Brake release mechanism and mower

Abstract

The utility model discloses a brake release mechanism and hay mower relates to hay mower technical field, including limit lever, stay rope and operating piece, one end of stay rope is connected with first brake lever, the other end passes through limit lever and is connected with operating piece, the stay rope is also slip connection with second brake lever, the stay rope is sleeved with casing pipe, the stay rope is slip connection in casing pipe, and the operating piece is connected with the operating piece. The inhaul cable can have a free state and a tensioning state by operating the operating piece, when the inhaul cable is in the free state, the two electromagnetic brake discs are both in the locking state to lock the electromagnetic brake, and when the inhaul cable is in the tensioning state, the first brake rod drives the first electromagnetic brake disc to be in the releasing state; the two ends of the sleeve are in abutting fit with the limiting rod and the second brake rod so that the second electromagnetic brake disc can be in a release state, and the electromagnetic brake is released. The electromagnetic brake release mechanism solves the problem that electromagnetic brake release operation is complex, has the stable and convenient effects, achieves simultaneous release of two electromagnetic brakes, and improves the convenience of mechanism use.

Description

Technical Field

[0001] The utility model relates to the technical field of lawn mowers, in particular to a brake release mechanism and a lawn mower. Background Art

[0002] A lawn mower is an automated mechanical tool for mowing lawns that can replace manual labor to reduce manpower and labor costs. It allows the driver to control the lawn while riding. In recent years, with the continuous development of electronic information technology and science and technology and the increasing awareness of environmental protection, electric lawn mowers that use electricity as energy have begun to appear.

[0003] At present, the rear wheels of electric lawn mowers are usually driven by motor gearboxes. In order to achieve parking brake in the power-off state, an electromagnetic brake is usually installed at the tail of the travel motor, that is, when the whole machine is powered on, the electromagnetic brake is powered on, the electromagnetic brake disc is separated from the motor, the spring is elastically deformed under force and maintains a tendency to reset; when the whole machine is powered off, the electromagnetic brake is powered off, and the spring resets to apply pressure to the electromagnetic brake disc, so that the electromagnetic brake disc and the motor are against each other, thereby locking the motor rotor, thereby achieving parking brake for the whole vehicle. In some special cases, when it is necessary to move the vehicle in the power-off state, it is generally necessary to install a brake release mechanism on the lawn mower so that the electromagnetic brake disc can be manually opened through the brake release mechanism so that the vehicle can be pushed or towed.

[0004] Generally, the electromagnetic brake device of a lawn mower includes two left and right electromagnetic brakes arranged opposite to each other. Therefore, when the vehicle needs to be moved in a power-off state, the electromagnetic brake discs of the left and right electromagnetic brakes need to be separated from the motor. However, the current brake release mechanism cannot achieve the linkage of the left and right electromagnetic brakes, that is, it is impossible to release the left and right electromagnetic brakes at the same time. Instead, the two electromagnetic brakes need to be released one by one, that is, the electromagnetic brake discs need to be separated from the corresponding motors one by one. The operation is complicated and cumbersome, and therefore needs to be improved. Utility Model Content

[0005] In order to overcome the disadvantage of complicated and cumbersome release operation of electromagnetic brake in the prior art, the utility model provides a brake release mechanism, which is simple and convenient to operate and improves the convenience of using the mechanism.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A brake release mechanism comprises a limit rod, a cable and an operating member, wherein one end of the cable is connected to a first brake rod for driving a first electromagnetic brake disc to move, and the other end passes through the limit rod and is connected to the operating member, the portion of the cable located between the limit rod and the first brake rod is also slidably connected to a second brake rod for driving a second electromagnetic brake disc to move, the portion of the cable located between the limit rod and the second brake rod is sleeved with a sleeve, the cable is slidably connected in the sleeve, and the cable can be made to have a free state and a tensioned state by operating the operating member, when the cable is in the free state, the first electromagnetic brake disc and the second electromagnetic brake disc are in a locked state to lock the electromagnetic brake, when the cable is in a tensioned state, the first brake rod drives the first electromagnetic brake disc to be in a released state to release the electromagnetic brake, and the two ends of the sleeve are respectively abutted and cooperated with the limit rod and the second brake rod to make the second brake rod slide toward the direction of the first brake rod, so that the second electromagnetic brake disc is in a released state to release the electromagnetic brake.

[0008] In the above technical solution, when the brake release mechanism is applied, a part of the frame is used as a limit rod or the limit rod is installed on the frame, and then the first brake rod and the second brake rod are respectively installed on the two electromagnetic brake discs of the frame. When the whole vehicle is in a power-off state, that is, the spring in the electromagnetic brake device applies pressure to the electromagnetic brake disc so that the electromagnetic brake disc is against the motor, so that the vehicle cannot move, that is, at this time, the cable is in a free state, and the first electromagnetic brake disc and the second electromagnetic brake disc are in a locked state to lock the electromagnetic brake. When it is necessary to enable the vehicle to move in the power-off state, the cable is changed from a free state to a tensioned state by operating the operating member, so that the first brake rod drives the first electromagnetic brake disc to be in a released state to release the electromagnetic brake, and at the same time, the two ends of the sleeve are respectively in contact with the limit rod and the second brake rod, so that the second brake rod slides in the direction of the first brake rod, so that the second electromagnetic brake disc is in a released state to release the electromagnetic brake. Therefore, by operating the operating member, the first electromagnetic brake disc and the second electromagnetic brake disc are simultaneously converted to a released state to release the electromagnetic brake, thereby realizing the simultaneous release of the two electromagnetic brakes. The operation is simple and convenient, which improves the convenience of using the mechanism, and the overall structure of the release mechanism is simple, which improves the convenience of assembling the mechanism. At the same time, a cable is used for driving, so that the force position and direction of the cable are adjustable when the operator operates, without limiting the force position of the operator to the bottom or inside of the frame, which is convenient for the operator to operate and further improves the convenience of using the mechanism.

[0009] Preferably, the cable is slidably connected to the limit rod, and the operating member is a handle provided on the cable, and the cable can be slid by pulling the handle to switch the cable between a free state and a tensioned state.

[0010] In the structure, the handle is pulled to make the cable slide relative to the limit rod, so as to realize the switching of the free state and the tensioned state of the cable. The operation is simple and convenient. At the same time, the force application position and direction of the cable are adjustable when the operator operates, without the need to limit the force application position of the operator to the bottom or inside of the frame, which facilitates the operation of the operator and further improves the convenience of using the mechanism.

[0011] Preferably, the handle is provided with a limit slot, and when the cable is in a free state, the limit rod is inserted into the limit slot to limit the handle from sliding relative to the limit rod, and when the handle is pulled and rotated to put the cable in a tensioned state, the portion of the handle located around the notch of the limit slot abuts against the side of the limit rod away from the first brake lever.

[0012] In the structure, the limit rod is inserted into the limit groove to limit the sliding of the handle relative to the limit rod, that is, to limit the sliding of the cable relative to the limit rod, so that the cable remains in a free state, that is, the first electromagnetic brake disc and the second electromagnetic brake disc remain in a locked state to lock the electromagnetic brake. Applying a pulling force to the handle to pull the handle causes the handle to slide relative to the limit rod and slide in a direction away from the first brake rod, so that the limit rod is no longer inserted into the limit groove, and the cable slides relative to the limit rod, so that the cable is converted into a tensioned state, and then the handle is rotated, wherein when the cable is in a tensioned state, the application of the pulling force to the handle is canceled, and the first brake rod can pull the cable so that the part of the handle located around the notch of the limit groove is against the side of the limit rod away from the first brake rod, so that the handle no longer slides relative to the limit rod, so that there is no need to manually apply a pulling force to the handle to keep the cable in a tensioned state, making the operation of the mechanism more convenient and improving the convenience of using the mechanism.

[0013] Preferably, the handle is provided with a gripping portion, and limiting rods are provided at both ends of the gripping portion, the two limiting rods are arranged opposite to each other, and the opposite sides of the two limiting rods and the gripping portion together form an avoidance groove and the limiting groove, the distance between the groove walls on both sides of the avoidance groove is smaller than the distance between the groove walls on both sides of the limiting groove, and the limiting groove is located between the avoidance groove and the limiting rods.

[0014] In the structure, the distance between the groove walls on both sides of the avoidance groove is smaller than the distance between the groove walls on both sides of the limiting groove. Therefore, when the limiting rod is inserted into the limiting groove, the groove wall of the limiting groove close to the avoidance groove abuts against the limiting rod. The avoidance groove increases the operating space for the operator, making it easier for the operator to hold the grip of the handle, thereby making it easier for the operator to apply force to the handle, thereby making it easier for the operator to operate and improving the convenience of using the mechanism.

[0015] Preferably, the sleeve includes a first hose and an adjusting sleeve, the adjusting sleeve is provided with an internal thread, one end of the first hose is provided with an external thread matching the internal thread in the adjusting sleeve and is threadedly connected to the adjusting sleeve.

[0016] In the structure, the length of the first hose extending out of the adjustment sleeve can be adjusted by rotating the first hose, so that the overall length of the sleeve can be adjusted, so that the overall length of the sleeve can be adjusted according to different usage requirements and usage conditions, so that the mechanism can be suitable for different usage conditions, thereby improving the practicality of the mechanism.

[0017] Preferably, the sleeve also includes a second hose, the first hose and the second hose are connected through the adjustment sleeve and are respectively located at two ends of the adjustment sleeve, one end of the second hose is provided with an external thread adapted to the internal thread in the adjustment sleeve, and is threadedly connected to the adjustment sleeve.

[0018] In the structure, the length of the second hose extending out of the adjustment sleeve can be adjusted by rotating the second hose, thereby expanding the adjustment range for the overall length of the sleeve, making the mechanism applicable to more different usage requirements and usage conditions, and further improving the practicality of the mechanism.

[0019] Preferably, both ends of the sleeve are provided with abutment blocks, and the cable is passed through and slidably connected to the abutment blocks.

[0020] In the structure, when the cable is in a tensioned state, the two ends of the sleeve are respectively abutted against the limit rod and the second brake rod, that is, the abutment blocks at the two ends of the sleeve are respectively abutted against the limit rod and the second brake rod, thereby reducing the deformation of the sleeve during the abutment process and affecting the use of the mechanism, thereby improving the stability of the mechanism.

[0021] Preferably, the first brake lever and the second brake lever are both provided with sliding grooves, and the first brake lever and the second brake lever are both provided with notches connected to the corresponding sliding grooves, and the cable can be inserted into the corresponding sliding groove through the notches.

[0022] In the structure, when the cable needs to be installed on the first brake lever and the second brake lever, the cable is inserted into the corresponding sliding groove through the notch, thereby installing the cable on the first brake lever and the second brake lever. The opening of the notch makes the installation of the cable more convenient, thereby improving the convenience of mechanism installation.

[0023] Preferably, a limiting block is provided at one end of the cable away from the operating member, and when the cable is in a tensioned state, the limiting block abuts and cooperates with a side of the first brake lever away from the second brake lever.

[0024] In the structure, when the cable is in a tensioned state, the limiting block abuts against the side of the first brake lever facing away from the second brake lever, so that the cable can apply a thrust to the first brake lever through the limiting block, so that the first brake lever drives the first electromagnetic brake disc to a released state to release the electromagnetic brake, without the need to fix one end of the cable to the first brake lever, thereby facilitating the replacement and installation of the cable and improving the convenience of the mechanism installation.

[0025] A lawn mower comprises a frame and a brake release mechanism, a part of the frame can be used as the limit rod or the limit rod is set on the frame, a left connecting rod and a right connecting rod are respectively arranged on both sides of the frame, the left connecting rod is provided with a left action wheel and a second driving motor for driving the left action wheel to move, the right connecting rod is provided with a right action wheel and a first driving motor for driving the right action wheel to rotate, a first electromagnetic brake disc and a second electromagnetic brake disc are respectively arranged on the side facing each other of the first driving motor and the second driving motor, the first electromagnetic brake disc and the second electromagnetic brake disc are located between the left connecting rod and the right connecting rod, the first brake rod is arranged on the first electromagnetic brake disc, and the second brake rod is arranged on the second electromagnetic brake disc.

[0026] In the above technical solution, when the brake release mechanism is applied, a part of the frame is used as a limit rod or the limit rod is installed on the frame, and then the first brake rod and the second brake rod are respectively installed on the two electromagnetic brake discs of the frame. When the whole vehicle is in a power-off state, the spring in the electromagnetic brake device applies pressure to the electromagnetic brake disc to make the electromagnetic brake disc and the motor abut, that is, the first electromagnetic brake disc abuts against the first drive motor, and the second electromagnetic brake disc abuts against the second drive motor, thereby locking the motor rotors of the first drive motor and the second drive motor, so that the left and right driving wheels no longer rotate, thereby realizing the parking brake of the whole vehicle. At this time, the cable is in a free state, and the first and second electromagnetic brake discs are in a locked state to lock the electromagnetic brake. When the vehicle needs to be able to move in a power-off state, the cable is changed from a free state to a tensioned state by operating the operating member, so that the first brake lever drives the first electromagnetic brake disc to move, so that the first electromagnetic brake disc no longer abuts against the first drive motor, that is, the first electromagnetic brake disc is in a released state to release the electromagnetic brake, and at the same time, the two ends of the sleeve are respectively abutted with the limit rod and the second brake lever, so that the second brake lever slides toward the direction of the first brake lever, so that the second electromagnetic brake disc no longer abuts against the second drive motor, that is, the second electromagnetic brake disc is in a released state to release the electromagnetic brake. Therefore, by operating the operating member, the first electromagnetic brake disc and the second electromagnetic brake disc are simultaneously converted to a released state to release the electromagnetic brake, thereby realizing the simultaneous release of the two electromagnetic brakes, so that the motor rotors of the first drive motor and the second drive motor are no longer locked, so that the left and right driving wheels can rotate relative to the frame, that is, the vehicle can be pushed or towed. The operation of releasing two electromagnetic brakes at the same time is simple and convenient, which improves the convenience of using the lawn mower. The overall structure of the release mechanism is simple, which improves the convenience of assembling the lawn mower. At the same time, a cable is used for driving, so that the force application position and direction of the cable can be adjusted when the operator operates, without limiting the force application position of the operator to the bottom or inside of the frame, which is convenient for the operator to operate and further improves the convenience of using the lawn mower.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. The two electromagnetic brakes are released simultaneously through the cable and the casing, which is simple and convenient to operate and improves the convenience of the mechanism;

[0029] 2. The overall structure of the release mechanism is simple, which improves the convenience of mechanism assembly;

[0030] 3. The use of cables for driving means that the operator's force application position is no longer limited to the bottom or inside of the frame, which is convenient for the operator to operate and further improves the convenience of the mechanism;

[0031] 4. The overall length of the sleeve can be adjusted according to different usage requirements and usage conditions, so that the mechanism can be suitable for different usage conditions, thereby improving the practicability of the mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the present application when the cable is in a free state;

[0033] Figure 2 This is a schematic diagram of the overall structure of the first embodiment of the present application when the cable is in a tightened state;

[0034] Figure 3 This is a schematic diagram of the handle structure of the first embodiment of the present application;

[0035] Figure 4 It is a schematic diagram of the cable structure of the first embodiment of the present application.

[0036] Figure 5 This is a schematic diagram of the casing structure of the first embodiment of the present application;

[0037] Figure 6 This is a schematic diagram of the limiting block structure of the first embodiment of the present application;

[0038] Figure 7 This is an enlarged schematic diagram of the structure at location A of the first embodiment of the present application;

[0039] Figure 8 It is a schematic diagram of the overall structure of the second embodiment of the present application.

[0040] Explanation of the accompanying drawings: 1. limit rod; 2. cable; 3. operating member; 4. first brake rod; 5. second brake rod; 6. sleeve; 7. frame; 21. limit block; 22. limit block; 31. handle; 41. sliding groove; 42. notch; 61. first hose; 62. adjustment sleeve; 63. second hose; 64. abutment block; 71. left connecting rod; 72. right connecting rod; 311. limit groove; 312. gripping part; 313. limit rod; 314. avoidance groove; 315. installation groove; 611. first connecting rod; 631. second connecting rod; 711. left action wheel; 712. second drive motor; 721. right action wheel; 722. first drive motor; 3121. gripping rod; 7121. second electromagnetic brake disc; 7221. first electromagnetic brake disc. DETAILED DESCRIPTION

[0041] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0042] The first embodiment of the present application discloses a brake release mechanism.

[0043] Reference Figure 1 and Figure 2 A brake release mechanism includes a limit rod 1, a cable 2 and an operating member 3. One end of the cable 2 is equipped with a first brake rod 4 for driving a first electromagnetic brake disc 7221 to move, and the other end passes through the limit rod 1 and is equipped with the operating member 3. The portion of the cable 2 located between the limit rod 1 and the first brake rod 4 is also slidably connected with a second brake rod 5 for driving a second electromagnetic brake disc 7121 to move, and the portion of the cable 2 located between the limit rod 1 and the second brake rod 5 is sleeved with a sleeve 6. The sleeve 6 is a rubber tube, and the sleeve 6 has a bent state and a straight state.

[0044] Reference Figure 1 and Figure 2 , the cable 2 is slidably connected in the sleeve 6, and the cable 2 can be in a free state and a tensioned state by operating the operating member 3. When the cable 2 is in a free state, the sleeve 6 is in a bent state, and the distance between the two ends of the sleeve 6 is less than the distance between the limit rod 1 and the second brake rod 5, so that both ends of the sleeve 6 do not contact the limit rod 1 and the second brake rod 5, and the first electromagnetic brake disc 7221 and the second electromagnetic brake disc 7121 are in a locked state to lock the electromagnetic brake. When the cable 2 is in a tensioned state, the first brake rod 4 drives the first electromagnetic brake disc 7221 to be in a released state to release the electromagnetic brake, and the sleeve 6 is in a straightened state. At this time, the distance between the two ends of the sleeve 6 is greater than the distance between the second brake rod 5 and the limit rod 1, so that the two ends of the sleeve 6 are respectively in contact with the limit rod 1 and the second brake rod 5, and the second brake rod 5 can be pushed to slide toward the direction of the first brake rod 4, so that the second electromagnetic brake disc 7121 is in a released state to release the electromagnetic brake.

[0045] Reference Figure 1 and Figure 2 In order to enable the cable 2 to have a free state and a tensioned state by operating the operating member 3, the cable 2 is slidably connected to the limit rod 1. The operating member 3 is a handle 31 installed on the cable 2. By pulling the handle 31, the cable 2 can slide to achieve the switching of the cable 2 between the free state and the tensioned state.

[0046] In another embodiment, the operating member 3 is a roller rotatably connected to the limit rod 1, and one end of the cable 2 is fixedly connected to the roller. The roller is rotated in different directions to make the cable 2 wrap around the roller or the wrapped cable 2 detach from the roller, thereby realizing the switching of the cable 2 between the free state and the tensioned state.

[0047] The implementation principle of a brake release mechanism and a lawn mower in the first embodiment of the present application is as follows:

[0048] When the brake release mechanism is applied, a part of the frame 7 is used as the limit rod 1 or the limit rod 1 is installed on the frame 7, and then the first brake rod 4 and the second brake rod 5 are respectively installed on the two electromagnetic brake discs of the frame 7. When the whole vehicle is in a power-off state, that is, the spring in the electromagnetic brake device applies pressure to the electromagnetic brake disc so that the electromagnetic brake disc and the motor are against each other, so that the vehicle cannot move, that is, at this time, the cable 2 is in a free state, and the first electromagnetic brake disc 7221 and the second electromagnetic brake disc 7121 are in a locked state to lock the electromagnetic brake. When the vehicle needs to be moved in a power-off state, the cable 2 is changed from a free state to a tensioned state by operating the operating member 3, that is, a pulling force is applied to the handle 31, that is, the handle 31 is pulled to make the cable 2 slide relative to the limit rod 1, so that the cable 2 is changed from a free state to a tensioned state, so that the first brake rod 4 drives the first electromagnetic brake disc 7221 to be in a released state to release the electromagnetic brake, and at the same time, the two ends of the sleeve 6 are respectively abutted against the limit rod 1 and the second brake rod 5, so that the second brake rod 5 slides toward the direction of the first brake rod 4, thereby making the second electromagnetic brake disc 7121 in a released state to release the electromagnetic brake. Therefore, by operating the operating member 3, the first electromagnetic brake disc 7221 and the second electromagnetic brake disc 7121 are simultaneously converted to the released state to release the electromagnetic brake, thereby realizing the simultaneous release of the two electromagnetic brakes. The operation is simple and convenient, which improves the convenience of using the mechanism, and the overall structure of the release mechanism is simple, which improves the convenience of assembling the mechanism. At the same time, the cable 2 is used for driving, so that the force position and direction of the cable 2 are adjustable when the operator operates, without limiting the force position of the operator to the bottom or inside of the frame 7, which is convenient for the operator's operation and further improves the convenience of using the mechanism.

[0049] Reference Figure 2 and Figure 3In order to facilitate the fixation of the cable 2 in a tensioned state, the handle 31 is provided with a limit groove 311. When the cable 2 is in a free state, the limit rod 1 is inserted into the limit groove 311 to limit the handle 31 from sliding relative to the limit rod 1. When the cable 2 is in a tensioned state, the portion of the handle 31 located around the notch of the limit groove 311 abuts against the side of the limit rod 1 away from the first brake lever 4. When a pulling force is applied to the handle 31 to pull the handle 31 and switch the cable 2 to a tensioned state, even if the handle 31 slides relative to the limit rod 1 and slides in a direction away from the first brake rod 4, the limit rod 1 is no longer stuck in the limit groove 311, and the cable 2 slides relative to the limit rod 1 until it is in a tensioned state, and then the handle 31 is rotated. When the cable 2 is in a tensioned state, the pulling force applied to the handle 31 is canceled, and the first brake rod 4 can pull the cable 2 so that the portion of the handle 31 located around the notch of the limit groove 311 maintains a tight abutment with the side of the limit rod 1 away from the first brake rod 4, and the limit rod 1 limits the sliding of the handle 31 in the direction close to the first brake rod 4, so that the handle 31 no longer slides relative to the limit rod 1, thereby eliminating the need to manually apply a pulling force to the cable 2 to keep the cable 2 in a tensioned state.

[0050] Furthermore, in order to facilitate the operator to pull the handle 31, the handle 31 is installed with a gripping portion 312, and both ends of the gripping portion 312 are integrally formed with limiting rods 313. The two limiting rods 313 are arranged opposite to each other, and the two sides of the limiting rods 313 facing each other and the gripping portion 312 are surrounded to form an avoidance groove 314 and a limiting groove 311. The distance between the groove walls on both sides of the avoidance groove 314 is smaller than the distance between the groove walls on both sides of the limiting groove 311. The limiting groove 311 is located between the avoidance groove 314 and the limiting rod 1. The avoidance groove 314 provides an operating space for the operator, so that the operator can apply a pulling force to the handle 31 by holding the gripping portion 312.

[0051] Reference Figure 4 and Figure 5 In order to adjust the overall length of the sleeve 6 according to different use requirements, the sleeve 6 includes a first hose 61 and an adjustment sleeve 62. The adjustment sleeve 62 is provided with an internal thread. One end of the first hose 61 is provided with an external thread that matches the internal thread in the adjustment sleeve 62 and is threadedly connected in the adjustment sleeve 62. The cable 2 is passed through and slidably connected in the first hose 61 and the adjustment sleeve 62. By rotating the first hose 61, that is, the first hose 61 rotates relative to the adjustment sleeve 62, the length of the first hose 61 extending out of the adjustment sleeve 62 can be adjusted, thereby achieving the adjustment of the overall length of the sleeve 6, so that the overall length of the sleeve 6 can be adjusted according to different use requirements and use conditions, so that the mechanism can be suitable for different use conditions.

[0052] Furthermore, in order to expand the adjustable range of the overall length of the sleeve 6, the sleeve 6 also includes a second hose 63. The first hose 61 and the second hose 63 are connected through the adjustment sleeve 62 and are respectively located at both ends of the adjustment sleeve 62. One end of the second hose 63 is provided with an external thread that matches the internal thread in the adjustment sleeve 62 and is threadedly connected in the adjustment sleeve 62. The cable 2 is passed through and slidably connected in the second hose 63. By rotating the second hose 63, the second hose 63 is rotated relative to the adjustment sleeve 62, so that the length of the second hose 63 extending out of the adjustment sleeve 62 can be adjusted, thereby expanding the adjustment range for adjusting the overall length of the sleeve 6, so that the mechanism can be applied to more different usage requirements and usage conditions.

[0053] Considering that the first hose 61 and the second hose 63 are easily deformed when the two ends of the sleeve 6 are respectively in contact with the limit rod 1 and the second brake rod 5, an abutment block 64 can be fixedly connected to the end of the first hose 61 and the second hose 63 away from the adjustment sleeve 62, and the cable 2 is passed through and slidably connected to the abutment block 64, and the abutment block 64 is a metal sleeve. Therefore, when the two ends of the sleeve 6 are respectively in contact with the limit rod 1 and the second brake rod 5, the abutment blocks 64 at the two ends of the sleeve 6 are respectively in contact with the limit rod 1 and the second brake rod 5, thereby reducing the deformation of the first hose 61 and the second hose 63 during the abutment process and affecting the use of the mechanism, and ensuring the stability of the use of the mechanism.

[0054] Reference Figure 6 and Figure 7 In order to facilitate the installation of the cable 2 on the first brake lever 4 and the second brake lever 5, the first brake lever 4 and the second brake lever 5 are both provided with a sliding groove 41, and the first brake lever 4 and the second brake lever 5 are both provided with a notch 42 connected to the corresponding sliding groove 41, and the cable 2 can be inserted into the corresponding sliding groove 41 through the notch 42.

[0055] Taking into account that the cable 2 is easily damaged during the process of inserting the cable 2 into the sliding groove 41 through the notch 42, and in order to prevent the cable 2 from sliding out of the sliding groove 41 through the notch 42 during use, the first brake lever 4 and the second brake lever 5 are made of elastic materials such as metal. When the cable 2 is inserted into the sliding groove 41 through the notch 42, the cable 2 applies a thrust to the two sides of the notch 42, so that the two sides of the notch 42 are elastically deformed and maintain a tendency to return to the original position, so that the distance between the two sides of the notch 42 becomes larger, so that the cable 2 can smoothly pass through the notch 42 and enter the sliding groove 41 without deforming the cable 2 itself, thereby reducing the risk of damage to the cable 2 during the insertion process. When the cable 2 is inserted into the sliding groove 41, the cable 2 no longer applies thrust to the two sides of the notch 42, and the two sides of the notch 42 are reset so that the distance between the two sides of the notch 42 becomes smaller, and at this time the distance between the two sides of the notch 42 is smaller than the cross-sectional diameter of the cable 2, thereby reducing the risk of the cable 2 sliding out of the sliding groove 41 through the notch 42 and disengaging from the first brake lever 4 and the second brake lever 5 during use, thereby ensuring the stability of the mechanism.

[0056] In order to facilitate the replacement and installation of the cable 2, a limiting block 21 is fixedly connected to one end of the cable 2 away from the operating member 3. The area of ​​the limiting block 21 on the side close to the first brake lever 4 is larger than the notch area of ​​the sliding groove 41. When the cable 2 is in a tensioned state, the limiting block 21 abuts against the side of the first brake lever 4 away from the second brake lever 5. The cable 2 can apply a thrust to the first brake lever 4 through the limiting block 21, so that the first brake lever 4 drives the first electromagnetic brake disc 7221 to be in a released state to release the electromagnetic brake, without the need to fix one end of the cable 2 to the first brake lever 4, which facilitates the replacement and installation of the cable 2 and improves the convenience of the mechanism installation.

[0057] To facilitate the rotation of the handle 31, the handle 31 is provided with a mounting groove 315, and the cable 2 is slidably connected in the mounting groove 315. The end of the cable 2 away from the first brake lever 4 is fixedly connected to the limiting block 22, and the area of ​​the limiting block 22 close to the handle 31 is larger than the notch area of ​​the mounting groove 315. When the cable 2 is in a tensioned state, the limiting block 22 abuts against the side of the handle 31 away from the limiting rod 1, and the cable 2 can rotate in the mounting groove 315, so that when the handle 31 is rotated so that the limiting rod 1 can be inserted into the limiting groove 311 or the part of the handle 31 located around the notch of the limiting groove 311 can abut against the side of the limiting rod 1 away from the first brake lever 4, the handle 31 can rotate relative to the cable 2, thereby reducing the risk of the cable 2 limiting the rotation of the handle 31 and ensuring the stability of the mechanism.

[0058] The second embodiment of the present application discloses a lawn mower.

[0059] Reference Figure 8A lawn mower includes a frame 7 and a brake release mechanism. A left connecting rod 71 and a right connecting rod 72 are formed integrally on both sides of the frame 7. The left connecting rod 71 close to the second brake rod 5 is used as a limit rod 1, that is, the left connecting rod 71 of the frame 7 can be used as a limit rod 1. The left connecting rod 71 is rotatably connected to a left action wheel 711, and is equipped with a second drive motor 712 for driving the left action wheel 711 to move. The right connecting rod 72 is rotatably connected to a right action wheel 721, and is equipped with a first drive motor 722 for driving the right action wheel 721 to rotate.

[0060] Reference Figure 8 The first electromagnetic brake disc 7221 and the second electromagnetic brake disc 7121 are respectively installed on the opposite sides of the first drive motor 722 and the second drive motor 712. The first electromagnetic brake disc 7221 and the second electromagnetic brake disc 7121 are located between the left connecting rod 71 and the right connecting rod 72. The first brake rod 4 is installed on the first electromagnetic brake disc 7221, and the second brake rod 5 is installed on the second electromagnetic brake disc 7121.

[0061] In another embodiment, the limiting rod 1 is fixedly connected to the frame 7 .

[0062] The implementation principle of a lawn mower in the second embodiment of the present application is as follows:

[0063] The left connecting rod 71 of the frame 7 serves as the limit rod 1, and the first brake rod 4 and the second brake rod 5 are respectively installed on the two electromagnetic brake discs of the frame 7. When the whole vehicle is in a power-off state, the spring in the electromagnetic brake device applies pressure to the electromagnetic brake disc to make the electromagnetic brake disc and the motor abut against each other, that is, the first electromagnetic brake disc 7221 abuts against the first drive motor 722, and the second electromagnetic brake disc 7121 abuts against the second drive motor 712, thereby locking the motor rotors of the first drive motor 722 and the second drive motor 712, so that the left driving wheel 711 and the right driving wheel 721 no longer rotate, thereby realizing the parking brake of the whole vehicle, at which time the cable 2 is in a free state, and the first electromagnetic brake disc 7221 and the second electromagnetic brake disc 7121 are in a locked state to lock the electromagnetic brake. When it is necessary to move the vehicle in a power-off state, the cable 2 is changed from a free state to a tensioned state by operating the operating member 3, so that the first brake lever 4 drives the first electromagnetic brake disc 7221 to move, so that the first electromagnetic brake disc 7221 no longer abuts against the first drive motor 722, that is, the first electromagnetic brake disc 7221 is in a released state to release the electromagnetic brake, and at the same time, the two ends of the sleeve 6 are respectively abutted and cooperated with the limit rod 1 and the second brake rod 5, so that the second brake rod 5 slides toward the direction of the first brake rod 4, so that the second electromagnetic brake disc 7121 no longer abuts against the second drive motor 712, that is, the second electromagnetic brake disc 7121 is in a released state to release the electromagnetic brake. Therefore, by operating the operating member 3, the first electromagnetic brake disc 7221 and the second electromagnetic brake disc 7121 are simultaneously converted to the release state to release the electromagnetic brake, thereby realizing the simultaneous release of the two electromagnetic brakes, so that the motor rotors of the first drive motor 722 and the second drive motor 712 are no longer locked, so that the left action wheel 711 and the right action wheel 721 can rotate relative to the frame 7, that is, the vehicle can be pushed or towed. The operation of simultaneously releasing the two electromagnetic brakes is simple and convenient, which improves the convenience of using the lawn mower, and the overall structure of the release mechanism is simple, which improves the convenience of assembling the lawn mower. At the same time, the cable 2 is used for driving, so that the force application position and direction of the cable 2 are adjustable when the operator operates, without limiting the force application position of the operator to the bottom or inside of the frame 7, which is convenient for the operator to operate and further improves the convenience of using the lawn mower.

[0064] 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. A brake release mechanism, characterized in that: The invention comprises a limit rod, a cable and an operating member, wherein one end of the cable is connected to a first brake rod for driving the first electromagnetic brake disc to move, and the other end passes through the limit rod and is connected to the operating member, the portion of the cable located between the limit rod and the first brake rod is also slidably connected to the second brake rod for driving the second electromagnetic brake disc to move, the portion of the cable located between the limit rod and the second brake rod is sleeved with a sleeve, the cable is slidably connected in the sleeve, and the cable can be made to have a free state and a tensioned state by operating the operating member, when the cable is in the free state, the first electromagnetic brake disc and the second electromagnetic brake disc are in a locked state to lock the electromagnetic brake, when the cable is in a tensioned state, the first brake rod drives the first electromagnetic brake disc to be in a released state to release the electromagnetic brake, and the two ends of the sleeve are respectively abutted and cooperated with the limit rod and the second brake rod to make the second brake rod slide toward the direction of the first brake rod, so that the second electromagnetic brake disc is in a released state to release the electromagnetic brake.

2. A brake release mechanism according to claim 1, characterized in that: The cable is slidably connected to the limit rod, and the operating member is a handle arranged on the cable. By pulling the handle, the cable can be slid to realize the switching of the cable between a free state and a tensioned state.

3. A brake release mechanism according to claim 2, characterized in that: The handle is provided with a limiting groove. When the cable is in a free state, the limiting rod is inserted into the limiting groove to limit the handle from sliding relative to the limiting rod. When the cable is in a tensioned state by pulling and rotating the handle, the portion of the handle located around the notch of the limiting groove abuts against the side of the limiting rod away from the first brake lever.

4. A brake release mechanism according to claim 3, characterized in that: The handle is provided with a gripping portion, and limiting rods are provided at both ends of the gripping portion. The two limiting rods are arranged opposite to each other, and the opposite sides of the two limiting rods and the gripping portion together form an avoidance groove and the limiting groove. The distance between the groove walls on both sides of the avoidance groove is smaller than the distance between the groove walls on both sides of the limiting groove, and the limiting groove is located between the avoidance groove and the limiting rod.

5. A brake release mechanism according to claim 1, characterized in that: The sleeve comprises a first hose and an adjusting sleeve, wherein the adjusting sleeve is provided with an internal thread, and one end of the first hose is provided with an external thread matching the internal thread in the adjusting sleeve and is threadedly connected to the adjusting sleeve.

6. A brake release mechanism according to claim 5, characterized in that: The sleeve also includes a second hose, the first hose and the second hose are connected through the adjustment sleeve and are respectively located at both ends of the adjustment sleeve, one end of the second hose is provided with an external thread adapted to the internal thread in the adjustment sleeve, and is threadedly connected to the adjustment sleeve.

7. A brake release mechanism according to claim 1, characterized in that: Both ends of the sleeve are provided with abutment blocks, and the pull cable is passed through and slidably connected to the abutment blocks.

8. A brake release mechanism according to claim 1, characterized in that: The first brake lever and the second brake lever are both provided with a sliding groove, and the first brake lever and the second brake lever are both provided with a notch connected to the corresponding sliding groove, and the cable can be inserted into the corresponding sliding groove through the notch.

9. A brake release mechanism according to claim 8, characterized in that: A limiting block is provided at one end of the cable away from the operating member. When the cable is in a tensioned state, the limiting block abuts and cooperates with a side of the first brake lever away from the second brake lever.

10. A lawn mower, characterized in that: It includes a frame and a brake release mechanism as described in any one of claims 1 to 9, a part of the frame can be used as the limit rod or the limit rod is set on the frame, a left connecting rod and a right connecting rod are respectively arranged on both sides of the frame, the left connecting rod is provided with a left action wheel and a second driving motor for driving the left action wheel to move, the right connecting rod is provided with a right action wheel and a first driving motor for driving the right action wheel to rotate, a first electromagnetic brake disc and a second electromagnetic brake disc are respectively arranged on the side facing each other of the first driving motor and the second driving motor, the first electromagnetic brake disc and the second electromagnetic brake disc are located between the left connecting rod and the right connecting rod, the first brake rod is arranged on the first electromagnetic brake disc, and the second brake rod is arranged on the second electromagnetic brake disc.

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