A new multi-station cam and a method of using the cam

Abstract

The application aims at providing a new type of multi-station cam and a matching method thereof, and relates to the field of toy building block elements. The cam is composed of a mounting part and a flange, the flange is fixed to the outside of the mounting part, a cross shaft hole is arranged at the center position of the mounting part, the cross shaft hole is used for mounting a transmission shaft, and the cross shaft holes at both ends of the mounting part have an angle deviation of 45 degrees, thereby solving the problem that the number of work stations of the traditional cam building block is small and it is difficult to meet the building requirements of the gear box and the transmission.

Description

Technical Field

[0001] This invention relates to the field of toy building block components, and more particularly to a novel multi-station cam and a method for using and assembling the cam. Background Technology

[0002] In the process of building with blocks, cam components are often used as shifting actuators for power transmission rings (a type of clutch component commonly used in gearbox and transmission assembly), driving the power transmission ring to connect and disconnect power. Existing cam components employ a 4-station design, using an alternating design of one working station (the station where the power transmission ring transmits power) and one intermittent station (the station where the power transmission ring idles and does not transmit power). This results in a limited number of shifting stations, making it difficult to meet the assembly requirements of gearboxes and transmissions.

[0003] For example, CN111587138B proposes a toy gearbox that achieves gear shifting by engaging an axial cam with a guide component. However, this cam structure is a 4-station design with a 90° station interval, which cannot meet the needs of building more complex gearboxes and transmissions.

[0004] For example, CN202480046015.3 proposes a toy gearbox. The toy gearbox includes a cam element, which includes a central hub defining the axis of rotation and a grooved wheel extending at least partially around the hub. The hub has splined holes with angular offset at both ends for mounting the drive shaft and realizing the coaxial misalignment of multiple grooved wheels. Although this patent abandons the traditional cam structure and adopts a combination of grooved wheels and shift forks to give the shifting structure 8 positions, it results in a significant increase in the overall size of the gearbox. At the same time, the combination of multiple parts increases the friction between the parts, increases the difficulty of shifting, and reduces the stability of the shifting structure.

[0005] The present invention can smoothly drive the displacement of the power transmission ring through the curved design of the flange structure, reduce jamming, and make the cam form an 8-station structure. While doubling the number of stations, it does not increase the volume, thereby improving the mounting options for gearboxes and transmissions and effectively solving the above problems. Summary of the Invention

[0006] Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a novel multi-station cam and a method for using and matching the cam, which solves the problem that traditional cam building blocks have a limited number of stations, making it difficult to meet the assembly needs of complex gearboxes and transmissions.

[0007] Technical solution To achieve the above objectives, the present invention is implemented through the following technical solution: a novel multi-station cam, which consists of a mounting part and a flange, the flange being fixed to the outside of the mounting part, and the flange being able to push the follower to move.

[0008] Furthermore, the mounting part is provided with a cross shaft hole at its center, which is used to install the drive shaft. The length of the mounting part can be adjusted according to the needs of use and production, and a hollow structure can be added while ensuring the strength of the connection structure with the flange.

[0009] Furthermore, the flange has a ring structure with its ends connected, and a first protrusion and a second protrusion are provided on the flange, which are positioned opposite each other and distributed vertically. A transition section with a continuous curve is provided between the first protrusion and the second protrusion.

[0010] Furthermore, the transition section is thicker in the middle and thinner on both sides. The thicker middle of the transition section is intended to ensure the limiting effect on the power transmission ring, while the thinner sides are intended to achieve a curved connection with the first and second convex points, and at the same time provide clearance space when the power transmission ring moves. The flange is provided with 8 stations, one station every 45°.

[0011] Furthermore, the cross shaft hole is located on the mounting part, and the cross shaft hole passes through the mounting part.

[0012] Furthermore, the cross shaft hole does not penetrate the mounting part and is located at both ends of the mounting part, and the cross shaft holes at both ends may have an angular deviation of 45°.

[0013] Furthermore, the workstations are distinguished by the angles and heights of the upper and lower edges of the flange, represented by coordinates, with the center of the cam as the origin. Specifically, the workstations are: first workstation 90° (upper edge 2.0, lower edge -2.0), second workstation 135° (upper edge -1.3, lower edge -2.0), third workstation 180° (upper edge -2.1, lower edge -6.0), fourth workstation 225° (upper edge -1.3, lower edge -2.0), fifth workstation 270° (upper edge 2.0, lower edge -2.0), sixth workstation 315° (upper edge 2.0, lower edge 1.3), seventh workstation 0° (upper edge 6.0, lower edge 2.1), and eighth workstation 45° (upper edge 2.0, lower edge 1.3).

[0014] Furthermore, there is a 135° angle between the first protrusion (1021) and the second protrusion (1022), which makes the travel of the transition part (1023) on one side shorter and the travel of the transition part (1023) on the other side longer, thereby changing the triggering sequence of the working station and the idle station to meet different usage requirements.

[0015] This invention also proposes a novel method for using and matching multi-station cams, including the aforementioned novel multi-station cam, and further comprising the following steps: mounting at least one cam on a drive shaft, the cam meshing with a power transmission ring, and when there are multiple cams, each cam meshing with a different power transmission ring, each power transmission ring having a clutch transmission gear on both sides and a transmission path with different gear ratios, the transmission paths with different gear ratios connecting the same input end and the same output end; adjusting the angle of the drive shaft by a stepping component so that only one cam is in the working position at any given time, the power transmission ring meshed with this cam is connected to the clutch transmission gear on one side and connected to the corresponding transmission path, the power at the input end is output through the output end, and gear shifting is achieved by switching different transmission paths, the matching method of the cams includes at least one of the following: coaxial use of the same type of cam or different types of cams, use at the same angle or different angles, use in the same direction or different directions.

[0016] Furthermore, the cams are mounted in pairs on two parallel drive shafts, which are composed of a first drive shaft and a second drive shaft. The power transmission ring is slidably mounted on the sleeve shaft. The power transmission ring has an annular groove in the middle, which meshes with the flange of the cam. The upper and lower edges of the flange contact and push the upper and lower sides of the groove, causing the power transmission ring to move on the sleeve shaft, thereby switching between power transmission and idle speed.

[0017] Beneficial effects The present invention has the following beneficial effects: (1) The new multi-station cam and its usage method set up 8 stations through the curve design of the flange. Compared with the traditional 4-station design, the number of stations is increased, which makes the power transmission ring have more switching options during the movement and makes the combination of blocks more possible.

[0018] (2) The transition section design between the first and second protrusions on the flange has a thick middle section to ensure the limiting effect on the power transmission ring, so that the power transmission ring can be accurately limited when idle, avoiding deviation, ensuring the normal use of the gearbox (or transmission) after assembly, and improving the stability and reliability of the product. At the same time, through the curve design on the upper and lower sides of the flange, the power transmission ring can be limited at the upper and lower edges formed by the specific curves on both sides of the flange, regardless of the angle of the work position, even at the thin plate structure of the flange, to prevent the power transmission ring from deviating and affecting the normal use of the gearbox.

[0019] (3) Unlike the traditional four-position cam design, while ensuring that the cam diameter remains unchanged, an eight-position design is achieved with a single part, which enables the cam to achieve more dense position switching in a limited space, creating favorable conditions for the miniaturization design of multi-position gearboxes, and allowing the building block products to have richer functional expansion while maintaining a compact size.

[0020] (4) The “pre-displacement” method is adopted, that is, when the cam is in the idle position, the power transmission ring will still be displaced by a small distance, so that the displacement distance of the power transmission ring that the cam needs to push when entering the working position is shortened, and the power transmission ring enters a more stable and smooth displacement curve. At the same time, the number of working positions is not simply increased, but each working position is interconnected, so that the meshing and disengagement of the entire power transmission ring is smooth and uninterrupted during the idle process.

[0021] (5) By changing the relative angle between the first cam and the second cam, cam variants with different stroke characteristics can be derived. Then, through various combinations such as coaxial, non-coaxial, same angle, different angle, same direction, and different direction, multi-gear shifting function can be realized, which greatly expands the application range of cams in block transmission systems.

[0022] (6) The design of using a cam to directly drive the power transmission ring greatly reduces the space volume of the gearbox and transmission, and reduces the friction between parts, so that a single part can achieve the effect of multiple parts in traditional building block assembly, greatly improving the stability of driving the power transmission ring and reducing the difficulty of shifting gears.

[0023] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the overall structure of the present invention. Figure 3 ; Figure 4 This is a schematic diagram of the overall structure of the present invention. Figure 4 ; Figure 5 This is a schematic diagram of the overall structure of the present invention. Figure 5 ; Figure 6 This is a schematic diagram of the working state of the present invention; Figure 7 This is an exploded view of the working state of the present invention; Figure 8 This is a schematic diagram of the second embodiment of the present invention. Figure 1 ; Figure 9 This is a schematic diagram of the second embodiment of the present invention. Figure 2 ; Figure 10 This is an unfolded view of the flange structure of the present invention; Figure 11 This is a schematic diagram of the third embodiment of the present invention. Figure 1 ; Figure 12 This is a schematic diagram of the third embodiment of the present invention. Figure 2 ; Figure 13 This is a schematic diagram of the third embodiment of the present invention. Figure 3 ; Figure 14 This is an unfolded view of the flange structure according to the third embodiment of the present invention; Figure 15 This is a prior art schematic diagram of the present invention; Figure 16 This is a schematic diagram of the method of using the cam of the present invention. Figure 1 ; Figure 17 This is a schematic diagram of the method of using the cam of the present invention. Figure 2 Figure 18 This is a schematic diagram of the displacement of the driven member of the present invention.

[0025] Reference numerals: Cam 1; Mounting part 101; Flange 102; First protrusion 1021; Second protrusion 1022; Transition part 1023; First drive shaft 2; Second drive shaft 3; Third drive shaft 4; Sleeve shaft 5; Power transmission ring 6; Groove 601; First connecting part 602; Second connecting part 603; Stepper assembly 7; Input end 8; Output end 9. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Example 1 Please see Figure 1 - Figure 10The present invention provides a technical solution: a novel multi-station cam is composed of a mounting part 101 and a flange 102. The flange 102 is fixed to the outside of the mounting part 101. A cross shaft hole is provided at the center of the mounting part 101. The cross shaft hole is used to install a drive shaft. The cross shaft hole is located at both ends of the mounting part 101, and there is a 45° angular deviation between the two ends of the cross shaft hole.

[0028] like Figure 3 and Figure 4 As shown, the flange 102 has a ring structure with its ends connected. The flange 102 is provided with a first protrusion 1021 and a second protrusion 1022 that are opposite to each other and distributed vertically. A transition portion 1023 with a continuous curve is provided between the first protrusion 1021 and the second protrusion 1022. The transition portion 1023 is thicker in the middle and thinner at both sides. The thicker middle of the transition portion 1023 is intended to ensure the limiting effect on the driven member (power transmission ring 6), while the thinner sides are to achieve a curved connection with the first protrusion 1021 and the second protrusion 1022, and at the same time provide clearance space when the power transmission ring 6 moves.

[0029] In the specific embodiment one: as follows Figure 6 and Figure 7 As shown, during use, the first drive shaft 2 and the second drive shaft 3 are installed via the cross shaft holes at both ends of the mounting part 101, and a set of shafts 5 are installed via the third drive shaft 4. A power transmission ring 6 is slidably installed on the set of shafts 5. The two ends of the power transmission ring 6 are respectively provided with a first connecting part 602 and a second connecting part 603. Other building block parts can be inserted into the first connecting part 602 and the second connecting part 603 to realize power transmission. The middle part of the power transmission ring 6 is provided with an annular groove 601, which engages with the flange 102 of the cam 1. The rotation of the first drive shaft 2 and the second drive shaft 3 drives the cam 1 to rotate, and then the upper and lower edges of the flange 102 contact and push with the upper and lower sides of the groove 601 of the power transmission ring 6, causing the power transmission ring 6 to move on the set of shafts 5. The first connecting part 602 of the power transmission ring 6 is inserted into other building block parts to transmit power, or the second connecting part 603 of the power transmission ring 6 is inserted into other building block parts to transmit power, or the power transmission ring 6 is displaced slightly to maintain an idling state without transmitting power.

[0030] For ease of understanding, using common building block dimensions as an example, the diameter of cam 1 is 21.6mm, the diameter of power transmission ring 6 is 14mm, and the axial distance between cam 1 and power transmission ring 6 is 16mm. (Refer to...) Figure 10 ,in Figure 10 The horizontal axis represents the rotation angle of cam 1. Figure 10 The ordinate is the height of flange 102. Figure 10 The positive or negative value of the ordinate indicates the direction.

[0031] Figure 10 The middle curves are the upper and lower edges of the flange 102, where 0° is the middle of the second convex point 1022, 180° is the middle of the first convex point 1021, and 90° is the middle of the transition section 1023. Each 45° interval represents a work station. This cam has a total of 8 work stations, specifically: At the first working position (initial working position), the flange 102 engages with the power transmission ring 6 at 90° (meaning the flange 102 at 90° faces the center of the power transmission ring 6, and the same applies below). At this time, the power transmission ring 6 is at 0 and is in an idling state. At the second station, flange 102 engages with power transmission ring 6 at 135°. At this time, power transmission ring 6 is at -0.8°, in an idling state (no power transmission). When switching from the first station to the second station, the upper edge of flange 102 disengages from power transmission ring 6. Figure 10 At 120° (1.1mm) of the upper curve, the power transmission ring 6 is moved 0.8mm by the lower edge of the flange 102, so that the power transmission ring 6 is ready to be connected with other building block parts. At the third station, the flange 102 engages with the power transmission ring 6 at 180°. At this time, the power transmission ring 6 is at -4. The second connecting part 603 of the power transmission ring 6 is inserted into other building block parts to transmit power. When switching from the second station to the third station, the lower edge of the flange 102 pushes the power transmission ring 6 to move 3.2mm. At the fourth station, the flange 102 engages with the power transmission ring 6 at 225°. At this time, the power transmission ring 6 is at -0.8 and is in an idling state. When switching from the third station to the fourth station, the upper edge of the flange 102 pushes the power transmission ring 6 to move 3.2mm, so that the power transmission ring 6 is just disengaged from the connection of other building block parts. At the fifth station, the flange 102 engages with the power transmission ring 6 at 270°. At this time, the power transmission ring 6 is at 0 and is in an idling state. When switching from the fourth station to the fifth station, the upper edge of the flange 102 pushes the power transmission ring 6 to move by 0.8mm, so that the power transmission ring 6 returns to the initial station. At the sixth station, the flange 102 engages with the power transmission ring 6 at 315°. At this time, the power transmission ring 6 is at 0.8 mm and is in an idling state. When switching from the fifth station to the sixth station, the upper edge of the flange 102 pushes the power transmission ring 6 to move 0.8 mm, so that the power transmission ring 6 is ready to connect with other building block parts. At the seventh station, the flange 102 engages with the power transmission ring 6 at 0°. At this time, the power transmission ring 6 is at position 4. The first connecting part 602 of the power transmission ring 6 is inserted into other building block parts to transmit power. When switching from the sixth station to the seventh station, the upper edge of the flange 102 pushes the power transmission ring 6 to move 3.2mm. At the eighth station, the flange 102 engages with the power transmission ring 6 at 45°. At this time, the power transmission ring 6 is at 0.8 and is in an idling state. When switching from the seventh station to the eighth station, the lower edge of the flange 102 pushes the power transmission ring 6 to move 3.2mm, so that the power transmission ring 6 is just disengaged from the connection of other building block parts.

[0032] When this cam 1 completes one revolution, as Figure 18 As shown, the displacement ranges of the power transmission ring 6 are as follows: from 0 to -0.8, from -0.8 to -4, from -4 to -0.8, from -0.8 to 0, from 0 to 0.8, from 0.8 to 4, from 4 to 0.8, and from 0.8 to 0. During this process, the cam 1 completes one station switch every 45° of rotation, and the power transmission ring 6 reaches the required displacement position. Compared to the 90° rotation stroke of a traditional cam, this is halved, significantly improving the shift response speed. The process is smooth and seamless, without any jamming. This is thanks to the flange 102's coordinated limiting and avoidance design on both sides of the upper and lower edges in the thin-plate structure area, ensuring that the power transmission ring 6 is reliably bidirectionally limited at any position.

[0033] All of the above positions are subject to reliable bidirectional limiting, specifically as follows: Figure 10 As shown, at the thin plate structure of the flange 102 at 45° and 135°, the flange 102 can simultaneously limit the power transmission ring 6 through the upper and lower edges at a certain angle on both sides, thereby ensuring the stability of the power transmission ring 6. For example, at 45°, the lower edge of the flange 102 at 60° can limit the power transmission ring 6, and the upper edge at 30° can also limit the power transmission ring 6, thus limiting the power transmission ring 6 on both the upper and lower sides. The same applies to the cam 1 at 135°, 225° and 315°. The two edges work together to provide reliable bidirectional limiting of the power transmission ring 6 in the thin plate structure area. At the same time, a smooth transition curve is formed between the work stations, providing smooth clearance for the movement of the power transmission ring 6. This design is the key to the smooth shifting of the cam 1 with a 45° rotation stroke. Even in the thinnest area of ​​the flange 102, the power transmission ring 6 will not shift or jam due to loss of limiting, thus ensuring that the entire shifting process is smooth and without jamming.

[0034] Meanwhile, it is known that the engagement and disengagement of the power transmission ring 6 at idle speed requires a displacement of 4mm. During the switching of work positions, the cam 1 adopts a "pre-displacement" method. That is, when the cam 1 is in the idle work position, the power transmission ring 6 will still be displaced by a small distance. For example, when switching from work position 1 to work position 2, from work position 4 to work position 5, from work position 5 to work position 6, and from work position 8 to work position 1, the power transmission ring 6 will be pre-displaced by 0.8mm. This shortens the displacement distance that the cam 1 needs to push the power transmission ring 6 when entering the working work position, and allows the power transmission ring 6 to enter a more stable and smooth displacement curve, making the entire engagement and disengagement process of the power transmission ring 6 smooth and without jamming.

[0035] Furthermore, at positions such as 0° and 180°, the height of flange 102 is 3.9mm, and there is a 0.1mm gap between it and the 4.0mm width of groove 601 of power transmission ring 6. This eliminates the influence of tolerance between cam 1 and power transmission ring 6, making the rotation process smoother and more stable.

[0036] In contrast, existing technologies such as Figure 15 As shown, its cam edge adopts a thin plate structure, with only 4 stations (one station every 90°). Due to the flange curve design of existing technologies, when driving the power transmission ring 6, a 90° rotation is required to achieve the required displacement distance (the distance for the power transmission ring 6 to engage or disengage from idle). However, this cam 1, through the curve design of its flange 102, only needs to rotate 45° to achieve the required displacement distance for the power transmission ring 6, significantly shortening the rotational stroke required for gear shifting, significantly improving shifting response speed, and effectively reducing delays in power transmission. In the practical application of modular gearboxes, this characteristic allows for an increase in the number of gears while ensuring the accuracy and smoothness of gear shifting, better replicating the operating logic of real machinery. Furthermore, this design allows the cam to achieve more dense station switching within a limited space, creating favorable conditions for the miniaturization design of multi-gear gearboxes, enabling modular products to maintain a compact size while possessing richer functional expandability.

[0037] Example 2 In Embodiment Two, which differs from the above scheme: For example... Figure 8 and Figure 9 As shown, the length of the mounting part 101 can be adjusted according to usage and production needs, and a hollow structure is added while ensuring the strength of the connection structure with the flange 102 to save costs.

[0038] Example 3 In Embodiment 3, which differs from the above embodiments: the relative positions of the first protrusion 1021 and the second protrusion 1022 can be changed according to usage requirements, thereby forming a new cam embodiment structure (Embodiment 3), such as... Figure 11 , Figure 12 , Figure 13 and Figure 14 As shown, there is a 135° angle between the first protrusion 1021 and the second protrusion 1022, which makes the travel of the transition part 1023 on one side shorter and the travel of the transition part 1023 on the other side longer, thereby changing the triggering sequence of the working station and the idle station to meet different usage requirements.

[0039] In specific embodiments: the cams described in Embodiment 1 and Embodiment 3 above can be used in combination or in combination, specifically including but not limited to: Two or more of the same type of cam can be used together on the same axis or on different axes; Two or more of the same type of cam can be used together at the same angle or at different angles. Two or more of the same type of cam can be used in the same direction or in different directions. Two or more different types of cams can be used together on the same axis or on different axes; Two or more different types of cams can be used together at the same angle or at different angles. Two or more different types of cams may be used in the same or different directions, as well as combinations not mentioned above.

[0040] The following examples illustrate specific usage scenarios, such as... Figure 16 As shown: The cams 1 are mounted in pairs on two parallel transmission shafts (the transmission shafts are composed of a first transmission shaft 2 and a second transmission shaft 3). The transmission shafts are equipped with stepping components. Each cam 1 has a different angle and each cam 1 meshes with a different power transmission ring 6. Each power transmission ring 6 has a clutch transmission gear on both sides and a transmission path with different gear ratios. The transmission paths with different gear ratios are connected to the same input end 8 and the same output end 9.

[0041] In use, the angle of the drive shaft is adjusted by the stepper assembly. Since the angles of each cam 1 are different, only one cam 1 is in the working position at the same time. The power transmission ring 6 engaged by the cam 1 is connected to the clutch transmission gear on one side and connected to the transmission path. Thus, the power of the input end 8 is output through the output end 9. Since the gear ratios of each transmission path are different, the gear shifting effect is achieved.

[0042] Working principle: During use, the first drive shaft 2 and the second drive shaft 3 are installed through the cross shaft holes at both ends of the mounting part 101, and a set of shafts 5 are installed through the third drive shaft 4. A power transmission ring 6 is slidably installed on the set of shafts 5. The two ends of the power transmission ring 6 are respectively provided with a first connecting part 602 and a second connecting part 603. Other building block parts can be inserted into the first connecting part 602 and the second connecting part 603 to realize the transmission of power. The middle part of the power transmission ring 6 is provided with an annular groove 601, which engages with the flange 102 of the cam 1. The rotation of the first drive shaft 2 and the second drive shaft 3 drives the cam 1 to rotate. Then, the upper and lower edges of the flange 102 contact and push with the upper and lower sides of the groove 601 of the power transmission ring 6, causing the power transmission ring 6 to move on the set of shafts 5. The first connecting part 602 of the power transmission ring 6 is inserted into other building block parts to transmit power, or the second connecting part 603 of the power transmission ring 6 is inserted into other building block parts to transmit power, or the power transmission ring 6 is displaced slightly to maintain an idling state without transmitting power.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A novel multi-station cam, comprising a mounting part (101) and a flange (102), characterized in that, The flange (102) is fixed to the outside of the mounting part (101), and the flange (102) can push the driven member to move.

2. The novel multi-station cam according to claim 1, characterized in that, The mounting part (101) has a cross shaft hole at its center, which is used to install the drive shaft. The length of the mounting part (101) can be adjusted according to the needs of use and production, and a hollow structure is added while ensuring the strength of the connection structure with the flange (102).

3. The novel multi-station cam according to claim 1, characterized in that, The flange (102) has a ring structure with the ends connected. The flange (102) is provided with a first protrusion (1021) and a second protrusion (1022) that are opposite to each other and distributed vertically. A transition section (1023) with a continuous curve is provided between the first protrusion (1021) and the second protrusion (1022).

4. The novel multi-station cam according to claim 3, characterized in that, The transition section (1023) is thick in the middle and thin on both sides. The thicker middle of the transition section (1023) is intended to ensure the limiting effect on the power transmission ring (6), while the thinner sides are intended to achieve the curved connection with the first protrusion (1021) and the second protrusion (1022), and at the same time provide clearance space when the power transmission ring (6) moves. The flange (102) has 8 stations, one station every 45°.

5. The novel multi-station cam according to claim 2, characterized in that, The cross shaft hole is located on the mounting part (101) and the cross shaft hole passes through the mounting part (101).

6. The novel multi-station cam according to claim 2, characterized in that, The cross shaft hole does not penetrate the mounting part (101) and is located at both ends of the mounting part (101), with a 45° angular deviation between the cross shaft holes at both ends.

7. The novel multi-station cam according to claim 4, characterized in that, The workstations are distinguished by the angle and height of the upper and lower edges of the flange, represented by coordinates, with the center of the cam (1) as the origin. Specifically, the workstations are as follows: the first workstation is 90° (upper edge 2.0, lower edge -2.0), the second workstation is 135° (upper edge -1.3, lower edge -2.0), the third workstation is 180° (upper edge -2.1, lower edge -6.0), the fourth workstation is 225° (upper edge -1.3, lower edge -2.0), the fifth workstation is 270° (upper edge 2.0, lower edge -2.0), the sixth workstation is 315° (upper edge 2.0, lower edge 1.3), the seventh workstation is 0° (upper edge 6.0, lower edge 2.1), and the eighth workstation is 45° (upper edge 2.0, lower edge 1.3).

8. The novel multi-station cam according to claim 4, characterized in that, There is a 135° angle between the first protrusion (1021) and the second protrusion (1022), which makes the travel of the transition part (1023) on one side shorter and the travel of the transition part (1023) on the other side longer, thereby changing the triggering sequence of the working station and the idle station to meet different usage requirements.

9. A novel method for using a multi-station cam, comprising any one of claims 1 to 7, characterized in that, Includes the following steps: At least one cam (1) is mounted on the drive shaft. The cam (1) meshes with the power transmission ring (6). When there are multiple cams (1), each cam (1) meshes with a different power transmission ring (6). Each power transmission ring (6) has a clutch transmission gear on both sides and a transmission path with different gear ratios. The transmission paths with different gear ratios are connected to the same input end (8) and the same output end (9). The angle of the drive shaft is adjusted by the stepper assembly (7) so that only one cam (1) is in the working position at the same time. The power transmission ring (6) engaged by the cam (1) is connected to the clutch transmission gear on one side and connected to the corresponding transmission path. The power of the input end (8) is output through the output end (9). Gear shifting is achieved by switching different transmission paths. The cam pairing method includes at least one of the following: coaxial use of the same type of cam (1) or different types of cam (1), use at the same angle or different angles, use in the same direction or different directions.

10. The method of use according to claim 9, characterized in that: The cams are mounted in pairs on two parallel drive shafts. The drive shafts are composed of a first drive shaft (2) and a second drive shaft (3). The power transmission ring (6) is mounted on the sleeve shaft (5) in a sliding manner. The middle part of the power transmission ring (6) is provided with an annular groove (601). The groove (601) meshes with the flange (102) of the cam (1). The upper and lower edges of the flange (102) contact and push the upper and lower sides of the groove (601), causing the power transmission ring (6) to move on the sleeve shaft (5) to realize the switching between power transmission and idle state.

Images