CN220687915U - Quantitative oiling assembly of oiling machine - Google Patents
Quantitative oiling assembly of oiling machine Download PDFInfo
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- CN220687915U CN220687915U CN202322398783.0U CN202322398783U CN220687915U CN 220687915 U CN220687915 U CN 220687915U CN 202322398783 U CN202322398783 U CN 202322398783U CN 220687915 U CN220687915 U CN 220687915U
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- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000002347 injection Methods 0.000 description 12
- 239000007924 injection Substances 0.000 description 12
- 239000006096 absorbing agent Substances 0.000 description 6
- 230000035939 shock Effects 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
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Abstract
The utility model discloses a quantitative oiling component of an oiling machine, which comprises a driving mechanism, a ball screw mechanism, an oil cylinder, a floating joint, and a fixed plate A, a movable plate and a fixed plate B which are arranged in parallel; the ball screw mechanism comprises a screw and a screw nut; one end of the floating joint is fixed on the movable plate, and the other end of the floating joint is connected with a piston rod of the oil cylinder; the driving mechanism and the oil cylinder are respectively arranged at the outer sides of the A fixing plate and the B fixing plate; one end of the screw rod is fixed on the movable plate, and the other end of the screw rod extends out of the B fixed plate and is arranged in a suspending way; the screw rod nut is matched with the B fixed plate to form a revolute pair and is in transmission connection with the output end of the driving mechanism through a transmission mechanism; the screw rod and a piston rod of the oil cylinder are coaxially arranged, and at least one guide rod is symmetrically arranged on two sides of the screw rod; two ends of the guide rod are respectively connected with the A fixing plate and the B fixing plate; the movable plate is sleeved on the guide rod and can slide relative to the guide rod. When the guide rod is in operation, the guide rod is uniformly stressed and is not easy to wear.
Description
Technical Field
The utility model relates to the technical field of oiling machines, in particular to a quantitative oiling component of an oiling machine.
Background
During the production of the shock absorber, a certain amount of shock absorber oil needs to be injected into the shock absorber. In the prior art, oil is typically injected into the oil reservoir of the shock absorber using an oil injector. Currently, in oiling machines used by various enterprises, a horizontal eccentric oiling mechanism is generally adopted as an oiling component, and the mechanism comprises a servo motor 101, an oil cylinder 3, a ball screw mechanism and two fixing plates 6 and 7 which are arranged left and right in parallel; the servo motor 101 and the oil cylinder 3 are arranged on one of the fixed plates side by side; two guide rods 9 are connected between the two fixed plates, and a movable plate 5 is sleeved on the guide rods 9; a floating joint 4 is arranged on the movable plate 5, and the floating joint 4 is connected with a piston rod of the oil cylinder 3; a screw 201 of the ball screw mechanism is connected with the output end of the servo motor 101, and a screw nut 202 is fixed on the movable plate 5 (see fig. 7); when the oil cylinder works, the servo motor drives the screw rod to rotate and drives the movable plate to move left and right back and forth, so that the piston rod of the oil cylinder is driven to stretch out and draw back, and oil absorption and oil injection functions are realized. However, in the eccentric oiling mechanism, the two guide rods are eccentrically arranged relative to the floating joint, so that when the eccentric oiling mechanism works, the guide rods are unevenly stressed and are extremely easy to wear; when the guide rod is worn, the movable plate is easy to incline when moving, so that the normal operation of the equipment is influenced, and even the screw rod is blocked; at this time, the oiling machine is required to be frequently closed, and damaged parts are maintained and replaced, so that the operation is troublesome. In addition, the eccentric oiling mechanism is not provided with a flow monitoring device, so that when the condition of inaccurate oil injection quantity occurs, the situation of which part of the oil circuit system is problematic is difficult to judge, and the inspection and maintenance are inconvenient.
Disclosure of Invention
The present application provides a quantitative oiling assembly of an oiling machine for overcoming the above-mentioned problems in the prior art. The quantitative oiling subassembly structural design of oiling machine of this application is reasonable and firm reliable, long service life, it has improved the structure of original horizontal eccentric oiling mechanism, from original by the lead screw rotation drive lead screw nut round trip movement change by the lead screw nut rotation drive lead screw round trip movement, the coaxial setting of piston rod of lead screw and hydro-cylinder moreover, the guide bar symmetrical locates the both sides of lead screw, thereby make at oil absorption and oiling in-process, lead screw centering pulling piston rod, the guide bar atress is even, be difficult for wearing and tearing, avoided the frequent start stop of oiling machine, cost of maintenance and time have been reduced.
The technical scheme of the application is as follows:
the quantitative oiling component of the oiling machine comprises a driving mechanism, a ball screw mechanism, an oil cylinder, a floating joint, a movable plate, an A fixed plate and a B fixed plate; the movable plate, the A fixed plate and the B fixed plate are arranged in parallel, and the movable plate is positioned between the A fixed plate and the B fixed plate; the ball screw mechanism comprises a screw rod and a screw rod nut sleeved on the screw rod; one end of the floating joint is fixed on the movable plate, and the other end of the floating joint is connected with a piston rod of the oil cylinder; an oil inlet and an oil outlet are formed in the oil cylinder; the driving mechanism and the oil cylinder are respectively arranged at the outer sides of the A fixing plate and the B fixing plate; one end of the screw rod is fixed on the movable plate, and the other end of the screw rod extends out of the B fixed plate and is arranged in a suspending manner; the screw rod nut is matched with the B fixed plate to form a revolute pair and is in transmission connection with the output end of the driving mechanism through a transmission mechanism; the screw rod and a piston rod of the oil cylinder are coaxially arranged, and at least one guide rod is symmetrically arranged on two sides of the screw rod; two ends of the guide rod are respectively connected with the A fixing plate and the B fixing plate; the movable plate is sleeved on the guide rod and can slide relative to the guide rod.
Compared with the prior art, the quantitative oiling component of the oiling machine adopts a vertical installation mode, has reasonable, firm and reliable structural design and long service life; the driving mechanism and the oil cylinder are arranged on two sides of the movable plate, the screw rod is fixed on the movable plate and is coaxially arranged with a piston rod of the oil cylinder, the guide rods are symmetrically arranged on two sides of the screw rod, and the screw rod nut is in transmission connection with the driving mechanism; when the oil cylinder is in operation, the driving mechanism drives the screw rod nut to rotate through the transmission mechanism, so that the screw rod moves back and forth to drive the movable plate to move back and forth, thereby driving the piston rod of the oil cylinder to stretch and retract, and realizing oil absorption and oil injection; because the lead screw is centered to pull the piston rod, the guide rods on two sides are stressed uniformly and are not easy to wear, so that the movable plate can be prevented from tilting when moving, the lead screw is blocked, the maintenance cost and the maintenance time are reduced, the oiling machine is not required to be started and stopped frequently, and the production efficiency is improved.
As optimization, in the quantitative oiling component of the oiling machine, the driving mechanism comprises a servo motor and a speed reducer; the output end of the servo motor is connected with the input end of the speed reducer; the output end of the speed reducer is in transmission connection with the screw nut.
As optimization, in the quantitative oiling assembly of the oiling machine, the transmission mechanism comprises a large gear and a small gear which are meshed with each other; the large gear is fixed on the screw nut, and the small gear is fixed on an output shaft of the speed reducer. The gear transmission mechanism is adopted to realize the transmission connection of the speed reducer and the screw rod nut, and has the advantages of small volume, convenient assembly, high transmission efficiency, stable performance and the like, is convenient to manufacture, and is beneficial to controlling the cost; in addition, in the gear transmission structure, the design of adopting a big gear and a small gear can further play a role in reducing speed, so that the piston rod of the oil cylinder can be prevented from being damaged due to too fast expansion and contraction.
As optimization, in the quantitative oiling component of the oiling machine, the screw rod nut is fixedly connected with the large gear through the fixing sleeve; the fixed sleeve comprises a sleeve body and an annular step arranged on the outer peripheral surface of the sleeve body; the lower end of the screw rod nut is inserted into the sleeve body; the sleeve body is fixedly connected with the head of the screw rod nut, and the lower side surface of the head is propped against the upper end surface of the sleeve body; the large gear is sleeved on the outer side of the sleeve body and fixedly connected with the annular ladder; the sleeve body is rotationally connected with the B fixing plate. At this time, the structure is simple and the assembly is convenient.
Further, the fixed sleeve is rotationally connected with the B fixed plate through a bearing seat; the bearing seat is fixed on the B fixed plate, a double-row angular contact bearing is embedded in the bearing seat, and the sleeve body is inserted into the double-row angular contact bearing. The double-row angular contact bearing can bear radial and axial combined loads and moment loads mainly with larger radial loads, and limit axial displacement of the two aspects of the shaft; therefore, the fixed sleeve can not move during rotation, the normal working position and rotation precision of the fixed sleeve are guaranteed, and the friction coefficient of the fixed sleeve in the rotation process can be reduced.
In the quantitative oiling component of the oiling machine, the screw rod is connected with the movable plate through the fixed ring. The fixing ring has fixing and limiting functions on the screw rod, so that the degree of freedom of the screw rod in the horizontal direction is restrained, the screw rod is prevented from rotating during working, and the normal operation of the whole oiling system is ensured.
In the quantitative oiling component of the oiling machine, two guide rods are symmetrically arranged on two sides of the screw rod. At this time, the fly leaf is equipped with a guide bar respectively on four angles, plays the guide effect to the round trip movement of fly leaf, has improved the stability when the fly leaf removes, has further avoided the fly leaf to take place the slope at the removal in-process simultaneously, has guaranteed going on smoothly of oiling work. Further, the guide rod is in sliding connection with the movable plate through a linear bearing; the linear bearing passes through the movable plate and is fixedly connected with the movable plate; the guide rod penetrates through the linear bearing, and two ends of the guide rod are respectively fixed on the A fixing plate and the B fixing plate. The linear bearing has the advantages of high precision, light weight and small friction coefficient; therefore, when the movable plate moves up and down relative to the guide rod, the friction between the linear bearing and the guide rod is small, the stable movement of the movable plate is further ensured, the linear bearing and the guide rod are not easy to wear, and the service life is long.
In the quantitative oiling assembly of the oiling machine, the speed reducer is fixed on the A fixing plate through the mounting frame. At this time, easy dismounting, be convenient for later maintenance.
As optimization, in the quantitative oiling component of the oiling machine, the oil outlet is connected with an oil outlet pipeline; and a flowmeter is arranged on the oil outlet pipeline. From this, can monitor the oiling volume through the flowmeter, guarantee that the oiling volume reaches standard, reach the effect of accurate oiling.
Drawings
FIG. 1 is a schematic structural view of a dosing assembly of an oil injector of the present application;
FIG. 2 is a schematic diagram of an assembly of the drive mechanism and ball screw mechanism of the present application;
FIG. 3 is a schematic view of an assembly of the ball screw mechanism and the stationary sleeve of the present application;
FIG. 4 is a cross-sectional view taken along A-A in FIG. 3;
FIG. 5 is a schematic view of the assembly of the bearing housing and the B-plate of the present application;
FIG. 6 is a schematic back view of FIG. 5;
fig. 7 is a schematic structural view of an eccentric oiling mechanism in the prior art.
The marks in the drawings are: 1-a driving mechanism, 101-a servo motor and 102-a speed reducer; 2-ball screw mechanism, 201-screw, 202-screw nut, 2021-head; 3-an oil cylinder; 4-floating joint; 5-a movable plate; 6-A fixed plate; 7-B fixing plates; 8-transmission mechanism, 801-large gear and 802-small gear; 9-a guide rod; 10-fixing sleeve, 1001-sleeve body and 1002-annular ladder; 11-bearing seats, 1101-mounting rings and 1102-sleeves; 12-double row angular contact bearing; 13-a fixing ring; 14-a linear bearing; 15-mounting rack; 16-baffle; 17-limiting plate.
Detailed Description
The present application is further illustrated in the following figures and examples, which are not intended to be limiting.
Referring to fig. 1 to 6, a quantitative oiling assembly of an oiling machine of the present application comprises a driving mechanism 1, a ball screw mechanism 2, an oil cylinder 3, a floating joint 4, a movable plate 5, an a fixed plate 6 and a B fixed plate 7; the driving mechanism 1 comprises a servo motor 101 and a speed reducer 102; the output end of the servo motor 101 is connected with the input end of the speed reducer 102 (the shell of the servo motor 101 is fixedly connected with the shell of the speed reducer 102 through a screw); the movable plate 5, the A fixed plate 6 and the B fixed plate 7 are arranged in parallel; the A fixed plate 6 and the B fixed plate 7 are distributed up and down, and the movable plate 5 is positioned between the A fixed plate 6 and the B fixed plate 7; the ball screw mechanism 2 comprises a screw 201 and a screw nut 202 sleeved on the screw 201; one end of the floating joint 4 is fixed on the movable plate 5, and the other end is connected with a piston rod of the oil cylinder 3; an oil inlet (the oil inlet is used for being connected with an oil storage tank) and an oil outlet (the oil outlet is used for being connected with an oil storage barrel of the shock absorber) are arranged on the oil cylinder 3; an oil outlet pipeline is connected to the oil outlet; a flowmeter is arranged on the oil outlet pipeline; the driving mechanism 1 and the oil cylinder 3 are respectively arranged on the outer sides of the A fixing plate 6 and the B fixing plate 7; one end of the screw rod 201 is fixed on the movable plate 5, and the other end extends out of the B fixed plate 7 and is arranged in a suspending manner (a fixed ring is sleeved on the extending part); the screw nut 202 is matched with the B fixed plate 7 to form a revolute pair; the screw nut 202 is in transmission connection with an output shaft of the speed reducer 102 through a transmission mechanism 8; the screw rod 201 and a piston rod of the oil cylinder 3 are coaxially arranged, and at least one guide rod 9 is symmetrically arranged on two sides of the screw rod 201; both ends of the guide rod 9 are respectively connected with the A fixing plate 6 and the B fixing plate 7; the movable plate 5 is sleeved on the guide rod 9 and can slide relative to the guide rod 9.
Examples:
in this embodiment, the transmission mechanism 8 includes a large gear 801 and a small gear 802 that are engaged with each other; the large gear 801 is fixed to the lead screw nut 202, and the small gear 802 is fixed to the output shaft of the speed reducer 102. The gear transmission mechanism is adopted to realize the transmission connection of the speed reducer 102 and the screw nut 202, so that the device has the advantages of small volume, convenience in assembly, high transmission efficiency, stable performance and the like, is convenient to manufacture, and is beneficial to controlling the cost; in addition, in the gear transmission structure, the design of adopting a large gear and a small gear can further play a role in reducing speed, so that the piston rod of the oil cylinder 3 can be prevented from being damaged due to too fast expansion and contraction.
Further, the screw nut 202 is fixedly connected with the large gear 801 through the fixing sleeve 10; the fixing sleeve 10 comprises a sleeve body 1001 and an annular step 1002 arranged on the outer peripheral surface of the sleeve body 1001; the lower end of the screw nut 202 is inserted into the sleeve 1001; the sleeve 1001 is fixed with the head 2021 of the screw nut 202 by a screw, and the lower side surface of the head 2021 abuts against the upper end surface of the sleeve 1001; the large gear 801 is sleeved on the outer side of the sleeve 1001 and is fixed with the annular step 1002 through a screw; the bearing seat 11 is arranged on the B fixed plate 7 (the bearing seat 11 is T-shaped and comprises a circular ring 1101 which is transversely arranged and a sleeve 1102 which is longitudinally arranged, the sleeve 1102 is inserted into the B fixed plate 7, the circular ring 1101 is fixed on the upper side of the B fixed plate 7 through a screw, a baffle 16 is arranged at the bottom of the sleeve 1102, and the baffle is fixed on the lower side of the B fixed plate 7 through the screw); the inside of bearing frame 11 has embedded biserial angular contact bearing 12, the cover body 1001 inserts in the biserial angular contact bearing 12, and its bottom is equipped with limiting plate 17, limiting plate 17 passes through screw connection with cover body 1001 and fixes. The double-row angular contact bearing 12 can bear radial and axial combined loads and moment loads mainly with larger radial loads, and limit axial displacement of the shaft in two aspects; therefore, the fixed sleeve 10 can not move when rotating, the normal working position and the rotating precision of the fixed sleeve are ensured, and the friction coefficient of the fixed sleeve 10 in the rotating process can be reduced.
In this embodiment, the screw 201 is connected to the movable plate 5 through the fixed ring 13; the fixed ring 13 is sleeved outside the screw rod 201 and fixed on the movable plate 5 through screws. The fixing ring 13 plays a role in fixing and limiting the screw rod 201, so that the degree of freedom of the screw rod 201 in the horizontal direction is restrained, the screw rod 201 is prevented from rotating during working, and the normal operation of the whole oiling system is ensured.
In this embodiment, two guide rods 9 are symmetrically disposed on two sides of the screw 201. At this time, the movable plate 5 is respectively provided with a guide rod 9 at four corners, which plays a guiding role in the back and forth movement of the movable plate 5, so that the stability of the movable plate 5 during movement is improved, and meanwhile, the movable plate 5 is further prevented from tilting during movement, and the smooth performance of oiling work is ensured. The guide rod 9 is in sliding connection with the movable plate 5 through a linear bearing 14; the linear bearing 14 penetrates through the movable plate 5 and is fixedly connected with the movable plate 5; the guide rod 9 passes through the linear bearing 14, and both ends are respectively fixed on the A fixing plate 6 and the B fixing plate 7 (the guide rod 9 is fixed with the A fixing plate 6 and the B fixing plate 7 through screws). The linear bearing 14 has the advantages of high precision, light weight and small friction coefficient; therefore, when the movable plate 5 moves up and down relative to the guide rod 9, the friction between the linear bearing 14 and the guide rod 9 is small, the stable movement of the movable plate 5 is further ensured, the linear bearing 14 and the guide rod 9 are not easy to wear, and the service life is long.
In this embodiment, the speed reducer 102 is fixed on the a fixing plate 6 through the mounting frame 15; the housing of the speed reducer 102 is fixed to the mounting frame 15 by screws, and the mounting frame 15 is fixed to the a fixing plate 6 by screws.
In the embodiment, the oil outlet is connected with an oil outlet pipeline; a flowmeter (not shown) is arranged on the oil outlet pipeline. From this, can monitor the oiling volume through the flowmeter, guarantee that the oiling volume reaches standard, reach the effect of accurate oiling.
The oil injection quantity of the quantitative oil injection assembly of the oil injection machine can reach 0-900 ml.
Working principle:
the servo motor 1 rotates positively, the pinion 802 is driven to rotate positively, the large gear 801 rotates and then drives the screw nut 202 to rotate synchronously, so that the screw 201 is driven to move downwards, the screw 201 moves downwards and then drives the movable plate 5 to move downwards, and accordingly a piston rod of the oil cylinder 3 is driven to extend out, and oil absorption is realized;
the servo motor 1 is reversely rotated, the pinion 802 is driven to be reversely rotated, the large gear 801 rotates and then drives the screw nut 202 to synchronously rotate, so that the screw 201 is driven to move upwards, the movable plate 5 is driven to move upwards after the screw 201 moves upwards, and the piston rod of the oil cylinder 3 is driven to shrink, so that oil injection is realized;
and repeating the circulation until the set oil injection amount is reached.
It should be noted that the quantitative oil injection assembly of the oil injection machine of the present application was developed to meet the oil injection conditions of the shock absorber, but may be used for other oil injection conditions.
The above general description of the utility model and the description of specific embodiments thereof referred to in this application should not be construed as limiting the scope of the utility model. Those skilled in the art can add, subtract or combine the features disclosed in the foregoing general description and/or the detailed description (including examples) to form other technical solutions within the scope of the present application without departing from the disclosure of the present application.
Claims (10)
1. The quantitative oiling component of the oiling machine comprises a driving mechanism (1), a ball screw mechanism (2), an oil cylinder (3), a floating joint (4), a movable plate (5), an A fixed plate (6) and a B fixed plate (7); the movable plate (5), the A fixed plate (6) and the B fixed plate (7) are arranged in parallel, and the movable plate (5) is positioned between the A fixed plate (6) and the B fixed plate (7); the ball screw mechanism (2) comprises a screw rod (201) and a screw rod nut (202) sleeved on the screw rod (201); one end of the floating joint (4) is fixed on the movable plate (5), and the other end of the floating joint is connected with a piston rod of the oil cylinder (3); an oil inlet and an oil outlet are formed in the oil cylinder (3); the method is characterized in that: the driving mechanism (1) and the oil cylinder (3) are respectively arranged at the outer sides of the A fixing plate (6) and the B fixing plate (7); one end of the screw rod (201) is fixed on the movable plate (5), and the other end of the screw rod extends out of the B fixed plate (7) and is arranged in a suspending way; the screw nut (202) is matched with the B fixed plate (7) to form a revolute pair and is in transmission connection with the driving mechanism (1) through the transmission mechanism (8); the screw rod (201) and a piston rod of the oil cylinder (3) are coaxially arranged, and at least one guide rod (9) is symmetrically arranged on two sides of the screw rod (201); two ends of the guide rod (9) are respectively connected with the A fixing plate (6) and the B fixing plate (7); the movable plate (5) is sleeved on the guide rod (9) and can slide relative to the guide rod (9).
2. The oil dosing assembly of an oil injector of claim 1, wherein: the driving mechanism (1) comprises a servo motor (101) and a speed reducer (102); the output end of the servo motor (101) is connected with the input end of the speed reducer (102); the output end of the speed reducer (102) is in transmission connection with the screw nut (202).
3. The oil dosing assembly of an oil injector of claim 2, wherein: the transmission mechanism (8) comprises a large gear (801) and a small gear (802) which are meshed with each other; the large gear (801) is fixed on the screw nut (202), and the small gear (802) is fixed on the output shaft of the speed reducer (102).
4. A dosing assembly of an oil filling machine according to claim 3, wherein: the screw nut (202) is fixedly connected with the large gear (801) through the fixing sleeve (10); the fixed sleeve (10) comprises a sleeve body (1001) and an annular step (1002) arranged on the peripheral surface of the sleeve body (1001); the lower end of the screw nut (202) is inserted into the sleeve body (1001); the sleeve body (1001) is fixedly connected with the head (2021) of the screw nut (202), and the lower side surface of the head (2021) is propped against the upper end surface of the sleeve body (1001); the large gear (801) is sleeved on the outer side of the sleeve body (1001) and is fixedly connected with the annular step (1002); the sleeve body (1001) is rotatably connected with the B fixing plate (7).
5. The oil dosing assembly of an oil injector of claim 4, wherein: the fixing sleeve (10) is connected with the B fixing plate (7) through a bearing seat (11); the bearing seat (11) is fixed on the B fixing plate (7), a double-row angular contact bearing (12) is embedded in the bearing seat (11), and the sleeve body (1001) is inserted into the double-row angular contact bearing (12).
6. The oil dosing assembly of an oil injector of claim 1, wherein: the screw rod (201) is connected with the movable plate (5) through the fixed ring (13).
7. The oil dosing assembly of an oil injector of claim 1, wherein: two guide rods (9) are symmetrically arranged on two sides of the screw rod (201).
8. The oil dosing assembly of an oil injector of claim 7, wherein: the guide rod (9) is in sliding connection with the movable plate (5) through a linear bearing (14); the linear bearing (14) penetrates through the movable plate (5) and is fixedly connected with the movable plate (5); the guide rod (9) passes through the linear bearing (14), and two ends of the guide rod are respectively fixed on the A fixing plate (6) and the B fixing plate (7).
9. The oil dosing assembly of an oil injector of claim 2, wherein: the speed reducer (102) is fixed on the A fixed plate (6) through the mounting frame (15).
10. The oil dosing assembly of an oil injector of claim 1, wherein: an oil outlet pipeline is connected to the oil outlet; and a flowmeter is arranged on the oil outlet pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322398783.0U CN220687915U (en) | 2023-09-05 | 2023-09-05 | Quantitative oiling assembly of oiling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322398783.0U CN220687915U (en) | 2023-09-05 | 2023-09-05 | Quantitative oiling assembly of oiling machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220687915U true CN220687915U (en) | 2024-03-29 |
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ID=90378211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322398783.0U Active CN220687915U (en) | 2023-09-05 | 2023-09-05 | Quantitative oiling assembly of oiling machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220687915U (en) |
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2023
- 2023-09-05 CN CN202322398783.0U patent/CN220687915U/en active Active
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