Floating pressing clamp

Abstract

The floating pressing clamp comprises an adapter flange, the top of the adapter flange is evenly provided with a plurality of hollow adapter pins in the circumferential direction, the tops of the hollow adapter pins are jointly provided with an end face tooth positioning piece, and each hollow adapter pin is internally provided with a bolt; the top and the bottom of the bolt are respectively embedded into the end face tooth positioning piece and the adapter flange; a floating linkage ring is arranged at the top of the adapter flange, the floating linkage ring comprises a bottom plate, fixing seats are arranged on the two sides of the bottom plate, and a guide key groove is formed in each fixing seat; by arranging the pull rod ball head connecting rod, the floating linkage ring, the left hemisphere nut, the left hemisphere nut, the floating linkage ring and the pressing claw, the single tensioning action of the machine tool oil cylinder is converted into the pressing action of a plurality of positions of a part to be machined, and therefore the structure of arranging a plurality of pressing oil cylinders is replaced; the technical problem that in the prior art, a traditional clamp cannot conduct floating pressing on parts with different heights is solved.

Description

Technical Field

[0001] The invention belongs to the field of automobile gearboxes and relates to a clamp, in particular to a floating pressing clamp. Background Art

[0002] Flanges are common components in automotive transmissions and other power transmission equipment, and face gearing is the most common connection method. Currently, the most common method for machining flange face gearing is through broaching on a face gear broaching machine in conjunction with a face gear broaching tool. Broaching machines and broaching tools are expensive, and tool life is limited. To ensure the precise relative position of the face gears and internal splines, multiple precision machining steps are required in the preceding process to achieve the face gearing process benchmark (machining accuracy significantly exceeding the design requirements of the part drawing) and ensure final face gear broaching accuracy. Furthermore, burrs formed during the broaching process are difficult to remove.

[0003] Precision forging of face teeth is currently the most cutting-edge process technology for face tooth forming. Compared with traditional face tooth broaching, precision forging of face teeth has continuous metal streamlines, better mechanical properties and a more economical processing route.

[0004] The traditional flange processing technology is: blank forging - rough turning one end - rough turning the other end - heat treatment - spline drawing - finish turning one end - finish turning the other end - drilling and boring - machining end face teeth - milling notches - deburring - black zinc plating - finish turning - polishing.

[0005] The process of precision forging flange is as follows: forging blank and notch - precision forging end face teeth and threaded holes - rough and fine turning of big end - fine turning of small end - heat treatment - spline drawing - black zinc plating - fine turning - polishing.

[0006] In contrast, replacing the drawn end face tooth process with the forged end face tooth process can save the entire flange process: one rough turning, one fine turning, one drilling and reaming, one milling notch, and one deburring, a total of 5 processes.

[0007] The difficulty in implementing the new process lies in the fact that conventional flange processing follows the principle of transferring precision from low to high, from roughing to finishing. Through finishing and boring, a high-precision process benchmark is created, ultimately ensuring a symmetry of 0.05 between the broached face gear and the internal spline. Forged face gear flanges are forged from the outset, but reliably transferring the forged face gear benchmark to the internal spline while enabling mass production on an automated production line is a major challenge, and the corresponding fixture design is crucial. Summary of the Invention

[0008] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a floating pressing clamp to solve the technical problem in the prior art that traditional clamps cannot perform floating pressing on parts of unequal heights.

[0009] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0010] A floating clamp comprises an adapter flange, a top portion of which is uniformly provided with a plurality of hollow adapter pins along the circumference, a plurality of hollow adapter pins having a common top portion provided with an end face tooth locating member, a bolt being provided in each of the hollow adapter pins, the top and bottom portions of the bolts being respectively embedded in the end face tooth locating member and the adapter flange;

[0011] A floating linkage ring is provided on the top of the adapter flange, and the floating linkage ring includes a bottom plate, fixed seats are provided on both sides of the bottom plate, and each of the fixed seats is provided with a guide keyway, a first mounting hole is provided at the center of the bottom plate, and a pair of second mounting holes are symmetrically provided on both sides of the first mounting hole;

[0012] A symmetrical left hemispherical nut and a left hemispherical nut are provided in the first mounting hole, a ball head connecting rod is provided in the circular cavity formed by the left hemispherical nut and the left hemispherical nut, the bottom of the ball head connecting rod extends out of the circular cavity and is provided with a pull rod; two symmetrical hollow transfer pins are provided in a pair of the second mounting holes;

[0013] A pair of symmetrical guide rings are provided on the top outer edge of the adapter flange, and each guide ring includes a mounting plate, and fixing protrusions are provided on both sides of the mounting plate. A pressure claw bearing raceway is provided on the mounting plate, and a pressure claw is rotatably provided in the pressure claw bearing raceway; the end of the pressure claw is hinged to the top of the fixed seat; a guide keyway is provided in the mounting plate, and a guide key is provided in the guide keyway, and the guide keyway is connected to the pressure claw bearing raceway.

[0014] The present invention also includes the following technical features:

[0015] A No. 1 pin is provided in the bearing raceway of the pressure claw, and the pressure claw can be rotatably sleeved on the No. 1 pin; a rolling bearing is provided between the pressure claw and the No. 1 pin.

[0016] A No. 1 opening retaining ring is provided at the end of the No. 1 pin.

[0017] A pair of pressure claw mounting pin holes are provided on the fixing seats on both sides of each guide keyway, and a No. 2 pin is provided in the pair of pressure claw mounting pin holes. The end of the pressure claw is hinged on the No. 2 pin, and a No. 2 opening retaining ring is provided on the No. 2 pin on both sides of the pressure claw.

[0018] The guide key is arranged in the guide key groove by a guide key screw.

[0019] The pull rod and the ball head connecting rod are connected by threads; the left hemispherical nut and the first mounting hole of the floating linkage ring are connected by threads.

[0020] The circular cavity is connected to the ball head of the ball head connecting rod arranged in the circular cavity by a ball joint.

[0021] Compared with the prior art, the present invention has the following beneficial technical effects:

[0022] (I) In the present invention, by providing a tie rod ball head connecting rod, a floating linkage ring, a left hemispherical nut, a left hemispherical nut, a floating linkage ring and a pressure claw, the single tightening action of the machine tool cylinder is converted into a clamping action to realize multiple positions of the part to be processed, thereby replacing the structure of providing multiple clamping cylinders and solving the technical problem in the prior art that traditional clamps cannot perform floating clamping on parts of unequal heights.

[0023] (II) The present invention can realize floating clamping, and has a very high tolerance for the shape and position tolerances of the clamped features of the processed parts. Even the blank surface can be reliably clamped without fine machining; without modification, it can be used on a rotary spindle (lathe, end face, external cylindrical grinder, etc.) with a single tensioning cylinder for multi-point floating clamping of parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a cross-sectional schematic diagram of the present invention;

[0025] Figure 2 for Figure 1 Schematic diagram of the middle part structure;

[0026] Figure 3 Schematic diagram of the assembly of the ball head connecting rod in the present invention;

[0027] Figure 4 Schematic diagram of the three-dimensional structure of the floating linkage ring in the present invention;

[0028] Figure 5 is a cross-sectional schematic diagram of the floating linkage ring in the present invention;

[0029] Figure 6 Schematic diagram of the three-dimensional structure of the guide ring in the present invention;

[0030] Figure 7 is a schematic cross-sectional view of the guide ring in the present invention;

[0031] Figure 8 This is a simulation diagram of the present invention when pressing parts of unequal heights.

[0032] The meanings of the various numbers in the figure are: tie rod 1, adapter flange 2, ball head connecting rod 3, guide key 4, hollow adapter pin 5, floating linkage ring 6, guide key screw 7, guide ring 8, No. 1 pin 9, No. 1 open retaining ring 10, rolling bearing 11, pressure claw 12, No. 2 pin 13, No. 2 open retaining ring 14, bolt 15, end face gear positioning piece 16, left hemispherical nut 17, left hemispherical nut 18;

[0033] Base plate 601, fixing seat 602, guide keyway 603, first mounting hole 604, second mounting hole 605, pressure claw mounting pin hole 606;

[0034] Mounting plate 801, fixing protrusion 802, pressure claw bearing raceway 803, guide keyway 804.

[0035] The specific contents of the present invention are further explained in detail below with reference to the embodiments. DETAILED DESCRIPTION

[0036] It should be noted that, unless otherwise specified, all components in the present invention are components known in the art.

[0037] Specific embodiments of the present invention are given below. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent modifications made on the basis of the technical solution of this application fall within the protection scope of the present invention.

[0038] The present invention provides a floating pressing fixture, see Figures 1 to 7 , including an adapter flange 2, a plurality of hollow adapter pins 5 are evenly arranged along the circumferential direction on the top of the adapter flange 2, and an end face tooth positioning member 16 is commonly provided on the top of the plurality of hollow adapter pins 5. A bolt 15 is provided in each hollow adapter pin 5, and the top and bottom of the bolt 15 are respectively embedded in the end face tooth positioning member 16 and the adapter flange 2;

[0039] A floating linkage ring 6 is provided on the top of the adapter flange 2. The floating linkage ring 6 includes a base plate 601. A fixing seat 602 is provided on both sides of the base plate 601. Each fixing seat 602 is provided with a guide keyway 603. A first mounting hole 604 is provided at the center of the base plate 601. A pair of second mounting holes 605 are symmetrically provided on both sides of the first mounting hole 604.

[0040] The first mounting hole 604 is provided with symmetrical left hemispherical nuts 17 and left hemispherical nuts 18. A ball connecting rod 3 is provided in the circular cavity formed by the left hemispherical nuts 17 and 18. The bottom of the ball connecting rod 3 extends out of the circular cavity and is provided with a pull rod 1. Two symmetrical hollow transfer pins 5 are provided in a pair of second mounting holes 605.

[0041] A pair of symmetrical guide rings 8 are provided on the top outer edge of the adapter flange 2, and each guide ring 8 includes a mounting plate 801, and fixed protrusions 802 are provided on both sides of the mounting plate 801. A pressure claw bearing raceway 803 is provided on the mounting plate 801, and a pressure claw 12 is rotatably provided in the pressure claw bearing raceway 803; the end of the pressure claw 12 is hinged to the top of the fixed seat 602; a guide keyway 804 is provided in the mounting plate 801, and a guide key 4 is provided in the guide keyway 804, and the guide keyway 804 is connected to the pressure claw bearing raceway 803.

[0042] In the above technical solution, the machine tool cylinder transmits the extension and contraction action of the cylinder to the pull rod 1, and the pull rod 1 drives the ball head of the ball head connecting rod 3 to rotate relative to the center of the circular cavity formed by the left hemispherical nut 17 and the left hemispherical nut 18, and moves along the axis of the ball head connecting rod 3; the left hemispherical nut 17, the left hemispherical nut 18 and the floating linkage ring 6 move together along the axis of the ball head connecting rod 3 and rotate around the center of the circular cavity formed by the left hemispherical nut 17 and the left hemispherical nut 18; at the same time, the floating linkage ring 6 also drives The pressure claw 12 moves along the axis of the ball head connecting rod 3 and rotates around the center of the circular cavity formed by the left hemispherical nut 17 and the left hemispherical nut 18; at the same time, combined with the rotation of the pressure claw 12 in the pressure claw bearing raceway 803, the pressure claw 12 can realize a triple plane compound motion of moving along the axis of the ball head connecting rod 3 in the plane of the guide key groove 603 parallel to the floating linkage ring 6 + rotating around the center of the circular cavity formed by the left hemispherical nut 17 and the left hemispherical nut 18 + rotating in the pressure claw bearing raceway 803.

[0043] The guide key 4 installed on the guide ring 8 cooperates with the guide key groove 603 on the floating linkage ring 6, constraining the floating linkage ring 6 and the left and right inner ball nuts to rotate around the center of the left and right inner ball nuts only in parallel to the plane of the floating linkage ring guide key groove.

[0044] In the present invention, by setting a pull rod 1, a ball head connecting rod 3, a floating linkage ring 6, a left hemispherical nut 17, a left hemispherical nut 18, a floating linkage ring and a pressure claw, the single tightening action of the machine tool cylinder is converted into a clamping action for realizing multiple positions of the parts to be processed, thereby replacing the structure of setting multiple clamping cylinders, and solving the technical problem in the prior art that traditional clamps cannot perform floating clamping on parts of unequal heights.

[0045] See also Figure 8 , the height difference of 2.5mm between the left and right clamping points of the parts shown is simulated. The floating linkage ring 6, the left hemispherical nut 17, the left hemispherical nut 18, and the left pressure claw 12 begin to rotate around the center of the circular cavity formed by the left hemispherical nut 17 and the left hemispherical nut 18 in a counterclockwise direction of 0.38° in the plane parallel to the guide keyway 603 of the floating linkage ring 6. The angles between the left pressure claw 12 and the horizontal plane are 161.96° and 158.31° respectively, finally realizing the floating clamping function.

[0046] A No. 1 pin 9 is provided in the pressure claw bearing raceway 803 , and a pressure claw 12 is rotatably sleeved on the No. 1 pin 9 ; a rolling bearing 11 is provided between the pressure claw 12 and the No. 1 pin 9 .

[0047] In the above technical solution, by setting pin No. 1 9 and rolling bearing 11, the pressure claw 12 can rotate on pin No. 1 9, and contacts the pressure claw bearing raceway 803 through the rolling bearing 11, and the sliding friction movement of the pressure claw 12 relative to the pressure claw bearing raceway 803 is converted into rolling contact between the rolling bearing 11 and the pressure claw bearing raceway, thereby reducing friction, reducing wear and extending service life.

[0048] The guide ring 8 is provided with a pressure claw bearing raceway 803 which is parallel and inclined up and down. The pressure claw bearing raceway 803 constrains the rolling bearing 11 which is hingedly connected to the pressure claw to move only parallel to the pressure claw bearing raceway 803 .

[0049] The end of the No. 1 pin 9 is provided with a No. 1 opening retaining ring 10 .

[0050] In the above technical solution, by clamping the No. 1 open retaining ring 10 on one end of the No. 1 pin 9, it is ensured that the No. 1 pin 9 will not fall out of the pin hole of the pressure claw 12, thereby ensuring the stability and safety of the structure.

[0051] A pair of pressure claw mounting pin holes 606 are provided on the fixing seat 602 on both sides of each guide keyway 603, and a No. 2 pin 13 is provided in the pair of pressure claw mounting pin holes 606. The end of the pressure claw 12 is hinged on the No. 2 pin 13, and a No. 2 opening retaining ring 14 is provided on the No. 2 pin 13 on both sides of the pressure claw 12.

[0052] In the above technical solution, the pressure claw 12 is installed on the No. 2 pin 13, and the No. 2 pin 13 is installed in the pressure claw installation pin hole 606 of the floating linkage ring 6. The No. 2 open retaining ring 14 ensures that the No. 2 pin 13 will not fall out of the pin hole of the floating linkage ring 6. That is, the pressure claw 12 is hingedly installed on the floating linkage ring 6. While the pressure claw 12 moves with the floating linkage ring 6, it can also rotate around the No. 2 pin 13. The movement of the pressure claw 12 with the floating linkage ring 6 is an active movement, and the rotation of the pressure claw 12 around the No. 2 pin 13 is a driven movement. The driven movement of the pressure claw 12 around the No. 2 pin 13 is completed by the rolling bearing 11 installed on the pressure claw 12 under the guidance of the pressure claw bearing raceway.

[0053] The guide key 4 is set in the guide key groove 804 by the guide key screw 7.

[0054] In the above technical solution, the guide key 4 cooperates with the keyway of the floating linkage ring 6 to guide the movement of the floating linkage ring 6 to be maintained in a plane parallel to the keyway surface of the floating linkage ring 6 .

[0055] The pressure jaw 12 moves along with the floating linkage ring 6 in a plane parallel to the keyway surface, ensuring effective contact between the outer cylindrical surface of the rolling bearing 11 installed on the pressure jaw 12 and the pressure jaw bearing raceway 803, and avoiding the end faces on both sides of the rolling bearing 11 installed on the pressure jaw 12 from interfering with any place and causing movement jamming.

[0056] The pull rod 1 and the ball head connecting rod 3 are connected by threads; the left hemispherical nut 17 and the left hemispherical nut 18 are connected by threads to the first mounting hole 604 of the floating linkage ring 6.

[0057] In the above technical solution, the left hemispherical nut 17 and the left hemispherical nut 18 wrap the ball head of the ball head connecting rod 3 and are merged into a complete nut, and are threadedly connected to the first mounting hole 604 of the floating linkage ring 6, driving the floating linkage ring 6 to move along the axial direction of the ball head connecting rod 3, while also allowing the floating linkage ring 6, the left hemispherical nut 17 and the left hemispherical nut 18 to rotate together around the center of the circular cavity formed by the left hemispherical nut 17 and the left hemispherical nut 18.

[0058] The circular cavity and the ball head of the ball head connecting rod 3 arranged in the circular cavity are connected by a ball joint.

[0059] In the above technical solution, the ball joint connection can realize the rotation of the center of the ball head connecting rod 3 relative to the center of the left hemispherical nut 17 and the left hemispherical nut 18, while driving the left hemispherical nut 17 and the left hemispherical nut 18 to move up and down along the axis of the ball head connecting rod 3.

Claims

1. A floating pressing fixture, characterized in that: The invention comprises an adapter flange (2), wherein a plurality of hollow adapter pins (5) are uniformly arranged along the circumferential direction on the top of the adapter flange (2), an end face tooth positioning member (16) is commonly arranged on the top of the plurality of hollow adapter pins 5, a bolt (15) is arranged in each of the hollow adapter pins 5, and the top and bottom of the bolt (15) are respectively embedded in the end face tooth positioning member (16) and the adapter flange (2); A floating linkage ring (6) is provided on the top of the adapter flange (2), and the floating linkage ring (6) includes a base plate (601), fixed seats (602) are provided on both sides of the base plate (601), and each fixed seat (602) is provided with a guide keyway (603), and a first mounting hole (604) is provided at the center of the base plate (601), and a pair of second mounting holes (605) are symmetrically provided on both sides of the first mounting hole (604); A symmetrical left hemispherical nut (17) and a left hemispherical nut (18) are provided in the first mounting hole (604); a ball head connecting rod (3) is provided in the circular cavity formed by the left hemispherical nut (17) and the left hemispherical nut (18); the bottom of the ball head connecting rod (3) extends out of the circular cavity and is provided with a pull rod (1); two symmetrical hollow transfer pins (5) are provided in a pair of the second mounting holes (605); A pair of symmetrical guide rings (8) are provided on the top outer edge of the adapter flange (2), and each guide ring (8) includes a mounting plate (801), and fixing protrusions (802) are provided on both sides of the mounting plate (801). A pressure claw bearing raceway (803) is provided on the mounting plate (801), and a pressure claw (12) is rotatably provided in the pressure claw bearing raceway (803); the end of the pressure claw (12) is hinged to the top of the fixed seat (602); a guide keyway (804) is provided in the mounting plate (801), and a guide key (4) is provided in the guide keyway (804), and the guide keyway (804) is connected to the pressure claw bearing raceway (803).

2. The floating pressing fixture according to claim 1, characterized in that: A No. 1 pin (9) is provided in the pressure claw bearing raceway (803), and the pressure claw (12) is rotatably sleeved on the No. 1 pin (9); a rolling bearing (11) is provided between the pressure claw (12) and the No. 1 pin (9).

3. The floating pressing fixture according to claim 2, characterized in that: A No. 1 opening retaining ring (10) is provided at the end of the No. 1 pin (9).

4. The floating pressing fixture according to claim 1, characterized in that: A pair of pressure claw mounting pin holes (606) are provided on the fixing seat (602) on both sides of each guide keyway (603), and a No. 2 pin (13) is provided in the pair of pressure claw mounting pin holes (606). The No. 2 pin (13) is hinged to the end of the pressure claw (12), and a No. 2 opening retaining ring (14) is provided on the No. 2 pin (13) on both sides of the pressure claw (12).

5. The floating pressing fixture according to claim 1, characterized in that: The guide key (4) is arranged in the guide key slot (804) via a guide key screw (7).

6. The floating pressing fixture according to claim 1, characterized in that: The pull rod (1) and the ball head connecting rod (3) are connected by threads; the left hemispherical nut (17) and the left hemispherical nut (18) are connected by threads to the first mounting hole (604) of the floating linkage ring (6).

7. The floating pressing fixture according to claim 1, wherein: The circular cavity is connected to the ball head of a ball head connecting rod (3) arranged in the circular cavity by a ball joint.

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