A grinding apparatus

Abstract

This invention provides a grinding device belonging to the field of mechanical technology. It solves the problem of inconvenient operation of existing equipment due to its incompatibility with different grinding wheels. This grinding device includes a support frame, with grinding heads and a motor respectively located on the front and rear sides of the support frame. There are two grinding heads, each including an outer cylinder and a main shaft rotatably mounted inside the outer cylinder. The support frame has two mounting holes extending through the main shaft axially. Each mounting hole contains a connecting shaft and a positioning cylinder. The two connecting shafts are coaxial with the two main shafts, and the positioning cylinders are sleeved on the corresponding connecting shafts and rotatably connected by a first bearing. The positioning cylinders are fixedly connected to the support frame. The rear ends of the two outer cylinders are respectively inserted into the front ends of the two positioning cylinders. The outer cylinders and corresponding positioning cylinders are detachably fixed together by multiple screws. The rear end of the main shaft is circumferentially fitted to the front end of the corresponding connecting shaft through a plug-in connection structure. The rear end of the connecting shaft extends out of the mounting hole, and the motor is connected to the rear end of the connecting shaft through a transmission structure to drive the two connecting shafts to rotate synchronously. This grinding device is easily adaptable to different grinding wheels.

Description

Technical Field

[0001] This invention belongs to the field of mechanical technology and relates to a grinding device, particularly a grinding wheel grinding device. Background Technology

[0002] The grinding wheel head is an important component of a grinding machine, generally comprising a motor, a spindle, and a grinding wheel. The grinding wheel and motor are connected to opposite ends of the spindle, respectively. A typical example is the spindle structure of a hydrostatic high-speed grinding head disclosed in the Chinese Patent Database (application number: 201620161933.3), which includes a spindle with a motor shaft integrally formed at one end. The spindle has a fixed bushing and a movable bushing. A sleeve is fitted around the outside of the spindle, and a bearing sleeve is installed inside the sleeve, corresponding to the fixed and movable bushings. A grinding washer is placed between the movable bushing and the spindle, and the grinding washer is fitted around the outside of the spindle.

[0003] Since different types of grinding wheels require different installation methods, different spindles need to be used to adapt to the grinding wheels. However, in the aforementioned patent, the spindle serves as both the grinding wheel spindle and the motor spindle, meaning that replacing the spindle requires complete disassembly of the entire unit, making the operation extremely cumbersome. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a grinding device that can quickly adapt to different grinding wheels.

[0005] The objective of this invention can be achieved through the following technical solution: A grinding device includes a support frame, with a grinding head and a motor horizontally arranged on the front and rear sides of the support frame, two grinding heads arranged side by side, each grinding head including an outer cylinder and a main shaft rotatably disposed within the outer cylinder, the front end of the main shaft extending out of the outer cylinder and used to mount a grinding wheel, characterized in that the support frame has two mounting holes extending through the main shaft axially, each mounting hole containing a connecting shaft and a positioning cylinder, the two connecting shafts being coaxial with the two main shafts respectively, the positioning cylinders being sleeved outside the corresponding connecting shafts and rotatably connected to them via a first bearing, the positioning cylinders being fixedly connected to the support frame; the rear ends of the two outer cylinders are respectively inserted into the front ends of the two positioning cylinders, and the outer cylinders and the corresponding positioning cylinders are detachably fixedly connected by multiple screws; the rear end of the main shaft is circumferentially fitted to the front end of the corresponding connecting shaft via a plug-in installation connection structure; the rear end of the connecting shaft extends out of the mounting hole, and the motor is connected to the rear end of the connecting shaft via a transmission structure so that the motor drives the two connecting shafts to rotate synchronously.

[0006] This application allows for easy replacement of different grinding heads to fit different flanges simply by rotating the screws and plugging / unplugging the spindle, offering advantages such as convenient and effortless operation.

[0007] In the aforementioned grinding equipment, the front end of the positioning cylinder extends out of the mounting hole, and a ring-shaped positioning seat is coaxially formed on the outer wall of the front end of the positioning cylinder. A corresponding ring-shaped connecting seat is formed on the outer wall of the outer cylinder. A through hole runs through the connecting seat axially, and a threaded hole is provided on the positioning seat. Each through hole is equipped with the aforementioned screw, and the screw shank is screwed into the corresponding threaded hole. At this time, the screw is axially positioned with its head facing forward, which facilitates the screw rotation operation and further facilitates the replacement of the grinding head.

[0008] In the aforementioned grinding equipment, the connecting structure includes a front face gear ring coaxially fixed on the spindle and a rear face gear ring fixed on the connecting shaft. The front face gear ring and the rear face gear ring are matched and mesh together, so that a stable and reliable circumferential connection is formed between the spindle and the connecting shaft, ensuring transmission accuracy and stability.

[0009] As another option, in the aforementioned grinding equipment, the connecting structure includes a spline hole formed on the connecting shaft and a spline column formed on the spindle, with the spline column interlocking within the spline hole.

[0010] In the aforementioned grinding equipment, a connecting ring is coaxially mounted inside the rear end of the outer cylinder. The rear end of the connecting ring is circumferentially fixed to the front toothed ring but axially movable. A spring is also provided inside the outer cylinder to give the connecting ring a rearward tendency. Through the cooperation of the spring and the connecting ring, and by utilizing the connecting ring's forward movement against the spring force to buffer the meshing impact between the front and rear toothed rings, the transmission between the spindle and the connecting shaft becomes smoother and more precise.

[0011] In the aforementioned grinding equipment, the axial cross-section of the connecting ring is approximately L-shaped, and the connecting ring consists of a vertically arranged ring section one and a ring section two. The front face toothed ring consists of a cylindrical support base and a ring of toothed blocks formed on the rear end face of the support base. The ring section is fitted onto the outside of the support base, and radially penetrating slots on the two side walls of the ring section allow the outer edges of the toothed blocks to be inserted and meshed. The number of slots and toothed blocks are the same, and their positions correspond one-to-one. The front face toothed ring is inserted into the connecting ring, and the two achieve circumferential fixation and axial movement through their own structure. This not only simplifies the structure but also effectively shortens the distance between the two, making the overall buffering faster and the transmission between the spindle and the connecting shaft smoother and more precise.

[0012] In the aforementioned grinding equipment, a support ring is fitted and fixed to the support base. The support ring is located in front of the connecting ring, and the two ends of the spring act on the support ring and the connecting ring, respectively.

[0013] In the aforementioned grinding equipment, the rear end of the spindle is rotatably connected to the outer cylinder via a second bearing, and the support ring is clamped and positioned between the inner ring of the second bearing and the support seat. This simplifies the structure and shortens the overall length of the grinding head, thereby improving the grinding quality.

[0014] In the aforementioned grinding equipment, a retaining ring is coaxially formed on the inner wall of the support ring. The retaining ring is sleeved outside the support seat, and the spring is located outside the retaining ring to separate the spring from the support seat and improve working stability.

[0015] In the aforementioned grinding equipment, the transmission structure includes two pulleys fixed to the rear ends of two connecting shafts and a synchronous belt wound around the two pulleys, with a motor driving one of the connecting shafts to rotate.

[0016] Compared with existing technologies, this grinding equipment has the following advantages:

[0017] 1. This application allows for easy replacement of different grinding heads to fit different flanges simply by rotating the screws and plugging / unplugging the spindle, offering advantages such as convenient and easy operation.

[0018] 2. By using the spring and connecting ring in combination, and by using the connecting ring to overcome the spring force and move forward to buffer the meshing impact between the front and rear toothed rings, the transmission between the main shaft and the connecting shaft becomes smoother and more precise.

[0019] 3. The front face toothed ring is inserted into the connecting ring, and the two use their own structure to achieve circumferential fixation and axial movement. This not only has a simple structure, but also effectively shortens the distance between the two, making the entire buffering process faster and the transmission between the main shaft and the connecting shaft smoother and more precise. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the grinding equipment.

[0021] Figure 2 This is a cross-sectional structural diagram of the grinding equipment.

[0022] Figure 3 This is a three-dimensional structural diagram of the grinding head.

[0023] Figure 4 This is a cross-sectional view of the grinding head.

[0024] Figure 5 yes Figure 4 A magnified structural diagram of point A in the middle.

[0025] In the diagram, 1. Bracket; 2. Motor; 3. Grinding head; 3a. Outer cylinder; 3a1. Connecting seat; 3b. Main shaft; 3c. Second bearing; 4. Connecting shaft; 5. Positioning cylinder; 5a. Positioning seat; 5b. Threaded hole; 6. First bearing; 7. Pulley; 8. Synchronous belt; 9. Coupling; 10. Front face gear ring; 10a. Support seat; 10b. Gear block; 11. Rear face gear ring; 12. Connecting ring; 12a. Ring part one; 12b. Ring part two; 12c. Insert; 13. Spring; 14. Support ring; 14a. Retaining ring. Detailed Implementation

[0026] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings to further illustrate the technical solutions of the present invention. However, the present invention is not limited to these embodiments. Example 1

[0027] like Figure 1 As shown, this grinding equipment includes a support 1, a motor 2, and a grinding head 3. The motor 2 is horizontally positioned and fixed to the rear of the support 1; the grinding head 3 is horizontally positioned and located in front of the support 1, and there are two grinding heads 3 arranged side by side.

[0028] Specifically

[0029] like Figure 4 As shown, the grinding head 3 includes an outer cylinder 3a and a main shaft 3b rotatably disposed inside the outer cylinder 3a. The rear end of the main shaft 3b is rotatably supported inside the outer cylinder 3a by a second bearing 3c. The front end of the main shaft 3b extends out of the outer cylinder 3a and is used to install a grinding wheel. The front end of the main shaft 3b is rotatably supported inside the outer cylinder 3a by a third bearing.

[0030] like Figure 2 As shown, the bracket 1 has two mounting holes extending axially along the main shaft 3b. Each mounting hole contains a connecting shaft 4 and a positioning cylinder 5. The two connecting shafts 4 are coaxial with the two main shafts 3b. The positioning cylinder 5 is sleeved on the corresponding connecting shaft 4, and the two are rotatably connected by a first bearing 6. The positioning cylinder 5 is fixedly connected to the bracket 1. The rear ends of the two outer cylinders 3a are respectively inserted into the front ends of the two positioning cylinders 5, and the outer cylinders 3a and the corresponding positioning cylinders 5 are detachably fixed by multiple screws. The rear end of the main shaft 3b is circumferentially fitted to the front end of the corresponding connecting shaft 4 via a plug-in connection structure. The rear end of the connecting shaft 4 extends out of the mounting hole. The motor 2 is connected to the rear end of the connecting shaft 4 via a transmission structure so that the motor 2 drives the two connecting shafts 4 to rotate synchronously.

[0031] In actual use, this application only requires rotating the screw and plugging and unplugging the spindle 3b to change different grinding heads 3 to fit different flanges, which has the advantages of convenient and easy operation.

[0032] In this embodiment,

[0033] The transmission structure includes two pulleys 7 fixed to the rear ends of the two connecting shafts 4 and a synchronous belt 8 wound around the two pulleys 7. The motor 2 drives one of the connecting shafts 4 to rotate. In the actual product, the motor 2 shaft is coaxial with one of the connecting shafts 4, and the two are connected by a coupling 9.

[0034] The connection method between positioning cylinder 5 and outer cylinder 3a is as follows: Figure 2 and Figure 4As shown, the front end of the positioning cylinder 5 extends out of the mounting hole. A ring-shaped positioning seat 5a is coaxially formed on the outer wall of the front end of the positioning cylinder 5, and the positioning seat 5a and the positioning cylinder 5 are an integral structure. A ring-shaped connecting seat 3a1 is coaxially formed on the outer wall of the outer cylinder 3a, and the connecting seat 3a1 and the outer cylinder 3a are an integral structure. A through hole runs through the connecting seat 3a1 axially, and a threaded hole 5b is provided on the positioning seat 5a axially. The number of threaded holes 5b and through holes are the same and their positions correspond one-to-one. Each through hole is provided with the aforementioned screw. The screw shank is screwed into the corresponding threaded hole 5b, and the screw head is pressed tightly against the front side of the connecting seat 3a1. That is, at this time, the screw is axially positioned and the head is facing forward, which facilitates the screw rotation operation and further facilitates the replacement of the grinding head 3.

[0035] To further explain, the rear end face of the positioning seat 5a presses against the bracket 1, and preferably the positioning seat 5a is also fixed to the bracket 1 by a ring of screws.

[0036] like Figure 2 and Figure 3 As shown, the connection structure includes a front gear ring 10 coaxially fixed on the main shaft 3b and a rear gear ring 11 fixed on the connecting shaft 4. The front gear ring 10 and the rear gear ring 11 are matched and meshed together, forming a stable and reliable circumferential connection between the main shaft 3b and the connecting shaft 4, ensuring transmission accuracy and stability. Preferably, both the front gear ring 10 and the rear gear ring 11 are fixed to the main shaft 3b and the connecting shaft 4 respectively by screws. To further explain, a front pin is provided between the front face gear ring 10 and the main shaft 3b. The axis of the front pin is parallel to the main shaft 3b. Both the front face gear ring 10 and the main shaft 3b are provided with a ring of insertion holes 1 that match the front pin. Both ends of the front pin are respectively engaged in the corresponding insertion holes 1 to improve the coaxiality of the connection between the front face gear and the main shaft 3b. A rear pin is provided between the rear face gear ring 11 and the connecting shaft 4. The axis of the rear pin is parallel to the main shaft 3b. Both the rear face gear ring 11 and the connecting shaft 4 are provided with a ring of insertion holes 2 that match the rear pin. Both ends of the rear pin are respectively engaged in the corresponding insertion holes 2 to improve the coaxiality of the connection between the rear face gear and the connecting shaft 4.

[0037] Furthermore, such as Figure 4 and Figure 5 As shown, a connecting ring 12 is coaxially arranged inside the rear end of the outer cylinder 3a. The rear end of the connecting ring 12 is circumferentially fixed to the front toothed ring 10 but axially movable. A spring 13 is also provided inside the outer cylinder 3a to give the connecting ring 12 a tendency to move backward. Through the cooperation of the spring 13 and the connecting ring 12, and by using the connecting ring 12 to overcome the elastic force of the spring 13 and move forward to buffer the meshing impact between the front toothed ring 10 and the rear toothed ring 11, the transmission between the main shaft 3b and the connecting shaft 4 is made smoother and more precise.

[0038] in,

[0039] The connecting ring 12 and the front face toothed ring 10 are coupled as follows: The axial cross-section of the connecting ring 12 is approximately L-shaped. The connecting ring 12 is an integral structure, consisting of a vertically arranged ring portion 12a and a ring portion 12b. The front face toothed ring 10 consists of a cylindrical support base 10a and a ring of toothed blocks 10b formed on the rear end face of the support base 10a, with the length of the toothed blocks 10b extending radially along the support base 10a. The ring portion 12b is located between the ring portion 12a and the toothed blocks 10b. The ring portion 12a is sleeved on the outside of the support base 10a. The side wall of the ring portion 12b has radially penetrating slots 12c for the outer edge of the toothed blocks 10b to be inserted and engaged. The number of slots 12c and the toothed blocks 10b are the same, and their positions correspond one-to-one. The front face toothed ring 10 is inserted into the connecting ring 12, and the two achieve circumferential fixation and axial movement through their own structure. This not only has a simple structure, but also effectively shortens the distance between the two, making the entire buffering process faster and the transmission between the main shaft 3b and the connecting shaft 4 more stable and precise.

[0040] The spring 13 is installed as follows: a support ring 14 is fitted and fixed on the support base 10a. The support ring 14 is located in front of the connecting ring 12. The two ends of the spring 13 act on the support ring 14 and the connecting ring 12 respectively. Preferably, there are multiple springs 13, which are evenly distributed around the circumference of the support ring 14.

[0041] The positioning method of the support ring 14 is as follows: the support ring 14 is clamped and positioned between the inner ring of the second bearing 3c and the support seat 10a. That is, at this time, both ends of the support ring 14 are pressed tightly against the inner ring of the second bearing 3c and the support seat 10a, respectively. This simplifies the structure and shortens the overall length of the grinding head 3, thereby improving the grinding quality. Further, a retaining ring 14a is coaxially formed on the inner wall of the support ring 14. The retaining ring 14a is sleeved outside the support seat 10a, and the spring 13 is located outside the retaining ring 14a to separate the spring 13 from the support seat 10a, improving working stability. Example 2

[0042] The structure and principle of this embodiment are basically the same as those of embodiment one. The difference is that the transmission structure includes two gears fixed on the rear ends of the two connecting shafts 4 respectively, and the two gears mesh with each other. Example

[0043] The structure and principle of this embodiment three are basically the same as those of embodiment one. The difference is that the connection structure includes a spline hole opened on the connecting shaft 4 and a spline column formed on the main shaft 3b, and the spline column is inserted and engaged in the spline hole.

[0044] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A grinding device, comprising a support (1), with a grinding head (3) and a motor (2) horizontally arranged on the front and rear sides of the support (1), the grinding head (3) having two parts arranged side by side, the grinding head (3) comprising an outer cylinder (3a) and a spindle (3b) rotatably disposed within the outer cylinder (3a), the front end of the spindle (3b) extending out of the outer cylinder (3a) and used for mounting a grinding wheel, characterized in that, The bracket (1) has two mounting holes through the main shaft (3b) along the axial direction. Each mounting hole is provided with a connecting shaft (4) and a positioning cylinder (5). The two connecting shafts (4) are coaxial with the two main shafts (3b). The positioning cylinder (5) is sleeved on the corresponding connecting shaft (4) and the two are rotatably connected by the first bearing (6). The positioning cylinder (5) is fixedly connected to the bracket (1). The rear ends of the two outer cylinders (3a) are respectively inserted into the front ends of the two positioning cylinders (5), and the outer cylinders (3a) and the corresponding positioning cylinders (5) are detachably fixedly connected by multiple screws. The rear end of the main shaft (3b) is circumferentially fitted to the front end of the corresponding connecting shaft (4) through a plug-in installation connection structure; the rear end of the connecting shaft (4) extends out of the mounting hole, and the motor (2) is connected to the rear end of the connecting shaft (4) through a transmission structure so that the motor (2) drives the two connecting shafts (4) to rotate synchronously; the front end of the positioning cylinder (5) extends out of the mounting hole, and a ring-shaped positioning seat (5a) is coaxially formed on the outer wall of the front end of the positioning cylinder (5), and a corresponding ring-shaped connecting seat (3a1) is formed on the outer wall of the outer cylinder (3a). The connecting structure includes a front face toothed ring (10) coaxially fixed on the main shaft (3b) and a rear face toothed ring (11) fixed on the connecting shaft (4). The front face toothed ring (10) and the rear face toothed ring (11) are matched and mesh together. A connecting ring (12) is coaxially provided inside the rear end of the outer cylinder (3a). The rear end of the connecting ring (12) is circumferentially fixed and axially movable with the front toothed ring (10). A spring (13) is also provided inside the outer cylinder (3a) to make the connecting ring (12) have a tendency to move backward. The axial cross section of the connecting ring (12) is approximately L-shaped, and the connecting ring (12) is composed of a vertically arranged ring part one (12a) and a ring part two (12b); the front end toothed ring (10) is composed of a cylindrical support seat (10a) and a ring of toothed blocks (10b) formed on the rear end face of the support seat (10a). The ring part one (12a) is sleeved on the outside of the support seat (10a), and the side wall of the ring part two (12b) has a radially penetrating insertion port (12c) for the outer edge of the toothed block (10b) to be inserted and engaged. The number of insertion ports (12c) and toothed blocks (10b) are the same and their positions correspond one-to-one.

2. The grinding equipment according to claim 1, characterized in that, A through hole runs through the connecting seat (3a1) axially, and a threaded hole (5b) is provided on the positioning seat (5a) accordingly. Each through hole is provided with the aforementioned screw, and the screw shank is screwed into the corresponding threaded hole (5b).

3. The grinding equipment according to claim 1, characterized in that, A support ring (14) is fitted and fixed on the support base (10a). The support ring (14) is located in front of the connecting ring (12). The two ends of the spring (13) act on the support ring (14) and the connecting ring (12) respectively.

4. The grinding equipment according to claim 3, characterized in that, The rear end of the main shaft (3b) is rotatably connected to the outer cylinder (3a) via the second bearing (3c), and the support ring (14) is clamped and positioned between the inner ring of the second bearing (3c) and the support seat (10a).

5. The grinding equipment according to claim 4, characterized in that, A retaining ring (14a) is coaxially formed on the inner wall of the support ring (14). The retaining ring (14a) is sleeved outside the support seat (10a), and the spring (13) is located outside the retaining ring (14a).

6. The grinding equipment according to claim 1, characterized in that, The transmission structure includes two pulleys (7) fixed at the rear ends of the two connecting shafts (4) and a synchronous belt (8) wound around the two pulleys (7). The motor (2) drives one of the connecting shafts (4) to rotate.

7. The grinding equipment according to claim 1 or 2, characterized in that, The connection structure includes a spline hole opened on the connecting shaft (4) and a spline column formed on the main shaft (3b), and the spline column is inserted and engaged in the spline hole.

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