Auxiliary braking device of drive-by-wire chassis

Abstract

The invention provides an auxiliary braking device of a drive-by-wire chassis, and relates to the field of auxiliary braking. A housing is included; the device further comprises a pushing assembly, the pushing assembly comprises a ball nut, the ball nut is in threaded connection with a lead screw, and a guiding part for guiding movement of the lead screw is arranged in the shell; the driving mechanism is used for driving the ball nut to rotate; the flow guide mechanism is installed on the ball nut, an oil conveying channel communicated with the flow guide mechanism is arranged in the ball nut, and the oil conveying channel is communicated with a threaded groove of an inner ring of the ball nut; the oil injection mechanism is connected with the screw rod, and the oil injection mechanism is provided with two oil outlets; the two oil outlets are respectively connected with the guide part and the flow guide mechanism. And through the arrangement of the oil injection mechanism and the flow guide mechanism, automatic lubrication can be provided for the ball nut and the guide part, and abrasion caused by long-term operation is reduced.

Description

Technical Field

[0001] The invention relates to the field of auxiliary braking, and in particular to an auxiliary braking device of a wire-controlled chassis. Background Art

[0002] Drive-by-wire chassis technology is the only way to develop high-level autonomous driving, and brake-by-wire is a key component of drive-by-wire chassis technology.

[0003] At present, the auxiliary brake of the traditional wire-controlled chassis drives the ball nut to rotate through the power mechanism, provides drive for the screw rod, and then provides push for the brake master cylinder; when the screw rod moves, it needs to be guided by the guide part, such as the existing patent document "CN112606810B A dual-motor controlled hydraulic brake with parking function", which provides guidance through the sliding between the limit block and the guide round rod. During long-term operation, the limit block and the guide round rod need to slide and rub repeatedly, which is easy to cause wear, and the ball nut and the screw rod also need to be repeatedly screwed, which is also easy to cause wear, and then lubrication is needed, but the current existing technology lacks automatic lubrication design. Summary of the invention

[0004] The present invention provides an auxiliary braking device for a wire-controlled chassis in order to solve the technical problem that a screw rod, a ball nut and a guide portion of the screw rod lack automatic lubrication.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] The present invention provides an auxiliary braking device for a wire-controlled chassis, comprising a shell; further comprising: a pushing component, the pushing component comprising a ball nut, the ball nut being threadedly connected to a screw rod, and a guide portion for guiding the movement of the screw rod being arranged in the shell; a driving mechanism, the driving mechanism being used to drive the ball nut to rotate; a flow guiding mechanism, the flow guiding mechanism being installed on the ball nut, the ball nut being provided with an oil delivery channel connected to the flow guiding mechanism, and the oil delivery channel being connected to a threaded groove of an inner ring of the ball nut; an oil filling mechanism, the oil filling mechanism being connected to the screw rod, and the oil filling mechanism being provided with two oil outlets; the two oil outlets being respectively connected to the guide portion and the flow guiding mechanism.

[0007] In the technical solution, by providing the oil injection mechanism and the flow guide mechanism, automatic lubrication can be provided for the ball nut and the guide part, thereby reducing the wear caused during long-term operation.

[0008] Preferably, the oil injection mechanism includes a telescopic bladder; a push plate is fixedly connected between one end of the telescopic bladder and one end of the screw rod, the other end of the telescopic bladder is fixedly connected to the outer wall of the shell, and the end of the telescopic bladder connected to the shell is installed with a first one-way valve and a second one-way valve, the first one-way valve is connected to an oil suction pipe, the oil suction pipe is connected to an oil storage chamber arranged at the bottom of the shell, and the second one-way valve is connected to two oil outlets.

[0009] In the technical solution, the oil injection mechanism is used to inject lubricating oil into the two oil outlets.

[0010] Preferably, the guide portion includes a guide column and a guide sleeve, the guide sleeve is connected to the screw rod, the guide sleeve is sleeved on the guide column, and the guide column is fixedly installed in the outer shell; the interior of the guide column is provided with an inner groove connected to an oil outlet of an oil filling mechanism, and a plurality of evenly distributed oil outlet holes connected to the inner groove are opened on the cylindrical surface of the guide column.

[0011] In the present technical solution, the guide part provides guidance for the movement of the screw rod, wherein the inner groove and the oil outlet hole are arranged so that the oil discharged from the oil outlet enters the inner groove and can be dispersed to the guide column from several oil outlet holes to achieve lubrication.

[0012] Preferably, an oil outlet of the oil injection mechanism is arranged above the guide mechanism; the guide mechanism includes a V-shaped groove; the number of the V-shaped grooves is several, and the several V-shaped grooves are distributed in a circular array around the ball nut, one end of the several V-shaped grooves are connected to the oil delivery channel, and the groove width of the V-shaped groove gradually increases in the direction away from the oil delivery channel; a self-sealing part is arranged between the V-shaped groove and the oil delivery channel.

[0013] In the technical solution, the flow guide mechanism receives the lubricating oil through the V-shaped groove.

[0014] Preferably, the oil delivery channel includes an annular groove opened in the ball nut, a plurality of fine holes are evenly arranged on the inner ring of the annular groove, the annular groove is connected with the threaded groove through the fine holes, a plurality of oil inlet holes are arranged in an annular shape on one side of the annular groove, and the oil inlet holes are connected to the V-shaped groove.

[0015] In this technical solution, the lubricating oil enters the oil delivery channel to provide lubrication for the thread groove.

[0016] Preferably, the self-sealing part includes an iron rod, and a retaining ring and a guide ring are fixedly installed in one end of the V-groove connected to the oil delivery channel; the iron rod and the guide ring are slidably sleeved, a sealing disk is fixedly connected to one end of the iron rod, and the sealing disk covers the retaining ring, and a fourth spring is arranged between the iron rod and the guide ring; one end of the iron rod extends out from the V-groove away from one end of the oil delivery channel.

[0017] In the technical solution, the self-sealing portion is used to control the communication between the V-shaped groove and the oil delivery channel.

[0018] Preferably, a magnetic block for magnetically attracting the iron rod is arranged above the flow guide mechanism, and the magnetic block is fixedly connected to the inner wall of the top of the shell.

[0019] In the technical solution, the self-sealing part moved into the V-shaped groove above the guide mechanism is automatically opened by the effect of magnetic attraction.

[0020] Preferably, the shell is composed of a first shell and a second shell; a plurality of connecting mechanisms are arranged between the first shell and the second shell, and the connecting mechanism includes an elastic pull rod, the elastic pull rod is connected to a push ring, the push ring is connected to a push strip, one end of the push strip is bent, and the bent end of the push strip is arranged on the rear side of the guide sleeve.

[0021] Preferably, the connecting mechanism also includes an insert tube, which is fixedly connected to the edge of one side of the first shell, and a pressure block and a pressure block are arranged in the insert tube. Inclined surfaces are arranged on one side of the pressure block and the pressure block, and the inclined surfaces of the pressure block and the pressure block are in contact with each other. A third spring is installed between the pressure block and the inner wall of one side of the insert tube, and one end of the pressure block is gap-fittingly connected with a hole body opened on the side wall of the insert tube; the pressure block is connected to the elastic pull rod.

[0022] Preferably, a plurality of insertion holes for inserting the insert tubes are provided on one edge of one side of the second shell, and a locking hole for inserting the end of the pressure block is provided on one side of the insertion holes.

[0023] In the present technical solution, a connecting mechanism is used to connect the first shell and the second shell, and the unlocking of the connecting mechanism is achieved by pushing the push strip through the guide sleeve to move the push ring, which provides convenience for the disassembly of the first shell and the second shell.

[0024] On the basis of being in accordance with the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0025] The positive and progressive effects of the present invention are:

[0026] The auxiliary brake device of the wire-controlled chassis proposed above provides an extrusion push for the oil injection mechanism when the screw rod is running and moving, so as to drive the oil injection mechanism to automatically add lubricating oil to the guide part and the guide mechanism. The lubricating oil added to the guide part provides lubrication for the guide part to reduce wear. The lubricating oil added to the guide mechanism enters the ball nut to lubricate the ball nut and the screw rod. The guide mechanism is designed with a plurality of V-grooves distributed in a circular array to receive the lubricating oil. When the ball nut rotates, the plurality of V-grooves rotate together and can receive the lubricating oil alternately in sequence, so as to ensure that the ball nut receives the lubricating oil for lubrication when it rotates. At the same time, this design has The contact-free feature avoids unnecessary friction; further, a self-sealing part is installed between the V-groove and the oil delivery channel in the ball nut, so that the connection between the V-groove and the oil delivery channel can be controlled. When the V-groove is filled with lubricating oil, it automatically opens to allow the oil to enter the oil delivery channel, and the V-groove rotates and moves to the bottom of the ball nut to automatically close to avoid the oil in the oil delivery channel from leaking out of the V-groove; wherein, the overall shell is connected to the first shell and the second shell by a plurality of connecting mechanisms, and through the design of the push ring and the push strip, when the screw rod moves to the rear side to provide a push for the push strip, the connecting mechanism can be automatically unlocked, which provides convenience for the disassembly of the first shell and the second shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0028] Figure 2 It is a schematic diagram of the structure of the interior of the shell and the interior of the fixed cylinder of the present invention.

[0029] Figure 3 For the present invention Figure 2 Schematic diagram of the structure with the A part in the middle enlarged.

[0030] Figure 4 It is a schematic diagram of the structure inside the gas cylinder of the present invention.

[0031] Figure 5 It is a schematic diagram of the structure inside the first shell of the present invention.

[0032] Figure 6 It is a structural schematic diagram of one side of the first shell of the present invention.

[0033] Figure 7 For the present invention Figure 6 Schematic diagram of the structure with the B part enlarged.

[0034] Figure 8 It is a schematic diagram of the connection structure between the first shell and the second shell of the present invention.

[0035] Fig. 9 For the present invention Figure 8Schematic diagram of the structure enlarged in the middle C part.

[0036] Fig.10 It is a structural schematic diagram of the oil injection mechanism of the present invention.

[0037] Fig.11 It is a schematic diagram of the distribution structure of the V-shaped grooves of the present invention.

[0038] Fig.12 For the present invention Fig.11 Schematic diagram of the structure with the D part enlarged.

[0039] Fig.13 It is a schematic diagram of the cross-sectional structure of the top side of the ball nut of the present invention.

[0040] Description of Reference Numerals

[0041] 1. Shell; 101. First shell; 102. Second shell; 1021. Insertion hole; 1022. Lock hole;

[0042] 2. Driving mechanism; 201. Motor; 202. First gear; 203. Second gear;

[0043] 3. Oil cylinder assembly; 301. Fixed cylinder; 302. First piston; 303. First spring; 304. Push rod;

[0044] 4. Pushing assembly; 401. Ball nut; 4011. Oil inlet hole; 4012. Annular groove; 4013. Fine hole; 4014. Threaded groove; 402. Screw rod; 403. Guide column; 4031. Inner groove; 4032. Oil outlet hole; 404. Connecting frame; 405. Guide sleeve; 406. End frame; 4061. Stopper;

[0045] 5. Oil filling mechanism; 501. Telescopic soft bag; 502. First one-way valve; 503. Oil suction pipe; 504. Second one-way valve; 505. Oil outlet pipe; 5051. Connecting pipe;

[0046] 6. Push the plate;

[0047] 7. Push ring; 701. Push strip;

[0048] 8. Sealing mechanism; 801. Inflatable sealing ring; 802. Air cylinder; 803. Air pipe; 804. Second piston; 805. Connecting rod;

[0049] 9. Connecting mechanism; 901. Insertion cylinder; 902. Pressure block; 903. Rod body; 904. Movable block; 905. Second spring; 906. Slide groove; 907. Pressure block; 908. Third spring;

[0050] 10. Partition;

[0051] 11. flow guide mechanism; 1101. fixed plate; 1102. spacer; 1103. iron rod; 1104. V-shaped groove; 1105. fourth spring; 1106. guide ring; 1107. sealing plate; 1108. retaining ring;

[0052] 12. Magnet. DETAILED DESCRIPTION

[0053] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0054] like Figure 1-Figure 13 As shown, the auxiliary braking device of the wire-controlled chassis includes a housing 1; and further includes:

[0055] A pushing assembly 4, wherein the pushing assembly 4 comprises a ball nut 401, wherein the ball nut 401 is threadedly connected with a screw rod 402, and a guide portion for guiding the movement of the screw rod 402 is provided in the housing 1;

[0056] A driving mechanism 2, wherein the driving mechanism 2 is used to drive the ball nut 401 to rotate;

[0057] A flow guide mechanism 11, wherein the flow guide mechanism 11 is mounted on the ball nut 401, wherein the ball nut 401 is provided with an oil delivery channel connected to the flow guide mechanism 11, and the oil delivery channel is connected to the thread groove 4014 of the inner ring of the ball nut 401;

[0058] The oil injection mechanism 5 is connected to the screw rod 402 and is provided with two oil outlets; the two oil outlets are respectively connected to the guide part and the flow guide mechanism 11.

[0059] like Figure 2 As shown, in a specific implementation, the ball nut 401 is rotationally connected to the wall of the first shell 101; the driving mechanism 2 includes a motor 201; the motor 201 is fixedly mounted on the outer wall of the first shell 101, and a first gear 202 is fixedly mounted on the output shaft end of the motor 201, and the first gear 202 is meshingly connected to the second gear 203, the first gear 202 and the second gear 203 are both arranged in the first shell 101, and the second gear 203 is fixedly sleeved on the ball nut 401.

[0060] The driving mechanism 2 is used to drive the ball nut 401 to rotate; specifically, the motor 201 drives the first gear 202 to rotate, and the meshing transmission of the first gear 202 and the second gear 203 causes the ball nut 401 to rotate.

[0061] like Figure 5As shown, as a specific technical solution, a partition 10 is fixedly installed in the first shell 101, and an oil storage cavity is formed between the partition 10 and the inner wall of the first shell 101, and lubricating oil is stored in the oil storage cavity.

[0062] The oil storage chamber provides oil for the oil filling mechanism 5 . The bottom of the second gear 203 is immersed in the oil storage chamber. When the second gear 203 rotates, lubricating oil will adhere to the bottom circumference of the second gear 203 to provide lubrication between the second gear 203 and the first gear 202 .

[0063] like Fig.10 As shown, the oil injection mechanism 5 includes a telescopic soft bag 501; a push plate 6 is fixedly connected between one end of the telescopic soft bag 501 and one end of the screw rod 402, and the other end of the telescopic soft bag 501 is fixedly connected to the outer wall of the first shell 101 of the housing 1, and the end of the telescopic soft bag 501 connected to the housing 1 is installed with a first check valve 502 and a second check valve 504, the first check valve 502 is connected to an oil suction pipe 503, and the oil suction pipe 503 is connected to the oil storage cavity set at the bottom of the housing 1, and the second check valve 504 is connected to two oil outlets. Among them, the oil injection mechanism 5 also includes an oil outlet pipe 505, one end of the oil outlet pipe 505 is connected to the second check valve 504, and a connecting pipe 5051 is fixedly connected and arranged on the pipe wall of the oil outlet pipe 505, and one end of the connecting pipe 5051 away from the oil outlet pipe 505 and one end of the oil outlet pipe 505 away from the second check valve 504 serve as two oil outlets.

[0064] When the ball nut 401 is driven to rotate, the ball nut 401 drives the screw rod 402. Under the guidance of the guide part, the screw rod 402 moves linearly to provide auxiliary thrust for the cylinder assembly 3, that is, the screw rod 402 moves to the front side. The screw rod 402 squeezes the telescopic bag 501 through the push plate 6 to shrink the telescopic bag 501. The lubricating oil in the telescopic bag 501 enters the oil outlet pipe 505 and the connecting pipe 5051 through the second one-way valve 504, and then flows out from the two oil outlets.

[0065] When the screw rod 402 is reset, the screw rod 402 drives the telescopic soft bag 501 to reset through the push plate 6, and its volume is restored. The lubricating oil in the oil storage chamber is sucked out through the oil suction pipe 503, and then enters the telescopic soft bag 501 through the first one-way valve 502, so as to replenish the lubricating oil liquid for the telescopic soft bag 501 for the next lubrication.

[0066] The telescopic soft bag 501 adopts a corrugated shape to achieve telescopic requirements.

[0067] like Figure 5 , Figure 6 as well as Figure 8As shown, as a specific technical solution, the guide portion includes a guide column 403 and a guide sleeve 405, the guide sleeve 405 is connected to the screw rod 402, the guide sleeve 405 is sleeved on the guide column 403, and the guide column 403 is fixedly installed in the shell 1; the guide sleeve 405 is arranged on the connecting frame 404, and the guide sleeve 405 and the connecting frame 404 are fixedly connected as a whole, and the connecting frame 404 is fixedly connected to the end of the screw rod 402 away from the push plate 6; the end of the guide column 403 is fixedly connected to the end frame 406, and the end frame 406 is fixedly connected to the inner wall of the first shell 101; the interior of the guide column 403 is provided with an inner groove 4031 connected to an oil outlet of the oil filling mechanism 5, and a plurality of oil outlet holes 4032 evenly distributed and connected to the inner groove 4031 are opened on the cylindrical surface of the guide column 403.

[0068] Among them, the guide column 403 is arranged parallel to the screw rod 402; when the screw rod 402 moves, it slides along the length direction of the guide column 403 through the guide sleeve 405 to provide a guiding effect; in order to reduce the sliding friction between the guide sleeve 405 and the guide column 403, the oil filling mechanism 5 injects lubricating oil into the inner groove 4031 through the oil outlet, and the lubricating oil in the inner groove 4031 is discharged through a plurality of oil outlet holes 4032 and evenly distributed on the guide column 403 to achieve lubrication between the guide column 403 and the guide sleeve 405.

[0069] like Figure 2 As shown, the cylinder assembly 3 is installed on the second shell 102; the cylinder assembly 3 includes a fixed cylinder 301; the fixed cylinder 301 is fixedly connected to the front outer wall of the second shell 102, and two first pistons 302 are installed in the fixed cylinder 301. The fixed cylinder 301 is divided into two oil chambers by the two pistons, and a first spring 303 is arranged in each of the two oil chambers. The second piston 804 close to the side of the second shell 102 is fixedly connected to a push rod 304, and a through hole is opened on the second shell 102, and the push rod 304 passes through the through hole, and the end of the push rod 304 contacts with the connecting frame 404; the two oil chambers are connected and an interface is arranged.

[0070] The braking of the wire-controlled chassis is achieved by applying pressure to the first piston 302 to reduce the volume of the oil chamber, and the oil in the oil chamber enters the brake of the wheel through the interface to brake.

[0071] In the above, the screw rod 402 moves linearly toward the front side, pushes the push rod 304 through the connecting frame 404, and pushes the first piston 302 to move through the push rod 304, which plays a role of auxiliary braking. At the same time, during braking, the volume of the oil chamber decreases, and the first spring 303 produces compression deformation to cancel the braking. When the screw rod 402 is reset, the compression elastic force of the first spring 303 provides a push to reset the screw rod 402.

[0072] like Figure 6 and Fig.11As shown, as a specific technical solution, an oil outlet of the oil filling mechanism 5 is arranged above the guide mechanism 11; the guide mechanism 11 includes a V-shaped groove 1104; the number of the V-shaped grooves 1104 is several, and the several V-shaped grooves 1104 are distributed in a circular array around the ball nut 401, one end of the several V-shaped grooves 1104 are connected to the oil delivery channel, and the groove width of the V-shaped groove 1104 gradually increases in the direction away from the oil delivery channel; a self-sealing portion is arranged between the V-shaped groove 1104 and the oil delivery channel.

[0073] In a specific implementation, the flow guide mechanism 11 further includes a fixed disk 1101 and a spacer 1102. The number of the fixed disks 1101 is two, and the two fixed disks 1101 are fixedly sleeved on the ball nut 401. The two fixed disks 1101 are specifically located between the second gear 203 and the inner wall of the first housing 101. A plurality of spacers 1102 distributed in a ring array are fixedly installed in the interval between the two fixed disks 1101, such as Fig.11 As shown, a plurality of V-shaped grooves 1104 are formed by separation by spacers 1102 .

[0074] When the ball nut 401 rotates, the guide mechanism 11 as a whole rotates with the ball nut 401, so that a plurality of V-shaped grooves 1104 pass under an oil outlet of the oil filling mechanism 5 in sequence to receive the discharged oil in sequence; it should be noted that the self-sealing part has a self-opening and closing setting, and after a V-shaped groove 1104 moves to the bottom of the oil outlet, the self-sealing part thereon will automatically open, and automatically close after leaving.

[0075] Through the above design, oil supply to the oil delivery channel is achieved when the ball nut 401 rotates; and the self-sealing part is automatically opened when the V-groove 1104 is used to receive lubricating oil, allowing the oil to enter the oil delivery channel; when the oil is not received, it is automatically closed, and after the V-groove 1104 rotates and moves to a position below the ball nut 401, the oil in the oil delivery channel is prevented from flowing out of the V-groove 1104 due to gravity.

[0076] like Fig.13 As shown, the oil delivery channel includes an annular groove 4012 opened into the ball nut 401, and a plurality of fine holes 4013 are evenly arranged on the inner ring of the annular groove 4012. The annular groove 4012 is connected to the threaded groove 4014 through the fine holes 4013. A plurality of oil inlet holes 4011 are arranged in an annular shape on one side of the annular groove 4012, and the oil inlet holes 4011 are connected to the V-shaped groove 1104.

[0077] The lubricating oil in the V-shaped groove 1104 can enter the annular groove 4012 through the oil inlet hole 4011 , and then enter the threaded groove 4014 from the oil inlet hole 4011 to provide lubrication between the ball nut 401 and the screw rod 402 .

[0078] like Fig.11 and Fig.12 As shown, the self-sealing part includes an iron rod 1103, and a retaining ring 1108 and a guide ring 1106 are fixedly installed in one end of the V-shaped groove 1104 connected to the oil delivery channel; the iron rod 1103 and the guide ring 1106 are slidingly sleeved, and a sealing disk 1107 is fixedly connected to one end of the iron rod 1103, and the sealing disk 1107 covers the retaining ring 1108, and a fourth spring 1105 is arranged between the iron rod 1103 and the guide ring 1106; one end of the iron rod 1103 extends out from the V-shaped groove 1104 away from one end of the oil delivery channel.

[0079] It should be noted that if Fig.12 As shown, only the left and right sides of the guide ring 1106 are fixedly connected to the inner wall of one end of the V-groove 1104, and there is a gap between the front and rear sides of the guide ring 1106 and the wall of the V-groove 1104, and the gap is used for the passage of oil in the V-groove 1104 without obstruction; the front, back, left and right sides of the retaining ring 1108 are fixedly connected to the wall of the V-groove 1104, that is, there is no gap between the outer ring of the retaining ring 1108 and the wall of the V-groove 1104; and the sealing plate 1107 covers the retaining ring 1108, which can cover and block the inner ring of the retaining ring 1108, and there is a gap around the sealing plate 1107 and the wall of the V-groove 1104; through the above definition, the sealing plate 1107 blocks and covers the retaining ring 1108, which can disconnect the connection between the V-groove 1104 and the oil delivery channel, and the sealing plate 1107 is separated from the retaining ring 1108, so that the V-groove 1104 and the oil delivery channel are connected.

[0080] The fourth spring 1105 is specifically sleeved on the iron rod 1103 , and two ends of the fourth spring 1105 are fixedly connected to the iron rod 1103 and the guide ring 1106 respectively.

[0081] A magnetic block 12 for magnetically attracting the iron rod 1103 is disposed above the flow guide mechanism 11 , and the magnetic block 12 is fixedly connected to the top inner wall of the first shell 101 of the housing 1 .

[0082] The magnetic block 12 is magnetic. When a V-groove 1104 moves to the bottom of the magnetic block 12, the iron rod 1103 in the V-groove 1104 is magnetically attracted by the magnetic block 12, and the iron rod 1103 drives the sealing disk 1107 to move and stretches the fourth spring 1105. The sealing disk 1107 is separated from the retaining ring 1108, so that the V-groove 1104 is connected to the oil delivery channel. The V-groove 1104 is located below an oil outlet of the oil filling mechanism 5 to receive the oil. After the V-groove 1104 leaves, the iron rod 1103 loses its magnetic attraction, and the elastic force of the fourth spring 1105 is used to reset the iron rod 1103, so that the sealing disk 1107 re-seals the retaining ring 1108. Through the above design, the self-sealing part can control the connection between the V-groove 1104 and the oil delivery channel.

[0083] It should be noted that the magnetic block 12 adopts an arc-shaped structure, and the iron rod 1103 performs a circular motion. After moving to the position of the magnetic block 12, the distance between the top of the iron rod 1103 and the magnetic block 12 is greater than the distance between the closing disk 1107 and the guide ring 1106, so that the iron rod 1103 is magnetically attracted to the magnetic block 12, and the closing disk 1107 moves and contacts the guide ring 1106, which is blocked. There is no contact between the iron rod 1103 and the magnetic block 12, thereby avoiding friction between the iron rod 1103 and the magnetic block 12 when it moves.

[0084] like Figure 5 and Figure 8 As shown, the housing 1 is composed of a first shell 101 and a second shell 102; a plurality of connecting mechanisms 9 are arranged between the first shell 101 and the second shell 102, and the connecting mechanism 9 includes an elastic pull rod, the elastic pull rod is connected to a push ring 7, the push ring 7 is connected to a push strip 701, one end of the push strip 701 is bent, and the bent end of the push strip 701 is arranged on the rear side of the guide sleeve 405.

[0085] like Figure 8 In the state shown, the screw rod 402 is in the initial position, and no thrust is provided to the oil cylinder assembly 3, and no braking is performed. In this state, there is a certain distance between the rear side of the guide sleeve 405 and the end frame 406, and the stopper 4061 is fixedly installed on the end frame 406. When the screw rod 402 moves forward to provide thrust to the oil cylinder assembly 3 and perform auxiliary braking, the bent portion of the push strip 701 only contacts the rear side of the guide sleeve 405, and the push strip 701 does not move; and the screw rod 402 is reset to the initial state and continues to move backward, and the guide sleeve 405 can push the push strip 701 to move until the bent portion of the push strip 701 contacts the stopper 4061 and is blocked.

[0086] During normal operation, after the screw rod 402 moves to the initial position, it will not move further and will not push the push bar 701; however, when the connection between the first shell 101 and the second shell 102 is released, disassembly is performed, and maintenance and inspection of the interior of the shell 1 is performed, the screw rod 402 will continue to move backward, pushing the push bar 701 through the guide sleeve 405, and the push bar 701 drives the push ring 7 to move, and the push ring 7 provides unlocking for all connecting mechanisms 9, thereby automatically releasing the connection lock.

[0087] like Figure 7-Figure 9As shown, as a specific technical solution, the connecting mechanism 9 also includes an insert sleeve 901, and the insert sleeve 901 is fixedly connected to the edge of one side of the first shell 101. A pressure block 902 and a pressure block 907 are arranged in the insert sleeve 901. One side of the pressure block 902 and the pressure block 907 are both provided with inclined surfaces, and the inclined surfaces of the pressure block 902 and the pressure block 907 are in contact with each other. A third spring 908 is installed between the pressure block 907 and the inner wall of one side of the insert sleeve 901, and one end of the pressure block 907 is connected with a hole body provided on the side wall of the insert sleeve 901 in a clearance fit; the pressure block 902 is connected to the elastic pull rod.

[0088] The elastic pull rod includes a movable block 904, which is fixedly connected to the outer ring of the push ring 7. A sliding groove 906 is provided on the first shell 101. The movable block 904 is slidably connected to the sliding groove 906. The movable block 904 is fixedly connected to a rod body 903. The rod body 903 is fixedly connected to the pressure block 902. A second spring 905 is provided in the sliding groove 906, and the movable block 904 is connected to the second spring 905.

[0089] A plurality of insertion holes 1021 for inserting the insert tube 901 are provided on one side edge of the second shell 102 , and a locking hole 1022 for inserting the end of the pressure block 907 is provided on one side of the insertion hole 1021 .

[0090] When the push strip 701 moves backward, the push strip 701 drives the push ring 7 to move backward, and the push ring 7 drives the movable block 904 in the multiple connecting mechanisms 9 to move to compress the second spring 905. At the same time, the movable block 904 drives the pressure block 902 to move through the rod body 903. Fig. 9 As shown, the third spring 908 is in a compressed state, and when the pressure block 902 moves backward, the elastic force of the third spring 908 keeps the pressure block 907 always in contact with the pressure block 902, so that the end of the pressure block 907 is pulled out of the lock hole 1022 to release the lock; after releasing the lock, the hand hooks the push plate 6 to perform manual limiting to prevent the screw rod 402 from resetting and moving, and then the first shell 101 and the second shell 102 can be manually separated; the above design makes it easy to disassemble the first shell 101 and the second shell 102.

[0091] After the internal maintenance of the housing 1, when the first housing 101 and the second housing 102 are connected, the screw rod 402 is moved to the above position, the pressure block 907 is received in the insert sleeve 901, the insert sleeve 901 is plugged into the socket 1021, the edge of the first housing 101 and the edge of the second housing 102 are fitted together, the manual limit on the screw rod 402 is cancelled, and then the compressive elastic force of the second spring 905 is used to push the movable block 904, the movable block 904 drives the push ring 7, and the push ring 7 pushes the guide sleeve 405 through the push strip 701, so that the guide sleeve 405 and the screw rod 402 are reset and restored to the state as shown in the figure. Figure 8In the above state, the rod body 903 moves with the movable block 904, the rod body 903 drives the pressure block 902 to move, and the pressure block 902 pushes the pressure block 907, so that the end of the pressure block 907 is inserted into the lock hole 1022, thereby completing the locking.

[0092] like Figure 2-Figure 4 As shown, it also includes a sealing mechanism 8, a groove is opened on the edge of the first shell 101, an inflatable sealing ring 801 is arranged in the groove, the inflatable sealing ring 801 is connected to the air cylinder 802 through the air pipe 803, and the air cylinder 802 is fixedly installed on the inner wall of the first shell 101, and a second piston 804 is connected in the air cylinder 802, and the second piston 804 is fixedly connected to the push ring 7 through the connecting rod 805.

[0093] When the first shell 101 and the second shell 102 are connected, the push ring 7 moves to the front side, and the push ring 7 drives the second piston 804 to move through the connecting rod 805, injecting the gas in the gas cylinder 802 into the air pipe 803 and into the inflatable sealing ring 801, so that the inflatable sealing ring 801 expands, which is used to ensure the sealing of the connection between the first shell 101 and the second shell 102.

[0094] The present invention is not limited to the above-mentioned embodiments. Any changes in shape or structure are within the protection scope of the present invention. The protection scope of the present invention is defined by the attached claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications are within the protection scope of the present invention.

Claims

1. An auxiliary braking device for a wire-controlled chassis, comprising a housing (1); characterized in that: Also includes: A pushing assembly (4), the pushing assembly (4) comprising a ball nut (401), the ball nut (401) being threadedly connected to a screw rod (402), and a guide portion for guiding the movement of the screw rod (402) being provided in the housing (1); A driving mechanism (2), the driving mechanism (2) being used to drive the ball nut (401) to rotate; a flow guiding mechanism (11), the flow guiding mechanism (11) being mounted on the ball nut (401), the ball nut (401) being provided with an oil delivery channel connected to the flow guiding mechanism (11), and the oil delivery channel being connected to the thread groove (4014) of the inner ring of the ball nut (401); An oil injection mechanism (5), the oil injection mechanism (5) is connected to the screw rod (402), and the oil injection mechanism (5) is provided with two oil outlets; the two oil outlets are respectively connected to the guide portion and the flow guide mechanism (11).

2. The auxiliary braking device of the wire-controlled chassis according to claim 1, characterized in that: The oil injection mechanism (5) comprises a telescopic bladder (501); a push plate (6) is fixedly connected between one end of the telescopic bladder (501) and one end of the screw rod (402); the other end of the telescopic bladder (501) is fixedly connected to the outer wall of the housing (1); and a first one-way valve (502) and a second one-way valve (504) are installed at the end of the telescopic bladder (501) connected to the housing (1); the first one-way valve (502) is connected to an oil suction pipe (503), the oil suction pipe (503) is in communication with an oil storage chamber arranged at the bottom of the housing (1); and the second one-way valve (504) is connected to two oil outlets.

3. The auxiliary braking device of the wire-controlled chassis according to claim 1, characterized in that: The guide portion comprises a guide column (403) and a guide sleeve (405), the guide sleeve (405) being connected to the screw rod (402), the guide sleeve (405) being sleeved on the guide column (403), and the guide column (403) being fixedly installed in the housing (1); an inner groove (4031) communicating with an oil outlet of an oil injection mechanism (5) is provided inside the guide column (403), and a plurality of evenly distributed oil outlet holes (4032) communicating with the inner groove (4031) are provided on the cylindrical surface of the guide column (403).

4. The auxiliary brake device of the wire-controlled chassis according to claim 1, characterized in that: An oil outlet of the oil injection mechanism (5) is arranged above the flow guiding mechanism (11); the flow guiding mechanism (11) comprises a V-shaped groove (1104); the number of the V-shaped grooves (1104) is a plurality, and the plurality of V-shaped grooves (1104) are distributed in a ring array around the ball nut (401); one end of the plurality of V-shaped grooves (1104) is connected to the oil delivery channel, and the groove width of the V-shaped groove (1104) gradually increases in a direction away from the oil delivery channel; and a self-sealing portion is arranged between the V-shaped groove (1104) and the oil delivery channel.

5. The auxiliary braking device of the wire-controlled chassis according to claim 4, characterized in that: The oil delivery channel comprises an annular groove (4012) opened into the ball nut (401), a plurality of fine holes (4013) are evenly arranged on the inner ring of the annular groove (4012), the annular groove (4012) is connected to the threaded groove (4014) through the fine holes (4013), and a plurality of oil inlet holes (4011) are arranged in an annular shape on one side of the annular groove (4012), and the oil inlet holes (4011) are connected to the V-shaped groove (1104).

6. The auxiliary brake device of the wire-controlled chassis according to claim 4, characterized in that: The self-sealing part comprises an iron rod (1103), and a retaining ring (1108) and a guide ring (1106) are fixedly installed in one end of the V-shaped groove (1104) connected to the oil delivery channel; the iron rod (1103) and the guide ring (1106) are slidably sleeved together, a sealing disk (1107) is fixedly connected to one end of the iron rod (1103), and the sealing disk (1107) covers the retaining ring (1108), and a fourth spring (1105) is arranged between the iron rod (1103) and the guide ring (1106); one end of the iron rod (1103) extends out from the V-shaped groove (1104) away from one end of the oil delivery channel.

7. The auxiliary braking device of a wire-controlled chassis according to claim 6, characterized in that: A magnetic block (12) for magnetically attracting the iron rod (1103) is arranged above the flow guide mechanism (11), and the magnetic block (12) is fixedly connected to the top inner wall of the housing (1).

8. The auxiliary brake device of the wire-controlled chassis according to claim 3, characterized in that: The housing (1) is composed of a first shell (101) and a second shell (102); a plurality of connection mechanisms (9) are arranged between the first shell (101) and the second shell (102), the connection mechanism (9) comprising an elastic pull rod, the elastic pull rod is connected to a push ring (7), the push ring (7) is connected to a push strip (701), one end of the push strip (701) is bent, and the bent end of the push strip (701) is arranged on the rear side of the guide sleeve (405).

9. The auxiliary braking device of a wire-controlled chassis according to claim 8, characterized in that: The connecting mechanism (9) further comprises an insert tube (901), wherein the insert tube (901) is fixedly connected to an edge of one side of the first shell (101), and a pressure block (902) and a pressure block (907) are arranged in the insert tube (901), and one side of the pressure block (902) and the pressure block (907) are both provided with inclined surfaces, and the inclined surface of the pressure block (902) and the inclined surface of the pressure block (907) are in contact with each other, and a third spring (908) is installed between the pressure block (907) and the inner wall of one side of the insert tube (901), and one end of the pressure block (907) is connected to a hole body provided on the side wall of the insert tube (901) in a clearance fit; the pressure block (902) is connected to an elastic pull rod.

10. The auxiliary brake device of the wire-controlled chassis according to claim 9, characterized in that: A plurality of insertion holes (1021) for inserting the insert tube (901) are provided on one side edge of the second shell (102), and a locking hole (1022) for inserting the end of the pressure block (907) is provided on one side of the insertion hole (1021).

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