Flexible clamp mechanism for special-shaped thin-wall transmission box body

Abstract

The utility model relates to a flexible clamp mechanism for a special-shaped thin-wall transmission box body, and belongs to the technical field of machining. Comprising a body (1) fixedly connected to a four-jaw chuck; the floating adjusting mechanism is arranged in the central hole and the outer circular hole of the body (1); the positioning column (5) is arranged on the end face of the body (1); the balancing weight (9) is arranged on the body (1), axial pressure of the sliding barrel (3) is converted into radial floating thrust of the clamping jaws (2) by manually screwing the trapezoidal screw (8), operation is convenient and fast, machining preparation time can be effectively shortened, and batch production efficiency can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical processing, and in particular relates to a flexible clamp mechanism for a special-shaped thin-wall transmission box. Background Art

[0002] Worm gear and worm drive is a common transmission mechanism, which is widely used in components such as elevating machines and steering machines. The processing of worm gear housing mainly involves the processing of worm gear shaft hole system and worm shaft hole system. When processing the worm gear shaft hole system, compared with the milling and boring processing of the milling machining center, the use of CNC lathes to process the rotary hole system is more efficient and has better processing economy. Therefore, it is mostly carried out on CNC lathes.

[0003] In the production process, due to the complex structural characteristics of the worm gear housing casting, it is difficult to clamp it, and the inner hole is often used as a reference for clamping and positioning. Among them, the three-jaw chuck has the characteristics of self-centering, simple and convenient operation, but it is not suitable for clamping heavy parts; the four-jaw chuck has a strong clamping force and is suitable for clamping blanks, irregularly shaped parts or heavier parts. The disadvantage is that the clamping of each jaw needs to be adjusted one by one and multiple times to achieve the purpose of tightening, and the processing preparation time is long, which is not suitable for mass production. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] The technical problem to be solved by the utility model is: a flexible clamp mechanism for a special-shaped thin-wall transmission box body is used to solve the problem of low batch production efficiency of the existing clamping method.

[0006] (II) Technical solution

[0007] In order to solve the above technical problems, the utility model provides a flexible clamp mechanism for a special-shaped thin-walled transmission box, including: a main body 1, fixedly connected to a four-jaw chuck; a floating adjustment mechanism, arranged in the center hole and the outer circular hole of the main body 1; a positioning column 5 arranged on the end face of the main body 1; and a counterweight block 9 arranged on the main body 1.

[0008] Wherein, the body 1 comprises: a base 1-1, a support block 1-2, and a bracket 1-3;

[0009] The center of the base 1-1 is coaxially arranged with the center of the four-jaw chuck, and four U-shaped grooves are opened on the circumference. The support blocks 1-2 are arranged in pairs on the base 1-1 for limiting the circumference of the worm gear housing. The bracket 1-3 is arranged at the center of the base 1-1;

[0010] The bracket 1-3 is a cylindrical hollow cylinder, a positioning hole is opened on the outer circumferential side wall of the bracket 1-3, and a positioning column 5 is provided on the end surface of the bracket 1-3.

[0011] The floating adjustment mechanism includes: a claw 2, a slide cylinder 3, a nut 4, a spring sheet 6, a sleeve 7, a trapezoidal screw 8, and a spring sheet screw 10;

[0012] The sleeve 7 is fixed in the center hole of the base 1-1, a stepped hole is opened inside the sleeve 7, the slide 3 is arranged in the center hole of the bracket 1-3, the claw 2 is arranged in the outer circumferential positioning hole of the bracket 1-3, the trapezoidal screw 8 is arranged in the center hole of the slide 3, the trapezoidal external thread on it cooperates with the trapezoidal internal thread of the sleeve 7, and a square hole is opened on the end face of the trapezoidal screw 8 for manual axial adjustment;

[0013] The nut 4 is arranged at the stepped end surface of the trapezoidal screw 8 in the slide tube 3; the spring sheet 6 is arranged on the outer circular side wall of the bracket 1-3, and its two ends are respectively against the stepped surface of the claw 2 to prevent the claw 2 from falling off.

[0014] Among them, the base 1-1 is provided with four U-shaped grooves on its circumference, which are fixed to the end face of the four-jaw chuck by screws to form a rigid connection structure with the four-jaw chuck.

[0015] The number and position of the supporting blocks 1-2 are determined according to the structure of the box to be processed.

[0016] The slide cylinder 3 is evenly provided with three evenly distributed wedge-shaped sections on its circumference, and the sections are distributed axially.

[0017] Among them, one end face of the clamping claw 2 is a wedge-shaped section, which cooperates with the axial wedge-shaped section of the slide tube 3, and one end face is an arc tooth, which is used for clamping the inner hole of the part, and a step step is opened in the axial direction for pressing the spring sheet 6;

[0018] The clamping claws 2 and the spring sheets 6 are both provided at three locations in the circumferential direction, and the spring sheets 6 and the clamping claws 2 are evenly spaced on the circumference.

[0019] The end surface of the nut 4 is provided with a cross-shaped straight groove.

[0020] The positioning posts 5 are provided at three locations along the circumferential end surface of the bracket 1 - 3 for positioning the worm gear housing.

[0021] The number and position of the counterweights 9 are determined according to the worm gear housing structure and the clamping state.

[0022] (III) Beneficial effects

[0023] Compared with the prior art, the utility model has the following beneficial effects:

[0024] 1) Convenient and fast operation: By manually rotating the trapezoidal screw 8 using a tool, the clamping diameter can be adjusted, which is easy to operate and greatly shortens the processing preparation time;

[0025] 2) Flexibility and universality: The clamping diameters of the three clamping jaws 2 can be adjusted within a certain range to match different clamping diameters. When producing multiple varieties and small batches, when the adjustment range of the floating adjustment mechanism is exceeded, the fixture body 1 can be universal, without the need to make multiple sets of tooling. By replacing the clamping jaws 2 of different lengths, parts of different sizes can be clamped. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the utility model;

[0027] Figure 2 for Figure 1 Section view. DETAILED DESCRIPTION

[0028] In order to make the purpose, content, and advantages of the utility model clearer, the specific implementation methods of the utility model are further described in detail below in conjunction with the drawings and embodiments.

[0029] This embodiment provides a flexible clamp mechanism for a special-shaped thin-walled transmission box, including: a main body 1, fixedly connected to a four-jaw chuck; a floating adjustment mechanism, arranged in the center hole and the outer circular hole of the main body 1; a positioning column 5 arranged on the end face of the main body 1; and a counterweight block 9 arranged on the main body 1.

[0030] Wherein, the body 1 comprises: a base 1-1, a support block 1-2, and a bracket 1-3;

[0031] The center of the base 1-1 is coaxially arranged with the center of the four-jaw chuck, and four U-shaped grooves are opened on the circumference. The support blocks 1-2 are arranged in pairs on the base 1-1 for limiting the circumference of the worm gear housing. The bracket 1-3 is arranged at the center of the base 1-1;

[0032] The bracket 1-3 is a cylindrical hollow cylinder, a positioning hole is opened on the outer circumferential side wall of the bracket 1-3, and a positioning column 5 is provided on the end surface of the bracket 1-3.

[0033] The floating adjustment mechanism includes: a claw 2, a slide cylinder 3, a nut 4, a spring sheet 6, a sleeve 7, a trapezoidal screw 8, and a spring sheet screw 10;

[0034] The sleeve 7 is fixed in the center hole of the base 1-1, a stepped hole is opened inside the sleeve 7, the slide 3 is arranged in the center hole of the bracket 1-3, the claw 2 is arranged in the outer circumferential positioning hole of the bracket 1-3, the trapezoidal screw 8 is arranged in the center hole of the slide 3, the trapezoidal external thread on it cooperates with the trapezoidal internal thread of the sleeve 7, and a square hole is opened on the end face of the trapezoidal screw 8 for manual axial adjustment;

[0035] The nut 4 is arranged at the stepped end surface of the trapezoidal screw 8 in the slide tube 3; the spring sheet 6 is arranged on the outer circular side wall of the bracket 1-3, and its two ends are respectively against the stepped surface of the claw 2 to prevent the claw 2 from falling off.

[0036] Among them, the base 1-1 is provided with four U-shaped grooves on its circumference, which are fixed to the end face of the four-jaw chuck by screws to form a rigid connection structure with the four-jaw chuck.

[0037] The number and position of the supporting blocks 1-2 are determined according to the structure of the box to be processed.

[0038] The slide cylinder 3 is evenly provided with three evenly distributed wedge-shaped sections on its circumference, and the sections are distributed axially.

[0039] Among them, one end face of the clamping claw 2 is a wedge-shaped section, which cooperates with the axial wedge-shaped section of the slide tube 3, and one end face is an arc tooth, which is used for clamping the inner hole of the part, and a step step is opened in the axial direction for pressing the spring sheet 6;

[0040] The clamping claws 2 and the spring sheets 6 are both provided at three locations in the circumferential direction, and the spring sheets 6 and the clamping claws 2 are evenly spaced on the circumference.

[0041] The end surface of the nut 4 is provided with a cross-shaped straight groove.

[0042] The positioning posts 5 are provided at three locations along the circumferential end surface of the bracket 1 - 3 for positioning the worm gear housing.

[0043] The number and position of the counterweights 9 are determined according to the worm gear housing structure and the clamping state.

[0044] Working principle and working process:

[0045] When in use, the clamp is rigidly mounted on the four-jaw chuck by screws;

[0046] Insert the torque wrench into the square hole on the end face of the trapezoidal screw 8, turn the torque wrench clockwise to adjust the trapezoidal screw 8 to move axially inward, and generate an axial pressure on the end face of the slide 3. Since the axial wedge-shaped section of the slide 3 cooperates with the wedge-shaped section of the end face of the claw 2, it is converted into a radial thrust of the claw 2, so that the claw 2 extends radially and the clamping diameter increases;

[0047] On the contrary, if the torque wrench is turned counterclockwise, the trapezoidal screw 8 moves axially outward, the axial pressure on the end face of the slide tube 3 disappears, and the end face of the clamping jaw 2 generates a radial pressure under the pressure of the spring sheet 6, which causes the clamping jaw 2 to contract radially and convert into an axial thrust of the slide tube 3, pushing the slide tube 3 to move axially outward, and the clamping diameter becomes smaller at this time;

[0048] After the clamping diameter is adjusted appropriately, use a flat-head wrench to tighten the nut 4 and the trapezoidal screw 8.

[0049] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A flexible clamp mechanism for a special-shaped thin-walled transmission box, characterized in that: include: The body (1) is fixedly connected to the four-jaw chuck; the floating adjustment mechanism is arranged in the center hole and the outer circular hole of the body (1); The positioning column (5) is arranged on the end surface of the main body (1); the counterweight block (9) is arranged on the main body (1); The body (1) comprises: a base (1-1), a support block (1-2), and a bracket (1-3); The center of the base (1-1) is coaxially arranged with the center of the four-jaw chuck, and four U-shaped grooves are opened on the circumference. The support blocks (1-2) are arranged in pairs on the base (1-1) and are used to limit the circumference of the worm gear housing. The bracket (1-3) is arranged at the center of the base (1-1); The bracket (1-3) is a cylindrical hollow cylinder, a positioning hole is provided on the outer circumferential side wall of the bracket (1-3), and a positioning column (5) is provided on the end surface of the bracket (1-3); The floating adjustment mechanism comprises: a claw (2), a slide cylinder (3), a nut (4), a spring sheet (6), a sleeve (7), a trapezoidal screw (8), and a spring sheet screw (10); The sleeve (7) is fixed in the center hole of the base (1-1), a stepped hole is provided inside the sleeve (7), the slide cylinder (3) is arranged in the center hole of the bracket (1-3), the claw (2) is arranged in the outer circumferential positioning hole of the bracket (1-3), the trapezoidal screw (8) is arranged in the center hole of the slide cylinder (3), the trapezoidal external thread on the slide cylinder cooperates with the trapezoidal internal thread of the sleeve (7), and a square hole is provided on the end face of the trapezoidal screw (8) for manual axial adjustment; The nut (4) is arranged at the stepped end surface of the trapezoidal screw (8) inside the slide cylinder (3); the spring sheet (6) is arranged on the outer circular side wall of the bracket (1-3), and its two ends respectively abut against the stepped surface of the claw (2) to prevent the claw (2) from falling off.

2. The flexible clamp mechanism for a special-shaped thin-walled transmission box according to claim 1, characterized in that: The base (1-1) is provided with four U-shaped grooves on its circumference and is fixed to the end surface of the four-jaw chuck by screws to form a rigid connection structure with the four-jaw chuck.

3. The flexible clamp mechanism for a special-shaped thin-walled transmission box according to claim 1, characterized in that: The number and position of the support blocks (1-2) are determined according to the structure of the box to be processed.

4. The flexible clamp mechanism for a special-shaped thin-walled transmission box according to claim 1, characterized in that: The slide cylinder (3) is provided with three evenly distributed wedge-shaped sections evenly distributed on its circumference, and the sections are distributed axially.

5. The flexible clamp mechanism for a special-shaped thin-walled transmission box according to claim 1, characterized in that: One end face of the clamping claw (2) is a wedge-shaped section, which cooperates with the axial wedge-shaped section of the slide cylinder (3), and one end face is a circular arc tooth, which is used for clamping the inner hole of the part, and a stepped step is provided in the axial direction, which is used for pressing the spring sheet (6); The clamping claw (2) and the spring sheet (6) are both provided at three locations in the circumferential direction, and the spring sheet (6) and the clamping claw (2) are distributed at equal intervals on the circumference.

6. The flexible clamp mechanism for a special-shaped thin-walled transmission box according to claim 1, characterized in that: The end surface of the nut (4) is provided with a cross-shaped straight groove.

7. The flexible clamp mechanism for a special-shaped thin-walled transmission box according to claim 1, characterized in that: The positioning columns (5) are provided at three locations along the circumferential end surface of the bracket (1-3) and are used for positioning the worm gear housing.

8. The flexible clamp mechanism for a special-shaped thin-walled transmission box according to claim 1, characterized in that: The number and position of the counterweight blocks (9) are determined according to the worm gear housing structure and the clamping state.

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