Foldable labor-saving main standing frame of motorcycle

Abstract

The foldable labor-saving main standing frame comprises a main standing frame body, the main standing frame body comprises a first supporting rod and a second supporting rod which are located on the left side and the right side, a pedal rod seat is arranged at the lower end of the first supporting rod, a connecting structure is arranged at the other end of the pedal rod seat, and the pedal rod seat is connected with a pedal rod in a matched mode through the connecting structure; the pedal rod rotates within a set angle range in the height direction of the first supporting rod; a spring is arranged between the pedal rod and the first supporting rod. The pedal rod can be folded after being rotated, so that the length is shortened; the maximum length of the pedal rod in the folded state is reduced, so that the structural arrangement around the main bracket is facilitated; in an extension state, the length of the main force arm is increased when the main bracket is supported, so that more labor is saved when the main bracket is supported; the force bearing point between the pedal rod and the main standing frame is changed to the position where the third matching face abuts against the first matching face, and the better labor-saving effect is achieved.

Description

Technical Field

[0001] The invention relates to the field of motorcycle accessory parts, in particular to a foldable labor-saving main stand frame of a motorcycle. Background Art

[0002] As motorcycles develop towards more functions and larger displacement, the overall weight of motorcycles is also increasing rapidly; in order to meet the needs of parking, motorcycles are equipped with a main stand to support the vehicle when parking. When parking, the rear wheel of the motorcycle is usually suspended in the air through the main stand. The left and right legs of the main stand form a triangular structure with the front wheel to support the motorcycle. When the motorcycle is parked, the driver pushes the main stand to move by stepping on the pedal rod. While holding the motorcycle with force, the whole vehicle is driven upward and backward by installing a cross tube (as a rotating shaft) with the supporting foot as the center of the circle, thereby supporting the whole vehicle and causing the rear wheel of the motorcycle to be lifted and suspended in the air. In order to meet the requirements of supporting heavier motorcycles, a longer pedal rod is required to overcome the weight of the motorcycle itself or the driver needs to exert more labor to push the motorcycle to follow the movement of the main stand, which makes it very strenuous for motorcycles with slightly larger displacement, and very strenuous and difficult for drivers with poor physical strength to operate.

[0003] In the prior art, for example, Chinese utility model patent CN2794988Y discloses an "improved structure of a two-legged bicycle support frame for motorcycles and electric bicycles", which comprises a two-legged support seat with a rotating shaft hole at the top, a support seat on one side with a pedal support foot, and the pedal support foot is arranged at the root of a support rod on one side of the support seat, and the two-legged support seat and the support foot are bent and stamped at one time; its technical effect is: the pedal support foot is arranged at the root of the support seat, and compared with the prior art, its fulcrum is moved from the upper distance of the support seat to the root, and according to the principle of lever, the distance from the fulcrum to the force point becomes larger, which is more labor-saving, and the user only needs to apply a small force to the bottom plate at the support foot, gently lift the vehicle, and then the vehicle support frame of the vehicle can be put down and the vehicle body can be propped up; however, in this structure, since the support foot and the support seat are hard-connected (welded and with reinforcing ribs), although the labor-saving effect can be achieved by changing the fulcrum position, the turning radius required for rotation limits the length of the support foot, resulting in limited labor-saving effect, and parking operation is still inconvenient.

[0004] In order to support heavier motorcycles through the main stand, it is necessary to lengthen the length of the main stand frame's foot pedal rod to increase the length of the main stand frame's main power arm; if the length of the foot pedal rod is directly lengthened, when the main stand frame is in the raised state, there is a risk that the foot pedal portion of the foot pedal rod will contact the ground and affect the parking stability. At this time, it is necessary to raise the position of the foot pedal portion along the support rod; the increase in the position of the foot pedal portion will also reduce the length of the main power arm in the critical state of the main stand frame's support, so that the main stand can be supported more stably. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a foldable and labor-saving main stand frame for a motorcycle, so as to solve the contradiction between the lengths of the main force arms when the above-mentioned main stand frame is erected, so as to make the main stand frame labor-saving; the second purpose is to adopt a foldable structure to shorten the length of the footrest rod, so as to facilitate the associated styling design of the whole vehicle. In order to solve the above technical problems, the present invention adopts the following technical solutions: A foldable, labor-saving main stand frame for a motorcycle comprises a main stand frame body, wherein the main stand frame body comprises a first support rod and a second support rod located on left and right sides, and is characterized in that a pedal rod seat is provided at the lower end of the first support rod, and a connecting structure is provided at the other end of the pedal rod seat, which is connected to the pedal rod through the connecting structure so that the pedal rod can rotate within a set angle range along the height direction of the first support rod; a spring is provided between the pedal rod and the first support rod to generate a spring force.

[0006] In this way, the pedal rod of the present invention can be rotated to form a folded shape and shortened in length; when the pedal rod of the main bracket is in a folded state, the maximum length of the pedal rod is reduced, which is beneficial to the structural arrangement around the main bracket and avoids the influence of the overly long pedal rod on the surrounding structure; when the pedal rod of the main bracket is in an extended state, the length of the main power arm when the main bracket is supported is increased, making it more labor-saving to support the main bracket. In addition, the present invention can change the force point between the pedal rod and the main stand frame, and change the force point to the position when the third matching surface is tightly against the first matching surface, and through the lever effect, it has a better labor-saving effect.

[0007] Furthermore, the connection structure of the pedal rod seat is provided with a central connection block on the pedal rod seat, the central connection block is provided with a pin hole, the left and right sides of the central block are grooves, and the walls of the grooves form a first mating surface; an embedding groove is provided in the middle part of the connection end of the pedal rod, and a rotating pin hole is provided along the diameter direction, when connecting, the central connection block is inserted into the embedding groove, the pin hole and the rotating pin hole are directly opposite and connected, and the rotating pin is inserted into the pin hole and the rotating pin hole to rotatably connect the pedal rod to this end of the pedal rod seat; The pedal rod and the corresponding parts of the first matching surfaces of the grooves on the left and right sides of the central block are provided with a second matching surface and a third matching surface, and the second matching surface and the third matching surface meet to form an obtuse angle.

[0008] Furthermore, when a downward force is applied, the pedal rod rotates downward around the swing pin, and when the third mating surface located on the lower side is rotated to abut against the first mating surface, the pedal rod is restricted from continuing to rotate downward. At this time, the foot pedal portion provides force to rotate the entire main stand frame and thereby support the vehicle; when the downward force is cancelled, the pedal rod rotates upward around the swing pin under the action of the spring, and when the second mating surface located on the upper side is rotated to abut against the first mating surface, the pedal rod is restricted from continuing to rotate upward. At this time, the pedal rod is in a folded state with a shortened length.

[0009] Furthermore, it also includes a connecting portion located at the upper part, and the first support rod and the second support rod are respectively arranged on the left and right sides of the connecting portion.

[0010] Furthermore, the pedal rod has a rotation angle range of 10° to 30° around the rotation pin.

[0011] Furthermore, the connection structure of the pedal rod seat is provided with a first connection block and a connection groove opposite to the first connection block on the pedal rod seat, the wall of the connection groove forms a first mating surface, and a pin hole is provided along the diameter direction of the first connection block; a second connection block and a mating groove are provided at the connection end of the pedal rod for mating connection, and a rotation pin hole is provided on the second connection block along the diameter direction; when the pedal rod seat is matingly connected with the pedal rod, the first connection block is placed in the mating groove, the second connection block is placed in the connection groove, and the pin hole is correspondingly connected with the rotation pin hole, and the rotation pin is inserted to form a rotatable connection structure; A second mating surface and a third mating surface are arranged on the end surface of the pedal rod corresponding to the first mating surface, and the second mating surface and the third mating surface intersect to form an obtuse angle greater than 90 degrees and less than 180 degrees.

[0012] Furthermore, the pedal rod can rotate in a height direction of the first support rod within a range of 10° to 30°.

[0013] Furthermore, the first support rod and the second support rod are both provided with support feet.

[0014] Furthermore, the support foot is a U-shaped groove, which is connected to the bottom ends of the first support rod and the second support rod by welding.

[0015] Furthermore, after the pedal rod seat is connected with the pedal rod, a fitting surface is formed between the first connecting block and the second connecting block, and the fitting surface is a smooth surface.

[0016] Compared with the prior art, the foldable labor-saving main stand of the motorcycle of the present invention has the following beneficial effects: 1. The pedal rod of the present invention can be rotated to form a folded state and shortened in length; when the pedal rod of the main bracket is in a folded state, the maximum length of the pedal rod is reduced, which is beneficial to the structural arrangement around the main bracket and avoids the influence of an excessively long pedal rod on the surrounding structure; 2. When the pedal rod of the main bracket is in the extended state, the length of the main power arm when the main bracket is supported increases, making it more labor-saving when supporting the main bracket; 3. The pedal rod of the present invention uses the swivel pin as the rotation center. In addition to increasing the length of the main force arm, it can also change the force point between the pedal rod and the main stand frame, and change the force point to the position where the third matching surface is tightly pressed against the first matching surface. Through the lever effect, it has a better labor-saving effect.

[0017] 4. The pedal rod of the present invention has the swing pin as its rotation center. When a downward force is applied, the pedal rod rotates downward around the swing pin. When the third mating surface located on the lower side is rotated to abut against the first mating surface, the pedal rod is restricted from further downward rotation. In this way, by setting different rotation angles when the third mating surface is in abutment with the first mating surface, when the rotating third mating surface is in abutment with the first mating surface (force point), since the fixed first mating surface is basically in a vertical state, the lower end of the third mating surface must be in an upward rotation state relative to the center line of the swing pin, and the vertical upward component force generated by the applied downward force at the force point is larger. In addition, the downward inclination angle of the pedal rod is larger, the torque of the vertical upward component force is larger, it is easier to lift the rear wheel of the vehicle, and the labor-saving effect is more obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the main station frame of the present invention; Figure 2 for Figure 1 A partial enlarged structural diagram of the connection between the pedal rod and the pedal rod seat; Figure 3 for Figure 2 A top view of Figure 4 It is a schematic diagram of the pedal rod in a rotating state; Figure 5 It is a schematic diagram of a second embodiment of the connection structure between the pedal rod and the pedal rod seat of the present invention; Figure 6 It is a schematic diagram of the use status of the main stand frame and the motorcycle of the present invention.

[0019] In the figure: main stand frame body -1, connecting part -2, mounting cross tube -21, clamping part -22, first support rod -3, second support rod -4, supporting foot -5, pedal rod -6, pedal part -7, pedal rod seat -10, central connecting block -11, pin hole -12, groove -13, first matching surface -14, embedded groove -15, turn pin hole -16, turn pin -17, vertex -18, second matching surface -19, third matching surface -20, spring -25, spring hanging pin -26, first connecting block -31, pin hole -32, connecting groove -33, first matching surface -34, second connecting block -35, matching groove -36, turn pin hole -37, vertex -38, second matching surface -39, third matching surface -40, fitting surface -41. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0021] It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In the description of the present invention, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invention product is usually placed when used, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In addition, the terms "horizontal", "vertical", etc. do not mean that the components are absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted. In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] like Figure 2-Figure 4As shown, a foldable labor-saving main stand frame of a motorcycle includes a main stand frame body 1, wherein the main stand frame body 1 includes a connecting portion 2 located at the upper portion, which is connected to a corresponding portion of a motorcycle through the connecting portion 2, and the connecting portion 2 includes a mounting cross tube 21 and a clamping portion 22, and also includes a first support rod 3 and a second support rod 4 respectively arranged on the left and right sides, wherein the upper ends of the first support rod 3 and the second support rod 4 arranged outwardly to form an "eight" shape are connected to the lower end of the connecting portion 2; the bottom ends of the first support rod 3 and the second support rod 4 are both provided with supporting feet 5 , the support foot 5 is a U-shaped groove, as shown in the figure, it is connected to the bottom end of the first support rod 3 and the second support rod 4 by welding, forming a stable structure that contacts and supports the ground when parking; it also includes a pedal rod 6, which is fastened to the lower part of the first support rod 3 or the second support rod 4, and is connected to the lower part of the first support rod 3 as shown in the figure. At the tail end of the pedal rod 6, a pedal part 7 is provided. When parking, the driver steps on the pedal part 7 downward with his foot, and drives the connected first support rod 3 to rotate through the pedal rod 6. Finally, the support feet 5 at the bottom ends of the first support rod 3 and the second support rod 4 are respectively supported on the ground, so that the rear wheels of the vehicle are suspended, and the front wheels of the vehicle form a triangular relationship with the support feet 5 of the first support rod 3 and the support feet 5 of the second support rod 4, forming a relatively stable force-bearing structure, so that the vehicle enters a static state of parking. The first support rod 3 and the second support rod 4 can be a whole, that is, formed by bending a round tube or a round rod. The above is the structure of the main station frame of the prior art, and no further description is given here.

[0023] The improvement of the present invention is that a pedal rod seat 10 is arranged on the first support rod 3 or the second support rod 4, one end of the pedal rod seat 10 is connected to the lower end of the first support rod 3 or the second support rod 4, as shown in the figure, one end of the pedal rod seat 10 is connected to the first support rod 3, and the other end is provided with a connecting structure, which is connected with the pedal rod 6 through the connecting structure, so that the pedal rod 6 rotates around the connecting structure in the height direction within a set angle range, as shown in the figure, it rotates along the height direction (axial direction) of the first support rod 3 within a set angle range; the pedal rod 6 rotates around the connecting portion of the first support rod 3 to form a fold and shorten the length. A spring 25 is arranged between the pedal rod 6 and the first support rod 3 to generate a spring force so that the pedal rod 6 can automatically return to its original position after being stepped on downward. A spring hanging pin 26 is arranged on the pedal rod 6 and the first support rod 3, respectively, and the two ends of the spring 25 are respectively arranged on the spring hanging pin 26 and connected.

[0024] The connection structure of the pedal rod seat 10 of the present invention can have various specific structures, such as Figure 2 , 34 is a first embodiment structure, the pedal rod seat 10 is provided with a connection structure of the connection end of the pedal rod 6, a central connection block 11 is provided at the connection end of the pedal rod seat 10, a pin hole 12 is provided on the central connection block 11, the left and right sides of the central connection block 11 are grooves 13, the wall of the groove 13 forms a first matching surface 14, the first matching surface 14 shown in the figure is a straight line segment, and the position as shown in the figure is a vertical straight line segment after installation; the pedal rod seat 10 is provided with a connection end of the central connection block 11 to cooperate with the pedal rod 6, the middle part of the connection end of the pedal rod 6 is provided with an embedding groove 15, the embedding groove 15 can be a U-shaped groove, and a rotating pin hole 16 is provided along the diameter direction, when connected, the central connection block 11 is inserted into the embedding groove 15, the pin hole 12 is directly opposite to the rotating pin hole 16 and is connected, the rotating pin 17 is inserted into the pin hole 12 and the rotating pin hole 16, and the pedal rod 6 is rotatably connected to this end of the pedal rod seat 10.

[0025] The present invention divides the pedal rod of the prior art into two sections. One section is the pedal rod seat 10 which is fixedly connected to the first support rod 3 and is a fixed section. The other section is the pedal rod 6 which is movably connected to the pedal rod seat 10 .

[0026] The connecting end of the pedal rod 6 and the pedal rod seat 10, the corresponding part of the first matching surface 14 of the groove 13 on the left and right sides of the center block 11, its end surface shape is not a plane formed by a straight line, and a second matching surface 19 and a third matching surface 20 are provided. The second matching surface 19 and the third matching surface 20 intersect (or the extension lines intersect) to form an obtuse angle greater than 90 degrees and less than 180 degrees; as shown in the figure, the second matching surface 19 and the third matching surface 20 intersect to form a vertex 18, and the two sides of the vertex 18 are respectively the second matching surface 19 and the third matching surface 20; in this way, when the pedal rod 6 rotates around the rotating pin 17, the distance from the pin hole 12 to the first matching surface 14 and the top of the pedal rod 6 are pre-designed and adjusted. The distance between the point 18 and the first mating surface 14 is such that when the driver applies a downward force (such as stepping on the pedal portion 7 of the pedal rod 6), the pedal rod 6 rotates downward around the rotation pin 17, and when the third mating surface 20 located on the lower side is tightly against the first mating surface 14, the pedal rod 6 is restricted from further rotating downward; similarly, when the downward force disappears and is no longer subjected to the downward force, the pedal rod 6 is subjected to the elastic force of the spring 25 and rotates upward around the rotation pin 17, and when the second mating surface 19 located on the upper side is tightly against the first mating surface 14, the pedal rod 6 is restricted from further rotating upward; the present invention is designed to make the rotation angle range of the pedal rod 6 around the rotation pin 17 be 10º-30º. In this way, the pedal rod 6 of the present invention can be folded and shortened when it is rotated upward, which is convenient for the overall layout of the vehicle; when the pedal rod 6 is rotated downward, it can extend the force arm and save effort, so that the length of the pedal rod 6 can be shortened accordingly. At the same time, the pedal rod 6 serves as a movable section and has two limit structures for upward and downward rotation between the pedal rod and the fixed pedal rod seat 10, which can control the maximum extended position and the maximum folded position of the pedal rod 6, ensuring that the pedal rod 6 can only rotate between the positions limited by the set rotation angle range.

[0027] The rotatable foot pedal rod 6 of the present invention rotates around the center line of the swing pin 17, and can also change the force point between the foot pedal rod 6 and the main stand frame during rotation, and change the force point to the position when the third mating surface 20 is tightly against the first mating surface 14. Compared with the prior art where the force point is usually at the connection point between the foot pedal rod 6 and the first support rod 3, it achieves a better labor-saving effect through the lever effect.

[0028] like Figure 5As shown, a second embodiment of the present invention in which the pedal rod seat 10 is connected to the pedal rod 6 in cooperation with each other, in the connection structure of the connection end of the pedal rod seat 10 and the pedal rod 6 in cooperation with each other, a first connection block 31 and a connection groove 33 opposite to the first connection block 31 are provided at the connection end of the pedal rod seat 10, the wall of the connection groove 33 forms a first matching surface 34, and a pin hole 32 is provided along the diameter direction of the first connection block 31; a second connection block 35 and a matching groove 36 are provided at the connection end in cooperation with the pedal rod 6, and a rotation pin hole 37 is provided on the second connection block 35 along the diameter direction; when the pedal rod seat 10 is connected to the pedal rod 6 in cooperation with each other, the first connection block 31 is placed in the matching groove 36, the second connection block 35 is placed in the connection groove 33, and the pin hole 32 is aligned with the rotation pin hole 37. The pin holes 37 are connected to each other, and the rotating pin 17 is inserted into the through hole to form a rotatable connection structure; a second mating surface 39 and a third mating surface 40 are set on the end surface of the pedal rod 6 corresponding to the first mating surface 34, and the end surface shape is not a plane formed by a straight line. The second mating surface 39 and the third mating surface 40 intersect (or the extended lines intersect) at the vertex 38, and the two sides of the vertex 38 are the second mating surface 39 and the third mating surface 40 respectively. The second mating surface 39 and the third mating surface 40 intersect to form an obtuse angle greater than 90 degrees and less than 180 degrees; in the figure, after the pedal rod seat 10 is mated and connected with the pedal rod 6, a fitting surface 41 is formed between the first connecting block 31 and the second connecting block 35 of the two, and the fitting surface 41 is a smooth surface to facilitate the rotation of the pedal rod 6.

[0029] When the driver steps on the foot pedal portion 7 of the foot pedal rod 6 downward, the foot pedal rod 6 rotates downward around the swing pin 17, and when it rotates to the point where the third mating surface 40 located on the lower side abuts against the first mating surface 34, the foot pedal rod 6 is restricted from further rotating downward; at this time, force continues to be provided to the foot pedal portion to rotate the entire main stand frame and thereby support the vehicle; similarly, when no longer subjected to the downward force, the foot pedal rod 6 is subjected to the elastic force of the spring 25 and rotates upward around the swing pin 17, and when it rotates to the point where the second mating surface 39 located on the upper side abuts against the first mating surface 34, the foot pedal rod 6 is restricted from further rotating upward; through design, the present invention enables the foot pedal rod 6 to rotate in the height direction of the first support rod 3 (rotate around the swing pin 17) in an angle range of 10º-30º.

[0030] The spring 25 is connected by a spring hanging pin 26, which limits the pedal rod 6 to a designed rotation angle range, thereby preventing the pedal rod 6 from making abnormal noise due to vibration during the driving of the whole vehicle.

[0031] During the raising process of the motorcycle using the main stand frame of the present invention, the center of gravity of the whole vehicle undergoes an upward and backward acceleration process relative to the main stand frame support legs; the foldable (collapsible) labor-saving main stand of the present invention, during the raising process of the main stand, when the pedal rod touches the ground, the instantaneous upward and backward acceleration of the whole vehicle is utilized to enable the main stand to completely raise the whole vehicle; the main stand has the effects of saving labor and facilitating operation when raising the motorcycle.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the technical solution. Those skilled in the art should understand that those modifications or equivalent substitutions of the technical solution of the present invention that do not depart from the purpose and scope of the technical solution should be included in the scope of the claims of the present invention.

Claims

1. A foldable, labor-saving main stand frame for a motorcycle, comprising a main stand frame body (1), wherein the main stand frame body (1) comprises a first support rod (3) and a second support rod (4) located on left and right sides, characterized in that: A pedal rod seat (10) is provided at the lower end of the first support rod (3), and a connecting structure is provided at the other end of the pedal rod seat (10), which is connected to the pedal rod (6) through the connecting structure, so that the pedal rod (6) can rotate within a set angle range along the height direction of the first support rod (3); A spring (25) is provided between the pedal rod (6) and the first support rod (3) to generate a spring force.

2. The foldable labor-saving main stand for a motorcycle according to claim 1, characterized in that: The connection structure of the pedal rod seat (10) comprises a central connection block (11) provided on the pedal rod seat (10), a pin hole (12) provided on the central connection block (11), grooves (13) on the left and right sides of the central block (11), and a wall of the groove (13) forming a first mating surface (14); A groove (15) is provided at the middle part of the connecting end of the pedal rod (6), and a rotating pin hole (16) is provided along the diameter direction. When connected, the central connecting block (11) is inserted into the groove (15), the pin hole (12) and the rotating pin hole (16) are directly opposite and connected, and the rotating pin (17) is inserted into the pin hole (12) and the rotating pin hole (16) to rotatably connect the pedal rod (6) to this end of the pedal rod seat (10); A second mating surface (19) and a third mating surface (20) are provided at the corresponding parts of the pedal rod (6) and the first mating surface (14) on the left and right sides of the central block (11), and the second mating surface (19) and the third mating surface (20) intersect to form an obtuse angle.

3. The foldable labor-saving main stand for a motorcycle according to claim 2, characterized in that: When a downward force is applied, the pedal rod (6) rotates downward around the rotating pin (17), and when the third mating surface (20) located on the lower side is tightly abutted against the first mating surface (14), the pedal rod (6) is restricted from further rotating downward; when the downward force disappears, under the action of the spring (25), the pedal rod (6) rotates upward around the rotating pin (17), and when the second mating surface (19) located on the upper side is tightly abutted against the first mating surface (14), the pedal rod (6) is restricted from further rotating upward.

4. The foldable labor-saving main stand for a motorcycle according to claim 1, characterized in that: It also comprises a connecting portion (2) located at the upper portion, wherein the first supporting rod (3) and the second supporting rod (4) are respectively arranged on the left and right sides of the connecting portion (2).

5. The foldable labor-saving main stand for a motorcycle according to any one of claims 1 to 4, characterized in that: The pedal rod (6) rotates along the first support rod (3) in the height direction within an angle range of 10° to 30°.

6. The foldable labor-saving main stand for a motorcycle according to claim 1, characterized in that: The connection structure of the pedal rod seat (10) is as follows: a first connection block (31) and a connection groove (33) opposite to the first connection block (31) are arranged on the pedal rod seat (10); the wall of the connection groove (33) forms a first mating surface (34); a pin hole (32) is arranged along the diameter direction of the first connection block (31); a second connection block (35) and a mating groove (36) are arranged at the connection end for mating connection with the pedal rod (6); a rotation pin hole (37) is arranged on the second connection block (35) along the diameter direction; when the pedal rod seat (10) is matingly connected with the pedal rod (6), the first connection block (31) is placed in the mating groove (36), the second connection block (35) is placed in the connection groove (33), the pin hole (32) is correspondingly connected with the rotation pin hole (37), and the rotation pin (17) is inserted to form a rotatable connection structure; A second mating surface (39) and a third mating surface (40) are provided on the end surface of the pedal rod (6) corresponding to the first mating surface (34), and the second mating surface (39) and the third mating surface (40) intersect to form an obtuse angle.

7. The foldable labor-saving main stand for a motorcycle according to claim 6, characterized in that: The pedal rod (6) rotates in a height direction of the first support rod (3) within an angle range of 10° to 30°.

8. The foldable labor-saving main stand for a motorcycle according to any one of claims 1 to 4, characterized in that: Support feet (5) are provided at the ends of the first support rod (3) and the second support rod (4).

9. The foldable labor-saving main stand for a motorcycle according to claim 8, characterized in that: The support foot (5) is a U-shaped groove, connected to the bottom ends of the first support rod (3) and the second support rod (4) by welding.

10. The foldable labor-saving main stand for a motorcycle according to claim 6 or 7, characterized in that: After the pedal rod seat (10) and the pedal rod (6) are connected in a cooperative manner, a fitting surface (41) is formed between the first connecting block (31) and the second connecting block (35), and the fitting surface (41) is a smooth surface.

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