is provided with a servo cylinder or an electric cylinder, so that the push rod 15 can be controlled to move accurately, and the bolt can be clamped and pushed conveniently.
In order to open and close the outlet 7 conveniently, as shown in fig. 2 and 3, the material blocking mechanism is provided to include a third linear driving device 16, a connecting rod 17 and a baffle 18, the third linear driving device 16 is mounted on the feeding housing 5, the baffle 18 is hinged to the feeding housing 5, one end of the connecting rod 17 is hinged to the output end of the third linear driving device 16, and the other end of the connecting rod 17 is hinged to the baffle 18. The third linear driving device 16 is a servo cylinder, and can also be an electric cylinder. The third linear driving device 16 drives the baffle 18 to move through the connecting rod 17, and as shown in fig. 3, when the telescopic end of the third linear driving device 16 contracts, the baffle 18 is pulled to rotate upwards to open the outlet 7; when the telescopic end of the third linear driving device 16 extends, the baffle 18 is pushed to rotate downwards to close the outlet 7, as shown in fig. 2.
In order to conveniently limit the bolt raw materials 6 and control the bolt raw materials 6 to pass through, as shown in fig. 2, a limiting device 8 is arranged to be a push-pull electromagnet, and the output end of the push-pull electromagnet is positioned in the feeding shell 5. The push-pull electromagnet adopts the push-pull electromagnet with the spring type telescopic end extending normally, when the push-pull electromagnet is not powered on, the telescopic end of the push-pull electromagnet is positioned in the feeding shell 5, the bolt raw material 6 is limited to pass through, when the push-pull electromagnet is powered on, the telescopic end of the push-pull electromagnet contracts above the feeding shell 5, the bolt raw material 6 is not blocked to pass through, the bolt raw material 6 can slide to the outlet 7, and under the blocking of the baffle plate 18, only one bolt raw material 6 exists between the baffle plate 18 and the limiting device 8.
In order to prevent the bolt from moving out of the feeding shell 5 axially, as shown in fig. 1 and 6, a limiting plate 19 for limiting the movement of the end of the bolt raw material 6 is fixed on one side of the feeding shell 5. The bolt head is located between material loading casing 5 and limiting plate 19, can avoid the bolt to break away from material loading casing 5, and under the action of gravity, the bolt is gliding naturally in material loading casing 5.
In order to facilitate the lifting of the lifting frame 9, as shown in fig. 1 and 4, the lifting driving mechanism comprises a fourth linear driving device 20, a first guide sleeve 21 and a first guide rod 22, the fourth linear driving device 20 and the first guide sleeve 21 are installed on the machine frame 1, the output end of the fourth linear driving device 20 is connected with the lifting frame 9, the first guide rod 22 is slidably installed in the first guide sleeve 21, and the lower end of the first guide rod 22 is connected with the lifting frame 9. The first guide sleeve 21 and the first guide rod 22 play a guiding role, so that the fourth linear driving device 20 can drive the lifting frame 9 to stably and linearly lift. The fourth linear driving device 20 is a servo cylinder, and can also be an electric cylinder.
In order to make the first pulling plate 12 and the second pulling plate 13 move smoothly, as shown in fig. 4, a second guide sleeve 23 and a third guide sleeve 24 are installed on the lifting frame 9, a second guide rod 25 is installed in the second guide sleeve 23 in a sliding manner, a third guide rod 26 is installed in the third guide sleeve 24 in a sliding manner, one end of the second guide rod 25 is fixedly connected with the first pulling plate 12, and one end of the third guide rod 26 is fixedly connected with the second pulling plate 13. The second guide sleeve 23 and the second guide rod 25 play a role in guiding the first pulling plate 12, so that the first pulling plate 12 can stably and linearly move under the driving of the first linear driving device 10; the third guide sleeve 24 and the third guide rod 26 guide the second pulling plate 13, so that the second pulling plate 13 can move in a stable straight line under the driving of the second straight line driving device 11.
In order to open and close the outlet 7, the bolt at the outlet 7 is supported, and meanwhile, after the outlet 7 is opened, the bolt can vertically move downwards out of the outlet 7, and as shown in fig. 2 and 3, the cross section of the baffle plate 18 is arranged to be L-shaped. The bottom of the baffle 18 can bear bolts, the outlet 7 is opened after the baffle 18 is screwed up, the bolts are not borne, and meanwhile, the passage through which the bolts can fall is avoided, and the bolts cannot be blocked from falling.
In the embodiment, all the electrical components are connected to the controller of the thread rolling machine through the wires to meet the control requirements, and the specific connection and control sequence should be referred to in the following working principle that the electrical components are electrically connected in sequence.
The working steps of the embodiment are as follows:
s1, the fourth linear driving device 20 drives the lifting frame 9 to ascend, so that the ejector rod 14 and the push rod 15 ascend to two sides of the outlet 7;
s2, the first linear driving device 10 and the second linear driving device 11 work simultaneously, so that the first pulling plate 12 and the second pulling plate 13 are folded and move inwards, the ejector rod 14 is in contact with one end of the bolt raw material 6, the push rod 15 is in contact with the other end of the bolt raw material 6, and the ejector rod 14 and the push rod 15 are matched to clamp the bolt raw material 6;
s3, the third linear driving device 16 pulls the connecting rod 17, and the connecting rod 17 drives the baffle 18 to rotate upwards to open the outlet 7;
s4, the fourth linear driving device 20 drives the lifting frame 9 to descend, the ejector rod 14 and the push rod 15 clamp the bolt raw material 6, the bolt raw material 6 is moved out of the feeding shell 5 from the outlet 7 and descends to the supporting plate 2, the bolt raw material 6 is abutted against the supporting plate 2, then the second linear driving device 11 drives the second pull plate 13 to move towards the outside, the push rod 15 is far away from the bolt raw material 6, the position of the ejector rod 14 is temporarily fixed, so that the end of the bolt raw material 6 is abutted, and the bolt is prevented from being separated from the supporting plate 2; during the process, the third linear driving device 16 pushes the connecting rod 17 to move, the connecting rod 17 drives the baffle 18 to rotate downwards to reset, the outlet 7 is closed again, after the limiting device 8 is opened, the telescopic end of the push-pull electromagnet contracts to not block the bolt raw materials 6, so that one bolt raw material 6 passes through and moves to the outlet 7, then the push-pull electromagnet is powered off, the telescopic end of the push-pull electromagnet automatically extends out under the action of the elastic restoring force of the spring, other bolt raw materials 6 above the oblique direction are blocked again, and single discharging is achieved;
s5, driving the movable rolling wheel 4 to perform radial feed motion by an oil cylinder of the thread rolling machine, enabling the movable rolling wheel to approach the fixed rolling wheel 3, rolling the bolt raw material 6 on the supporting plate 2, driving the first pull plate 12 to move outwards by the first linear driving device 10 after the thread rolling is started, and enabling the ejector rod 14 to be far away from the end of the bolt raw material 6;
s6, after the thread rolling is finished, the oil cylinder of the thread rolling machine drives the movable rolling wheel 4 to be far away from the fixed rolling wheel 3, then the second linear driving device 11 drives the second pulling plate 13 to move inwards, the push rod 15 is close to the bolt, and the bolt after the thread rolling is pushed out of the supporting plate 2;
s7, the first linear driving device 10 drives the first pulling plate 12 to move inwards, the second linear driving device 11 drives the second pulling plate 13 to move outwards, and the fourth linear driving device 20 drives the lifting frame 9 to ascend, so that the ejector rod 14 and the push rod 15 are reset to be in an S1 state; the thread rolling operation is performed in such a cycle.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and for simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Furthermore, 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 implicitly indicating the 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 explicitly defined 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; can be mechanically or electrically connected; 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 present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Claims (7)
1. A high-speed rail switch sleeper bolt rapid thread rolling mechanism comprises a rack (1), a supporting plate (2), a fixed rolling wheel (3) and a movable rolling wheel (4), wherein the supporting plate (2) is fixed on the rack (1) and is positioned between the fixed rolling wheel (3) and the movable rolling wheel (4), the mechanism is characterized by further comprising a feeding mechanism and a feeding mechanism, the feeding mechanism comprises a feeding shell (5) which is obliquely arranged, the feeding shell (5) is fixed on the rack (1) and is positioned above the fixed rolling wheel (3), rod parts of bolt raw materials (6) are arranged in the feeding shell (5) in a single row, an outlet (7) for moving out the bolt raw materials (6) is arranged at the oblique lower end of the feeding shell (5), the outlet (7) is positioned right above the supporting plate (2), a limiting device (8) and a material blocking mechanism are installed on the feeding shell (5), the limiting device (8) is used for controlling the bolt to enter the outlet (7), the material blocking mechanism is used for opening and closing the outlet (7); the bolt raw materials (6) at the outlet (7) are conveyed to the supporting plate (2) by the feeding mechanism when the material blocking mechanism opens the outlet (7), the feeding mechanism comprises a lifting driving mechanism, a lifting frame (9), a first linear driving device (10), a second linear driving device (11), a first pulling plate (12), a second pulling plate (13), a push rod (14) and a push rod (15), the first pulling plate (12) and the second pulling plate (13) are respectively positioned on two sides of the lifting frame (9), the first linear driving device (10) and the second linear driving device (11) are installed on the lifting frame (9), the output end of the first linear driving device (10) is fixedly connected with the push rod (14) through the first pulling plate (12), and the output end of the second linear driving device (11) is fixedly connected with the pull rod through the second pulling plate (13).
2. The high-speed rail switch tie bolt rapid thread rolling mechanism according to claim 1, wherein the stop mechanism comprises a third linear driving device (16), a connecting rod (17) and a baffle (18), the third linear driving device (16) is installed on the feeding shell (5), the baffle (18) is hinged with the feeding shell (5), one end of the connecting rod (17) is hinged with the output end of the third linear driving device (16), and the other end of the connecting rod is hinged with the baffle (18).
3. The high-speed rail switch tie bolt rapid thread rolling mechanism according to claim 1, wherein the limiting device (8) is a push-pull electromagnet, and an output end of the push-pull electromagnet is positioned in the feeding shell (5).
4. The high-speed rail switch tie bolt rapid thread rolling mechanism according to claim 1, wherein a limiting plate (19) for limiting the end of the bolt raw material (6) to move out is fixed on one side of the feeding shell (5).
5. The high-speed rail switch tie bolt rapid thread rolling mechanism according to claim 1, wherein the lifting driving mechanism comprises a fourth linear driving device (20), a first guide sleeve (21) and a first guide rod (22), the fourth linear driving device (20) and the first guide sleeve (21) are installed on the rack (1), the output end of the fourth linear driving device (20) is connected with the lifting frame (9), the first guide rod (22) is slidably installed in the first guide sleeve (21), and the lower end of the first guide rod (22) is connected with the lifting frame (9).
6. The high-speed rail switch tie bolt rapid thread rolling mechanism according to claim 1, wherein a second guide sleeve (23) and a third guide sleeve (24) are installed on the lifting frame (9), a second guide rod (25) is installed in the second guide sleeve (23) in a sliding mode, a third guide rod (26) is installed in the third guide sleeve (24) in a sliding mode, one end of the second guide rod (25) is fixedly connected with the first pulling plate (12), and one end of the third guide rod (26) is fixedly connected with the second pulling plate (13).
7. The high-speed rail switch tie bolt thread rolling mechanism according to claim 2, wherein the cross section of the baffle plate (18) is L-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221177192.XU CN217412305U (en) | 2022-05-17 | 2022-05-17 | High-speed rail switch tie bolt rapid thread rolling mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221177192.XU CN217412305U (en) | 2022-05-17 | 2022-05-17 | High-speed rail switch tie bolt rapid thread rolling mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217412305U true CN217412305U (en) | 2022-09-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221177192.XU Active CN217412305U (en) | 2022-05-17 | 2022-05-17 | High-speed rail switch tie bolt rapid thread rolling mechanism |
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| Country | Link |
|---|---|
| CN (1) | CN217412305U (en) |
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2022
- 2022-05-17 CN CN202221177192.XU patent/CN217412305U/en active Active
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