Filtering detection ring and oil way

Abstract

The invention relates to a filtering detection ring and an oil way, belongs to the technical field of oil detection, and solves the technical problem that an oil filter screen in the prior art cannot detect the oil pollution condition, temperature and flow at the same time. The filtering detection ring comprises a ring body, the filter plate is provided with a plurality of filter holes, a wire is arranged in the filter plate, and the filter plate is mounted in the ring body; the detection assembly is installed on the ring body and used for detecting the temperature and / or flow of the oil liquid; the battery and the control module are installed on the ring body, and the battery, the detection assembly and the wire are all electrically connected with the control module; when the wire is electrified, the filter plate and the wire form a metal monitoring assembly. The filtering detection ring has the functions of filtering, metal monitoring, temperature detection and flow detection, and is higher in practicability. The oil inlet and the oil return port of the oil way are respectively provided with one filtering detection ring, so that whether the oil in the oil way is abnormal before entering the oil way or is abnormal after entering the oil way can be conveniently judged.

Description

Technical Field

[0001] The invention belongs to the technical field of oil detection, and in particular relates to a filter detection ring and an oil circuit. Background Art

[0002] The normal operation of the equipment is inseparable from the good operation of the lubricating oil system. The lubricating oil can not only reduce the wear between the equipment parts, but also flush the grinding, sludge, carbide, etc. on the working surface of the parts through the flow of lubricating oil. Therefore, it is very important to detect the state of the lubricating oil (such as contamination, temperature, viscosity, etc.) and remind users to change the lubricating oil in time.

[0003] Of course, in order to maintain the purity of the lubricating oil in the oil circuit, a filter is usually installed in the oil circuit to filter the lubricating oil in the oil circuit. In addition, in order to facilitate the disassembly and assembly of the filter, it is usually installed in an installation frame, and the installation frame is then connected to the oil circuit.

[0004] However, the current oil filter only has the function of filtering, and it does not have the function of monitoring the oil. Therefore, in the prior art, other detection devices are usually used to detect the state of the lubricating oil in the oil circuit. Moreover, usually one type of detection device can only monitor a certain parameter of the oil (such as detecting whether it contains metal, oil temperature, and oil flow in the oil circuit, etc.). To achieve simultaneous detection of multiple parameters, it is usually necessary to configure multiple types of detection devices, which not only makes the structure more complicated, but also requires higher costs. Summary of the invention

[0005] The present invention provides a filter detection ring and an oil circuit, which are used to solve the technical problem that the oil filter in the prior art cannot detect the oil pollution status, temperature and flow rate at the same time.

[0006] The present invention is implemented by the following technical solution: a filtering detection ring, comprising:

[0007] Ring body;

[0008] A filter plate is provided with a plurality of filter holes, a conductor is arranged in the filter plate, and the filter plate is installed in the ring body;

[0009] A detection component, mounted on the ring body, the detection component is used to detect the temperature and / or flow rate of the oil flowing through the ring body;

[0010] The battery and the control module are both installed on the ring body, and the battery, the detection component and the wire are all electrically connected to the control module;

[0011] When the wire is energized, the filter plate and the wire form a metal monitoring assembly.

[0012] Furthermore, in order to better implement the present invention, a convex ring coaxial with the ring body is fixedly provided on the inner ring wall of the ring body, the control module is installed inside the convex ring, a mounting groove is opened in the convex ring, and the detection component is installed in the mounting groove.

[0013] Furthermore, in order to better implement the present invention, the detection component includes a temperature detection module and a flow detection module, the installation groove includes a plurality of gaps arranged at intervals, and the temperature detection module and the flow detection module are respectively installed in different gaps.

[0014] Furthermore, in order to better implement the present invention, the notch passes through both end surfaces of the convex ring, and a bayonet is provided on the side wall of the notch;

[0015] The temperature detection module and the flow detection module both include a main body and a clamping head arranged on the outer wall of the main body, the main body is placed in the notch, and the clamping head is clamped in the bayonet to electrically connect the main body with the control module.

[0016] Furthermore, in order to better implement the present invention, a plug is fixedly provided on one side of the filter plate, and the plug is electrically connected to the wire;

[0017] A socket is provided on the end wall of the protruding ring, and the plug is inserted into the socket to electrically connect the wire to the control module;

[0018] It also includes bolts, through which the filter plate is bolted to the raised ring.

[0019] Furthermore, in order to better implement the present invention, the convex ring is arranged at the middle position of the ring body, and a mounting position is formed between the two ends of the ring body and the convex ring respectively, and the number of the filter plates is two, and the two filter plates are respectively installed in the two mounting positions;

[0020] A plug hole is provided on both end walls of the convex ring, the plugs on the two filter plates are respectively inserted into the two plug holes, and the two filter plates are respectively bolted to the convex ring through different bolts.

[0021] Furthermore, in order to better implement the present invention, the two sockets have different shapes or sizes, and the plugs on the two filter plates correspond to the two sockets respectively.

[0022] Furthermore, in order to better implement the present invention, an indicator light is also installed on the outer wall of the ring body, the indicator light is electrically connected to the control module, and the number of the indicator lights is at least two, and the two indicator lights correspond to the two filter plates respectively;

[0023] When a certain filter plate detects the passage of metal, the control module controls the corresponding indicator light to be powered on;

[0024] When the temperature detection module detects that the oil temperature exceeds a threshold value and / or when the flow detection module detects that the oil flow rate exceeds a threshold value, the control module controls all the indicator lights to be powered on simultaneously.

[0025] Furthermore, in order to better implement the present invention, the control module is integrated with a signal sending unit and a signal receiving unit.

[0026] Furthermore, in order to better implement the present invention, a battery socket is provided on the outer side wall of the ring body, and the battery is inserted into the battery socket so that the battery is electrically connected to the control module;

[0027] A charging interface for connecting a charger is also provided on the outer side wall of the ring body to charge the battery.

[0028] The oil circuit provided by the present invention comprises an oil inlet and an oil return port, and the oil inlet and the oil return port are respectively provided with a filter detection ring as mentioned above.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] (1) The filter detection ring provided by the present invention includes a ring body, a filter plate, a detection component, a battery and a control module. The filter plate is installed inside the ring body. A plurality of filter holes are opened in the filter plate, and a wire is arranged inside the filter plate. The detection component is installed on the ring body. The detection component is used to detect the temperature and / or flow rate of the oil flowing through the ring body. The battery and the control module are both installed on the ring body. The battery, the detection component and the above-mentioned wires are all electrically connected to the control module. When the wires are energized, the filter plate and the wires constitute a metal monitoring component.

[0031] During specific use, the ring body is installed in the oil circuit. When the oil (such as lubricating oil) in the oil circuit flows to the ring body, the filter plate will filter the oil to remove impurities in the oil. The battery supplies power to the control module, and the control module supplies power to the above-mentioned wires and detection components. When the wires are energized, an electromagnetic field will be generated around them. If the oil contains metal particles, when the metal particles reach the filter plate or pass through the filter holes, the above-mentioned electromagnetic field will be disturbed, thereby causing the current in the wire to change. The control module detects the current change to determine whether the oil contains metal. At this time, the wire and filter plate constitute a metal monitoring component. At the same time, the control module also supplies power to the detection component, and the detection component measures the temperature and / or flow of the oil flowing through the ring body.

[0032] Through the above structure, the filter detection ring provided by the present invention can not only filter the oil, but also monitor whether the oil contains metal particles, and can also detect the temperature and / or flow of the oil. It has the advantages of simple structure, easy use and strong practicality.

[0033] (2) The oil circuit provided by the present invention has an oil inlet and an oil return port, and a filter detection ring as mentioned above is installed at the oil inlet and the oil return port respectively. Therefore, the oil can be detected and filtered in real time at the oil inlet and the oil return port of the oil circuit at the same time, so as to facilitate the judgment of whether the oil in the oil circuit has an abnormality before entering the oil circuit or after entering the oil circuit, and the abnormality refers to the presence of metal particles mixed in the oil or the temperature exceeds a threshold or the flow exceeds a threshold. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 is a schematic diagram of the structure of a filtering detection ring provided by an embodiment of the present invention;

[0036] Figure 2 is an exploded diagram of a filter detection ring provided by an embodiment of the present invention;

[0037] Figure 3 is a cross-sectional view of a filter detection ring provided by an embodiment of the present invention;

[0038] Figure 4 yes Figure 3 A local enlarged view of area A;

[0039] Figure 5 is a schematic structural diagram of a ring body in an embodiment of the present invention;

[0040] Figure 6 yes Figure 5 A top view of the ring body shown;

[0041] Figure 7 yes Figure 5 a bottom view of the ring body shown;

[0042] Figure 8 is a schematic structural diagram of a filter plate in an embodiment of the present invention;

[0043] Fig. 9 is a schematic structural diagram of a temperature detection module in an embodiment of the present invention;

[0044] Fig.10 Schematic diagram of the structure of the temperature detection module in the embodiment of the present invention.

[0045] In the figure:

[0046] 100-ring body, 110-convex ring, 120-notch, 130-bayonet, 140-jack, 150-battery socket, 160-charging interface, 200-filter plate, 210-wire, 220-plug, 300-temperature detection module, 400-flow detection module, 500-control module, 600-main body, 610-clip, 700-bolt, 800-indicator light. DETAILED DESCRIPTION

[0047] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0048] Embodiment 1:

[0049] like Figure 1-Figure 10 As shown, the filtering detection ring provided by the present invention includes a ring body 100, a filter plate 200, a detection component, a battery and a control module 500, wherein:

[0050] The ring body 100 is a short tube structure with a hollow interior. The filter plate 200 is installed inside the ring body 100. The ring body 100 is installed in the oil circuit. The ring body 100 is equivalent to a block in the oil circuit. The filter plate 200 is provided with a plurality of filter holes. The oil can pass through the filter holes, so that the filter plate 200 is used to filter the oil. A wire 210 is provided inside the filter plate 200. Specifically, a plurality of channels are provided inside the filter plate 200, and the wire 210 is laid in the channels.

[0051] The detection component is installed on the ring body 100, and the detection component is used to detect the temperature and / or flow rate of the oil flowing through the ring body 100. The battery and the control module 500 are both installed on the ring body 100. The battery, the detection component and the above-mentioned wire 210 are all electrically connected to the control module 500. When the wire 210 is energized, the filter plate 200 and the wire 210 form a metal monitoring component.

[0052] When used specifically, the ring body 100 is installed in the oil circuit. When the oil (such as lubricating oil) in the oil circuit flows to the ring body 100, the filter plate 200 will filter the oil to remove impurities in the oil. The battery supplies power to the control module 500, and the control module 500 supplies power to the wire 210 and the detection component. When the wire 210 is powered on, an electromagnetic field will be generated around the wire 210 and the filter plate 200. If the oil contains metal particles, when the metal particles reach the filter plate 200 or pass through the filter hole, the electromagnetic field will be disturbed, so that the current in the wire 210 changes. The control module 500 detects the current change to determine whether the oil contains metal. At this time, the wire 210 and the filter plate 200 constitute a metal monitoring component. At the same time, the control module 500 also supplies power to the detection component, and the detection component measures the temperature and / or flow rate of the oil flowing through the ring body 100. In addition, the generated electromagnetic field can make the ferromagnetic metal particles better adsorbed on the filter plate 200, thereby achieving a better filtering effect.

[0053] Through the above structure, the filter detection ring provided by the present invention can not only filter the oil, but also monitor whether the oil contains metal particles, and can also detect the temperature and / or flow of the oil. It has the advantages of simple structure, easy use and strong practicality.

[0054] Optionally, the control module 500 in this embodiment may be a circuit board or a chip.

[0055] An optional implementation of this embodiment is as follows: a convex ring 110 is integrally formed or welded on the inner ring wall of the ring body 100, the convex ring 110 is coaxially arranged with the ring body 100, the filter plate 200 is placed in the ring body 100 and connected to the convex ring 110, and the control module 500 is installed inside the convex ring 110. Specifically, a cavity is arranged inside the convex ring 110, and the control module 500 is installed in the cavity by embedding. The convex ring 110 is also provided with an installation groove, the position of the installation groove is staggered with the cavity, and the detection component is installed in the installation groove. It is easy to understand that a circuit is arranged inside the convex ring 110, so that the detection component installed in the installation groove is electrically connected to the control module 500.

[0056] In this way, the control module 500 and the detection assembly are both installed in the convex ring 110 in the ring body 100, so that the structure of the entire filter detection ring is more compact. Of course, a mounting shell can also be set on the outer ring wall of the ring body 100, and the control module 500 can be installed inside the mounting shell.

[0057] An optional implementation of this embodiment is as follows: the above-mentioned detection component includes a temperature detection module 300 and a flow detection module 400, the above-mentioned installation groove includes a plurality of gaps 120 arranged at intervals, and the above-mentioned temperature detection module 300 and flow detection module 400 are respectively installed in different gaps 120.

[0058] As the best implementation of this embodiment, the number of the above-mentioned notches 120 is two, and the temperature detection module 300 and the flow detection module 400 are respectively installed in the two notches 120. Of course, the number of the above-mentioned notches 120 can also be three or more, but the temperature detection module 300 and the flow detection module 400 are respectively installed in two of them.

[0059] Through the above structure, the filter detection ring provided in this embodiment can detect the temperature and flow rate of the oil at the same time. Furthermore, only one notch 120 can be provided. In this case, only the temperature detection module 300 or the flow detection module 400 is installed. In this case, only the temperature or flow rate can be detected.

[0060] It should be noted that the temperature detection module 300 may be a temperature sensor or a temperature detection device with a probe in the prior art, and the flow detection module 400 may be a flow sensor or a flow detection device with a probe in the prior art. Since both the temperature detection module 300 and the flow detection module 400 belong to the prior art, they will not be described in detail here.

[0061] An optional implementation of this embodiment is as follows: the notch 120 passes through the two end surfaces of the convex ring 110, and a bayonet 130 is provided on the side wall of the notch 120. The temperature detection module 300 and the flow detection module 400 both include a main body 600 and a clamp 610 provided on the outer wall of the main body 600. The main body 600 is placed in the notch 120, and the clamp 610 is clamped in the bayonet 130 to electrically connect the main body 600 with the control module 500 and to stably place the main body 600 in the notch 120. After installation, the main body 600 fills the notch 120 and constitutes a part of the convex ring 110, so that the convex ring 110 forms a complete closed loop.

[0062] Of course, the notch 120 may also be a recess opened on the surface of the convex ring 110 , and the temperature detection module 300 and the flow detection module 400 are installed in different recesses.

[0063] In addition, the above-mentioned clamping heads 610 are provided on the outer walls at both ends of the main body 600, and the above-mentioned bayonet holes 130 are opened on the two opposite side walls of the notch 120. The clamping heads 610 at both ends of the main body 600 are clamped in the bayonet holes 130 on both sides of the notch 120, so that the temperature detection module 300 and the flow detection module 400 are more firmly installed on the above-mentioned convex ring 110.

[0064] An optional implementation of this embodiment is as follows: a plug 220 is fixed on one side of the filter plate 200, and the plug 220 is electrically connected to the wire 210. A plug hole 140 is provided on the end wall of the bead 110, and the plug 220 is inserted into the plug hole 140, so as to position and limit the filter plate 200, and make the wire 210 electrically connected to the control module 500. In order to make the filter plate 200 more stably installed in the ring body 100, in this embodiment, a through hole is provided on the edge of the filter plate 200, and a screw hole is provided on the end wall of the bead 110. The bolt 700 passes through the through hole and is screwed with the screw hole, so that the filter plate 200 is pressed against the end wall of the bead 110 by the bolt 700. Moreover, the edge of one side of the filter plate 200 is in contact with the end wall fascia of the convex ring 110 . At this time, the filter plate 200 locks the temperature detection module 300 and the flow detection module 400 in the notch 120 .

[0065] In this embodiment, one filter plate 200 may be installed in the ring body 100 in the above manner, or more filter plates 200 may be installed. Optimally, two filter plates 200 are installed in the ring body 100 in the above manner. Specifically:

[0066] The convex ring 110 is arranged in the middle of the ring body 100, and a mounting position is formed between the two ends of the ring body 100 and the convex ring 110. There are two filter plates 200, and the two filter plates 200 are respectively placed in the two mounting positions; a plug hole 140 is provided on the two end walls of the convex ring 110, and the plugs 220 on the two filter plates 200 are respectively inserted into the two plug holes 140, and the two filter plates 200 are respectively bolted and fixed to the convex ring 110 by different bolts 700. In this case, the temperature detection module 300, the flow detection module 400 and the control module 500 are all located between the two filter plates 200.

[0067] In this way, the two filter plates 200 filter the oil in the ring body 100 at the same time, and the filtering effect is better. Moreover, since the oil passes through the two filter plates 200 in sequence, the two filter plates 200 can also assist in determining the flow direction of the oil. Normally, the oil in the oil circuit can only flow in one direction. The two filter plates 200 are defined as the first plate and the second plate. Under normal circumstances, the oil flows from the first plate to the second plate. If the oil flows from the second plate to the first plate, it is determined that the oil is flowing in the reverse direction.

[0068] Optionally, the filter hole diameter of the second plate may be set to be smaller than the filter hole diameter of the first plate.

[0069] In order to conveniently and accurately install the two filter plates 200 in the ring body 100, in this embodiment, the shapes or sizes of the plug holes 140 on the two end surfaces of the flange 110 are different, and the shapes and sizes of the plugs 220 on the two filter plates 200 are respectively adapted to the corresponding plug holes 140. In this way, the two filter plates 200 can be accurately installed in the correct installation position.

[0070] An optional implementation of the present embodiment is as follows: an indicator light 800 is also installed on the outer wall of the above-mentioned ring body 100, and the indicator light 800 is electrically connected to the above-mentioned control module 500, and the number of the indicator lights 800 is at least two. Specifically, the number of the indicator lights 800 corresponds to the filter plate 200. When the filter plate 200 is one piece, the indicator light 800 is one, and when the filter plate 200 is two or more pieces, the indicator lights 800 are two or more.

[0071] Since this embodiment is described by taking the installation of two filter plates 200 in the ring body 100 as an example, the number of the above-mentioned indicator lights 800 is two, and the two indicator lights 800 are respectively installed on the two end walls of the ring body 100 and correspond to the filter plates 200 on the corresponding sides.

[0072] When a filter plate 200 detects metal passing through, the control module 500 controls the corresponding indicator light 800 to be powered on and illuminated; when the temperature detection module 300 detects that the oil temperature exceeds the threshold and / or the flow detection module 400 detects that the oil flow rate exceeds the threshold, the control module 500 controls all the indicator lights 800 to be powered on and illuminated at the same time. The setting of the indicator light 800 is conducive to alerting the staff so that corresponding countermeasures can be taken as soon as possible when the oil is abnormal. It should be noted that the abnormal oil mentioned here refers to the mixing of metal particles in the oil or the temperature exceeding the threshold or the flow exceeding the threshold.

[0073] In addition, a buzzer connected to the control module 500 may be installed on the ring body 100. When the oil is abnormal, the control module 500 controls the buzzer to sound an alarm.

[0074] An optional implementation of the present embodiment is as follows: the control module 500 is also integrated with a signal sending unit and a signal receiving unit so as to send the detected oil-related information to the remote terminal in a timely manner and receive control information from the remote terminal so as to remotely control the working status of each electrical component in the ring body 100 and timely understand whether there is any abnormality in the oil.

[0075] An optional implementation of this embodiment is as follows: the battery is a rechargeable battery, and a battery socket 150 is provided on the outer wall of the ring body 100. The battery is inserted into the battery socket 150 and is electrically connected to the control module 500. A charging interface 160 for connecting a charger is also provided on the outer wall of the ring body 100. The charging interface 160 is electrically connected to the control module 500 so as to charge the battery. In this way, when the battery is out of power, it can be charged by the charger, thereby extending the service life and reducing the frequency of disassembly and assembly of the ring body 100 in the oil circuit.

[0076] Embodiment 2:

[0077] This embodiment provides an oil circuit, which has a flow channel and an oil inlet and an oil return port connected to the flow channel, wherein the oil enters the flow channel from the oil inlet and flows out of the flow channel from the oil return port. A filter detection ring is installed at each of the oil inlet and the oil return port.

[0078] In this way, the oil can be detected and filtered in real time at the oil inlet and oil return port of the oil circuit at the same time, so as to facilitate the judgment of whether the oil in the oil circuit has abnormality before or after entering the oil circuit.

[0079] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A filter detection ring, characterized in that: include: Ring body (100); A filter plate (200) is provided with a plurality of filter holes, a wire (210) is arranged inside the filter plate (200), and the filter plate (200) is installed in the ring body; A detection component, mounted on the ring body (100), the detection component being used to detect the temperature and / or flow rate of oil flowing through the ring body (100); The battery and the control module (500) are both installed on the ring body (100), and the battery, the detection component and the wire (210) are all electrically connected to the control module (500); When the wire (210) is energized, the filter plate (200) and the wire (210) form a metal monitoring component.

2. The filter detection ring according to claim 1, characterized in that: A convex ring (110) coaxial with the ring body (100) is fixedly provided on the inner ring wall of the ring body (100), the control module (500) is installed inside the convex ring (110), a mounting groove is opened on the convex ring (110), and the detection component is installed in the mounting groove.

3. The filter detection ring according to claim 2, characterized in that: The detection assembly comprises a temperature detection module (300) and a flow detection module (400); the installation slot comprises a plurality of notches (120) arranged at intervals; the temperature detection module (300) and the flow detection module (400) are respectively installed in different notches (120).

4. The filter detection ring according to claim 3, characterized in that: The notch (120) passes through both end surfaces of the convex ring (110), and a bayonet (130) is provided on the side wall of the notch (120); The temperature detection module (300) and the flow detection module (400) both comprise a main body (600) and a clamping head (610) arranged on the outer wall of the main body (600); the main body (600) is placed in the notch (120); the clamping head (610) is clamped in the bayonet (130) so that the main body (600) is electrically connected to the control module (500).

5. The filter detection ring according to any one of claims 2 to 4, characterized in that: A plug (220) is fixedly provided on one side of the filter plate (200), and the plug (220) is electrically connected to the wire (210); A plug hole (140) is provided on the end wall of the protruding ring (110), and the plug (220) is inserted into the plug hole (140) so that the wire (210) is electrically connected to the control module (500); It also includes bolts (700), and the filter plate (200) is bolted to the protruding ring (110) by the bolts (700).

6. The filter detection ring according to claim 5, characterized in that: The convex ring (110) is arranged at the middle position of the ring body (100), and a mounting position is formed between the two ends of the ring body (100) and the convex ring (110), and the number of the filter plates (200) is two, and the two filter plates (200) are respectively installed in the two mounting positions; An insertion hole (140) is provided on both end walls of the convex ring (110); the plugs (220) on the two filter plates (200) are respectively inserted into the two insertion holes (140); and the two filter plates (200) are respectively bolted to the convex ring (110) via different bolts (700).

7. The filter detection ring according to claim 6, characterized in that: An indicator light (800) is also installed on the outer side wall of the ring body (100), the indicator light (800) is electrically connected to the control module (500), and the number of the indicator lights (800) is at least two, and the two indicator lights (800) correspond to the two filter plates (200) respectively. When a certain filter plate (200) detects the passage of metal, the control module (500) controls the corresponding indicator light (800) to be powered on; When the temperature detection module (300) detects that the oil temperature exceeds a threshold value and / or when the flow detection module (400) detects that the oil flow rate exceeds a threshold value, the control module (500) controls all the indicator lights (800) to be powered on simultaneously.

8. The filter detection ring according to claim 1, characterized in that: The control module (500) is integrated with a signal sending unit and a signal receiving unit.

9. The filter detection ring according to claim 1, characterized in that: A battery socket (150) is provided on the outer side wall of the ring body (100), and the battery is inserted into the battery socket (150) so that the battery is electrically connected to the control module (500); A charging interface (160) for connecting to a charger is also provided on the outer side wall of the ring body (100) to charge the battery.

10. An oil circuit, characterized in that: The oil circuit has an oil inlet and an oil return port, and a filter detection ring as described in any one of claims 1 to 9 is installed respectively at the oil inlet and the oil return port.

Images