A reduction gearbox for a pedal motor

Abstract

The utility model discloses a kind of reduction gearbox of pedal motor, including reduction gearbox box, end cover, screw hole, mounting hole and locking mechanism, end cover is connected on reduction gearbox box by locking mechanism, screw hole is set on reduction gearbox box.In the utility model, by setting locking mechanism, then by transmission shaft rotation is driven to docking seat, and when docking seat rotates, one of lock rod is stressed to the direction of the slip of another lock rod, the limit disc is rotated synchronously under the action of docking seat to screw rod at this time, the locking and separation of reduction gearbox box and end cover are realized, since screw rod can only be driven rotation by transmission shaft to realize installation, and itself cannot reverse transmission shaft rotation, even in the high-frequency vibration environment of long-term driving of automobile, screw rod also cannot appear reverse loosening due to continuous alternating load, eliminate the hidden danger that the gap of reduction gearbox box and end cover is generated due to bolt loosening from structure.

Description

Technical Field

[0001] This utility model relates to a pedal motor, specifically a gearbox for a pedal motor, and belongs to the field of pedal motor technology. Background Technology

[0002] The gearbox of an automotive pedal motor is a mechanical component in an automotive electronic pedal system (such as the electric auxiliary mechanism of the accelerator pedal and brake pedal) used to house and protect the reduction mechanism. It is usually made of metal (such as aluminum alloy or cast iron) or high-strength engineering plastics. Internally, it integrates gear sets, bearings and other reduction transmission parts. Externally, it is connected to the pedal motor, pedal arm and other components through bolts and other structures to form a complete power transmission link.

[0003] However, most existing gearboxes have various problems. For example, in the split-type gearbox disclosed in announcement number CN208024821U, although the product process is simple, the product quality is stable, and the production efficiency is high, the reliability of the connection between the end cover and the gearbox directly affects the sealing performance, power transmission efficiency, and overall service life of the reduction mechanism in this technical solution and most current gearboxes. In the prior art, the connection between the gearbox and the end cover is mostly achieved by bolt fastening, that is, by setting bolt holes at corresponding positions on the end cover and the gearbox, and using the axial preload of the bolts to achieve a rigid connection between the two. This bolted connection method has significant drawbacks during long-term vehicle operation. For example, when a car is in motion, the pedal motor and gearbox are constantly in a vibrating environment, such as engine vibration and road bumps. Continuous alternating loads cause the friction between the bolt and the threaded hole to gradually decrease. Especially under high-frequency vibration conditions, the bolt is prone to loosening or even falling off. After the bolts loosen, they need to be checked and retightened regularly. However, the installation space for the car pedal system is often narrow, making maintenance difficult. If the loosening is not detected in time, it may cause relative displacement between the end cover and the gearbox, resulting in abnormal gear meshing, which in turn leads to the scrapping of the reduction mechanism, increasing maintenance costs and safety hazards. Utility Model Content

[0004] This utility model provides a significantly different solution to the problem of overly simplistic existing technical solutions. Specifically, the purpose of this utility model is to address the aforementioned shortcomings in the existing technology by proposing a gearbox for a pedal motor.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A gearbox housing for a pedal motor includes a gearbox housing, an end cover, a screw hole, a mounting hole, and a locking mechanism. The end cover is connected to the gearbox housing via the locking mechanism. The screw hole is located on the gearbox housing, and the mounting hole is located through the end cover. The locking mechanism includes a threaded rod, a bearing plate, and a limiting transmission unit. The threaded rod is coaxially rotatably connected to one side of the bearing plate, and the threaded rod passes through the mounting hole and is threaded into the threaded hole. The bearing plate abuts against the end cover, and the diameter of the bearing plate is larger than the mounting hole. The limiting transmission unit includes a limiting disc and a transmission shaft. The bearing tray has a cavity. The limiting disc is coaxially fixed to one end of the threaded rod and rotatably connected in the cavity. The transmission shaft is rotatably connected to the other side of the bearing tray and is located on the same axis as the limiting disc, and is rotatably connected to the limiting disc.

[0006] As a further embodiment of this utility model: the limiting transmission unit further includes a docking seat, a locking rod, and an abutment surface. The docking seat is fixed on the transmission shaft, and an inverted block is provided on the docking seat. The inverted block is located at the edge of the limiting disc, and the locking rod is slidably engaged in the inverted block. The abutment surface is provided at the edge of the limiting disc, and the locking rod slidably abuts against the abutment surface.

[0007] As a further embodiment of this utility model: the abutting surface is composed of two inclined surfaces forming an integral structure, and the two inclined surfaces are arranged opposite each other to form a pointed cone shape. At least two locking rods are provided, and the two locking rods abut against the two inclined surfaces respectively, and are located on both sides of the mating seat.

[0008] As a further improvement of this utility model: a groove is provided at the center of the side wall of the lock rod, and springs are engaged in the grooves of two adjacent lock rods.

[0009] As a further improvement of this utility model: a drive rod is fixed at the center of the transmission shaft, one end of the drive rod is located outside the bearing tray, and a slot is provided at the end of the drive rod located outside the bearing tray.

[0010] As a further improvement of this utility model, one end of the support tray is detachably connected to an isolation cover by screws.

[0011] The beneficial effects of this utility model are: In this invention, a locking mechanism is provided, which drives the docking seat to rotate via a transmission shaft. When the docking seat rotates, one locking rod slides towards the other under force. At this time, the limiting plate, under the action of the docking seat, drives the threaded rod to rotate synchronously, achieving locking and separation of the gearbox body and end cover. Due to the abutment surface, if the threaded rod rotates, causing the limiting plate to rotate, the limiting plate pushes the locking rod through the abutment surface, causing the locking rod to wedge between the bearing tray and the limiting plate, locking the limiting plate. This prevents the threaded rod from rotating independently, achieving unidirectional transmission. Since the threaded rod can only be driven to rotate by the transmission shaft for installation and cannot rotate on its own... The threaded rod, which drives the drive shaft to rotate, will not reverse or loosen due to continuous alternating loads, even in the high-frequency vibration environment of long-term vehicle operation. Structurally, this eliminates the potential for gaps between the gearbox housing and end cover caused by loose bolts, ensuring long-term reliable connection between the two. Furthermore, it reduces maintenance costs and risks. Since the threaded rod will not loosen on its own, there is no need for frequent inspections and retightening, reducing the manpower required for threaded rod maintenance. At the same time, it avoids serious problems such as end cover displacement and abnormal gear meshing caused by loose threaded rods, reducing the high costs caused by fault repairs and mitigating the safety risks caused by pedal motor failure. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the disassembled end cap structure of this utility model; Figure 3 This is a schematic diagram of the overall structure of the threaded rod of this utility model; Figure 4 This is a schematic diagram of the locking mechanism of this utility model; Figure 5 This is a schematic diagram of the limiting plate and its connection structure of the present invention.

[0013] In the diagram: 1. Gearbox housing, 2. End cover, 3. Screw hole, 4. Mounting hole, 5. Locking mechanism, 51. Threaded rod, 52. Support plate, 53. Limiting plate, 54. Drive shaft, 55. Connecting seat, 56. Locking rod, 57. Abutment surface, 58. Spring, 59. Drive rod, 510. Slot, 6. Isolation cover. Detailed Implementation

[0014] 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 1

[0015] like Figures 1 to 5 As shown, a gearbox for a pedal motor includes a gearbox housing 1, an end cover 2, a screw hole 3, a mounting hole 4, and a locking mechanism 5. The end cover 2 is connected to the gearbox housing 1 through the locking mechanism 5. The screw hole 3 is provided on the gearbox housing 1, and the mounting hole 4 is provided through the end cover 2. The locking mechanism 5 includes a threaded rod 51, a bearing plate 52 and a limit transmission unit. The threaded rod 51 is coaxially rotatably connected to one side of the bearing plate 52, and the threaded rod 51 passes through the mounting hole 4 and is threaded into the threaded hole 3. The bearing plate 52 abuts against the end cover 2, and the diameter of the bearing plate 52 is larger than the mounting hole 4. The limiting transmission unit includes a limiting disk 53 and a transmission shaft 54. A cavity is provided inside the bearing tray 52. ​​The limiting disk 53 is coaxially fixed to one end of the threaded rod 51 and rotatably connected in the cavity. The transmission shaft 54 ​​is rotatably connected to the other side of the bearing tray 52 and is located on the same axis as the limiting disk 53, and is rotatably connected to the limiting disk 53. The limiting transmission unit also includes a docking seat 55, a locking rod 56, and an abutment surface 57. The docking seat 55 is fixed on the transmission shaft 54, and an incline block is provided on the docking seat 55. The incline block is located at the edge of the limiting disk 53. The locking rod 56 is slidably engaged in the incline block. The abutment surface 57 is provided at the edge of the limiting disk 53, and the locking rod 56 slidably abuts against the abutment surface 57. The abutting surface 57 is composed of two inclined surfaces forming an integral structure. The two inclined surfaces are arranged opposite each other and form a pointed cone shape. There are at least two locking rods 56, and the two locking rods 56 abut against the two inclined surfaces respectively and are located on both sides of the mating seat 55. A groove is provided at the center of the side wall of the locking rod 56, and a spring 58 is engaged in the groove of the two adjacent locking rods 56.

[0016] In this invention, a locking mechanism 5 is provided, which drives the docking seat 55 to rotate via the transmission shaft 54. When the docking seat 55 rotates, one locking rod 56 is forced to slide towards the other locking rod 56. At this time, the limiting plate 53 drives the threaded rod 51 to rotate synchronously under the action of the docking seat 55, thereby locking and separating the gearbox housing 1 and the end cover 2. Due to the setting of the abutment surface 57, if the threaded rod 51 rotates and drives the limiting plate 53 to rotate, the limiting plate 53 pushes the locking rod 56 through the abutment surface 57, causing the locking rod 56 to wedge between the bearing tray 52 and the limiting plate 53, locking the limiting plate 53, thereby preventing the threaded rod 51 from rotating independently, achieving unidirectional transmission. Since the threaded rod 51 can only be driven by the transmission shaft 54, the locking mechanism 55 is designed to prevent the threaded rod 51 from rotating independently. The threaded rod 51 is installed by rotating the drive shaft 54, and it cannot drive the drive shaft 54 ​​to rotate in reverse. Even in the high-frequency vibration environment of a car during long-term driving, the threaded rod 51 will not loosen due to continuous alternating loads. Structurally, this eliminates the hidden danger of gaps between the gearbox housing 1 and the end cover 2 due to loose bolts, ensuring the long-term reliability of the connection between the two. Furthermore, it reduces maintenance costs and risks. Since the threaded rod 51 will not loosen on its own, there is no need for frequent inspection and retightening, reducing the manpower required for maintaining the threaded rod 51. At the same time, it avoids serious problems such as displacement of the end cover 2 and abnormal gear meshing caused by loose threaded rod 51, reducing the high costs caused by fault repairs and avoiding the safety risks caused by pedal motor failure. Example 2

[0017] like Figures 1 to 5 As shown, in addition to all the technical features included in Embodiment 1, this embodiment also includes: A drive rod 59 is fixed at the center of the drive shaft 54. One end of the drive rod 59 is located outside the support tray 52, and a slot 510 is provided at the end of the drive rod 59 located outside the support tray 52. ​​The slot 510 enables the drive rod 59 to quickly engage with an external tool, thereby driving the drive rod 59 to rotate quickly through the external tool.

[0018] One end of the tray 52 is detachably connected to an isolation cover 6 by screws. The detachable isolation cover 6 allows for quick disassembly and replacement of damaged internal components of the tray 52.

[0019] Working principle: When using this pedal motor, first pass the threaded rod 51 through the mounting hole 4 and thread it into the screw hole 3. Then, connect it to the slot 510 with an external tool. The external tool then drives the drive rod 59 to rotate quickly. The drive rod 59 drives the transmission shaft 54 ​​and the docking seat 55 to rotate synchronously. During rotation, one of the locking rods 56 is forced to slide towards the other locking rod 56. At this time, the limiting plate 53 drives the threaded rod 51 to rotate synchronously under the action of the docking seat 55, thereby locking the gearbox body 1 and the end cover 2. Due to the setting of the abutment surface 57, if the rotation of the threaded rod 51 drives the limiting plate 53 to rotate, the limiting plate 53 pushes the locking rod 56 through the abutment surface 57, causing the locking rod 56 to wedge between the bearing tray 52 and the limiting plate 53, locking the limiting plate 53. This prevents the threaded rod 51 from rotating on its own, thus achieving unidirectional transmission.

[0020] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0021] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A gearbox housing for a pedal motor, comprising a gearbox housing (1), an end cover (2), screw holes (3), mounting holes (4), and a locking mechanism (5), characterized in that, The end cap (2) is connected to the gearbox housing (1) by a locking mechanism (5), the screw hole (3) is provided on the gearbox housing (1), and the mounting hole (4) is provided through the end cap (2); The locking mechanism (5) includes a threaded rod (51), a bearing plate (52) and a limiting transmission unit. The threaded rod (51) is coaxially rotatably connected to one side of the bearing plate (52), and the threaded rod (51) passes through the mounting hole (4) and is threaded into the threaded hole (3). The bearing plate (52) abuts against the end cap (2), and the diameter of the bearing plate (52) is larger than that of the mounting hole (4). The limiting transmission unit includes a limiting disc (53) and a transmission shaft (54). The bearing tray (52) has a cavity. The limiting disc (53) is coaxially fixed to one end of the threaded rod (51) and rotatably connected in the cavity. The transmission shaft (54) is rotatably connected to the other side of the bearing tray (52) and is located on the same axis as the limiting disc (53) and rotatably connected to the limiting disc (53).

2. The gearbox housing of a pedal motor according to claim 1, characterized in that: The limiting transmission unit also includes a docking seat (55), a locking rod (56), and an abutment surface (57). The docking seat (55) is fixed on the transmission shaft (54), and a U-shaped locking block is provided on the docking seat (55). The U-shaped locking block is located at the edge of the limiting disk (53). The locking rod (56) is slidably engaged in the U-shaped locking block. The abutment surface (57) is provided at the edge of the limiting disk (53), and the locking rod (56) slidably abuts against the abutment surface (57).

3. The gearbox housing of a pedal motor according to claim 2, characterized in that: The abutting surface (57) is composed of two inclined surfaces forming an integral structure, and the two inclined surfaces are arranged opposite each other to form a pointed cone shape. There are at least two locking rods (56), and the two locking rods (56) abut against the two inclined surfaces respectively and are located on both sides of the docking seat (55).

4. The gearbox housing of a pedal motor according to claim 3, characterized in that: A groove is provided at the center of the side wall of the locking rod (56), and a spring (58) is engaged in the groove of two adjacent locking rods (56).

5. The gearbox housing of a pedal motor according to claim 1, characterized in that: A drive rod (59) is fixed at the center of the drive shaft (54). One end of the drive rod (59) is located outside the support tray (52), and a slot (510) is provided at the end of the drive rod (59) located outside the support tray (52).

6. The gearbox housing of a pedal motor according to claim 1, characterized in that: One end of the tray (52) is detachably connected to an isolation cover (6) by screws.

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