A grinding head assembly

Abstract

The application provides a grinding head assembly, and belongs to the technical field of machinery. The grinding head assembly can quickly adapt to different grinding wheels and solves the problem that existing assemblies are complicated to operate for adapting to different grinding wheels. The grinding head assembly comprises a connecting shaft arranged horizontally and a grinding head arranged on the front side of the connecting shaft. The grinding head comprises an outer cylinder and a main shaft rotatably arranged in the outer cylinder. The main shaft is coaxial with the connecting shaft, the front end of the main shaft extends out of the outer cylinder and is used for mounting a grinding wheel. A positioning cylinder is arranged on the outer sleeve of the connecting shaft, and the connecting shaft and the positioning cylinder are rotatably connected through a first bearing. The rear end of the outer cylinder is inserted into the front end of the positioning cylinder, and the outer cylinder and the positioning cylinder are detachably and fixedly connected through a plurality of screws. The rear end of the main shaft is circumferentially matched with the front end of the connecting shaft through a plug-in mounting connecting structure.

Description

Technical Field

[0001] This invention belongs to the field of mechanical technology and relates to a grinding head assembly, particularly a grinding wheel grinding head assembly. 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. Its structure is illustrated in the spindle structure of a hydrostatic high-speed grinding head disclosed in the Chinese Patent Database (application number: 201620161933.3). This structure includes a spindle with a motor shaft integrally formed at one end. A fixed bushing and a movable bushing are mounted on the spindle. 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 head assembly that can quickly adapt to different grinding wheels.

[0005] The objective of this invention can be achieved through the following technical solution: A grinding head assembly, characterized in that it includes a horizontally arranged connecting shaft and a grinding head disposed on the front side of the connecting shaft. The grinding head includes an outer cylinder and a main shaft rotatably disposed within the outer cylinder. The main shaft and the connecting shaft are coaxial. The front end of the main shaft extends out of the outer cylinder and is used to install a grinding wheel. A positioning cylinder is sleeved on the connecting shaft, and the two are rotatably connected by a first bearing. The rear end of the outer cylinder is inserted into the front end of the positioning cylinder, and the outer cylinder and the positioning cylinder are detachably fixed by multiple screws. The rear end of the main shaft is circumferentially fitted with the front end of the connecting shaft through a plug-in installation connection structure.

[0006] In actual use, the positioning cylinder is in a fixed state.

[0007] 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.

[0008] In the aforementioned grinding head assembly, a ring-shaped positioning seat is coaxially formed on the outer wall of the front end of the positioning cylinder, and a corresponding ring-shaped connecting seat is formed on the outer wall of the outer cylinder. A through hole runs axially through the connecting seat, and a threaded hole is provided on the positioning seat. Each through hole contains a 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 screw rotation and further facilitates grinding head replacement.

[0009] In the aforementioned grinding head assembly, the connecting structure includes a front face gear ring coaxially fixed on the main shaft 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, forming a stable and reliable circumferential connection between the main shaft and the connecting shaft, ensuring transmission accuracy and stability.

[0010] As another option, in the above-mentioned grinding head assembly, the connecting structure includes a spline hole opened on the connecting shaft and a spline column formed on the spindle, and the spline column is inserted and engaged in the spline hole.

[0011] In the aforementioned grinding head assembly, 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 main shaft and the connecting shaft becomes smoother and more precise.

[0012] In the aforementioned grinding head assembly, the axial cross-section of the connecting ring is approximately L-shaped, and the connecting ring consists of two vertically arranged ring sections. 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 fits 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 both 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.

[0013] In the above-mentioned grinding head assembly, a support ring is fitted and fixed on 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.

[0014] In the aforementioned grinding head assembly, 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.

[0015] In the aforementioned grinding head assembly, 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.

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

[0017] 1. 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 face gear ring and the rear face gear ring, the transmission between the main shaft and the connecting shaft is more stable and precise.

[0018] 2. 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

[0019] Figure 1 This is an exploded structural diagram of the grinding head assembly.

[0020] Figure 2 This is a three-dimensional structural diagram of the grinding head.

[0021] Figure 3 This is a cross-sectional view of the grinding head.

[0022] Figure 4 yes Figure 3 A magnified structural diagram of point A in the middle.

[0023] In the diagram, 1 is the grinding head; 1a is the outer cylinder; 1a1 is the connecting seat; 1b is the main shaft; 1c is the second bearing; 2 is the connecting shaft; 3 is the positioning cylinder; 3a is the positioning seat; 3b is the threaded hole; 4 is the first bearing; 5 is the front face toothed ring; 5a is the support seat; 5b is the tooth block; 6 is the rear face toothed ring; 7 is the connecting ring; 7a is the first ring part; 7b is the second ring part; 7c is the insertion port; 8 is the spring; 9 is the support ring; and 9a is the retaining ring. Implementation

[0024] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments. Example 1

[0025] like Figure 1 As shown, this grinding head assembly includes a horizontally arranged connecting shaft 2 and a grinding head 1 arranged in front of the connecting shaft 2.

[0026] Specifically

[0027] like Figure 2 and Figure 3As shown, the grinding head 1 includes an outer cylinder 1a and a main shaft 1b rotatably disposed inside the outer cylinder 1a. The rear end of the main shaft 1b is rotatably supported inside the outer cylinder 1a by a second bearing 1c. The front end of the main shaft 1b extends out of the outer cylinder 1a and is used to install a grinding wheel. The front end of the main shaft 1b is rotatably supported inside the outer cylinder 1a by a third bearing.

[0028] like Figure 1 and Figure 3 As shown, the connecting shaft 2 is coaxial with the main shaft 1b, and the positioning cylinder 3 is sleeved on the connecting shaft 2, with the two rotatably connected by the first bearing 4. The rear end of the outer cylinder 1a is inserted into the front end of the positioning cylinder 3, and the outer cylinder 1a and the corresponding positioning cylinder 3 are detachably fixed by multiple screws. The rear end of the main shaft 1b is circumferentially fitted to the front end of the connecting shaft 2 through a plug-in installation connection structure. In actual use, this application only requires rotating the screws and plugging and unplugging the main shaft 1b3b to replace different grinding heads 13 to adapt to different flanges, which has the advantages of convenient and easy operation.

[0029] In this embodiment,

[0030] The connection method between positioning cylinder 3 and outer cylinder 1a is as follows: Figure 1 and Figure 3 As shown, a ring-shaped positioning seat 3a is coaxially formed on the outer wall of the front end of the positioning cylinder 3, and the positioning seat 3a and the positioning cylinder 3 are an integral structure. A ring-shaped connecting seat 1a1 is coaxially formed on the outer wall of the outer cylinder 1a, and the connecting seat 1a1 and the outer cylinder 1a are an integral structure. A through hole runs through the connecting seat 1a1 axially, and a threaded hole 3b is provided on the positioning seat 3a axially. The number of threaded holes 3b 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 3b, and the screw head is pressed tightly against the front side of the connecting seat 1a1. 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 1.

[0031] like Figure 1 and Figure 2As shown, the connection structure includes a front gear ring 5 coaxially fixed on the main shaft 1b and a rear gear ring 6 fixed on the connecting shaft 2. The front gear ring 5 and the rear gear ring 6 are matched and meshed together, forming a stable and reliable circumferential connection between the main shaft 1b and the connecting shaft 2, ensuring transmission accuracy and stability. Preferably, both the front gear ring 5 and the rear gear ring 6 are fixed to the main shaft 1b and the connecting shaft 2 respectively by screws. To further explain, a front pin is provided between the front face gear ring 5 and the main shaft 1b. The axis of the front pin is parallel to the main shaft 1b. Both the front face gear ring 5 and the main shaft 1b are provided with a ring of insertion holes 1 that match the front pin. The two ends of the front pin are respectively locked in the corresponding insertion holes 1 to improve the coaxiality of the connection between the front face gear and the main shaft 1b. A rear pin is provided between the rear face gear ring 6 and the connecting shaft 2. The axis of the rear pin is parallel to the main shaft 1b. Both the rear face gear ring 6 and the connecting shaft 2 are provided with a ring of insertion holes 2 that match the rear pin. The two ends of the rear pin are respectively locked in the corresponding insertion holes 2 to improve the coaxiality of the connection between the rear face gear and the connecting shaft 2.

[0032] Furthermore, such as Figure 3 and Figure 4 As shown, a connecting ring 7 is coaxially arranged inside the rear end of the outer cylinder 1a. The rear end of the connecting ring 7 is circumferentially fixed and axially movable with the front toothed ring 5. A spring 8 is also provided inside the outer cylinder 1a to give the connecting ring 7 a tendency to move backward. Through the cooperation of the spring 8 and the connecting ring 7, and by using the connecting ring 7 to overcome the elastic force of the spring 8 to move forward, the meshing impact between the front toothed ring 5 and the rear toothed ring 6 is buffered, making the transmission between the main shaft 1b and the connecting shaft 2 more stable and precise.

[0033] in,

[0034] The connection ring 7 and the front face toothed ring 5 are coupled as follows: The axial cross-section of the connection ring 7 is approximately L-shaped. The connection ring 7 is an integral structure, consisting of a vertically arranged ring portion 7a and a ring portion 7b. The front face toothed ring 5 consists of a cylindrical support base 5a and a ring of toothed blocks 5b formed on the rear end face of the support base 5a, with the length of the toothed blocks 5b extending radially along the support base 5a. The ring portion 7b is located between the ring portion 7a and the toothed blocks 5b. The ring portion 7a is fitted onto the support base 5a, and the side wall of the ring portion 7b has radially penetrating slots 7c for the outer edge of the toothed blocks 5b to be inserted and engaged. The number of slots 7c and the toothed blocks 5b are the same, and their positions correspond one-to-one. The front face toothed ring 5 is inserted into the connection ring 7, 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 them, making the entire buffering process faster and the transmission between the main shaft 1b and the connecting shaft 2 smoother and more precise.

[0035] The spring 8 is installed as follows: a support ring 9 is fitted and fixed to the support base 5a. The support ring 9 is located in front of the connecting ring 7. The two ends of the spring 8 act on the support ring 9 and the connecting ring 7 respectively. Preferably, there are multiple springs 8 evenly distributed around the circumference of the support ring 9.

[0036] The positioning method of the support ring 9 is as follows: the support ring 9 is clamped and positioned between the inner ring of the second bearing 1c and the support seat 5a. That is, at this time, both ends of the support ring 9 are pressed tightly against the inner ring of the second bearing 1c and the support seat 5a, respectively. This simplifies the structure and shortens the overall length of the grinding head 1, thereby improving the grinding quality. Further, a retaining ring 9a is coaxially formed on the inner wall of the support ring 9. The retaining ring 9a is sleeved outside the support seat 5a, and the spring 8 is located outside the retaining ring 9a to separate the spring 8 from the support seat 5a, thus improving working stability. Example 2

[0037] The structure and principle of this embodiment 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 2 and a spline column formed on the main shaft 1b, and the spline column is inserted and engaged in the spline hole.

[0038] 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 head assembly, characterized in that, The device includes a horizontally arranged connecting shaft (2) and a grinding head (1) located in front of the connecting shaft (2). The grinding head (1) includes an outer cylinder (1a) and a main shaft (1b) rotatably disposed inside the outer cylinder (1a). The main shaft (1b) and the connecting shaft (2) are coaxial. The front end of the main shaft (1b) extends out of the outer cylinder (1a) and is used to install a grinding wheel. The connecting shaft (2) is fitted with a positioning cylinder (3), and the two are rotatably connected by a first bearing (4). The rear end of the outer cylinder (1a) is inserted into the front end of the positioning cylinder (3), and the outer cylinder (1a) and the positioning cylinder (3) are detachably fixed by multiple screws. The rear end of the main shaft (1b) is circumferentially fitted with the front end of the connecting shaft (2) through a plug-in installation connection structure. The connecting structure includes a front face toothed ring (5) coaxially fixed on the main shaft (1b) and a rear face toothed ring (6) fixed on the connecting shaft (2). The front face toothed ring (5) and the rear face toothed ring (6) are matched and mesh together. A connecting ring (7) is coaxially provided inside the rear end of the outer cylinder (1a). The rear end of the connecting ring (7) is circumferentially fixed and axially movable with the front toothed ring (5). A spring (8) is also provided inside the outer cylinder (1a) to make the connecting ring (7) have a tendency to move backward. The axial section of the connecting ring (7) is approximately L-shaped, and the connecting ring (7) is composed of a vertically arranged ring part one (7a) and a ring part two (7b); the front end face toothed ring (5) is composed of a cylindrical support seat (5a) and a ring of toothed blocks (5b) formed on the rear end face of the support seat (5a). The ring part one (7a) is sleeved on the outside of the support seat (5a), and the side wall of the ring part two (7b) has a radially penetrating insertion port (7c) for the outer edge of the toothed block (5b) to be inserted and meshed. The number of insertion ports (7c) and toothed blocks (5b) are the same and their positions correspond one to one.

2. The grinding head assembly according to claim 1, characterized in that, A ring-shaped positioning seat (3a) is coaxially formed on the outer wall of the front end of the positioning cylinder (3), and a ring-shaped connecting seat (1a1) is correspondingly formed on the outer wall of the outer cylinder (1a). A ring of through holes is axially passed through the connecting seat (1a1), and a ring of threaded holes (3b) is correspondingly provided on the positioning seat (3a). Each through hole is provided with the aforementioned screw, and the screw rod is screwed into the corresponding threaded hole (3b).

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

4. The grinding head assembly according to claim 1, characterized in that, A support ring (9) is fitted and fixed on the support base (5a). The support ring (9) is located in front of the connecting ring (7). The two ends of the spring (8) act on the support ring (9) and the connecting ring (7) respectively.

5. The grinding head assembly according to claim 4, characterized in that, The rear end of the main shaft (1b) is rotatably connected to the outer cylinder (1a) through the second bearing (1c), and the support ring (9) is clamped and positioned between the inner ring of the second bearing (1c) and the support seat (5a).

6. The grinding head assembly according to claim 5, characterized in that, A retaining ring (9a) is coaxially formed on the inner wall of the support ring (9). The retaining ring (9a) is sleeved outside the support seat (5a), and the spring (8) is located outside the retaining ring (9a).

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