Turnover mechanism for hub assembly

Abstract

The overturning mechanism for hub assembling comprises a rack, two movable seats, a first cantilever, a second cantilever, a driving unit and two grabbing arms, the first cantilever and the second cantilever are connected to the two movable seats respectively, and the driving unit is used for driving the two movable seats to move at the same time; the two grabbing arms are pivoted to the first cantilever and the second cantilever respectively, a rotating air cylinder used for driving the grabbing arm on the first cantilever to rotate is arranged on the first cantilever, a locking air cylinder is arranged on the second cantilever, a pressing block is fixed to a telescopic rod of the locking air cylinder, and a locking block is fixedly connected to the grabbing arm on the second cantilever. The locking air cylinder is used for driving the pressing block to move between the first position where the pressing block is attached to the locking block to limit rotation of the locking block relative to the second cantilever and the second position where the pressing block is separated from the locking block. The structure of the turnover mechanism is simplified, the equipment cost is reduced, the occupied space of the turnover mechanism is reduced, and it is ensured that the surface of the hub cannot be damaged during turnover.

Description

Technical Field

[0001] The utility model relates to the technical field of commercial vehicle chassis component assembly, in particular to a turning mechanism for wheel hub assembly. Background Art

[0002] When assembling the wheel end assembly of a commercial vehicle, it is necessary to press-fit the bearings, oil seals, etc. into the wheel hub. A general wheel hub usually includes an inner and outer end. During the assembly process, it is necessary to press-fit the bearings, oil seals and other components from the inner and outer ends of the wheel hub respectively. Therefore, when operating continuously on the assembly line, it is necessary to configure a flipping mechanism in front of the wheel hub pressing station to flip the wheel hub and achieve the purpose of pressing the wheel hub from the inner and outer ends.

[0003] The current wheel hub flipping mechanism generally utilizes two relatively arranged clamping arms to clamp the wheel hub, and then utilizes two rotating cylinders of the same model to synchronously drive the two clamping arms to rotate to achieve the flipping purpose. Although the two rotating cylinders are of the same model, in the actual production process, due to factors such as the rotating cylinder accuracy and the air supply path, the two rotating cylinders often cannot achieve a high degree of synchronization. When flipping the wheel hub, the two rotating cylinders that cannot be synchronized make it difficult for the two relative clamping arms to rotate synchronously, which will then apply a certain torsional stress to the clamped part of the wheel hub, causing damage to the surface of the wheel hub. In addition, since the volume of the rotating cylinders is large and it occupies more space, it is not conducive to the optimization of the spatial layout of the entire flipping mechanism. Utility Model Content

[0004] In view of the deficiencies of the prior art, the purpose of the present invention is to provide a turning mechanism for wheel hub assembly, which can avoid damage to the wheel hub surface.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The turning mechanism for wheel hub assembly comprises a frame, two movable seats connected to the frame and capable of moving along the length direction of the frame, a first cantilever, a second cantilever, a driving unit, and two grasping arms, the first cantilever and the second cantilever are respectively connected to the two movable seats and arranged oppositely, the driving unit is used to drive the two movable seats to move simultaneously so that the first cantilever and the second cantilever simultaneously approach each other or simultaneously move away from each other along the length direction of the frame; the two grasping arms are respectively pivotally connected to one end of the first cantilever and the second cantilever away from the movable seat, and the two grasping arms are arranged opposite to each other to form a clamping mechanism for clamping the wheel hub, a rotating cylinder for driving the grasping arm on the first cantilever to rotate is provided on the first cantilever, a locking cylinder is provided on the second cantilever, a pressing block is fixed on the telescopic rod of the locking cylinder, a locking block is fixedly connected to the grasping arm on the second cantilever, and the locking cylinder is used to drive the pressing block to move between a first position where it is abutted against the locking block to limit the rotation of the locking block relative to the second cantilever and a second position separated from the locking block.

[0007] The first cantilever and the second cantilever are pivotally connected to a rotating shaft at one end away from the movable seat, and the two grasping arms are respectively fixed on the two rotating shafts; the locking block is fixedly connected to the rotating shaft of the second cantilever, and a locking plane is provided on the locking block, and a clamping plane is provided on the clamping block, and the clamping plane is tightly attached to the locking plane when the clamping block is in the first position.

[0008] The grab arm includes a connecting plate and a clamping block. The outer side of the connecting plate is fixed on the rotating shaft, and the clamping block is fixed on the inner side of the connecting plate. The clamping block includes a top wall, a bottom wall and a flexible buffer strip located between the top wall and the bottom wall. The top wall, the bottom wall and the flexible buffer strip together form a slot with a C-shaped cross-section, and the openings of the slots on the two grab arms are arranged opposite to each other.

[0009] Two clamping blocks are fixed on the inner side of the connecting plate, and the two clamping blocks form a V-shape with an opening facing inwards on the inner side of the connecting plate.

[0010] A lifting seat and a servo electric cylinder for driving the lifting seat to move in the height direction of the frame are installed on the frame, two movable seats are installed on the lifting seat, and the first cantilever and the second cantilever are respectively extended downwardly from the two movable seats.

[0011] The driving unit includes a cylinder, a gear and two racks. The gear is pivoted to the middle of the lifting seat. The two racks are respectively fixed on the two movable seats. The two racks extend along the length direction of the frame and are respectively engaged with the two sides of the gear. The cylinder body is fixed on the first cantilever and the telescopic rod is fixed on the second cantilever.

[0012] The utility model also comprises a conveying assembly which is located below the two grasping arms and is used for conveying the wheel hub in the length direction of the frame.

[0013] The conveying assembly includes a plurality of conveying rollers, and a lifting assembly is arranged below the plurality of conveying rollers. The lifting assembly includes more than two support plates that can pass through the gaps between adjacent conveying rollers, and a lifting cylinder for driving the support plates to move up and down.

[0014] The conveying assembly is provided with two guide bars and a material stopper assembly. The two guide bars are respectively located on both sides above the conveying assembly to guide the wheel hub on the conveying assembly. The material stopper assembly includes a material stopper bar and a driving member. The driving member is used to drive the material stopper bar to move so that the material stopper bar moves between a position above the conveying assembly to block the wheel hub and a position away from the conveying assembly.

[0015] The driving part is a driving cylinder, and the material blocking assembly also includes a lifting plate installed on the frame and movable along the height direction of the frame, a screw rod used to drive the lifting plate to move up and down relative to the frame, the material blocking strip is horizontally arranged and pivotally connected to the lifting plate, the cylinder body of the driving cylinder is hinged on the lifting plate, and the telescopic rod is hinged on the material blocking strip.

[0016] The beneficial effects of the utility model are:

[0017] The utility model adopts a rotating cylinder to realize the flipping of the wheel hub, simplifies the structure and equipment cost of the flipping mechanism, and reduces the space occupied by the flipping mechanism; because one of the grab arms is driven by the rotating cylinder and the other grab arm is passively rotated during the flipping process of the wheel hub, the rotation of the two grab arms is synchronous, and no torsional stress is applied to the wheel hub, ensuring that the surface of the wheel hub will not be damaged during flipping. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 for Figure 1 A-direction view;

[0020] Figure 3 for Figure 1 Schematic diagram of the structure of the middle grab arm;

[0021] Figure 4 for Figure 1 B-direction view;

[0022] Figure 5 for Figure 1 Schematic diagram of the structure of the middle stopper assembly. DETAILED DESCRIPTION

[0023] Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described:

[0024] like Figure 1 , 2, 3, is a hub assembly turning mechanism of the utility model, which includes a frame 10, two movable seats 21, a first cantilever 31, a second cantilever 32, a driving unit, and two grab arms 40, the frame 10 is the installation base part of the whole mechanism, wherein the X direction is the length direction of the frame 10, the Y direction is the width direction of the frame 10, and the Z direction is the height direction of the frame 10, the two movable seats 21 are movably installed on the frame 10 and have the freedom to move relative to the frame 10 along the X direction, the first cantilever 31 and the second cantilever 32 are arranged relatively and respectively Connected to the two movable seats 21, specifically, the first cantilever 31 and the second cantilever 32 respectively have two movable seats 21 extending obliquely downward, and the driving unit is used to drive the two movable seats 21 to move simultaneously, so that the two movable seats 21 can drive the first cantilever 31 and the second cantilever 32 to approach each other or move away from each other at the same time; the two grasping arms 40 are respectively pivotally connected to one end of the first cantilever 31 and the second cantilever 32 away from the movable seat 21, and the two grasping arms 40 are arranged opposite to each other, and the two grasping arms 40 arranged opposite to each other form a clamping mechanism, which is used to clamp the wheel hub. A rotating cylinder 33 is provided on the first cantilever 31, and the rotating cylinder 33 is used to drive the grab arm 40 located on the first cantilever 31 to rotate. A locking cylinder 34 is provided on the second cantilever 32. A clamping block 35 is fixedly connected to the telescopic rod of the locking cylinder 34, and a locking block 36 is fixedly connected to the grab arm 40 located on the second cantilever 32. The locking block 36 cooperates with the clamping block 35, and the locking cylinder 34 is used to drive the clamping block 35 to move, so that the clamping block 35 can be in a first position where it abuts against the locking block 36 to limit the rotation of the locking block relative to the second cantilever 32 and a second position where the locking block 36 is fixedly connected to the grab arm 40 of the second cantilever 32. The locking block 36 is moved between the second cantilever 32 and the second position separated from the locking block 36, that is, when the telescopic rod of the locking cylinder 34 is extended, it drives the clamping block 35 to move to the first position, and the clamping block 35 and the locking block 36 are tightly together to prevent the locking block 36 from rotating, thereby preventing the grasping arm 40 located on the second cantilever 32 from rotating relative to the second cantilever 32. Conversely, when the telescopic rod of the locking cylinder 34 is contracted, it drives the clamping block 35 to move to the second position, and the clamping block 35 is separated from the locking block 36. At this time, the grasping arm 40 located on the second cantilever 32 has the freedom to rotate relative to the second cantilever 32.

[0025] When the wheel hub is flipped, the locking cylinder 34 drives the pressing block 35 to be located in the first position to press the locking block 36. At this time, the grabbing arm 40 located on the second cantilever 32 is in a horizontal state, and the grabbing arm 40 on the first cantilever 31 is in a horizontal state driven by the rotating cylinder 33. At this time, the two grabbing arms 40 are relatively arranged to form a clamping mechanism to transport the wheel hub to the flipping station. The two movable seats 21 are in a relatively far position. At this time, the wheel hub is located between the two grabbing arms 40. The two movable seats 21 are driven by the driving unit to move so that the two grabbing arms 40 are close to each other. The flange of the wheel hub is clamped by the locking cylinder 34, and the wheel hub is clamped. Then, the locking cylinder 34 drives the pressing block 35 to move to the second position, and the rotating cylinder 35 drives the grabbing arm 40 on the first cantilever 31 to rotate 180°. At the same time, the grabbing arm 40 on the second cantilever 32 is passively rotated 180°. After the wheel hub is flipped, the locking cylinder 34 drives the pressing block 35 to move to the first position again to press the locking block 36. Then, the two movable seats 21 are driven away from each other by the driving unit, so that the two grabbing arms 40 release the wheel hub to prepare for the next wheel hub flip. In the utility model, the wheel hub flipping can be realized by using a rotating cylinder, which simplifies the structure and equipment cost of the flipping mechanism and reduces the space occupied by the flipping mechanism. Since one of the grabbing arms is driven by the rotating cylinder, and the other grabbing arm is passively rotated during the wheel hub flipping process, the rotation of the two grabbing arms is synchronous, and no torsional stress is applied to the wheel hub, ensuring that the wheel hub surface will not be damaged during flipping.

[0026] In a preferred embodiment, the utility model has a pivot shaft 401 pivotally connected to one end of the first cantilever 31 and the second cantilever 32 away from the movable seat 21, and the two grasping arms 40 are fixed on the two pivot shafts 401. The locking block 36 is fixedly connected to the pivot shaft 401 of the second cantilever 32, and a locking plane 361 is provided on the locking block 36, and a clamping plane 351 is provided on the clamping block 35. When the clamping block 35 is in the first position, the clamping plane 351 is tightly attached to the locking plane 361. Through the two mating planes, the clamping block 35 can lock the rotational freedom of the locking block 36 when it is in the first position to prevent the locking block 36 from swinging.

[0027] The gripping arm 40 includes a connecting plate 41 and a clamping block. The outer side of the connecting plate 41 is fixed on the rotating shaft 401, and the clamping block is fixed on the inner side of the connecting plate 41. The clamping block includes a top wall 42, a bottom wall 43 and a flexible buffer strip 44 located between the top wall 42 and the bottom wall 43. The top wall 42, the bottom wall 43 and the flexible buffer strip 44 together form a slot with a C-shaped cross-section, which can allow the flange of the wheel hub to be embedded. The slot openings of the two gripping arms 40 are arranged opposite to each other, so that the two gripping arms 40 can clamp the two sides of the wheel hub flange respectively. By arranging the flexible buffer strip 44, the gripping arm 40 is prevented from rigidly colliding with the wheel hub when it moves laterally and contacts the wheel hub flange, thereby protecting the surface of the wheel hub. In order to increase the stability of clamping the wheel hub and prevent the wheel hub from loosening, the two clamping blocks mentioned above can be fixed on the inner side of the connecting plate 41. The two clamping blocks form a V-shape with the opening facing inward on the inner side of the connecting plate 41. In this way, each grab arm 40 has at least two points of contact with the surface of the wheel hub flange when in contact, thereby preventing the wheel hub from loosening.

[0028] The wheel hub assembly flipping mechanism of the utility model is arranged on the wheel hub assembly line. In order to adapt to the conveying unit of the wheel hub assembly line, a lifting seat 20 and a servo electric cylinder 22 are installed on the frame 10. The lifting seat 20 is installed on the frame 10 through a linear guide rail 101 located on the frame 10 and extending in the height direction of the frame 10. The servo electric cylinder 22 drives the lifting seat 20 to move in the height direction of the frame 10. Two movable seats 21 are installed on the lifting seat 20. The first cantilever 31 and the second cantilever 32 are respectively extended downwardly from the two movable seats 21. When the conveying unit on the wheel hub assembly line conveys the wheel hub to the flipping mechanism, the lifting seat 20 is in a high position, and the lifting seat 20 is driven downward by the cylinder 22, so that the two grab arms 40 are at a position consistent with the flange height of the wheel hub, and then the wheel hub is clamped, and the lifting seat 20 is driven up and down by the servo electric cylinder 22. The height of the up and down movement of the lifting seat 20 can be accurately controlled, and then the two grab arms 40 can be accurately positioned in the height direction. In this way, for different models of wheel hubs, the grab arms 40 can move to the corresponding height to keep flush with the flange of the wheel hub. The above-mentioned driving unit includes a cylinder 30, a gear 201, and two racks 211, wherein the gear 201 is pivoted at the middle of the lifting seat 20, and the two racks 211 are respectively fixed on the two movable seats 21, and the two racks 211 extend along the length direction of the frame 10 and are respectively engaged with the upper and lower sides of the gear 201. The cylinder body of the cylinder 22 is fixed on the first cantilever 31, and the telescopic rod is fixed on the second cantilever 32. In this way, the two movable seats 21 can be driven to approach or move away at the same time through the cylinder 22.

[0029] In other embodiments, the lifting seat 20 may be replaced by a movable seat that moves along the width direction of the frame 10 (i.e., the Y direction in the figure), that is, the movable seat that moves along the Y direction enables the first cantilever 31 and the second cantilever 32 to move in the Y direction. When the wheel hub is transported to the flipping mechanism, the first cantilever 31 and the second cantilever 32 that move along the Y direction enable the two gripping arms 40 to move to both sides of the wheel hub, and then clamp the wheel hub.

[0030] The turning mechanism of the present invention further comprises a conveying assembly 50, which is located below the two gripping arms 40 and is used to convey the wheel hub in the length direction of the frame 10. The conveying assembly 50 can be connected with the conveying unit of the wheel hub assembly line. The conveying assembly 50 is a roller conveying assembly, which includes a plurality of conveying rollers 51. A lifting assembly is arranged below the plurality of conveying rollers 51. The lifting assembly includes more than two support plates 61 that can pass through the gaps between adjacent conveying rollers 51, and a lifting cylinder 60 for driving the support plates 61 to move up and down. When turning over different types of wheel hubs, the flange heights of the wheel hubs may be different. The lifting cylinder 60 drives the support plate 61 to move upward, and uses the support plate 61 to lift the wheel hub to a certain height, so that the flange of the wheel hub can be in the same horizontal position as the grab arm 40, and then the grab arm 40 can clamp the flange of the wheel hub; lifting the wheel hub to a certain height by the lifting assembly is particularly suitable for some wheel hubs with a small distance between the flange and the lower end surface. After the wheel hub is lifted to a certain height, there is enough space between the flange of the wheel hub and the top surface of the conveying assembly 50, so that the grab arm 40 can clamp the wheel hub from the side of the wheel hub, avoiding interference between the grab arm 40 and the conveying assembly 50.

[0031] Two guide bars 52 and a material blocking assembly are also provided on the conveying assembly 50. The two guide bars 52 are respectively located on both sides above the conveying assembly. The two guide bars are used to guide the wheel hub so that the wheel hub can be conveyed to a position aligned with the grab arm 40 in the Y direction. The material blocking assembly includes a material blocking bar 71 and a driving member. The driving member is used to drive the material blocking bar 71 to move so that the material blocking bar 71 can move between a position above the conveying assembly 50 to block the wheel hub and a position away from the conveying assembly 50, that is, when the wheel hub 50 is conveyed to the bottom of the center position of the two grab arms 40 by the conveying assembly 50, the material blocking bar 71 blocks the wheel hub 50. When the wheel hub completes flipping, the material blocking bar moves to a position away from the conveying assembly 50, so that the flipped wheel hub 50 is sent to the next process by the conveying assembly 50. The above-mentioned driving member is a driving cylinder 72. The material stopping assembly also includes a lifting plate 73 installed on the frame 10 and movable in the height direction of the frame 10, and a screw rod 74 used to drive the lifting plate 73 to move up and down relative to the frame. The material stopping bar 71 is horizontally arranged and pivotally connected to the lifting plate 73. The cylinder body of the driving cylinder 72 is hinged on the lifting plate 73, and the telescopic rod is hinged on the material stopping bar 71. When it is necessary to block the wheel hub, the driving cylinder 72 is started to drive the material stopping bar 71 to rotate 90 degrees, so that the material stopping bar 71 rotates to the top of the conveying assembly 50 and is perpendicular to the conveying direction of the conveying assembly 50 to block the wheel hub. When the flipping is completed, the driving cylinder 72 drives the material stopping bar 71 to swing horizontally to the outside of the conveying assembly 50. When the wheel hub is at different heights, the height of the lifting plate 73 can be adjusted by the screw rod 74, and then the height of the material stopping bar 71 can be adjusted.

[0032] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A turning mechanism for wheel hub assembly, characterized in that: The cam is configured to move the first and second cams together to form a rotation of the two handlebars, wherein the rotation of the two handlebars is performed on the cam face, and the rotation of the two handlebars is performed on the cam face.

2. The wheel hub assembly turning mechanism according to claim 1, characterized in that: The first cantilever and the second cantilever are pivotally connected to a rotating shaft at one end away from the movable seat, and the two grasping arms are respectively fixed on the two rotating shafts; the locking block is fixedly connected to the rotating shaft of the second cantilever, and a locking plane is provided on the locking block, and a clamping plane is provided on the clamping block, and the clamping plane is tightly attached to the locking plane when the clamping block is in the first position.

3. The wheel hub assembly turning mechanism according to claim 2, characterized in that: The grab arm includes a connecting plate and a clamping block. The outer side of the connecting plate is fixed on the rotating shaft, and the clamping block is fixed on the inner side of the connecting plate. The clamping block includes a top wall, a bottom wall and a flexible buffer strip located between the top wall and the bottom wall. The top wall, the bottom wall and the flexible buffer strip together form a slot with a C-shaped cross-section, and the openings of the slots on the two grab arms are arranged opposite to each other.

4. The wheel hub assembly turning mechanism according to claim 3, characterized in that: Two clamping blocks are fixed on the inner side of the connecting plate, and the two clamping blocks form a V-shape with an opening facing inwards on the inner side of the connecting plate.

5. The wheel hub assembly turning mechanism according to claim 1, characterized in that: A lifting seat and a servo electric cylinder for driving the lifting seat to move in the height direction of the frame are installed on the frame, two movable seats are installed on the lifting seat, and the first cantilever and the second cantilever are respectively extended downwardly from the two movable seats.

6. The wheel hub assembly turning mechanism according to claim 5, characterized in that: The driving unit includes a cylinder, a gear and two racks. The gear is pivoted to the middle of the lifting seat. The two racks are respectively fixed on the two movable seats. The two racks extend along the length direction of the frame and are respectively engaged with the two sides of the gear. The cylinder body is fixed on the first cantilever and the telescopic rod is fixed on the second cantilever.

7. The wheel hub assembly turning mechanism according to claim 1, characterized in that: The utility model also comprises a conveying assembly which is located below the two grasping arms and is used for conveying the wheel hub in the length direction of the frame.

8. The wheel hub assembly turning mechanism according to claim 7, characterized in that: The conveying assembly includes a plurality of conveying rollers, and a lifting assembly is arranged below the plurality of conveying rollers. The lifting assembly includes more than two support plates that can pass through the gaps between adjacent conveying rollers, and a lifting cylinder for driving the support plates to move up and down.

9. The wheel hub assembly turning mechanism according to claim 7, characterized in that: The conveying assembly is provided with two guide bars and a material stopper assembly. The two guide bars are respectively located on both sides above the conveying assembly to guide the wheel hub on the conveying assembly. The material stopper assembly includes a material stopper bar and a driving member. The driving member is used to drive the material stopper bar to move so that the material stopper bar moves between a position above the conveying assembly to block the wheel hub and a position away from the conveying assembly.

10. The wheel hub assembly turning mechanism according to claim 9, characterized in that: The driving part is a driving cylinder, and the material blocking assembly also includes a lifting plate installed on the frame and movable along the height direction of the frame, a screw rod used to drive the lifting plate to move up and down relative to the frame, the material blocking strip is horizontally arranged and pivotally connected to the lifting plate, the cylinder body of the driving cylinder is hinged on the lifting plate, and the telescopic rod is hinged on the material blocking strip.

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