Stitch cam structure
By adopting the design of spiral grooves and limit blocks in the Dumu cam structure, the disengagement problem caused by insufficient depth of the groove body is solved, and higher stability and accuracy are achieved, avoiding wear and damage.
Patent Information
- Application Number
- CN202422489828.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-15
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-10-15
AI Technical Summary
The groove depth of the existing Dumu cam structure is shallow, which makes the Dumu triangle easy to detach, and the motor performance differences cause large rotation angle errors, reducing movement accuracy.
The spiral groove design is adopted, with the groove depth deepening to increase the contact area, and the combination of limit blocks and fixed seats ensures that the dime cam rotates within a defined range, and the structural stability and accuracy are improved using mixed metal powder injection molding.
It improves the contact stability of the dime triangle, reduces the probability of disengagement, reduces wear, enhances the accuracy of the rotation angle, and avoids device damage.
Smart Images
Figure CN223255605U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a mesh cam structure. Background Art
[0002] The mesh cam is a limiting device used on a knitting machine to realize the up and down movement of the mesh triangle. The mesh cam is generally provided with a groove body for limiting the movement of the mesh triangle. Generally, the groove body is shallow, and the mesh triangle can easily detach from the groove body. In addition, the rotation of the mesh cam is controlled by a motor. The difference in motor performance may cause a large error in the rotation angle, reducing the accuracy of the movement of the mesh triangle. Utility Model Content
[0003] In order to overcome the above-mentioned deficiencies, the utility model provides a mesh cam structure with strong stability and high precision.
[0004] To achieve this purpose, the structure adopted by the utility model is: a degree cam structure, including a wheel body, a spiral groove is provided on the top surface of the wheel body, the edge height of the spiral groove is 0.5 to 0.75 times the width of the groove, a fixing seat is provided at the bottom of the wheel body, an axial hole is provided in the center of the fixing seat, the axial hole passes through the wheel body, a limit block is provided at the bottom of the wheel body, and a connecting hole is provided on the limit block.
[0005] A boss is provided in the center of the top surface of the wheel body, and a spiral groove surrounds the boss. The boss is located in the center of the spiral groove, and the boss angle at the end half wraps the shaft hole. The extension line of the boss angle arc is tangent to the shaft hole.
[0006] The connecting line between the center line of the limit block and the center of the shaft hole and the connecting line between the shaft hole and the end of the spiral groove directly form an angle of 105° to 75°.
[0007] One end of the limiting block facing the fixing seat is closed, and the other end is provided with a connecting hole.
[0008] The wheel body, the fixing seat and the limiting block are integrally formed by injection molding of mixed metal powder.
[0009] Its beneficial effects are: the structural design of the utility model is reasonable and ingenious. After the depth of the spiral groove is deepened, the contact area between the mesh cam and the mesh cam is increased, the probability of the mesh cam being separated is reduced, and the influence of wear caused by long-term operation on the stability of the structure is reduced. The limit block is used to connect the limit rod to make the mesh cam rotate within a limited range, thereby improving the accuracy of the wheel rotation angle and avoiding accidental excessive rotation of the wheel body to damage the device. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] The present invention will be described by way of examples with reference to the accompanying drawings, in which:
[0011] Figure 1 It is a three-dimensional structural diagram of the utility model;
[0012] Figure 2 This is a bottom-up three-dimensional structural diagram of the present invention;
[0013] Figure 3 It is a top view of the utility model. DETAILED DESCRIPTION
[0014] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.
[0015] In the description of the utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of the utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0016] In the description of the utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc., should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components; a fixed connection can be welding or gluing. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.
[0017] like Figure 1-Figure 3 The mesh cam structure shown includes a wheel body 1, a spiral groove 2 is provided on the top surface of the wheel body 1, and the edge height of the spiral groove 2 is 0.5 to 0.75 times the groove width. A fixing seat 3 is provided at the bottom of the wheel body 1, and an axial hole 4 is provided in the center of the fixing seat 3. The axial hole 4 passes through the wheel body 1. A limit block 6 is provided at the bottom of the wheel body 1, and a connecting hole 7 is provided on the limit block 6.
[0018] The limiting block 6 is closed at one end facing the fixing seat, and a connecting hole 7 is provided at the other end.
[0019] As the depth of the spiral groove 2 is deepened, the contact area with the mesh cam is increased, the probability of the mesh cam being detached is reduced, and the impact of wear caused by long-term operation on the stability of the structure is reduced. The limit block 6 is used to connect the limit rod to make the mesh cam rotate within a limited range, thereby improving the accuracy of the wheel rotation angle and avoiding accidental excessive rotation of the wheel body to damage the device.
[0020] A boss 8 is provided in the center of the top surface of the wheel body 1. The spiral groove 2 surrounds the boss 8. The boss corner 81 at the end of the boss 8 located in the center of the spiral groove 2 half-encloses the shaft hole 4. The extended arc of the boss corner 81 is tangent to the shaft hole 4. The portion of the angled triangle disposed within the spiral groove 2 reduces friction with the connecting shaft in the shaft hole 4 when the spiral groove rotates.
[0021] The connecting line between the center line of the stopper 6 and the center of the shaft hole 4 and the connecting line between the shaft hole 4 and the end of the spiral groove 2 are directly lowered to form an angle of 105° to 75°. The stress on the stopper 6 when limiting here is small, and the limited angle range is large.
[0022] The wheel body, fixing seat and limit block are integrally formed by injection molding of mixed metal powder, which includes nickel, molybdenum, iron and part of carbon. The hardness is then increased by quenching. The overall hardness is significantly improved compared to the cast-molded structure.
[0023] The above description is based on the present invention. Based on the above description, relevant personnel can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the content of the specification. Its technical scope must be determined according to the scope of the claims.
Claims
1. A cam structure comprising a wheel body (1), characterized in that: The top surface of the wheel body (1) is provided with a spiral groove (2), the edge height of the spiral groove (2) is 0.5 to 0.75 times the width of the groove, a fixing seat (3) is provided at the bottom of the wheel body (1), an axial hole (4) is provided at the center of the fixing seat (3), and the axial hole (4) passes through the wheel body (1), a limiting block (6) is provided at the bottom of the wheel body (1), and a connecting hole (7) is provided on the limiting block (6).
2. The cam structure according to claim 1, characterized in that: A boss (8) is provided in the center of the top surface of the wheel body (1), and the spiral groove (2) surrounds the boss (8). The boss (8) is located in the center of the spiral groove (2), and the boss angle (81) at the end half-encloses the shaft hole. The extension line of the arc of the boss angle (81) is tangent to the shaft hole (4).
3. The mesh cam structure according to claim 1, characterized in that: The connection line between the center line of the limit block (6) and the center of the shaft hole (4) and the connection line between the shaft hole (4) and the end of the spiral groove (2) are directly connected at an angle of 105° to 75°.
4. The mesh cam structure according to claim 1 or 3, characterized in that: One end of the limit block (6) facing the fixing seat (3) is closed, and the other end is provided with a connecting hole (7).
5. The mesh cam structure according to claim 1, characterized in that: The wheel body (1), the fixing seat (3) and the limiting block (6) are integrally formed by injection molding of mixed metal powder.