Radial floating main shaft device

Abstract

The utility model relates to a radial floating main shaft device which comprises a shaft seat, a shaft assembly, a pneumatic floating supporting assembly and an accompanying swinging supporting assembly. A shaft through hole is formed in the shaft seat; the pneumatic floating supporting assembly comprises a lifting pin fixing ring and a radial lifting pin, the lifting pin fixing ring is fixedly installed on the front portion in the shaft through hole, an annular air storage cavity is formed between the lifting pin fixing ring and the shaft base, an air inlet hole is formed in the position, corresponding to the annular air storage cavity, of the shaft base, and a plurality of lifting pin installation through holes are evenly formed in the lifting pin fixing ring in the circumferential direction in a communicating mode. A radial lifting pin is inserted into each lifting pin mounting through hole; the accompanying swinging supporting assembly comprises a swinging ring which is arranged at the rear part in the shaft through hole; the shaft assembly integrally penetrates through the shaft through hole, and the outer surface of the front part of the shaft assembly is in pressing contact with the inner end of a circle of radial lifting pins; the rear portion of the shaft seat is in swing connection with the swing ring in the first direction arranged in the radial direction, the swing ring is in swing connection with the shaft seat in the second direction arranged in the radial direction, and the two directions intersect perpendicularly. The device realizes the radial free floating of the main shaft.

Description

Technical Field

[0001] The utility model belongs to the technical field of automatic grinding equipment, and in particular relates to a radial floating spindle device. Background Art

[0002] In current automated grinding equipment, it is easy to achieve grinding of regular-shaped surfaces through program control, such as grinding of inner holes or outer surfaces with equal diameters. However, for grinding surfaces with irregular shapes, such as grinding surfaces with small protrusions partially set in the inner hole, if program control is used, there are problems such as programming difficulties and complex data processing, which will reduce the applicability of the grinding equipment and cannot better meet the grinding requirements of irregular-shaped grinding surfaces.

[0003] In order to realize convenient operation, the ideal working state is that the grinding head can perform follow-up compensation as the shape of the grinding surface changes. However, the existing spindle device for driving the grinding head is generally fixed and cannot drive the grinding head to perform follow-up compensation. Utility Model Content

[0004] The utility model aims to overcome the shortcomings of the prior art and provide a radial floating spindle device which can realize grinding follow-up compensation and improve the applicability of grinding settings.

[0005] The above-mentioned purpose of the utility model is achieved through the following technical solutions:

[0006] A radial floating spindle device, characterized in that it includes a shaft seat, a shaft assembly, a pneumatic floating support assembly, and an accompanying swing support assembly; the shaft seat is provided with a shaft through hole; the pneumatic floating support assembly includes a push pin fixing ring and a radial push pin, the push pin fixing ring is fixedly installed at a front position in the shaft through hole, and an annular air storage cavity is formed between the push pin fixing ring and the shaft seat, an air inlet hole is provided at a position corresponding to the annular air storage cavity on the shaft seat, a plurality of push pin installation through holes are evenly distributed and connected along the circumferential direction on the push pin fixing ring, and a radial push pin is sealed and inserted in each push pin installation through hole;

[0007] The accompanying swing support assembly includes a swing ring, which is arranged at a rear position in the shaft through hole;

[0008] The shaft assembly is integrally installed in the shaft through hole, and the front outer surface of the shaft assembly forms a pressing contact with the inner end of a circle of radial push pins; the rear part of the shaft assembly forms a swing connection with the swing ring in a first direction arranged radially, and the swing ring forms a swing connection with the shaft seat in a second direction arranged radially, and the first direction and the second direction intersect vertically.

[0009] Moreover, the shaft through hole adopts a stepped hole, which is composed of a large diameter hole and a small diameter hole arranged in front and behind; the ejector fixing ring is installed at the large diameter hole position of the stepped hole; and two coaxially arranged radial mounting through holes are formed at the position corresponding to the small diameter hole on the shaft seat.

[0010] Moreover, the shaft assembly includes a main shaft body, a front shaft sleeve, a rear shaft sleeve, and a middle shaft clamping ring; the front shaft sleeve, the middle shaft clamping ring and the rear shaft sleeve are mounted on the main shaft body in a front-to-rear contact manner; the middle shaft clamping ring is composed of two half rings and is clamped and connected to the main shaft body; axial threaded holes are provided at the front and rear ends of the middle shaft clamping ring, and axial screw through holes are provided on the front shaft sleeve and the rear shaft sleeve, and the front shaft sleeve, the middle shaft clamping ring and the rear shaft sleeve are fixed to the main shaft body by tightening the axial screw through hole on the front shaft sleeve and the screw in the axial threaded hole at the front end of the middle shaft clamping ring and the screw in the axial screw through hole on the rear shaft sleeve and the axial threaded hole at the rear end of the middle shaft clamping ring; two coaxial radial threaded holes are formed on the rear shaft sleeve.

[0011] Moreover, two front and rear sealing ring installation grooves are arranged on the outer ring surface of the ejector pin fixing ring, and an annular groove is arranged between the two sealing ring installation grooves, and the annular groove is aligned and connected with a plurality of ejector pin installation through holes; the ejector pin fixing ring is embedded in the large diameter hole at the front of the shaft seat, and a sealing ring is installed in each of the two sealing ring installation grooves to form a sealing contact with the inner wall of the large diameter hole, so that the inner wall of the large diameter hole and the outer surface of the ejector pin fixing ring are located between the two sealing rings to form the annular air storage chamber.

[0012] Furthermore, the swing ring is provided with two coaxial radial threaded holes at an angle of 180° and two coaxial radial mounting through holes at an angle of 180°; the axes of the two radial threaded holes and the axes of the two radial mounting through holes are arranged at an angle of 90°;

[0013] The two radial threaded holes on the swing ring are respectively aligned with the two radial mounting through holes on the shaft seat, and are respectively connected through an outer rotating shaft assembly, so that the swing ring forms a swing connection with the shaft seat along the axial direction of the two radial threaded holes; the two radial mounting through holes on the swing ring are respectively aligned with the two radial threaded holes on the rear shaft sleeve, and are respectively connected through an inner rotating shaft assembly, so that the shaft assembly forms a swing connection with the swing ring along the axial direction of the two radial threaded holes on the rear shaft sleeve.

[0014] Moreover, the outer shaft assembly and the inner shaft assembly are both composed of bearings and bolts inserted into the bearings. The bearings are fixed in corresponding radial mounting through holes, and the inner ends of the bolts are threadedly connected with corresponding radial threaded holes.

[0015] Moreover, the radial ejector pin is a stepped shaft composed of a large diameter shaft section and a small diameter shaft section, the large diameter shaft section cooperates with the large diameter hole section of the ejector pin installation through hole, the small diameter shaft section cooperates with the small diameter hole section of the ejector pin installation through hole, and extends into the inner hole of the ejector pin fixing ring. An annular groove is provided on the large diameter shaft section, a sealing ring is installed in the annular groove, and a sealing contact is formed with the ejector pin installation through hole through the sealing ring.

[0016] Moreover, a front dust cover and a rear dust cover are fixedly installed at the front and rear ends of the axle seat respectively.

[0017] The advantages and positive effects of the utility model are:

[0018] The device adds a pneumatic floating support assembly at the front position between the shaft assembly and the shaft seat, and adds a follow-up swing support assembly at the rear position; the shaft assembly is supported radially in a floating manner in the inner hole of the shaft seat. When a grinding head driven by the spindle device is used to grind irregular surfaces, the radial floating of the shaft assembly can better achieve grinding follow-up compensation, thereby improving the applicability of the grinding equipment.

[0019] The shaft assembly in the device consists of a main shaft body and a front shaft sleeve, a rear shaft sleeve, and a middle shaft clamping ring which are fixedly mounted on the outside of the main shaft body. The main shaft body is protected by the front shaft sleeve contacting and fitting with the radial ejector pin of the pneumatic floating support assembly and the rear shaft sleeve being connected with the accompanying swing support assembly.

[0020] The pneumatic floating support assembly and accompanying swing support assembly in the device have the advantages of fewer components, convenient assembly and reliable use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional diagram of the overall appearance of the utility model;

[0022] Figure 2 It is a front view of the utility model;

[0023] Figure 3 yes Figure 2 AA section view

[0024] Figure 4 It is a left view of the utility model;

[0025] Figure 5 yes Figure 4 BB cross-sectional view. DETAILED DESCRIPTION

[0026] The structure of the utility model is further described below with reference to the accompanying drawings and through embodiments. It should be noted that the embodiments are descriptive rather than restrictive.

[0027] A radially floating spindle device, see Figure 1-Figure 5 , mainly including shaft seat 3, spindle body 1.1, ejector pin fixing ring 5, radial ejector pin 6, front shaft sleeve 1.2, rear shaft sleeve 1.4, middle shaft clamping ring 1.3 and swing ring 9. The spindle body can be a pneumatic spindle or an electric spindle or any execution tool.

[0028] The shaft seat is the basic part of the main shaft device, and a shaft through hole is arranged on the shaft seat. The shaft through hole further adopts a stepped hole, which is composed of a large diameter hole and a small diameter hole arranged in front and behind. The large diameter hole is used to position and install the ejector fixing ring. A radial through hole is arranged in the middle position corresponding to the large diameter hole on the shaft seat, forming an air inlet hole 3.1. The air inlet hole is connected to the air inlet pipe and connected to the external air supply device through the air inlet pipe. Two coaxially arranged radial installation through holes are formed on the shaft seat at the position corresponding to the small diameter hole.

[0029] The front sleeve, the middle shaft clamping ring and the rear sleeve are mounted on the main shaft body in a front-to-back contact manner. The middle shaft clamping ring is composed of two half rings, which are buckled on the outside of the main shaft body and connected by screws on both sides to fasten the middle shaft clamping ring to the main shaft body. Axial threaded holes are provided at the front and rear ends of the middle shaft clamping ring, and axial screw through holes are provided on the front sleeve and the rear sleeve. By fastening the screws in the axial screw through holes on the front sleeve and the axial threaded holes at the front end of the middle shaft clamping ring and the axial screw through holes on the rear sleeve and the axial threaded holes at the rear end of the middle shaft clamping ring, the front sleeve, the middle shaft clamping ring and the rear sleeve are fixedly connected, and finally the front sleeve, the middle shaft clamping ring and the rear sleeve are fixed to the main shaft body, wherein the front sleeve and the rear sleeve protect the main shaft body. The front shaft sleeve, the middle shaft clamping ring, the rear shaft sleeve and the main shaft body constitute a shaft assembly 1. The shaft assembly is inserted into the shaft through hole of the shaft seat. In addition, two coaxial radial threaded holes are formed on the rear shaft sleeve.

[0030] The ejector pin fixing ring is used to realize the uniform installation of multiple radial ejector pins along the circumferential direction. The outer ring surface of the ejector pin fixing ring is provided with two front and rear sealing ring installation grooves, and an annular groove is provided between the two sealing ring installation grooves. Multiple ejector pin installation through holes 5.1 are uniformly provided along the circumferential direction on the ejector pin fixing ring, and the multiple ejector pin installation through holes are provided at positions aligned with and connected to the annular groove. In addition, multiple axial threaded holes are provided on the ejector pin fixing ring at the outer periphery of the inner ring along the circumferential direction, which are used to realize the fixing of the ejector pin fixing ring on the shaft seat.

[0031] The ejector pin fixing ring is embedded in the large diameter hole at the front of the shaft seat, and a sealing ring 7 is installed in each of the two sealing ring installation grooves to form a sealing contact with the inner wall of the large diameter hole, so that the inner wall of the large diameter hole and the outer surface of the ejector pin fixing ring are located between the two sealing rings to form an annular air storage cavity, and the air inlet hole is connected to the annular air storage cavity. A radial ejector pin is sealed and inserted in each ejector pin installation through hole on the ejector pin fixing seat, and the inner end of the radial ejector pin is the ejection pressure end that contacts the outer surface of the front main shaft sleeve. The specific structural forms that can be adopted are:

[0032] The ejector pin installation through hole is a stepped hole with a large outside and a small inside; the radial ejector pin is a stepped shaft composed of a large diameter shaft section and a small diameter shaft section, the large diameter shaft section cooperates with the large diameter hole section of the ejector pin installation through hole, and the small diameter shaft section cooperates with the small diameter hole section of the ejector pin installation through hole, and extends into the inner hole of the ejector pin fixing ring. An annular groove is provided on the large diameter shaft section, and a sealing ring 8 is installed in the annular groove, and a sealing contact is formed with the ejector pin installation through hole through the sealing ring.

[0033] The ejector pin fixing ring and the radial ejector pin are combined to form a pneumatic floating support assembly to achieve radial floating support for the front part of the shaft assembly.

[0034] The swing ring is sleeved on the outside of the rear sleeve with a set fitting clearance, and is arranged in the small diameter hole of the shaft seat with a set fitting clearance. The swing ring is provided with two coaxial radial threaded holes at 180° and two coaxial radial mounting through holes at 180°. The axes of the two radial threaded holes are arranged at an angle of 90° to the axes of the two radial mounting through holes.

[0035] The two radial threaded holes on the swing ring are respectively aligned with the two radial mounting through holes on the shaft seat, and are respectively connected through an outer rotating shaft assembly, so that the swing ring forms a relatively swingable connection with the shaft seat along the axial direction of the two radial threaded holes, and this direction can be defined as the X direction (the second direction). The two radial mounting through holes on the swing ring are respectively aligned with the two radial threaded holes on the rear shaft sleeve, and are respectively connected through an inner rotating shaft assembly, so that the shaft assembly forms a relatively swingable connection with the swing ring along the axial direction of the two radial threaded holes on the rear shaft sleeve, and this direction can be defined as the Y direction (the first direction). Among them, the outer rotating shaft assembly and the inner rotating shaft assembly can adopt the same structural form, both of which are composed of a bearing 10 and a bolt 11 installed in the bearing, the bearing is fixed in the corresponding radial mounting through hole, and the inner end of the bolt forms a threaded connection with the corresponding radial threaded hole.

[0036] The above-mentioned swing ring is connected with the shaft seat and the rear shaft sleeve through two outer rotating shaft assemblies and two inner rotating shaft assemblies to form a traveling swing support assembly.

[0037] By means of the front pneumatic floating support assembly and the rear accompanying swing support assembly, the main shaft body is radially floatingly supported in the shaft seat within a range of 360°.

[0038] In addition to the above technical features, threaded holes are evenly distributed along the circumferential direction on the front and rear ends of the shaft seat, located on the periphery of the shaft through hole, for installing the front dust cover 2 and the rear dust cover 4 respectively by screws, thereby achieving the front and rear dust-proof effect.

[0039] The front end of the main shaft body of the radial floating main shaft device is a power output end, and according to actual use conditions, grinding tools such as cylindrical grinding wheels and flap wheels can be connected.

[0040] Although the embodiments and drawings of the present invention are disclosed for illustrative purposes, those skilled in the art will appreciate that various substitutions, changes and modifications are possible without departing from the spirit of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A radial floating spindle device, characterized in that: It includes an axle seat, an axle assembly, a pneumatic floating support assembly, and an accompanying swing support assembly; the axle seat is provided with an axle through hole; the pneumatic floating support assembly includes a push pin fixing ring and a radial push pin, the push pin fixing ring is fixedly installed at the front position in the axle through hole, and forms an annular air storage cavity with the axle seat, an air inlet hole is provided at a position corresponding to the annular air storage cavity on the axle seat, a plurality of push pin installation through holes are evenly distributed and connected along the circumferential direction on the push pin fixing ring, and a radial push pin is sealed and inserted in each push pin installation through hole; the accompanying swing support assembly includes a swing ring, which is provided at the rear position in the axle through hole; The shaft assembly is integrally installed in the shaft through hole, and the front outer surface of the shaft assembly forms a pressing contact with the inner end of a circle of radial push pins; the rear part of the shaft assembly forms a swing connection with the swing ring in a first direction arranged radially, and the swing ring forms a swing connection with the shaft seat in a second direction arranged radially, and the first direction and the second direction intersect vertically.

2. The radial floating spindle device according to claim 1, characterized in that: The shaft through hole adopts a stepped hole, which is composed of a large diameter hole and a small diameter hole arranged in front and behind; the ejector fixing ring is installed at the large diameter hole position of the stepped hole; and two coaxially arranged radial mounting through holes are formed at the position corresponding to the small diameter hole on the shaft seat.

3. The radial floating spindle device according to claim 2, characterized in that: The shaft assembly includes a main shaft body, a front shaft sleeve, a rear shaft sleeve, and a middle shaft clamping ring; the front shaft sleeve, the middle shaft clamping ring and the rear shaft sleeve are mounted on the main shaft body in a front-to-rear contact manner; the middle shaft clamping ring consists of two half rings and is clamped and connected to the main shaft body; axial threaded holes are provided at the front and rear ends of the middle shaft clamping ring, and axial screw through holes are provided on the front shaft sleeve and the rear shaft sleeve, and the front shaft sleeve, the middle shaft clamping ring and the rear shaft sleeve are fixed to the main shaft body by tightening the screws in the axial screw through holes on the front shaft sleeve and the axial threaded holes at the front end of the middle shaft clamping ring, and the axial screw through holes on the rear shaft sleeve and the axial threaded holes at the rear end of the middle shaft clamping ring; two coaxial radial threaded holes are formed on the rear shaft sleeve.

4. The radial floating spindle device according to claim 2, characterized in that: Two front and rear sealing ring installation grooves are arranged on the outer ring surface of the ejector pin fixing ring, and an annular groove is arranged between the two sealing ring installation grooves, and the annular groove is aligned and connected with a plurality of ejector pin installation through holes; the ejector pin fixing ring is embedded in the large diameter hole at the front of the shaft seat, and a sealing ring is installed in each of the two sealing ring installation grooves to form a sealing contact with the inner wall of the large diameter hole, so that the inner wall of the large diameter hole and the outer surface of the ejector pin fixing ring are located between the two sealing rings to form the annular air storage cavity.

5. The radial floating spindle device according to claim 3, characterized in that: The swing ring is provided with two coaxial radial threaded holes at an angle of 180° and two coaxial radial mounting through holes at an angle of 180°; the axes of the two radial threaded holes and the axes of the two radial mounting through holes are arranged at an angle of 90°; The two radial threaded holes on the swing ring are respectively aligned with the two radial mounting through holes on the shaft seat, and are respectively connected through an outer rotating shaft assembly, so that the swing ring forms a swing connection with the shaft seat along the axial direction of the two radial threaded holes; the two radial mounting through holes on the swing ring are respectively aligned with the two radial threaded holes on the rear shaft sleeve, and are respectively connected through an inner rotating shaft assembly, so that the shaft assembly forms a swing connection with the swing ring along the axial direction of the two radial threaded holes on the rear shaft sleeve.

6. The radial floating spindle device according to claim 5, characterized in that: The outer shaft assembly and the inner shaft assembly are both composed of bearings and bolts inserted into the bearings. The bearings are fixed in corresponding radial mounting through holes, and the inner ends of the bolts are threadedly connected with the corresponding radial threaded holes.

7. The radial floating spindle device according to claim 1, characterized in that: The radial ejector pin is a stepped shaft consisting of a large diameter shaft section and a small diameter shaft section. The large diameter shaft section cooperates with the large direct hole section of the ejector pin installation through hole, and the small diameter shaft section cooperates with the small diameter hole section of the ejector pin installation through hole, and extends into the inner hole of the ejector pin fixing ring; an annular groove is provided on the large diameter shaft section, and a sealing ring is installed in the annular groove, and a sealing contact is formed with the ejector pin installation through hole through the sealing ring.

8. The radial floating spindle device according to claim 1, characterized in that: A front dust cover and a rear dust cover are respectively fixedly installed at the front and rear ends of the axle seat.

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