Grinding clamping device that achieves micro-deformation by radial conical locking

Abstract

The present invention relates to a grinding clamping device that achieves micro-deformation by radial conical locking, wherein a clamping shaft and a spring are installed in a clamping sleeve, an anti-rotation section is inserted into the anti-rotation section mounting hole, a spring mounting section and a locking pin matching section are installed in the locking pin matching section mounting hole, a spring sleeve is outside the spring mounting section, a locking pin is installed in the locking pin upper section mounting hole, the locking pin matching hole and the locking pin lower section mounting hole, the locking pin upper section and the locking pin upper section mounting hole are meshed by internal and external threads, the locking pin middle section and the locking pin matching hole have the same taper, and the left side of the locking pin middle section matches the left inner wall of the locking pin matching hole, the locking pin lower section and the locking pin lower section mounting hole are clearance-matched, and the left side wall of the clamping jaw baffle abuts against the right end face of the clamping sleeve. The present invention has a simple structure and does not require an external airway pipeline or other power source; the clamping force is transmitted by a mechanical structure, and the workpiece positioning is reliable and stable, and is not affected by external air source pressure fluctuations.

Description

Technical Field

[0001] The invention relates to a clamping device, in particular to a grinding clamping device which realizes micro deformation by locking with a radial conical surface. Background Art

[0002] At present, conventional clamping devices use pneumatic diaphragm chucks, which control the axial movement of the piston shaft through an air circuit switch. When the piston shaft moves forward, it drives the clamping claws to axially tighten the workpiece to achieve rapid positioning of the workpiece; when the piston shaft moves backward, it drives the clamping claws to axially loosen and the workpiece can be removed.

[0003] Conventional clamping devices have the following drawbacks:

[0004] 1. An external gas source pipeline is required, which is troublesome.

[0005] 2. Fluctuations in air pressure may cause unreliable workpiece positioning.

[0006] 3. Complex structure and high manufacturing cost. Summary of the Invention

[0007] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a grinding clamping device which has a simple structure, stable and reliable working positioning and can achieve micro-deformation by locking with a radial conical surface.

[0008] According to the technical solution provided by the present invention, the grinding clamping device that realizes micro-deformation by radial conical surface locking includes a clamping sleeve, a clamping shaft, a spring and a locking pin;

[0009] The clamping sleeve is provided with an anti-rotation section mounting hole and a locking pin matching section mounting hole connected together from left to right, the anti-rotation section mounting hole, the locking pin matching section mounting hole and the clamping sleeve are coaxially arranged, and the clamping sleeve is provided with a locking pin upper section mounting hole and a locking pin lower section mounting hole along its diameter direction, the locking pin upper section mounting hole is an internal threaded hole, the locking pin lower section mounting hole is a cylindrical light hole, and the inner diameter of the locking pin upper section mounting hole is larger than the inner diameter of the locking pin lower section mounting hole, and an inner step is formed at the connecting portion of the anti-rotation section mounting hole and the locking pin matching section mounting hole;

[0010] The clamping shaft includes an anti-rotation section, a spring mounting section and a locking pin matching section which are coaxially connected together from left to right and whose end face sizes increase step by step. The locking pin matching sections are all cylindrical. At least three clamping jaw baffles are fixed at intervals along the circumferential direction on the outer circle of the right end portion of the locking pin matching section. An arc-shaped clamping jaw clamping strip is fixed on the right side of the clamping jaw baffle, and the center of the arc where the clamping jaw clamping strip is located is on the axis of the clamping shaft. A locking pin matching hole is opened on the locking pin matching section along its longitudinal diameter direction. The locking pin matching hole is a flat tapered hole with a large upper opening, a small lower opening and equal width in the front-to-back direction. The cross section of the locking pin matching hole is an oblong.

[0011] The locking pin comprises an upper locking pin section, a middle locking pin section and a lower locking pin section which are coaxially connected together from top to bottom. The upper locking pin section is an external thread section, the middle locking pin section is a conical section whose outer circle gradually decreases from top to bottom, and the lower locking pin section is a cylindrical section. The outer circle size of the upper locking pin section is larger than the outer circle size of the upper end of the middle locking pin section, and the outer circle size of the lower end of the middle locking pin section is larger than the outer circle size of the lower locking pin section.

[0012] The lower section of the locking pin is clearance fit with the mounting hole of the lower section of the locking pin, and the left side wall of the clamping claw baffle is against the right end face of the clamping shaft sleeve.

[0013] Preferably, the clamping jaw baffle is fan-shaped, and the center of the fan-shaped circle where the clamping jaw baffle is located is located on the axis of the clamping shaft.

[0014] Preferably, the inner circle portion of the clamping jaw baffle is in a shape with reduced thickness.

[0015] Preferably, the anti-rotation section is a column with a rectangular cross-section.

[0016] Preferably, 3 to 6 clamping jaw baffles are fixed on the outer circle of the right end portion of the locking pin fitting section at even intervals along its circumferential direction.

[0017] The present invention has a simple structure and does not require an external airway pipeline or other power source; the present invention transmits the clamping force through a mechanical structure, and the workpiece positioning is reliable and stable and is not affected by external air source pressure fluctuations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 It is a front view of the shaft clamping sleeve in the present invention.

[0020] Figure 3 It is the right side view of the shaft clamping sleeve in the present invention.

[0021] Figure 4It is a front view of the clamping shaft in the present invention.

[0022] Figure 5 It is a right side view of the clamping shaft in the present invention.

[0023] Figure 6 yes Figure 4 AA cross-sectional view.

[0024] Figure 7 yes Figure 4 B-direction view.

[0025] Figure 8 It is a front view of the clamping shaft in the present invention. Implementation Method

[0026] The present invention will be further described below with reference to specific embodiments.

[0027] The grinding clamping device of the present invention realizes micro deformation by radial conical locking, such as Figure 1 As shown, it includes a clamping sleeve 1, a clamping shaft 2, a spring 3 and a locking pin 4;

[0028] like Figure 2 and Figure 3 As shown, the shaft clamping sleeve 1 is provided with an anti-rotation section mounting hole 11 and a locking pin matching section mounting hole 12 connected together from left to right, the anti-rotation section mounting hole 11, the locking pin matching section mounting hole 12 and the shaft clamping sleeve 1 are coaxially arranged, and a locking pin upper section mounting hole 13 and a locking pin lower section mounting hole 14 are opened on the shaft clamping sleeve 1 along its diameter direction, the locking pin upper section mounting hole 13 is an internal threaded hole, the locking pin lower section mounting hole 14 is a cylindrical light hole, and the inner diameter of the locking pin upper section mounting hole 13 is larger than the inner diameter of the locking pin lower section mounting hole 14, and an inner step is formed at the connecting portion of the anti-rotation section mounting hole 11 and the locking pin matching section mounting hole 12;

[0029] like Figure 4-7 As shown, the clamping shaft 2 includes an anti-rotation section 21, a spring mounting section 22 and a locking pin matching section 23 which are coaxially connected together from left to right and whose end face dimensions are gradually increased. The anti-rotation section 21 is prismatic, and the spring mounting section 22 and the locking pin matching section 23 are both cylindrical. Six clamping jaws baffles 24 are fixed on the outer circle of the right end portion of the locking pin matching section 23 at uniform intervals along its circumferential direction, and an arc-shaped clamping jaw clamping strip 25 is fixed on the right side of the clamping jaw baffle 24. The center of the arc of the clamping jaw clamping strip 25 is located on the axis of the clamping shaft 2; a locking pin matching hole 26 is opened on the locking pin matching section 23 along its longitudinal diameter direction. The locking pin matching hole 26 is a flat tapered hole with a large upper opening, a small lower opening and equal width in the front-to-back direction, and the cross-section of the locking pin matching hole 26 is an oblong.

[0030] like Figure 8As shown, the locking pin 4 includes a locking pin upper section 41, a locking pin middle section 42 and a locking pin lower section 43 which are coaxially connected together from top to bottom. The locking pin upper section 41 is an external thread section, the locking pin middle section 42 is a conical section whose outer circle gradually decreases from top to bottom, and the locking pin lower section 43 is a cylindrical section. The outer circle size of the locking pin upper section 41 is larger than the outer circle size of the upper end of the locking pin middle section 42, and the outer circle size of the lower end of the locking pin middle section 42 is larger than the outer circle size of the locking pin lower section 43.

[0031] like Figure 1 As shown, a clamping shaft 2 and a spring 3 are installed in the clamping sleeve 1, the anti-rotation section 21 is inserted into the anti-rotation section mounting hole 11, the anti-rotation section 21 and the anti-rotation section mounting hole 11 are in a clearance fit, the spring mounting section 22 and the locking pin matching section 23 are installed in the locking pin matching section mounting hole 12, the locking pin matching section 23 and the locking pin matching section mounting hole 12 are in a clearance fit, the spring 3 is sleeved on the outside of the spring mounting section 22, the left end of the spring 3 is against the inner step of the clamping sleeve 1, and the right end of the spring 3 is against the locking pin matching section 23 The left end face of the locking pin is abutted, and a locking pin 4 is installed in the upper mounting hole 13 of the locking pin, the locking pin matching hole 26 and the lower mounting hole 14 of the locking pin. The upper section 41 of the locking pin is engaged with the upper mounting hole 13 of the locking pin through internal and external threads. The middle section 42 of the locking pin has the same taper as the locking pin matching hole 26, and the left side face of the middle section 42 of the locking pin is matched with the left inner wall of the locking pin matching hole 26. The lower section 43 of the locking pin is clearance-fitted with the lower mounting hole 14 of the locking pin, and the left side wall of the clamping jaw baffle 24 is abutted against the right end face of the clamping sleeve 1.

[0032] The clamping jaw baffle 24 is fan-shaped, and the center of the fan-shaped circle where the clamping jaw baffle 24 is located is located on the axis of the clamping shaft 2. The inner circle portion of the clamping jaw baffle 24 is in a shape with reduced thickness.

[0033] The anti-rotation section 21 is a column with a rectangular cross section, and the anti-rotation section 21 can be any other shape with a non-circular cross section.

[0034] During operation, the workpiece 5 is placed between the six clamping jaws and clamping strips 25. The locking pin 4 is tightened in the upper mounting hole 13 of the locking pin to move downward, so that the left side of the middle section 42 of the locking pin is pressed against the left inner wall of the locking pin matching hole 26, thereby driving the clamping shaft 2 to move slowly to the left and compressing the spring 3, causing the inner circle of the clamping jaw baffle 24 at the right end of the clamping shaft 2 to produce a slight deformation, so that the clamping jaw and clamping strip 25 clamp the workpiece 5, and the one-time grinding of the inner circle, outer circle and end face of the workpiece 5 can be achieved.

[0035] After grinding is completed, the locking pin 4 is released to move upward. Under the rebound force of the spring 3, the clamping shaft 2 slowly moves to the right, the clamping jaw baffle 24 gradually returns to its original position, and the clamping bar 25 holding the workpiece 5 gradually relaxes until the workpiece 5 can be removed.

Claims

1. A grinding clamping device that achieves micro-deformation by radial conical locking, characterized by: It comprises a clamping sleeve (1), a clamping shaft (2), a spring (3) and a locking pin (4); The shaft clamping sleeve (1) is provided with an anti-rotation section mounting hole (11) and a locking pin matching section mounting hole (12) connected together from left to right. The anti-rotation section mounting hole (11), the locking pin matching section mounting hole (12) and the shaft clamping sleeve (1) are coaxially arranged. An upper locking pin section mounting hole (13) and a lower locking pin section mounting hole (14) are provided on the shaft clamping sleeve (1) along its diameter direction. The upper locking pin section mounting hole (13) is an internal threaded hole, and the lower locking pin section mounting hole (14) is a cylindrical light hole. The inner diameter of the upper locking pin section mounting hole (13) is larger than the inner diameter of the lower locking pin section mounting hole (14). An inner step is formed at the connection between the anti-rotation section mounting hole (11) and the locking pin matching section mounting hole (12). The clamping shaft (2) comprises an anti-rotation section (21), a spring mounting section (22) and a locking pin fitting section (23) which are coaxially connected together from left to right and whose end face dimensions increase step by step. The locking pin fitting section (23) is cylindrical. At least three clamping jaw baffles (24) are fixed at intervals along the circumferential direction on the outer circle of the right end portion of the locking pin fitting section (23). An arc-shaped clamping jaw clamping strip (25) is fixed on the right side of the clamping jaw baffle (24). The center of the arc of the clamping jaw clamping strip (25) is located on the axis of the clamping shaft (2); a locking pin fitting hole (26) is opened on the locking pin fitting section (23) along its longitudinal diameter direction. The locking pin fitting hole (26) is a flat tapered hole with a large upper opening and a small lower opening and equal width in the front-to-back direction. The cross section of the locking pin fitting hole (26) is an oblong. The locking pin (4) comprises a locking pin upper section (41), a locking pin middle section (42) and a locking pin lower section (43) which are coaxially connected together from top to bottom, the locking pin upper section (41) is an external thread section, the locking pin middle section (42) is a conical section whose outer circle gradually decreases from top to bottom, and the locking pin lower section (43) is a cylindrical section, the outer circle size of the locking pin upper section (41) is larger than the outer circle size of the upper end of the locking pin middle section (42), and the outer circle size of the lower end of the locking pin middle section (42) is larger than the outer circle size of the locking pin lower section (43); A clamping shaft (2) and a spring (3) are installed in the clamping shaft sleeve (1), the anti-rotation section (21) is inserted into the anti-rotation section mounting hole (11), the anti-rotation section (21) and the anti-rotation section mounting hole (11) are in clearance fit, the spring mounting section (22) and the locking pin matching section (23) are installed in the locking pin matching section mounting hole (12), the locking pin matching section (23) and the locking pin matching section mounting hole (12) are in clearance fit, the spring (3) is sleeved on the outside of the spring mounting section (22), the left end of the spring (3) is against the inner step of the clamping shaft sleeve (1), and the right end of the spring (3) is against the locking pin matching section (2 3), a locking pin (4) is installed in the locking pin upper section mounting hole (13), the locking pin matching hole (26) and the locking pin lower section mounting hole (14), the locking pin upper section (41) is engaged with the locking pin upper section mounting hole (13) through internal and external threads, the locking pin middle section (42) and the locking pin matching hole (26) have the same taper, and the left side surface of the locking pin middle section (42) is matched with the left inner wall of the locking pin matching hole (26), the locking pin lower section (43) is clearance-matched with the locking pin lower section mounting hole (14), and the left side wall of the clamping jaw baffle (24) is against the right end surface of the clamping sleeve (1).

2. The grinding clamping device for achieving micro-deformation by radial conical locking according to claim 1, characterized in that: The clamping jaw baffle (24) is fan-shaped, and the center of the fan-shaped circle where the clamping jaw baffle (24) is located is located on the axis of the clamping shaft (2).

3. The grinding clamping device for achieving micro-deformation by radial conical locking as claimed in claim 2, characterized in that: The inner circle portion of the clamping jaw baffle (24) is in a shape with reduced thickness.

4. The grinding clamping device for achieving micro-deformation by radial conical locking according to claim 1, characterized in that: The anti-rotation section (21) is a column with a rectangular cross section.

5. The grinding clamping device for realizing micro-deformation by radial conical locking as claimed in claim 1, characterized in that: Three to six clamping jaw baffles (24) are fixed on the outer circle of the right end portion of the locking pin matching section (23) at even intervals along its circumferential direction.

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