Large gear ring self-centering clamp

Abstract

The utility model belongs to the technical field of gear machining clamps, and particularly relates to a large gear ring self-centering clamp which comprises a base and a hydraulic chuck fixed to the center of the base, a plurality of clamping jaws are evenly arranged on the hydraulic chuck along the circumference, a pull rod is fixed to each clamping jaw outwards, and the pull rods are arranged in the radial direction of the hydraulic chuck. One end of each pull rod is connected with the corresponding clamping jaw, and the other end of each pull rod is connected with a clamping block which is arranged on the base in a sliding mode. The longitudinal section of each clamping block is in an L shape, each clamping block comprises a horizontally-arranged supporting plate and a check block perpendicularly arranged on the outer side of the supporting plate, the check blocks are perpendicular to the supporting plates, L-shaped included angles formed by the check blocks and the supporting plates are arranged in the direction of the central axis of the hydraulic chuck, the supporting plates are located on the same horizontal plane, and the distances between the check blocks and the central axis of the hydraulic chuck are equal. The automatic centering device can rapidly and automatically center, and is high in machining efficiency and precision.

Description

Technical Field

[0001] This utility model belongs to the field of gear processing fixture technology, and in particular relates to a self-centering fixture for a large gear ring. Background Technology

[0002] After the large gear ring is initially formed, it requires further finer processing such as milling and chamfering. During processing, the large gear ring needs to be clamped and fixed to ensure its machining accuracy. Traditional large gear ring fixtures are mainly pressure plate type fixtures. After placing the large gear ring on the bracket, the gear ring is manually tapped and adjusted to be centered before being pressed and fixed by the pressure plate. While the pressure plate type fixture has a relatively simple structure, due to the large diameter of the gear shaping teeth and the slow rotation of the gear shaping machine's rotary table, the quality of the processed products is greatly affected by the operator's skill level. Furthermore, the long alignment time affects production efficiency. Generally, larger diameter gear rings also have larger modules and larger material removal volumes, while the gear shaping machining cycle is long. Therefore, reducing the number of passes will significantly improve production efficiency. This necessitates ensuring sufficient clamping force from the fixture, and existing pressure plate type fixtures no longer meet the manufacturer's requirements. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies and provide a large gear ring self-centering fixture that can quickly and automatically center the gear, with high processing efficiency and precision.

[0004] The objective of this utility model is achieved through the following technical solutions:

[0005] A self-centering fixture for a large gear ring is characterized in that: it includes a base and a hydraulic chuck fixed at the center of the base. The hydraulic chuck has multiple jaws evenly arranged along its circumference. Each jaw has a pull rod fixed to its outward side. The pull rod is arranged radially along the hydraulic chuck. The multiple pull rods are on the same horizontal plane. One end of the pull rod is connected to the jaw, and the other end of the pull rod is connected to a clamping block. The clamping block is slidably arranged on the base.

[0006] The clamping block has an L-shaped longitudinal section and includes a horizontally arranged support plate and a vertically arranged stop block on the outside of the support plate. The stop block is perpendicular to the support plate, and the L-shaped angle formed by the stop block and the support plate is directed toward the central axis of the hydraulic chuck. Multiple support plates are all on the same horizontal plane, and multiple stop blocks are all equidistant from the central axis of the hydraulic chuck.

[0007] Based on the above structure, after the large gear ring is placed on the support plate, the hydraulic chuck pulls the jaws at the same time. The jaws drive the clamping blocks to lock synchronously through the pull rod. Multiple clamping blocks pull the large gear ring towards the central axis of the hydraulic chuck at the same time, which can realize accurate and fast self-centering clamping of the large gear ring.

[0008] Furthermore, the base is provided with a slide rail arranged radially along the hydraulic chuck at a position corresponding to the clamping block, and the bottom of the clamping block is provided with a slide seat that is slidably connected to the slide rail, and the clamping block moves on the slide rail through the slide seat.

[0009] Furthermore, the slide block includes a slider that is slidably connected to the slide rail and a trapezoidal support fixed on the top of the slider. The top of the support has a first mounting hole for mounting the clamping block, and the clamping block has a second mounting hole at a position corresponding to the first mounting hole. It also includes a bolt, which passes through the second mounting hole and the first mounting hole in sequence and fixes the clamping block to the top of the support.

[0010] Preferably, the number of clamping blocks is three or more.

[0011] Preferably, the number of clamping blocks is 4.

[0012] Preferably, the base is a disc-shaped base.

[0013] Compared with the prior art, this utility model has the following features and beneficial effects:

[0014] 1. In this utility model, after the large gear ring is placed on the support plate, the hydraulic chuck pulls the jaws at the same time. The jaws drive the clamping blocks to lock synchronously through the pull rod. Multiple clamping blocks pull the large gear ring towards the central axis of the hydraulic chuck at the same time, which can realize accurate and fast self-centering clamping of the large gear ring.

[0015] 2. The number of clamping blocks is 3 or more, preferably 4. The presence of 3 or more clamping blocks can ensure the stability of the large gear ring.

[0016] 3. All the pallets are on the same horizontal plane, which can ensure that the large gear ring placed on the pallet can be placed horizontally, thus ensuring its machining accuracy.

[0017] 4. All the stops are equidistant from the central axis of the hydraulic chuck. When all the stops abut against the large gear ring placed on the pallet, the large gear ring will automatically center itself. The process is simple and quick.

[0018] 5. The support table can be set to increase the height of the large gear ring, which facilitates simultaneous machining of the top and bottom surfaces of the large gear ring without repeated clamping, reducing machining errors and improving the accuracy of the gear ring.

[0019] 6. Since the clamping blocks are detachably mounted on the support platform, they can be replaced in time if damaged, ensuring machining accuracy. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0021] In the diagram: 1. Base; 2. Hydraulic chuck; 3. Claw; 4. Pull rod; 5. Clamping block; 6. Support plate; 7. Stop block; 8. Slide rail; 9. Slide seat; 10. Slider; 11. Support platform; 12. Second mounting hole. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings.

[0023] A self-centering fixture for a large gear ring includes a base 1 and a hydraulic chuck 2 fixed at the center of the base 1. The base 1 is preferably disc-shaped. The hydraulic chuck 2 has multiple jaws 3 evenly arranged along its circumference. Each jaw 3 is fixed with a pull rod 4 facing outward. The pull rods 4 are arranged radially along the hydraulic chuck 2. The multiple pull rods 4 are on the same horizontal plane. One end of the pull rod 4 is connected to the jaw 3, and the other end of the pull rod 4 is connected to a clamping block 5. The clamping blocks 5 are slidably arranged on the base 1. The number of clamping blocks 5 is 3 or more, preferably 4. The presence of 3 or more clamping blocks can ensure the stability of the large gear ring.

[0024] The clamping block 5 has an L-shaped longitudinal section and includes a horizontally positioned support plate 6 and a vertically positioned stop block 7 on the outside of the support plate 6. The stop block 7 is perpendicular to the support plate 6, and the L-shaped angle formed by the stop block 7 and the support plate 6 is directed towards the central axis of the hydraulic chuck 2. Multiple support plates 6 are all on the same horizontal plane, ensuring that the large gear ring placed on the support plate 6 can be placed horizontally, thus ensuring its machining accuracy. Multiple stop blocks 7 are equidistant from the central axis of the hydraulic chuck 2. When all multiple stop blocks 7 abut against the large gear ring placed on the support plate 6, the large gear ring will automatically center itself, a simple and quick process.

[0025] Furthermore, the base 1 is provided with a slide rail 8 arranged radially along the hydraulic chuck 2 at the position corresponding to the clamping block 5, and the bottom of the clamping block 5 is provided with a slide seat 9 that is slidably connected to the slide rail 8, and the clamping block 5 moves on the slide rail 8 through the slide seat 9.

[0026] Furthermore, the slide block 9 includes a slider 10 slidably connected to the slide rail 8 and a trapezoidal support 11 fixed to the top of the slider 10. The support 11 can accommodate the height of the large gear ring, facilitating simultaneous machining of the top and bottom surfaces of the large gear ring without repeated clamping, reducing machining errors and improving gear ring accuracy. The top of the support 11 has a first mounting hole for mounting the clamping block 5, and the clamping block 5 has a second mounting hole 12 corresponding to the first mounting hole. It also includes bolts, which pass through the second mounting hole 12 and the first mounting hole in sequence to fix the clamping block 5 to the top of the support 11. Since the clamping block 5 is detachably mounted on the support 11, it can be replaced promptly if damaged, ensuring machining accuracy.

[0027] During operation, the large gear ring is first placed on the support plate 6. Simultaneously, the hydraulic chuck 2 pulls the jaws 3, which, via the pull rod 4, drive the clamping blocks 5 to lock synchronously. Multiple stop blocks 7 simultaneously pull the large gear ring towards the central axis of the hydraulic chuck 2 until all stop blocks 7 abut against the outer edge of the large gear ring and clamp it. Since the distances between the multiple stop blocks 7 and the central axis of the hydraulic chuck 2 are approximately equal, the large gear ring will automatically center itself after the clamping blocks 5 clamp it. This invention enables accurate and rapid self-centering clamping of the large gear ring, improving production efficiency and processing precision.

[0028] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A self-centering fixture for a large gear ring, characterized in that: The device includes a base and a hydraulic chuck fixed at the center of the base. The hydraulic chuck has multiple jaws evenly arranged along its circumference. Each jaw is fixed with a pull rod facing outward. The pull rods are arranged radially along the hydraulic chuck. The multiple pull rods are on the same horizontal plane. One end of the pull rod is connected to the jaw, and the other end of the pull rod is connected to a clamping block. The clamping block is slidably arranged on the base. The clamping block has an L-shaped longitudinal section and includes a horizontally arranged support plate and a vertically arranged stop block on the outside of the support plate. The stop block is perpendicular to the support plate, and the L-shaped angle formed by the stop block and the support plate is directed toward the central axis of the hydraulic chuck. Multiple support plates are all on the same horizontal plane, and multiple stop blocks are all equidistant from the central axis of the hydraulic chuck.

2. The self-centering fixture for a large gear ring according to claim 1, characterized in that: The base is provided with a slide rail arranged radially along the hydraulic chuck at the position corresponding to the clamping block, and the bottom of the clamping block is provided with a slide seat that is slidably connected to the slide rail. The clamping block moves on the slide rail through the slide seat.

3. The self-centering fixture for a large gear ring according to claim 2, characterized in that: The slide block includes a slider that is slidably connected to the slide rail and a trapezoidal support fixed on the top of the slider. The top of the support has a first mounting hole for mounting a clamping block, and the clamping block has a second mounting hole at a position corresponding to the first mounting hole. The slide block also includes a bolt, which passes through the second mounting hole and the first mounting hole in sequence and fixes the clamping block to the top of the support.

4. The self-centering fixture for a large gear ring according to claim 1, characterized in that: The number of clamping blocks is three or more.

5. The self-centering fixture for a large gear ring according to claim 1, characterized in that: The number of clamping blocks is 4.

6. The self-centering fixture for a large gear ring according to claim 1, characterized in that: The base is a disc-shaped base.

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