Cylindrical sleeve inner hole grinding flexible connection structure

Abstract

Provided is a flexible connection structure for grinding the inner hole of a cylindrical sleeve, belonging to the field of mechanical processing technology. It includes a flexible joint, a connecting plate, a jacket, an intermediate joint, an inner lever, an outer lever, and a workpiece connecting plate; the flexible joint is installed in the middle hole of the connecting plate and is used to cooperate with the inner hole of the main shaft, the right side of the connecting plate is coaxially fixedly connected with the jacket, the inner cavity of the jacket is installed with an intermediate joint, the left end face of the intermediate joint is connected with an inner lever and an outer lever on both sides, the connecting plate is connected to the inner lever and the outer lever through a toggle structure, the right end of the intermediate joint is elastically connected to the inner wall of the jacket, the center of the left end of the intermediate joint is contacted and connected with the right end face of the flexible joint through a steel ball, the right side of the intermediate joint passes through the center hole of the right end of the jacket and is coaxially connected to the workpiece connecting plate, and the right end of the workpiece connecting plate is coaxially connected to the workpiece. The utility model improves the connection structure with the workpiece on the grinding machine so that the connection structure has flexibility, so that the processed workpiece meets the requirements.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical processing, and in particular relates to a cylindrical sleeve inner hole grinding flexible connection structure. Background Art

[0002] When grinding the inner hole of a cylindrical slender sleeve on a universal cylindrical grinder (the inner hole of a cylindrical sleeve has strict requirements on roundness, cylindricity, end face runout and verticality), the outer circle of the sleeve is usually used as the reference for positioning, and the headstock is connected to the user's workpiece during grinding to obtain rotational power. To ensure machining accuracy, the connection must meet the following requirements: 1. The machine headstock and the user's workpiece cannot be rigidly connected, and the joint must have the function of self-aligning with the rotation of the user's workpiece. 2. The user's workpiece should rotate smoothly and should not have large axial movement. Current technology uses thrust-locking joints in combination with V-type clamps to solve this grinding difficulty problem, but it still cannot well guarantee the machining requirements of the workpiece. Therefore, it is necessary to propose improvements. Utility Model Content

[0003] The technical problem solved by the utility model is to provide a flexible connection structure for grinding the inner hole of a cylindrical sleeve. The utility model aims to improve the connection structure between the grinding machine and the workpiece to make the connection structure flexible so that the processed workpiece meets the requirements.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A cylindrical sleeve inner hole grinding flexible connection structure includes a flexible joint, a connection plate, a jacket, an intermediate joint, an inner lever, an outer lever, and a workpiece connection plate;

[0006] The flexible joint is installed in the middle hole of the connecting disk and is used to cooperate with the inner hole of the main shaft. The right side of the connecting disk is coaxially fixedly connected with the outer sleeve. The inner cavity of the outer sleeve is installed with an intermediate joint. The left end face of the intermediate joint is connected with an inner lever and an outer lever on both sides. The connecting disk is connected to the inner lever and the outer lever through a toggle structure. The right end of the intermediate joint is elastically connected to the inner wall of the outer sleeve. The center of the left end of the intermediate joint is in contact with the right end face of the flexible joint through a steel ball. The right side of the intermediate joint passes through the center hole of the right end of the outer sleeve and is coaxially connected to the workpiece connecting disk. The right end of the workpiece connecting disk is coaxially connected to the workpiece.

[0007] To further define the above scheme, the inner lever and the outer lever are respectively fixed on both sides of the left end surface of the middle joint through a small shaft, a small shaft through hole 1 is provided in the middle of the inner lever for the small shaft to pass through, and a small shaft through hole 2 is provided in the middle of the outer lever for the small shaft to pass through, and the small shaft and the middle joint are screwed together through a threaded structure.

[0008] To further define the above scheme, a semicircular ring is provided at one end of the inner lever close to the center of the middle joint, and a groove is provided at one end of the outer lever close to the center of the middle joint, the semicircular ring of the inner lever is sleeved in the groove of the outer lever, and the semicircular ring and groove structure at the connection between the inner lever and the outer lever provide space for the contact between the steel ball and the flexible joint; a U-shaped groove for mounting a pull pin is provided at one end of the inner lever away from the center of the middle joint, and a cylindrical pull pin is fixed on one side of the right end of the connecting disk, and one end of the cylindrical pull pin is adapted to the U-shaped groove for mounting a pull pin on the inner lever; a U-shaped groove for mounting a pull pin is provided at one end of the outer lever away from the center of the middle joint, and a cylindrical pull pin is also fixed on the other side of the right end of the connecting disk, and one end of the cylindrical pull pin is adapted to the U-shaped groove for mounting a pull pin on the outer lever.

[0009] To further limit the above scheme, a steel ball limiting groove is provided at the center of the left end of the intermediate joint, the steel ball is installed in the steel ball limiting groove, and a cemented carbide block is welded to the right end face of the flexible joint, and the steel ball is in contact with the surface of the cemented carbide block.

[0010] As a further limitation of the above scheme, a spring mounting hole is provided at the right end of the middle joint, a spring is provided in the spring mounting hole, and the right end of the spring presses against the inner wall of the outer sleeve.

[0011] To further define the above scheme, a sleeve hole is provided in the right end portion of the intermediate joint passing through the outer sleeve, the left end of the workpiece connecting plate is sleeved in the sleeve hole and fastened by a fastening screw, and a fastening screw hole for fastening the fastening screw is provided on the outer wall of the sleeve hole of the intermediate joint.

[0012] As a further limitation of the above solution, the connection plate is fixedly connected to the outer sleeve via a connection screw; and the workpiece connection plate is coaxially connected to the workpiece via a workpiece connection screw.

[0013] The advantages of this utility model compared with the prior art:

[0014] 1. When this solution is working, the machine tool dial drives the intermediate joint, the workpiece connection plate, and the user's workpiece to produce non-concentric errors during the rotation process. At this time, the steel ball and the intermediate joint will make irregular circular motions on the carbide surface, and the inner lever and the outer lever will float to transmit power. At the same time, the rotation error of the machine tool will not be superimposed on the user's workpiece, ensuring the roundness, cylindricity and end face verticality of the user's workpiece;

[0015] 2. When this solution is working, the user's workpiece on the V-shaped fixture is not axially positioned, and axial movement will occur during the grinding process. At this time, the spring force between the connecting plate and the outer sleeve presses the middle joint and the steel ball to the carbide surface welded on the front end of the flexible joint, eliminating the axial movement of the workpiece connecting plate and the user's workpiece, and ensuring the end face runout requirements of the inner hole of the user's workpiece;

[0016] 3. The workpiece connecting plate in this solution can be replaced with different specifications. By replacing workpiece connecting plates of different sizes to grind the inner holes of cylindrical sleeves of different sizes, the structure can be widely used. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 For this utility model Figure 1 AA direction schematic diagram in;

[0019] Figure 3 It is a schematic diagram of the structure of the flexible joint in the utility model;

[0020] Figure 4 It is a structural schematic diagram of the intermediate joint in the utility model;

[0021] Figure 5 It is a three-dimensional structural schematic diagram of the middle joint in the utility model;

[0022] Figure 6 This is a schematic diagram of the structure of the inner lever in the utility model;

[0023] Figure 7 It is a schematic diagram of the structure of the Chinese and foreign levers of the utility model;

[0024] Figure 8 It is a schematic diagram of the three-dimensional cutaway structure of the utility model. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0027] See also Figure 1-8 , describe the embodiments of the present utility model in detail.

[0028] Example: Grinding flexible connection structure of cylindrical sleeve inner hole, see Figure 1 , Figure 8 As shown, it includes a flexible joint 1, a connecting plate 2, a sleeve 4, an intermediate joint 5, an inner lever 6, an outer lever 7, and a workpiece connecting plate 13;

[0029] The flexible joint 1 is installed in the middle hole of the connecting disk 2 and is used to cooperate with the inner hole of the main shaft. The right side of the connecting disk 2 is coaxially fixedly connected with the outer sleeve 4. The inner cavity of the outer sleeve 4 is installed with an intermediate joint 5. The left end surface of the intermediate joint 5 is connected with an inner lever 6 and an outer lever 7 on both sides. The connecting disk 2 is connected to the inner lever 6 and the outer lever 7 through a toggle structure. The right end of the intermediate joint 5 is elastically connected to the inner wall of the outer sleeve 4. The center of the left end of the intermediate joint 5 is in contact with the right end surface of the flexible joint 1 through a steel ball 14. The right side of the intermediate joint 5 passes through the center hole of the right end of the outer sleeve 4 and is coaxially connected to the workpiece connecting disk 13. The right end of the workpiece connecting disk 13 is coaxially connected to the workpiece.

[0030] Through this embodiment: the connecting disk 2 is connected to the machine tool dial by bolts, the rotation of the machine tool dial drives the connecting disk 2 to rotate, the connecting disk 2 drives the inner lever 6 and the outer lever 7 through the cylindrical pin, transmits power to the middle joint 5 and the workpiece connecting disk 13, and drives the user's workpiece to rotate.

[0031] In a specific embodiment, referring to FIG. Figure 1 , Figure 6 , Figure 7 As shown, the inner lever 6 and the outer lever 7 are respectively fixed on both sides of the left end surface of the middle joint 5 through a small shaft 8. The middle part of the inner lever 6 is provided with a small shaft through hole 1 6-3 for the small shaft 8 to pass through, and the middle part of the outer lever 7 is provided with a small shaft through hole 2 7-2 for the small shaft 8 to pass through. The small shaft 8 and the middle joint 5 are screwed together through a threaded structure.

[0032] Through this embodiment, the inner lever 6 and the outer lever 7 are connected to the middle joint 5, and the inner lever 6 and the outer lever 7 drive the middle joint 5 to rotate.

[0033] In a specific embodiment, see Figure 1 , Figure 2 , Figure 6 , Figure 7As shown, a semicircular ring 6-1 is provided at one end of the inner lever 6 close to the center of the middle joint 5, and a groove 7-1 is provided at one end of the outer lever 7 close to the center of the middle joint 5. The semicircular ring 6-1 of the inner lever 6 is sleeved in the groove 7-1 of the outer lever 7. The semicircular ring 6-1 and the groove 7-1 structure at the connection between the inner lever 6 and the outer lever 7 provide space for the contact between the steel ball 14 and the flexible joint 1; a U-shaped groove 6-2 for mounting a detent pin is provided at one end of the inner lever 6 away from the center of the middle joint 5, and a cylindrical detent pin 9 is fixed on one side of the right end of the connecting disk 2, and one end of the cylindrical detent pin 9 is adapted to the U-shaped groove 6-2 for mounting a detent pin on the inner lever 6; a U-shaped groove 7-3 for mounting a detent pin is provided at one end of the outer lever 7 away from the center of the middle joint 5, and a cylindrical detent pin 9 is also fixed on the other side of the right end of the connecting disk 2, and one end of the cylindrical detent pin 9 is adapted to the U-shaped groove 7-3 for mounting a detent pin on the outer lever 7.

[0034] Through this embodiment, the connection method between the lever and the detent pin can ensure that the inner and outer levers can float and transmit power.

[0035] In a specific embodiment, see Figure 1 , Figure 3 , Figure 4 , Figure 5 As shown, a steel ball limiting groove 5-1 is provided at the center of the left end of the intermediate joint 5, and the steel ball 14 is installed in the steel ball limiting groove 5-1. A hard alloy block 1-1 is welded to the right end surface of the flexible joint 1, and the steel ball 14 contacts the surface of the hard alloy block 1-1. Preferably, the diameter of the steel ball 14 is φ10 mm.

[0036] Through the above implementation, a flexible connection structure is formed between the flexible joint 1 and the workpiece.

[0037] In a specific embodiment, see Figure 1 , Figure 4 , Figure 5 As shown, a spring mounting hole 5 - 2 is provided at the right end of the middle joint 5 , a spring 11 is provided in the spring mounting hole 5 - 2 , and the right end of the spring 11 presses against the inner wall of the outer sleeve 4 .

[0038] Through the above implementation, an elastic connection structure is formed between the middle joint and the outer sleeve.

[0039] In a specific embodiment, a sleeve hole 5-3 is provided in the right end portion of the intermediate joint 5 that passes through the outer sleeve 4, the left end of the workpiece connecting plate 13 is sleeved in the sleeve hole 5-3 and fastened by a fastening screw 12, and a fastening screw hole 5-4 for screwing the fastening screw 12 is provided on the outer wall of the sleeve hole 5-3 of the intermediate joint 5.

[0040] In a specific embodiment, the connection plate 2 is fixedly connected to the outer sleeve 4 via a connection screw 3 ; and the workpiece connection plate 13 is coaxially connected to the workpiece via a workpiece connection screw 10 .

[0041] The workpiece connecting plate 13 can be replaced with different specifications. By replacing workpiece connecting plates of different sizes to grind the inner holes of cylindrical sleeves of different sizes, the structure can be widely used.

[0042] The use principle of this utility model:

[0043] The machine tool dial drives the connecting disk 2 to rotate, and the connecting disk 2 drives the inner lever 6 and the outer lever 7 through the cylindrical pin 9. The inner lever 6 and the outer lever 7 drive the intermediate joint 5, the workpiece connecting disk 13, and the user's workpiece to rotate. The user's workpiece will produce eccentricity errors during the rotation process. At this time, the steel ball 14 and the intermediate joint 5 will make irregular circular motions on the surface of the cemented carbide 1-1. The inner lever 6 and the outer lever 7 float to transmit power, and at the same time, the rotation error of the machine tool will not be superimposed on the user's workpiece, thereby ensuring the roundness, cylindricity and end face verticality of the user's workpiece.

[0044] The user workpiece on the V-type fixture has no axial positioning, which will cause axial movement during the grinding process. The spring force between the connecting plate 2 and the outer sleeve 4 presses the intermediate joint 5 and the steel ball 14 to be close to the carbide surface welded on the front end of the flexible joint 1. The axial movement of the workpiece connecting plate 13 and the user workpiece is eliminated, ensuring the end face runout requirements of the inner hole of the user workpiece.

[0045] The mechanism of the utility model has been verified by batch application on products, has a good effect, and can well overcome the problems existing in workpiece processing.

[0046] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0047] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. Cylindrical sleeve inner hole grinding flexible connection structure, characterized by: It comprises a flexible joint (1), a connecting plate (2), an outer sleeve (4), an intermediate joint (5), an inner lever (6), an outer lever (7), and a workpiece connecting plate (13); The flexible joint (1) is installed in the middle hole of the connecting disk (2) and is used to cooperate with the inner hole of the main shaft. The right side of the connecting disk (2) is coaxially fixedly connected with the outer sleeve (4). The inner cavity of the outer sleeve (4) is installed with an intermediate joint (5). The left end surface of the intermediate joint (5) is connected with an inner lever (6) and an outer lever (7) on both sides. The connecting disk (2) is connected to the inner lever (6) and the outer lever (7) through a toggle structure. The right end of the intermediate joint (5) is elastically connected to the inner wall of the outer sleeve (4). The center of the left end of the intermediate joint (5) is contacted and connected with the right end surface of the flexible joint (1) through a steel ball (14). The right side of the intermediate joint (5) passes through the center hole of the right end of the outer sleeve (4) and is coaxially connected to the workpiece connecting disk (13). The right end of the workpiece connecting disk (13) is coaxially connected to the workpiece.

2. The cylindrical sleeve inner hole grinding flexible connection structure according to claim 1, characterized in that: The inner lever (6) and the outer lever (7) are respectively fixed to the two sides of the left end surface of the middle joint (5) through a small shaft (8); a small shaft through hole (6-3) for the small shaft (8) to pass through is provided in the middle of the inner lever (6); a small shaft through hole (7-2) for the small shaft (8) to pass through is provided in the middle of the outer lever (7); the small shaft (8) and the middle joint (5) are screwed together through a threaded structure.

3. The cylindrical sleeve inner hole grinding flexible connection structure according to claim 1, characterized in that: The inner lever (6) is provided with a semicircular ring (6-1) at one end close to the center of the middle joint (5), and the outer lever (7) is provided with a groove (7-1) at one end close to the center of the middle joint (5). The semicircular ring (6-1) of the inner lever (6) is inserted into the groove (7-1) of the outer lever (7). The semicircular ring (6-1) and the groove (7-1) structure at the connection between the inner lever (6) and the outer lever (7) provide space for the steel ball (14) to contact with the flexible joint (1); the inner lever (6) is far away from the center of the middle joint (5). A first U-shaped groove (6-2) for mounting a detent pin is provided at one end, and a cylindrical detent pin (9) is fixed on one side of the right end of the connecting plate (2), and one end of the cylindrical detent pin (9) is adapted to the first U-shaped groove (6-2) for mounting a detent pin on the inner lever (6); a second U-shaped groove (7-3) for mounting a detent pin is provided at one end of the outer lever (7) away from the center of the middle joint (5), and a cylindrical detent pin (9) is also fixed on the other side of the right end of the connecting plate (2), and one end of the cylindrical detent pin (9) is adapted to the second U-shaped groove (7-3) for mounting a detent pin on the outer lever (7).

4. The cylindrical sleeve inner hole grinding flexible connection structure according to claim 1, characterized in that: A steel ball limiting groove (5-1) is provided at the center of the left end of the intermediate joint (5), the steel ball (14) is installed in the steel ball limiting groove (5-1), and a hard alloy block (1-1) is welded to the right end surface of the flexible joint (1), and the steel ball (14) is in contact with the surface of the hard alloy block (1-1).

5. The cylindrical sleeve inner hole grinding flexible connection structure according to claim 1, characterized in that: A spring mounting hole (5-2) is provided at the right end of the middle joint (5), a spring (11) is provided in the spring mounting hole (5-2), and the right end of the spring (11) is pressed against the inner wall of the outer sleeve (4).

6. The cylindrical sleeve inner hole grinding flexible connection structure according to claim 1, characterized in that: A sleeve hole (5-3) is provided in the right end portion of the intermediate joint (5) passing through the outer sleeve (4); the left end of the workpiece connecting plate (13) is sleeved in the sleeve hole (5-3) and fastened by a fastening screw (12); and a fastening screw hole (5-4) for screwing the fastening screw (12) is provided on the outer wall of the sleeve hole (5-3) of the intermediate joint (5).

7. The cylindrical sleeve inner hole grinding flexible connection structure according to claim 1, characterized in that: The connection plate (2) is fixedly connected to the outer sleeve (4) via a connection screw (3); and the workpiece connection plate (13) is coaxially connected to the workpiece via a workpiece connection screw (10).

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