CN215525067U - Transmission mechanism telescopic protective cover for chassis dynamometer - Google Patents
Transmission mechanism telescopic protective cover for chassis dynamometer Download PDFInfo
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- CN215525067U CN215525067U CN202120626758.1U CN202120626758U CN215525067U CN 215525067 U CN215525067 U CN 215525067U CN 202120626758 U CN202120626758 U CN 202120626758U CN 215525067 U CN215525067 U CN 215525067U
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- protective cover
- telescopic protective
- fixedly connected
- screw rod
- threaded sleeve
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Abstract
The utility model discloses a telescopic protective cover of a transmission mechanism for a chassis dynamometer, which comprises an installation chassis, wherein the installation chassis is provided with a slide rail, the upper side of the slide rail is connected with a sliding plate in a sliding way, one side of the slide rail is provided with a transmission screw rod parallel to the slide rail, the transmission screw rod is sleeved with a threaded sleeve, and the threaded sleeve is fixedly connected with the lower side of the sliding plate; a telescopic protective cover is sleeved outside the transmission screw rod in an empty mode, and one end of the telescopic protective cover is detachably and fixedly connected with the threaded sleeve; one end of the telescopic protective cover, which is close to the threaded sleeve, is fixedly connected with a snap ring which is sleeved on the transmission screw rod in an empty mode, and one end of the threaded sleeve, which is close to the telescopic protective cover, is connected with a plurality of jaw mechanisms; the telescopic protective cover can better protect the transmission screw and is convenient to disassemble and assemble.
Description
Technical Field
The utility model relates to the field of automobile chassis dynamometer equipment, in particular to a telescopic protective cover of a transmission mechanism for a chassis dynamometer.
Background
The chassis dynamometer is an indoor bench test device for testing performances such as automobile dynamic property, multi-working condition emission indexes, fuel indexes and the like. The automobile chassis dynamometer simulates a road surface through a roller, calculates a road simulation equation, and simulates each working condition of an automobile by using a loading device.
The chassis dynamometer replaces a road surface with roller simulation, and various resistances encountered by the automobile in normal constant-speed running are simulated by a loading device; when the automobile accelerates and slides, the resistance borne by the automobile is simulated through the rotational inertia of the flywheel set; the torque and the power of the chassis dynamometer are measured by a force sensor arranged on a force arm connecting the stator and a dynamometer shell; the loading device applies braking torque to the rotor through the stator, and meanwhile, the stator is subjected to reaction torque of the rotor, and the torque is measured by the force sensor and converted into torque and power of the driving wheel.
When a dynamometer is used for testing, the dynamometer needs to slide relative to a chassis so as to adapt to chassis sizes of different types of automobiles, and in the prior art, a transmission screw is usually adopted for driving so that the dynamometer can slide linearly relative to the chassis; in actual conditions, the conditions of dust falling, debris accumulation and the like easily occur on the transmission screw, the transmission screw is easy to clamp due to rotation, and inconvenience is caused to test work, so that the transmission screw is protected by a telescopic protective cover.
Disclosure of Invention
The utility model aims to solve the problems in the prior art, and provides a telescopic protective cover for a transmission mechanism of a chassis dynamometer, which can better protect a transmission screw and is convenient to disassemble and assemble.
In order to achieve the purpose, the utility model adopts the technical scheme that:
a telescopic protective cover of a transmission mechanism for a chassis dynamometer comprises an installation chassis, wherein the installation chassis is provided with a slide rail, the upper side of the slide rail is connected with a sliding plate in a sliding manner, one side of the slide rail is provided with a transmission screw rod parallel to the slide rail, one end of the transmission screw rod is connected with a screw rod driving device fixedly connected with the installation chassis, the other end of the transmission screw rod is connected with a screw rod supporting device fixedly connected with the installation chassis, the transmission screw rod is sleeved with a threaded sleeve, and the threaded sleeve is fixedly connected with the lower side of the sliding plate; a telescopic protective cover is sleeved outside the transmission screw rod in an empty way, one end of the telescopic protective cover is fixedly connected with the outer shell of the screw rod driving device, and the other end of the telescopic protective cover is detachably and fixedly connected with the threaded sleeve; one end of the telescopic protective cover, which is close to the threaded sleeve, is fixedly connected with a snap ring which is sleeved on the transmission screw rod in an empty mode, one end of the threaded sleeve, which is close to the telescopic protective cover, is connected with a plurality of jaw mechanisms, and the jaw mechanisms are arranged around the transmission screw rod in a circumferential array mode; the jack catch mechanism include with thread bush fixed connection's support arm, and with the support arm rotates the movable hook of connecting, the movable hook include the straight-bar and with the knee that the straight-bar is connected, the straight-bar with be equipped with reset spring between the support arm, the knee is connected with locking mechanism.
In the scheme, the sliding plate is used for mounting the dynamometer, the transmission screw is used for driving the sliding plate 3 to slide left and right on the mounting base plate along the sliding rail, and the telescopic protective cover is used for covering the transmission screw, so that dust, sundries and the like are reduced from falling on the transmission screw, and the thread sleeve is prevented from being clamped by the dust; the telescopic protective cover is shortened and lengthened along with the left and right displacement of the threaded sleeve, so that the transmission screw can be more flexibly covered by the telescopic protective cover, and a gap cannot be generated due to the left and right displacement of the threaded sleeve on the transmission screw;
the clamping ring is arranged at one end of the telescopic protective cover, and the clamping jaw mechanism is arranged at one end of the threaded sleeve to clamp the clamping ring, so that the telescopic protective cover and the threaded sleeve can be quickly connected and detached, and the problem that the threaded sleeve is difficult to disassemble and assemble by a common mode because the threaded sleeve is arranged at the lower side of the sliding plate is solved;
when the clamping jaw mechanism is not connected with the clamping ring, the straight rod is in a horizontal state, the bent rod is arranged towards the transmission screw rod, the clamping ring abuts against the bent rod to enable the movable hook to rotate in the process of moving to the right, when the movable hook rotates for a certain angle, the locking mechanism clamps the movable hook, one side of the clamping ring is limited by the straight rod, the other side of the clamping ring is limited by the bent rod, and the clamping ring is stably connected with the clamping jaw mechanism;
when the jaw mechanism and the snap ring are required to be disassembled, the locking mechanism acts to release the movable hook, the straight rod rotates under the driving of the reset spring, and the bent rod pushes out the snap ring in the rotating process, so that the jaw mechanism and the snap ring are rapidly disassembled.
Furthermore, the locking mechanism comprises a folded plate fixedly connected with one side of the bent rod and an inserting plate connected with the folded plate, the folded plate is provided with an arc-shaped groove, the inserting plate is connected with a pin shaft connected with the arc-shaped groove, the supporting arm is provided with an inserting groove, and one side of the inserting plate is inserted into the inserting groove of the supporting arm and is in sliding connection with the inserting groove; the locking mechanism comprises a locking groove penetrating through the slot, a bolt is arranged in the locking groove, a compression spring is arranged between one end of the bolt and the locking groove, and the inserting plate is provided with an inserting hole matched with the bolt; the locking mechanism further comprises an electromagnet module arranged on one side of the locking groove, and the electromagnet module is embedded and fixed in the supporting arm.
In the scheme, the folded plate is used for connecting the bent rod and the inserting plate, and plays roles in steering and limiting; when the clamping jaw mechanism is combined with the clamping ring, the bent rod drives the inserting plate to slide in the inserting groove, when the inserting plate slides to a preset position, the inserting pin is inserted into the inserting hole of the inserting plate to limit and fix the inserting plate, and the inserting plate further limits and fixes the movable hook, so that the clamping ring is stably combined with the clamping jaw mechanism; when the clamping jaw mechanism is required to be disassembled and combined with the clamping ring, the electromagnet module is electrified, the electromagnet module attracts the bolt to overcome the pressure of the compression spring and draw out the jack, so that the limit of the inserting plate is removed, the movable hook is driven by the reset spring to rotate, and the clamping ring is pushed out by the bent rod in the rotating process, so that the clamping jaw mechanism and the clamping ring can be rapidly disassembled.
Furthermore, the support arm includes towards drive screw's radial extension's connecting rod, the activity hook with the one end of connecting rod is rotated and is connected, the one end that is close to of straight-bar the connecting rod is equipped with the gag lever post. When the claw mechanism is separated from the clamping ring, the limiting rod is mutually abutted with the connecting rod, so that the straight rod is kept in a horizontal state.
Furthermore, the telescopic protective cover comprises a plurality of support frames arranged in parallel and protective soft sleeves sleeved outside the support frames; the supporting frame comprises a pair of supporting rods vertically arranged on two sides of the transmission screw rod and an arc-shaped rod positioned above the transmission screw rod, and two ends of the arc-shaped rod are respectively connected with the upper ends of the two supporting rods; a scissor fork mechanism is connected between every two adjacent support frames; guide rails are arranged on two sides, located on the transmission screw, of the mounting base plate, and guide wheels matched with the guide rails are connected to the lower side of the supporting frame.
In the scheme, the shearing fork mechanisms are connected between every two adjacent support frames, so that the distance between every two adjacent support frames can be kept equal when the telescopic protective cover is telescopic, and the structures of the support frames and the shearing fork mechanisms are the prior art.
Furthermore, one end of the threaded sleeve, which is close to the telescopic protective cover, is provided with a radially extending folded edge, the lower side of the sliding plate is fixedly connected with a T-shaped connecting plate, and the T-shaped connecting plate is fixedly connected with one side of the folded edge through a bolt; the supporting arm is fixedly connected with the other side of the folded edge.
Furthermore, the screw supporting device comprises a supporting sleeve fixedly connected with the installation chassis, a rolling bearing is arranged in the supporting sleeve, and an inner ring of the rolling bearing is fixedly connected with the transmission screw.
Compared with the prior art, the utility model has the beneficial effects that:
1. the dynamometer is installed by the sliding plate, the sliding plate is driven to slide on the installation base plate through the transmission screw rod, the transmission screw rod is shielded by the telescopic protective cover, dust, sundries and the like are reduced from falling on the transmission screw rod, and the thread sleeve is prevented from being clamped by the dust and the sundries;
2. the telescopic protective cover is connected with the threaded sleeve, so that the telescopic protective cover is shortened and lengthened along with the left and right displacement of the threaded sleeve, the transmission screw can be more flexibly covered by the telescopic protective cover, and a gap cannot be generated due to the left and right displacement of the threaded sleeve on the transmission screw;
3. the clamping ring is arranged at one end of the telescopic protective cover, and the clamping jaw mechanism is arranged at one end of the threaded sleeve to clamp the clamping ring, so that the telescopic protective cover and the threaded sleeve can be quickly connected and detached, and the problem that the threaded sleeve is difficult to disassemble and assemble by a common mode because the threaded sleeve is arranged at the lower side of the sliding plate is solved;
drawings
FIG. 1 is a front view of a telescoping shield of a drive mechanism for a chassis dynamometer of the present invention;
FIG. 2 is a schematic view of the structure of FIG. 1 at A according to the present invention;
FIG. 3 is a schematic view of the structure of FIG. 1 at B according to the present invention;
FIG. 4 is a schematic structural view of the present invention at C of FIG. 3 (the jaw mechanism and the retaining ring are separated);
FIG. 5 is a schematic structural view of the present invention at the point C of FIG. 3 (the claw mechanism and the clamping ring are in a clamping state);
in the figure: 1. installing a chassis; 2. a slide rail; 3. a sliding plate; 4. a drive screw; 5. a threaded sleeve; 6. a screw support device; 7. a telescopic protective cover; 8. a jaw mechanism; 9. a support arm; 10. a movable hook; 11. a straight rod; 12. bending a rod; 13. a return spring; 14. a snap ring; 15. folding the plate; 16. inserting plates; 17. a bolt; 18. a jack; 19. an electromagnet module; 20. a connecting rod; 21. a limiting rod; 22. a support frame; 23. a protective soft sleeve; 24. a scissor mechanism; 25. and (4) a guide wheel.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 5, a flexible protective cover of a transmission mechanism for a chassis dynamometer includes an installation chassis 1, the installation chassis is provided with a slide rail 2, the upper side of the slide rail 2 is slidably connected with a sliding plate 3, one side of the slide rail 2 is provided with a transmission screw 4 parallel to the slide rail, one end of the transmission screw 4 is connected with a screw driving device fixedly connected with the installation chassis 1, the other end of the transmission screw 4 is connected with a screw supporting device 6 fixedly connected with the installation chassis, the transmission screw 4 is sleeved with a threaded sleeve 5, and the threaded sleeve 5 is fixedly connected with the lower side of the sliding plate 3; a telescopic protective cover 7 is sleeved outside the transmission screw rod 4 in an empty way, one end of the telescopic protective cover 7 is fixedly connected with the outer shell of the screw rod driving device, and the other end of the telescopic protective cover 7 is detachably and fixedly connected with the threaded sleeve 5; one end of the telescopic protective cover 7 close to the threaded sleeve 5 is fixedly connected with a snap ring 14 sleeved on the transmission screw rod 4 in an empty manner, one end of the threaded sleeve 5 close to the telescopic protective cover 7 is connected with a plurality of jaw mechanisms 8, and the jaw mechanisms 8 are arranged around the transmission screw rod 4 in a circumferential array manner; jaw mechanism 8 include with 5 fixed connection's of thread bush support arm 9, and with support arm 9 rotates the movable hook 10 of connecting, movable hook 10 include straight-bar 11 and with curved bar 12 that straight-bar 11 is connected, straight-bar 11 with be equipped with reset spring 13 between the support arm, curved bar 12 is connected with locking mechanism.
In the scheme, the sliding plate 3 is used for installing the dynamometer, the transmission screw 4 is used for driving the sliding plate 3 to slide left and right on the installation chassis 1 along the slide rail 2, and the telescopic protective cover 7 is used for covering the transmission screw 4, so that dust, sundries and the like are reduced from falling on the transmission screw 4, and the threaded sleeve 5 is prevented from being clamped by the dust; the telescopic protective cover 7 is shortened and lengthened along with the left and right displacement of the threaded sleeve 5, so that the telescopic protective cover 7 can more flexibly cover the transmission screw rod 4, and a gap is not generated due to the left and right displacement of the threaded sleeve 5 on the transmission screw rod 4;
the clamping ring 14 is arranged at one end of the telescopic protective cover 7, and the jaw mechanism 8 is arranged at one end of the threaded sleeve 5 to clamp the clamping ring 14, so that the telescopic protective cover 7 and the threaded sleeve 5 can be quickly connected and disconnected, and the problem that the threaded sleeve 5 is difficult to disassemble and assemble by a common mode due to the fact that the threaded sleeve 5 is arranged on the lower side of the sliding plate 3 is solved;
when the clamping jaw mechanism 8 is not connected with the clamping ring 14, the straight rod 11 is in a horizontal state, the bent rod 12 is arranged towards the transmission screw rod 4, the clamping ring 14 abuts against the bent rod 12 in the right moving process to enable the movable hook 10 to rotate, when the movable hook 10 rotates for a certain angle, the locking mechanism clamps the movable hook 10, at the moment, one side of the clamping ring 14 is limited by the straight rod 11, the other side of the clamping ring is limited by the bent rod 12, and the clamping ring 14 is stably connected with the clamping jaw mechanism 8;
when the jaw mechanism 8 and the snap ring 14 need to be detached, the locking mechanism acts to release the movable hook 10, the straight rod 11 is driven by the return spring 13 to rotate, and the bent rod 12 pushes out the snap ring 14 in the rotating process, so that the jaw mechanism 8 and the snap ring 14 are rapidly detached.
Further, the locking mechanism comprises a folded plate 15 fixedly connected with one side of the bent rod 12 and an inserting plate 16 connected with the folded plate 15, the folded plate 15 is provided with an arc-shaped groove, the inserting plate 16 is connected with a pin shaft connected with the arc-shaped groove, the supporting arm 9 is provided with an inserting groove, and one side of the inserting plate 16 is inserted into the inserting groove of the supporting arm 9 and is in sliding connection with the inserting groove; the locking mechanism comprises a locking groove penetrating through the slot, a bolt 17 is arranged in the locking groove, a compression spring is arranged between one end of the bolt 17 and the locking groove, and the inserting plate 16 is provided with an inserting hole 18 matched with the bolt 17; the locking mechanism further comprises an electromagnet module 19 arranged on one side of the locking groove, and the electromagnet module 19 is embedded and fixed in the supporting arm 9.
In the scheme, the folded plate 15 is used for connecting the bent rod 12 and the inserting plate 16 and plays roles in steering and limiting; when the clamping jaw mechanism 8 is combined with the clamping ring 14, the bent rod 12 drives the inserting plate 16 to slide in the slot, when the inserting plate 16 slides to a preset position, the inserting pin 17 is inserted into the inserting hole 18 of the inserting plate 16 to limit and fix the inserting plate 16, and the inserting plate 16 further limits and fixes the movable hook 10, so that the clamping ring 14 and the clamping jaw mechanism 8 are combined stably; when the jaw mechanism 8 and the snap ring 14 need to be disassembled and combined, the electromagnet module 19 is electrified, the electromagnet module 19 attracts the bolt 17 to draw out the jack 18 by overcoming the pressure of the compression spring, so that the limit of the inserting plate 16 is released, the movable hook 10 rotates under the driving of the return spring 13, the bent rod 12 pushes out the snap ring 14 in the rotating process, and the jaw mechanism 8 and the snap ring 14 are rapidly disassembled.
Further, the supporting arm 9 includes a connecting rod 20 extending in the radial direction of the transmission screw rod 4, the movable hook 10 is rotatably connected to one end of the connecting rod 20, and a limiting rod 21 is disposed at one end of the straight rod 11 close to the connecting rod 20. When the jaw mechanism 8 is separated from the snap ring 14, the limiting rod 21 and the connecting rod 20 are abutted against each other, so that the straight rod 11 is kept in a horizontal state.
Further, the telescopic protective cover 7 comprises a plurality of support frames 22 arranged in parallel and protective soft sleeves 23 sleeved outside the plurality of support frames 22; the supporting frame 22 comprises a pair of supporting rods vertically arranged on two sides of the transmission screw rod and an arc-shaped rod positioned above the transmission screw rod 4, and two ends of the arc-shaped rod are respectively connected with the upper ends of the two supporting rods; a scissor mechanism 24 is connected between every two adjacent support frames 22; guide rails are arranged on two sides of the mounting base plate 1, which are positioned on the transmission screw rod 4, and guide wheels 25 matched with the guide rails are connected to the lower side of the support frame 22.
In the above scheme, the scissor mechanisms 24 are connected between every two adjacent support frames 22, so that the distance between every two support frames 22 can be kept equal when the telescopic protective cover 7 is telescopic, and the structures of the support frames 22 and the scissor mechanisms 24 are the prior art.
Furthermore, one end of the threaded sleeve 5, which is close to the telescopic protective cover 7, is provided with a radially extending folded edge, a T-shaped connecting plate is fixedly connected to the lower side of the sliding plate 3, and the T-shaped connecting plate is fixedly connected with one side of the folded edge through a bolt; the supporting arm 9 is fixedly connected with the other side of the folded edge.
Further, the screw supporting device 6 comprises a supporting sleeve fixedly connected with the installation chassis 1, a rolling bearing is arranged in the supporting sleeve, and an inner ring of the rolling bearing is fixedly connected with the transmission screw 4.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A telescopic protective cover of a transmission mechanism for a chassis dynamometer is characterized by comprising an installation chassis, wherein the installation chassis is provided with a slide rail, the upper side of the slide rail is connected with a sliding plate in a sliding manner, one side of the slide rail is provided with a transmission screw rod parallel to the slide rail, one end of the transmission screw rod is connected with a screw rod driving device fixedly connected with the installation chassis, the other end of the transmission screw rod is connected with a screw rod supporting device fixedly connected with the installation chassis, the transmission screw rod is sleeved with a threaded sleeve, and the threaded sleeve is fixedly connected with the lower side of the sliding plate; a telescopic protective cover is sleeved outside the transmission screw rod in an empty way, one end of the telescopic protective cover is fixedly connected with the outer shell of the screw rod driving device, and the other end of the telescopic protective cover is detachably and fixedly connected with the threaded sleeve; one end of the telescopic protective cover, which is close to the threaded sleeve, is fixedly connected with a snap ring which is sleeved on the transmission screw rod in an empty mode, one end of the threaded sleeve, which is close to the telescopic protective cover, is connected with a plurality of jaw mechanisms, and the jaw mechanisms are arranged around the transmission screw rod in a circumferential array mode; the jack catch mechanism include with thread bush fixed connection's support arm, and with the support arm rotates the movable hook of connecting, the movable hook include the straight-bar and with the knee that the straight-bar is connected, the straight-bar with be equipped with reset spring between the support arm, the knee is connected with locking mechanism.
2. The telescopic protective cover for the transmission mechanism of the chassis dynamometer as claimed in claim 1, wherein the locking mechanism comprises a folded plate fixedly connected with one side of the bent rod and an insertion plate connected with the folded plate, the supporting arm is provided with a slot, and one side of the insertion plate is inserted into the slot of the supporting plate and is slidably connected with the slot; the locking mechanism further comprises a locking groove penetrating through the inserting groove, a bolt is arranged in the locking groove, a compression spring is arranged between one end of the bolt and the locking groove, and the inserting plate is provided with an inserting hole matched with the bolt; the locking mechanism further comprises an electromagnet module arranged on one side of the locking groove, and the electromagnet module is embedded and fixed in the supporting arm.
3. The retractable shield for a transmission mechanism of a chassis dynamometer as claimed in claim 2, wherein the folded plate has an arc-shaped slot, and the insertion plate is connected to a pin shaft connected to the arc-shaped slot.
4. The telescopic shield for a transmission mechanism of a chassis dynamometer as claimed in claim 1, wherein the supporting arm includes a connecting rod extending in a radial direction of the driving screw, the movable hook is rotatably connected to one end of the connecting rod, and a limit rod is disposed at an end of the straight rod adjacent to the connecting rod.
5. The telescopic protective cover of the transmission mechanism for the chassis dynamometer as claimed in claim 1, wherein the telescopic protective cover includes a plurality of support frames arranged side by side, and a protective soft cover sleeved outside the plurality of support frames; the support frame includes vertical locating a pair of bracing piece of drive screw both sides and being located the arc pole of drive screw's top, two are connected respectively at the both ends of arc pole the upper end of bracing piece.
6. The retractable guard of transmission mechanism for chassis dynamometer of claim 5, wherein a scissor mechanism is connected between each two adjacent supporting frames.
7. The telescopic shield for the transmission mechanism of the chassis dynamometer as claimed in claim 5, wherein guide rails are disposed on two sides of the mounting chassis on the transmission screw, and guide wheels matched with the guide rails are connected to the lower side of the supporting frame.
8. The telescopic protective cover of the transmission mechanism for the chassis dynamometer as claimed in claim 1, wherein one end of the threaded sleeve near the telescopic protective cover is provided with a radially extending folded edge, a T-shaped connecting plate is fixedly connected to the lower side of the sliding plate, and the T-shaped connecting plate is fixedly connected with one side of the folded edge through a bolt; the supporting arm is fixedly connected with the other side of the folded edge.
9. The retractable protective cover for the transmission mechanism of the chassis dynamometer as claimed in claim 1, wherein the screw supporting device includes a supporting sleeve fixedly connected to the mounting chassis, a rolling bearing is disposed in the supporting sleeve, and an inner ring of the rolling bearing is fixedly connected to the transmission screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120626758.1U CN215525067U (en) | 2021-03-26 | 2021-03-26 | Transmission mechanism telescopic protective cover for chassis dynamometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120626758.1U CN215525067U (en) | 2021-03-26 | 2021-03-26 | Transmission mechanism telescopic protective cover for chassis dynamometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215525067U true CN215525067U (en) | 2022-01-14 |
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ID=79800983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120626758.1U Active CN215525067U (en) | 2021-03-26 | 2021-03-26 | Transmission mechanism telescopic protective cover for chassis dynamometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215525067U (en) |
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2021
- 2021-03-26 CN CN202120626758.1U patent/CN215525067U/en active Active
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