Grinding head assembly

Abstract

The utility model discloses a grinding head assembly which aims to optimize a sealing structure between a cover body and a seat body and is convenient to maintain, the grinding head assembly comprises a main shaft, a shaft sleeve, a grinding head seat and a grinding block, the main shaft is sleeved with the shaft sleeve, the lower portion of the shaft sleeve is fixedly connected with the grinding head seat, the main shaft drives the grinding head seat to rotate through the shaft sleeve, and the grinding block is fixedly connected with the grinding head seat through the shaft sleeve. The grinding block is arranged on the grinding head seat; the grinding head seat comprises a cover body and a seat body, the cover body is rotatably connected with the upper part of the shaft sleeve, the seat body is fixedly connected with the lower part of the shaft sleeve, the seat body is rotatably connected with the main shaft, the seat body is provided with an annular first assembly surface, the cover body is provided with an annular second assembly surface, and the seat body is fixedly connected with the shaft sleeve. The base body is fixedly connected with the cover body, the first assembling face makes contact with the second assembling face, and the first assembling face and the second assembling face are sealed through a first sealing ring.

Description

Technical Field

[0001] The utility model belongs to the technical field of grinding and polishing, and more specifically relates to a grinding head assembly. Background Art

[0002] Patent 201520240332.7 discloses a grinding head device, including a grinding head revolution system and a grinding block seat swing system. The grinding head revolution system includes a grinding head spindle, a grinding head spindle connecting sleeve, and a grinding head lower housing. The grinding head spindle is connected to the grinding head lower housing via the grinding head spindle connecting sleeve, and the grinding head spindle drives the grinding head lower housing to rotate via the grinding head spindle connecting sleeve.

[0003] In the above-mentioned grinding head device, the grinding head lower box is composed of two parts, including a cover and a base. The cover and the base are generally connected by bolts, and the contact surface of the cover and the base is bonded with sealant to achieve sealing;

[0004] However, in practice, it is found that the sealant is difficult to remove after solidification, and it is extremely difficult to disassemble and maintain it. It also needs to be reapplied every time it is assembled, which brings a lot of inconvenience. Utility Model Content

[0005] The main purpose of the utility model is to provide a grinding head assembly, aiming to optimize the sealing structure between the cover body and the base body for easy maintenance.

[0006] According to the first aspect of the present utility model, a grinding head assembly is provided, including a main shaft, a sleeve, a grinding head seat and a grinding block, the sleeve is sleeved on the main shaft, the lower part of the sleeve is fixedly connected to the grinding head seat, the main shaft drives the grinding head seat to rotate through the sleeve, and the grinding block is arranged on the grinding head seat; the grinding head seat includes a cover body and a seat body, the cover body is rotatably connected to the upper part of the sleeve, the seat body is fixedly connected to the lower part of the sleeve, the seat body is rotatably connected to the main shaft, the seat body has an annular first assembly surface, the cover body has an annular second assembly surface, the seat body is fixedly connected to the cover body and allows the first assembly surface to contact the second assembly surface, and the first assembly surface and the second assembly surface are sealed by a first sealing ring.

[0007] In the above-mentioned grinding head assembly, an annular groove is provided on the first assembly surface or the second assembly surface, and the first sealing ring is located in the annular groove.

[0008] In the above-mentioned grinding head assembly, the cross-sectional outer contour of the first sealing ring is a rectangle.

[0009] In the above-mentioned grinding head assembly, the base body and the cover body are fixedly connected by a first locking component. The first locking component passes through the first assembly surface and the second assembly surface to press the base body and the cover body together. The first sealing ring is located on the side of the first locking component close to the main shaft.

[0010] In the above-mentioned grinding head assembly, the grinding head seat is provided with a swing mechanism, the grinding block is connected to the swing mechanism, and the swing mechanism drives the grinding block to swing;

[0011] The swing mechanism includes a waveform cam, a rotating shaft, an active swing arm, a grinding block seat and a connecting flange, the waveform cam is transmission-connected to the shaft sleeve, the connecting flange is fixed to the seat body, the rotating shaft passes through the connecting flange and is rotationally connected to the seat body, the grinding block seat is arranged on the rotating shaft, the grinding block is arranged on the grinding block seat, the active swing arm is located in the grinding head seat and fixed on the rotating shaft, and the waveform cam drives the active swing arm to swing, so that the grinding block seat swings;

[0012] A second sealing ring is sleeved on the rotating shaft. The second sealing ring is located between the rotating shaft and the connecting flange. The second sealing ring is a V-shaped sealing ring or a Y-shaped sealing ring.

[0013] In the above-mentioned grinding head assembly, the connecting flange includes a flange plate and a connecting sleeve, the connecting sleeve is inserted on the base body, the flange plate is located outside the base body and is fixedly connected to the base body, and a third sealing ring is provided between the flange plate and the base body.

[0014] One of the above technical solutions of the utility model has at least one of the following advantages or beneficial effects:

[0015] In the present invention, a sealing ring is used to seal between the cover body and the base body. The sealing ring can be removed at any time, which is more convenient for later maintenance. Moreover, the sealing ring is not easy to fail and does not need to be replaced frequently. Compared with sealant, the sealing ring greatly reduces the difficulty of disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0017] Figure 1 It is a structural diagram of the first embodiment of the utility model;

[0018] Figure 2 This is a structural cross-sectional view of the first embodiment of the present utility model;

[0019] Figure 3 This is the first embodiment of the utility model Figure 2 A partial enlarged view of A;

[0020] Figure 4 This is the first embodiment of the utility model Figure 2 A partial enlarged view of B.

[0021] Among them, the reference numerals of each figure are:

[0022] 1. Spindle; 2. Bushing; 3. Grinding head seat; 31. Cover; 32. Seat; 321. Annular groove; 4. Grinding block; 5. First sealing ring; 6. Swing mechanism; 61. Wave cam; 62. Rotating shaft; 63. Active rocker arm; 64. Grinding block seat; 65. Connecting flange; 651. Flange; 652. Connecting sleeve; 7. Second sealing ring; 8. Third sealing ring. DETAILED DESCRIPTION

[0023] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be understood as limiting the present invention.

[0024] The following disclosure provides many different embodiments or examples for implementing different solutions of the present invention.

[0025] Reference Figures 1 to 4 As shown, a grinding head assembly includes a main shaft 1, a sleeve 2, a grinding head seat 3 and a grinding block 4. The sleeve 2 is sleeved on the main shaft 1, and the lower part of the sleeve 2 is fixedly connected to the grinding head seat 3. The main shaft 1 drives the grinding head seat 3 to rotate through the sleeve 2, and the grinding block 4 is arranged on the grinding head seat 3; the grinding head seat 3 includes a cover body 31 and a seat body 32, the cover body 31 is rotatably connected to the upper part of the sleeve 2, the seat body 32 is fixedly connected to the lower part of the sleeve 2, and the seat body 32 is rotatably connected to the main shaft 1, the seat body 32 has an annular first assembly surface, the cover body 31 has an annular second assembly surface, the seat body 32 is fixedly connected to the cover body 31 and allows the first assembly surface to contact the second assembly surface, and the first assembly surface and the second assembly surface are sealed by a first sealing ring 5;

[0026] The base 32 is provided with a first concave cavity, and the first assembly surface surrounds the first concave cavity. The cover 31 is provided with a second concave cavity, and the second assembly surface surrounds the second concave cavity. After the first assembly surface and the second assembly surface come into contact, the first and second concave cavities merge into a chamber, and the transmission structure is basically located in the chamber. The chamber is filled with grease for lubricating the transmission structure. Therefore, the first and second assembly surfaces need to be in sealed contact to prevent grease leakage.

[0027] A sealing ring is used to seal between the cover body 31 and the base body 32. The sealing ring can be removed at any time, which is more convenient for later maintenance. Moreover, the sealing ring is not easy to fail and does not need to be replaced frequently. Compared with sealant, the sealing ring greatly reduces the difficulty of disassembly and assembly.

[0028] Specifically, an annular groove 321 is provided on the first assembly surface, and the first sealing ring 5 is located in the annular groove 321, which can locate the position of the first sealing ring 5 and facilitate installation.

[0029] In some other embodiments, the annular groove 321 may also be provided on the second assembly surface.

[0030] In this embodiment, the cross-sectional outer contour of the first sealing ring 5 is rectangular, which can increase the contact area and ensure the sealing effect.

[0031] In some other embodiments, the cross-sectional outer contour of the first sealing ring 5 may also be circular or elliptical.

[0032] In this embodiment, the base body 32 and the cover body 31 are fixedly connected by a first locking accessory (not shown in the figure). The first locking accessory is a bolt or a screw. The first locking accessory passes through the first assembly surface and the second assembly surface to press the base body 32 and the cover body 31 together. The first sealing ring 5 is located on the side of the first locking accessory close to the main shaft 1, so that grease can be well sealed by the first sealing ring 5 and will not penetrate into the first locking accessory.

[0033] In this embodiment, a swing mechanism 6 is provided on the grinding head seat 3, and the grinding block 4 is connected to the swing mechanism 6, which drives the grinding block 4 to swing;

[0034] The swing mechanism 6 includes a waveform cam 61, a rotating shaft 62, an active rocker arm 63, a grinding block seat 64 and a connecting flange 65. The waveform cam 61 is connected to the shaft sleeve 2 by transmission. A gear transmission mechanism is provided inside the grinding head seat 3. The shaft sleeve 2 rotates to allow the gear transmission mechanism to operate, thereby driving the waveform cam 61 to rotate. The connecting flange 65 is fixed to the seat body 32. The rotating shaft 62 passes through the connecting flange 65 and is rotatably connected to the seat body 32. The grinding block seat 64 is provided on the rotating shaft 62. The grinding block 4 is provided on the grinding block seat 64. The active rocker arm 63 is located in the grinding head seat 3 and is fixed on the rotating shaft 62. The rotation of the waveform cam 61 can push the active rocker arm 63 to swing, so that the grinding block seat 64 swings, and the grinding block 4 swings along with the grinding block seat 64 to perform grinding and polishing.

[0035] A second sealing ring 7 is sleeved on the rotating shaft 62, and the second sealing ring 7 is located between the rotating shaft 62 and the connecting flange 65. The second sealing ring 7 is a V-shaped sealing ring or a Y-shaped sealing ring, so as to prevent grease from leaking from between the rotating shaft 62 and the connecting flange 65; a skeleton oil seal is generally set on the traditional grinding head rotating shaft 62 to prevent oil leakage, but since the grinding block 4 is subjected to great force during grinding and polishing, the rotating shaft 62 will also vibrate, the skeleton of the skeleton oil seal is easy to deform, and its spring is easy to fail, so the skeleton oil seal is prone to oil leakage; the second sealing ring 7 still relies on an elastomer to contact and seal the rotating shaft 62, and is not easy to fail during the long-term vibration of the rotating shaft 62, and has a better sealing effect.

[0036] In this embodiment, the connecting flange 65 includes a flange 651 and a connecting sleeve 652. The connecting sleeve 652 is inserted into the base 32. The flange 651 is located outside the base 32 and is fixedly connected to the base 32. A third sealing ring 8 is provided between the flange 651 and the base 32 to prevent grease from leaking from between the flange 651 and the base 32.

[0037] Specifically, an annular groove is provided on the side of the flange 651 close to the base 32, and the third sealing ring 8 is located in the groove. The flange 651 is pressed tightly onto the base 32, squeezing the third sealing ring 8 to achieve sealing;

[0038] The flange 651 is locked to the base 32 through a second locking component, which is a screw or bolt. The third sealing ring 8 is located on the side of the second locking component close to the connecting sleeve 652 to prevent grease from seeping out of the second locking component.

[0039] In this embodiment, the third sealing ring 8 is an O-ring.

[0040] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A grinding head assembly, comprising a main shaft, a sleeve, a grinding head seat and a grinding block, wherein the sleeve is sleeved on the main shaft, the lower portion of the sleeve is fixedly connected to the grinding head seat, the main shaft drives the grinding head seat to rotate through the sleeve, and the grinding block is arranged on the grinding head seat; characterized in that: The grinding head seat includes a cover body and a seat body, the cover body is rotatably connected to the upper part of the sleeve, the seat body is fixedly connected to the lower part of the sleeve, the seat body is rotatably connected to the main shaft, the seat body has an annular first assembly surface, the cover body has an annular second assembly surface, the seat body is fixedly connected to the cover body and allows the first assembly surface to contact the second assembly surface, and the first assembly surface and the second assembly surface are sealed by a first sealing ring.

2. The grinding head assembly according to claim 1, characterized in that An annular groove is provided on the first assembly surface or the second assembly surface, and the first sealing ring is located in the annular groove.

3. The grinding head assembly according to claim 1 or 2, characterized in that: The cross-sectional outer contour of the first sealing ring is a rectangle.

4. The grinding head assembly according to claim 1, characterized in that The base body and the cover body are fixedly connected by a first locking component. The first locking component passes through the first assembly surface and the second assembly surface to press the base body and the cover body together. The first sealing ring is located on the side of the first locking component close to the main shaft.

5. The grinding head assembly according to claim 1, characterized in that The grinding head seat is provided with a swing mechanism, the grinding block is connected to the swing mechanism, and the swing mechanism drives the grinding block to swing; The swing mechanism includes a waveform cam, a rotating shaft, an active swing arm, a grinding block seat and a connecting flange, the waveform cam is transmission-connected to the shaft sleeve, the connecting flange is fixed to the seat body, the rotating shaft passes through the connecting flange and is rotationally connected to the seat body, the grinding block seat is arranged on the rotating shaft, the grinding block is arranged on the grinding block seat, the active swing arm is located in the grinding head seat and fixed on the rotating shaft, and the waveform cam drives the active swing arm to swing, so that the grinding block seat swings; A second sealing ring is sleeved on the rotating shaft. The second sealing ring is located between the rotating shaft and the connecting flange. The second sealing ring is a V-shaped sealing ring or a Y-shaped sealing ring.

6. The grinding head assembly according to claim 5, characterized in that The connecting flange includes a flange plate and a connecting sleeve. The connecting sleeve is inserted into the base body. The flange plate is located outside the base body and is fixedly connected to the base body. A third sealing ring is provided between the flange plate and the base body.

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