High speed internal grinding wheel adapter

Abstract

The utility model provides a kind of high-speed internal grinding wheel connecting rod, belong to mechanical technical field.It has solved the problem of high scrap cost of existing connecting rod.The high-speed internal grinding wheel connecting rod is installed in the front end of main shaft, including the connecting rod body being arranged in the front side of main shaft and being coaxial with main shaft, the front end of connecting rod body is provided with threaded hole one in axial direction, outer thread is arranged on the rear end of connecting rod body, annular connecting flange is arranged between connecting rod body and main shaft, connecting flange and main shaft are coaxially arranged and can be detachably fixed;Inner thread matched with outer thread is arranged on the inner hole wall of connecting flange, the rear end of connecting rod body is inserted into connecting flange and the both are connected together by inner thread and outer thread engagement.The high-speed internal grinding wheel connecting rod has low scrap cost.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical technology and relates to a grinding wheel connector, particularly a high-speed internal grinding wheel connector. Background Technology

[0002] The high-speed internal grinding wheel connector is a core component of the internal grinding system, and its performance directly affects the machining accuracy and efficiency.

[0003] Existing connecting rod structures, such as the internal grinding tool holder for directly mounting a grinding wheel disclosed in the Chinese Patent Database (application number: 201910396642.0), include an internal grinding tool holder connecting a stepped cylinder D, a washer, and a nut. The grinding wheel shaft of the necked step of the internal grinding tool holder has a conical surface C with the same taper as the inner hole of the internal grinding wheel. The radial runout of the conical surface C relative to the common axis of the tool holder is less than 0.005 mm. The grinding wheel is directly mounted and positioned on the conical surface C and pressed with a washer and nut. Furthermore, the outer circle of the stepped cylinder D at the rear end of the root of the internal grinding tool holder has a symmetrical structure of polygons with axisymmetric distribution. The perpendicularity between the plane of the nut at the shaft end that presses the grinding wheel and the internal thread hole of the nut is less than 0.03 mm.

[0004] In actual installation, the tool holder is screwed directly into the machine tool spindle via a thread. However, during use, the thread may jam under external force, causing the tool holder and spindle to lock and become difficult to separate. In severe cases, the spindle may even need to be scrapped, resulting in high costs. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a high-speed internal grinding wheel connector that can reduce scrapping costs.

[0006] The objective of this utility model can be achieved through the following technical solution: A high-speed internal grinding wheel connector is installed at the front end of a spindle, comprising a connector body disposed on the front side of the spindle and coaxial with the spindle, the front end of the connector body having an axially threaded hole, and the rear end of the connector body having an external thread, characterized in that an annular connecting flange is provided between the connector body and the spindle, the connecting flange and the spindle being coaxially disposed and detachably fixed together; the inner wall of the connecting flange having an internal thread matching the external thread, the rear end of the connector body being inserted into the connecting flange and the two being connected together by the engagement of the internal and external threads.

[0007] The spindle and the connecting rod body are connected by a connecting flange, and the connecting rod body is directly threaded onto the connecting flange. This way, even if the threads get stuck, it is only necessary to separate the connecting flange and the spindle. Thus, the scrapped spindle can be replaced by the assembly of the scrapped connecting flange and the connecting rod body, effectively reducing the scrap cost.

[0008] In the aforementioned high-speed internal grinding wheel connector, the connecting flange is pressed onto the front end face of the spindle. The connecting flange is detachably fixed to the spindle by a ring of bolts, and the ring of bolts is evenly distributed around the circumference of the spindle, which has the advantages of stable connection and convenient assembly and disassembly.

[0009] In the aforementioned high-speed internal grinding wheel connector, a ring coaxial with the connecting flange is formed on the rear end face of the connecting flange. The shape and size of the ring match the inner hole of the front end of the spindle. The ring is inserted into the inner hole of the front end of the spindle and is used for connecting flange installation guidance, which facilitates disassembly and assembly.

[0010] In the aforementioned high-speed internal grinding wheel connector, an interference fit is formed between the outer wall of the ring and the inner wall of the front end of the spindle. This ensures that when an external force is applied to pull out the ring, a detachable connection is formed between the connecting flange and the spindle. At the same time, it strengthens the coaxiality of the connection between the connecting flange and the spindle, thereby ensuring the rotational accuracy of the connector and improving the product processing quality and precision.

[0011] In the aforementioned high-speed internal grinding wheel connector, the outer diameter of the connecting flange is larger than the outer diameter of the front end of the spindle, so that the outer edge of the connecting flange is not obstructed. In actual maintenance, the outer edge of the connecting flange can be gripped by a hydraulic puller to disengage the ring from the spindle.

[0012] In the aforementioned high-speed internal grinding wheel connector, a ring-shaped limiting seat is formed on the outer wall of the rear end of the connector body, and the rear end face of the limiting seat presses against the connecting flange to play a limiting role, so that the connector body can be screwed into place in one go, which is convenient for assembly.

[0013] In the aforementioned high-speed internal grinding wheel connector, an annular groove is formed on the inner wall of the connecting flange. The annular groove and the connecting flange are coaxially arranged, and the front end of the internal thread extends into the annular groove. The annular groove is used for tool retraction during thread cutting.

[0014] In the aforementioned high-speed internal grinding wheel connector, the connecting flange is an integral structure, effectively ensuring its own strength.

[0015] Compared with existing technologies, this high-speed internal grinding wheel connector has the following advantages:

[0016] 1. The spindle and the connecting rod body are connected by a connecting flange, and the connecting rod body is directly threaded onto the connecting flange. In this way, even if the threads get stuck, it is only necessary to separate the connecting flange and the spindle. Thus, the scrapped spindle can be replaced by the assembly of the scrapped connecting flange and the connecting rod body, effectively reducing the scrap cost.

[0017] 2. An interference fit is formed between the outer wall of the ring and the inner wall of the front end of the spindle. This ensures that the ring can be pulled out by applying external force to form a detachable fixed connection between the connecting flange and the spindle. It also strengthens the coaxiality of the connection between the connecting flange and the spindle, ensuring the rotation accuracy of the connecting rod and improving the product processing quality and precision. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the installation of the high-speed internal grinding wheel connector.

[0019] Figure 2 This is a schematic cross-sectional view of the installation of the high-speed internal grinding wheel connector.

[0020] Figure 3 This is a cross-sectional schematic diagram of the high-speed internal grinding wheel connector.

[0021] In the diagram, 1. Main shaft; 2. Connecting rod body; 2a. Threaded hole one; 2b. Annular step; 2c. Limiting seat; 3. Grinding wheel; 4. Connecting flange; 4a. Ring part; 4b. Annular groove; 5. Bolt. Detailed Implementation

[0022] 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.

[0023] like Figure 1 As shown, the high-speed internal grinding wheel connector is installed at the front end of the spindle 1, and includes a connector body 2 that is located on the front side of the spindle 1 and is coaxial with the spindle 1.

[0024] in,

[0025] The connecting rod body 2 is straight. A threaded hole 2a is axially provided at the front end of the connecting rod body 2. The outer wall of the front end of the connecting rod body 2 is an annular step 2b. During actual installation, a grinding wheel 3 is fitted onto the front end of the connecting rod body 2 and pressed against the bottom surface of the annular step 2b. A screw is inserted into the grinding wheel 3, with the screw shank screwed into the threaded hole 2a. The screw head is pressed against the inner wall of the grinding wheel 3 to stably connect the grinding wheel 3 and the connecting rod body 2. An external thread is provided at the rear end of the connecting rod body 2.

[0026] like Figure 2 and Figure 3 As shown, an annular connecting flange 4 is provided between the connecting rod body 2 and the main shaft 1. The connecting flange 4 and the main shaft 1 are coaxially arranged and detachably fixed together. The inner wall of the connecting flange 4 is provided with an internal thread that matches the external thread. The rear end of the connecting rod body 2 is inserted into the connecting flange 4, and the two are connected together by the engagement of the internal and external threads. Further, an annular limiting seat 2c is formed on the outer wall of the rear end of the connecting rod body 2. The limiting seat 2c is coaxially arranged with the connecting rod body 2, and the rear end face of the limiting seat 2c presses against the connecting flange 4, which plays a limiting role, so that the connecting rod body 2 can be screwed into place in one go, which is convenient for assembly.

[0027] The spindle 1 and the connecting rod body 2 are connected by a connecting flange 4, and the connecting rod body 2 is directly threaded onto the connecting flange 4. In this way, even if the threads get stuck, it is only necessary to separate the connecting flange 4 and the spindle 1. The scrapped spindle 1 can be replaced by the assembly of the scrapped connecting flange 4 and the connecting rod body 2, which effectively reduces the scrapping cost.

[0028] In this embodiment,

[0029] like Figure 2 As shown, the connection method between the connecting flange 4 and the main shaft 1 is as follows: The connecting flange 4 is pressed against the front end face of the main shaft 1. The connecting flange 4 is detachably fixed to the main shaft 1 by a ring of bolts 5, and the ring of bolts 5 is evenly distributed around the circumference of the main shaft 1, which has the advantages of stable connection and convenient assembly and disassembly. Specifically, a ring of through holes is axially penetrating the outer edge of the annular flange, and a ring of threaded holes is correspondingly provided on the main shaft 1. The number of threaded holes, through holes and bolts 5 are the same and their positions correspond one-to-one. Each through hole is fitted with a bolt 5, the head of the bolt 5 is pressed against the annular flange, and the shank of the bolt 5 is screwed into the corresponding threaded hole.

[0030] To further explain, a ring 4a, coaxial with the connecting flange 4, is formed on the rear end face of the connecting flange 4. The shape and size of the ring 4a match the inner hole of the front end of the spindle 1. The ring 4a is inserted into the inner hole of the front end of the spindle 1 and serves as a guide for the installation of the connecting flange 4, facilitating assembly and disassembly. Preferably, an interference fit is formed between the outer wall of the ring 4a and the inner wall of the front end of the spindle 1. This ensures that the connecting flange 4 and the spindle 1 are detachably fixed together even when the ring 4a is pulled out by external force, while also enhancing the coaxiality of the connection between the connecting flange 4 and the spindle 1. This ensures the rotational accuracy of the connecting rod and improves the product processing quality and precision.

[0031] In the actual product, the outer diameter of the connecting flange 4 is larger than the outer diameter of the front end of the spindle 1, so that the outer edge of the connecting flange 4 is not obstructed. In actual maintenance, the outer edge of the connecting flange 4 can be gripped by a hydraulic puller to disengage the ring 4a from the spindle 1.

[0032] like Figure 2 and Figure 3 As shown, the rear end of the aforementioned internal thread extends to the inner wall of the annular portion 4a to lengthen the internal thread and improve the connection strength between the connecting rod body 2 and the connecting flange 4. Further, an annular groove 4b is formed on the inner wall of the connecting flange 4, and the annular groove 4b is coaxially arranged with the connecting flange 4, with the front end of the aforementioned internal thread extending to the annular groove 4b. The annular groove 4b is used for tool retraction during thread cutting.

[0033] In the actual product, the connecting flange 4 is an integral structure, which effectively ensures its own strength.

[0034] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model 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 this utility model or exceeding the scope defined by the appended claims.

Claims

1. A high-speed internal grinding wheel connector, installed at the front end of a spindle (1), comprising a connector body (2) disposed on the front side of the spindle (1) and coaxial with the spindle (1), wherein the front end of the connector body (2) is provided with a threaded hole (2a) axially, and the rear end of the connector body (2) is provided with an external thread, characterized in that, A ring-shaped connecting flange (4) is provided between the connecting rod body (2) and the main shaft (1). The connecting flange (4) and the main shaft (1) are coaxially arranged and can be detachably fixed together. The inner wall of the connecting flange (4) is provided with an internal thread that matches the external thread. The rear end of the connecting rod body (2) is inserted into the connecting flange (4) and the two are connected together by the internal thread and the external thread.

2. The high-speed internal grinding wheel connector according to claim 1, characterized in that, The connecting flange (4) is pressed on the front end face of the main shaft (1). The connecting flange (4) is detachably fixed to the main shaft (1) by a ring of bolts (5), and the ring of bolts (5) is evenly distributed around the circumference of the main shaft (1).

3. The high-speed internal grinding wheel connector according to claim 2, characterized in that, A ring (4a) coaxial with the connecting flange (4) is formed on the rear end face of the connecting flange (4). The shape and size of the ring (4a) are matched with the inner hole of the front end of the spindle (1). The ring (4a) is inserted into the inner hole of the front end of the spindle (1).

4. The high-speed internal grinding wheel connector according to claim 3, characterized in that, An interference fit is formed between the outer wall of the ring (4a) and the inner wall of the front end of the main shaft (1).

5. The high-speed internal grinding wheel connector according to claim 4, characterized in that, The outer diameter of the connecting flange (4) is greater than the outer diameter of the front end of the main shaft (1).

6. The high-speed internal grinding wheel connector according to claim 1, characterized in that, A ring-shaped limiting seat (2c) is formed on the outer wall of the rear end of the connecting rod body (2), and the rear end face of the limiting seat (2c) presses against the connecting flange (4).

7. The high-speed internal grinding wheel connector according to claim 1, characterized in that, An annular groove (4b) is provided on the inner wall of the connecting flange (4). The annular groove (4b) and the connecting flange (4) are coaxially arranged, and the front end of the internal thread extends to the annular groove (4b).

8. The high-speed internal grinding wheel connector according to claim 1, characterized in that, The connecting flange (4) is an integral structure.

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