Grinding clamp for connecting valve

Abstract

The grinding clamp comprises a cylindrical chuck and a rod-shaped pull rod, a vertically-through connecting cavity is formed in the hollow portion of the chuck, the pull rod is arranged on the chuck in a penetrating mode through the connecting cavity, and the bottom end of the pull rod exceeds the chuck and is configured to be a push rod connected to a main shaft; the chuck comprises a clamping part on the upper side, the clamping part is configured to be matched with the connecting valve in a sleeving mode, a plurality of openings are formed in the clamping part in the radial direction in a hollowed-out mode, the pull rod comprises an extrusion part at the top end, and the extrusion part abuts against a cavity opening of the connecting cavity; the grinding clamp has a loosening state and a clamping state which can be switched, and in the loosening state, the connecting valve is freely connected with or separated from the clamping part through a pipeline in a sleeving mode; in the clamping state, the main shaft drives the push rod through the air cylinder to drive the pull rod to move downwards, the extrusion part extrudes the cavity wall of the connecting cavity, the gap of the opening is enlarged, the clamping part elastically deforms outwards, the clamping part and the connecting valve are in interference fit, and the connecting valve and the grinding clamp are relatively fixed.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, and specifically to a grinding fixture for connecting valves. Background Technology

[0002] Grinding is an important step in machining. It is an abrasive precision machining method that uses grinding tools and abrasives to remove an extremely thin layer of metal from the surface of a workpiece, building upon finishing processes. (See attached image.) Figure 7 The portable connecting valve 3 shown is a tubular structure with a hollow section forming a pipe 301. If the connecting valve 3 is ground by traditional manual grinding, the worker needs to hold the connecting valve 3 with a clamp in one hand and press the other end of the connecting valve 3 with the other hand to prevent it from falling off the clamp, and then place it on the grinding tool for grinding.

[0003] However, the annual grinding demand for the connecting valve 3 is large, and the manual grinding method requires workers to work with both hands at the same time, which is cumbersome and labor-intensive, resulting in low grinding efficiency and high labor costs. It also leads to problems such as mismatch in production rhythm and inconvenient scheduling.

[0004] To reduce the labor intensity of workers and improve grinding efficiency, existing technology provides a disc-type automatic grinding machine. Several spindles are distributed circumferentially on the disc. Various fixtures can be installed on the spindles according to the parts to be processed, and each spindle includes a cylinder-driven push rod. The operator only needs to place the part in the fixture; the spindle, via the cylinder, automatically moves the push rod, causing the fixture to clamp the part, and then carries the part into the machine tool for grinding. This not only eliminates the fatigue problem of manual operation but also increases the work efficiency per unit time.

[0005] Therefore, how to design a grinding fixture for the aforementioned portable connecting valve 3 on a disc-type automatic grinder has become the main problem that needs to be solved. Summary of the Invention

[0006] In view of the aforementioned defects or deficiencies in the prior art, it is desirable to provide a grinding fixture for connecting valves. By radially hollowing out several openings in the clamping part, the clamping part possesses the ability to elastically deform and expand outwards. Connected by a pull rod and a push rod on a main shaft cylinder, the cylinder automatically drives the pull rod to sink, causing the pressing part to press against the cavity wall of the connecting chamber. This, in turn, causes the clamping part to expand outwards and press against the side wall of the pipe, thereby clamping the connecting valve tightly against the chuck. Not only is the structure simple, but the clamping method is also simple and convenient. Operators only need one hand to complete the operation, reducing labor intensity and significantly improving grinding efficiency, greatly reducing labor costs and increasing per capita output.

[0007] The effect of this utility model is achieved as follows:

[0008] This application provides a grinding fixture for connecting valves, including a cylindrical chuck and a rod-shaped pull rod. The hollow portion of the chuck forms a vertically penetrating connecting cavity. The pull rod passes through the connecting cavity and is inserted into the chuck. The bottom end of the pull rod extends beyond the chuck and is configured to connect to a push rod on a spindle. The chuck includes an upper clamping portion configured to engage with the connecting valve. The clamping portion has several openings that are radially hollowed out. The pull rod includes a pressing portion at the top end, which abuts against the opening of the connecting cavity.

[0009] The grinding fixture has a switchable relaxed state and a clamping state. In the relaxed state, the diameter of the clamping part does not exceed the diameter of the pipe connecting the valve, and the connecting valve can freely connect to or disconnect from the clamping part through the pipe. In the clamping state, the spindle drives the push rod through the cylinder to move the pull rod downward. The extrusion part extrudes the cavity wall of the connecting cavity, the gap of the opening expands, and the clamping part undergoes elastic deformation outward, so that the diameter of the clamping part expands to extrude the side wall of the pipe, thereby making the clamping part and the connecting valve interference fit, and the connecting valve and the grinding fixture are relatively fixed.

[0010] Furthermore, the clamping part has four openings cut out at equal intervals. The four openings are arranged in a cross shape, which not only facilitates processing but also ensures that the clamping part is divided into four parts, making it easy to generate elastic deformation.

[0011] Furthermore, the opening on the upper side of the extrusion section and / or connecting cavity has an inverted conical shape that is wider at the top and narrower at the bottom. This makes it easier for the clamping section to undergo elastic deformation outward, and the deformation process of the clamping section is more stable.

[0012] Furthermore, both the extrusion section and the upper opening of the connecting cavity have an inverted conical shape that is wider at the top and narrower at the bottom. This makes it easier for the clamping part to undergo elastic deformation outward, resulting in a more stable transmission process between the chuck and the pull rod.

[0013] Furthermore, the chuck also includes a transition section on the middle side and a support section on the lower side. The support section is configured to connect to the spindle, and the transition section is configured to connect the clamping section and the support section. The transition section has a frustum-shaped structure that is narrower at the top and wider at the bottom, and the transition section and the clamping section together are hollowed out radially to form several openings. The transition section not only connects the clamping section and the support section, but can also undergo elastic deformation together with the clamping section, thereby making it easier for the clamping section to undergo elastic deformation and making the clamping operation more stable.

[0014] Furthermore, the connecting cavity inside the transition section has a frustum-shaped structure that is narrower at the top and wider at the bottom. The width of the connecting cavity varies with the diameter of the transition section, resulting in a thinner wall thickness at the transition section, which makes the transition section more prone to elastic deformation.

[0015] Furthermore, the pull rod includes a threaded portion with external threads at the bottom, which is configured to connect threadedly to the push rod on the spindle cylinder. This not only facilitates the installation and removal of the grinding fixture but also ensures a high connection strength between the grinding fixture and the spindle.

[0016] The grinding fixture for connecting valves provided in this application features radially perforated openings in the clamping portion, enabling it to elastically deform and expand outwards. Connected to a pull rod and a push rod on the main shaft cylinder, the cylinder automatically lowers the pull rod, causing the pressing part to press against the wall of the connecting cavity. This, in turn, causes the clamping portion to expand outwards and press against the side wall of the pipe, thus clamping the connecting valve to the chuck. Therefore, the grinding fixture is designed as an ER collet type, which is not only simple in structure but also convenient in clamping. The operator only needs to place the connecting valve onto the clamping portion; the main shaft automatically drives the pull rod to lower and expand the clamping portion to clamp the connecting valve via the cylinder. This operation can be completed with just one hand, reducing workload, significantly improving grinding efficiency, greatly reducing labor costs, and increasing per capita output. Attached Figure Description

[0017] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of the connection structure when the grinding fixture clamps the connecting valve according to an embodiment of this application;

[0019] Figure 2 This is a schematic diagram of the connection structure between the connecting valve and the grinding fixture provided in an embodiment of this application;

[0020] Figure 3 This is a schematic diagram of the connection structure between the pull rod and the clamp provided in an embodiment of this application;

[0021] Figure 4 This is a schematic diagram of the internal structure of the grinding fixture provided in the embodiments of this application;

[0022] Figure 5 This is a cross-sectional structural diagram of the grinding fixture in the relaxed state provided in the embodiments of this application;

[0023] Figure 6 This is a cross-sectional structural diagram of the grinding fixture in the clamping state provided in the embodiments of this application;

[0024] Figure 7 This is a three-dimensional structural diagram of the connecting valve provided in an embodiment of this application.

[0025] The reference numerals in the attached drawings are as follows: 1-clamp, 101-connecting cavity, 102-opening, 110-clamping part, 120-transition part, 130-support part, 2-pull rod, 210-pressing part, 220-threaded part, 3-connecting valve, 301-pipe. Detailed Implementation

[0026] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0027] Please refer to the attached document. Figure 1-7 This application provides a grinding fixture for connecting valves, including a cylindrical chuck 1 and a rod-shaped pull rod 2. The hollow portion of the chuck 1 forms a vertically penetrating connecting cavity 101. The pull rod 2 passes through the connecting cavity 101 and is inserted into the chuck 1. The bottom end of the pull rod 2 extends beyond the chuck 1 and is configured to connect to a push rod on the spindle. The chuck 1 includes an upper clamping portion 110, which is configured to engage with the connecting valve 3. The clamping portion 110 has several openings 102 hollowed out radially. The pull rod 2 includes a top pressing portion 210, which abuts against the opening of the connecting cavity 101.

[0028] The grinding fixture has a switchable relaxed state and a clamping state. In the relaxed state, the diameter of the clamping part 110 does not exceed the diameter of the pipe 301 of the connecting valve 3, and the connecting valve 3 can freely engage or disengage from the clamping part 110 through the pipe 301. In the clamping state, the spindle drives the push rod through the cylinder to move the pull rod 2 downward, the extrusion part 210 extrudes the cavity wall of the connecting cavity 101, the gap of the opening 102 expands, and the clamping part 110 undergoes elastic deformation outward, so that the diameter of the clamping part 110 expands to extrude the side wall of the extrusion pipe 301, thereby making the clamping part 110 and the connecting valve 3 interference fit, and the connecting valve 3 and the grinding fixture relatively fixed.

[0029] In this embodiment, by radially hollowing out several openings 102 on the clamping part 110, the clamping part 110 has the ability to elastically deform and expand outward. It is connected to the push rod on the main shaft cylinder via the pull rod 2. The cylinder automatically drives the pull rod 2 to sink, causing the extrusion part 210 to extrude into the cavity wall of the connecting cavity 101. This causes the clamping part 110 to expand outward and extrude into the side wall of the pipe 301, thereby clamping the connecting valve 3 onto the chuck 1. Thus, the grinding fixture is designed as an ER collet type structure, which is not only simple in structure but also convenient in clamping method. The operator only needs to fit the connecting valve 3 onto the clamping part 110; the main shaft will automatically drive the pull rod 2 to sink via the cylinder, causing the clamping part 110 to expand and clamp the connecting valve 3. The operation can be completed with just one hand, reducing workload and significantly improving grinding efficiency, greatly reducing labor costs and increasing per capita output.

[0030] Please refer to the attached document. Figure 2-3In some embodiments of this application, the clamping part 110 is provided with four openings 102 at equal intervals. The four openings 102 are arranged in a cross shape, which not only makes processing convenient, requiring only line cutting of the chuck 1 along the cross direction, but also ensures that the clamping part 110 is divided into four parts, making it easy to generate elastic deformation.

[0031] Preferably, the width of the opening 102 is 0.1 mm, which not only makes the clamping part 110 easy to undergo elastic deformation, but also has little impact on the strength of the clamping part 110.

[0032] Of course, in other embodiments of this application, the number of openings 102 on the clamping part 110 can be three, five, six, etc.

[0033] Please refer to the attached document. Figure 5-6 In some embodiments of this application, the upper opening of the pressing part 210 and / or the connecting cavity 101 has an inverted conical structure that is wider at the top and narrower at the bottom. This allows the pressing part 110 to slide downwards along the slope of the inverted conical structure while being clamped, thus applying an outward pushing force to the inner wall of the connecting cavity 101. This makes it easier for the clamping part 110 to undergo elastic deformation outwards, and the deformation process of the clamping part 110 is more stable.

[0034] Please refer to the attached document. Figure 5-6 In some embodiments of this application, both the extrusion part 210 and the upper opening of the connecting cavity 101 have an inverted conical structure that is wider at the top and narrower at the bottom. This allows the inclined surfaces of the extrusion part 210 and the upper opening of the connecting cavity 101 to fit together in the clamping state, and as the extrusion part 210 sinks, the clamping part 110 is squeezed outward along the inclined surface of the connecting cavity 101, making the transmission process between the chuck 1 and the pull rod 2 more stable.

[0035] Please refer to the attached document. Figure 1-4 In some embodiments of this application, the chuck 1 further includes a transition portion 120 on the middle side and a support portion 130 on the lower side. The support portion 130 is configured to connect the main shaft, and the transition portion 120 is configured to connect the clamping portion 110 and the support portion 130. The transition portion 120 has a frustum-shaped structure that is narrow at the top and wide at the bottom, and the transition portion 120 and the clamping portion 110 together form a plurality of openings 102 along the radial direction.

[0036] In this embodiment, the transition portion 120 not only connects the clamping portion 110 and the support portion 130, but also has an opening 102 formed on the transition portion 120, so that the transition portion 120 can undergo elastic deformation together with the clamping portion 110, thereby making it easier for the clamping portion 110 to undergo elastic deformation and making the clamping operation more stable.

[0037] Please refer to the attached document. Figure 4In some embodiments of this application, the connecting cavity 101 inside the transition portion 120 has a frustum-shaped structure that is narrow at the top and wide at the bottom. The width of the connecting cavity 101 varies with the diameter of the transition portion 120, making the wall thickness of the transition portion 120 thinner, that is, the wall thickness of the chuck 1 is more uniform, thereby making the transition portion 120 more prone to elastic deformation.

[0038] Please refer to the attached document. Figure 3-4 In some embodiments of this application, the pull rod 2 includes a threaded portion 220 with external threads at the bottom, which is configured to be threadedly connected to the push rod on the spindle cylinder. Therefore, when installing the grinding fixture, the installation operation can be completed simply by aligning the pull rod on the grinding fixture with the push rod, inserting it, and tightening it. This not only makes the installation and disassembly of the grinding fixture more convenient but also ensures a higher connection strength between the grinding fixture and the spindle.

[0039] It should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used above to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means three or more.

[0040] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A grinding fixture for connecting valves, characterized in that, The device includes a cylindrical chuck (1) and a rod-shaped pull rod (2). The hollow portion of the chuck (1) forms a vertically penetrating connecting cavity (101). The pull rod (2) passes through the connecting cavity (101) and is inserted into the chuck (1). The bottom end of the pull rod (2) extends beyond the chuck (1) and is configured to connect to a push rod on the main shaft cylinder. The chuck (1) includes an upper clamping part (110), which is configured to engage with a connecting valve (3). The clamping part (110) has several openings (102) hollowed out radially. The pull rod (2) includes a top pressing part (210), which abuts against the opening of the connecting cavity (101). The grinding fixture has a switchable relaxed state and a clamping state. In the relaxed state, the diameter of the clamping part (110) does not exceed the diameter of the pipe (301) of the connecting valve (3), and the connecting valve (3) can freely engage or disengage from the clamping part (110) through the pipe (301). In the clamping state, the spindle drives the push rod through the cylinder to move the pull rod (2) downward, the extrusion part (210) extrudes the cavity wall of the connecting cavity (101), the gap of the opening (102) expands, and the clamping part (110) undergoes elastic deformation outward, so that the diameter of the clamping part (110) expands to the side wall of the extrusion pipe (301), thereby making the clamping part (110) and the connecting valve (3) interference fit, and the connecting valve (3) and the grinding fixture are relatively fixed.

2. The grinding fixture for connecting valves according to claim 1, characterized in that, The clamping part (110) has four openings (102) that are hollowed out at the same intervals.

3. The grinding fixture for connecting valves according to claim 1, characterized in that, The upper opening of the extrusion section (210) and / or the connecting cavity (101) has an inverted conical structure that is wider at the top and narrower at the bottom.

4. The grinding fixture for connecting valves according to claim 3, characterized in that, The upper opening of both the extrusion section (210) and the connecting cavity (101) has an inverted conical structure that is wider at the top and narrower at the bottom.

5. The grinding fixture for connecting valves according to claim 1, characterized in that, The chuck (1) also includes a transition portion (120) on the middle side and a support portion (130) on the lower side. The support portion (130) is configured to connect the main shaft, and the transition portion (120) is configured to connect the clamping portion (110) and the support portion (130). The transition portion (120) has a frustum-shaped structure that is narrow at the top and wide at the bottom, and the transition portion (120) and the clamping portion (110) are together hollowed out radially to form the plurality of openings (102).

6. The grinding fixture for connecting valves according to claim 5, characterized in that, The connecting cavity (101) inside the transition section (120) has a frustum-shaped structure that is narrow at the top and wide at the bottom.

7. The grinding fixture for connecting valves according to claim 1, characterized in that, The pull rod (2) includes a threaded portion (220) with external threads at the bottom, the threaded portion (220) being configured to be threadedly connected to a push rod on the main shaft cylinder.

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