A parking brake for new energy vehicles

Abstract

This invention belongs to the field of braking equipment technology and discloses a parking brake for new energy vehicles, including a brake box, an electric push rod, a guide column, and a parking lock gear located below the brake box. A movable frame is slidably mounted on the outer surface of the guide column, and support columns are fixedly mounted on both the front and rear sides of the inner wall of the movable frame. A braking component is slidably mounted on the outer surface of the support column. A frame is mounted on the inner wall of the brake box through the braking component, and a damage-prevention gear is rotatably mounted inside the frame. This device generates centrifugal force inside the hollow block, thereby "throwing" the internal oil towards the transmission pipe, pushing the sealing cylinder and rotating sleeve to move away from the hollow block, and causing the brake column and brake block to move to a position where they cannot engage with the parking lock gear. This avoids rigid collision damage between the brake block and the high-speed rotating parking lock gear, thus helping to improve vehicle safety during driving.

Description

Technical Field

[0001] The present invention belongs to the technical field of brake equipment, and in particular relates to a parking brake for a new energy vehicle. Background Art

[0002] As a new track for the country to develop in the field of high-tech industries, new energy vehicles have made considerable achievements in recent years. By adopting a clean energy drive combination of battery + motor, it has gotten rid of dependence on fossil fuels and promoted the healthy development of the automobile industry. The chassis of new energy vehicles is heavier (mainly due to the addition of a large number of batteries). Therefore, its parking brake is generally redesigned and an electronic power-assisted brake is adopted. At present, the more mature solution is that the motor drives the brake disc to squeeze with the brake disc through deceleration, and generates friction to limit the movement of the wheel to achieve the purpose of parking braking. The deceleration mechanism cooperates with the screw drive, which not only improves the control of the braking pressure accuracy, but also makes the overall movement irreversible, avoiding the failure of the parking brake function when the motor fails. However, the solution of using friction braking in the existing technology is not perfect enough. For example, when the car is driving at high speed, the children in the car may accidentally press the parking brake button. At this time, if the parking brake is activated, it will cause great damage to the internal components. In the existing technology, relying solely on the driving computer ECU is far from being able to avoid accidents 100%, so it is urgent to solve it. Summary of the invention

[0003] The purpose of the present invention is to provide a parking brake for a new energy vehicle to solve the problems raised in the above background technology.

[0004] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a parking brake for a new energy vehicle, comprising a brake box, an electric push rod, a guide column and a parking lock gear located below the brake box, a movable frame is slidably installed on the outer surface of the guide column, support columns are fixedly installed on the front and rear sides of the inner wall of the movable frame, a brake member is slidably installed on the outer surface of the support column, a No. 1 frame is installed on the inner wall of the brake box through the brake member, an anti-damage gear is rotatably installed inside the No. 1 frame, connecting columns are fixedly installed on both sides of the No. 1 frame, a No. 2 frame located below the anti-damage gear is slidably installed on the outer surface of the connecting column, and a transmission gear is rotatably installed inside the No. 2 frame;

[0005] The brake component includes a brake column slidably mounted on the outer surface of the support column and a hollow block fixedly mounted on both ends of the anti-damage gear, the outer surface of the hollow block is fixedly connected with two groups of transmission pipes, the outer surface sealing sleeve of the transmission pipe is provided with a sealing cylinder, a spring 2 is elastically connected between the transmission pipe and the sealing cylinder, the inner cavity of the hollow block is filled with oil, a rotating sleeve is fixedly mounted on the outer surface of the sealing cylinder, a fixed column is rotatably mounted inside the rotating sleeve through a bearing, a mounting frame is fixedly mounted on one end of the fixed column, the brake column is adapted to be inserted in the middle of the mounting frame, a brake block is fixedly mounted on the bottom of the brake column, a fixing ring 1 and a fixing ring 2 are fixedly sleeved on the outer surface of the brake column, and a spring 1 located between the fixing ring 1 and the mounting frame is movably sleeved.

[0006] As a preferred solution of the present invention, the guide columns are arranged in four groups and are respectively fixedly installed at the four corners of the bottom of the inner wall of the brake box. The electric push rod is fixedly installed on the rear side of the inner wall of the brake box and is fixedly connected to the movable frame.

[0007] As a preferred solution of the present invention, support grooves are provided on both sides of the bottom of the second frame, and the bottom end of the connecting column is fixedly connected to a limit block located in the support groove, and the top of the limit block abuts against the bottom of the inner wall of the support groove.

[0008] As a preferred solution of the present invention, a spring three is movably sleeved on the outer surface of the connecting column, and the two ends of the spring three are elastically connected to the first frame and the second frame respectively, and the anti-damage gear, transmission gear and parking lock gear are distributed separately.

[0009] As a preferred solution of the present invention, the hollow block is connected to a transmission pipe, the transmission pipe is in an "L" shape, and the inner diameter of the transmission pipe is smaller than the inner diameter of the hollow block.

[0010] As a preferred solution of the present invention, the sealing sleeve can generate a displacement along the axis relative to the transmission pipe, and the displacement is greater than the thickness of the brake block.

[0011] As a preferred solution of the present invention, two ends of the spring 1 are elastically connected to the fixing ring 1 and the mounting frame respectively, and the bottom of the mounting frame abuts against the fixing ring 2.

[0012] As a preferred solution of the present invention, the spring coefficient of the spring one is greater than the spring coefficient of the spring three, and the support column is symmetrically arranged on the front and rear sides of the inner wall of the moving frame, so that the brake can slide along the axis of the support column.

[0013] The beneficial effects of the present invention are as follows:

[0014] 1. This device is provided with a transmission gear and an anti-damage gear, and transmits the power from the parking lock gear to the brake part when the car is running at high speed, so as to prevent the brake block from being inserted into the outer surface of the parking lock gear during the driving process of the car, causing damage to the brake parts, which helps to improve the safety of the vehicle. This device is provided with a No. 1 frame and an anti-damage gear, and the two are elastically connected by a spring. When the parking brake button is pressed at high speed, the electric push rod receives the signal and drives the moving frame and the brake part to move downward, so that the transmission gear first contacts and meshes with the parking lock gear and rotates, and then the transmission gear stops moving downward. At this time, the anti-damage gear continues to move downward , so that the transmission gear and the anti-damage gear mesh successively. When the anti-damage gear moves down to the height where it meshes with the transmission gear, the brake block is higher than the parking lock gear. Before the brake block contacts the parking lock gear, the anti-damage gear receives power from the parking lock gear through the transmission gear, and produces a centrifugal effect inside the hollow block, thereby "throwing" its internal oil to the transmission pipe, pushing the sealing cylinder and the rotating sleeve to move toward the side away from the hollow block, driving the brake column and the brake block to move to a position where they cannot be engaged with the parking lock gear, avoiding rigid collision damage between the brake block and the high-speed rotating parking lock gear, and helping to improve the safety of the vehicle during driving.

[0015] 2. The device also utilizes a spring 1 to connect the mounting frame and the fixing ring 1. When the brake column moves downward, the anti-damage gear, the transmission gear and the parking lock gear mesh in sequence and no longer move downward. The moving frame drives the brake column and the fixing ring 1 to compress the spring 1 downward. Therefore, at this time, the mounting frame supporting the spring 1 is connected with the No. 1 frame and the anti-damage gear and no longer moves downward. By compressing the spring 1, the rigid thrust from the electric push rod is converted into a flexible contact force between the anti-damage gear, the transmission gear and the parking lock gear. By setting the spring 1, the brake column and the brake block are pushed upward. At this time, the brake block is still located on the parking lock gear. The upper part of the wheel is in a separated state, so that the anti-damage gear and the transmission gear are in contact with the parking lock gear first, and determine whether the parking lock gear is in a moving state. At the same time, the power from the parking lock gear is transmitted to the brake part through the transmission gear and the anti-damage gear, and the oil inside the hollow block is used to push the sealing cylinder, the mounting frame and the brake block to move to the side away from the hollow block under the centrifugal effect, so as to avoid damage caused by contact between the brake block and the moving parking lock gear. At the same time, the bearing inside the swivel sleeve is used to make the fixed column able to rotate relative to the swivel sleeve without loss, and the rotation of the swivel sleeve and the movement of the fixed column are adapted to make the device more practical.

[0016] 3. Finally, the device also utilizes the transmission gear to contact the parking lock gear first. When the vehicle is stationary, the parking lock gear is stationary. At this time, the transmission gear is adapted to rotate under the elastic pressure of spring three so that it can mesh with the parking lock gear. When the vehicle is in motion, the parking lock gear rotates at high speed, the transmission gear contacts the parking lock gear, and quickly completes the meshing through rotation adaptation. At this time, the transmission gear bears the damage caused by the rigid contact with the parking lock gear when the parking brake is accidentally started during the vehicle's driving process, avoiding damage caused by direct contact between the brake block and the parking lock gear. The downward pressure generated by the continuously compressed spring three makes the transmission gear gradually adapt and mesh with the parking lock gear, and the transmission gear can be connected to the on-board generator as energy recovery, which not only improves the reliability of the device but also achieves energy conservation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an internal schematic diagram of the structure of the present invention;

[0018] Figure 2 It is a front cutaway schematic diagram of the structure of the present invention;

[0019] Figure 3 It is a side cutaway schematic diagram of the structure of the present invention;

[0020] Figure 4 For the present invention Figure 3 A magnified schematic diagram of the structure at center A;

[0021] Figure 5 It is a top view cutaway schematic diagram of the structure of the present invention;

[0022] Figure 6 For the present invention Figure 5 A magnified schematic diagram of the structure at B in the middle;

[0023] Figure 7 It is a schematic diagram of the coordination of the structure of the present invention;

[0024] Figure 8 It is a schematic diagram of the separation of the brake member of the present invention;

[0025] Fig. 9 It is a schematic diagram of the inner cavity of the brake box from a side perspective of the present invention.

[0026] In the figure: 1. brake box; 2. electric push rod; 3. guide column; 4. moving frame; 5. support column; 6. brake part; 61. brake column; 62. brake block; 63. fixing ring 1; 64. fixing ring 2; 65. spring 1; 66. hollow block; 67. transmission pipe; 68. sealing cylinder; 69. spring 2; 610. rotating sleeve; 611. fixing column; 612. mounting frame; 7. frame 1; 8. anti-damage gear; 9. connecting column; 10. spring 3; 11. frame 2; 12. transmission gear; 13. parking lock gear; 14. supporting groove; 15. limit block. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] like Figures 1 to 9 As shown, an embodiment of the present invention provides a parking brake for a new energy vehicle, comprising a brake box 1, an electric push rod 2, a guide column 3 and a parking lock gear 13 located below the brake box 1, a moving frame 4 is slidably installed on the outer surface of the guide column 3, support columns 5 are fixedly installed on both the front and rear sides of the inner wall of the moving frame 4, a brake member 6 is slidably installed on the outer surface of the support column 5, a first frame 7 is installed on the inner wall of the brake box 1 through the brake member 6, an anti-damage gear 8 is rotatably installed inside the first frame 7, connecting columns 9 are fixedly installed on both sides of the first frame 7, a second frame 11 located below the anti-damage gear 8 is slidably installed on the outer surface of the connecting column 9, and a transmission gear 12 is rotatably installed inside the second frame 11;

[0029] The brake member 6 comprises a brake column 61 slidably mounted on the outer surface of the support column 5 and a hollow block 66 fixedly mounted on both ends of the anti-damage gear 8. Two sets of transmission tubes 67 are fixedly connected to the outer surface of the hollow block 66. A sealing sleeve 68 is provided on the outer surface of the transmission tube 67. A spring 2 69 is elastically connected between the transmission tube 67 and the sealing sleeve 68. The inner cavity of the hollow block 66 is filled with oil. A rotating sleeve 610 is fixedly mounted on the outer surface of the sealing sleeve 68. A fixed column 611 is rotatably mounted inside the rotating sleeve 610 through a bearing. A mounting frame 612 is fixedly mounted on one end of the fixed column 611. The brake column 61 is adapted to be inserted in the middle of the mounting frame 612. A brake block 62 is fixedly mounted on the bottom of the brake column 61. A fixing ring 1 63 and a fixing ring 2 64 are fixedly sleeved on the outer surface of the brake column 61, and a spring 1 65 located between the fixing ring 1 63 and the mounting frame 612 is movably sleeved.

[0030] The device is provided with a transmission gear 12 and an anti-damage gear 8, and transmits the power from the parking lock gear 13 to the brake member 6 when the car is running at high speed, so as to prevent the brake block 62 from being inserted into the outer surface of the parking lock gear 13 during the driving process of the car, causing damage to the brake components, thereby helping to improve the safety of the vehicle. The device is provided with a No. 1 frame 7 and an anti-damage gear 8, and is elastically connected with a spring 3 10 therebetween. When the parking brake button is pressed at high speed, the electric push rod 2 receives the signal and drives the moving frame 4 and the brake member 6 to move downward, so that the transmission gear 12 first contacts and meshes with the parking lock gear 13 to rotate, and then the transmission gear 12 stops moving downward. At this time, the anti-damage gear 8 continues to move downward, so that the transmission gear 12 and The anti-damage gear 8 meshes successively. When the anti-damage gear 8 moves downward to a height where it meshes with the transmission gear 12, the brake block 62 is higher than the parking lock gear 13. Before the brake block 62 contacts the parking lock gear 13, the anti-damage gear 8 receives power from the parking lock gear 13 through the transmission gear 12, and generates a centrifugal effect inside the hollow block 66, thereby "throwing" its internal oil toward the transmission pipe 67, pushing the sealing cylinder 68 and the rotating sleeve 610 to move toward the side away from the hollow block 66, driving the brake column 61 and the brake block 62 to move to a position where they cannot be engaged with the parking lock gear 13, avoiding rigid collision damage between the brake block 62 and the high-speed rotating parking lock gear 13, and helping to improve the safety of the vehicle during driving.

[0031] The device also uses a spring 65 to connect the mounting frame 612 and the fixing ring 63. When the brake column 61 moves downward, the anti-damage gear 8, the transmission gear 12 and the parking lock gear 13 are meshed in sequence and no longer move downward. The moving frame 4 drives the brake column 61 and the fixing ring 63 to compress the spring 65 downward. Therefore, at this time, the mounting frame 612 supporting the spring 65 is connected with the first frame 7 and the anti-damage gear 8 and no longer moves downward. By compressing the spring 65, the rigid thrust from the electric push rod 2 is converted into a flexible abutment force between the anti-damage gear 8, the transmission gear 12 and the parking lock gear 13. Through the setting of the spring 65, the brake column 61 and the brake block 62 are pushed upward. At this time, the brake block 62 is still located on the parking lock gear 1 3 and are in a separated state, so that the anti-damage gear 8 and the transmission gear 12 are in contact with the parking lock gear 13 first, and determine whether the parking lock gear 13 is in a moving state. At the same time, the power from the parking lock gear 13 is transmitted to the brake member 6 through the transmission gear 12 and the anti-damage gear 8. The oil inside the hollow block 66 is used to push the sealing cylinder 68, the mounting frame 612 and the brake block 62 to move to the side away from the hollow block 66 under the centrifugal effect, so as to avoid the brake block 62 from contacting with the moving parking lock gear 13 and causing damage. At the same time, the bearing inside the rotating sleeve 610 is used to enable the fixed column 611 to rotate relative to the rotating sleeve 610 without loss, and the rotation of the rotating sleeve 610 and the movement of the fixed column 611 are adapted to make the device more practical.

[0032] Finally, the device also utilizes the transmission gear 12 to contact the parking lock gear 13 first. When the vehicle is stationary, the parking lock gear 13 is stationary. At this time, the transmission gear 12 is able to mesh with the parking lock gear 13 through rotation adaptation under the elastic pressure of the spring three 10. When the vehicle is in driving state, the parking lock gear 13 rotates at a high speed, the transmission gear 12 contacts the parking lock gear 13, and quickly completes the meshing through rotation adaptation. At this time, the transmission gear 12 bears the damage caused by the rigid contact with the parking lock gear 13 when the parking brake is accidentally started during the driving of the vehicle, avoiding direct contact between the brake block 62 and the parking lock gear 13 and causing damage. The downward pressure generated by the continuously compressed spring three 10 makes the transmission gear 12 gradually adapt and mesh with the parking lock gear 13, and the transmission gear 12 can be connected to the on-board generator as energy recovery, which not only improves the reliability of the device but also achieves energy conservation.

[0033] The guide posts 3 are arranged in four groups and are respectively fixedly mounted at the four corners of the bottom of the inner wall of the brake box 1. The electric push rod 2 is fixedly mounted on the rear side of the inner wall of the brake box 1 and is fixedly connected to the moving frame 4.

[0034] The guide column 3 provides guidance and sliding support for the moving frame 4. When the electric push rod 2 drives the moving frame 4 to move up and down, the guide column 3 can prevent the movement of the moving frame 4 from being inaccurate.

[0035] The left and right sides of the bottom of the second frame 11 are provided with support grooves 14, and the bottom end of the connecting column 9 is fixedly connected with a limit block 15 located in the support groove 14, and the top of the limit block 15 abuts against the bottom of the inner wall of the support groove 14;

[0036] When the parking brake mode is turned off, the transmission gear 12 does not contact the parking lock gear 13. At this time, the second frame 11 is supported by the limit block 15 located inside the support groove 14 to prevent the bumps caused by the vehicle driving from driving the second frame 11 and the transmission gear 12 up and down.

[0037] The outer surface of the connecting column 9 is movably sleeved with a spring 3 10, and the two ends of the spring 3 10 are elastically connected to the first frame 7 and the second frame 11 respectively, and the anti-damage gear 8, the transmission gear 12 and the parking lock gear 13 are separated from each other;

[0038] When the transmission gear 12 abuts against the parking lock gear 13 and meshes with each other through rotation adaptation, the No. 1 frame 7 drives the anti-damage gear 8 and the connecting column 9 to continue to move downward, and continuously compresses the spring three 10, so that the spring three 10 generates a rebound force, so as to keep the anti-damage gear 8 and the transmission gear 12 meshing and disengaging automatically.

[0039] The hollow block 66 is connected to the transmission tube 67, the transmission tube 67 is in an "L" shape, and the inner diameter of the transmission tube 67 is smaller than the inner diameter of the hollow block 66;

[0040] like Figure 7 As shown, the transmission tube 67 of "L" shape has a section which is perpendicular to the hollow block 66. The oil flowing through this section will move toward the transmission tube 67 due to the centrifugal effect generated when the hollow block 66 rotates, thereby generating power to push the fixing column 611, the mounting frame 612 and the brake column 61 away from one side of the hollow block 66, driving the brake block 62 away from the outer surface of the parking lock gear 13 to avoid being stuck therewith.

[0041] The sealing tube 68 can generate a displacement along the axis relative to the transmission tube 67, and the displacement is greater than the thickness of the brake block 62;

[0042] The maximum distance that the sealing cylinder 68 moves relative to the transmission tube 67 can keep the brake block 62 away from the periphery of the parking lock gear 13 , and when the brake block 62 moves downward, it will not contact the parking lock gear 13 .

[0043] The two ends of the spring 1 65 are elastically connected to the fixing ring 1 63 and the mounting frame 612 respectively, and the bottom of the mounting frame 612 is in contact with the fixing ring 2 64;

[0044] When spring three 10 is compressed, brake column 61 and fixing ring one 63 also drive brake block 62 to move downward synchronously through compression spring one 65, thereby realizing three-level sequential movement and abutment of transmission gear 12, anti-damage gear 8 and brake block 62, so that brake block 62 is engaged with parking lock gear 13 in the last step and limits the rotation of parking lock gear 13.

[0045] Among them, the spring coefficient of the spring 1 65 is greater than the spring coefficient of the spring 3 10, and the support column 5 is symmetrically arranged on the front and rear sides of the inner wall of the mobile frame 4, so that the brake member 6 can slide along the axis of the support column 5;

[0046] When spring 1 65 is compressed to the same stroke, it will generate an elastic force greater than that of spring 3 10. Therefore, when the brake column 61 drives the brake block 62 and the fixing ring 1 63 to compress the spring 1 65, the anti-damage gear 8 will be driven to engage with the transmission gear 12 first. When the vehicle is running at high speed, the brake block 62 is first pushed to move to the side away from the parking lock gear 13 through the oil inside the hollow block 66.

[0047] Working principle:

[0048] The brake is used for parking brake of new energy vehicles. When the vehicle stops, the parking lock gear 13 stops rotating. When the brake receives the electronic parking signal, the electric push rod 2 is started and drives the moving frame 4 to move downward as a whole. Since the transmission gear 12 is located above the parking lock gear 13 and is closest to the parking lock gear 13 when moving downward, the transmission gear 12 first contacts with the parking lock gear 13 and is adapted to mesh with the parking lock gear 13 through rotation. Then the first frame 7 drives the anti-damage gear 8 and the connecting column 9 to move downward, compressing the spring three 10 until the anti-damage gear 8 contacts with the transmission gear 12 and is adapted to mesh with the transmission gear 12 through rotation. Finally, the brake column 61 and the brake block 62 continue to move downward relative to the first frame 7 and the mounting frame 612 under the drive of the moving frame 4, compressing the spring one 65. Finally, the brake block 62 is stuck in the outer surface of the parking lock gear 13 to complete the limit fixation of the parking lock gear 13 and realize the static parking function.

[0049] When the vehicle is in a high-speed driving state, the brake receives an electronic parking signal because the occupant accidentally touches the electronic parking button, the electric push rod 2 is started, and drives the moving frame 4 to move downward as a whole, the transmission gear 12 first contacts with the parking lock gear 13, and adapts and meshes with the parking lock gear 13 through rotation. At this time, the transmission gear 12 will rotate at a high speed, and then the first frame 7 drives the anti-damage gear 8 and the connecting column 9 to move downward, compressing the spring three 10, until the anti-damage gear 8 contacts with the transmission gear 12, and adapts and meshes with the transmission gear 12 through rotation, and the anti-damage gear 8 also As it rotates, the anti-damage gear 8 rotates at high speed around the axis of the anti-damage gear 8 on behalf of the hollow block 66, the transmission tube 67 and the rotating sleeve 610 as a whole, and generates a centrifugal effect inside the hollow block 66, so that the oil in the hollow block 66 enters the sealing cylinder 68 along the transmission tube 67, and pushes the rotating sleeve 610, the fixing column 611, the brake block 62 and the brake column 61 to move toward the side away from the hollow block 66, driving the brake block 62 to move and away from the top of the parking lock gear 13, so that the brake block 62 cannot be stuck in the outer surface of the parking lock gear 13 when it finally moves down.

[0050] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A parking brake for a new energy vehicle, comprising a brake box (1), an electric push rod (2), a guide column (3) and a parking lock gear (13) located below the brake box (1), wherein a moving frame (4) is slidably mounted on the outer surface of the guide column (3), and characterized in that: Support columns (5) are fixedly mounted on both the front and rear sides of the inner wall of the moving frame (4); a brake component (6) is slidably mounted on the outer surface of the support column (5); a first frame (7) is mounted on the inner wall of the brake box (1) via the brake component (6); an anti-damage gear (8) is rotatably mounted inside the first frame (7); connecting columns (9) are fixedly mounted on both sides of the first frame (7); a second frame (11) located below the anti-damage gear (8) is slidably mounted on the outer surface of the connecting column (9); a transmission gear (12) is rotatably mounted inside the second frame (11); The brake member (6) comprises a brake column (61) slidably mounted on the outer surface of the support column (5) and a hollow block (66) fixedly mounted on both ends of the anti-damage gear (8); the outer surface of the hollow block (66) is fixedly connected with two sets of transmission pipes (67); the outer surface sealing sleeve of the transmission pipe (67) is provided with a sealing cylinder (68); a spring 2 (69) is elastically connected between the transmission pipe (67) and the sealing cylinder (68); the inner cavity of the hollow block (66) is filled with oil; the outer surface of the sealing cylinder (68) is fixedly mounted with a rotating sleeve (69); 10), a fixed column (611) is rotatably mounted inside the rotating sleeve (610) via a bearing, a mounting frame (612) is fixedly mounted on one end of the fixed column (611), the brake column (61) is adapted to be plugged into the middle of the mounting frame (612), a brake block (62) is fixedly mounted on the bottom of the brake column (61), a fixed ring 1 (63) and a fixed ring 2 (64) are fixedly sleeved on the outer surface of the brake column (61), and a spring 1 (65) located between the fixed ring 1 (63) and the mounting frame (612) is movably sleeved.

2. A parking brake for a new energy vehicle according to claim 1, characterized in that: The guide columns (3) are arranged in four groups and are respectively fixedly mounted at the four corners of the bottom of the inner wall of the brake box (1); the electric push rod (2) is fixedly mounted on the rear side of the inner wall of the brake box (1) and is fixedly connected to the moving frame (4).

3. A parking brake for a new energy vehicle according to claim 2, characterized in that: Support grooves (14) are provided on both left and right sides of the bottom of the second frame (11); a limit block (15) located in the support groove (14) is fixedly connected to the bottom end of the connecting column (9); the top of the limit block (15) abuts against the bottom of the inner wall of the support groove (14).

4. The parking brake for a new energy vehicle according to claim 3 is characterized in that: The outer surface of the connecting column (9) is movably sleeved with a spring three (10), and the two ends of the spring three (10) are elastically connected to the first frame (7) and the second frame (11) respectively, and the anti-damage gear (8), the transmission gear (12) and the parking lock gear (13) are distributed in a spaced relationship.

5. The parking brake for a new energy vehicle according to claim 4, characterized in that: The hollow block (66) is in communication with a transmission tube (67); the transmission tube (67) is in an "L" shape; and the inner diameter of the transmission tube (67) is smaller than the inner diameter of the hollow block (66).

6. A parking brake for a new energy vehicle according to claim 5, characterized in that: The sealing cylinder (68) can generate a displacement along the axis relative to the transmission tube (67), and the displacement is greater than the thickness of the brake block (62).

7. The parking brake for a new energy vehicle according to claim 6, characterized in that: The two ends of the spring one (65) are elastically connected to the fixing ring one (63) and the mounting frame (612) respectively, and the bottom of the mounting frame (612) is in contact with the fixing ring two (64).

8. The parking brake for a new energy vehicle according to claim 7, characterized in that: The spring coefficient of the first spring (65) is greater than the spring coefficient of the third spring (10), and the support column (5) is symmetrically arranged on the front and rear sides of the inner wall of the moving frame (4), so that the brake member (6) can slide along the axis of the support column (5).

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