Centering and clamping mechanism applied to circular metal piece

Abstract

The utility model discloses a centring and clamping mechanism applied to round metal piece, including bottom plate, clamping cylinder, wedge plate and positioning and clamping mechanism, the middle part of bottom plate is equipped with the positioning and clamping mechanism along Y axis, wedge plate nests and sets up in the positioning and clamping mechanism, one side of bottom plate is fixed with clamping cylinder, and the clamping cylinder is fixed with the clamping cylinder. The telescopic end of the clamping air cylinder is in locking connection with a wedge plate, and the bottom of the wedge plate is fixedly connected with a bottom plate through an X-axis linear guide rail. The positioning and clamping mechanism comprises two oppositely-arranged clamping plates, a positioning groove for containing the circular workpiece is formed between the clamping plates, a clamping air cylinder drives a wedge plate to move along the X axis, the wedge plate drives the two clamping plates to move oppositely, and the positioning groove clamps or loosens the circular workpiece. The centering clamping device is high in clamping force and precision, precision loss or fatigue cannot be caused after the centering clamping device is used for many times, and a round metal piece can be accurately centered and clamped.

Description

Technical Field

[0001] The utility model belongs to the field of automobile manufacturing, and in particular relates to a centering clamping mechanism used for round metal parts. Background Art

[0002] The car seat recliner is a load-bearing device installed between the backrest and the seat pan. It mainly realizes the tilt angle and folding movement of the seat backrest to adapt to the posture requirements of different human bodies. It is also a transmission structure for the force exerted by the human body on the backrest. The core pivot structure of the recliner is usually a round metal part with a built-in reset coil spring. When the core part is assembled with the upper and lower connecting plates, adjustment handles and other components of the recliner, the round core part must be clamped and fixed to ensure the fixed state of the round core part. The existing fixing method is generally to clamp the product through a chuck, but the price of the chuck is relatively expensive, and in the case of continuous work, the chuck will lose its positioning accuracy after fatigue, resulting in inaccurate positioning, loose fixation and other problems. The service life of the chuck will also be affected. Therefore, the positioning structure needs to be redesigned. Utility Model Content

[0003] In response to the above problems and technical requirements, the utility model provides a centering and clamping mechanism for circular metal parts, which has high clamping force and high precision, will not lose precision or produce fatigue after repeated use, and can accurately center and clamp circular metal parts.

[0004] The technical solution of the utility model is as follows: a centering clamping mechanism for circular metal parts, comprising a base plate, a clamping cylinder, an inclined wedge plate and a positioning clamping mechanism, a positioning clamping mechanism is provided along the Y-axis in the middle of the base plate, the inclined wedge plate is nested above the positioning clamping mechanism, a clamping cylinder is fixedly provided on one side of the base plate, the telescopic end of the clamping cylinder is locked and connected with the inclined wedge plate, and the bottom of the inclined wedge plate is fixedly connected to the base plate through an X-axis linear guide; the positioning clamping mechanism comprises two clamping plates arranged opposite to each other, a positioning groove for accommodating a circular workpiece is provided between the clamping plates, the clamping cylinder drives the inclined wedge plate to move along the X-axis, and the inclined wedge plate drives the two clamping plates to move relative to each other, so that the positioning groove clamps or releases the circular workpiece.

[0005] Furthermore, the positioning and clamping mechanism includes a Y-axis linear track, a first slide, a first clamping plate, a second slide, a second clamping plate and a guide column. The Y-axis linear track is fixedly connected to the base plate, the first slide and the second slide are slidably connected to the Y-axis linear track, the first slide is fixedly mounted with the first clamping plate, the second slide is fixedly mounted with the second clamping plate, semicircular grooves are symmetrically arranged on the first clamping plate and the second clamping plate, and when the first clamping plate and the second clamping plate are closed and clamped, the two semicircular grooves are assembled into a positioning groove for clamping the cylindrical workpiece; guide columns are also symmetrically mounted on the first clamping plate and the second clamping plate, and the guide columns are arranged on the outside of the semicircular grooves.

[0006] Furthermore, the inclined wedge plate is provided with two relatively inclined waist holes, and the two inclined waist holes are respectively correspondingly sleeved on the two guide pillars. A cavity is provided in the middle of the inclined wedge plate. The first clamping plate and the second clamping plate move relative to each other in the cavity. The inclined wedge plate slides along the X-axis, and the inclined waist holes drive the two guide pillars to approach or move away along the Y-axis. The two guide pillars drive the first clamping plate and the second clamping plate to close or open.

[0007] Furthermore, the two oblique waist holes are symmetrically arranged relative to the cavity, and the angle between the central axes of the two oblique waist holes is 4°.

[0008] Furthermore, two guide rail brackets are respectively provided on both sides of the base plate, a cylinder bracket is provided between the two guide rail brackets, the guide rail bracket and the cylinder bracket are both arranged along the X-axis, the clamping cylinder is installed on the cylinder bracket, the X-axis linear guide is installed on the guide rail bracket, and the guide rail bracket and the cylinder bracket are both protruding from the base plate and fixed.

[0009] Furthermore, a fiber optic sensor is symmetrically installed on the guide rail bracket and the cylinder bracket on the opposite side. The relatively arranged fiber optic sensors can emit sensing lasers to the positioning grooves, and the sensing lasers can sense the position of the circular workpiece.

[0010] The beneficial effects of the utility model are as follows: the utility model transmits the driving force of the clamping cylinder through the inclined wedge plate, the inclined wedge plate can amplify and balance the force of the clamping cylinder, and only one cylinder can meet the driving requirements of the two clamping plates; an angle is formed between the two inclined waist holes opened on the inclined wedge plate, and when the inclined wedge plate moves along the X-axis, the guide column is compressed by the inclined waist hole to produce a Y-axis movement, so that the circular workpiece is positioned and clamped; since the angle between the two inclined waist holes is only 4°, the displacement distance of the guide column in the Y-axis direction is very short, which can ensure that even when the two clamping plates are in a fully opened state, the workpiece can be placed and supported, and the workpiece can be safely placed in different states; the cost of this mechanism is low, it can be used for a long time without fatigue, it has high positioning accuracy, good clamping effect, good economy, and can effectively improve the qualified rate of products. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a three-dimensional structural diagram of the centering and clamping mechanism of the utility model;

[0012] Figure 2 It is a top view of the centering and clamping mechanism of the utility model;

[0013] Figure 3 This is a structural diagram of the centering clamping mechanism of the utility model without the inclined wedge plate;

[0014] Figure 4 This is a connection diagram of the bottom plate and the centering clamping mechanism in the utility model;

[0015] Figure 5It is a structural diagram of the first slide plate in the utility model;

[0016] Marked in the figure are: base plate 1, guide rail bracket 11, X-axis linear guide 111, cylinder bracket 12, clamping cylinder 2, inclined wedge plate 3, inclined waist hole 31, cavity 32, positioning clamping mechanism 4, Y-axis linear rail 41, first slide 42, first clamping plate 43, second slide 44, second clamping plate 45, guide column 46, positioning groove 47, semicircular groove 471, optical fiber sensor 5, circular workpiece 6. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0018] like Figure 1-5 The figure shows a centering clamping mechanism of the utility model applied to circular metal parts, including a base plate 1, a clamping cylinder 2, an inclined wedge plate 3 and a positioning clamping mechanism 4. The middle part of the base plate 1 is provided with a positioning clamping mechanism 4 along the Y-axis, and the inclined wedge plate 3 is nested above the positioning clamping mechanism 4. The clamping cylinder 2 is fixedly provided on one side of the base plate 1, and the telescopic end of the clamping cylinder is locked and connected with the inclined wedge plate 3. The bottom of the inclined wedge plate 3 is fixedly connected to the base plate 1 through an X-axis linear guide 111.

[0019] Two guide rail brackets 11 are respectively provided on both sides of the base plate 1, and a cylinder bracket 12 is provided between the two guide rail brackets 11. The guide rail brackets 11 and the cylinder brackets 12 are both arranged along the X-axis, the clamping cylinder 2 is mounted on the cylinder bracket 12, and the X-axis linear guide 111 is mounted on the guide rail bracket 11. The guide rail bracket 11 and the cylinder bracket 12 are both protruded from the base plate 1 and fixedly arranged. A fiber optic sensor 5 is symmetrically installed on a guide rail bracket 11 and the cylinder bracket 12 on the opposite side. The relatively arranged fiber optic sensor 5 can emit a sensing laser to the positioning groove 47, and the sensing laser can sense the position of the circular workpiece 6.

[0020] The positioning clamping mechanism 4 includes two clamping plates arranged opposite to each other, and a positioning groove 47 for accommodating a circular workpiece is provided between the clamping plates. The clamping cylinder 2 drives the inclined wedge plate 3 to move along the X-axis, and the inclined wedge plate 3 drives the two clamping plates to move relative to each other, so that the positioning groove clamps or releases the circular workpiece. Specifically, the positioning and clamping mechanism 4 includes a Y-axis linear rail 41, a first slide 42, a first clamping plate 43, a second slide 44, a second clamping plate 45 and a guide column 46. The Y-axis linear rail 41 is fixedly connected to the base plate 1, and the first slide 42 and the second slide 44 are slidably connected to the Y-axis linear rail 41. The first slide 42 is fixedly mounted with the first clamping plate 43, and the second slide 44 is fixedly mounted with the second clamping plate 45. The first clamping plate 43 and the second clamping plate 45 are symmetrically provided with semicircular grooves 471. When the first clamping plate 43 and the second clamping plate 45 are closed and clamped, the two semicircular grooves 471 are combined to form a positioning groove 47 for clamping the cylindrical workpiece 6; guide columns 46 are also symmetrically mounted on the first clamping plate 43 and the second clamping plate 45, and the guide columns 46 are arranged on the outside of the semicircular grooves 471.

[0021] The inclined wedge plate 3 is provided with two relatively inclined waist holes 31, and the two inclined waist holes 31 are respectively correspondingly sleeved on the two guide pillars 46. A cavity 32 is provided in the middle of the inclined wedge plate 3. The first clamping plate 43 and the second clamping plate 45 move relatively in the cavity 32. The inclined wedge plate 3 slides along the X-axis. The inclined waist holes 31 drive the two guide pillars 46 to approach or move away along the Y-axis. The two guide pillars 46 drive the first clamping plate 43 and the second clamping plate 45 to close or open. The two inclined waist holes 31 are symmetrically arranged relative to the cavity 32, and the angle between the central axes of the two inclined waist holes 31 is 4°. Since the angle between the two inclined waist holes 31 is only 4°, the displacement distance of the guide pillar 46 in the Y-axis direction is very short, which can ensure that even when the two clamping plates are in a fully open state, the workpiece can be placed and supported, and the workpiece can be securely placed in different states.

[0022] The action process of the utility model is as follows: the clamping cylinder 2 drives the inclined wedge plate 3 to move, and moves the oblique outward end of the oblique waist hole 31 to correspond to the guide column 46. At this time, the first clamping plate 43 and the second clamping plate 45 are opened, and the gap between the two semicircular grooves 471 is the largest. The circular workpiece 6 is placed between the two semicircular grooves 471. After the optical fiber sensor 5 senses that the workpiece in the groove is in place, the clamping cylinder 2 drives the inclined wedge plate 3 to move in the opposite direction, and the relatively arranged oblique waist hole 31 moves toward each other against the two guide columns 46. The two guide columns 46 drive the first slide plate 42 and the second slide plate 44 to move toward each other until the first clamping plate 43 and the second clamping plate 45 clamp the circular workpiece 6. The clamping cylinder 2 stops, and the circular workpiece 6 is clamped and positioned, and subsequent processing operations can be performed. After the operation is completed, the inclined wedge plate 3 drives the two guide columns 46 to move in the opposite direction again, and the first clamping plate 43 and the second clamping plate 45 release the circular workpiece 6, and the circular workpiece 6 can be taken out.

[0023] The above are only several preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes and substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A centering clamping mechanism for round metal parts, characterized in that: It includes a base plate, a clamping cylinder, an inclined wedge plate and a positioning clamping mechanism. The middle part of the base plate is provided with a positioning clamping mechanism along the Y axis. The inclined wedge plate is nested above the positioning clamping mechanism. A clamping cylinder is fixedly provided on one side of the base plate. The telescopic end of the clamping cylinder is locked and connected with the inclined wedge plate. The bottom of the inclined wedge plate is fixedly connected with the base plate through an X-axis linear guide. The positioning clamping mechanism includes two clamping plates arranged opposite to each other. A positioning groove for accommodating a circular workpiece is provided between the clamping plates. The clamping cylinder drives the inclined wedge plate to move along the X axis, and the inclined wedge plate drives the two clamping plates to move relative to each other, so that the positioning groove clamps or releases the circular workpiece.

2. The centering clamping mechanism for circular metal parts according to claim 1, characterized in that: The positioning and clamping mechanism includes a Y-axis linear track, a first slide, a first clamping plate, a second slide, a second clamping plate and a guide column. The Y-axis linear track is fixedly connected to the base plate, the first slide and the second slide are slidably connected to the Y-axis linear track, the first slide is fixedly mounted with the first clamping plate, the second slide is fixedly mounted with the second clamping plate, semicircular grooves are symmetrically arranged on the first clamping plate and the second clamping plate, and when the first clamping plate and the second clamping plate are closed and clamped, the two semicircular grooves are assembled into a positioning groove for clamping the cylindrical workpiece; guide columns are also symmetrically mounted on the first clamping plate and the second clamping plate, and the guide columns are arranged on the outside of the semicircular grooves.

3. The centering clamping mechanism for circular metal parts according to claim 2, characterized in that: The inclined wedge plate is provided with two relatively inclined waist holes, which are respectively correspondingly sleeved on the two guide pillars. A cavity is provided in the middle of the inclined wedge plate. The first clamping plate and the second clamping plate move relatively in the cavity. The inclined wedge plate slides along the X-axis. The inclined waist holes drive the two guide pillars to move closer or farther along the Y-axis. The two guide pillars drive the first clamping plate and the second clamping plate to close or open.

4. The centering clamping mechanism for circular metal parts according to claim 3, characterized in that: The two oblique waist holes are symmetrically arranged relative to the cavity, and the angle between the central axes of the two oblique waist holes is 4°.

5. The centering clamping mechanism for circular metal parts according to claim 4, characterized in that: Two guide rail brackets are respectively provided on both sides of the base plate, a cylinder bracket is provided between the two guide rail brackets, the guide rail brackets and the cylinder brackets are both arranged along the X-axis, the clamping cylinder is installed on the cylinder bracket, the X-axis linear guide is installed on the guide rail bracket, and the guide rail bracket and the cylinder bracket are both protruding from the base plate and fixedly arranged.

6. The centering clamping mechanism for circular metal parts according to claim 5, characterized in that: An optical fiber sensor is symmetrically installed on the guide rail bracket and the cylinder bracket on the opposite side. The optical fiber sensors arranged opposite to each other can emit induction lasers to the positioning grooves, and the induction lasers can sense the position of the circular workpiece.

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