Oil change pipe and oil pan used in conjunction with the oil change pipe

Abstract

The present application relates to an oil change pipe, and to a tank oil change technology, including an inner pipe, and an outer pipe sleeved on the inner pipe; the inner pipe and the outer pipe are rotatably connected; one end of the inner pipe is an oil inlet, and the other end of the inner pipe is an oil outlet; a liquid level control channel 1 is provided on the inner pipe; a liquid level control channel 2 used in conjunction with the liquid level control channel 1 is provided on the outer pipe; the liquid level control channel 2 is used to limit the depth of the oil in the tank; during the relative movement between the inner pipe and the outer pipe, there is a state in which the liquid level control channel 1 and the liquid level control channel 2 are aligned and connected. The tank with the oil change pipe installed does not need to be specially provided with a refueling hole or a liquid level observation hole. It only needs to provide an oil hole used in conjunction with the oil change pipe on the oil pan to realize the entire oil change process. At the same time, the oil change efficiency of the tank can be greatly improved by providing the oil change pipe.

Description

Technical Field

[0001] The present application relates to a tank oil changing technology, and in particular to an oil changing pipe and an oil pan used in conjunction with the oil changing pipe. Background Art

[0002] The oil in the gearbox, engine and other boxes on the car will become dirty and deteriorate after a certain period of use, resulting in a decrease in oil performance, increased resistance and wear, unstable pressure, and affecting the working accuracy of the hydraulic system. Therefore, these oils that have been used for a long time need to be replaced after a certain period of use.

[0003] In the related art, the process of replacing the oil in the box is generally to remove the oil drain screw on the oil pan at the bottom of the box, and then discharge the oil in the box through the oil hole at the bottom of the box. After the oil in the box is drained, seal the oil hole on the oil pan with the oil drain screw, open the oil filling hole on the top of the box, and inject oil into the box through the oil filling hole. After the oil is injected, use the oil dipstick to measure the oil depth in the box to ensure that the oil level in the box is normal.

[0004] During the manual oil change process, the staff is required to use an oil dipstick to measure the oil level in the tank, which is very inefficient. Summary of the invention

[0005] In order to improve the problem that the manual oil change method in the related art requires the use of an oil dipstick to measure the oil level in the tank, resulting in low oil change efficiency, the present application provides an oil change pipe.

[0006] One of the purposes of this application is to provide an oil change pipe, which adopts the following technical solution:

[0007] An oil change pipe comprises an inner pipe and an outer pipe sleeved on the inner pipe; the inner pipe and the outer pipe are rotatably connected;

[0008] One end of the inner tube is an oil inlet, and the other end of the inner tube is an oil outlet; a liquid level control channel 1 is provided on the inner tube;

[0009] The outer tube is provided with a liquid level control channel 2 for use with the liquid level control channel 1; the liquid level control channel 2 is used to limit the depth of the oil in the box; during the relative movement between the inner tube and the outer tube, there is a state in which the liquid level control channel 1 and the liquid level control channel 2 are aligned and connected.

[0010] By adopting the above technical solution, after the oil is filled into the box, the liquid level control channel 1 and the liquid level control channel 2 are aligned by screwing the inner tube. At this time, the oil in the box that exceeds the normal liquid level can be discharged from the box through the liquid level control channel 2 and the liquid level control channel 1.

[0011] Optionally, the inner tube is provided with a plurality of drain channels 1 for draining the oil in the box at one end away from the oil outlet; the outer tube is provided with a drain channel 2;

[0012] During the relative rotation between the inner tube and the outer tube, there is a position where the oil drain channel 1 is connected to the oil drain channel 2; and at the same time, the liquid level control channel 1 and the liquid level control channel 2 are misaligned.

[0013] By adopting the above technical solution, the oil in the box can be easily drained through the oil drain channel 1 and the oil drain channel 2.

[0014] Optionally, a positioning member is provided between the inner tube and the outer tube;

[0015] The positioning member comprises a connecting member fixedly connected to the outer tube, and the connecting member is provided with a positioning protrusion protruding toward the inner tube;

[0016] The outer surface of the inner tube is provided with a positioning groove 1;

[0017] After the positioning protrusion enters the positioning groove 1, the liquid level control channel 1 is misaligned with the liquid level control channel 2; and the oil drain channel 1 is misaligned with the oil drain channel 2.

[0018] By adopting the above technical solution, it is convenient for the staff to adjust the oil change pipe to the oil filling state and maintain the oil filling state.

[0019] Optionally, a second positioning groove is provided on the outer peripheral surface of the inner tube;

[0020] After the positioning protrusion enters the second positioning groove, the first liquid level control channel is connected with the second liquid level control channel, and the first oil discharge channel is offset from the second oil discharge channel.

[0021] By adopting the above technical solution, it is convenient for the staff to adjust the oil change pipe to the liquid level correction state and maintain the liquid level correction state.

[0022] Optionally, a positioning groove three is provided on the outer circumferential surface of the inner tube;

[0023] After the positioning protrusion enters the positioning groove three, the oil drain channel one is connected with the oil drain channel two, and the liquid level control channel one is misaligned with the liquid level control channel two.

[0024] By adopting the above technical solution, it is convenient to adjust the oil change pipe to the oil draining state and keep the oil draining state.

[0025] Optionally, a limiting member is provided between the inner tube and the outer tube for limiting the axial movement between the inner tube and the outer tube.

[0026] By adopting the above technical solution, the limiting member can limit the axial relative movement between the inner tube and the outer tube.

[0027] Optionally, the limiting member includes a connecting member fixedly connected to the outer tube, and a limiting protrusion fixedly connected to the connecting member;

[0028] A limiting groove arranged around the axis of the inner tube is provided on the outer circumferential surface of the inner tube, and the limiting protrusion is slidably connected to the limiting groove.

[0029] By adopting the above technical solution, the cooperation between the limiting protrusion and the limiting groove can limit the axial movement between the inner tube and the outer tube.

[0030] Optionally, the connecting piece is elastic.

[0031] By adopting the above technical solution, during the process of inserting the inner tube into the outer tube, the connecting piece can undergo elastic deformation, thereby facilitating the insertion of the inner tube into the outer tube.

[0032] Optionally, the outer tube includes a connecting portion and a main body portion;

[0033] The inner tube passes through the main body, and the diameter of the connecting part is larger than that of the main body.

[0034] By adopting the above technical solution, the diameter of the connecting part is larger than that of the main body, which can facilitate the screwing of the inner tube.

[0035] Optionally, an activity area is provided in the connecting portion;

[0036] The end of the inner tube where the oil inlet is located is fixedly connected to a limiting block, and the limiting block is located in the active area;

[0037] When the limit block abuts against one side of the active area, the positioning protrusion enters the first positioning groove; when the limit block abuts against the other side of the active area, the positioning protrusion enters the third positioning groove.

[0038] By adopting the above technical solution, it is convenient for the staff to adjust the oil change pipe to the oil filling state, the liquid level correction state and the oil draining state.

[0039] Optionally, the outer peripheral surface of the inner tube is provided with two sets of sealing lips, one set of sealing lips corresponds to the liquid level control channel, and the other set of sealing lips corresponds to the oil discharge channel;

[0040] Each set of sealing lips includes at least two sealing lips arranged around the axis of the inner tube, a plurality of convex edges arranged along the axis of the inner tube are provided between two adjacent sealing lips, the plurality of convex edges divide the area between the two adjacent sealing lips into a plurality of independent areas, and the first liquid level control channel and the first oil discharge channel are both located in the independent areas;

[0041] The sealing lip and the flange are both transitionally matched with the outer tube.

[0042] By adopting the above technical solution, the sealing performance between the inner tube and the outer tube is improved.

[0043] Optionally, the oil outlet of the inner tube is provided with the oil baffle plate, and a connecting rib is fixedly connected between the oil baffle plate and the inner tube.

[0044] By adopting the above technical solution, the oil baffle can prevent the oil from directly impacting the various components in the box as much as possible. In addition, after the oil is filled into the box, in the process of adjusting the liquid level in the box or in the daily use of the box, it is possible to avoid the oil on the gears in the box directly dripping from the oil outlet of the inner tube to the inner tube to affect the normal liquid level state in the box.

[0045] Optionally, a fixing mechanism is provided on the outer circumferential surface of the outer tube, and the fixing mechanism includes a clamping piece and a fixing piece.

[0046] By adopting the above technical solution, the provision of the clamping member and the fixing member can facilitate fixing the oil change pipe to the oil pan.

[0047] The second object of the present invention is to provide an oil pan, wherein an oil hole is provided at the bottom of the oil pan, a clamping seat and two elastic clamping plates are fixedly connected to the bottom wall of the oil pan, and the clamping seat is provided with a first clamping groove used in conjunction with the clamping piece; the two clamping plates are symmetrical about the oil hole, and a second clamping groove used in conjunction with the fixing piece is provided on the sides of the two clamping plates facing each other.

[0048] By adopting the above technical solution, in the process of fixing the oil change pipe to the oil pan, the connecting part of the outer pipe is clamped between the two clamping plates, so that the two fixing parts are respectively located in the two clamping grooves 2, and the clamping part is embedded in the clamping groove 1 of the clamping seat to fix the oil change pipe to the oil pan.

[0049] In summary, the present application includes at least one of the following beneficial technical effects:

[0050] 1. An oil change pipe is provided, a liquid level control channel 1 is provided on the inner pipe of the oil change pipe, and an oil change channel 2 is provided on the outer pipe of the oil change pipe. After the oil is filled into the box, the liquid level control channel 1 and the liquid level control channel 2 are aligned by screwing the inner pipe. At this time, the oil in the box that exceeds the normal liquid level can be discharged from the box through the liquid level control channel 2 and the liquid level control channel 1;

[0051] 2. By setting the oil drain channel 1 on the inner tube of the oil change pipe and setting the oil drain channel 2 on the outer tube, the oil in the box can be easily discharged;

[0052] 3. By providing an oil pan used in conjunction with the oil change pipe, it is possible to easily fix the oil change pipe to the oil pan. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 It is a schematic diagram of the structure in which the oil change pipe is installed on the oil pan in an embodiment of the present application.

[0054] Figure 2 It is a schematic diagram of the appearance structure of the inner tube and the outer tube in the embodiment of the present application.

[0055] Figure 3 It is a schematic diagram highlighting the arrangement status of the limit groove on the inner tube in the embodiment of the present application.

[0056] Figure 4 It is a schematic diagram highlighting the arrangement status of the positioning member on the outer tube in the embodiment of the present application.

[0057] Figure 5 It is a schematic diagram of the arrangement structure of positioning groove 1, positioning groove 2 and positioning groove 3 on the inner tube in the embodiment of the present application.

[0058] Figure 6 It is a schematic diagram highlighting the layout status of the liquid level control channel 1 on the inner tube in the embodiment of the present application.

[0059] Figure 7 It is a bottom view of the oil change pipe in the embodiment of the present application.

[0060] Explanation of the reference numerals: 1, inner tube; 11, oil inlet; 12, oil outlet; 13, liquid level control channel 1; 131, liquid level control hole 1; 14, oil drain channel 1; 141, oil drain hole 1; 15, limit groove; 16, positioning groove 1; 17, positioning groove 2; 18, positioning groove 3; 19, limit edge; 191, limit block; 10, screw groove; 2, outer tube; 21, connecting part; 211, limit strip; 212, active area; 22, main body; 221, liquid level control channel 2; 2211, liquid level control hole 2; 222, oil drain channel 2; 2221, oil drain hole 2; 223, layout hole; 224, installation hole; 3, limiter; 31, connector; 32, limiter protrusion; 4, positioning member; 41, elastic member; 42, positioning protrusion; 5, fixing mechanism; 51, snap-fit ​​member; 52, fixing member; 521, vertical portion; 522, horizontal portion; 6, oil pan; 61, snap-fit ​​mechanism; 611, snap-fit ​​seat; 6111, slot 1; 612, snap-fit ​​plate; 6121, slot 2; 7, sealing lip; 71, convex edge; 8, independent area; 9, oil baffle plate; 91, connecting rib. DETAILED DESCRIPTION

[0061] The following is combined with Figure 1-7 This application is described in further detail.

[0062] The present application embodiment discloses an oil change pipe. Figure 1 The oil change pipe is vertically mounted on the oil pan 6 of the box body, and the oil change pipe is aligned and connected with the oil hole on the oil pan 6. The oil change pipe in the embodiment of the present application has three states, one is the oil filling state, one is the liquid level correction state, and one is the oil draining state.

[0063] The oil filling state is the state in which the external oil pump equipment fills the oil into the box through the oil change pipe. The liquid level correction state is the state in which the oil in the box that exceeds the normal liquid level can be discharged from the box through the oil change pipe after the oil filling is completed. The emptying state is the state in which the oil in the box is emptied through the oil drain pipe.

[0064] Reference Figure 1 The oil exchange pipe comprises an inner pipe 1 and an outer pipe 2. The cross sections of the inner pipe 1 and the outer pipe 2 are both circular, and the outer pipe 2 is coaxially sleeved to the periphery of the inner pipe 1. The inner pipe 1 and the outer pipe 2 can generate relative rotation.

[0065] Reference Figure 2 The bottom end of the inner tube 1 is an oil inlet 11 , and the top end of the inner tube 1 is an oil outlet 12 .

[0066] Reference Figure 1 , the bottom end of the outer tube 2 is fixed to the oil pan 6 of the box, and the oil change pipe is connected to the oil hole on the oil pan 6. In the oil filling state, the oil is filled into the oil change pipe through the oil hole on the oil pan 6 by an oil pump device, and the oil enters the inner tube 1 through the oil inlet 11 of the inner tube 1 and is discharged into the box at the oil outlet 12. This is the oil filling state of the oil change pipe.

[0067] Next, the liquid level correction state of the oil change pipe is explained. The specific implementation structure is as follows:

[0068] Reference Figure 2 A liquid level control channel 13 is opened on the outer peripheral surface of the top area of ​​the inner tube 1.

[0069] The outer tube 2 is provided with a second liquid level control channel 221 used in conjunction with the first liquid level control channel 13. When the oil change pipe is installed in the box, the height of the second liquid level control channel 221 is the normal height of the oil in the box. During the rotation of the inner tube 1, there is a position between the inner tube 1 and the outer tube 2 where the first liquid level control channel 13 and the second liquid level control channel 221 are aligned and connected.

[0070] During the oil change process of the tank, after the oil is injected into the tank, the staff screws the inner tube 1 to make the oil change tube enter the liquid level correction state, that is, the liquid level control channel 13 and the liquid level control channel 221 are aligned and connected. At this time, if the liquid level in the tank is higher than the normal liquid level in the tank, the excess oil can be discharged from the tank through the liquid level control channel 221 and the liquid level control channel 13 in turn.

[0071] Next, the oil draining state of the oil change pipe is explained. The specific implementation structure is as follows:

[0072] Reference Figure 2 An oil drain channel 14 is provided at the bottom of the inner tube 1 , and an oil drain channel 222 used in conjunction with the oil drain channel 14 is provided at the bottom of the corresponding outer tube 2 .

[0073] During the screwing process of the inner tube 1 , there is a position where the oil drain channel 14 is aligned with the oil drain channel 222 , and when the oil drain channel 14 is aligned with the oil drain channel 222 , the liquid level control channel 1 13 is misaligned with the liquid level control channel 2 221 .

[0074] When the oil in the box needs to be drained, the inner tube 1 is screwed to align and connect the oil drain channel 1 14 with the oil drain channel 2 222. The oil in the box can enter the inner tube 1 through the oil drain channel 2 222 and the oil drain channel 1 14 in sequence, and then be discharged from the box through the oil inlet 11 at the bottom end of the inner tube 1.

[0075] Through the above description, the oil change pipe in this embodiment can realize the oil change process of the box body on the basis of only opening an oil hole on the oil pan 6 of the box body.

[0076] Reference Figure 2 Furthermore, a stopper 3 is provided between the inner tube 1 and the outer tube 2 to limit the relative movement between the inner tube 1 and the outer tube 2 along the axial direction of the oil exchange pipe. The stopper 3 can make the protrusion fixed to the inner circumference of the outer tube 2, and the corresponding outer circumference of the inner tube 1 is provided with a slide groove arranged around the axis of the inner tube 1, and the protrusion is slidably connected to the slide groove.

[0077] In this embodiment, the limiting member 3 includes a connecting member 31 fixedly connected to the outer tube 2, and a limiting protrusion 32 fixedly connected to a side of the connecting member 31 facing the inner tube 1. The connecting member 31 is elastic.

[0078] Reference Figure 3 A limiting groove 15 arranged around the axis of the inner tube 1 is opened on the outer circumferential surface of the inner tube 1, and the limiting protrusion 32 is slidably connected to the limiting groove 15.

[0079] During the process of screwing the inner tube 1 , the limiting protrusion 32 slides in the limiting groove 15 . However, the cooperation between the limiting protrusion 32 and the limiting groove 15 can avoid the relative movement between the inner tube 1 and the outer tube 2 along the axial direction of the oil exchange tube as much as possible.

[0080] During the process of inserting the inner tube 1 into the inner tube 2 , the connector 31 can undergo elastic deformation, so the connector 31 has elasticity and can more conveniently insert the inner tube 1 into the outer tube 2 .

[0081] Reference Figure 2In order to reduce the occupation of the external space by the connecting member 31. The outer tube 2 is provided with a layout hole 223 arranged around the axis of the outer tube 2, and the corresponding connecting member 31 is configured as an arc-shaped plate arranged around the axis of the outer tube 2, and one end of the connecting member 31 is fixed to the layout hole 223. The side of the connecting member 31 away from the inner tube 1 is flush with the outer surface of the outer tube 2.

[0082] Reference Figure 2 Furthermore, a positioning member 4 is provided between the inner tube 1 and the outer tube 2 for positioning the relative position between the inner tube 1 and the outer tube 2. The positioning member 4 can facilitate switching of the three states of the oil change tube.

[0083] Reference Figure 4 Specifically, the positioning member 4 includes an elastic member 41 , which is fixed to the outer tube 2 , and a positioning protrusion 42 is integrally provided on a side of the elastic member 41 facing the inner tube 1 .

[0084] The outer tube 2 is provided with a mounting hole 224 arranged around the axis of the outer tube 2, and the elastic member 41 is provided as an arc-shaped plate-shaped structure arranged around the axis of the outer tube 2, and the elastic member 41 is fixed to the outer tube 2. The side of the elastic member 41 away from the inner tube 1 is flush with the outer peripheral surface of the outer tube 2. In this way, the space occupied by the positioning member 4 can be reduced as much as possible.

[0085] Reference Figure 5 The corresponding outer surface of the inner tube 1 is provided with a positioning groove 16, a positioning groove 2 17 and a positioning groove 3 18 used in conjunction with the positioning protrusion 42.

[0086] Two groups of positioning members 4 are provided, and two groups of positioning grooves 1 16 , 17 and 18 are provided to ensure the positioning effect between the inner tube 1 and the outer tube 2 .

[0087] During the process of screwing the inner tube 1, when the positioning protrusion 42 enters the positioning groove 16, the liquid level control channel 13 and the liquid level control channel 221 are misaligned, and the oil drain channel 14 and the oil drain channel 222 are misaligned. Through the cooperation of the positioning groove 16 and the positioning protrusion 42, it is convenient for the staff to adjust the oil change pipe to the oil filling state and maintain the oil filling state. At the same time, when the positioning protrusion 42 enters the positioning groove 16, a sound will be emitted, and according to this sound, it is convenient for the staff to determine whether the oil change pipe has entered the oil filling state.

[0088] The inner tube 1 is screwed, and after the positioning protrusion 42 enters the second positioning groove 17, the liquid level control channel 13 and the second liquid level control channel 221 are aligned and connected, and the oil change pipe is kept in the liquid level correction state. At the same time, a sound is made when the positioning protrusion 42 enters the second positioning groove 17, and the staff can judge whether the oil change pipe has entered the liquid level correction state according to the sound.

[0089] Reference Figure 6 The liquid level control channel 13 includes a plurality of liquid level control holes 131, which may be one, two, or three, and are arranged at intervals around the axis of the inner tube 1. In this embodiment, two liquid level control holes 131 are arranged, and the two liquid level control holes 131 are symmetrically arranged on the inner tube 1.

[0090] Reference Figure 2 The corresponding liquid level control channel 221 includes a plurality of liquid level control holes 2211, and the plurality of liquid level control holes 131 are used in a one-to-one correspondence with the plurality of liquid level control holes 2211. By providing a plurality of liquid level control holes 131, the oil in the box can be discharged as quickly as possible.

[0091] The inner tube 1 is screwed, and after the positioning protrusion 42 enters the positioning groove 3 18, the oil drain channel 1 14 and the oil drain channel 2 222 are aligned and connected, and the oil change pipe is kept in the oil-draining state. At the same time, a sound is made during the process of the positioning protrusion 42 entering the positioning groove 3 18, and the staff can judge whether the oil change pipe has entered the oil-draining state based on this sound.

[0092] Reference Figure 2 The oil drain channel 14 includes a plurality of oil drain holes 141, which may be one, two, or three, etc. The corresponding oil drain channel 222 includes a plurality of oil drain holes 2221, which are arranged at intervals along the axial direction of the inner tube 1. The plurality of oil drain holes 141 and the plurality of oil drain holes 2221 are used in a one-to-one correspondence.

[0093] In this embodiment, two oil drain holes 141 are provided, and two corresponding oil drain holes 2221 are also provided.

[0094] Reference Figure 1 The outer tube 2 includes a connecting portion 21 and a main body 22 for use with the inner tube 1. The connecting portion 21 is located directly below the main body 22 and is used to be fixed to the oil pan 6. The inner tube 1 is inserted into the main body 22, and the top end of the inner tube 1 extends out of the main body 22. In order to facilitate the screwing of the inner tube 1, the diameter of the connecting portion 21 is larger than the main body 22.

[0095] An active area 212 is disposed in the connecting portion 21 . The active area 212 may be a groove provided in a transition area between the connecting portion 21 and the main body portion 22 .

[0096] Reference Figure 7In this embodiment, an arc-shaped limit strip 211 is arranged around the axis of the inner tube 1 in the connecting portion 21, and the active area 212 is the area formed between the two ends of the limit strip 211. The corresponding end of the inner tube 1 where the oil inlet 11 is located is fixedly connected to the limit block 191, and the limit block 191 is located in the active area 212.

[0097] The active area 212 formed at both ends of the limit strip 211 can limit the rotation range of the inner tube 1 through the limit block 191. When the limit block 191 abuts against one end of the limit strip 211, the positioning protrusion 42 enters into the positioning groove 16, and the oil change pipe enters the oil filling state. When the limit block 191 rotates to the middle position of the active area 212, the positioning protrusion 42 enters into the positioning groove 2 17, and the liquid level control channel 1 13 and the liquid level control channel 2 221 are connected, and the oil change pipe enters the liquid level correction state. When the limit block 191 abuts against the other end of the limit strip 211, the positioning protrusion 42 enters into the positioning groove 3 18, and the oil drain channel 1 14 and the oil drain channel 2 222 are connected, and the oil change pipe enters the oil draining state.

[0098] The oil inlet end of the inner tube 1 is fixedly connected with an annular limiting edge 19, the diameter of the limiting edge 19 is larger than the diameter of the connecting portion 21, and when the inner tube 1 and the outer tube 2 are installed together, the limiting edge 19 is in contact with and slidably connected to the transition portion between the connecting portion 21 and the main body 22. The limiting block 191 is fixedly connected to the limiting edge 19. The limiting edge 19 can play a limiting role in the process of installing the inner tube 1 to the outer tube 2. When the limiting edge 19 is in contact with the transition portion between the connecting portion 21 and the main body 22, the installation of the oil change pipe is completed.

[0099] Reference Figure 7 A fixing mechanism 5 is provided on the outer circumferential surface of the connecting portion 21 of the outer tube 2 . The fixing mechanism 5 is provided to facilitate fixing the outer tube 2 to the oil pan 6 .

[0100] Specifically, the fixing mechanism 5 includes a clamping member 51 and two fixing members 52. The clamping member 51 is fixedly connected to the outer peripheral surface of the connecting portion 21 of the oil change pipe, and the two fixing members 52 are symmetrically arranged on the connecting portion 21 of the oil change pipe. The fixing member 52 is fixedly connected to the outer peripheral surface of the connecting portion 21 of the oil change pipe, and the fixing member 52 includes a vertical portion 521 and a horizontal portion 522 which are perpendicular to each other, and the horizontal portion 522 is located above the vertical portion 521.

[0101] Reference Figure 1The oil pan 6 is provided with a clamping mechanism 61, which includes a clamping seat 611 and two clamping plates 612. The clamping seat 611 is fixed to the oil pan 6, and the clamping seat 611 is provided with a first clamping groove 6111 used in conjunction with the clamping member 51. The two clamping plates 612 are both fixed to the oil pan 6, and the two clamping plates 612 are symmetrical about the oil hole on the oil pan 6. The two clamping plates 612 are provided with a second clamping groove 6121 adapted to the fixing member 52 on one side facing each other, and the clamping plates 612 are elastic.

[0102] In the process of fixing the oil change pipe to the oil pan 6, the connecting portion 21 of the outer tube 2 is clamped between the two clamping plates 612, so that the two fixing parts 52 are respectively located in the two clamping grooves 6121, and the clamping part 51 is embedded in the clamping groove 6111 of the clamping seat 611 to fix the oil change pipe to the oil pan 6.

[0103] Reference Figure 2 Two groups of sealing lips 7 are provided on the outer circumference of the inner tube 1. The two groups of sealing lips 7 correspond to the liquid level control channel 13 and the oil drain channel 14 respectively. Each group of sealing lips 7 includes two annular sealing lips 7 arranged around the axis of the inner tube 1. A plurality of convex edges 71 arranged along the axial direction of the inner tube 1 are provided between the two sealing lips 7. The plurality of convex edges 71 are evenly arranged around the axis of the inner tube 1. The plurality of convex edges 71 divide the area between the two sealing lips 7 in the same group into a plurality of independent areas 8. After the inner tube 1 and the outer tube 2 are installed together, the sealing lips 7 and the convex edges 71 are transitionally matched with the outer tube 2.

[0104] The liquid level control channel 13 and the oil drain channel 14 are both located in the independent area 8.

[0105] The arrangement of the sealing lip 7 and the convex edge 71 can form a certain sealing capability between the inner tube 1 and the outer tube 2 .

[0106] Reference Figure 2 An oil baffle plate 9 is provided at the top of the inner tube 1, and the oil baffle plate 9 is fixed to the inner tube 1 through a plurality of connecting ribs 91. During the process of filling oil into the box, the oil baffle plate 9 can prevent the oil from directly impacting the various components in the box as much as possible. Another very important function is that after the oil is filled into the box, during the process of adjusting the liquid level in the box or during the daily use of the box, the oil on the gears in the box can be avoided as much as possible from dripping directly from the oil outlet of the inner tube to the inner tube and affecting the normal liquid level state in the box.

[0107] At the same time, in order to facilitate the installation of the inner tube 1 to the outer tube 2, the diameter of the top of the inner tube 1 is tapered, and the diameter of the oil baffle 9 is smaller than the inner diameter of the outer tube 2. In this way, the inner tube 1 will be smoother when passing through the outer tube 2.

[0108] Reference Figure 7A screwing groove 10 is provided at one end of the inner tube 1 where the oil inlet 11 is located. The setting of the screwing groove 10 makes it easy for people to screw the inner tube 1 using tools such as a wrench.

[0109] The implementation principle of an oil change pipe in an embodiment of the present application is as follows: when the oil in the tank needs to be replaced, the inner tube 1 is screwed until the oil drain channel 14 and the oil drain channel 222 are connected to make the oil change pipe enter the oil draining state, at this time the oil in the tank is discharged from the tank, after the oil in the tank is emptied, the inner tube 1 is screwed to make the oil change pipe enter the oil filling state, and the oil is injected into the tank through an external oil pump. After the oil filling is completed, the inner tube 1 is screwed to make the oil change pipe enter the liquid level correction state. At this time, the oil in the tank that is higher than the normal liquid level is discharged from the tank through the liquid level control channel 2 221 and the liquid level control channel 1 13, and then the inner tube 1 is screwed to make the inner tube 1 enter the oil filling state, and then the oil hole on the oil pan 6 is closed. Then start the vehicle and drive for a distance, reopen the oil hole on the oil pan 6, and screw the inner tube 1 to make the tank enter the liquid level correction state again. If there is excess oil at the normal liquid level in the tank, it will be discharged from the tank through the liquid level control channel 221 and the liquid level control channel 13. After the liquid level in the tank is normal, close the oil hole on the oil pan to complete the oil change in the tank.

[0110] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An oil change pipe, characterized in that: It comprises an inner tube (1) and an outer tube (2) sleeved on the inner tube (1); the inner tube (1) and the outer tube (2) are rotatably connected; One end of the inner tube (1) is an oil inlet (11), and the other end of the inner tube (1) is an oil outlet (12); a liquid level control channel 1 (13) is provided on the inner tube (1); The outer tube (2) is provided with a second liquid level control channel (221) for use with the first liquid level control channel (13); the second liquid level control channel (221) is used to limit the depth of the oil in the box; during the relative movement between the inner tube (1) and the outer tube (2), there is a state in which the first liquid level control channel (13) and the second liquid level control channel (221) are aligned and connected; The inner tube (1) is provided with a plurality of oil drain channels (14) at one end away from the oil outlet (12) for draining the oil in the box; the outer tube (2) is provided with oil drain channels (222); During the relative rotation between the inner tube (1) and the outer tube (2), there is a position where the oil discharge channel 1 (14) is connected to the oil discharge channel 2 (222), and the liquid level control channel 1 (13) and the liquid level control channel 2 (221) are misaligned; A positioning member (4) is provided between the inner tube (1) and the outer tube (2); The positioning member (4) comprises an elastic member (41) fixedly connected to the outer tube (2), and the elastic member (41) is provided with a positioning protrusion (42) protruding in the direction of the inner tube (1); The outer surface of the inner tube (1) is provided with a positioning groove (16); After the positioning protrusion (42) enters the positioning groove (16), the liquid level control channel (13) and the liquid level control channel (221) are misaligned; the oil discharge channel (14) and the oil discharge channel (222) are misaligned; A second positioning groove (17) is provided on the outer peripheral surface of the inner tube (1); After the positioning protrusion (42) enters the second positioning groove (17), the first liquid level control channel (13) is connected to the second liquid level control channel (221), and the first oil discharge channel (14) is misaligned with the second oil discharge channel (222); A positioning groove three (18) is provided on the outer peripheral surface of the inner tube (1); After the positioning protrusion (42) enters the positioning groove three (18), the oil discharge channel one (14) is connected with the oil discharge channel two (222), and the liquid level control channel one (13) is misaligned with the liquid level control channel two (221); A limiting member (3) is provided between the inner tube (1) and the outer tube (2) for limiting the axial movement between the inner tube (1) and the outer tube (2); The limiting member (3) comprises a connecting member (31) fixedly connected to the outer tube (2), and a limiting protrusion (32) fixedly connected to the connecting member (31); A limiting groove (15) arranged around the axis of the inner tube (1) is provided on the outer circumferential surface of the inner tube (1), and the limiting protrusion (32) is slidably connected to the limiting groove (15); The connecting piece (31) is elastic; The outer tube (2) comprises a connecting portion (21) and a main body portion (22); The inner tube (1) is passed through the main body (22), and the diameter of the connecting portion (21) is larger than that of the main body (22); An activity area (212) is provided in the connecting portion (21); The end portion of the inner tube (1) where the oil inlet (11) is located is fixedly connected to a limit block (191), and the limit block (191) is located in the active area (212); When the limit block (191) abuts against one side of the active area (212), the positioning protrusion (42) enters the first positioning groove (16); when the limit block (191) abuts against the other side of the active area (212), the positioning protrusion (42) enters the third positioning groove (18).

2. The oil change pipe according to claim 1, characterized in that: The outer peripheral surface of the inner tube (1) is provided with two groups of sealing lips (7), one group of sealing lips (7) corresponds to the liquid level control channel 1 (13), and the other group of sealing lips (7) corresponds to the oil discharge channel 1 (14); Each group of sealing lips (7) comprises at least two sealing lips (7) arranged around the axis of the inner tube (1), a plurality of convex edges (71) arranged along the axis of the inner tube (1) are provided between two adjacent sealing lips (7), the plurality of convex edges (71) divide the area between the two adjacent sealing lips (7) into a plurality of independent areas (8), and the liquid level control channel 1 (13) and the oil discharge channel 1 (14) are both located in the independent areas (8); The sealing lip (7) and the convex edge (71) are both transitionally matched with the outer tube (2).

3. The oil change pipe according to claim 1, characterized in that: An oil baffle plate (9) is provided at one end of the inner tube (1) where the oil outlet (12) is located.

4. An oil change pipe according to any one of claims 1 to 3, characterized in that: The outer peripheral surface of the outer tube (2) is provided with a fixing mechanism (5), and the fixing mechanism (5) comprises a clamping part (51) and a fixing part (52).

5. An oil pan used in conjunction with the oil change pipe according to claim 4, characterized in that: An oil hole is provided at the bottom of the oil pan (6); a clamping seat (611) and two elastic clamping plates (612) are fixedly connected to the bottom wall of the oil pan (6); a first clamping groove (6111) for use with the clamping member (51) is provided on the clamping seat (611); the two clamping plates (612) are symmetrical about the oil hole, and a second clamping groove (6121) for use with the fixing member (52) is provided on the sides of the two clamping plates (612) facing each other.

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