A driving device and a grinding device having the same

Abstract

The present invention relates to the technical field of valve sealing surface processing equipment, and specifically to a driving device and a grinding device having the same. A driving device comprises: a driving shaft; a turntable, an internal gear is provided inside, the internal gear is meshed with a first external gear and a second external gear, and the first external gear is fixedly arranged; a driven shaft is fixedly connected to the second external gear and eccentrically arranged with the driving shaft. When the driving shaft drives the turntable to rotate, the turntable applies a first force to the second external gear to make it rotate and a second force to rotate eccentrically, and under the action of the first external gear, a third force is applied to the second external gear through the internal gear in the opposite direction of the rotation, and the third force is equal to the first force. A driving device provided by the present invention offsets the force that drives the driven shaft to rotate, so that the driven shaft only rotates eccentrically and does not rotate. Therefore, the first grinding member only slides relatively, and the accuracy of the sealing surface will not be affected due to the inability to fit due to the rotation.

Description

Technical Field

[0001] The invention relates to the technical field of valve sealing surface processing equipment, and in particular to a driving device and a grinding device having the same. Background Art

[0002] A check valve is a valve whose opening and closing parts are circular discs and which rely on their own weight and medium pressure to produce movement to block the backflow of the medium. The disc of the check valve opens under the action of fluid pressure, and the fluid flows from the inlet side to the outlet side. When the pressure on the inlet side is lower than that on the outlet side, the disc automatically closes under the action of factors such as the fluid pressure difference and its own gravity to prevent the backflow of the fluid. In order to ensure the sealing quality of the sealing surface, the valve body and disc need to be ground separately, and the valve body and disc also need to be ground against each other. Most of the grinding work is done manually by the operator, resulting in low grinding efficiency, and the grinding track, grinding speed, and grinding force are difficult to control. Therefore, the precision of the finished product is low and the ideal sealing effect cannot be achieved.

[0003] To this end, the prior art discloses a grinder having two independent drive motors, one for the rotation of the grinding disc and the other for the non-center swing of the grinding disc, and both motors can control the movement of the transmission shaft through a transmission mechanism without affecting each other, wherein the transmission mechanism includes an externally meshed first gear connected to the output shaft of the first motor, a second gear externally meshed with the first gear, an internally meshed third gear eccentrically arranged on the second gear, an externally meshed fourth gear keyed to the output shaft of the third gear, an internally meshed fifth gear connected to the output shaft of the second motor, and a sixth gear meshed with the third gear, the fourth gear and the fifth gear form a planetary gear train, the output shaft of the sixth gear is connected to the transmission shaft, and the sealing surface is ground by superimposing two movements on the transmission shaft. However, the structure of the grinder is complex, and when the sealing surface is small, if the grinding disc rotates itself while performing eccentric movement, the grinding disc and the sealing surface or the two sealing surfaces will not fit together for grinding, affecting the accuracy of the sealing surface. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the transmission shaft follows the self-rotation during the eccentric rotation of the existing driving device when working, thereby affecting the accuracy of the sealing surface.

[0005] In order to solve the above technical problems, the present invention provides a driving device, comprising:

[0006] Drive shaft;

[0007] A rotating disk connected to the driving shaft, wherein an internal gear is rotatably connected inside the rotating disk, wherein a first external gear and a second external gear are axially staggered and meshed with each other, and the first external gear is fixedly arranged;

[0008] The driven shaft is coaxially fixedly connected with the second external gear and eccentrically arranged with the driving shaft. The end of the driven shaft away from the second external gear is connected to the first grinding member. When the driving shaft drives the turntable to rotate synchronously along the first direction, the turntable applies a first force to the second external gear to make it rotate and a second force to eccentrically rotate along the first direction. At this time, the first external gear is stationary, and a third force in the opposite direction of the rotation direction is applied to the second external gear through the internal gear, and the third force is equal to the first force.

[0009] The driving shaft is a hollow cylindrical structure, and a fixed shaft is arranged inside. The driving shaft rotates around the fixed shaft, and the first external gear is fixedly connected to the fixed shaft.

[0010] The driving shaft is connected with a first driving member via a transmission member.

[0011] One end of the driven shaft away from the second external gear is connected to the first grinding member via a connecting plate and a connecting member arranged on the connecting plate.

[0012] The present invention also provides a grinding device, comprising the above-mentioned driving device.

[0013] The driving device is slidably connected with the column in the axial direction of the driving shaft through the cross arm so as to slide to a position connected with the first grinding member.

[0014] The cross arm is connected to the column via a first linear drive mechanism. Driven by the first linear drive mechanism, the cross arm slides back and forth along the column.

[0015] The first linear drive mechanism includes a first screw rod and a second drive member connected to one end of the first screw rod.

[0016] A slide table is also provided, on which a slide plate is slidably connected along an axial direction perpendicular to the driving shaft, and a second grinding member is arranged on the slide plate.

[0017] The column is arranged at one end of the slide, and a second linear drive mechanism is arranged on the slide. The second linear drive mechanism includes a second screw rod, one end of which is rotatably connected to the column, and the slide plate is connected to the second screw rod. The second screw rod is rotated to make the slide plate slide back and forth along the slide.

[0018] The technical solution of the present invention has the following advantages:

[0019] 1. A driving device provided by the present invention comprises a driving shaft, a rotating disk and a driven shaft, wherein the rotating disk is connected to the driving shaft, an internal gear is rotatably connected in the rotating disk, a first external gear and a second external gear are arranged in the internal gear in an axially staggered meshing manner, and the first external gear is fixedly arranged, the driven shaft is coaxially fixedly connected to the second external gear, and is eccentrically arranged with the driving shaft, and one end of the driven shaft away from the second external gear is connected to the first grinding member, when the driving shaft drives the rotating disk to rotate synchronously in the first direction, the rotating disk applies a first force to the second external gear to make it rotate and a second force to rotate eccentrically in the first direction, at which time the first external gear is stationary, and applies a third force to the second external gear in the opposite direction of the rotation direction through the internal gear, and the third force is equal to the first force. Through the arrangement of the internal gear, the first external gear and the second external gear, the force that drives the driven shaft to rotate is offset, so that the driven shaft only rotates eccentrically and does not rotate, so that the first grinding member only slides relatively on the surface of the other grinding member during grinding, and the accuracy of the sealing surface will not be affected due to the inability to fit due to the rotation.

[0020] 2. The present invention provides a driving device, in which the driving shaft is a hollow cylindrical structure and a fixed shaft is provided inside. The driving shaft rotates around the fixed shaft. The first external gear is fixedly connected to the fixed shaft. The first external gear is fixedly set by the fixed shaft, and the fixed shaft supports and guides the driving shaft.

[0021] 3. The present invention provides a driving device, in which a driving shaft is connected to a first driving member through a transmission member, the first driving member is used to provide driving force for the driving shaft, and the driving force is transmitted to the driving shaft by the transmission member, which has a simple structure and is easy to operate.

[0022] 4. The present invention provides a driving device, in which one end of the driven shaft away from the second external gear is connected to the first grinding member through a connecting plate and a connecting member arranged on the connecting plate. The connecting plate is used to increase the contact area between the driven shaft and the first grinding member, and the connecting member is arranged on the connecting plate to improve the stability of the installation of the first grinding member.

[0023] 5. The present invention provides a grinding device, including the above-mentioned driving device, which drives the first grinding piece to slide relatively only on the surface of another grinding piece during grinding, and will not affect the accuracy of the sealing surface due to the inability to fit due to self-rotation. The structure is relatively simple and easy to use.

[0024] 6. In a grinding device provided by the present invention, a driving device is slidably connected to a column in the axial direction of a driving shaft through a cross arm so as to slide to connect with a first grinding member, thereby facilitating adjustment of the position of the driving device.

[0025] 7. In a grinding device provided by the present invention, a cross arm is connected to a column through a first linear drive mechanism, so that the cross arm can slide back and forth along the column. The position of the drive device can be adjusted through the first linear drive mechanism, and the operation is convenient.

[0026] 8. The present invention provides a grinding device, in which the first linear drive mechanism includes a first screw rod and a second drive member connected to one end of the first screw rod, one end of the first screw rod is connected to the drive end of the second drive member, and the second drive member is used to drive the first screw rod to rotate to adjust the position of the drive device, thereby simplifying manual operation and saving time and effort.

[0027] 9. The grinding equipment provided by the present invention is also provided with a slide table, on which a slide plate is slidably connected along an axial direction perpendicular to the driving shaft, and the second grinding member is arranged on the slide plate. The position of the second grinding member is adjusted by sliding between the slide table and the slide plate, and the operation is simple and convenient.

[0028] 10. The present invention provides a grinding device, in which a column is arranged at one end of a slide, and a second linear drive mechanism is arranged on the slide. The second linear drive mechanism is a second screw rod, and one end of the second screw rod is rotatably connected to the column, and the slide plate is connected to the second screw rod. By rotating the second screw rod, the slide plate can be slid back and forth along the slide plate to adjust the position of the second grinding part. The structure is simple and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is a schematic diagram of the overall structure of the driving device of the present invention;

[0031] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0032] Figure 3 It is a schematic diagram of the overall structure of the grinding equipment of the present invention;

[0033] Figure 4 for Figure 3 Front view cross-section of .

[0034] Description of reference numerals:

[0035] 1. Slide plate; 2. Valve body; 3. Valve disc; 4. Fixed plate; 5. Connecting plate; 6. Connecting piece; 7. Second driving piece; 8. Cross arm; 9. First screw rod; 10. Guide rail; 11. Column; 12. First driving piece; 13. Fixed shaft; 14. Transmission piece; 15. Driving shaft; 16. First external gear; 17. Internal gear; 18. Second external gear; 19. Driven shaft; 20. Slide; 21. Second screw rod; 22. Upper plate; 23. Lower plate; 24. Intermediate cylinder; 25. Mounting block. DETAILED DESCRIPTION

[0036] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0040] like Figure 1 and 2 A specific implementation of the driving device shown includes: a driving shaft 15 , a rotating disk and a driven shaft 19 .

[0041] like Figure 2As shown, the turntable includes an upper disk body 22, a lower disk body 23 and an intermediate cylinder body 24 arranged between the upper disk body 22 and the lower disk body 23, and the intermediate cylinder body 24 is detachably connected to the upper disk body 22 and the lower disk body 23 respectively by bolts, and an internal gear 17 is rotatably connected to the intermediate cylinder body 24 through a bearing, and a first external gear 16 and a second external gear 18 are axially staggered and meshed in the internal gear 17.

[0042] like Figure 1 As shown, the drive shaft 15 is a hollow cylindrical structure, and its lower end is detachably connected to the upper disk body 22 by bolts. A fixed shaft 13 is provided inside the drive shaft 15. The drive shaft 15 is connected to the first drive member 12 through a belt as a transmission member 14. The first drive member 12 is a hydraulic motor. The belt transmits the driving force generated by the hydraulic motor to the drive shaft 15, so that the drive shaft 15 rotates around the fixed shaft 13 and drives the turntable to rotate. The fixed shaft 13 passes through the upper disk body 22 and is fixedly connected to the first external gear 16, that is, the fixed shaft 13 and the first external gear 16 are both stationary.

[0043] like Figure 2 As shown, the driven shaft 19 is coaxially fixedly connected to the second external gear 18 and is eccentrically arranged with respect to the driving shaft 15. Figure 1 As shown, the lower end of the driven shaft 19 is detachably connected to a connecting plate 5 by means of screws, and a connecting member 6 for connecting to the first grinding member is provided on the connecting plate 5, and the connecting member 6 is a cylindrical pin.

[0044] like Figure 3 and 4 A specific embodiment of the grinding equipment shown is used for grinding the valve body and valve disc of a double-flap check valve, including: the above-mentioned driving device, a cross arm 8 connected to the driving device, a vertically arranged column 11 slidably connected to the cross arm 8, and a slide 20 vertically connected to the bottom of the column 11.

[0045] like Figure 3 As shown, the cross arm 8 is a hollow square tube structure, the driving shaft 15 of the driving device is arranged to penetrate the cross arm 8 vertically, and the first driving member 12 is arranged on the cross arm 8. A guide rail 10 is arranged vertically on the upper left end surface of the column 11, and the right end of the cross arm 8 is slidably connected to the guide rail 10. The column 11 is rotatably connected to the first screw rod 9 through the mounting block 25. The mounting block 25 is disassembled and connected to the top surface of the column 11 by bolts. The first screw rod 9 extends downward along the column 11 and is connected to the cross arm 8. The mounting block 25 is also provided with a second driving member 7, and the driving end of the second driving member 7 is connected to the first screw rod 9. The second driving member 7 is a motor. The first screw rod 9 is driven to rotate by the motor, and the cross arm 8 is driven to slide up and down along the column 11.

[0046] like Figure 3As shown, the upper surface of the slide 20 is slidably connected with the slide plate 1, and the slide plate 20 is also provided with a second screw rod 21. The right end of the second screw rod 21 is rotatably connected to the column 11, and the second screw rod 21 is connected to the slide plate 1. By rotating the second screw rod 21, the slide plate 1 can slide left and right along the slide plate 20.

[0047] In this embodiment, the first screw rod 9 and the second screw rod 21 are both ball screws.

[0048] like Figure 3 and 4 As shown, the first grinding part is the valve flap 3, the second grinding part is the valve body 2, the valve body 2 is arranged on the slide plate 1, the valve flap 3 is connected to the fixing plate 4, and a connecting hole is opened on the fixing plate 4 at a position corresponding to the connecting member 6, and the cylindrical pin serving as the connecting member 6 is clamped in the connecting hole.

[0049] When the valve body and valve disc of the double-flap check valve are ground using the grinding equipment with the driving device of the present embodiment, first, the valve body 2 is set on the slide plate 1, and the valve disc 3 with the fixing plate 4 is placed in the valve body 2, and the sealing surfaces of the two are in contact, and grinding paste is added to the sealing surface; then, the positions of the valve disc 3 and the valve body 2 as well as the connecting plate 5 and the connecting member 6 on the driving device are adjusted by rotating the first screw rod 9 and the second screw rod 21, and the valve disc 3 is connected to the driving device by setting the connecting member 6 in the connecting hole of the fixing plate 4; finally, the hydraulic motor is started, and the hydraulic motor drives the driving shaft 15 to rotate clockwise, and the driving shaft 15 drives the rotating The disk rotates clockwise, and the turntable applies a first force to the second external gear 18 to make it rotate clockwise and a second force to rotate eccentrically clockwise. The stationary first external gear 16 applies a force to the internal gear 17 to rotate counterclockwise, so that the internal gear 17 rotates counterclockwise in the turntable. The internal gear 17 applies a third force to the second external gear 18 to rotate counterclockwise, and the third force is equal to the first force. Therefore, under the action of the internal gear 17, the first external gear 16 and the second external gear 18, the driven shaft 19 does not rotate on its own, but only makes an eccentric movement around the drive shaft 15, and the valve flap 3 slides relatively on the valve body 2 for grinding.

[0050] As an alternative embodiment, the first external gear 16 may not be coaxially arranged with the drive shaft 15, but may be arranged on one side of the drive shaft 15, pass through the slot of the upper disk body 22 and be fixed to the column 11 so as to be in a stationary state, wherein the first external gear 16 is not arranged in contact with the slot.

[0051] As an alternative embodiment, both the first linear drive mechanism and the second linear drive mechanism may be screws.

[0052] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A driving device, characterized in that: include: Drive shaft (15); A rotating disk connected to the driving shaft (15), wherein an internal gear (17) is rotatably connected inside the rotating disk, wherein a first external gear (16) and a second external gear (18) are arranged in the internal gear (17) in an axially staggered meshing manner, and the first external gear (16) is fixedly arranged; the rotating disk comprises an upper disk body, a lower disk body, and an intermediate cylinder body arranged between the upper disk body and the lower disk body, wherein the intermediate cylinder body is detachably connected to the upper disk body and the lower disk body respectively by bolts, wherein an internal gear is rotatably connected inside the intermediate cylinder body by a bearing, and wherein the first external gear and the second external gear are arranged in the internal gear in an axially staggered meshing manner; A driven shaft (19) is coaxially fixedly connected to the second external gear (18) and eccentrically arranged with the driving shaft (15); an end of the driven shaft (19) away from the second external gear (18) is connected to the first grinding member; when the driving shaft (15) drives the rotating disk to rotate synchronously along the first direction, the rotating disk applies a first force to the second external gear (18) to make it rotate and a second force to eccentrically rotate along the first direction; at this time, the first external gear (16) is stationary and applies a third force to the second external gear (18) in the opposite direction of its rotation through the internal gear (17); and the third force is equal to the first force.

2. A driving device according to claim 1, characterized in that: The driving shaft (15) is a hollow cylindrical structure and is provided with a fixed shaft (13) inside. The driving shaft (15) rotates around the fixed shaft (13), and the first external gear (16) is fixedly connected to the fixed shaft (13).

3. A driving device according to claim 2, characterized in that: The drive shaft (15) is connected to the first drive member (12) via a transmission member (14).

4. A driving device according to any one of claims 1 to 3, characterized in that: One end of the driven shaft (19) away from the second external gear (18) is connected to the first grinding member via a connecting plate (5) and a connecting member (6) provided on the connecting plate (5).

5. A grinding device, characterized in that: The invention comprises a driving device as described in any one of claims 1 to 4.

6. A grinding device according to claim 5, characterized in that: The driving device is slidably connected to the column (11) in the axial direction of the driving shaft (15) via the cross arm (8) so as to slide to a position connected to the first grinding member.

7. A grinding device according to claim 6, characterized in that: The cross arm (8) is connected to the column (11) via a first linear drive mechanism, and driven by the first linear drive mechanism, the cross arm (8) slides reciprocatingly along the column (11).

8. A grinding device according to claim 7, characterized in that: The first linear drive mechanism comprises a first screw rod (9) and a second drive member (7) connected to one end of the first screw rod (9).

9. A grinding device according to any one of claims 6 to 8, characterized in that: A slide table (20) is also provided, on which a slide plate (1) is slidably connected along an axial direction perpendicular to the drive shaft (15), and a second grinding member is provided on the slide plate (1).

10. A grinding device according to claim 9, characterized in that: The column (11) is arranged at one end of the slide (20), and the slide (20) is provided with a second linear drive mechanism, the second linear drive mechanism comprising a second screw rod (21), one end of the second screw rod (21) is rotatably connected to the column (11), and the slide plate (1) is connected to the second screw rod (21), and the second screw rod (21) is rotated to make the slide plate (1) slide back and forth along the slide (20).

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