Feeding clamp for hub bearing machining

Abstract

The utility model relates to the technical field of machining, in particular to a feeding clamp for hub bearing machining, which comprises a plurality of clamping jaws capable of getting close to or away from one another, the plurality of clamping jaws are positioned on the same circumference, each clamping jaw is provided with a clamping finger, the clamping finger comprises a near clamping finger and a far clamping finger, and the near clamping finger and the far clamping finger are positioned on the same circumference. The distance between the near clamping fingers and the center of the circumference is smaller than the distance between the far clamping fingers and the center of the circumference, the near clamping fingers and the far clamping fingers are spaced in the projection direction of the center line of the circumference, the near clamping fingers and the far clamping fingers are detachably connected to the clamping jaw, and the distance between the far clamping fingers and the near clamping fingers can be adjusted. According to the scheme, the problems that in the prior art, due to the fact that feeding clamps needed for machining of small inner rings of hub bearings cannot be unified, the clamp management cost is high, and the universality of the feeding clamps is low are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of machining, in particular to a loading fixture for machining a hub bearing. Background Art

[0002] The main function of the wheel hub bearing assembly is to bear weight. It is an indispensable part of the automobile. The wheel hub bearing assembly includes an inner ring, a small inner ring, an outer ring, rolling elements and a cage. Two rows of raceways are arranged on the outer ring, and one row of raceways are arranged on the inner ring and the small inner ring respectively. The rolling elements are located in the raceways under the action of the cage and move in the raceways when the inner ring and outer ring of the wheel hub bearing rotate relative to each other.

[0003] When the wheel hub bearing assembly is in use, it needs to be connected to the rim, brake disc and steering knuckle. Therefore, milling and drilling are required on the inner ring flange and / or outer ring flange of the wheel hub bearing. Milling is performed to ensure the accuracy of the matching surface, and drilling is performed to facilitate the connection between the inner ring or outer ring of the wheel hub bearing and the rim / brake disc / steering knuckle.

[0004] For the wheel hub bearing parts that serve as the inner ring, the inner ring includes an integrally formed flange section and a stepped shaft section. Both the flange section and the stepped shaft section need to be machined, and because the stepped shaft section has higher requirements for surface quality, one-time machining often cannot meet the molding requirements. At present, the common machining methods include flange section machining (end face, outer peripheral surface, hole position, etc.), stepped shaft section preliminary machining (shaft outer peripheral surface machining, end face machining), and stepped shaft section fine machining (shaft outer peripheral surface machining, end face machining). When machining at different positions, the workpiece is clamped at different positions by the machining equipment, so that the positions that can be clamped when the workpiece is mounted on the clamping position of the machining equipment (such as the chuck of the machining equipment) are also different; for example, when machining the outer end face of the flange, the loading fixture needs to be clamped on the outer periphery of the flange section to insert the shaft section of the inner ring of the wheel hub bearing into the chuck of the machining equipment; and when machining the shaft section of the wheel hub bearing, the loading fixture needs to be clamped at The outer circumference of the shaft segment is used to insert the flange segment of the hub bearing into the chuck of the machining equipment; because the outer circumference of the flange segment is much larger than the outer circumference of the shaft segment, in the current situation where different parts of the inner ring of the hub bearing are machined separately, in order to ensure that each process can quickly load the workpiece (for example, if the loading fixture for clamping the flange segment is to be used for clamping the shaft segment, the clamping jaws need to have a long moving stroke, which is bound to take up time, and is not conducive to rapid loading and speeding up production), the current loading fixture for clamping the flange segment is different from the loading fixture for clamping the shaft segment. Such a fixture cannot be unified, which makes the management cost of the loading fixture higher and the versatility of the loading fixture is low. Utility Model Content

[0005] The utility model aims to provide a feeding fixture for processing a hub bearing, so as to solve the problems in the prior art that the feeding fixtures required for processing a small inner ring of a hub bearing cannot be unified, resulting in high fixture management costs and low versatility of the feeding fixtures.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A loading fixture for wheel hub bearing processing includes a plurality of clamping jaws that can approach or move away from each other, the plurality of clamping jaws are located on the same circumference, each clamping jaw is provided with clamping fingers, the clamping fingers include near clamping fingers and far clamping fingers, the distance between the near clamping fingers and the center of the circumference is smaller than the distance between the far clamping fingers and the center of the circumference, and there is a spacing between the near clamping fingers and the far clamping fingers in the projection direction of the center line of the circumference.

[0008] The principle and advantage of this scheme are: through the structural setting of the near clamping fingers and the far clamping fingers with a spacing in the center line projection direction, when the shaft segment needs to be processed (the chuck of the processing equipment needs to clamp the flange segment of the workpiece), the multiple near clamping fingers on the clamping jaws are used to clamp and load the shaft segment of the hub bearing, and when the outer periphery of the flange segment of the hub bearing needs to be processed (the chuck of the processing equipment needs to clamp the shaft segment of the workpiece), the multiple far clamping fingers with a longer distance are used to clamp and load the flange segment of the hub bearing. Because the distances between the near clamping fingers and the far clamping fingers and the center of the circle are different, it can be ensured that whether it is the flange segment or the shaft segment of the workpiece, it can be achieved on the basis of a short moving stroke of the clamping jaws, thereby ensuring the loading speed of the loading fixture, and making the same loading fixture can be used for clamping both the flange segment and the shaft segment, realizing the unification of the loading fixture when processing the inner ring of the hub bearing (that is, the generalization of the loading fixture), which helps to reduce the management cost of the loading fixture and improve the practicality of the loading fixture.

[0009] In addition, since the loading fixture can be used for clamping both the shaft section and the flange section of the hub bearing, one loading fixture can be used for different processing steps of the hub bearing, which helps to use the same loading fixture for loading in two or more adjacent steps, greatly reducing equipment costs.

[0010] Preferably, as an improvement, the near clamping finger and the far clamping finger can be detachably connected to the clamping jaw to reduce maintenance costs.

[0011] Preferably, as an improvement, the distance between the distal clamping finger and the proximal clamping finger can be adjusted to meet the clamping requirements of hub bearings with different shaft segment length specifications.

[0012] Preferably, as an improvement, the clamping jaw is provided with a plurality of mounting holes, the center line of the plurality of mounting holes is parallel to the center line of the circumference, and each mounting hole can be used to fix the distal clamping finger; by selecting different mounting holes, the distal clamping finger can be installed in different positions, thereby adapting to the clamping requirements of wheel hub bearings of different specifications.

[0013] Preferably, as an improvement, the proximal clamping finger is threadedly connected to the clamping jaw, and the axial direction of the thread of the proximal clamping finger coincides with the radial direction of the circumference, so that the distance between the proximal clamping finger and the center of the circumference can be adjusted, thereby being suitable for clamping shaft segments of hub bearings of more specifications.

[0014] Preferably, as an improvement, a thimble is also installed on the clamping jaw, and the end of the thimble is located between the distal clamping finger and the proximal clamping finger, and the thimble is used to push the flange end face of the hub bearing; the thimble of this scheme can push the workpiece into a set position through the thimble after the workpiece is inserted into the chuck of the machining equipment, and there are multiple thimbles at the same time, and the top ends of the multiple thimbles can be located in the same plane, so that the position of the tilted workpiece is corrected in a multi-point surface manner, thereby achieving accurate placement of the workpiece on the chuck.

[0015] Preferably, as an improvement, the ejector pin is detachably connected to the clamping jaw, so that the ejector pin can be easily replaced after being worn.

[0016] Preferably, as an improvement, an elastic body is provided between the ejector pin and the clamping jaw. The ejector pin of the present solution is provided with an elastic body, so that when the ejector pin pushes the workpiece to be fed into the machining chuck, on the one hand, the collision force when the clamp and the workpiece collide with each other can be reduced; on the other hand, even if the surface flatness of the workpiece before machining is poor, the elastic bodies on the ejector pins can be used to ensure that the workpiece is pushed into place and accurately placed on the chuck.

[0017] Preferably, as an improvement, it also includes a pushing frame installed on the driver of the clamp, the pushing frame is slidably connected to the housing of the driver along the direction of the circumferential center line, an elastic member is connected between the pushing frame and the driver, the near clamping finger is located between the pushing frame and the far clamping finger, and the pushing frame is used to abut against the end face of the shaft section of the hub bearing.

[0018] Beneficial effect: The setting of the movable pushing frame of the present invention enables the loading fixture to insert the workpiece into the machined chuck by clamping the shaft segment, release the clamping of the workpiece by the near clamping fingers, and then control the loading fixture to approach the chuck, so that the pushing frame located at the rear end of the near clamping fingers abuts against the end face of the shaft segment of the workpiece, thereby pushing the workpiece to move through the pushing frame to ensure that the workpiece can be inserted into place on the chuck. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the utility model.

[0020] Figure 2 for Figure 1 Left view of .

[0021] Figure 3 for Figure 1 main view.

[0022] Figure 4 The longitudinal section view shows the ejector pin structure according to the embodiment of the utility model.

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure after the near clamping fingers clamp the shaft section of the hub bearing in the embodiment of the utility model.

[0024] Figure 6 It is a schematic diagram of the three-dimensional structure after the distal clamping fingers are used to clamp the flange section of the hub bearing in an embodiment of the utility model. DETAILED DESCRIPTION

[0025] The following is further described in detail through specific implementation methods:

[0026] The reference numerals in the drawings of the specification include: clamping jaw 1, driver 2, proximal clamping finger 11, distal clamping finger 12, ejector pin 13, needle head 131, needle sleeve 132, elastic body 133, pushing frame 3, pushing rod 31, elastic member 4.

[0027] Example

[0028] Combination Figures 1 to 6 A loading fixture for wheel hub bearing processing is used to stably clamp the wheel hub bearing to facilitate subsequent processing operations on the wheel hub bearing.

[0029] The loading clamp includes a plurality of jaws 1, which are always located on the same circle and are evenly distributed about the circumference. The plurality of jaws 1 are connected to the same driver 2, and the driver 2 is used to drive the plurality of jaws 1 to synchronously approach each other or synchronously move away from each other. In this embodiment, the number of the jaws 1 is three, and the driver 2 and the jaws 1 constitute a jaw 1 cylinder.

[0030] Each clamping jaw 1 is equipped with a near clamping finger 11, a far clamping finger 12 and a pin 13. The distance between the near clamping finger 11 and the center of the circle is smaller than the distance between the far clamping finger 12 and the center of the circle. This design allows the near clamping finger 11 to clamp the shaft section of the hub bearing, while the far clamping finger 12 is used to clamp the flange section of the hub bearing.

[0031] The distal clamping finger 12 can also be adjusted in the axial position along the circumferential center axis on the clamping jaw 1. In order to achieve this function, the clamping jaw 1 is provided with a plurality of mounting holes, which are arranged in the axial direction, and each mounting hole can be used to fix and install the distal clamping finger 12. In this way, by selecting different mounting holes to install the distal clamping finger 12, the axial position of the distal clamping finger 12 on the clamping jaw 1 can be adjusted to adapt to wheel hub bearings of different sizes.

[0032] The connection between the near clamping finger 11 and the clamping jaw 1 is threaded, and the axial direction of the thread of the near clamping finger 11 coincides with the radial direction of the circumference. This connection method allows the near clamping finger 11 to be fine-tuned in the radial direction of the circumference to better adapt to the shaft segment size of the hub bearing. The near clamping finger 11 specifically includes a threaded segment and a clamping head fixed into one body, the clamping head is used to clamp the workpiece, a nut is threadedly connected to the threaded segment, and the threaded segment is threadedly connected to the clamping jaw 1. When the length of the near clamping finger 11 extending out of the clamping jaw 1 is adjusted, the nut is used to move toward the clamping jaw 1 to tighten the near clamping finger 11.

[0033] There is a distance between the near clamping finger 11 and the far clamping finger 12 in the projection direction of the center line of the circumference, and the end of the ejector pin 13 is located between the far clamping finger 12 and the near clamping finger 11. The ejector pin 13 is used to push the flange surface of the workpiece. An elastic body 133 is provided between the ejector pin 13 and the clamping jaw 1. The deformation direction of the elastic body 133 is parallel to the center line of the circumference. The elastic body 133 is like a spring, which can compensate for the surface size error on the wheel hub bearing blank to a certain extent, and ensure that the workpiece can be stably pushed into the chuck of the machining equipment. The ejector pin 13 is also designed as a detachable structure for easy replacement and maintenance; specifically, the ejector pin 13 includes a needle head 131 and a needle sleeve 132, the needle head 131 is slidably connected to the needle sleeve 132, the needle head 131 is used to push the workpiece, and the needle head 131 extends out of the needle sleeve 132, an elastic body 133 is installed in the needle tube, the elastic body 133 can be a spring, one end of the elastic body 133 is pressed against one end of the needle head 131 that penetrates into the needle sleeve 132, and the other end of the elastic body 133 is pressed tightly against the clamping jaw 1, and the needle sleeve 132 is fixed on the clamping jaw 1.

[0034] In addition, a push frame 3 is slidably connected to the housing of the driver 2, and the push frame 3 is slidably connected to the housing of the driver 2 along the circumferential centerline direction. An elastic member 4 is connected between the push frame 3 and the driver 2, and the elastic member 4 is a spring. The near clamping finger 11 is located between the push frame 3 and the far clamping finger 12. After the clamp initially feeds the hub bearing (workpiece) to the chuck of the processing equipment, the clamp is controlled to approach the chuck, so that the push frame 3 pushes the end face of the shaft section of the hub bearing to move, so that the hub bearing can be placed in place on the chuck. The design of the elastic member 4 can provide a certain buffering effect during the clamping process to avoid damage to the hub bearing.

[0035] Specifically, the pushing frame 3 includes an integrally formed pushing center and three pushing rods 31 evenly distributed along the circumference of the pushing center. The pushing center is opposite to the center of the circle enclosed by the multiple clamps 1. The pushing rod 31 slides on the housing of the driver 2 along the center line of the circle. An elastic member 4 is arranged between the pushing rod 31 and the housing of the driver 2.

[0036] When this embodiment is in use, when it is necessary to clamp the flange section of the hub bearing for loading, the three distal clamping fingers 12 on the clamping jaw 1 are used to clamp the outer periphery of the flange section of the workpiece (i.e., the hub bearing), and then the clamp is controlled to approach the chuck, and the shaft section of the workpiece is inserted into the chuck. Because the inserted workpiece cannot be completely inserted into place at one time, after loosening the distal clamping fingers 12, the clamp is controlled to move closer to the chuck, so that the elastic ejector pin 13 can be pushed against the flange surface of the workpiece, thereby achieving complete insertion of the workpiece on the chuck and ensuring that the workpiece is stably and accurately placed on the chuck.

[0037] When it is necessary to clamp the shaft section of the hub bearing for loading, the three near-clamping fingers 11 on the clamping jaw 1 are used to clamp the outer periphery of the shaft section of the workpiece (i.e., the hub bearing), and then the clamp is controlled to approach the chuck, and the flange section of the workpiece is inserted into the chuck. Because the inserted workpiece cannot be completely inserted into place at one time, after releasing the near-clamping fingers 11, the clamp is controlled to move closer to the chuck, so that the elastic pushing frame 3 can push against the end face of the shaft section of the workpiece, thereby achieving complete insertion of the workpiece on the chuck and ensuring that the workpiece is stably and accurately placed on the chuck.

[0038] The loading fixture of this embodiment has a double-layer clamping structure (far clamping finger 12 and near clamping finger 11), so that clamping and loading of the same hub bearing in different directions can be achieved with one fixture, realizing the unification and generalization of the fixture, helping to reduce the management cost and difficulty of the fixture, and improving the practicality of the fixture.

[0039] In addition, the arrangement of the elastic ejector pin 13 and the elastic push frame 3 of the clamp in this embodiment enables the clamp to adjust the position of the tool inserted into the chuck of the processing equipment, ensuring that the workpiece can be placed on the chuck stably and accurately, which helps to achieve dimensional consistency during machining, thereby ensuring the processing quality.

[0040] In addition, the loading fixture of this embodiment can be used for clamping both the shaft section of the hub bearing and the flange section of the hub bearing, so that one loading fixture can be used for different processing steps of the hub bearing, which helps to use the same loading fixture for loading in two or more adjacent steps, greatly reducing equipment costs.

[0041] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A loading fixture for wheel hub bearing processing, comprising a plurality of jaws that can move closer to or farther from each other, the plurality of jaws being located on the same circumference, each jaw being provided with a clamping finger, characterized in that: The clamping fingers include near clamping fingers and far clamping fingers. The distance between the near clamping fingers and the center of the circle is smaller than the distance between the far clamping fingers and the center of the circle. There is a distance between the near clamping fingers and the far clamping fingers in the projection direction of the center line of the circle.

2. A wheel hub bearing processing loading fixture according to claim 1, characterized in that: The near clamping finger and the far clamping finger can be detachably connected to the clamping claw.

3. A wheel hub bearing processing loading fixture according to claim 2, characterized in that: The distance between the distal clamping fingers and the proximal clamping fingers can be adjusted.

4. A wheel hub bearing processing loading fixture according to claim 3, characterized in that: The clamping jaw is provided with a plurality of mounting holes, the center line of the plurality of mounting holes is parallel to the center line of the circumference, and each mounting hole can be used for fixing and mounting the distal clamping finger.

5. The wheel hub bearing processing loading fixture according to claim 2, characterized in that: The proximal clamping finger is threadedly connected to the clamping jaw, and the axial direction of the thread of the proximal clamping finger coincides with the circumferential radial direction.

6. The wheel hub bearing processing loading fixture according to claim 1, characterized in that: The clamping jaw is also provided with an ejector pin, and the end of the ejector pin is located between the distal clamping finger and the proximal clamping finger.

7. A loading fixture for wheel hub bearing processing according to claim 6, characterized in that: The ejector pin is detachably connected to the clamping jaw.

8. The wheel hub bearing processing loading fixture according to claim 6, characterized in that: An elastic body is arranged between the ejector pin and the clamping claw.

9. A loading fixture for wheel hub bearing processing according to any one of claims 1 to 8, characterized in that: It also includes a push frame installed on the driver of the clamping claw, the push frame is slidably connected to the housing of the driver along the circumferential center line direction, an elastic member is connected between the push frame and the driver, and the near clamping finger is located between the push frame and the far clamping finger.

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