Locking device and cylindrical grinding machine

Abstract

The utility model belongs to the technical field of grinding tools, and discloses a locking device and a cylindrical grinding machine. The locking device is used for locking a pin shaft to be ground, and comprises two clamping strips and at least two locking sleeves. The two clamping strips can be spliced, the inner sides of the two clamping strips are each provided with an arc-shaped inner groove, and the two inner grooves are oppositely spliced in an opening mode so that a pin shaft can be clamped. The at least two locking sleeves can be sleeved with the two clamping strips and move in the direction close to the pin shaft, so that the two clamping strips are bent and deformed to be close to each other to be arranged on the periphery of the pin shaft in a surrounding mode till the inner sides of the two clamping strips completely wrap and clamp the periphery of the pin shaft. The locking device is good in fixing effect, high in safety performance, simple in structure and low in cost. The cylindrical grinding machine provided by the utility model comprises the first rotating main shaft, the second rotating main shaft, the first ejector pin, the second ejector pin and the locking device, when pin shaft parts with small sizes are ground by the cylindrical grinding machine, the cylindrical grinding machine can tightly fix the parts, and the parts cannot be loosened or even fall off due to external force in the grinding process; and danger is caused.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding tooling, in particular to a locking device and an external cylindrical grinder. Background Art

[0002] External cylindrical grinders are mainly used for precision grinding of end faces, outer circles and conical surfaces of shaft parts. The current main clamping method is: a pin hole is drilled in the center of each end of the shaft part, one end of the part is clamped by a clamp, the part is fixed by the fastening screws on the clamp, and then the head and tail of the part are lifted up by the center on the grinder. The paddle on the clamp is connected to the paddle on the grinder headstock to drive the workpiece to rotate to achieve external cylindrical grinding.

[0003] The conventional clamping width is at least 10mm, and the minimum fastening screw used is M6. However, in the production and manufacturing of aviation parts, many thin and short pin-type rotating parts with a clamping length of ≤10mm and an outer diameter of ≤φ5mm are encountered. Therefore, when clamping these thin and short pin-type rotating parts, they will be unstable due to size problems and cannot be precisely processed on the cylindrical grinder. In addition, the thinner the pin, the easier it is to crush the workpiece surface by clamping the clamp and locking the set screw, causing damage and affecting the processing quality of the parts.

[0004] Therefore, there is an urgent need to provide a locking device and an external cylindrical grinder to solve the above problems. Utility Model Content

[0005] According to one aspect of the utility model, the utility model provides a locking device with good fixing effect, high safety performance, simple structure and low cost.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A locking device for locking a pin to be ground, comprising:

[0008] Two clamping strips, the two clamping strips can be spliced ​​along the axis direction of the clamping strips, and the inner sides of the two clamping strips are provided with arc-shaped inner grooves, and the openings of the two inner grooves are spliced ​​relative to each other, and can clamp the pin arranged perpendicular to the axis direction of the clamping strips;

[0009] At least two locking sleeves, at least two locking sleeves can be inserted into the two clamping strips and move toward the direction close to the pin shaft, so that the two clamping strips are bent and deformed to be close to each other and arranged around the outer periphery of the pin shaft until the inner sides of the two clamping strips are completely wrapped and clamped around the outer periphery of the pin shaft.

[0010] As an optional technical solution for the locking device, the two clamping strips are spliced ​​into a bar, the locking sleeve is a nut, the outer wall of the bar is provided with threads, and the nut is screwed onto the bar through the threads.

[0011] As an optional technical solution for the locking device, the bar is a screw rod, and the two clamping bars are made by cutting the screw rod in half from the middle.

[0012] As an optional technical solution of the locking device, the inner groove is located 10 mm-20 mm away from the free end of the screw.

[0013] As an optional technical solution for the locking device, the screw is a hexagonal end screw.

[0014] As an optional technical solution of the locking device, the hexagonal end of the hexagonal end screw is not cut.

[0015] As an optional technical solution for the locking device, one end of the hexagonal end of the hexagonal end screw is bent so that the bent portion of the hexagonal end screw can be connected to the headstock lever of the grinding machine.

[0016] As an optional technical solution for the locking device, the bending angle of the hexagonal end screw is 30 degrees.

[0017] As an optional technical solution of the locking device, the number of the locking sleeves is four and they are evenly divided into two groups, which are respectively located on both sides of the inner groove.

[0018] According to another aspect of the utility model, the utility model provides an external cylindrical grinder with high safety performance.

[0019] To achieve this purpose, the utility model adopts the following technical solutions:

[0020] The external cylindrical grinding machine includes a first rotating spindle, a second rotating spindle, a first ejector and a second ejector. The first ejector and the second ejector are arranged opposite to each other and are respectively connected to the first rotating spindle and the second rotating spindle. The two ends of the pin shaft along the axis are respectively abutted against the first ejector and the second ejector. The external cylindrical grinding machine also includes the above-mentioned locking device. A headstock lever is provided on the first rotating spindle. The headstock lever is connected to the locking device, so that the first rotating spindle rotates and drives the pin shaft to rotate through the headstock lever and the locking device.

[0021] Beneficial effects of the utility model: The locking device provided by the utility model is used to lock the pin to be ground, and includes two clamping strips and at least two locking sleeves. The two clamping strips can be spliced ​​and the inner sides of the two clamping strips are provided with arc-shaped inner grooves, and the two inner groove openings are spliced ​​relative to each other to clamp the pin. The spliced ​​clamping strips and inner grooves are convenient for clamping small (small) pin-like parts. At least two locking sleeves can be inserted into the two clamping strips and move toward the direction close to the pin, so that the two clamping strips are bent and deformed to be close to each other and arranged around the outer periphery of the pin until the inner sides of the two clamping strips are completely wrapped and clamped around the outer periphery of the pin. The locking sleeve is sleeved and connected to the clamping strips, which can make the connection strength of the two clamping strips high, thereby increasing the fixation of the pin, and the wrapping fixation and the arc-shaped inner groove make the outer wall of the pin evenly stressed, thereby improving the safety performance of the locking device. The locking device can tightly wrap small pin-like parts through the elasticity of the two clamping strips and the locking of the locking sleeve, and has high fixing strength. Moreover, the locking device has a simple structure and low processing cost.

[0022] The external cylindrical grinder provided by the utility model comprises a first rotating spindle, a second rotating spindle, a first ejector pin, a second ejector pin and the above-mentioned locking device. When a relatively small pin shaft part is ground by the external cylindrical grinder, the external cylindrical grinder can firmly fix the part, and the part will not loosen or even fall due to external force during the grinding process, thus causing no danger. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0024] Figure 1 is an isometric view of the locking device provided in the embodiment of the utility model;

[0025] Figure 2 is a front view of the locking device provided in the embodiment of the utility model;

[0026] Figure 3 It is a schematic diagram of clamping the cylindrical grinder and the pin provided in the embodiment of the utility model.

[0027] In the figure:

[0028] 10. Pin; 100. Locking device; 110. Clamping strip; 120. Locking sleeve; 101. Inner groove; 200. First driving shaft; 300. First ejector pin; 400. Second ejector pin; 500. Headstock lever. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0030] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0032] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0033] This embodiment provides a locking device 100 with good fixing effect, high safety performance, simple structure and low cost.

[0034] like Figure 1 and Figure 2As shown, the locking device 100 is used to lock the pin 10 to be ground, and includes two clamping strips 110 and at least two locking sleeves 120. The two clamping strips 110 can be spliced ​​along the axial direction of the clamping strips 110 (direction A in the figure), and the inner sides of the two clamping strips 110 are provided with arc-shaped inner grooves 101, and the two inner grooves 101 are spliced ​​with openings facing each other, so as to clamp the pin 10 arranged perpendicular to the axial direction of the clamping strips 110. The spliced ​​clamping strips 110 and the inner grooves 101 are convenient for clamping small (small) pin 10 parts. At least two locking sleeves 120 can be inserted into the two clamping strips 110 and move toward the direction close to the pin 10, so that the two clamping strips 110 are bent and deformed to be close to each other and surround the outer periphery of the pin 10, until the inner sides of the two clamping strips 110 are completely wrapped and clamped to the outer periphery of the pin 10. The locking sleeve 120 is sleeved and connected to the clamping strip 110, which can make the connection strength of the two clamping strips 110 high, thereby increasing the fixation of the pin shaft 10, and the wrapping fixation and arc-shaped inner groove 101 make the outer wall of the pin shaft 10 evenly stressed, thereby improving the safety performance of the locking device 100. The locking device 100 can tightly wrap the pin shaft 10 and other parts with small volume through the elasticity of the two clamping strips 110 and the locking sleeve 120, and has high fixing strength. In addition, the locking device 100 has a simple structure and low processing cost.

[0035] In some embodiments, the locking sleeve 120 is sleeved onto the clamping strips 110 and then clamped and fixed to the two clamping strips 110 after the clamping strips 110 are moved to a position.

[0036] In this embodiment, two clamping strips 110 are spliced ​​into a bar, the locking sleeve 120 is a nut, the outer wall of the bar is provided with threads, and the nut is screwed onto the bar through the threads. The threaded connection is simple and has high connection strength.

[0037] Furthermore, in order to increase the thread consistency of the outer periphery of the two locking strips, the bar is a screw rod, and the two clamping strips 110 are made by cutting the screw rod in half from the middle. The screw rod itself has threads, and is divided into two, and the thread matching accuracy of both sides is good.

[0038] In this embodiment, the aviation type thin short pin shaft 10 type parts are suitable for hexagonal end screws. And the hexagonal end screw is a common screw with low cost.

[0039] Of course, the hexagonal end of the hexagonal end screw is not cut to increase the fixing effect of the locking device 100 .

[0040] In addition, the inner groove 101 is located 10 mm to 20 mm away from the free end of the screw rod, leaving a locking position for the locking sleeve 120. For example, it can be 10 mm, 12 mm, 14 mm, 16 mm, 18 mm, 20 mm, etc.

[0041] From the perspective of fixing effect and economy, preferably, the number of locking sleeves 120 is four and evenly divided into two groups, respectively located on both sides of the inner groove 101. In this embodiment, the number of nuts is four and evenly divided into two groups, respectively located on both sides of the inner groove 101.

[0042] Further, one end of the hexagonal end of the hexagonal end screw is bent, so that the bent portion of the hexagonal end screw can be connected to the head frame lever 500 of the grinder. The hexagonal end screw can not only clamp the fixed pin 10 but also connect with the head frame lever 500, which is a dual purpose and reduces costs.

[0043] Furthermore, in this embodiment, the bending angle of the hexagonal end screw is 30 degrees, which facilitates the connection between the hexagonal end screw and the headstock lever 500 of the grinding machine.

[0044] This embodiment also provides an external cylindrical grinder with high safety performance.

[0045] Specific as Figure 3 As shown, it includes a first rotating spindle, a second rotating spindle, a first ejector pin 300, a second ejector pin 400 and the above-mentioned locking device 100. The first ejector pin 300 and the second ejector pin 400 are arranged opposite to each other and are respectively connected to the first rotating spindle and the second rotating spindle, and the pin 10 abuts against the first ejector pin 300 and the second ejector pin 400 along the two ends of the axis. A head frame lever 500 is provided on the first rotating spindle, and the head frame lever 500 is connected to the locking device 100, so that the first rotating spindle rotates through the head frame lever 500 and the locking device 100 to drive the pin 10 to rotate. When the cylindrical grinder grinds the pin 10, which is smaller in size, the cylindrical grinder can firmly fix the parts, and the parts will not loosen or even fall due to external force during the grinding process, causing danger.

[0046] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A locking device (100) for locking a pin (10) to be ground, characterized in that: include: Two clamping strips (110), the two clamping strips (110) can be spliced ​​along the axis direction of the clamping strip (110), and the inner sides of the two clamping strips (110) are each provided with an arc-shaped inner groove (101), and the openings of the two inner grooves (101) are spliced ​​relative to each other and can clamp the pin shaft (10) arranged perpendicular to the axis direction of the clamping strip (110); At least two locking sleeves (120), at least two of the locking sleeves (120) can be inserted into the two clamping strips (110) and move toward the direction close to the pin shaft (10), so that the two clamping strips (110) are bent and deformed to be close to each other and surround the outer periphery of the pin shaft (10), until the inner sides of the two clamping strips (110) are completely wrapped and clamped to the outer periphery of the pin shaft (10).

2. The locking device (100) according to claim 1, characterized in that: The two clamping strips (110) are spliced ​​together to form a bar, the locking sleeve (120) is a nut, the outer wall of the bar is provided with threads, and the nut is screwed onto the bar through the threads.

3. The locking device (100) according to claim 2, characterized in that: The bar is a screw rod, and the two clamping bars (110) are made by cutting the screw rod in half from the middle.

4. The locking device (100) according to claim 3, characterized in that: The inner groove (101) is located 10 mm to 20 mm away from the free end of the screw.

5. The locking device (100) according to claim 3, characterized in that: The screw is a hexagonal end screw.

6. The locking device (100) according to claim 5, characterized in that: The hexagonal end of the hexagonal end screw is not cut.

7. The locking device (100) according to claim 5, characterized in that: One end of the hexagonal end of the hexagonal end screw is bent, so that the bent portion of the hexagonal end screw can be connected to a headstock lever (500) of a grinding machine.

8. The locking device (100) according to claim 7, characterized in that: The bending angle of the hexagonal end screw is 30 degrees.

9. The locking device (100) according to claim 1, characterized in that: The locking sleeves (120) are four in number and are evenly divided into two groups, respectively located on both sides of the inner groove (101).

10. An external cylindrical grinding machine, comprising a first rotating spindle, a second rotating spindle, a first ejector pin (300) and a second ejector pin (400), wherein the first ejector pin (300) and the second ejector pin (400) are arranged opposite to each other and are respectively connected to the first rotating spindle and the second rotating spindle, and the pin (10) is respectively in contact with the first ejector pin (300) and the second ejector pin (400) along the axis at two ends thereof, wherein: The external cylindrical grinding machine also includes the locking device (100) described in any one of claims 1 to 9, and a headstock lever (500) is provided on the first rotating spindle, and the headstock lever (500) is connected to the locking device (100), so that the first rotating spindle rotates through the headstock lever (500) and the locking device (100) to drive the pin shaft (10) to rotate.

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