A fixture for an external cylindrical grinder

Abstract

The utility model relates to the technical field of fixture, concretely relates to a cylindrical grinding machine clamp, including fixed block, the one end of fixed block is equipped with first mobile groove, one side of first mobile groove is equipped with a plurality of second mobile grooves, one side of second mobile groove is equipped with third mobile groove, one side of third mobile groove is equipped with a plurality of fourth mobile grooves, the sliding connection of fourth mobile groove is connected with the limiting rod, one end of limiting rod is rotatably connected with first connecting rod and second connecting rod, one end of first connecting rod is rotatably connected with fixed clamp, and fixed clamp is connected in the sliding mode in second mobile groove, and first connecting rod and second connecting rod are arranged in third mobile groove, and one end of second connecting rod is rotatably connected with rotating shaft. Compared with the prior art, the present application makes the center of the workpiece and the center of the first mobile groove be located on the same horizontal line, and then makes the center of the workpiece after being fixed and the center of the center pin be located on the same horizontal line, and then guarantees the machining accuracy of the workpiece.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, and in particular to a fixture for an external cylindrical grinding machine. Background Technology

[0002] External cylindrical grinding machine fixtures are key devices to ensure accurate workpiece positioning and efficient grinding. Common fixture types include pneumatic diaphragm chucks, floating chucks, self-tightening spring collets (chicken collets), and special fixtures. The selection of fixtures should take into account the characteristics of the workpiece, accuracy requirements, and efficiency requirements. Selection recommendations should refer to the actual workpiece size, material, and accuracy requirements, and match them with the rigidity and accuracy data of the fixture.

[0003] In the prior art, Chinese Patent No. CN209551474U discloses an automatic fixture for a cylindrical grinding machine. This fixture uses a combination of a fixed clamp and a movable clamp. The fixed clamp provides a stable foundation and has clamping holes for clamping the workpiece. An elastic reset device provides clamping force to the movable clamp, controlling the movement of the clamping part to clamp the workpiece inserted into the clamping hole, thus achieving automated workpiece clamping. This allows for convenient and quick workpiece loading and unloading, enabling automated operation. However, in practical applications, the grinding machine and ejector pin of the cylindrical grinding machine mostly move horizontally to ensure the ejector pin is in contact with and fixed to the center of the workpiece. Using the aforementioned fixture with a fixed clamp and movable clamp to fix the workpiece causes a deviation between the relative position of the workpiece's center and the ejector pin's center, resulting in reduced machining accuracy during external cylindrical machining and consequently affecting the accuracy of subsequent machining. Therefore, we disclose a fixture for a cylindrical grinding machine. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a cylindrical grinding machine fixture to solve the problem that the relative position of the workpiece center and the center of the ejector pin is deviated, thereby affecting the subsequent machining accuracy of the workpiece.

[0005] To achieve the above objectives, this utility model provides a cylindrical grinding machine fixture, including a fixed block. One end of the fixed block has a first movable groove. A plurality of second movable grooves are formed on one side of the first movable groove. A third movable groove is formed on one side of the second movable groove. A plurality of fourth movable grooves are formed on one side of the third movable groove. A limit rod is slidably connected within each of the fourth movable grooves. One end of the limit rod is rotatably connected to a first connecting rod and a second connecting rod. One end of the first connecting rod is rotatably connected to a fixed fixture, which is slidably connected within the second movable grooves. The first connecting rod and the second connecting rod are disposed within the third movable grooves. One end of the second connecting rod is rotatably connected to a rotating shaft, which rotates with the fixed block. The rotating shaft extends through the outside of the fixed block and is fixedly connected to a gear. A fixed rod is fixedly connected to the outer wall of the fixed block. A third connecting block is slidably connected to the middle of the fixed rod. A first connecting block is fixedly connected to the lower end of the third connecting block. A first locking block is fixedly connected to the lower end of the first connecting block. The first locking block slidably engages with the gear. A spring is fixedly connected to one end of the fixed rod. One end of the spring is fixedly connected to the third connecting block. A turntable is fixedly connected to the end of the rotating shaft that extends through the outside of the fixed block. A limit ring is fixedly connected to the outer wall of the fixed block. A support frame is rotatably connected to the outside of the limit ring. The fixed block is located in the middle of the support frame. The support frame is connected to an external cylindrical grinding machine.

[0006] Preferably, a screw is slidably connected to the middle of the first connecting block, a second connecting block is slidably connected to one end of the screw, a second locking block is fixedly connected to the lower end of the second connecting block, the second locking block is slidably engaged with the gear, a screw sleeve is threaded to one end of the screw, the screw sleeve is located on one side of the second connecting block, and the screw is a T-shaped rod.

[0007] Preferably, the width of the second block is slightly smaller than the pitch of the gear, and the width of the first block is less than half the pitch of the gear.

[0008] Preferably, there are three of each of the second moving slot, the fixing clamp, and the fourth moving slot, which are equidistantly distributed in a ring around the fixing block.

[0009] Preferably, the fourth moving groove is an arc-shaped groove, and the center of the fourth moving groove is below the center of the rotating shaft.

[0010] Preferably, the second moving groove is a rectangular groove, the fixing clamp is a rectangular block, the fixing clamp is slidably connected in the second moving groove, and the inner side of the fixing clamp is provided with an arc-shaped groove.

[0011] Preferably, the fixing rod includes a polygonal rod and a circular plate, the polygonal rod and the circular plate are fixedly connected to form a T-shaped rod, the polygonal rod is fixedly connected to the fixing block, and the outer wall of the threaded sleeve is fixedly connected with several anti-slip ridges.

[0012] The beneficial effects of this utility model are as follows: By connecting the first moving groove, the second moving groove, the third moving groove, and the fourth moving groove, the fourth moving groove restricts the sliding position of the limiting rod. When clamping the workpiece, the workpiece is placed in the middle of the fixed fixture in the first moving groove. Then, the rotating shaft is rotated to drive the second connecting rod to move in the third moving groove, so that the second connecting rod drives the limiting rod to slide in the fourth moving groove. This causes the limiting rod to drive the first connecting rod to move in the third moving groove. At the same time, the first connecting rod drives the fixed fixture to move in the second moving groove towards the center of the first moving groove to clamp the workpiece. This fixes the position of the workpiece and makes the center of the workpiece and the center of the first moving groove on the same horizontal line. This ensures that the center of the fixed workpiece and the center of the ejector pin are on the same horizontal line, thereby guaranteeing the machining accuracy of the workpiece.

[0013] This allows workers to fix the position of the fixing block by connecting the support frame to the external cylindrical grinding machine, which facilitates the fixing of the fixing block. At the same time, the support frame restricts the position of the fixing block through the limit ring, so that the fixing block can rotate during the workpiece processing, which facilitates the processing and use of the workpiece. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of an embodiment of the present utility model;

[0016] Figure 2 This is a partially cutaway three-dimensional structural diagram of the fixing block of this utility model;

[0017] Figure 3 This utility model Figure 2 A magnified structural diagram at point A;

[0018] Figure 4 This is a three-dimensional structural diagram of the connection between the gear, the first locking block, and the second locking block of this utility model.

[0019] The diagram is marked as follows:

[0020] 1. Fixed block; 2. First moving groove; 3. Second moving groove; 4. Third moving groove; 5. Fourth moving groove; 6. Limiting rod; 7. First connecting rod; 8. Fixing clamp; 9. Second connecting rod; 10. Rotating shaft; 11. Gear; 12. First locking block; 13. Second locking block; 14. First connecting block; 15. Second connecting block; 16. Screw; 17. Screw sleeve; 18. Third connecting block; 19. Fixed rod; 20. Spring; 21. Support frame; 22. Limiting ring. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0022] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0023] like Figures 1-4As shown, a cylindrical grinding machine fixture includes a fixed block 1. A first moving groove 2 is formed at one end of the fixed block 1. Several second moving grooves 3 are formed on one side of the first moving groove 2. A third moving groove 4 is formed on one side of the second moving grooves 3. Several fourth moving grooves 5 are formed on one side of the third moving grooves 4. A limit rod 6 is slidably connected within each of the fourth moving grooves 5. A first connecting rod 7 and a second connecting rod 9 are rotatably connected to one end of the limit rod 6. A fixed fixture 8 is rotatably connected to one end of the first connecting rod 7. The fixed fixture 8 is slidably connected within the second moving grooves 3. The first connecting rod 7 and the second connecting rod 9 are disposed within the third moving grooves 4. A rotating shaft 10 is rotatably connected to one end of the second connecting rod 9. The rotating shaft 10 is rotatably connected to the fixed block 1 and extends through the fixed block 1. A gear 11 is fixedly connected to one end of the fixed block 1. A fixed rod 19 is fixedly connected to the outer wall of the fixed block 1. A third connecting block 18 is slidably connected to the middle of the fixed rod 19. A first connecting block 14 is fixedly connected to the lower end of the third connecting block 18. A first locking block 12 is fixedly connected to the lower end of the first connecting block 14. The first locking block 12 is slidably engaged with the gear 11. A spring 20 is fixedly connected to one end of the fixed rod 19. One end of the spring 20 is fixedly connected to the third connecting block 18. A screw 16 is slidably connected to the middle of the first connecting block 14. A second connecting block 15 is slidably connected to one end of the screw 16. A second locking block 13 is fixedly connected to the lower end of the second connecting block 15. The second locking block 13 is slidably engaged with the gear 11. A threaded sleeve 17 is threadedly connected to one end of the screw 16. 17 is located on one side of the second connecting block 15. The screw 16 is a T-shaped rod. The width of the second locking block 13 is slightly smaller than the tooth pitch of the gear 11. The width of the first locking block 12 is less than half the tooth pitch of the gear 11. There are three second moving slots 3, three fixing clamps 8, and three fourth moving slots 5. The second moving slots 3, three fixing clamps 8, and three fourth moving slots 5 are distributed equidistantly around the fixing block 1 in a ring. The fourth moving slot 5 is an arc-shaped slot, and the center of the fourth moving slot 5 is below the center of the rotating shaft 10. The second moving slot 3 is a rectangular slot. The fixing clamp 8 is a rectangular block. The fixing clamp 8 is slidably connected in the second moving slot 3. An arc-shaped slot is opened on the inner side of the fixing clamp 8. The fixing rod 19 includes a polygonal rod and a circular plate. The polygonal rod and the circular plate are fixedly connected to form a T-shaped rod. Fixedly connected to the fixing block 1, the outer wall of the threaded sleeve 17 is fixedly connected with several anti-slip ridges. In use, a first moving groove 2 is opened at one end of the fixing block 1, several second moving grooves 3 are opened on one side of the first moving groove 2, a third moving groove 4 is opened on one side of the second moving groove 3, and several fourth moving grooves 5 are opened on one side of the third moving groove 4, so that the first moving groove 2, the second moving groove 3, the third moving groove 4 and the fourth moving groove 5 are connected. A limit rod 6 is slidably connected in the fourth moving groove 5, so that the fourth moving groove 5 restricts the sliding position of the limit rod 6. A first connecting rod 7 and a second connecting rod 9 are rotatably connected to one end of the limit rod 6, and a fixing clamp 8 is rotatably connected to one end of the first connecting rod 7. The fixing clamp 8 is slidably connected in the second moving groove 3.The first connecting rod 7 and the second connecting rod 9 are disposed within the third moving groove 4. One end of the second connecting rod 9 is rotatably connected to a rotating shaft 10. When clamping the workpiece, the workpiece is placed in the middle of the fixed fixture 8 within the first moving groove 2. Then, rotating the rotating shaft 10 drives the second connecting rod 9 to move within the third moving groove 4, causing the second connecting rod 9 to slide the limiting rod 6 within the fourth moving groove 5. This causes the limiting rod 6 to move the first connecting rod 7 within the third moving groove 4. Simultaneously, the first connecting rod 7 drives the fixed fixture 8 to move within the second moving groove 3 towards the center of the first moving groove 2 to clamp the workpiece. This fixes the position of the workpiece, ensuring that the center of the workpiece and the center of the first moving groove 2 are on the same horizontal line. Consequently, the center of the fixed workpiece and the ejector pin are aligned. The centers of the circles are located on the same horizontal line, thus ensuring the machining accuracy of the workpiece. A rotating shaft 10 is rotatably connected to a fixed block 1, which restricts the rotational position of the rotating shaft 10. A gear 11 is fixedly connected to one end of the rotating shaft 10 extending to the outside of the fixed block 1, allowing the rotating shaft 10 to drive the gear 11 to rotate. A fixed rod 19 is fixedly connected to the outer wall of the fixed block 1. A third connecting block 18 is slidably connected to the middle of the fixed rod 19. A first connecting block 14 is fixedly connected to the lower end of the third connecting block 18. A first locking block 12 is fixedly connected to the lower end of the first connecting block 14, and the first locking block 12 slidably engages with the gear 11. A spring 20 is fixedly connected to one end of the fixed rod 19, and one end of the spring 20 is fixedly connected to the third connecting block 18, allowing... The fixing block 1 fixes the position of the fixing rod 19, thereby restricting the movement of the third connecting block 18. The movement direction of the third connecting block 18 is perpendicular to the rotation direction of the gear 11. The fixing rod 19, through the spring 20, restricts the movement of the third connecting block 18, which in turn restricts the movement of the first connecting block 14 and the first locking block 12. This stabilizes the position of the first locking block 12 after it engages with the gear 11, preventing the gear 11 from rotating after it stops. This ensures that the fixing fixture 8 stably fixes the position of the workpiece. A screw 16 is slidably connected to the middle of the first connecting block 14, and a second connecting block 15 is slidably connected to one end of the screw 16. A second locking block 13 is fixedly connected to the lower end of the second connecting block 15. The second locking block 13 slidably engages with the gear 11. One end of the screw 16 is threadedly connected to a threaded sleeve 17, which is located on one side of the second connecting block 15. The screw 16 is a T-shaped rod, which restricts the movement of the second connecting block 15 by the screw 16. This restricts the position of the second locking block 13 after engagement with the gear 11 by the threaded sleeve 17, further fixing the position of the gear 11 after rotation and enhancing its positional stability. Since the width of the second locking block 13 is slightly smaller than the tooth pitch of the gear 11, and the width of the first locking block 12 is less than half the tooth pitch of the gear 11, the first locking block 12 can engage with the gear 11 at multiple angles. This allows the second connecting block 15 to adjust its position according to the position of the gear 11.This ensures that the second connecting block 15 engages with the gear 11, limiting the position of the gear 11 after rotation. This allows the fixed clamp 8 to hold workpieces of multiple diameters, improving its practicality. The second moving groove 3, the fixed clamp 8, and the fourth moving groove 5 are all three in number, equidistantly distributed in a ring around the fixed block 1. This ensures good workpiece fixation by the fixed clamp 8. The fourth moving groove 5 is an arc-shaped groove, with its center below the center of the rotating shaft 10. This allows the limiting rod 6 to move along the fourth moving groove 5, driving the fixed clamp 8 to move. The second moving groove 3 is a rectangular... The fixing clamp 8 is a rectangular block that slides within the second moving groove 3. An arc-shaped groove is provided on the inner side of the fixing clamp 8, which improves the limiting effect of the second moving groove 3 on the fixing clamp 8 and enhances the fit between the fixing clamp 8 and the workpiece. A fixing rod 19, consisting of a polygonal rod and a circular plate, is fixedly connected to form a T-shaped rod. This polygonal rod is fixedly connected to the fixing block 1, allowing the fixing rod 19 to restrict the movement direction of the third connecting block 18 and effectively limit the movement of the spring 20. Several anti-slip ridges are fixedly connected to the outer wall of the threaded sleeve 17, facilitating its rotation.

[0024] As a preferred embodiment of this example, Figure 1 and Figure 2 As shown, a turntable is fixedly connected to one end of the rotating shaft 10 that extends through the outside of the fixed block 1. A limit ring 22 is fixedly connected to the outer wall of the fixed block 1. A support frame 21 is rotatably connected to the outside of the limit ring 22. The fixed block 1 is located in the middle of the support frame 21. The support frame 21 is connected to the external cylindrical grinding machine, so that the operator can fix the position of the fixed block 1 by connecting the support frame 21 to the external cylindrical grinding machine, which facilitates the fixing of the fixed block 1. At the same time, the support frame 21 restricts the position of the fixed block 1 through the limit ring 22, so that the fixed block 1 can rotate during the processing of the workpiece, which facilitates the processing and use of the workpiece.

[0025] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0026] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A fixture for an external cylindrical grinding machine, comprising a fixing block (1), characterized in that, One end of the fixed block (1) is provided with a first moving groove (2), a plurality of second moving grooves (3) are provided on one side of the first moving groove (2), a third moving groove (4) is provided on one side of the second moving groove (3), and a plurality of fourth moving grooves (5) are provided on one side of the third moving groove (4). A limit rod (6) is slidably connected in the fourth moving groove (5). One end of the limit rod (6) is rotatably connected to a first connecting rod (7) and a second connecting rod (9). One end of the first connecting rod (7) is rotatably connected to a fixing clamp (8). The fixing clamp (8) is slidably connected in the second moving groove (3). The first connecting rod (7) and the second connecting rod (9) are provided in the third moving groove (4). One end of the second connecting rod (9) is rotatably connected to a rotating shaft (10). The rotating shaft (10) is rotatably connected to the fixed block (1). The rotating shaft (10) extends through to the outside of the fixed block (1). A gear (11) is fixedly connected to the end of the fixed block (1). A fixed rod (19) is fixedly connected to the outer wall of the fixed block (1). A third connecting block (18) is slidably connected to the middle of the fixed rod (19). A first connecting block (14) is fixedly connected to the lower end of the third connecting block (18). A first locking block (12) is fixedly connected to the lower end of the first connecting block (14). The first locking block (12) is slidably locked with the gear (11). A spring (20) is fixedly connected to one end of the fixed rod (19). One end of the spring (20) is fixedly connected to the third connecting block (18). A turntable is fixedly connected to one end of the rotating shaft (10) that passes through the outside of the fixed block (1). A limit ring (22) is fixedly connected to the outer wall of the fixed block (1). A support frame (21) is rotatably connected to the outside of the limit ring (22). The fixed block (1) is located in the middle of the support frame (21). The support frame (21) is connected to the external cylindrical grinding machine.

2. The external cylindrical grinding machine fixture according to claim 1, characterized in that, A screw (16) is slidably connected to the middle of the first connecting block (14). A second connecting block (15) is slidably connected to one end of the screw (16). A second locking block (13) is fixedly connected to the lower end of the second connecting block (15). The second locking block (13) is slidably engaged with the gear (11). A screw sleeve (17) is threadedly connected to one end of the screw (16). The screw sleeve (17) is located on one side of the second connecting block (15). The screw (16) is a T-shaped rod.

3. The external cylindrical grinding machine fixture according to claim 2, characterized in that, The width of the second block (13) is slightly smaller than the pitch of the gear (11), and the width of the first block (12) is less than half the pitch of the gear (11).

4. The external cylindrical grinding machine fixture according to claim 1, characterized in that, There are three of each of the second moving slot (3), the fixed clamp (8) and the fourth moving slot (5), and the second moving slot (3), the fixed clamp (8) and the fourth moving slot (5) are distributed equidistantly in a ring around the fixed block (1).

5. The external cylindrical grinding machine fixture according to claim 1, characterized in that, The fourth moving groove (5) is an arc-shaped groove, and the center of the fourth moving groove (5) is below the center of the rotating shaft (10).

6. The external cylindrical grinding machine fixture according to claim 1, characterized in that, The second moving groove (3) is a rectangular groove, the fixing clamp (8) is a rectangular block, the fixing clamp (8) is slidably connected in the second moving groove (3), and the inner side of the fixing clamp (8) is provided with an arc groove.

7. The external cylindrical grinding machine fixture according to claim 2, characterized in that, The fixing rod (19) includes a polygonal rod and a circular plate. The polygonal rod and the circular plate are fixedly connected to form a T-shaped rod. The polygonal rod is fixedly connected to the fixing block (1). The outer wall of the screw sleeve (17) is fixedly connected with several anti-slip ridges.

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