A space cam mechanism

Abstract

The utility model discloses a kind of space cam mechanisms, belong to space cam mechanism field, including driving wheel, transmission groove, assembly plate, connecting shaft, output end, transmission head and swing rod, transmission head includes sheath, first bearing and assembly rod, by being equipped with transmission head with low hardness sheath, transmission head is assembled on assembly rod by bearing for the transmission connection of driving wheel and swing rod, make the wear of transmission concentrate on the sheath of sleeve assembly, further reduce the wear of sheath using the assembly mode of bearing, and after sheath wear, only need to replace sheath, the assembly mode of sleeve also makes sheath replacement more convenient, maintenance more quickly, avoid the replacement of overall driving part and driven part, save maintenance cost.

Description

Technical Field

[0001] This utility model belongs to the field of spatial cam mechanisms, and specifically relates to a spatial cam mechanism. Background Technology

[0002] A spatial cam mechanism is a cam mechanism in which the relative motion between components includes spatial motion. Unlike planar cam mechanisms, its motion plane and the motion plane of the follower have a three-dimensional spatial relationship. A typical example is the cylindrical cam mechanism, which drives the follower to move in a plane parallel to the axis through the curved groove or end face profile of the cylindrical surface. However, in the use of existing technology, the transmission between the drive wheel and the follower usually adopts hard contact. Long-term use can easily lead to wear at the transmission point. After wear, it is often necessary to replace the entire drive or follower. In particular, the hardness of the groove or end face curve of the drive wheel is often lower than that of the follower, making it more prone to wear. Moreover, it is difficult to repair after wear, and the entire drive wheel needs to be replaced, which can easily lead to inconvenient maintenance and high maintenance costs. Utility Model Content

[0003] (a) Technical problems to be solved To overcome the shortcomings of existing technologies, a spatial cam mechanism is proposed to address the issue that in existing technologies, the transmission between the drive wheel and the driven component typically involves hard contact, which easily leads to wear at the transmission point after prolonged use. After wear, it is often necessary to replace the entire drive or driven component. In particular, the hardness of the grooves or end face curves of the drive wheel is often lower than that of the driven component, making it more prone to wear. Moreover, it is difficult to repair after wear, requiring the replacement of the entire drive wheel, which easily leads to inconvenient maintenance and high maintenance costs.

[0004] (II) Technical Solution This utility model is achieved through the following technical solution: This utility model proposes a spatial cam mechanism, the structure of which includes a drive wheel, a transmission groove, an assembly plate, a connecting shaft, an output end, a transmission head, and a swing rod. The drive wheel has a transmission groove on its side end face, which is an arc-shaped groove that undulates along the side end plane of the drive wheel. One end of the connecting shaft is equipped with an output end, and the other end of the connecting shaft passes through the assembly plate and is fixedly connected to one end of the swing rod. The other end of the swing rod is equipped with a transmission head, which is located in the transmission groove. The transmission groove is used to convert the rotation of the drive wheel into the back-and-forth swing of the transmission head and the swing rod. The transmission head includes a sheath, a first bearing, and an assembly rod. The first bearing is sleeved and assembled on one end of the assembly rod, and the other end of the assembly rod is assembled on a swing rod. The sheath is sleeved and assembled on the first bearing. The sheath is disposed in the transmission groove, and the hardness of the sheath is lower than that of the drive wheel.

[0005] Furthermore, it also includes a second bearing, which is assembled between the assembly plate and the coupling.

[0006] Furthermore, the transmission head also includes an end guard plate, a first limiting ring, and a positioning plate. The end guard plate is mounted on the side of the assembly rod away from the swing rod. There is one or more positioning plates, which are fixed to the end guard plate. One end of the positioning plate is in contact with the outer ring end of the first bearing. The positioning plate has an inclined threaded groove that increases in size towards the side away from the end guard plate at the end away from the first bearing. The inner ring end of the sheath is threadedly connected to the threaded groove of the positioning plate. The first limiting ring is a C-shaped ring with an opening at one end. The first limiting ring covers the positioning plate between the end guard plate and the sheath. The first limiting ring is used to limit the distance between the sheath and the end guard plate. The end guard plate and the sheath are made of the same material.

[0007] Furthermore, the transmission head also includes a second limiting ring, which is fixed to the end guard plate near the mounting rod side, and the second limiting ring is connected to the outer ring end of the first bearing.

[0008] Furthermore, the first limiting ring is made of elastic material, and the end guard plate is convex arc-shaped on the side away from the mounting rod.

[0009] Furthermore, the transmission head also includes a washer, a nut, and a screw. The screw is fixed to the side of the assembly rod away from the end guard plate. The diameter of the screw is smaller than that of the assembly rod. The screw passes through the swing rod and is locked by the nut. A washer is also assembled between the nut and the swing rod.

[0010] Furthermore, the positioning plate is provided with an anti-slip pad on the side that contacts the assembly rod.

[0011] Furthermore, the sheath is made of polyetheretherketone (PEEK).

[0012] Furthermore, the sheath includes an outer layer, a middle layer, and an inner layer, which are made of different wear-resistant materials or materials of different colors.

[0013] (III) Beneficial Effects One of the above technical solutions has the following advantages or beneficial effects: By using a transmission head with a low-hardness sheath, which is mounted on an assembly rod via a bearing for the transmission connection between the drive wheel and the swing arm, the wear of the transmission is concentrated on the sheath of the sleeve assembly. The bearing assembly method further reduces the wear of the sheath. After the sheath wears out, only the sheath needs to be replaced. The sleeve assembly method also makes the sheath replacement more convenient and maintenance faster, avoiding the replacement of the entire drive and driven components, thus saving maintenance costs. Attached Figure Description

[0014] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the components assembled on the assembly plate of this utility model; Figure 3 This is a cross-sectional structural diagram of the connection between the transmission head and the swing rod of this utility model; Figure 4 This utility model Figure 3 A magnified structural diagram of A in the middle; In the diagram: Drive wheel-1, Transmission groove-2, Assembly plate-3, Coupling shaft-4, Output end-5, Transmission head-6, Swing rod-7, Second bearing-8, End guard plate-601, Second limiting ring-602, First limiting ring-603, Sheath-604, Positioning plate-605, First bearing-606, Assembly rod-607, Washer ring-608, Nut-609, Screw-610, Outer layer-60401, Middle layer-60402, Inner layer-60403. Detailed Implementation

[0015] The present invention will be further described in detail below with reference to the embodiments, but the implementation of the present invention is not limited thereto.

[0016] Example 1: This utility model provides a spatial cam mechanism: its structure includes a drive wheel 1, a transmission groove 2, an assembly plate 3, a connecting shaft 4, an output end 5, a transmission head 6, and a swing rod 7. The drive wheel 1 has a transmission groove 2 on its side end face. The transmission groove 2 is an arc-shaped groove that undulates along the side end plane of the drive wheel 1. One end of the connecting shaft 4 is equipped with the output end 5. The other end of the connecting shaft 4 passes through the assembly plate 3 and is fixedly connected to one end of the swing rod 7. The other end of the swing rod 7 is equipped with the transmission head 6. The transmission head 6 is located in the transmission groove 2. The transmission groove 2 is used to convert the rotation of the drive wheel 1 into the back-and-forth swing of the transmission head 6 and the swing rod 7. The transmission head 6 includes a sleeve 604, a first bearing 606, and an assembly rod 607. The first bearing 606 is sleeved and assembled on one end of the assembly rod 607, and the other end of the assembly rod 607 is assembled on the swing rod 7. The sleeve 604 is sleeved and assembled on the first bearing 606. The sleeve 604 is located in the transmission groove 2, and the hardness of the sleeve 604 is lower than that of the drive wheel 1.

[0017] In one embodiment, a second bearing 8 is also included, which is assembled between the mounting plate 3 and the coupling 4.

[0018] When in use, the rotation of the drive wheel 1 will cause the transmission groove 2 to rotate accordingly. Since the transmission groove 2 is an arc-shaped groove that undulates along the side plane of the drive wheel 1, and the transmission head 6 is located in the transmission groove 2, when the transmission groove 2 rotates, the transmission head 6 will cause the swing rod 7 to swing along the connecting shaft 4 due to the undulation of the transmission groove 2, so that the connecting shaft 4 drives the output end 5 to swing. When the transmission groove 2 and the transmission head 6 are in contact, the low-hardness sheath 604 of the transmission head 6 will bear the main force and wear, thus avoiding direct contact between the first bearing 606 and the mounting rod 607 and the drive wheel 1. This can better avoid the need for replacement of the mounting rod 607 or the drive wheel 1 due to wear. The assembly method of mounting the first bearing 606 on the mounting rod 607 with the sheath 604 also allows the sheath 604 to rotate with the transmission groove 2 when in contact with the transmission groove 2, reducing wear. The sleeve assembly method also makes the maintenance of the sheath 604 more convenient, the maintenance of the mechanism faster, and the cost lower.

[0019] In one embodiment, the first bearing 606 is preferably an SKF bearing.

[0020] Example 2: Compared to the previous embodiment, the transmission head 6 in this embodiment further includes an end guard plate 601, a first limiting ring 603, and a positioning plate 605. The end guard plate 601 is mounted on the side of the mounting rod 607 away from the swing rod 7. There is one or more positioning plates 605, which are fixed to the end guard plate 601. One end of the positioning plate 605 is in contact with the outer ring end of the first bearing 606. The end of the positioning plate 605 away from the first bearing 606 is provided with an inclined threaded groove that increases towards the side away from the end guard plate 601. The inner ring end of the sleeve 604 is threadedly connected to the threaded groove of the positioning plate 605. The first limiting ring 603 is a C-shaped ring with an opening at one end. The first limiting ring 603 covers the positioning plate 605 between the end guard plate 601 and the sleeve 604. The first limiting ring 603 is used to limit the distance between the sleeve 604 and the end guard plate 601. The end guard plate 601 and the sleeve 604 are made of the same material.

[0021] In use, the end guard plate 601 provides all-around protection for the connection between the assembly rod 607 and the drive wheel 1. It also features an inclined threaded positioning plate 605. Combined with the threaded connection between the inner ring end of the sleeve 604 and the positioning plate 605, when the sleeve 604 is assembled with the first bearing 606, the first limiting ring 603 can be removed first, and then the sleeve 604 can be rotated to move towards the end guard plate 601. At this point, the positioning plate 605 is in a free state, making it easier to fit onto the bearing 606. The sleeve 604 can be fitted onto or removed from the first bearing 606. When the sleeve 604 is fitted onto the first bearing 606, the positioning plate 605 can be fitted onto the first bearing 606 first, and then the sleeve 604 can be locked by the threaded structure of the positioning plate 605. Finally, the sleeve 604 can be limited by the first limiting ring 603, so that the sleeve 604 can be quickly assembled relative to the first bearing 606. This ensures a stable assembly while facilitating disassembly and replacement. The remaining structure and effects are unchanged compared to the aforementioned embodiments.

[0022] In one embodiment, the transmission head 6 further includes a second limiting ring 602, which is fixed to the end guard plate 601 near the assembly rod 607. The second limiting ring 602 is connected to the outer ring end of the first bearing 606, so that when the end guard plate 601 is assembled by the positioning plate 605, a slot is maintained between the end guard plate 601 and the assembly rod 607 by the limiting of the second limiting ring 602. Combined with the fact that the second limiting ring 602 only contacts the outer ring end of the first bearing 606, the end guard plate 601 and the sleeve 604 will not come into contact with or rub against the assembly rod 607 when they rotate relative to the assembly rod 607.

[0023] In one embodiment, the first limiting ring 603 is made of an elastic material, and the end guard plate 601 is convex arc-shaped on the side away from the mounting rod 607.

[0024] In one embodiment, the positioning plate 605 is provided with an anti-slip pad (not shown in the figure) on the side that contacts the assembly rod 607, which better ensures that there is sufficient friction between the positioning plate 605 and the assembly rod 607 when the sheath 604 is locked, and further ensures the stability of the assembly.

[0025] Example 3: Compared to the previous embodiments, the transmission head 6 in this embodiment further includes a washer 608, a nut 609, and a screw 610. The screw 610 is fixed to the side of the assembly rod 607 away from the end guard plate 601. The diameter of the screw 610 is smaller than that of the assembly rod 607. The screw 610 passes through the swing rod 7 and is locked by the nut 609. A washer 608 is also installed between the nut 609 and the swing rod 7, so that the assembly rod 607 can also be disassembled and replaced relative to the swing rod 7, increasing the convenience of maintenance and reducing the maintenance cost when the component is damaged. The rest of the structure and effect are unchanged compared to the previous embodiments.

[0026] Example 4: Compared to the previous embodiments, the sheath 604 in this embodiment is made of polyetheretherketone, which allows it to have high temperature resistance, high strength, corrosion resistance and flame retardancy while having a hardness lower than that of the drive wheel 1. It is more practical, durable and safe. The rest of the structure and effects are unchanged compared to the previous embodiments.

[0027] Example 5: Compared to the previous embodiments, the sheath 604 in this embodiment includes an outer layer 60401, a middle layer 60402, and an inner layer 60403. The outer layer 60401, the middle layer 60402, and the inner layer 60403 are made of different wear-resistant materials or materials of different colors. The multi-layered structural design allows workers to judge the wear degree of the sheath 604 by the thickness or color of different layers, which facilitates timely maintenance and replacement and avoids excessive wear affecting precise operation and causing the first bearing 606 to directly contact and wear with the drive wheel 1. The remaining structure and effects are unchanged compared to the previous embodiments.

[0028] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] The control method of this utility model is to control the device by manually starting and stopping the switch. The wiring diagram of the power element and the supply of power are common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and wiring layout will not be explained in detail.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model 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 basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims. 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 spatial cam mechanism, the structure of which includes a drive wheel (1), a transmission groove (2), an assembly plate (3), a connecting shaft (4), an output end (5), a transmission head (6), and a swing rod (7). The drive wheel (1) has a transmission groove (2) on its side end face. The transmission groove (2) is an arc-shaped groove that undulates along the side end plane of the drive wheel (1). One end of the connecting shaft (4) is equipped with an output end (5). The other end of the connecting shaft (4) passes through the assembly plate (3) and is fixedly connected to one end of the swing rod (7). The other end of the swing rod (7) is equipped with a transmission head (6). The transmission head (6) is located in the transmission groove (2). The transmission groove (2) is used to convert the rotation of the drive wheel (1) into the back-and-forth swing of the transmission head (6) and the swing rod (7). Its features are: The transmission head (6) includes a sleeve (604), a first bearing (606) and an assembly rod (607). The first bearing (606) is sleeved and assembled on one end of the assembly rod (607), and the other end of the assembly rod (607) is assembled on the swing rod (7). The sleeve (604) is sleeved and assembled on the first bearing (606). The sleeve (604) is located in the transmission groove (2). The hardness of the sleeve (604) is lower than that of the drive wheel (1).

2. The spatial cam mechanism according to claim 1, characterized in that: It also includes a second bearing (8), which is assembled between the assembly plate (3) and the connecting shaft (4).

3. A spatial cam mechanism according to claim 1, characterized in that: The transmission head (6) further includes an end guard plate (601), a first limiting ring (603), and a positioning plate (605). The end guard plate (601) is mounted on the side of the mounting rod (607) away from the swing rod (7). There is one or more positioning plates (605). The positioning plates (605) are fixed on the end guard plate (601). One end of the positioning plate (605) is in contact with the outer ring end of the first bearing (606). The end of the positioning plate (605) away from the first bearing (606) is provided with a facing away from the end guard plate (601). The sheath (604) has an inclined threaded groove that increases on one side. The inner ring end of the sheath (604) is threadedly connected to the threaded groove of the positioning plate (605). The first limiting ring (603) is a C-shaped ring with an opening at one end. The first limiting ring (603) covers the positioning plate (605) between the end plate (601) and the sheath (604). The first limiting ring (603) is used to limit the distance between the sheath (604) and the end plate (601). The end plate (601) and the sheath (604) are made of the same material.

4. A spatial cam mechanism according to claim 3, characterized in that: The transmission head (6) also includes a second limiting ring (602), which is fixed to the end guard plate (601) near the mounting rod (607) and is connected to the outer ring end of the first bearing (606).

5. A spatial cam mechanism according to claim 3, characterized in that: The first limiting ring (603) is made of elastic material, and the end guard plate (601) on the side away from the assembly rod (607) is convex arc-shaped.

6. A spatial cam mechanism according to claim 3, characterized in that: The transmission head (6) also includes a washer (608), a nut (609) and a screw (610). The screw (610) is fixed to the side of the assembly rod (607) away from the end guard plate (601). The diameter of the screw (610) is smaller than that of the assembly rod (607). The screw (610) passes through the swing rod (7) and is locked by the nut (609). A washer (608) is also assembled between the nut (609) and the swing rod (7).

7. A spatial cam mechanism according to claim 3, characterized in that: The positioning plate (605) and the assembly rod (607) are fitted with anti-slip pads.

8. A spatial cam mechanism according to claim 1, characterized in that: The sheath (604) is made of polyetheretherketone.

9. A spatial cam mechanism according to claim 1, characterized in that: The sheath (604) includes an outer layer (60401), a middle layer (60402), and an inner layer (60403), wherein the outer layer (60401), the middle layer (60402), and the inner layer (60403) are made of different wear-resistant materials or of different colors.

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