Differential shell drilling clamp

Abstract

The utility model relates to a drilling clamp for a differential shell, which is a hydraulic clamp and comprises a driving mechanism mounted on a base, a positioning mechanism bottom plate driven by the driving mechanism, and a centering mechanism, a bottom surface positioning mechanism and an angular positioning pin which are arranged on the bottom plate, the centering mechanism is arranged in the center of the bottom plate; the bottom surface positioning mechanism is arranged along the periphery of the centering mechanism and comprises four positioning blocks which are uniformly distributed; each angular positioning pin is arranged between every two adjacent positioning blocks; the pressing oil cylinders are arranged on the periphery of the positioning mechanism and matched with the positioning blocks in position. A pressing plate is arranged at the telescopic end of the pressing oil cylinder. A clamped workpiece is driven by the driving mechanism to rotate so as to complete machining of 0 degree, 90 degrees and 270 degrees in the circumferential direction, drilling machining of all flange holes, straight-line-shaped shaft holes and lock pin holes is completed through three times of angle changes, the machining technological process is shortened, the production efficiency is improved, the equipment utilization rate is effectively improved, and therefore the input cost is saved; and the device is very practical in practical use.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of machining manufacturing technology relates to a kind of fixture of differential mechanism shell processing, especially, it is a kind of differential mechanism shell drilling jig that can be clamped once to complete the processing of all flange hole, straight axle hole and lock pin hole. BACKGROUND

[0002] After differential mechanism shell casting processing is completed, it needs to be machined to complete the drilling of flange hole, straight axle hole and lock pin hole, as shown in Figure 3 、 Figure 4 Multiple flange holes A, straight axle holes B and lock pin holes C of differential mechanism shell are located at different machining planes respectively, and during drilling process, multiple processes and multiple stations are usually used to manually clamp and then machine, which can lead to low production efficiency, high production cost, and scrap products due to improper clamping of workpieces, accelerated tool consumption, and even machine damage and personnel injury, which is more harmful than beneficial in terms of cost or safety.

[0003] Therefore, it is necessary to further optimize differential mechanism shell hole processing fixture. SUMMARY

[0004] The utility model discloses in order to solve the above-mentioned differential mechanism shell drilling process in multiple processes, multiple stations and the manual clamping of the production efficiency low, high production cost and the security hidden danger problem of causing, and propose a kind of differential mechanism shell drilling jig that can be clamped once to complete the processing of all flange hole, straight axle hole and lock pin hole.

[0005] The utility model discloses the following technical schemes are realized:

[0006] The differential mechanism shell drilling jig described above, the fixture is hydraulic fixture, the fixture includes base, drive mechanism, positioning mechanism, clamping mechanism;The drive mechanism is installed on the base;The positioning mechanism includes bottom plate and sets up in the centering mechanism, bottom surface positioning mechanism, angular orientation pin of the bottom plate;The bottom plate is driven by the drive mechanism;The centering mechanism is set in the center of the bottom plate;The bottom surface positioning mechanism is set along the outer periphery of the centering mechanism, including four positioning blocks evenly distributed;The angular orientation pin is set between the adjacent two positioning blocks of the bottom surface positioning mechanism;The clamping mechanism includes pressing cylinder;The pressing cylinder is separately arranged at the outer periphery of the positioning mechanism, and is matched with the position of the positioning block;The telescopic end of the pressing cylinder is provided with pressing plate, and the pressing plate extends to the top of the positioning block towards the center.

[0007] The differential housing drilling clamp, wherein the driving mechanism comprises a four-axis rotary table and a four-axis tailstock arranged oppositely; the bottom plate is provided with an oil channel and a plurality of oil channel interfaces, and the two ends are connected with the four-axis rotary table and the four-axis tailstock through connecting plates, respectively; and the connecting plates are fixedly connected with the rotary shafts of the four-axis rotary table and the four-axis tailstock, respectively.

[0008] The differential housing drilling clamp, wherein the centering mechanism comprises a circular base plate and a claw; the circular base plate is hollow in the center; the claw is driven by an oil cylinder and is three arc-shaped blocks with the same radian; the three claws are uniformly distributed along the circumference of the hollow column of the circular base plate and protrude from the upper end surface of the circular base plate to form a columnar accommodation space matched with the outer diameter of the half shaft hole of the end part of the differential housing.

[0009] The differential housing drilling clamp, wherein the bottom surface positioning mechanism comprises an annular support; the annular support is sleeved on the outer periphery of the circular base plate of the centering mechanism, and the upper end surface is provided with four bosses uniformly distributed; the positioning blocks are fixedly installed on the four bosses of the upper end surface of the annular support; and the angular positioning pins are arranged on the annular support.

[0010] The differential housing drilling clamp, wherein the bottom plate is provided with an oil channel and is in a plate-shaped structure and can be detachably connected with external equipment.

[0011] The differential housing drilling clamp, wherein the clamp comprises a gas detection device arranged on the positioning block.

[0012] The differential housing drilling clamp, wherein the clamp comprises a workpiece chip flushing mechanism; the workpiece chip flushing mechanism has four groups and is symmetrically arranged at the two ends of the bottom plate and comprises a mounting seat and a gas nozzle arranged on the mounting seat; the gas nozzle is in communication with an external gas source and has an opening end protruding towards the workpiece. Beneficial effects

[0013] The differential housing drilling clamp has the advantages that the positioning mechanism is reasonably arranged, the centering mechanism and the angular positioning pins are matched, the foolproof function and the gas detection error prevention function are configured, the product qualification rate is greatly improved, the workpiece is driven to rotate by the driving mechanism to complete the machining in the circumferential direction of 0°, 90° and 270°, the drilling machining of all flange holes, one-hole shaft holes and lock pin holes is completed through three angle changes, the machining process is shortened, the production efficiency is greatly improved, the equipment utilization rate is effectively improved, the input cost is saved, the enterprise benefits are increased, and the differential housing drilling clamp is very practical in actual use. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structural schematic view of the differential housing drilling clamp.

[0015] Figure 2 This is a top view of the differential housing drilling fixture of this utility model;

[0016] Figure 3 , Figure 4 This is a schematic diagram of the differential housing. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0019] In the description of the embodiments of this application, the technical terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and other indications of the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0020] The present invention will now be described in detail with reference to the accompanying drawings.

[0021] like Figures 1-2 As shown, the differential housing drilling fixture of this utility model is a hydraulic fixture, including a base 1, a drive mechanism 2, a positioning mechanism 3, a clamping mechanism 4, an air detection device 5, and a workpiece chip removal mechanism 6.

[0022] The base 1 is used to support the entire fixture and connect to external equipment (not shown). The base 1 is equipped with oil passages. It can be understood that the base 11 can be a plate-like structure. The base 11 can be detachably connected to the external equipment, such as by pins, bolts, etc. The external equipment can be a CNC machine tool, etc.

[0023] The drive mechanism 2 is mounted on the base 1 and includes a four-axis turntable 21 and a four-axis tailstock 22. The four-axis turntable 21 and the four-axis tailstock 22 are arranged opposite to each other and are respectively mounted and fixed at both ends of the upper surface of the base 1.

[0024] The positioning mechanism 3 comprises a bottom plate 31, a centering mechanism 32, a bottom surface positioning mechanism 33 and an angular positioning pin 34.

[0025] The bottom plate 31 is used for mounting the centering mechanism 32, the clamping mechanism 4, the gas detection device 5 and the workpiece, which are driven by the driving mechanism 2. The bottom plate 31 is provided with an oil way and a plurality of oil way interfaces, and the two ends are connected with the four-axis turntable 21 and the four-axis tailstock 22 through the connecting plates 311, respectively. The connecting plates 311 are fixedly connected with the rotating shafts of the four-axis turntable 21 and the four-axis tailstock 22, respectively. Thus, the bottom plate 31 is driven to rotate by the four-axis turntable 21, and the four-axis tailstock 22 supports one end of the bottom plate 31 away from the four-axis turntable 21.

[0026] The centering mechanism 32 is arranged in the center of the bottom plate 31 and comprises a circular base plate 321 and a jaw 322. The circular base plate 321 is in a cylindrical hollow shape in the center. The jaw 322 is driven by an oil cylinder and is an arc-shaped block with the same radian. The three jaws 322 are uniformly distributed along the circumference of the cylindrical hollow of the circular base plate 321 and protrude above the upper end surface of the circular base plate 321 to form a cylindrical accommodation space. The cylindrical accommodation space matches the outer diameter of the half shaft hole at the end of the differential housing.

[0027] The bottom surface positioning mechanism 33 is arranged along the outer periphery of the centering mechanism 32 and comprises an annular support 331 and a positioning block 332. The annular support 331 is sleeved on the outer periphery of the circular base plate 321 of the centering mechanism 32, and the upper end surface has four protrusions uniformly distributed thereon. The positioning block 332 has four positioning blocks uniformly distributed thereon, which are fixedly installed on the four protrusions on the upper end surface of the annular support 331.

[0028] The angular positioning pin 34 is used for radial positioning and is arranged on the annular support 331 of the bottom surface positioning mechanism 33 between the adjacent two positioning blocks 332.

[0029] The clamping mechanism 4 is used for clamping the workpiece and has four clamping mechanisms uniformly distributed around the periphery. The clamping mechanism 4 comprises a pressing oil cylinder 41 and a pressing plate 42. The pressing oil cylinder 41 is arranged on the outer periphery of the positioning mechanism 3 and matches the positions of the positioning blocks 332 of the positioning mechanism 3 and extends towards the center. The pressing plate 42 matches the pressing oil cylinder 41 and is fixedly installed on the extension end of the four pressing oil cylinders 41, respectively, and extends towards the center to above the positioning blocks 332.

[0030] The gas detection device 5 is arranged on the positioning blocks 332 of the positioning mechanism 3 and at least one gas detection device 5 is arranged. In this embodiment, the gas detection device 5 matches the positioning blocks 332 and has four gas detection devices, which are arranged on the four positioning blocks 332.

[0031] The workpiece chip punching mechanism 6 has four groups and is symmetrically arranged at the two ends of the bottom plate 31 and communicates with the external gas source. The chip punching mechanism 6 comprises a mounting seat 61 and a jet nozzle 62 on the mounting seat 61. The jet nozzle 62 communicates with the external gas source and the opening end extends towards the workpiece.

[0032] The operation instruction of the differential housing drilling clamp is as follows:

[0033] The half shaft hole at one end of the differential housing to be machined is placed into the centering mechanism, the angle is adjusted through the angular positioning pin, the centering mechanism is driven by the oil cylinder to clamp and center the differential housing to be machined through the three clamping claws, then the four pressing oil cylinders act simultaneously to press the differential housing to be machined through the pressing plate, then the air detection device detects whether the clamping is in place, after the clamping is correct, the machine tool starts machining, the rotary table is located at 0° to machine all the flange holes and the lock pin holes, at 90° to machine the one-axis hole on one side, and at 270° to machine the one-axis hole on the other side, thus, the machining of all the flange holes, the one-axis holes and the lock pin holes of the workpiece is completed, and the chip punching device cleans the redundant iron chips on the clamp after the machining is completed.

[0034] The differential housing drilling clamp has the functions of fool-proof and air detection error-proof through the cooperation of the centering mechanism of the positioning mechanism and the angular positioning pin, the workpiece is rotated through the clamping of the driving mechanism, different machining surfaces of the workpiece are adjusted to be adapted to the cutting tool, the machining process is shortened, the production efficiency is greatly improved, the equipment utilization is effectively improved, the input cost is saved, the enterprise benefits are increased, and the differential housing drilling clamp has the advantages of high efficiency, high equipment utilization, low cost and high enterprise benefits.

[0035] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A differential housing drilling fixture, wherein the fixture is a hydraulic fixture, characterized in that: The fixture includes a base, a drive mechanism, a positioning mechanism, and a clamping mechanism; The drive mechanism is mounted on the base; The positioning mechanism includes a base plate and a centering mechanism, a bottom positioning mechanism, and angular positioning pins disposed on the base plate; the base plate is driven by the driving mechanism; the centering mechanism is disposed at the center of the base plate; the bottom positioning mechanism is disposed along the outer periphery of the centering mechanism and includes four evenly distributed positioning blocks; the angular positioning pins are disposed between two adjacent positioning blocks of the bottom positioning mechanism. The clamping mechanism includes a clamping cylinder; the clamping cylinder is disposed on the outer periphery of the positioning mechanism and matches the position of the positioning block; the telescopic end of the clamping cylinder is provided with a pressure plate, which extends towards the center and above the positioning block.

2. The differential housing drilling fixture as described in claim 1, characterized in that: The drive mechanism includes a four-axis rotary table and a four-axis tailstock arranged opposite to each other; The base plate is provided with oil passages and multiple oil passage interfaces. Both ends are connected to the four-axis turntable and the four-axis tailstock respectively through connecting plates. The upper part of the connecting plate is fixedly connected to the four-axis turntable and the four-axis tailstock rotating shaft respectively.

3. The differential housing drilling fixture as described in claim 1, characterized in that: The centering mechanism includes a circular chassis and pawls; the circular chassis has a cylindrical hollow center; the pawls are driven by a hydraulic cylinder and are three arc-shaped blocks of the same arc. These three pawls are evenly distributed along the cylindrical hollow circumference of the circular chassis and extend above the upper surface of the circular chassis to form a cylindrical positioning space. This cylindrical positioning space matches the outer diameter of the half-shaft hole at the end of the differential housing.

4. The differential housing drilling fixture as described in claim 3, characterized in that: The bottom positioning mechanism includes an annular support; the annular support is sleeved on the outer periphery of the circular base of the centering mechanism, and has four evenly distributed protrusions on its upper end face; the positioning blocks are respectively fixedly installed on the four protrusions on the upper end face of the annular support. The angular locating pin is disposed on the annular support.

5. The differential housing drilling fixture as described in claim 1, characterized in that: The base is equipped with oil channels and has a plate-like structure, which can be detachably connected to external equipment.

6. The differential housing drilling fixture as described in claim 1, characterized in that: The fixture includes a gas detection device, which is mounted on the positioning block.

7. The differential housing drilling fixture as described in claim 1, characterized in that: The fixture includes a workpiece chip-removing mechanism; the workpiece chip-removing mechanism has four sets, symmetrically arranged at both ends of the base plate, including a mounting base and an air nozzle thereon; The jet nozzle is connected to an external air source, with its open end extending towards the workpiece.

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