CN219746340U - Clamp for machining needle bearing retainer - Google Patents

Abstract

The utility model discloses a clamp for processing a needle bearing retainer, which comprises a base (1), wherein one side of the base (1) is connected with a clamping part (2), the other side of the base is connected with a fixed shaft, the fixed shaft (3) comprises a cylindrical section (31) connected with the base (1), the cylindrical section (31) is externally connected with a conical column section, a plurality of clamping blocks (4) are arranged in the circumferential direction of the conical column section (32), the outer side surfaces of the clamping blocks (4) are mutually matched to form a clamping surface (41), the inner side surfaces of the clamping blocks (4) are respectively connected with the conical column section through conical surface lamination, and the size of the clamping surface (41) is adjusted by adjusting the axial positions of the clamping blocks (4) on the conical column section (32). The needle bearing retainer clamping device can clamp needle bearing retainers with various sizes, is convenient to process on a lathe, has high applicability, and can obtain good processing precision.

Description

Clamp for machining needle bearing retainer

Technical Field

The utility model relates to the technical field of bearing machining, in particular to a clamp for machining a needle bearing retainer.

Background

At present, in the stamping processing of motor iron cores, the application of rotary dies is more and more, wherein the processing precision of a needle bearing retainer is a very important ring for the precision of the rotary dies, and the dimensional precision of the needle bearing retainer is directly related to the torsion rotary precision. Along with the increasing requirements of home appliances and new energy motor iron core dies on product sizes, the machining precision requirements of needle bearing retainers are also increasing.

In the whole processing process of the existing needle bearing retainer, when the needle bearing retainer needs to be processed on a lathe, particularly the processing of an outer cylindrical surface, the whole length of the needle bearing retainer is generally lengthened, the lengthened part is used as a process chuck to be clamped on a three-jaw chuck of the lathe, the processing precision of the process chuck for clamping the outer cylindrical surface of the needle bearing retainer is not as expected, and the reason that the processing precision is not as expected is that when the three-jaw chuck clamps the process chuck of the needle bearing retainer, the outer cylindrical surface of the needle bearing retainer is difficult to ensure to be coaxial with a main shaft of the lathe.

Although there are also clamps dedicated to needle bearing holders on the market, which can clamp the needle bearing holders from inside to outside, and act on the inner cylindrical surface of the needle bearing holder, refer to patent CN 212019425U, a clamp for processing the holders, but this dedicated clamp is compared with direct clamping by a three-jaw chuck of a lathe, according to the description in the specification, when processing holders of different sizes, it is necessary to first select a product reference tube mounting post having the same outer diameter as the inner diameter of the holder to be processed, and then clamp the holder, so that product reference tube mounting posts of various sizes are required to be provided, the use convenience of the clamp is poor, and in addition, frequent dismounting of the product reference tube mounting post must affect the processing accuracy of the needle bearing holder.

Therefore, there is a need to develop a new fixture structure for needle bearing cage machining to solve the drawbacks of the existing needle bearing cage fixtures.

Disclosure of Invention

The utility model aims to provide a clamp for machining a needle bearing retainer. The needle bearing retainer clamping device can clamp needle bearing retainers with various sizes so as to facilitate the machining of the needle bearing retainers on a lathe, has strong applicability, and can obtain better machining precision.

The technical scheme of the utility model is as follows: a fixture for processing a needle bearing retainer comprises a base, wherein one side of the base is connected with a clamping part, the other side of the base is connected with a fixed shaft, the fixed shaft comprises a cylindrical section connected with the base, the cylindrical section is externally connected with a conical column section, a plurality of clamping blocks are arranged in the circumference of the conical column section, the outer side faces of the clamping blocks are mutually matched to form a clamping face, the inner side faces of the clamping blocks are connected with the conical column section through conical surface fit, and the size of the clamping face is adjusted by adjusting the axial position of the clamping blocks in the conical column section.

Compared with the prior art, the utility model has the beneficial effects that: the utility model designs a fixing shaft composed of a cylindrical section and a conical column section, wherein a plurality of clamping blocks are arranged on the periphery of the conical column section to form a clamping surface for clamping a needle bearing retainer to be processed. In addition, the position of the clamping blocks is adjusted along the axial direction of the conical column section, frequent disassembly and assembly of parts are not involved, the fixed shaft is always coaxial with the main shaft of the lathe, and the machining precision of the needle bearing retainer can be improved to a certain extent.

In the fixture for machining the needle bearing retainer, the base is connected with a plurality of fixing rods, each fixing rod penetrates through one clamping block, and the size of an included angle formed by the fixing rod and the central axis of the fixing shaft is equal to that of an included angle formed by an outer conical surface bus of the conical column section and the central axis of the fixing shaft.

In the fixture for machining the needle bearing retainer, the clamping blocks comprise a base part, a plurality of sector blocks with gradually reduced sizes are stacked on the outer side of the base part, and the sector blocks with equal sizes on the plurality of clamping blocks are mutually matched to form a clamping surface.

In the fixture for machining the needle bearing retainer, the clamping blocks are mutually matched to form a plurality of clamping surfaces with different sizes, and annular step surfaces perpendicular to the two clamping surfaces are arranged between two adjacent clamping surfaces.

In the fixture for machining the needle bearing retainer, the periphery of the clamping blocks is provided with the tightening sleeves, the setting positions of the tightening sleeves correspond to the outer side faces of the base parts of the clamping blocks, and the outer side faces of the base parts are provided with grooves for embedding the tightening sleeves.

In the fixture for machining the needle bearing retainer, the tightening sleeve comprises a pair of semicircular stirrups, the pair of stirrups are fixedly connected through bolts and nuts, and anti-slip washers are arranged on the inner sides of the pair of stirrups.

In the fixture for machining the needle bearing retainer, a backing plate is arranged on the inner sides of the clamping blocks, a first locking block connected with the cylindrical section is arranged on the inner sides of the backing plate, and a second locking block connected with the conical column section is arranged on the outer sides of the clamping blocks.

In the fixture for machining the needle bearing retainer, the center of the backing plate is provided with a through threaded hole; along the axial direction of the fixed shaft, one part of the threaded hole coincides with the cylindrical section and is connected with the cylindrical section through the matching of internal threads and external threads; the other part of the threaded hole coincides with the conical column section, and a gap is reserved between the threaded hole and the conical column section.

In the fixture for machining the needle bearing retainer, the position, corresponding to the fixing rod, on the base plate is provided with the avoidance hole, the fixing rod penetrates through the base plate from the avoidance hole, the aperture of the avoidance hole is R, the rod diameter of the fixing rod is R, and R is more than or equal to 1.5R.

In the fixture for machining the needle bearing retainer, the outer side end of the fixing rod is flush with the outer side end of the conical column section.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the arrangement of four clamp blocks in a tapered column Duan Zhouxiang;

FIG. 3 is an enlarged view of a portion of FIG. 1 at A;

fig. 4 is a schematic structural view of the tight sleeve.

Reference numerals: the needle bearing retainer comprises a 1-base, a 2-clamping part, a 3-fixed shaft, a 4-clamping block, a 5-fixed rod, a 6-tightening sleeve, a 7-backing plate, an 8-first locking block, a 9-second locking block, a 10-gap, a 31-cylindrical section, a 32-conical column section, a 41-clamping surface, a 42-base part, a 43-sector block, a 44-annular step surface, 61-stirrups, 62-bolts, 63-nuts, 64-anti-slip washers, 71-avoidance holes and 100-to-be-processed needle bearing retainers.

Detailed Description

The utility model is further illustrated by the following figures and examples, which are not intended to be limiting.

Examples: a anchor clamps for processing of bearing holder, the structure is as shown in fig. 1 through 4, including base 1, one side of base 1 is connected with clamping part 2, and the opposite side is connected with fixed axle 3, and fixed axle 3 includes the cylinder section 31 of being connected with base 1, and cylinder section 31 outwards is connected with awl post section 32, is equipped with four clamp splice 4 in the circumference of awl post section 32, and the lateral surface of four clamp splice 4 mutually support and form clamping face 41, all is connected through the conical surface laminating between the medial surface of four clamp splice 4 and awl post section 32, realizes the regulation of clamping face 41 size through synchronous adjustment four clamp splice 4 in the epaxial position of awl post section 32.

It should be noted that, for the processing of needle bearing retainers with different sizes, since the four clamping blocks 4 need to be adjusted in position along the axial direction of the tapered column section 32, the cross-sectional shape of the finally formed clamping surface 41 is not a complete circle, but is a shape which is relatively close to the complete circle and is approximately circular, so after the clamping of the needle bearing retainer is completed, the finally formed clamping surface 41 is not completely attached to the inner cylindrical surface of the needle bearing retainer, but does not prevent the clamping of the needle bearing retainer.

Preferably, four fixing rods 5 are connected to the base 1, each fixing rod 5 penetrates through one clamping block 4, and two fixing rods 5 are arranged to fix the clamping blocks 4 one by one, namely, to play a limiting role, so that the clamping blocks 4 are prevented from falling off; secondly, when the clamping block 4 axially adjusts the position along the conical column section 32, the fixing rod 5 can conduct guiding on the clamping block, so that the clamping block can cooperatively guide with the outer conical surface of the conical column section 32, and the position adjusting precision is high.

Preferably, the included angle between the fixing rod 5 and the central axis of the fixing shaft 3 is equal to the included angle between the outer conical surface generatrix of the conical column section 32 and the central axis of the fixing shaft 3, so that the fixing rod 5 and the outer conical surface of the conical column section 32 can be cooperatively guided, and the clamping condition can not occur.

Preferably, the clamping block 4 includes a base portion 42, a plurality of segments 43 with gradually reduced sizes are laminated on the outer side of the base portion 42, and the segments 43 with equal sizes on the four clamping blocks 4 are mutually matched to form a clamping surface 41, that is, each clamping surface 41 is formed by outer arc surfaces of the four segments 43, so that the shape of the clamping surface 41 can be relatively close to a cylindrical surface, and a good clamping effect is achieved.

Preferably, the four clamping blocks 4 are mutually matched to form a plurality of clamping surfaces 41 with different sizes, the clamping surfaces 41 can be matched with needle bearing retainers with different sizes, when the needle bearing retainer is clamped on the needle bearing retainer, the clamping surfaces 41 smaller than the inner cylindrical surface of the needle bearing retainer by one number can be selected, and at the moment, the positions of the four clamping blocks 4 in the axial direction of the conical column section 32 are adjusted, so that the clamping surfaces 41 enlarge and clamp the inner cylindrical surface of the needle bearing retainer.

Preferably, an annular step surface 44 perpendicular to the two clamping surfaces 41 is arranged between the two adjacent clamping surfaces 41, and after the clamping surface 41 smaller than the inner cylindrical surface of the needle bearing retainer by one number is selected, the annular step surface 44 between the two clamping surfaces 41 can play a role in limiting and supporting the needle bearing retainer.

Preferably, a tightening sleeve 6 is arranged on the periphery of the four clamping blocks 4, the arrangement position of the tightening sleeve 6 corresponds to the outer side face of the base part 42 on the clamping blocks 4, a groove for embedding the tightening sleeve 6 is formed in the outer side face of the base part 42, and when the four clamping blocks 4 are axially adjusted to the final position in the conical column section 32, namely, after the four clamping blocks 4 can firmly clamp the needle bearing retainer, the four clamping blocks 4 are tightly hooped by the tightening sleeve 6, so that the four clamping blocks 4 are fastened into a whole.

Preferably, the tightening sleeve 6 comprises a pair of semicircular hoops 61, the pair of hoops 61 are fixedly connected through bolts 62 and nuts 63, and along with the adjustment of the axial positions of the four clamping blocks 4 in the tapered column section 32, the tightening sleeve 6 can also be adjusted in size to adapt to the position adjustment of the four clamping blocks 4.

Preferably, the anti-slip washers 64 are arranged on the inner sides of the pair of stirrups 61, the anti-slip washers 64 can effectively improve the fastening effect of the tightening sleeve 6, and the anti-slip washers 64 are made of elastic materials and are formed by two circular arc-shaped monomers, so that the tightening sleeve is convenient to assemble.

Preferably, the inner side of the four clamping blocks 4 is provided with a base plate 7, the base plate 7 is used for enabling the four clamping blocks 4 to be adjusted synchronously when the axial position of the tapered column section 32 is adjusted, the inner side of the base plate 7 is provided with a first locking block 8 connected with the cylindrical section 31, the outer sides of the plurality of clamping blocks 4 are provided with a second locking block 9 connected with the tapered column section 32, the first locking block 8 and the second locking block 9 are similar to the tight sleeve 6, when the four clamping blocks 4 are axially adjusted to the final position at the tapered column section 32, the first locking block 8 and the second locking block 9 are matched and locked with the two ends of the four clamping blocks 4, the fastening effect of the four clamping blocks 4 is improved, and loosening of the inner part of a die is avoided in the processing process of the needle bearing retainer.

The first locking blocks 8 are installed from the outer sides of the conical column sections 32 after the positions of the four clamping blocks 4 are adjusted in place, the second locking blocks 9 are pre-installed at the tail ends of the cylindrical sections 31 and can be attached to the base 1, and when the positions of the four clamping blocks 4 are adjusted in place, the second locking blocks 9 are outwards screwed out to abut against the base plate 7.

Preferably, the center of the backing plate 7 is provided with a through threaded hole; along the axial direction of the fixed shaft 3, one part of the threaded hole is overlapped with the cylindrical section 31 and is connected with the cylindrical section 31 through the matching of internal threads and external threads; the other part of the threaded hole coincides with the conical column section 32, and a gap 10 is reserved between the threaded hole and the conical column section 32, and as the inner side surface of the base 1 certainly exceeds the cylindrical section 31, in order to realize the support of the backing plate 7 on the four clamping blocks 4, one part of the threaded hole coincides with the cylindrical section 31, and the other part coincides with the conical column section 32.

Based on the utility model, the clamping surfaces 41 with different sizes are provided, the position adjustment quantity of the four clamping blocks 4 in the axial direction of the conical column section 32 is small, so that the threaded holes can always ensure that one part of the threaded holes are coincident with the cylindrical section 31, the other part of the threaded holes are coincident with the conical column section 32, namely the depth of the threaded holes is not required to be too deep, and the thickness of the backing plate 7 is not required to be too thick.

Preferably, the backing plate 7 is provided with a avoiding hole 71 corresponding to the fixing rod 5, and the fixing rod 5 passes through the backing plate 7 from the avoiding hole 71, and the backing plate 7 needs to axially move along with the four clamping blocks 4, and the backing plate 7 is a whole, so that the avoiding hole 71 needs to be arranged to avoid the fixing rod 5.

Preferably, the hole diameter of the avoidance hole 71 is R, the rod diameter of the fixing rod 5 is R, r=2r, and under the limitation of the size, the avoidance hole 71 can avoid the fixing rod 5, and simultaneously, the backing plate 7 and the four clamping blocks 4 are ensured to have larger position adjustment amounts in the axial direction.

Preferably, the outer end of the securing lever 5 is flush with the outer end of the tapered post section 32.

The usage rules of the utility model are as follows: the four clamping blocks 4 have an initial position, the length of the tapered column sections 32 reserved on the inner side and the outer side of the four clamping blocks 4 is limited to be equal to the initial position of the four clamping blocks 4, and the four clamping blocks 4 need to be adjusted to the initial position after each use.

When the needle bearing retainer 100 is used, the needle bearing retainer 100 to be processed is clamped on the four clamping blocks 4, and the specific steps are as follows: according to the size of the needle bearing retainer 100 to be processed, a clamping surface 41 smaller than the inner cylindrical surface of the needle bearing retainer 100 to be processed is selected, so that the needle bearing retainer 100 to be processed is propped against an annular step surface 44 perpendicular to the clamping surface 41, at the moment, the positions of four clamping blocks 4 in the axial direction of the conical column section 32 are adjusted, the selected clamping surface 41 is enlarged to clamp the inner cylindrical surface of the needle bearing retainer 100 to be processed, the tightness of connection between the enlarged clamping surface 41 and the inner cylindrical surface of the needle bearing retainer 100 to be processed is required to be ensured, then the four clamping blocks 4 are tightly clamped by a clamping sleeve 6, the four clamping blocks 4 are tightly fastened into a whole, and two ends of the four clamping blocks 4 are tightly locked by the first locking block 8 and the second locking block 9 in a matched mode; finally, the present utility model after clamping the needle bearing holder 100 to be machined is clamped to a lathe, specifically, the clamping part 2 of the present utility model is clamped by a three-jaw chuck of the lathe.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

The above is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above examples, and all technical solutions belonging to the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that modifications and adaptations to the present utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims (10)

1. A anchor clamps for processing of bearing holder, its characterized in that: including base (1), one side of base (1) is connected with clamping part (2), and the opposite side is connected with fixed axle (3), fixed axle (3) include cylinder section (31) be connected with base (1), and cylinder section (31) are outwards connected with awl post section (32), are equipped with a plurality of clamp splice (4) in the circumference of awl post section (32), and the lateral surface of a plurality of clamp splice (4) mutually support and form clamping face (41), all are connected through the conical surface laminating between the medial surface of a plurality of clamp splice (4) and awl post section (32), realize the regulation of clamping face (41) size through adjusting the position of a plurality of clamp splice (4) in awl post section (32) axial direction.

2. A jig for needle bearing cage machining according to claim 1, wherein: the base (1) is connected with a plurality of fixing rods (5), each fixing rod (5) penetrates through one clamping block (4), and the size of an included angle formed by the fixing rods (5) and the central axis of the fixed shaft (3) is equal to that of an included angle formed by an outer conical surface bus of the conical column section (32) and the central axis of the fixed shaft (3).

3. A jig for needle bearing cage machining according to claim 1, wherein: the clamping block (4) comprises a base part (42), a plurality of sector blocks (43) with gradually reduced sizes are laminated on the outer side of the base part (42), and the sector blocks (43) with equal sizes on the clamping block (4) are mutually matched to form a clamping surface (41).

4. A jig for needle bearing cage machining according to claim 3, wherein: the clamping blocks (4) are mutually matched to form a plurality of clamping surfaces (41) with different sizes, and annular step surfaces (44) perpendicular to the two clamping surfaces (41) are arranged between two adjacent clamping surfaces (41).

5. A jig for needle bearing cage machining according to claim 3, wherein: the periphery of a plurality of clamp blocks (4) is provided with a tightening sleeve (6), the setting position of the tightening sleeve (6) corresponds to the outer side face of the base part (42) on the clamp blocks (4), and the outer side face of the base part (42) is provided with a groove for embedding the tightening sleeve (6).

6. A jig for needle bearing cage machining according to claim 5, wherein: the tightening sleeve (6) comprises a pair of semicircular stirrups (61), the pair of stirrups (61) are fixedly connected through bolts (62) and nuts (63), and anti-slip washers (64) are arranged on the inner sides of the pair of stirrups (61).

7. A jig for needle bearing cage machining according to claim 2, wherein: the inner sides of the clamping blocks (4) are provided with a base plate (7), the inner sides of the base plate (7) are provided with first locking blocks (8) connected with the cylindrical sections (31), and the outer sides of the clamping blocks (4) are provided with second locking blocks (9) connected with the conical column sections (32).

8. A fixture for needle bearing cage tooling as defined in claim 7 wherein: the center of the backing plate (7) is provided with a through threaded hole; along the axial direction of the fixed shaft (3), one part of the threaded hole is overlapped with the cylindrical section (31) and is connected with the cylindrical section (31) through the matching of internal threads and external threads; the other part of the threaded hole is overlapped with the conical column section (32), and a gap (10) is reserved between the threaded hole and the conical column section (32).

9. A fixture for needle bearing cage tooling as defined in claim 7 wherein: the position of the backing plate (7) corresponding to the fixing rod (5) is provided with an avoidance hole (71), the fixing rod (5) passes through the backing plate (7) from the avoidance hole (71), the aperture of the avoidance hole (71) is R, the rod diameter of the fixing rod (5) is R, and R is more than or equal to 1.5R.

10. A jig for needle bearing cage machining according to claim 2, wherein: the outer side end of the fixing rod (5) is flush with the outer side end of the conical column section (32).