Ball core grinding torque drive

Abstract

This utility model relates to the field of torque transmission technology, and in particular to a torque transmission device for ball core grinding. It includes a transmission body, one end of which has a first through hole that matches the tip of a grinding machine's power shaft. The first through hole is used for surface connection between the tips of the grinding machine's power shaft and for transmitting power. The other end of the transmission body has a placement groove that matches the main shaft or auxiliary shaft at one end of the ball core. The first through hole communicates with the placement groove. In use, the transmission body is installed at one end of the tip of the grinding machine's power shaft. The first through hole of the transmission body is surface-connected with the tip of the grinding machine's power shaft. Simultaneously, the tip passes through the first through hole and enters the center hole of the main shaft on the ball core in the placement groove. A locking mechanism then locks the ball core and the transmission body, ensuring that the tip of the grinding machine's power shaft transmits torque to the ball core through the transmission body. This ensures stable and reliable ball core processing and improves the processing efficiency of the ball core.

Description

Technical Field

[0001] This utility model relates to the field of torque transmission technology, and in particular to a torque transmission for ball core grinding. Background Technology

[0002] The ball core is a key component in high-pressure ball valves, playing a crucial role in controlling fluid shut-off and flow. During production, the ball core surface requires WC spraying to achieve a surface hardness of HV1000 or higher, significantly extending its service life. Due to the stringent requirements for roundness, surface roughness, and the positional accuracy of the upper and lower cylindrical surfaces, the grinding of the ball core's spherical surface is a critical aspect of machining. Center holes are located on both the main and auxiliary shafts at both ends of the ball core, coaxially forming the first central axis. During the ball core grinding process, the power shaft tip of the grinding machine is a conical tip, which cannot provide torque to the ball core, thus failing to drive its rotation. If the torque is transmitted by clamping the tips at both ends of the grinding machine, it can easily cause slippage during grinding, reducing the machining efficiency and accuracy of the ball core. Utility Model Content

[0003] The technical problem to be solved by this utility model is: in order to solve the problem that the existing ball core grinding process, which transmits torque by clamping the two ends of the ball core through the tip, causes slippage in the ball core grinding process, reduces the processing efficiency of the ball core, and reduces the processing accuracy of the ball core, a ball core grinding torque transmitter is provided.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a ball core grinding torque transmitter, including a transmitter body. One end of the transmitter body has a first through hole that matches the tip of the grinding machine's power shaft. The first through hole is used for surface connection between the tips of the grinding machine's power shaft and for transmitting power. The other end of the transmitter body has a placement groove that matches the spindle at one end of the ball core. The first through hole communicates with the placement groove. A locking mechanism is provided on the transmitter body within the placement groove for locking the ball core and the transmitter body together. Compared with the prior art, this solution installs the transmitter body at one end of the grinding machine's power shaft tip. The first through hole of the transmitter body is surface-connected with the tip of the grinding machine's power shaft. At the same time, the tip passes through the first through hole and enters the center hole of the spindle on the ball core within the placement groove. Then, the locking mechanism locks the ball core and the transmitter body, ensuring that the grinding machine's power shaft tip transmits torque to the ball core through the transmitter body. This ensures stable and reliable ball core processing and improves the processing efficiency of the ball core.

[0005] To implement the locking mechanism, some preferred embodiments include a locking screw. The transmission body has a locking hole arranged radially along the placement groove, extending from the outer circumferential surface of the transmission body into the placement groove. The locking screw is threaded into the locking hole and passes through it, abutting against the outer circumferential surface of the spindle. By threading the locking screw into the locking hole, with one end of the locking screw passing through the locking hole and abutting against the outer circumferential surface of the ball core, the ball core and the transmission body are locked together, achieving torque transmission.

[0006] To ensure stable and reliable locking of the ball core and the transmission body, some preferred embodiments include having a plurality of locking holes arranged along the circumferential direction of the placement groove.

[0007] In some preferred embodiments, a plurality of the locking holes are evenly distributed along the circumferential direction of the first through hole.

[0008] In order to achieve the connection between the center of the grinding machine's power shaft and the first through hole profile, some preferred embodiments are provided, wherein a transition hole is provided between the first through hole and the placement groove, the cross-section of the first through hole is smaller than the cross-section of the transition hole, and the cross-section of the transition hole is smaller than the cross-section of the placement groove.

[0009] In some preferred embodiments, the cross-section of the first through hole is a non-circular cross-section formed by connecting at least one straight segment and at least one circular arc segment.

[0010] In some preferred embodiments, the cross-section of the first through hole includes two parallel straight segments and two arc segments disposed between the two parallel straight segments.

[0011] In some preferred embodiments, the transmission body is a stepped shaft along its axial direction, the first through hole is located at the small end of the stepped shaft, and the placement groove is located at the large end of the stepped shaft.

[0012] The beneficial effects of this utility model are as follows: When using the ball core grinding torque transmitter of this utility model, the transmitter body is installed at one end of the tip of the grinding machine's power shaft. The first through hole of the transmitter body is connected to the tip of the grinding machine's power shaft. At the same time, the tip passes through the first through hole and enters the center hole of the spindle on the ball core in the placement groove. Then, the locking mechanism locks the ball core and the transmitter body, ensuring that the tip of the grinding machine's power shaft transmits torque to the ball core through the transmitter body. This ensures stable and reliable ball core processing, improves the processing efficiency of the ball core, and avoids the problems of slippage during ball core grinding and reduced processing efficiency and accuracy caused by the clamping of the tips at both ends during the existing ball core spherical surface grinding process, where the transmission torque of the tips at both ends is relatively small. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 1 ;

[0015] Figure 2 This is a schematic diagram of the structure of this utility model. Figure 2 ;

[0016] Figure 3 This is a schematic diagram of the structure of this utility model in use. Figure 1 .

[0017] In the figure: 1. Transmission body, 2. First through hole, 3. Placement groove, 4. Locking screw, 5. Locking hole, 6. Transition hole, 7. Straight section, 8. Circular section, 9. Ball core, 10. Main spindle, 11. Secondary spindle, 12. Center hole, 13. Grinding machine power shaft center, 14. Grinding machine tailstock center. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the embodiments:

[0019] This utility model is not limited to the following specific embodiments. Those skilled in the art can implement this utility model using various other specific embodiments based on the disclosed content. Any modifications or alterations to the design structure and concept of this utility model also fall within the protection scope of this utility model. It should be noted that, unless otherwise specified, the embodiments and features described in this utility model can be combined with each other.

[0020] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] like Figure 1-3 As shown, a ball core grinding torque transmitter includes a transmitter body 1. One end of the transmitter body 1 has a first through hole 2 that matches the center point 13 of the grinding machine's power shaft. The first through hole 2 is used for surface connection between the center points 13 of the grinding machine's power shaft and for transmitting power. The other end of the transmitter body 1 has a placement groove 3 that matches the main shaft 10 or the auxiliary shaft 11 at one end of the ball core 9. The first through hole 2 communicates with the placement groove 3. A locking mechanism is provided on the body within the placement groove 3 for locking the ball core 9 and the transmitter body 1 together.

[0023] In this embodiment, the locking mechanism includes a locking screw 4, and a locking hole 5 is provided on the transmission body 1. The locking hole 5 is arranged radially along the first through hole 2. The locking hole 5 extends from the outer peripheral surface of the transmission body 1 to the placement groove 3. The locking screw 4 is threaded in the locking hole 5 and passes through the locking hole 5 to abut against the outer peripheral surface of the main shaft 10. Alternatively, another embodiment can be implemented by rotating an eccentrically mounted cam on the transmission body 1. The rotating cam contacts the main shaft 10, thereby locking the ball core 9 and the transmission body 1 together.

[0024] In this embodiment, four locking holes 5 are provided along the circumference of the first through hole 2. The four locking holes 5 are evenly distributed along the circumference of the first through hole 2. In addition to four, there can also be two, three, five or more locking holes 5.

[0025] A transition hole 6 is provided between the first through hole 2 and the placement groove 3. The cross-section of the first through hole 2 is smaller than the cross-section of the transition hole 6, and the cross-section of the transition hole 6 is smaller than the cross-section of the placement groove 3. The cross-section of the first through hole 2 is a non-circular cross-section formed by connecting at least one straight segment 7 and at least one arc segment 8. In this embodiment, the cross-section of the first through hole 2 includes two parallel straight segments 7 and two arc segments 8 disposed between the two parallel straight segments 7. That is, the first through hole 2 is a flat round hole. This cross-section matches the cross-section of the center point 13 of the grinding machine power shaft and transmits torque to the transmission device.

[0026] The transmission body 1 is a stepped shaft along its axial direction, the first through hole 2 is located at the small end of the stepped shaft, and the placement groove 3 is located at the large end of the stepped shaft.

[0027] In this embodiment, the ball core 9 to be processed is a sphere with a flow channel hole. The flow channel hole and the spherical surface are rounded to R. A main spindle 10 and a secondary spindle 11 are machined on the top and bottom. Inside the ball valve body, the main spindle 10 and the secondary spindle 11 are responsible for installing and positioning the ball core 9 and controlling the rotation of the ball core 9. The end faces of the main spindle 10 and the secondary spindle 11 are both drilled with center holes 12, which are used for spherical grinding. The outer surface of the sphere is coated with WC, with a surface roughness of 0.4. High roundness is also required, and it needs to be ground on a ball core 9 grinding machine.

[0028] When installing the aforementioned ball core grinding torque transmitter, first install the torque transmitter on the spindle 10 of the ball core 9, and gently tighten the locking screw to prevent the torque transmitter from falling off. Then, lift the ball core 9 and install it on the ball core 9 grinding machine. The torque transmitter passes through the center point of the power shaft and mates with the flat round shape. Its two ends are inserted into the center hole 12 of the ball core 9 for fixation. Then tighten the locking screw 4. After the installation of the ball core 9 and the torque transmitter is completed, four locking holes 5 are designed on the large outer circle of the torque transmitter. The locking screw 4 is threaded into the locking holes 5, tightened and fixed on the spindle 10 of the ball core 9 to realize the transmission of torque. Start the machine, the grinding disc rotates at high speed, and the ball core 9 rotates at low speed. Adjust the relative position of the ball core 9 and the grinding disc by CNC, and the ball core 9 can be ground.

[0029] The above description, based on the preferred embodiments of this utility model, provides inspiration. Those skilled in the art 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 contents of the specification but must be determined according to the claims.

Claims

1. A ball core grinding torque driver characterized by: The device includes a transmission body (1), one end of which is provided with a first through hole (2) that matches the center point (13) of the grinding machine power shaft. The first through hole (2) is used for surface connection between the center points (13) of the grinding machine power shaft and for transmitting power. The other end of the body is provided with a placement groove (3), which matches the main shaft (10) or secondary shaft (11) at one end of the ball core (9). The first through hole (2) is connected to the placement groove (3). The transmission body (1) is provided with a locking mechanism located in the placement groove (3) for locking the ball core (9) and the transmission body (1) together.

2. The ball core grinding torque driver of claim 1, wherein: The locking mechanism includes a locking screw (4), and a locking hole (5) is provided on the transmission body (1). The locking hole (5) is arranged radially along the placement groove (3). The locking hole (5) extends from the outer peripheral surface of the transmission body (1) into the placement groove (3). The locking screw (4) is threaded into the locking hole (5) and passes through the locking hole (5) to abut against the outer peripheral surface of the main shaft (10).

3. The ball core grinding torque driver of claim 2, wherein: The locking holes (5) are provided in several directions along the circumference of the first through hole (2).

4. The ball core grinding torque driver of claim 3, wherein: Several of the locking holes (5) are evenly distributed along the circumferential direction of the placement groove (3).

5. The ball core grinding torque driver of claim 1, wherein: A transition hole (6) is provided between the first through hole (2) and the placement groove (3) to communicate with each other. The cross-section of the first through hole (2) is smaller than the cross-section of the transition hole (6), and the cross-section of the transition hole (6) is smaller than the cross-section of the placement groove (3).

6. The ball core grinding torque driver of claim 1, wherein: The cross-section of the first through hole (2) is a non-circular cross-section formed by connecting at least one straight segment (7) and at least one circular arc segment (8).

7. The ball core grinding torque driver of claim 6, wherein: The cross-section of the first through hole (2) includes two parallel straight segments (7) and two arc segments (8) disposed between the two parallel straight segments (7).

8. The ball core grinding torque transmitter according to claim 1, characterized in that: The transmission body (1) is a stepped shaft along its axial direction, the first through hole (2) is located at the small end of the stepped shaft, and the placement groove (3) is located at the large end of the stepped shaft.

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