CN112536636A - Rotating shaft braking device for numerical control machine tool - Google Patents
Rotating shaft braking device for numerical control machine tool Download PDFInfo
- Publication number
- CN112536636A CN112536636A CN202011317463.2A CN202011317463A CN112536636A CN 112536636 A CN112536636 A CN 112536636A CN 202011317463 A CN202011317463 A CN 202011317463A CN 112536636 A CN112536636 A CN 112536636A
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- rotating shaft
- wall
- groove
- machine tool
- plate
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/02—Driving main working members
- B23Q5/04—Driving main working members rotary shafts, e.g. working-spindles
- B23Q5/06—Driving main working members rotary shafts, e.g. working-spindles driven essentially by fluid pressure or pneumatic power
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/22—Feeding members carrying tools or work
- B23Q5/34—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission
Abstract
The invention discloses a rotating shaft braking device for a numerical control machine, which has the advantage of reducing the time of rotating a rotating shaft due to inertia after the machining is finished, relates to the field of machine tool machining, and has the technical scheme that: including setting up the annular fixed plate that sets up on the organism lateral wall and with the coaxial setting of axis of rotation, annular spout has been seted up on the fixed plate inner wall, it is connected with a plurality of sliders, each to slide in the spout all be equipped with the elasticity rope on the slider, the one end and the axis of rotation outer wall connection of slider are kept away from to the elasticity rope, when the long minimum of elasticity rope, the elasticity rope is in natural state, be equipped with the locating part of restriction slider position in the spout on the fixed plate.
Description
Technical Field
The invention relates to the field of machine tool machining, in particular to a rotating shaft braking device for a numerical control machine tool.
Background
With the rapid development of industrial technology, some mechanical devices equipped with rotating shafts, such as lathes, become indispensable devices for processing workpieces in factories, but for these mechanical devices of general lathes, after the processing is finished, the three-jaw chuck cannot be immediately stopped due to inertia, and the three-jaw chuck needs to be stopped by itself for subsequent processing, which wastes time.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a rotating shaft braking device for a numerical control machine tool, which has the advantage of reducing the time of the rotating shaft rotating due to inertia after the machining is finished.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an axis of rotation arresting gear for digit control machine tool is last, including setting up on the organism lateral wall and with the annular fixed plate of the coaxial setting of axis of rotation, annular spout has been seted up on the fixed plate inner wall, it is connected with a plurality of sliders, each to slide in the spout all be equipped with the elasticity rope on the slider, the one end and the axis of rotation outer wall connection of slider are kept away from to the elasticity rope, when the long minimum of elasticity rope, the elasticity rope is in natural state, be equipped with the locating part of restriction slider position in the spout on the fixed plate.
Through adopting above-mentioned technical scheme, when the lathe is when the drive axis of rotation rotates, the axis of rotation passes through the elastic cord and drives the slider and remove in the spout, and the elastic cord is had elastic restoring force by the stay cord this moment, and when the lathe stopped to add man-hour, the locating part was spacing to the position of slider in the spout, and the elastic cord provided reverse effort to the axis of rotation this moment, and then reduced the axis of rotation because the time of the rotation that inertia produced, practiced thrift process time, improvement production efficiency.
Preferably: the locating part is including opening the first drive groove that sets up on the slider lateral wall, the sliding connection is connected with first driving block in the first drive groove, first drive groove tank bottom is equipped with the first cylinder that drives first driving block and spout cell wall conflict.
Preferably: the sliding block is provided with a second driving groove on the side wall opposite to the first driving groove, a second driving block is connected in the second driving groove in a sliding mode, and a second cylinder which drives the second driving block to abut against the groove wall of the sliding groove is arranged at the bottom of the second driving groove.
Preferably: the fixed plate is detachably connected with the side wall of the machine body, a plurality of connecting plates are arranged on the outer wall of the fixed plate, and the connecting plates are fixed on the side wall of the machine body through fastening bolts.
Preferably: the machine body is characterized in that an annular groove for embedding one end of the fixing plate is formed in the side wall of the machine body, a moving groove for the connecting plate to move along the length direction of the fixing plate is formed in the outer wall of the fixing plate, and a fastener for limiting the position of the connecting plate is arranged in the moving groove.
Preferably: the fastener comprises a third air cylinder arranged on the wall of one side of the moving groove, and a piston rod of the third air cylinder is connected with the connecting plate.
Preferably: elastic rope one end can be dismantled with the slider and be connected through the first mounting that sets up on the slider, elastic rope one end can be dismantled with the axis of rotation through the second mounting that sets up on the axis of rotation outer wall and be connected.
Preferably: the first fixing piece comprises a U-shaped connecting hole formed in the sliding block, and a clamping piece for limiting the elastic rope to penetrate out of the connecting hole is arranged at one end of the elastic rope after the elastic rope penetrates through the connecting hole.
Preferably: the joint spare is including setting up the spacing post of wearing out connecting hole one end at the elasticity rope, set up the bell mouth that supplies the elasticity rope to pass in the spacing post, the less one end of bell mouth tapering is close to the slider setting, and the great end size of tapering is unanimous with elasticity rope external diameter size, spacing post includes first cardboard and second cardboard, first cardboard and second cardboard are located the both ends of elasticity rope respectively and all have seted up first card hole and second card hole towards one side of elasticity rope, and after first cardboard and second cardboard and elasticity rope contact, first card hole and second card hole form the bell mouth, first cardboard and second cardboard all are equipped with the link plate in the one side of being close to, two the link plate passes through locking bolt and connects.
Preferably: the second fixing piece comprises a threaded hole formed in the outer wall of the rotating shaft, and a threaded column in threaded connection with the threaded hole is arranged at one end, far away from the sliding block, of the elastic rope.
In conclusion, the invention has the following beneficial effects: when the machine tool drives the rotating shaft to rotate, the rotating shaft drives the sliding block to move in the sliding groove through the elastic rope, the elastic rope is pulled by the pull rope to have elastic restoring force, when the machine tool stops machining, the position of the sliding block in the sliding groove is limited by the limiting part, the elastic rope provides reverse acting force for the rotating shaft, the rotating time of the rotating shaft due to inertia is shortened, machining time is saved, and production efficiency is improved.
Drawings
FIG. 1 is a schematic structural diagram of the present embodiment;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is a schematic structural diagram of the present embodiment for embodying an annular groove;
FIG. 4 is a schematic structural diagram of a first driving block according to the present embodiment;
fig. 5 is a schematic structural diagram of the baffle plate according to the embodiment.
In the figure: 1. a body; 11. a fixing plate; 12. a chute; 121. a slider; 122. an elastic cord; 13. a first drive slot; 131. a first driving block; 132. a first cylinder; 14. a second driving groove; 141. a second driving block; 142. a second cylinder; 15. a connecting plate; 151. fastening a bolt; 152. an annular groove; 153. a moving groove; 154. a third cylinder; 16. connecting holes; 161. a first clamping plate; 162. a second clamping plate; 163. a first card hole; 164. a second card hole; 165. connecting plates; 166. locking the bolt; 17. a threaded hole; 171. a threaded post; 18. a baffle plate; 181. a fourth cylinder; 2. and rotating the shaft.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The utility model provides a rotation axis arresting gear for on digit control machine tool, as figure 1 and figure 2, including setting up on 1 lateral wall of organism and with the annular fixed plate 11 of 2 coaxial settings of axis of rotation, annular spout 12 has been seted up on the 11 inner walls of fixed plate, spout 12 internal slipping is connected with a plurality of sliders 121, all be equipped with elasticity rope 122 on each slider 121, the one end and the 2 outer wall connection of axis of rotation of slider 121 are kept away from to elasticity rope 122, when elasticity rope 122 rope length is the shortest, elasticity rope 122 is in the natural state, be equipped with the locating part of restriction slider 121 position in spout 12 on the fixed plate 11.
As shown in fig. 1 and 2, when the machine tool drives the rotating shaft 2 to rotate, the rotating shaft 2 drives the sliding block 121 to move in the sliding groove 12 through the elastic rope 122, at this time, the elastic rope 122 is pulled to have an elastic restoring force, when the machine tool stops processing, the position of the sliding block 121 in the sliding groove 12 is limited by the limiting part, at this time, the elastic rope 122 provides a reverse acting force for the rotating shaft 2, so that the rotation time of the rotating shaft 2 due to inertia is reduced, the processing time is saved, and the production efficiency is improved.
As shown in fig. 1 and fig. 2, the limiting member includes a first driving groove 13 formed in a side wall of the sliding block 121, a first driving block 131 is slidably connected in the first driving groove 13, and a first cylinder 132 for driving the first driving block 131 to abut against a groove wall of the sliding groove 12 is disposed at a bottom of the first driving groove 13. The first cylinder 132 drives the first driving block 131 to move out of the first driving groove 13, and gradually increases the friction between the first driving block 131 and the groove wall of the sliding groove 12, so that the sliding block 121 stops moving in the sliding groove 12.
As shown in fig. 2 and 4, in order to shorten the time for the slider 121 to stop moving in the sliding chute 12, the slider 121 is provided with a second driving groove 14 on a side wall opposite to the first driving groove 13, a second driving block 141 is connected in the second driving groove 14 in a sliding manner, and a second cylinder 142 for driving the second driving block 141 to abut against a groove wall of the sliding chute 12 is provided at a groove bottom of the second driving groove 14. At this time, the second cylinder 142 drives the second driving block 141 to move out of the second driving groove 14, and both opposite side walls of the sliding block 121 abut against the opposite inner walls of the sliding chute 12, so that the stopping time of the sliding block 121 is shortened.
As shown in fig. 5, or the limiting member is a baffle 18 penetrating through the fixed plate 11 and into the sliding chute 12, the baffle 18 is driven by a fourth cylinder 181 at one end extending out of the outer wall of the fixed plate 11, when the fourth cylinder 181 drives the baffle plate 18 to move into the bottom of the sliding chute 12, the sliding block 121 is convenient to move along the sliding chute 12, when the machine tool is stopped, in order to limit the movement of at least one of the slides 121 in the chute 12, therefore, the fourth cylinder 181 drives one end of the baffle plate 18 to move out of the bottom of the chute 12, at the moment, at least one slide block 121 is interfered by the baffle plate 18, and further, the movement of the at least one sliding block 121 in the sliding chute 12 is limited, at this time, the at least one sliding block 121 is limited at one side of the baffle 18, so that the rotating shaft 2 is limited by the at least one elastic rope 122, and the elastic cord 122 is gradually stretched to have a large elastic restoring force, thereby accelerating the time of the rotation shaft 2 due to inertia.
Referring to fig. 1 and 3, the fixing plate 11 is detachably connected to the side wall of the machine body 1, a plurality of connecting plates 15 are disposed on the outer wall of the fixing plate 11, and the connecting plates 15 are fixed to the side wall of the machine body 1 by fastening bolts 151. The fixing plate 11 can be mounted as required, or the fixing plate 11 can be removed when maintenance is required.
As shown in fig. 1 and 3, in order to adjust the length of the fixing plate 11 extending above the rotating shaft 2, an annular groove 152 for inserting one end of the fixing plate 11 is formed on the side wall of the machine body 1, a moving groove 153 for moving the connecting plate 15 along the length direction of the fixing plate 11 is formed on the outer wall of the fixing plate 11, and a fastening member for limiting the position of the connecting plate 15 is disposed in the moving groove 153. After one end of the fixing plate 11 enters the annular groove 152, the length of the fixing plate 11 entering the annular groove 152 is adjusted, and then the length of the fixing plate 11 extending to the upper part of the rotating shaft 2 is changed, at this time, the connecting plate 15 moves along with the fixing plate 11 in the moving groove 153, when the position of the fixing plate 11 does not need to be adjusted, the position of the connecting plate 15 is limited by the fastening piece until the connecting plate 15 is abutted against the side wall of the machine body 1, and then the fastening bolt 151 is convenient to connect with the side wall of the machine body 1.
As shown in fig. 1 and 3, the fastener includes a third cylinder 154 disposed on a wall of the groove on one side of the moving groove 153, and a piston rod of the third cylinder 154 is connected to the connection plate 15. At this time, the third cylinder 154 reciprocally drives the connecting plate 15 to move in the moving groove 153, so that the above-mentioned purpose can be achieved, and the operation is simple.
As shown in fig. 3 and 4, after a long period of use, the elasticity of the elastic cord 122 is gradually weakened, and in order to satisfy the use, the elastic cord 122 needs to be replaced, so that one end of the elastic cord 122 is detachably connected to the slider 121 through a first fixing member provided on the slider 121, and one end of the elastic cord 122 is detachably connected to the rotation shaft 2 through a second fixing member provided on the outer wall of the rotation shaft 2. The first fixing member and the second fixing member are provided to facilitate detachment of the elastic string 122 from the slider 121 and the rotation shaft 2.
As shown in fig. 3 and 4, the first fixing member includes a U-shaped connecting hole 16 formed in the slider 121, and a fastening member for limiting the elastic cord 122 from passing through the connecting hole 16 is disposed at one end of the elastic cord 122 after passing through the connecting hole 16. The clamping piece limits the elastic rope 122 from moving out of the connecting hole 16, and the installation and the disassembly are convenient.
As shown in fig. 2 and 4, the clamping member includes a limiting post disposed at one end of the elastic rope 122 penetrating through the connecting hole 16, a tapered hole for the elastic rope 122 to pass through is disposed in the limiting post, the end with smaller taper of the tapered hole is disposed near the slider 121, and the size of the end with larger taper is the same as the outer diameter of the elastic rope 122, at this time, when the elastic rope 122 is subjected to a pulling force of moving out of the connecting hole 16, the tapered hole limits the elastic rope 122 from moving out of the limiting post, and at this time, one end of the limiting post is abutted against a side surface of the slider 121 departing from the chute 12; in order to facilitate the installation of the limiting column outside the elastic rope 122, therefore, the limiting column comprises a first clamping plate 161 and a second clamping plate 162, the first clamping plate 161 and the second clamping plate 162 are respectively located at two ends of the elastic rope 122 and are provided with a first clamping hole 163 and a second clamping hole 164 on one side facing the elastic rope 122, when the first clamping plate 161 and the second clamping plate 162 are in contact with the elastic rope 122, the first clamping hole 163 and the second clamping hole 164 form a taper hole, the first clamping plate 161 and the second clamping plate 162 are provided with a connecting plate 165 on one side close to each other, and the two connecting plates 165 are connected through a locking bolt 166.
As shown in fig. 2 and 4, when installing, the first clamping plate 161 and the second clamping plate 162 are respectively placed on two sides of the elastic rope 122, at this time, the first clamping plate 161 and the second clamping plate 162 are locked by the locking bolt 166, and then the elastic rope 122 is located in the first clamping hole 163 and the second clamping hole 164, due to the installation mode of the limiting column, the length of the elastic rope 122 extending out of the connecting hole 16 can be adjusted, and then the pulling force provided by the elastic rope 122 on the rotating shaft 2 is adjusted, or the length of the elastic rope 122 penetrating out of the connecting hole 16 is adjusted when the elasticity of the elastic rope 122 is weakened, so that the elastic rope 122 is stretched and can be used, and the cost of replacing the elastic rope 122 is reduced.
As shown in fig. 3 and 4, the second fixing member includes a threaded hole 17 formed in an outer wall of the rotating shaft 2, and an end of the elastic cord 122 remote from the slider 121 is provided with a threaded post 171 threadedly coupled to the threaded hole 17. At this time, the elastic rope 122 can be fixed on the outer wall of the rotating shaft 2 only by screwing the threaded column 171 into the threaded hole 17, and the elastic force of the elastic rope 122 can be adjusted by adjusting the length of the threaded column 171 entering the threaded hole 17, so that the use requirement is met.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (10)
1. The utility model provides a axis of rotation arresting gear for on digit control machine tool which characterized in that: including setting up annular fixed plate (11) on organism (1) lateral wall and with the coaxial setting of axis of rotation (2), annular spout (12) have been seted up on fixed plate (11) inner wall, spout (12) internal slipping is connected with a plurality of sliders (121), each all be equipped with elasticity rope (122) on slider (121), the one end and axis of rotation (2) outer wall connection of slider (121) are kept away from in elasticity rope (122), when elasticity rope (122) length is minimum, elasticity rope (122) are in natural state, be equipped with the locating part of restriction slider (121) position in spout (12) on fixed plate (11).
2. The braking device for the rotating shaft used on the numerical control machine tool according to claim 1, wherein: the locating part is including opening first drive groove (13) that sets up on slider (121) lateral wall, the internal sliding of first drive groove (13) is connected with first drive block (131), first drive groove (13) tank bottom is equipped with first cylinder (132) that drive first drive block (131) and spout (12) cell wall conflict.
3. The braking device for the rotating shaft used on the numerical control machine tool according to claim 2, wherein: the sliding block (121) is provided with a second driving groove (14) on the side wall opposite to the first driving groove (13), a second driving block (141) is connected to the second driving groove (14) in a sliding mode, and a second air cylinder (142) which drives the second driving block (141) to abut against the groove wall of the sliding groove (12) is arranged at the bottom of the second driving groove (14).
4. The braking device for the rotating shaft used on the numerical control machine tool according to claim 1, wherein: the fixing plate (11) is detachably connected with the side wall of the machine body (1), a plurality of connecting plates (15) are arranged on the outer wall of the fixing plate (11), and the connecting plates (15) are fixed on the side wall of the machine body (1) through fastening bolts (151).
5. The braking device for the rotating shaft used on the numerical control machine tool according to claim 4, wherein: the machine body (1) is provided with an annular groove (152) for embedding one end of a fixing plate (11), the outer wall of the fixing plate (11) is provided with a moving groove (153) for moving a connecting plate (15) along the length direction of the fixing plate (11), and a fastener for limiting the position of the connecting plate (15) is arranged in the moving groove (153).
6. The braking device for the rotating shaft used on the numerical control machine tool according to claim 5, wherein: the fastener comprises a third air cylinder (154) arranged on the wall of one side of the moving groove (153), and a piston rod of the third air cylinder (154) is connected with the connecting plate (15).
7. The braking device for the rotating shaft used on the numerical control machine tool according to claim 1, wherein: elastic cord (122) one end can be dismantled with slider (121) and be connected through the first mounting that sets up on slider (121), elastic cord (122) one end can be dismantled with axis of rotation (2) through the second mounting that sets up on axis of rotation (2) outer wall and be connected.
8. The braking device for the rotating shaft used on the numerical control machine tool according to claim 7, wherein: the first fixing piece comprises a U-shaped connecting hole (16) formed in the sliding block (121), and a clamping piece for limiting the elastic rope (122) to penetrate out of the connecting hole (16) is arranged at one end of the elastic rope (122) after penetrating through the connecting hole (16).
9. The braking device for the rotating shaft used on the numerical control machine tool according to claim 8, wherein: the clamping piece comprises a limiting column arranged at one end, penetrating through the connecting hole (16), of the elastic rope (122), a tapered hole for the elastic rope (122) to penetrate through is formed in the limiting column, the end with the smaller taper of the tapered hole is arranged close to the sliding block (121), the size of the end with the larger taper is consistent with the size of the outer diameter of the elastic rope (122), the limiting column comprises a first clamping plate (161) and a second clamping plate (162), the first clamping plate (161) and the second clamping plate (162) are respectively arranged at two ends of the elastic rope (122), a first clamping hole (163) and a second clamping hole (164) are formed in one side facing the elastic rope (122), when the first clamping plate (161) and the second clamping plate (162) are in contact with the elastic rope (122), the first clamping hole (163) and the second clamping hole (164) form tapered holes, and a connecting plate (165) is arranged on one side, close to the first clamping plate (161) and the second clamping plate (162), the two connecting plates (165) are connected by a locking bolt (166).
10. The braking device for the rotating shaft used on the numerical control machine tool according to claim 7, wherein: the second fixing piece comprises a threaded hole (17) formed in the outer wall of the rotating shaft (2), and a threaded column (171) in threaded connection with the threaded hole (17) is arranged at one end, far away from the sliding block (121), of the elastic rope (122).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011317463.2A CN112536636B (en) | 2020-11-23 | 2020-11-23 | Rotating shaft braking device for numerical control machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011317463.2A CN112536636B (en) | 2020-11-23 | 2020-11-23 | Rotating shaft braking device for numerical control machine tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112536636A true CN112536636A (en) | 2021-03-23 |
| CN112536636B CN112536636B (en) | 2022-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011317463.2A Active CN112536636B (en) | 2020-11-23 | 2020-11-23 | Rotating shaft braking device for numerical control machine tool |
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| Country | Link |
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| CN (1) | CN112536636B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU3000589A (en) * | 1988-05-02 | 1989-11-02 | Ammco Tools, Inc. | Brake lathe |
| CN101797867A (en) * | 2010-03-23 | 2010-08-11 | 沈阳工业大学 | Planetary gear braking energy-saving wheel device |
| CN102039880A (en) * | 2009-10-10 | 2011-05-04 | 蔺峰 | Mechanical buffer type dynamic braking device |
| CN103057348A (en) * | 2013-01-18 | 2013-04-24 | 东北大学 | Spiral spring energy-storage wheel outputting energy in differential manner |
| CN107804340A (en) * | 2017-12-02 | 2018-03-16 | 西安科技大学 | A kind of Type Protection Device for Inclined Shaft Runaway Car energy-absorbing brake |
-
2020
- 2020-11-23 CN CN202011317463.2A patent/CN112536636B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU3000589A (en) * | 1988-05-02 | 1989-11-02 | Ammco Tools, Inc. | Brake lathe |
| CN102039880A (en) * | 2009-10-10 | 2011-05-04 | 蔺峰 | Mechanical buffer type dynamic braking device |
| CN101797867A (en) * | 2010-03-23 | 2010-08-11 | 沈阳工业大学 | Planetary gear braking energy-saving wheel device |
| CN103057348A (en) * | 2013-01-18 | 2013-04-24 | 东北大学 | Spiral spring energy-storage wheel outputting energy in differential manner |
| CN107804340A (en) * | 2017-12-02 | 2018-03-16 | 西安科技大学 | A kind of Type Protection Device for Inclined Shaft Runaway Car energy-absorbing brake |
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| Publication number | Publication date |
|---|---|
| CN112536636B (en) | 2022-05-03 |
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