Simple hub press-fitting clamp

Abstract

The utility model discloses a simple hub press-fitting clamp which comprises a guide cylinder, a taper press-fitting cylinder, a thrust cylinder assembly and a driving assembly. The right portion of the guide cylinder is provided with an internal thread used for being connected with an external thread of an axle shaft sleeve, and the outer portion of the guide cylinder is provided with a guide outer wall. A guide hole is formed in the taper press-fitting cylinder, the guide hole is arranged outside the guide outer wall in a sleeving mode, and a taper boss used for being matched with a bearing taper hole of a hub assembly in an abutting mode is arranged outside the taper press-fitting cylinder. The thrust cylinder assembly is detachably connected with the guide cylinder, the left side of the driving assembly is connected with the thrust cylinder assembly, the right side of the driving assembly abuts against the taper boss, and the driving assembly can apply rightward pressure to the taper boss. The clamp is easy to operate, simple in structure, low in cost, small in size, suitable for being carried by a driver on a vehicle and suitable for being equipped in a small maintenance site.

Description

TECHNICAL FIELD

[0001] The utility model relates to an automobile part assembly fixture, concretely relates to a simple hub press -fit fixture. BACKGROUND

[0002] Under the current nationwide heavy-duty axle product market vigorous development situation, the competition between domestic heavy-duty vehicle host factory and matching factory has reached the white-hot degree. As the key core component in the axle system, the assembly quality of the hub assembly is directly related to the safety and stability of the vehicle driving. In the traditional assembly process, a series of parts such as oil seal and bearing need to be accurately assembled to the half shaft sleeve of the axle, once the assembly deviation occurs, the vehicle is prone to oil leakage, abnormal sound and other faults in the driving process, which not only greatly reduces the reliability of the vehicle, but also seriously threatens the driving safety.

[0003] In the automobile production line or large-scale maintenance factory, the use of automatic press-fit fixture can efficiently and accurately realize hub press-fit. However, the transport vehicle using heavy-duty axle has high frequency of use and high working intensity, resulting in high frequency of maintenance. And its maintenance place has strong randomness, often needs the driver to maintain by himself, or to maintain in small maintenance shops near the transport route. These small maintenance places are limited by conditions such as site and fund, and it is difficult to equip large and high-priced automatic press-fit fixture. SUMMARY

[0004] Therefore, the utility model aims at providing a simple hub press-fit fixture, which is simple to operate, simple in structure, low in cost and small in size, suitable for drivers to carry with the vehicle and suitable for small maintenance places to equip.

[0005] The simple hub press-fit fixture in the utility model, which comprises a guide cylinder, a taper press-fit cylinder, a thrust cylinder assembly and a driving assembly, the right part of the guide cylinder is provided with an internal thread for connecting with the external thread of the half shaft sleeve, the outer part of the guide cylinder is provided with a guide outer wall, the inside of the taper press-fit cylinder is provided with a guide hole, the guide hole is sleeved on the guide outer wall, the outer part of the taper press-fit cylinder is provided with a taper boss for abutting and matching with the bearing taper hole of the hub assembly, the thrust cylinder assembly is detachably connected with the guide cylinder, the left side of the driving assembly is connected with the thrust cylinder assembly, the right side of the driving assembly abuts against the taper boss, and the driving assembly can apply a rightward pressure to the taper boss.

[0006] Further, the thrust cylinder assembly comprises a positioning cylinder and a positioning connecting rod connected with the positioning cylinder, the positioning cylinder is detachably connected with the left part of the guide cylinder, the driving assembly is arranged between the positioning connecting rod and the taper press-fit cylinder, and the left side of the driving assembly is connected with the positioning connecting rod.

[0007] Further, the driving assembly comprises a driving rod, an upper driving block, a lower driving block, a moving link, a first link, a second link, a third link, a fourth link and a pushing member, upper and lower portions of the driving rod are respectively provided with screw segments, the upper and lower driving blocks are connected with the screw segments of the upper and lower portions of the driving rod respectively; the fixed link, the first link, the upper driving block, the second link, the moving link, the third link, the lower driving block and the fourth link are sequentially connected and constitute an eight-link mechanism, by rotating the driving rod, the moving link can be made to approach or move away from the fixed link; the left end of the pushing member is connected with the moving link, and the right end of the pushing member abuts against the conical boss.

[0008] Further, the left end of the first link is hingedly connected with the upper end of the fixed link, and the right end of the first link is hingedly connected with the left end of the upper driving block; the left end of the second link is hingedly connected with the right end of the upper driving block, and the right end of the second link is hingedly connected with the upper end of the moving link; the right end of the third link is hingedly connected with the upper end of the moving link, and the left end of the third link is hingedly connected with the right end of the lower driving block; the right end of the fourth link is hingedly connected with the left end of the lower driving block, and the left end of the fourth link is hingedly connected with the lower end of the fixed link.

[0009] Further, the moving link and the fixed link are parallel to each other, and the upper driving block and the lower driving block are parallel to each other.

[0010] Further, a guide sliding groove penetrating in the up-down direction is formed in the barrel of the positioning cylinder, the moving link passes through the guide sliding groove and is fixedly connected with the barrel, and the moving link passes through the guide sliding groove and is in sliding fit with the guide sliding groove.

[0011] Further, the central axes of the conical press-fitting cylinder, the guide cylinder and the positioning cylinder coincide, and the pushing member comprises two push rods which are symmetrical to each other and whose symmetry axis is the central axis.

[0012] Further, the two push rods comprise a main rod body and an adjusting screw rod, the right portion of the main rod body is provided with an adjusting screw hole, the adjusting screw rod is in threaded connection with the adjusting screw hole, and the end face of the bolt head of the adjusting screw rod abuts against the conical boss.

[0013] Further, the right portion of the positioning cylinder is provided with a plurality of positioning pins, the left portion of the guide cylinder is provided with a positioning connecting structure corresponding to the position of each positioning pin, the positioning connecting structure comprises a guide groove and a positioning groove which are sequentially communicated, the guide groove is arranged on the inner wall of the guide cylinder in the axial direction of the guide cylinder, and the positioning groove is arranged on the inner wall of the guide cylinder in the circumferential direction of the guide cylinder.

[0014] Further, the plurality of positioning pins are uniformly arranged along the circumference of the positioning cylinder.

[0015] The utility model discloses the beneficial effect is:

[0016] (1) the utility model discloses simple operation, and the fixture structure is simple, and the cost is low, and the volume is small, is suitable for driver with vehicle carrying and is suitable for small -size maintenance field equipment.

[0017] (2) the utility model discloses the cooperation of guide hole and guide outer wall shaft hole, can guarantee the movement direction of the taper pressure -assembling cylinder accurate, thereby guaranteeing the assembly position of hub assembly accurate, guarantees the pressure -assembling assembly quality. DRAWINGS

[0018] In order to make the utility model's purpose, technical scheme and beneficial effect more clearly, the utility model provides the following drawings for explanation:

[0019] Figure 1 It is the structural schematic diagram of the utility model in use;

[0020] Figure 2 It is the sectional schematic view of the guide cylinder of the utility model;

[0021] Figure 3 It is the structural schematic diagram of the guide cylinder of the utility model;

[0022] Figure 4 It is the sectional schematic view of the taper pressure -assembling cylinder of the utility model;

[0023] Figure 5 It is the sectional schematic view of the push cylinder subassembly of the utility model;

[0024] Figure 6 It is the structural schematic diagram of hub assembly and half shaft sleeve pipe connection.

[0025] The marks in the drawings are as follows:

[0026] 1-guide cylinder, 101-internal thread, 102-guide outer wall, 103-guide slot, 104-positioning slot;

[0027] 2-taper pressure -assembling cylinder, 201-guide hole, 202-taper boss;

[0028] 3-push cylinder subassembly, 301-positioning cylinder, 302-constant connecting rod, 303-guide sliding slot, 304-positioning pin;

[0029] 4-Drive assembly, 401-Drive rod, 4011-Screw section, 4012-External hexagonal force application section, 402-Upper drive block, 403-Lower drive block, 404-Moving connecting rod, 405-First connecting rod, 406-Second connecting rod, 407-Third connecting rod, 408-Fourth connecting rod, 409-Push rod, 4091-Main rod body, 4092-Adjusting screw;

[0030] 5-Half-shaft sleeve, 501-External thread;

[0031] 6-Wheel hub assembly, 601-Bearing tapered bore. Detailed Implementation

[0032] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0033] like Figures 1-6 As shown, a simplified wheel hub press-fit fixture in this embodiment includes a guide cylinder 1, a tapered press-fit cylinder 2, a thrust cylinder assembly 3, and a drive assembly 4. The right side of the guide cylinder 1 is provided with an internal thread 101 for connecting with the external thread 501 of the half-shaft sleeve 5, and the outer side of the guide cylinder 1 is provided with a guide outer wall 102. The tapered press-fit cylinder 2 is provided with a guide hole 201 inside, and the guide hole 201 is sleeved on the guide outer wall 102. The outer side of the tapered press-fit cylinder 2 is provided with a tapered boss 202 for abutting and engaging with the bearing tapered hole 601 of the wheel hub assembly 6. The thrust cylinder assembly 3 is detachably connected to the guide cylinder 1. The left side of the drive assembly 4 is connected to the thrust cylinder assembly 3, and the right side of the drive assembly 4 abuts against the tapered boss 202. The drive assembly 4 can apply a rightward pressure to the tapered boss 202.

[0034] In use, the guide cylinder 1 is connected to the half-shaft sleeve 5 by the internal thread 101 and the external thread 501, and the thrust cylinder assembly 3 is detachably connected to the guide cylinder 1, so that the relative position of the thrust cylinder assembly 3 and the half-shaft sleeve 5 in the axial direction is fixed. This allows the left side of the drive assembly 4 to be connected to the thrust cylinder assembly 3. The drive assembly 4 can apply pressure to the right of the tapered boss 202 with the thrust cylinder assembly 3 as the support point. Since the tapered boss 202 abuts against the bearing tapered hole 601 of the wheel hub assembly 6, the wheel hub assembly 6 can be press-fitted onto the half-shaft sleeve 5. The operation is simple, the fixture structure is simple, the cost is low, and the size is small. It is suitable for drivers to carry in their vehicles and for small repair shops to equip.

[0035] During the press-fitting process, the guide hole 201 and the guide outer wall 102 shaft hole cooperate to ensure the accurate movement direction of the tapered press-fitting cylinder 2, thereby ensuring the accurate assembly position of the wheel hub assembly 6 and ensuring the press-fitting assembly quality.

[0036] In the embodiment, the thrust cylinder assembly 3 comprises a positioning cylinder 301 and a positioning connecting rod 302 connected with the positioning cylinder 301, the positioning cylinder 301 is detachably connected with the left part of the guide cylinder 1; the driving assembly 4 is arranged between the positioning connecting rod 302 and the tapered press-fit cylinder 2, and the left side of the driving assembly 4 is connected with the positioning connecting rod 302.

[0037] The relative position of the positioning connecting rod 302 and the half shaft sleeve 5 is fixed through the structures of the positioning cylinder 301, the guide cylinder 1 and the like, the total length of the driving assembly 4 is adjustable, and the distance between the positioning connecting rod 302 and the tapered press-fit cylinder 2 is increased by increasing the total length of the driving assembly 4, so that the right direction pressure can be applied to the tapered press-fit cylinder 2, and the hub assembly 6 is pressed and fitted on the half shaft sleeve 5.

[0038] In the embodiment, the driving assembly 4 comprises a driving rod 401, an upper driving block 402, a lower driving block 403, a moving connecting rod 404, a first connecting rod 405, a second connecting rod 406, a third connecting rod 407, a fourth connecting rod 408 and a pushing member, the upper part and the lower part of the driving rod 401 are respectively provided with screw segments 4011, the upper driving block 402 and the lower driving block 403 are respectively connected with the screw segments 4011 of the upper part and the lower part of the driving rod 401; the positioning connecting rod 302, the first connecting rod 405, the upper driving block 402, the second connecting rod 406, the moving connecting rod 404, the third connecting rod 407, the lower driving block 403 and the fourth connecting rod 408 are sequentially connected and constitute an eight-connecting-rod mechanism, by rotating the driving rod 401, the moving connecting rod 404 can be close to or away from the positioning connecting rod 302; the left end of the pushing member is connected with the moving connecting rod 404, and the right end of the pushing member abuts against the tapered boss 202. The end of the driving rod 401 is further provided with an outer hexagonal force applying segment 4012, so that the driving rod 401 can be rotated by a manual wrench, an electric wrench or other tools.

[0039] The eight-link mechanism is simple in structure. By rotating the driving rod 401, the upper driving block 402 and the lower driving block 403 can be driven to move towards each other or move away from each other, so that the distance between the upper driving block 402 and the lower driving block 403 is reduced or increased. When the distance between the upper driving block 402 and the lower driving block 403 is reduced, the angles between the first link 405 and the upper driving block 402, the angles between the second link 406 and the upper driving block 402, the angles between the third link 407 and the lower driving block 403, and the angles between the fourth link 408 and the lower driving block 403 are all increased, the angles between the first link 405 and the fixed link 302, the angles between the fourth link 408 and the fixed link 302, the angles between the second link 406 and the movable link 404, and the angles between the third link 407 and the movable link 404 are all reduced, the distance between the fixed link 302 and the movable link 404 is increased, and the movable link 404 is fixed to move towards the right. Conversely, when the distance between the upper driving block 402 and the lower driving block 403 is increased, the distance between the fixed link 302 and the movable link 404 is reduced, and the movable link 404 is fixed to move towards the left.

[0040] In the embodiment, the left end of the first link 405 is hinged to the upper end of the fixed link 302, and the right end of the first link 405 is hinged to the left end of the upper driving block 402; the left end of the second link 406 is hinged to the right end of the upper driving block 402, and the right end of the second link 406 is hinged to the upper end of the movable link 404; the right end of the third link 407 is hinged to the upper end of the movable link 404, and the left end of the third link 407 is hinged to the right end of the lower driving block 403; the right end of the fourth link 408 is hinged to the left end of the lower driving block 403, and the left end of the fourth link 408 is hinged to the lower end of the fixed link 302.

[0041] In the embodiment, the movable link 404 and the fixed link 302 are parallel to each other, and the upper driving block 402 and the lower driving block 403 are parallel to each other.

[0042] In the embodiment, a guide sliding groove 303 is formed in the cylinder of the positioning cylinder 301 and extends in the up-down direction, and the movable link 404 passes through the guide sliding groove 303 and is fixedly connected to the cylinder. The movable link 404 passes through the guide sliding groove 303 and is in sliding fit with the guide sliding groove 303. The movable link 404 is connected to the cylinder by welding, and the welding seam is located on the outer wall of the cylinder. The guide sliding groove 303 can ensure the movement direction of the movable link 404 to be accurate, so as to ensure that the posture of the movable link 404 during movement does not tilt, thereby ensuring that the forces at different positions of the tapered boss 202 are more balanced.

[0043] In the embodiment, the center axes of the taper pressing cylinder 2, the guide cylinder 1 and the positioning cylinder 301 coincide; the pushing member comprises two push rods 409, the two push rods 409 are symmetrical to each other and the symmetry axis thereof is the center axis.

[0044] In the embodiment, the two push rods 409 comprise a main rod body 4091 and an adjusting screw rod 4092, the right part of the main rod body 4091 is provided with an adjusting screw hole, the adjusting screw rod 4092 is threadedly connected with the adjusting screw hole, and the end face of the bolt head of the adjusting screw rod 4092 abuts against the taper boss 202.

[0045] By rotating the adjusting screw rod 4092, the adjusting screw rod 4092 can move into or out of the adjusting screw hole, the total length of the push rod 409 can be changed, and thus different vehicle models can be adapted.

[0046] In the embodiment, the right part of the positioning cylinder 301 is provided with a plurality of positioning pins 304, the left part of the guide cylinder 1 is provided with a positioning connecting structure corresponding to the position of each positioning pin 304, the positioning connecting structure comprises a guide groove 103 and a positioning groove 104 which are sequentially communicated, the guide groove 103 is arranged on the inner wall of the guide cylinder 1 along the axial direction of the guide cylinder, and the positioning groove 104 is arranged on the inner wall of the guide cylinder 1 along the circumferential direction of the guide cylinder 1.

[0047] By rotating the positioning cylinder 301 after the positioning pin 304 enters the guide groove 103, each positioning pin 304 enters the corresponding positioning groove 104, so that the positioning cylinder 301 and the guide cylinder 1 cannot relatively move in the axial direction.

[0048] In the embodiment, the plurality of positioning pins 304 are uniformly arranged at equal intervals along the circumferential direction of the positioning cylinder 301. The number of the positioning pins 304 can be four.

[0049] The use steps of the simple hub pressing clamp in the embodiment are as follows:

[0050] In the first step, the guide cylinder 1 is sleeved into the half shaft sleeve 5, and the internal thread 101 of the guide cylinder 1 is connected with the external thread 501 of the half shaft sleeve 5.

[0051] Second step, the center hole of the hub assembly 6 is aligned with the guide cylinder 1, the hub assembly 6 is pushed to the right, then the tapered press-fit cylinder 2 is installed between the guide cylinder 1 and the hub assembly 6, the guide hole 201 of the tapered press-fit cylinder 2 is matched with the shaft hole of the guide outer wall 102 of the guide cylinder 1, the tapered boss 202 of the tapered press-fit cylinder 2 is matched with the bearing tapered hole 601 of the hub assembly 6, the hub assembly 6 is guided right after the tapered press-fit cylinder 2 is pushed to the right, the tapered press-fit cylinder 2 and the hub assembly 6 are continuously pushed to the right until the floating oil seal of the hub assembly 6 is 5mm in contact with the axle sleeve 5, then the pushing of the tapered press-fit cylinder 2 and the hub assembly 6 to the right is stopped;

[0052] Third step, the driving rod 401 is rotated to make the upper driving block 402 and the lower driving block 403 move away from each other, the distance between the two is increased, so that the distance between the fixed connecting rod 302 and the movable connecting rod 404 is reduced, and the push rod 409 is retreated to the leftmost position;

[0053] Fourth step, the thrust cylinder assembly 3 is inserted into the guide cylinder 1, the positioning pin 304 of the thrust cylinder assembly 3 is aligned with the guide groove 103 of the guide cylinder 1, after the positioning pin 304 enters the guide groove 103, the positioning cylinder 301 is rotated, so that each positioning pin 304 enters the corresponding positioning groove 104, thereby the positioning cylinder 301 and the guide cylinder 1 cannot move relatively in the axial direction;

[0054] Fifth step, the driving rod 401 is rotated to make the upper driving block 402 and the lower driving block 403 move towards each other, the distance between the two is reduced, so that the distance between the fixed connecting rod 302 and the movable connecting rod 404 is increased, the movable connecting rod 404 drives the push rod 409 to move to the right, the push rod 409 pushes the tapered press-fit cylinder 2 and the hub assembly 6 to the right, until the hub assembly 6 is press-fitted in place, then the rotation of the driving rod 401 is stopped;

[0055] Sixth step, after the hub assembly 6 is press-fitted in place, the driving rod 401 is rotated to make the upper driving block 402 and the lower driving block 403 move away from each other, the distance between the two is increased, so that the distance between the fixed connecting rod 302 and the movable connecting rod 404 is reduced, the push rod 409 is retreated to a position where it does not abut against the tapered press-fit cylinder 2, then the positioning cylinder 301 is rotated, so that each positioning pin 304 is rotated from the positioning groove 104 to align with the guide groove 103, then the positioning cylinder 301 is taken out, finally the tapered press-fit cylinder 2 and the guide cylinder 1 are taken out in sequence, and the press-fitting operation is completed.

[0056] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting, although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the technical solutions of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. A simple hub press fitting jig, characterized by: The application relates to a right-pressing assembly for a half shaft sleeve, which comprises a guide cylinder, a taper pressing cylinder, a thrust cylinder assembly and a driving assembly; the right part of the guide cylinder is provided with an inner thread for connecting with the outer thread of the half shaft sleeve, and the outer part of the guide cylinder is provided with a guide outer wall; the inner part of the taper pressing cylinder is provided with a guide hole, the guide hole is sleeved on the guide outer wall, and the outer part of the taper pressing cylinder is provided with a taper boss for abutting with the bearing taper hole of a hub assembly; the thrust cylinder assembly is detachably connected with the guide cylinder, the left side of the driving assembly is connected with the thrust cylinder assembly, the right side of the driving assembly abuts with the taper boss, and the driving assembly can exert a rightward pressure on the taper boss.

2. The simple hub press-fit jig according to claim 1, characterized by: The thrust cylinder assembly comprises a positioning cylinder and a positioning connecting rod connected with the positioning cylinder, the positioning cylinder is detachably connected with the left part of the guide cylinder; the driving assembly is arranged between the positioning connecting rod and the taper pressing cylinder, and the left side of the driving assembly is connected with the positioning connecting rod.

3. The simple hub press-fit jig according to claim 2, characterized by: The driving assembly comprises a driving rod, an upper driving block, a lower driving block, a moving connecting rod, a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod and a pushing member, the upper part and the lower part of the driving rod are respectively provided with screw segments, the upper driving block and the lower driving block are respectively connected with the screw segments of the upper part and the lower part of the driving rod; the positioning connecting rod, the first connecting rod, the upper driving block, the second connecting rod, the moving connecting rod, the third connecting rod, the lower driving block and the fourth connecting rod are sequentially connected and form an eight-connecting-rod mechanism, the moving connecting rod can be close to or far away from the positioning connecting rod by rotating the driving rod; the left end of the pushing member is connected with the moving connecting rod, and the right end of the pushing member abuts with the taper boss.

4. The simple hub press-fit jig according to claim 3, characterized by: The left end of the first connecting rod is hinged with the upper end of the positioning connecting rod, and the right end of the first connecting rod is hinged with the left end of the upper driving block; the left end of the second connecting rod is hinged with the right end of the upper driving block, and the right end of the second connecting rod is hinged with the upper end of the moving connecting rod; the right end of the third connecting rod is hinged with the upper end of the moving connecting rod, and the left end of the third connecting rod is hinged with the right end of the lower driving block; the right end of the fourth connecting rod is hinged with the left end of the lower driving block, and the left end of the fourth connecting rod is hinged with the lower end of the positioning connecting rod.

5. The simple hub press-fit jig according to claim 4, characterized by: The moving connecting rod and the positioning connecting rod are parallel to each other, and the upper driving block and the lower driving block are parallel to each other.

6. The simple hub press-fit clamp of claim 3, wherein: A guide sliding groove penetrating in the up-down direction is formed in the cylinder body of the positioning cylinder, the moving connecting rod penetrates through the guide sliding groove and is fixedly connected with the cylinder body; the moving connecting rod penetrates through the guide sliding groove and is in sliding fit with the guide sliding groove.

7. The simple hub press-fit clamp of claim 3, wherein: The central axes of the taper pressing cylinder, the guide cylinder and the positioning cylinder are coincident; the pushing member comprises two pushing rods, the two pushing rods are symmetrical to each other and the symmetry axis is the central axis.

8. The simple hub press-fit clamp of claim 7, wherein: The two pushing rods comprise a main rod body and an adjusting screw rod, the right part of the main rod body is provided with an adjusting screw hole, the adjusting screw rod is in threaded connection with the adjusting screw hole, and the end face of the screw head of the adjusting screw rod abuts with the taper boss.

9. The simple hub press-fit clamp of claim 2, wherein: The right part of the positioning cylinder is provided with a plurality of positioning pins, and the left part of the guide cylinder is provided with a positioning connecting structure corresponding to the position of each of the positioning pins, the positioning connecting structure comprises a guide groove and a positioning groove which are communicated in sequence, the guide groove is arranged on the inner wall of the guide cylinder along the axial direction of the guide cylinder, and the positioning groove is arranged on the inner wall of the guide cylinder along the circumferential direction of the guide cylinder.

10. The simple hub press-fit jig according to claim 9, characterized by: The plurality of positioning pins are uniformly arranged at equal intervals along the circumferential direction of the positioning cylinder.

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