A simple rotary pressing mechanism

Abstract

A simple rotary pressing mechanism includes a support base, a pressing body, and a locking body; the support base is a stepped structure composed of a bottom, a cylindrical rod, and a threaded rod; the pressing body is sleeved outside the cylindrical rod, and a pin is arranged radially at the lower part of the cylindrical rod; the pressing body is a cylindrical barrel, there is a pressing arm outside the barrel wall of the pressing body, a pressing head is installed on the pressing arm, a positioning groove is arranged on the upper end surface of the pressing body, a relief hole extending upward from the barrel opening is opened at the lower end inside the barrel wall of the pressing body, a spring is sleeved on the cylindrical rod, the upper end of the spring abuts against the end of the relief hole, and the lower end of the spring abuts against the pin; a rotary pressing limit port is arranged at the lower end of the barrel wall of the pressing body, the pin is placed in the relief hole, and the end of the pin extends into the rotary pressing limit port; the locking body located above the pressing body is threadedly connected outside the threaded rod, the locking body is cylindrical, a pin hole is arranged along the axial direction on the barrel wall of the locking body, and a telescopic pin for locking the locking body and the pressing body is installed at the pin hole. The structure of the present invention is simple, easy to manufacture, and has low application requirements.

Description

Technical Field

[0001] The present invention relates to a rotary pressing mechanism. Background Art

[0002] When generally clamping parts, a pressing plate is needed for pressing. During the loading and unloading process, if the pressing plate cannot rotate out of the way, it will bring inconvenience to the clamping, the operation steps are cumbersome, and tooling is required to expand the clamping space. For this reason, a fixture is needed that can automatically rotate to the pressing position for pressing during clamping, and automatically rotate to one side to vacate the lifting space of the part when the clamping is released. Currently, existing similar fixtures include pneumatic corner bars, hydraulic corner cylinders and rotary quick clamps. Among them, pneumatic and hydraulic corner cylinders are expensive and require corresponding pneumatic and hydraulic auxiliary tools to cooperate, and the tooling design circuit is complex. Moreover, the upper screwing rod of the rotary quick clamp rotates at a small angle, resulting in limited upper and lower pressing strokes, and there are significant differences in the pressing effects for products with irregular blanks and large size differences. Summary of the Invention

[0003] The present invention is a simple rotary pressing mechanism provided to overcome the above problems existing in the prior art. It has a simple structure, is easy to manufacture, and has low application requirements.

[0004] The technical solution of the present invention is: it includes a support seat, a pressing body, and a locking body; the support seat is a stepped structure composed of a bottom, a cylindrical rod, and a threaded rod connected in sequence from bottom to top; the pressing body is sleeved outside the cylindrical rod, and a pin is arranged radially at the lower part of the cylindrical rod; the pressing body is a cylindrical barrel, there is a pressing arm outside the barrel wall of the pressing body, a pressing head is installed on the pressing arm, a positioning groove is provided on the upper end surface of the pressing body, a relief hole extending upward from the barrel opening is opened at the lower end inside the barrel wall of the pressing body, a spring is sleeved on the corresponding cylindrical rod at the position of the relief hole, the upper end of the spring abuts against the end of the relief hole, and the lower end of the spring abuts against the pin; a swivel limit port for limiting the swivel stroke of the pressing body is provided at the lower end of the barrel wall of the pressing body, the pin is placed in the relief hole, and the end of the pin extends into the swivel limit port; the locking body located above the pressing body is threadedly connected outside the threaded rod, the locking body is cylindrical, a pin hole is provided along the axial direction on the barrel wall of the locking body, a telescopic pin for locking the locking body and the pressing body is installed at the pin hole, and when the locking body rotates along the threaded rod until the end of the telescopic pin enters the positioning groove, the locking body and the pressing body are locked as a whole.

[0005] The pin penetrates into a small through hole on the rod body of the middle cylindrical rod of the support seat; the distance from the axis of the small through hole to the upper end surface of the bottom is greater than the depth of the swivel limit port at the lower end of the pressing body, and the length L1 from the axis of the small through hole to the upper end surface of the cylindrical rod is less than the length L2 from the bottom of the swivel limit port at the lower end of the pressing body to the upper end surface of the pressing body.

[0006] The spinning limit port is fan-shaped, and the central angle a1 of the fan-shaped spinning limit port is 90°; there are four positioning grooves, which are arranged radially along the pressing body, and the included angle a2 between two adjacent positioning grooves is 90°. The spinning limit port is located directly below one of the included angles a2 between two adjacent positioning grooves.

[0007] The positioning groove is a V-shaped groove composed of two symmetrically arranged inclined planes, and the ends of the two inclined planes intersect.

[0008] There is an oblong hole in the middle of the pressing arm.

[0009] The pressing head is installed at the oblong hole through more than one nut.

[0010] There is more than one rotating handle outside the locking body.

[0011] The expansion pin includes a taper pin, a small spring sleeved on the taper pin, and a plug for blocking the expansion pin is installed at the top of the pin hole; the pin hole includes a cylindrical hole and a conical hole located at the bottom of the cylindrical hole; the length of the end of the taper pin extending out of the conical hole is not greater than the depth of the positioning groove on the upper end surface of the pressing body.

[0012] Two mounting holes are provided at the bottom of the support seat.

[0013] The length of the threaded rod is greater than the thickness of the locking body; there is a through hole in the middle of the pressing body, the relief hole is concentric with the through hole, and the diameter of the relief hole is greater than the outer diameter of the spring; the length of the pin is greater than the outer diameter of the spring, and the length of the pin is less than the outer diameter of the pressing body.

[0014] In the present invention, the pressing body is driven to rotate automatically by the taper pin embedded in the V-shaped groove; the rotation angle of the pressing body is controlled by the spinning limit port and the small cylindrical pin; the locking of the locking body is not affected after the rotation angle of the pressing body is controlled by the expansion and contraction of the small spring and the taper pin; the lifting stroke of the pressing body is greatly increased by the compression and rebound of the spring. Compared with pneumatic and hydraulic rotary cylinders, the structure of the present invention is simple and the price is cheap. Compared with rotary quick clamps, the pressing part can also rotate 90° automatically, but the up and down stroke of the pressing part is increased. Description of the Drawings

[0015] Figure 1 It is the main structure main view of the present invention;

[0016] Figure 2 It is the use state diagram of the present invention;

[0017] Figure 3 It is the overall view of the main structure in the pressing state of the present invention;

[0018] Figure 4 It is the overall view of the main structure in the loosening state of the present invention;

[0019] Figure 5It is an assembly schematic diagram of the pressing body and the pin;

[0020] Figure 6 It is Figure 5 the upward view;

[0021] Figure 7 It is Figure 5 the top view;

[0022] Figure 8 It is a structural schematic diagram of the support base;

[0023] Figure 9 It is the top view of the locking body;

[0024] Figure 10 It is one of the working principle explanatory diagrams of the present invention;

[0025] Figure 11 It is the working principle explanation of the present invention Figure 2 ;

[0026] Among them, 1 is the support base (1 piece); 2 is the small cylindrical pin (1 piece); 3 is the spring (1 piece); 4 is the pressing body (1 piece); 5 is the taper pin (1 piece); 6 is the small spring (1 piece); 7 is the plug (1 piece); 8 is the locking body (1 piece); 9 is the nut (1 piece); 10 is the pressure head (1 piece), 11 is the part schematic diagram, and 12 is the fixture base plate schematic diagram. Specific implementation manner

[0027] Figure 1-9 In the specific implementation manner, the present invention includes a support base 1, a pressing body 4, a spring 3, a locking body 8, a small cylindrical pin (referred to as the pin) 2, a taper pin 5, a small spring 6, a plug 7, a screw pressure head 10, and a nut 9.

[0028] The support base 1 is divided into three parts: upper, middle, and lower. The bottom is an elliptical block structure with two through holes at both ends for locking to the fixture base plate 12 through screws; the middle section of the support base 1 is a cylindrical rod, the outer circle of the cylindrical rod is ground brightly, and it has a clearance fit with the center hole of the pressing body for up and down sliding. A small through hole perpendicular to the long direction of the bottom elliptical block is drilled at the lower part of the cylindrical rod, and the small cylindrical pin 2 is installed at the small through hole. The distance from the axis of the small through hole to the upper end face of the elliptical block structure is greater than the depth of the L-shaped limit port at the lower end of the pressing body 4 to prevent the problem that the pressing body presses against the parts on the elliptical block before pressing. After the small cylindrical pin is inserted into the small through hole, the downward stroke of the pressing body 4 can be restricted; the upper part of the support base is a cylindrical external thread structure, and the locking body 8 is installed outside the cylindrical external thread structure, and the length of the cylindrical external thread structure is greater than the thickness of the locking body 8.

[0029] The pressing body 4 is of a cylindrical structure. There is a suspended closed elliptical ring on the outside of the pressing body 4 for assembling the screw press head 10 and two nuts 9, and the pressing position and height can be freely adjusted according to the pressing position of the part. In the middle of the cylindrical structure is a smooth through hole, which is in clearance fit with the cylindrical rod in the middle of the support seat to ensure that the pressing body can slide freely after passing through the support seat. At the lower end of the cylinder is a relieving hole with a certain depth concentric with the through hole. The diameter of the relieving hole is slightly larger than the outer diameter of the spring, and the depth of the relieving hole is greater than the sum of the natural length of the spring and the diameter of the small cylindrical pin. Its function is to ensure that the small cylindrical pin can be within the spinning limit port. If the depth is too small, the small cylindrical pin may protrude outside and fail to play a blocking role. Radially at the lower end of the cylinder is an L-shaped spinning limit port. The area a1 of the spinning limit port is 1 / 4 of the cross-sectional area of the cylinder plus 1 / 2 of the diameter of the small cylindrical pin on each side, so that the movement angle of the small cylindrical pin in the groove is exactly 90°. The depth of the spinning limit port is the same as that of the relieving hole. The position of the spinning limit port is the area from the center of the closed elliptical ring to 90° clockwise when viewed from the bottom. On the upper end face of the cylindrical structure, there are 4 V-shaped grooves in the cross direction. The included angle a2 between adjacent two V-shaped grooves is 90°. The depth of the V-shaped grooves is about 2 mm and is used to cooperate with the taper pin to drive the pressing body 4 to rotate. The V-shaped grooves cooperate with the taper pin 5. When rotating, the taper pin 5 can catch the V-shaped grooves to drive the pressing body 4 to rotate. When the pressing body 4 is blocked, the taper pin 5 can be pushed inward by the V-shaped grooves. The length L1 from the axis of the small through hole to the upper end face of the middle cylindrical rod of the support seat 1 is less than the length L2 from the bottom of the spinning limit port at the lower end of the pressing body to the upper end face of the pressing body 4. When the locking body 8 is tightened, it will not be unable to continue to push the pressing body 4 downward because it abuts against the upper end face of the support seat cylindrical rod, resulting in the downward stroke of the pressing body 4 being blocked and the part 11 not being pressed.

[0030] The locking body 8 is a cylinder in the middle and columns protruding on the left and right sides. The small columns protruding on the left and right sides are the screwing rods when locking; there is a threaded through hole in the middle of the locking body 8, and its size matches the external thread on the upper part of the support seat 1. On the upper end face of the locking body 8, there is a small hole symmetrically above and below along the center line of the bottom circle of the cylinder. The bottom of the small hole is a conical hole with a vertex angle of 90° and is not completely drilled through. When the taper pin 5 is placed, a part of the taper can be exposed, and the exposed length is not greater than the depth of the V-shaped groove on the upper end face of the pressing body 4.

[0031] The outer diameter of the spring 3 is smaller than the diameter of the relieving hole at the lower part of the pressing body 4, and the inner diameter is larger than the diameter of the middle cylindrical rod of the support seat. The natural length of the spring 3 plus the diameter of the small cylindrical pin is slightly less than the depth of the relieving hole at the lower end of the pressing body 4.

[0032] The length of the small cylindrical pin 2 is greater than the outer diameter of the spring 3 and smaller than the outer diameter of the cylindrical structure of the pressing body 4.

[0033] The taper of the taper pin 5 is the same as the angle of the V-shaped groove on the upper end face of the pressing body 4, and the length of the taper part exposed from the locking body is approximately equal to the depth of the V-shaped groove.

[0034] The compression stroke of the small spring 6 is greater than the length of the cone pin 5 exposed from the locking body. The function is that when the cone pin is pushed by the V-shaped groove of the compression body to slide into the hole, the surface of the locking body 8 can be completely not exposed.

[0035] The support seat 1 is fixed on the tooling base plate 12 by two screws inserted into the through holes at both ends. The small cylindrical pin 2 is inserted into the small through hole on the cylindrical rod body in the middle of the support seat, and both ends are protruding; the spring 3 and the clamping body 4 are successively inserted into the cylindrical rod body in the middle of the support seat, and the lower part of the spring 3 is against the outer circumference of the small cylindrical pin 2, and the upper part is against the bottom surface of the clearance hole at the lower part of the clamping body 4; the exposed length of the small cylindrical pin 2 is adjusted in the rotary limit opening of the clamping body, so that one end of the small cylindrical pin 2 can block the left and right rotation of the rotary limit opening, and the other end supports the spring while not against the inner wall of the clearance hole of the clamping body 4 to affect the rotation. The screw press head 10 and the nut 9 are inserted from bottom to top in the elliptical circle suspended by the clamping body 4, and the upper part is locked with the nut 9.

[0036] The cone pin 5, small spring 6 and plug 7 are successively placed in the two small through holes at the upper end of the locking body 8. After installation, the cone pin 5 is exposed from the lower end face of the locking body 8, and the exposed length is slightly less than the depth of the V-shaped groove on the upper end face of the pressing body 4. When the cone pin is pressed by hand, the cone pin can be freely retracted into the hole until the end face is not exposed, and then the plug 7 is fixed with glue or welding. The plug 7 blocks the top opening of the small through hole. The middle threaded hole of the locking body 8 assembled with the cone pin 5, plug 7 and small spring 6 is inserted into the screw part on the upper part of the support seat 1 and tightened.

[0037] When clamping, rotate the locking body 8 forward. When the cone pin 5 is rotated to align with the V-groove of the clamping body 4, the cone pin 5 is pushed out of the end surface by the small spring 6 and embedded in the V-groove on the clamping body 4, driving the clamping body 4 to rotate together, and driving the clamping body 4 to rotate 90° to the clamping position. At this time, the end wall of the rotation limit opening at the bottom of the clamping body 4 is blocked by the small cylindrical pin 2 on the support seat 1. Continue to rotate the locking body 8, the cone pin on the locking body 8 will be pushed upward and retracted into the hole by one side of the V-groove, and rotate until the workpiece 11 is pressed by the screw press 10 on the clamping body 4, and the locking body 8 fits with the clamping body 4. When the locking body 8 cannot rotate, it is clamped.

[0038] When loosening, rotate the locking body 8 in the opposite direction. When it is rotated until the cone pin 5 is aligned with the V-groove of the clamping body 4, the cone pin 5 is pushed out of the end surface by the small spring 6 and embedded in the V-groove on the clamping body 4, driving the clamping body 4 to rotate together until the other end wall of the spin-pressed limit opening at the lower part of the clamping body 4 is blocked by the small cylindrical pin 2 on the support seat 1. At this time, the clamping body 4 is in the loosened position.

[0039] The pressing stroke of the pressing body 4 is related to the compression stroke of the spring 3 between the support seat 1 and the pressing body 4, and can meet the pressing requirements within a certain height range. By adjusting the screw head 10 and the nut 9 at the overhanging end of the pressing body 4, the position near the pressing surface of the part can be quickly adjusted, and the required pressing stroke can be reduced.

[0040] At the same time, the spring 3 between the support seat 1 and the pressing body 4 pushes the pressing body 4 to move upward. In this state, the up and down movement stroke of the pressing body 4 is related and not affected by the locking body 8, and the up and down stroke can reach 2 to 3 pitches or even longer.

[0041] Figure 10 In it, the length L1 from the axis of the small through hole to the upper end surface of the middle cylindrical rod of the support seat 1 is less than the length L2 from the bottom of the spinning limit port at the lower end of the pressing body to the upper end surface of the pressing body 4. When the outer cylindrical surface of the small cylindrical pin 2 contacts the bottom of the spinning limit port, the distance between the locking body 8 and the upper end surface of the pressing body 4 is a. At this time, by rotating the locking body 8, the pressing of the part 11 can be completed.

[0042] Figure 11 In it, the length L1 from the axis of the small through hole to the upper end surface of the middle cylindrical rod of the support seat 1 is greater than the length L2 from the bottom of the spinning limit port at the lower end of the pressing body to the upper end surface of the pressing body 4. When the locking body 8 fits with the upper end surface of the middle cylindrical rod of the support seat 1, the distance between the axis of the small through hole and the bottom of the spinning limit port at the lower end of the pressing body is b. The locking body 8 is blocked by the upper end surface of the middle cylindrical rod of the support seat 1 and cannot continue to push the pressing body 4 downward to move, resulting in the problem that the part 11 is not pressed.

Claims

1. A simple rotary pressing mechanism, characterized in that: It includes a support base (1), a pressing body (4), and a locking body (8); the support base (1) is a stepped structure composed of a bottom, a cylindrical rod, and a threaded rod connected in sequence from bottom to top; the pressing body (4) is sleeved outside the cylindrical rod, and a pin (2) is arranged radially at the lower part of the cylindrical rod; The pressing body (4) is a cylindrical barrel, there is a pressing arm outside the barrel wall of the pressing body (4), a pressing head (10) is installed on the pressing arm, a positioning groove is provided on the upper end surface of the pressing body (4), a relief hole extending upward from the barrel opening is opened at the lower end inside the barrel wall of the pressing body (4), a spring (3) is sleeved on the cylindrical rod corresponding to the relief hole, the upper end of the spring (3) abuts against the end of the relief hole, and the lower end of the spring (3) abuts against the pin (2); a rotary limit port for limiting the rotary pressing stroke of the pressing body (4) is provided at the lower end of the barrel wall of the pressing body (4), the pin (2) is placed in the relief hole, and the end of the pin (2) extends into the rotary limit port; The locking body (8) located above the pressing body (4) is threadedly connected outside the threaded rod, the locking body (8) is cylindrical, a pin hole is provided along the axial direction on the barrel wall of the locking body (8), a telescopic pin for locking the locking body (8) and the pressing body (4) is installed at the pin hole, and when the locking body (8) rotates along the threaded rod until the end of the telescopic pin enters the positioning groove, the locking body (8) and the pressing body (4) are locked as a whole; The pin (2) penetrates into a small through hole on the rod body of the middle cylindrical rod of the support base; the distance from the axis of the small through hole to the upper end surface of the bottom is greater than the depth of the rotary limit port at the lower end of the pressing body (4), and the length L1 from the axis of the small through hole to the upper end surface of the cylindrical rod is less than the length L2 from the bottom of the rotary limit port at the lower end of the pressing body to the upper end surface of the pressing body (4); The length of the threaded rod is greater than the thickness of the locking body (8); there is a through hole in the middle of the pressing body (4), the relief hole is concentric with the through hole, and the diameter of the relief hole is greater than the outer diameter of the spring (3); the length of the pin (2) is greater than the outer diameter of the spring (3), and the length of the pin (2) is less than the outer diameter of the pressing body (4).

2. The simple rotary pressing mechanism according to claim 1, characterized in that: The rotary limit port is fan-shaped, and the central angle a1 of the fan-shaped rotary limit port is 90°; there are four positioning grooves, the four positioning grooves are arranged radially along the pressing body (4), the included angle a2 between two adjacent positioning grooves is 90°, and the rotary limit port is located directly below one of the included angles a2 between two adjacent positioning grooves.

3. The simple rotary pressing mechanism according to claim 2, characterized in that: The positioning groove is a V-shaped groove composed of two symmetrically arranged inclined surfaces, and the ends of the two inclined surfaces intersect.

4. The simple rotary pressing mechanism according to claim 3, characterized in that: There is an oblong hole in the middle of the pressing arm.

5. The simple rotary pressing mechanism according to claim 4, characterized in that: The pressing head (10) is installed at the oblong hole through more than one nut (9).

6. The simple rotary pressing mechanism according to claim 1, characterized in that: There is more than one rotary handle outside the locking body (8).

7. The simple rotary pressing mechanism according to claim 1, characterized in that: The telescopic pin includes a taper pin (5) and a small spring (6) sleeved on the taper pin (5), and a plug (7) for blocking the telescopic pin is installed at the top of the pin hole; the pin hole includes a cylindrical hole and a frustum-shaped hole located at the bottom of the cylindrical hole; the length of the end of the taper pin (5) extending out of the frustum-shaped hole is not greater than the depth of the positioning groove on the upper end surface of the pressing body (4).

8. The simple rotary pressing mechanism according to claim 1, characterized in that: Two mounting holes are provided at the bottom of the support seat (1).

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