Secondary turning step

Abstract

The utility model belongs to heavy truck accessory technical field especially for two -stage turnover step, including frame assembly and setting in the inside of frame assembly's upper pedal assembly and lower pedal assembly, still include: connecting assembly one and connecting assembly two, symmetric setting in the inner wall of frame assembly, the outside of frame assembly is fixed with motor assembly, and motor assembly is connected with connecting assembly one. The utility model, frame assembly is connected through the bracing piece connection of symmetric setting, and motor assembly adopts movable type design, and the upper pedal assembly and lower pedal assembly are recycled through, and recycling limiting piece one and recycling limiting piece two accurate limit, effectively reduce the space occupation of car bottom, and the upper pedal assembly and lower pedal assembly adopt extrusion aluminum profile, and the reserved mounting hole position is convenient for processing, and the upper pedal assembly is connected through support muscle one and support muscle two, and the bolt connection and the edge covering design of reinforcing structural strength of the upper pedal assembly further promote the overall stability of bolt connection and the upper pedal face of limit shaft one.

Description

Technical Field

[0001] This utility model relates to the field of heavy-duty truck parts technology, specifically a two-stage tilting step. Background Technology

[0002] Automotive parts, also known as auto components, auto parts, or auto spare parts, refer to the components that make up the various units of a car and all consumable materials that serve the car. They are characterized by a wide variety of types, complex substitutes, complex identification systems, and rapid price fluctuations.

[0003] In the field of heavy-duty trucks, the two-stage tilting step is an important component for enabling people to get on and off the vehicle. In the existing technology, the two-stage tilting step for heavy-duty trucks has certain limitations in design: due to the limited space in the vehicle, the requirements for the compactness of the motor assembly are extremely high, but the motor assembly of the traditional step device is often difficult to meet the space constraints due to unreasonable structural design; at the same time, the pedal needs to be used as a vehicle panel after being retracted, but it often occupies too much space under the vehicle when retracted, affecting the overall space utilization of the vehicle.

[0004] Therefore, we proposed a two-stage flip step to solve the above problems. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a two-stage flip-up step, which solves the problem mentioned in the background art that due to the limited space in vehicles, the requirements for the compact structure of motor components are extremely high, while the motor components of traditional step devices often fail to meet the space constraints due to unreasonable structural design.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model specifically adopts the following technical solution: A two-stage flip-up step, comprising a frame assembly and an upper pedal assembly and a lower pedal assembly disposed inside the frame assembly, a connecting assembly one, a connecting assembly two, and a motor assembly, characterized in that it further comprises: The frame assembly includes a left side panel, a right side panel, and struts. The left side panel and the right side panel are fixed together by the struts, which are symmetrically arranged and connected to the left side panel and the right side panel by screws. Connecting component one and connecting component two are symmetrically arranged on the inner wall of the frame component. The motor component is fixed on the outer side of the frame component and is connected to connecting component one. The motor assembly includes a fixed plate, a movable plate, a connecting rod, a handle, a tension spring, a drive motor, a motor bracket, a drive gear, a rotating shaft of the movable plate, a first sliding groove, and a second sliding groove. The fixed plate is fixed in a reserved space inside the left side plate. The movable plate is located on the outside of the fixed plate. The drive motor is fixed on the outside of the movable plate. The rotating shaft of the movable plate and the first sliding groove are fixed to the nuts on the second sliding groove. The motor bracket is fixed to the output end of the drive motor, and the other end of the motor bracket is connected to the movable plate. The drive gear meshes with the connecting gear. The connecting rod is fixed to the upper end of the movable plate, and the other end of the connecting rod is fixed to the handle. One end of the tension spring is connected to one end of the handle, and the other end of the tension spring is fixed to the fixed plate.

[0009] Furthermore, a retraction limiting member is fixed at the center of the support rod, and the retraction limiting member is fixed to one side of the upper pedal assembly.

[0010] Furthermore, a support member is fixed at the center of the side of the left side plate, and a second retraction limiting member is fixed on one side of the support member. The other end of the second retraction limiting member is in contact with the inner side of the lower pedal assembly. The external structure of the first retraction limiting member and the second retraction limiting member are consistent.

[0011] Furthermore, the left and right side plates have symmetrically rotating limit blocks inside, and the inner side of the limit blocks is provided with bushings, which are connected to the sides of the upper pedal assembly and the lower pedal assembly.

[0012] Furthermore, the upper pedal assembly includes an upper pedal surface, an injection molded part, a footrest part, a first support rib, a second support rib, a connecting block, positioning bolts, mounting bolts, an upper support plate, a third support rib, and screws. The upper pedal surface is located in the middle of the upper pedal assembly, the footrest part is located at the upper end of the upper pedal assembly, and the injection molded part is located at the lower end of the upper pedal assembly. The sides of the footrest part and the injection molded part are edge-bound. The first support rib is located on the inner side of the left and right sides of the footrest part, the second support rib is located on the inner side of the front side of the footrest part, and the third support rib is located on the inner side of the front end of the injection molded part. The first support rib contacts both sides of the upper pedal surface, and the second and third support ribs are mutually positioned. The mounting bolts are used to fix the connecting block of the upper support plate and the first and second limiting shafts. The positioning bolts are located at the lower ends of the upper pedal surface and the upper support plate and are staggered between the upper pedal surface and the upper support plate. The screws are used for the injection molded part and the footrest part.

[0013] Furthermore, the connecting component one includes a limiting connecting hole, a limiting shaft, an internal hex bolt, a tightening screw, a threaded hole, and a limiting surface. The limiting shaft is located on the inner side of the left side plate and is slidably embedded in the bushing. The limiting connecting hole is opened on the side of the upper pedal assembly and the lower pedal assembly. The internal hex bolt and the tightening screw pass through the limiting shaft and are connected to the limiting connecting hole. The threaded hole is opened on one side of the limiting shaft and a mounting bolt is provided in the threaded hole. The limiting surface is symmetrically arranged on one side of the limiting shaft and is engaged with the limiting block as an extension limit.

[0014] Furthermore, a connecting gear is provided at the other end of the limiting shaft, and a fixing bolt is provided on the outside of the connecting gear, and the fixing bolt passes through the connecting gear and is fixed to the limiting shaft.

[0015] Furthermore, the second connecting component includes a limiting connecting hole, a limiting shaft, two hexagon socket bolts, two tightening screws, two threaded holes, and a limiting surface. The limiting shaft is located on the inner side of the right side plate and is slidably embedded in the bushing. The limiting connecting hole is located on the side of the upper pedal assembly and the lower pedal assembly. The two hexagon socket bolts and the two tightening screws pass through the limiting shaft and are connected to the limiting connecting hole. The two threaded holes are located on one side of the limiting shaft and are fitted with mounting bolts. The two limiting surfaces are symmetrically arranged on one side of the limiting shaft and engage with the limiting block as an extension limit.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, this utility model provides a two-stage flipping step, which has the following beneficial effects: In this invention, the frame assembly is connected by symmetrically arranged support rods, while the motor assembly adopts a movable design. After the upper and lower pedal assemblies are retracted, they are precisely limited by retraction limiters one and two, effectively reducing the space occupied under the vehicle and meeting the space constraints of the vehicle. The upper and lower pedal assemblies are made of extruded aluminum profiles, which facilitates the processing and pre-reservation of installation holes. The upper pedal assembly is strengthened by support ribs one and two, bolt connections, and edge wrapping design. The bolt connection between the limiting shaft one and the upper pedal surface further improves the overall stability and ensures pedaling safety. The motor assembly has a manual return function, which can quickly disengage from the gear transmission and manually retract the pedal in case of motor failure, improving the emergency reliability of the device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the working principle of the two-stage flipping step of this utility model; Figure 2 This is a schematic diagram of the two-stage flip-step recycling of this utility model; Figure 3 This is a top view of the frame component of this utility model; Figure 4 This is a top view of the upper pedal assembly of this utility model; Figure 5 This utility model Figure 4 Schematic diagram of the cross-section at point BB; Figure 6 This is a rear view schematic diagram of the upper pedal assembly of this utility model; Figure 7 For this utility model Figure 6 Schematic diagram of the cross-section at point C; Figure 8 This is a bottom view of the upper pedal assembly of this utility model; Figure 9 This is a top view of the lower pedal assembly of this utility model; Figure 10 This is a top view of the connecting component of this utility model; Figure 11 This is a top view of the second connecting component of this utility model; Figure 12 This is a top view of the motor assembly of this utility model; Figure 13 This is a front view schematic diagram of the motor assembly of this utility model; Figure 14 This is a rear view schematic diagram of the motor assembly of this utility model.

[0019] In the diagram: 1. Frame assembly; 101. Left side plate; 102. Right side plate; 103. Support rod; 104. Recycling limit component one; 105. Support component; 106. Recycling limit component two; 107. Limiting block; 108. Bushing; 2. Upper pedal assembly; 201. Upper pedal surface; 202. Injection molded part; 203. Foot surface component; 204. Support rib one; 205. Support rib two; 206. Connecting block; 207. Positioning bolt; 208. Limiting connection hole; 209. Mounting bolt; 210. Upper support plate; 211. Support rib three; 212. Screw; 3. Lower pedal assembly; 4. Connecting assembly one; 401. Limiting shaft 1. 402. Socket headstock bolt 1; 403. Set screw 1; 404. Threaded hole 1; 405. Limiting surface 1; 406. Connecting gear; 407. Fixing bolt; 5. Connecting assembly 2; 501. Limiting shaft 2; 502. Socket headstock bolt 2; 503. Set screw 2; 504. Threaded hole 2; 505. Limiting surface 2; 6. Motor assembly; 601. Fixing plate; 602. Movable plate; 603. Connecting rod; 604. Handle; 605. Tension spring; 606. Drive motor; 607. Motor bracket; 608. Drive gear; 609. Movable plate rotating shaft; 610. Slide part 1; 611. Slide part 2. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0021] like Figure 1-14 As shown, one embodiment of the present invention proposes a two-stage flip-up step, including a frame assembly 1, an upper pedal assembly 2 and a lower pedal assembly 3 disposed inside the frame assembly 1, and further including: The frame assembly 1 includes a left side plate 101, a right side plate 102, and a support member 103. The left side plate 101 and the right side plate 102 are fixed together by the support member 103, and the support member 103 is symmetrically arranged and connected to the left side plate 101 and the right side plate 102 by screws. The left side plate 101 and the right side plate 102 of the frame assembly 1 are integrally formed by die-cast aluminum alloy and are connected by two symmetrically arranged support members 103. The support member 103 is a hollow steel pipe, and its two ends are fixed to the left side plate 101 and the right side plate 102 by screws to form a rectangular frame structure. The interior of the left side plate 101 and the right side plate 102 are symmetrically rotated by a limiting block 107. The inner side of the limiting block 107 is provided with a bushing 108, and the bushing 108 is connected to the side of the upper pedal assembly 2 and the lower pedal assembly 3. Four motor assembly mounting holes are reserved on the outer side of the left side plate 101, and a support 105 is installed on the inner side. The support 105 is an L-shaped steel plate. Four limiting blocks 107 are symmetrically arranged inside the left side plate 101 and the right side plate 102. The limiting block 107 is a rectangular iron block, and a bushing 108 is installed in the inner shaft hole. The bushing 108 is made of composite material and is used to reduce friction when the pedal assembly rotates. Limiting surface 405 and limiting surface 505 contact the limiting block 107 to limit and support the pedal extension.

[0022] Connecting component 4 and connecting component 5 are symmetrically arranged on the inner wall of frame component 1. Motor component 6 is fixed on the outer side of frame component 1 and is connected to connecting component 4.

[0023] A retraction limiting member 104 is fixed at the center of the support rod 103, and the retraction limiting member 104 is fixed to one side of the upper pedal assembly 2; a support member 105 is fixed at the center of the side of the left side plate 101, and a retraction limiting member 2 106 is fixed to one side of the support member 105, and the other end of the retraction limiting member 2 106 contacts the inner side of the lower pedal assembly 3. The retraction limiting member 104 and the retraction limiting member 2 106 have matching external structures; a retraction limiting member 104 is fixed at the center of the support rod 103 by screws. The retraction limiting member 104 is a rubber block and abuts against one side of the upper pedal assembly 2; a retraction limiting member 2 106 is fixed to one side of the support member 105 by screws. The retraction limiting member 2 106 is also a rubber block and contacts the inner side of the lower pedal assembly 3. The two are matched in shape and respectively limit the retraction position of the upper and lower pedal assemblies. The upper pedal assembly 2 includes an upper pedal surface 201, an injection molded part 202, a footrest part 203, a first support rib 204, a second support rib 205, a connecting block 206, a positioning bolt 207, a mounting bolt 209, an upper support plate 210, a third support rib 211, and screws 212. The upper pedal surface 201 is located in the middle of the upper pedal assembly 2. The footrest part 203 is located at the upper end of the upper pedal assembly 2, and the injection molded part 202 is located at the lower end of the upper pedal assembly 2. The sides of the footrest part 203 and the injection molded part 202 are edge-sealed. The first support rib 204 is located on the inner sides of the left and right sides of the footrest part 203. Support rib 205 is located on the inner front side of the foot pedal surface 203, support rib 3 211 is located on the inner front side of the injection molded part 202, support rib 1 204 contacts both sides of the upper pedal surface 201, support rib 205 and support rib 3 211 are positioned relative to each other, mounting bolt 209 is used to fix the upper support plate 210 connecting block 206 and limiting shaft 1 401 and limiting shaft 2 501, positioning bolt 207 is set at the lower end of the upper pedal surface 201 and the upper support plate 210 and is staggered between the upper pedal surface 201 and the upper support plate 210, screw 212 is used for the injection molded part 202 and the foot pedal surface 203; The upper pedal assembly 2 has an extruded aluminum profile upper pedal surface 201 with a pre-reserved T-slot for installing a connecting block 206 and a positioning bolt 207. The injection molded part 202 is made of ABS material and is located on the upper and lower sides of the upper pedal surface 201, respectively, along with the foot surface part 203. The three parts are connected by a edging design and screws 212. Support rib 1 204 and support rib 205 are made of plastic and are integrally injection molded inside the foot surface part 203. Support rib 3 211 is located inside the front end of the injection molded part 202. The connecting block 206 slides into the upper pedal surface 201. The mounting bolt 209 passes through the connecting block 206 and connects to the upper support plate 210. The positioning bolt 207 is a stainless steel bolt that is staggered and screwed into the pre-reserved holes at the lower ends of the upper pedal surface 201 and the upper support plate 210 for fastening. The surface of the foot surface part 203 has a diamond-shaped anti-slip pattern. The connecting component 4 includes a limiting connection hole 208, a limiting shaft 401, an internal hex bolt 402, a tightening screw 403, a threaded hole 404, and a limiting surface 405. The limiting shaft 401 is located on the inner side of the left side plate 101 and is slidably embedded in the bushing 108. The limiting connection hole 208 is located on the side of the upper pedal assembly 2 and the lower pedal assembly 3. The internal hex bolt 402 and the tightening screw 403 pass through the limiting shaft 401 and are connected to the limiting connection hole 208. The threaded hole 404 is located on one side of the limiting shaft 401 and is provided with a mounting bolt 209. The limiting surface 405 is symmetrically arranged on one side of the limiting shaft 401 and is engaged with the limiting block 107 as a limit for extension. The limiting shaft 401 of the connecting component 4 is a stepped shaft. One end is a flat round shaft, which is embedded in the side profile of the upper pedal assembly 2 and the lower pedal assembly 3, and contacts the connecting block 206. The other end is a round shaft, which passes through the bushing 108 of the left side plate 101. The hex socket head cap screw 402 and the set screw 403 pass through the limiting shaft 401 and are connected to the limiting connection hole 208 on the side of the pedal assembly, fixing the limiting shaft 401 to the pedal assembly. A threaded hole 404 is opened on one side of the limiting shaft 401, through which the connecting block 206 and the mounting... Bolt 209 achieves axial fixation; limiting surface 405 is a plane symmetrically arranged in the middle of limiting shaft 401, which contacts the limiting block 107 and serves as the limiting point when the pedal extends; the other end of limiting shaft 401 is provided with a connecting gear 406, and a fixing bolt 407 is provided on the outside of the connecting gear 406, and the fixing bolt 407 passes through the connecting gear 406 and is fixed to the limiting shaft 401; the connecting gear 406 is a spur gear, which is fixed to the end of limiting shaft 401 by fixing bolt 407 and large flat washer; The second connecting component 5 includes a limiting connecting hole 208, a limiting shaft 501, a hexagon socket bolt 502, a tightening screw 503, a threaded hole 504, and a limiting surface 505. The limiting shaft 501 is located on the inner side of the right side plate 102 and is slidably embedded in the bushing 108. The limiting connecting hole 208 is located on the side of the upper pedal assembly 2 and the lower pedal assembly 3. The hexagon socket bolt 502 and the tightening screw 503 pass through the limiting shaft 501 and are connected to the limiting connecting hole 208. The threaded hole 504 is located on one side of the limiting shaft 501 and is fitted with a mounting bolt 209. Axial fixation is achieved through the connecting block 206 and the mounting bolt 209. The limiting surface 505 is fixed on the other side of the limiting shaft 501 and is engaged with the right side plate 102. The limiting shaft 201 structure of the connecting component 2 5 is symmetrical to the limiting shaft 1 401. Its limiting surface 2 505 contacts the limiting block 107 of the right side plate 102. The internal hex bolt 2 502 and the tightening screw 2 503 fix it to the other side of the pedal assembly, and work together with the connecting component 1 4 to realize the synchronous rotation of the pedal assembly. The motor assembly 6 includes a fixed plate 601, a movable plate 602, a connecting rod 603, a handle 604, a tension spring 605, a drive motor 606, a motor bracket 607, a drive gear 608, a movable plate rotation shaft 609, a first slide rail 610, and a second slide rail 611. The fixed plate 601 is fixed in a pre-reserved space within the left side plate 101. The movable plate 602 is located on the outside of the fixed plate 601. The drive motor 606 is fixed on the outside of the movable plate 602. The movable plate rotation shaft 609 and the first slide rail 610 are fixed to nuts on the second slide rail 611. The motor bracket 607 is fixed to the output end of the drive motor 606, and the other end of the motor bracket 607... One end is connected to the movable plate 602, the drive gear 608 meshes with the connecting gear 406, the connecting rod 603 is fixed to the upper end of the movable plate 602, and the other end of the connecting rod 603 is fixed to the handle 604, one end of the tension spring 605 is connected to one end of the handle 604, and the other end of the tension spring 605 is fixed to the fixed plate 601; the fixed plate 601 of the motor assembly 6 is a bent steel plate, which is fixed to the mounting hole of the left side plate 101 by the motor fixing plate bolts; the movable plate 602 is a stamped steel plate, which is connected to the fixed plate 601 by the movable plate rotating shaft 609 and the nuts on the first slide part 610 and the second slide part 611, and can rotate relative to the fixed plate 601.

[0024] The drive motor 606 is a DC geared motor, which is fixed to the movable plate 602 by bolts. The motor bracket 607 is an L-shaped steel plate, with one end fixed to the output shaft end of the drive motor 606 and the other end fixed to the movable plate 602 by bolts. The drive gear 608 is a spur gear that meshes with the connecting gear 406. The connecting rod 603 is a steel rod, with both ends connected to the movable plate 602 and the handle 604 by pins respectively. The tension spring 605 is a cylindrical helical spring, with one end hooked to the handle 604 and the other end hooked to the hook on the fixed plate 601. When manually returning to the original position, pull out the positioning pin, move the handle 604 downwards, the movable plate 602 rotates around the movable plate rotation axis 609 and slides along the slide groove, the drive gear 608 disengages from the connecting gear 406, and the pedal assembly can be manually rotated to the return position.

[0025] When in use, if the pedal is extended, the drive motor 606 can be started, and the drive gear 608 meshes with the connecting gear 406 to drive the first limiting shaft 401 and the second limiting shaft 501 to rotate, thereby driving the upper pedal assembly 2 and the lower pedal assembly 3 to rotate around the bushing 108 until the first limiting surface 405 and the second limiting surface 505 contact the limiting block 107, and the pedal is extended to the position. If recycling is required, the drive motor 606 can be reversed and the pedal assembly can be rotated in the opposite direction until the upper pedal assembly 2 contacts the recycling limit member 104 and the lower pedal assembly 3 contacts the recycling limit member 206, and the recycling is completed. If manual return is required, or in case of motor failure, remove the positioning pin 612, move the handle 604 to disengage the drive gear 608 from the connecting gear 406, and manually rotate the pedal assembly to the return position.

[0026] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A two-stage flip-up step, comprising a frame assembly (1) and an upper pedal assembly (2) and a lower pedal assembly (3) disposed inside the frame assembly (1), a connecting assembly one (4), a connecting assembly two (5), and a motor assembly (6), characterized in that, Also includes: The frame assembly (1) includes a left side plate (101), a right side plate (102), and a strut (103). The left side plate (101) and the right side plate (102) are fixed together by the strut (103), and the struts (103) are symmetrically arranged and connected to the left side plate (101) and the right side plate (102) by screws. Connecting component one (4) and connecting component two (5) are symmetrically arranged on the inner wall of the frame component (1). The motor component (6) is fixed on the outer side of the frame component (1), and the motor component (6) is connected to the connecting component one (4). The motor assembly (6) includes a fixed plate (601), a movable plate (602), a connecting rod (603), a handle (604), a tension spring (605), a drive motor (606), a motor bracket (607), a drive gear (608), a movable plate rotating shaft (609), a slide rail (610), and a slide rail (611). The fixed plate (601) is fixed in the reserved space inside the left side plate (101). The movable plate (602) is set on the outside of the fixed plate (601). The drive motor (606) is fixed on the outside of the movable plate (602). The movable plate rotating shaft (609) is located on the outside of the fixed plate (601). 09) and the nuts on the first slide (610) and the second slide (611) are fixed together. The motor bracket (607) is fixed to the output end of the drive motor (606), and the other end of the motor bracket (607) is on the movable plate (602). The drive gear (608) meshes with the connecting gear (406). The connecting rod (603) is fixed to the upper end of the movable plate (602), and the other end of the connecting rod (603) is fixed to the handle (604). One end of the tension spring (605) is connected to one end of the handle (604), and the other end of the tension spring (605) is fixed to the fixed plate (601).

2. The two-stage flipping step according to claim 1, characterized in that: The central position of the support rod (103) is fixed with a retraction limiting member (104), and the retraction limiting member (104) is fixed to one side of the upper pedal assembly (2).

3. The two-stage flipping step according to claim 2, characterized in that: A support member (105) is fixed at the center of the side of the left side plate (101). A second retraction limiting member (106) is fixed on one side of the support member (105), and the other end of the second retraction limiting member (106) is in contact with the inner side of the lower pedal assembly (3). The external structure of the first retraction limiting member (104) and the second retraction limiting member (106) are consistent.

4. The two-stage flipping step according to claim 3, characterized in that: The left side plate (101) and the right side plate (102) are symmetrically rotated with a limiting block (107). A bushing (108) is provided on the inner side of the limiting block (107), and the bushing (108) is connected to the side of the upper pedal assembly (2) and the lower pedal assembly (3).

5. The two-stage flip-over step according to claim 3, characterized in that: The upper pedal assembly (2) includes an upper pedal surface (201), an injection molded part (202), a footrest part (203), a first support rib (204), a second support rib (205), a connecting block (206), a positioning bolt (207), a mounting bolt (209), an upper support plate (210), a third support rib (211), and screws (212). The upper pedal surface (201) is located in the middle of the upper pedal assembly (2). The footrest part (203) is located at the upper end of the upper pedal assembly (2), and the injection molded part (202) is located at the lower end of the upper pedal assembly (2). The footrest part (203) and the side of the injection molded part (202) are edge-sealed. The first support rib (204) is located on the left and right sides of the footrest part (203). Inside, support rib 2 (205) is located on the front inner side of the foot pedal surface (203), support rib 3 (211) is located on the front inner side of the injection molded part (202), support rib 1 (204) is in contact with both sides of the upper pedal surface (201), support rib 2 (205) and support rib 3 (211) are positioned to each other, mounting bolts (209) are used to fix the upper support plate (210) connecting block (206) and limiting shaft 1 (401) and limiting shaft 2 (501), positioning bolts (207) are set at the lower ends of the upper pedal surface (201) and the upper support plate (210) and are staggered between the upper pedal surface (201) and the upper support plate (210), and screws (212) are used for the injection molded part (202) and the foot pedal surface (203).

6. The two-stage flipping step according to claim 3, characterized in that: The connecting component 1 (4) includes a limiting connecting hole (208), a limiting shaft 1 (401), an internal hex bolt 1 (402), a tightening screw 1 (403), a threaded hole 1 (404), and a limiting surface 1 (405). The limiting shaft 1 (401) is located on the inner side of the left side plate (101), and the limiting shaft 1 (401) is slidably embedded in the bushing (108). The limiting connecting hole (208) is opened on the side of the upper pedal assembly (2) and the lower pedal assembly (3). Furthermore, the internal hex bolt (402) and the tightening screw (403) pass through the limiting shaft (401) and are connected to the limiting connection hole (208). The threaded hole (404) is opened on one side of the limiting shaft (401), and the mounting bolt (209) is provided in the threaded hole (404). The limiting surface (405) is symmetrically arranged on one side of the limiting shaft (401), and the limiting surface (405) is engaged with the limiting block (107) as an extension limit.

7. The two-stage flipping step according to claim 6, characterized in that: The other end of the limiting shaft (401) is provided with a connecting gear (406), and a fixing bolt (407) is provided on the outside of the connecting gear (406), and the fixing bolt (407) passes through the connecting gear (406) and is fixed to the limiting shaft (401).

8. The two-stage flipping step according to claim 1, characterized in that: The second connecting component (5) includes a limiting connecting hole (208), a limiting shaft (501), a hexagon socket bolt (502), a tightening screw (503), a threaded hole (504), and a limiting surface (505). The limiting shaft (501) is located on the inner side of the right side plate (102) and slides into the bushing (108). The limiting connecting hole (208) is located on the side of the upper pedal assembly (2) and the lower pedal assembly (3). Furthermore, the second hexagonal bolt (502) and the second tightening screw (503) pass through the second limiting shaft (501) and are connected to the limiting connection hole (208). The second threaded hole (504) is opened on one side of the second limiting shaft (501), and the second threaded hole (504) is provided with a mounting bolt (209). The second limiting surface (505) is symmetrically arranged on one side of the second limiting shaft (501), and the second limiting surface (505) is engaged with the limiting block (107) as an extension limit.

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