Positioning device with hydraulic ejector pin

Abstract

The positioning device with the hydraulic ejector pin comprises a vertical machining center workbench and a fourth shaft mechanism arranged on the vertical machining center workbench, a clamping mechanism is installed on the vertical machining center workbench, and a differential mechanism and a positioning mechanism are arranged between the clamping mechanism and the fourth shaft mechanism. The clamping mechanism comprises a fixing support installed on the upper surface of the vertical machining center workbench, and a hydraulic ejector pin capable of moving in the horizontal direction is installed on the fixing support. The device is simple in structure, through the cooperation of the fixing support and the hydraulic ejector pin, when the end of the hydraulic ejector pin enters the differential mechanism, the differential mechanism can be calibrated and positioned, and when the end of the hydraulic ejector pin is separated from the differential mechanism, the differential mechanism can be replaced, and compared with bolt fixing and pressing, hydraulic ejector pin pressing and fixing are more convenient and faster; the operation is simpler, and the efficiency of compressing and fixing the differential mechanism can be greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of differential assembly, in particular to a positioning device with a hydraulic ejector pin. Background Art

[0002] The origin of the differential can be traced back to the early stages of the automotive industry. As automotive technology continued to develop, engineers discovered that when a vehicle turns, due to the different lengths of the paths taken by the inner and outer wheels, a mechanism is needed to allow the wheels to rotate at different speeds. Thus, the differential came into being, which enables the left and right (or front and rear) drive wheels to rotate at different speeds, thereby ensuring that when the vehicle turns or drives on uneven roads, the wheels can roll at the correct rotation speed difference to avoid skidding or loss of control.

[0003] The differential needs to be fixed with the positioning device during processing. Currently, bolts are used for fixing and pressing, and the positioning of the differential and the positioning device adopts a positioning form of two holes on one side. The matching accuracy of the positioning shaft holes is a small clearance match, which causes the center of the differential and the rotation center of the fourth axis to not coincide. The clamping process is labor-intensive and inefficient. For this purpose, a positioning device with a hydraulic ejector is provided. Utility Model Content

[0004] The purpose of the utility model is to provide a positioning device with a hydraulic ejector pin to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a positioning device with a hydraulic ejector, comprising a vertical machining center worktable and a fourth axis mechanism arranged on the vertical machining center worktable, a clamping mechanism is installed on the vertical machining center worktable, a differential and a positioning mechanism are arranged between the clamping mechanism and the fourth axis mechanism, the clamping mechanism comprises a fixed bracket installed on the upper surface of the vertical machining center worktable, and a hydraulic ejector that can move in a horizontal direction is installed on the fixed bracket.

[0006] As a further solution of the utility model: the positioning mechanism includes a centering transition plate and a positioning seat, the positioning seat is arranged on the side of the centering transition plate away from the fourth axis mechanism, and the end face of the centering transition plate away from the positioning seat is installed with multiple M bolts for fixing it to the fourth axis mechanism.

[0007] As a further solution of the utility model: the positioning seat is provided with a plurality of through holes in the circumferential direction, and positioning pins for limiting the centering transition plate and the positioning seat are provided in the plurality of through holes.

[0008] As a further solution of the utility model: at least one fixing bolt is installed on the positioning seat, and the end of the fixing bolt passes through the positioning seat and is threadedly connected to the centering transition plate.

[0009] As a further solution of the utility model: the end surface of the centering transition plate is provided with a positioning boss, which is configured to achieve the overlapping positioning of the positioning seat and the centering transition plate.

[0010] As a further solution of the utility model: a positioning hole is formed on the end surface of the positioning seat away from the centering transition plate, and the bottom surface of the positioning hole is a positioning reference surface.

[0011] As a further solution of the utility model: a circumferential positioning pin is installed at the center point of the positioning seat.

[0012] As a further solution of the utility model: a positioning outer ring adapted to the positioning hole is formed on the surface of the differential, the end face of the positioning outer ring is the differential positioning reference surface, the differential positioning reference surface is in contact with the positioning reference surface, a plurality of positioning pin holes are also installed on the differential positioning reference surface, and a chamfer is formed on the end face of the differential away from the differential positioning reference surface.

[0013] As a further solution of the utility model: the center of the chamfer coincides with the center of the differential, and the center of the hydraulic ejector coincides with the center of the fourth axis mechanism.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. Through the cooperation of the fixed bracket and the hydraulic ejector, when the end of the hydraulic ejector enters the inside of the differential, it can be calibrated and positioned. Secondly, when the end of the hydraulic ejector escapes from the inside of the differential, the differential can be replaced. Compared with bolt fixing, hydraulic ejector clamping and fixing is more convenient and simpler to operate, which can greatly improve the efficiency of clamping and fixing the differential.

[0016] 2. The centering transition plate and the positioning seat are calibrated and positioned by the positioning pins and the positioning bosses. Then, the centering transition plate and the positioning seat are fixed by the fixing bolts. This facilitates the subsequent positioning of different types of differentials. Only the positioning seat needs to be replaced, and there is no need to replace the entire positioning mechanism. At the same time, this can also reduce certain costs when making the matching positioning mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the assembly of the differential and the positioning mechanism of the utility model;

[0018] Figure 2 It is a cross-sectional schematic diagram of the positioning mechanism of the utility model;

[0019] Figure 3 It is a cross-sectional schematic diagram of a differential of the utility model;

[0020] Figure 4 This is a schematic diagram of the positioning pin hole of the utility model;

[0021] Figure 5 It is a schematic diagram of the clamping mechanism of the utility model;

[0022] Figure 6 It is a schematic diagram of the assembly of the vertical machining center workbench, the fourth axis mechanism and the clamping mechanism of the utility model;

[0023] In the figure: 1. Differential; 11. Differential positioning reference surface; 12. Positioning outer ring; 13. Positioning pin hole; 14. Chamfer; 2. Positioning mechanism; 21. M16 bolt; 22. Centering transition plate; 221. Positioning boss; 23. Positioning seat; 231. Positioning reference surface; 232. Positioning hole; 24. Circumferential positioning pin; 25. Fixing bolt; 26. Positioning pin; 3. Clamping mechanism; 31. Fixed bracket; 32. Hydraulic ejector; 4. Vertical machining center worktable; 5. Fourth axis mechanism. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-6 In an embodiment of the utility model, a positioning device with a hydraulic ejector includes a vertical machining center worktable 4 and a fourth axis mechanism 5 arranged on the vertical machining center worktable 4, a clamping mechanism 3 is installed on the vertical machining center worktable 4, a differential 1 and a positioning mechanism 2 are arranged between the clamping mechanism 3 and the fourth axis mechanism 5, the clamping mechanism 3 includes a fixed bracket 31 installed on the upper surface of the vertical machining center worktable 4, a hydraulic ejector 32 that can move in a horizontal direction is installed on the fixed bracket 31, and by adding the hydraulic ejector 32, the center line of the hydraulic ejector 32 coincides with the rotation center line of the fourth axis mechanism 5.

[0026] Specifically, the upper surface of the workbench 4 of the vertical machining center is respectively equipped with a clamping mechanism 3 and a fourth axis mechanism 5, and the clamping mechanism 3 and the fourth axis mechanism 5 are used to position and clamp the differential 1 and the positioning mechanism 2. The two sides of the differential 1 are respectively positioned and clamped by the clamping mechanism 3 and the positioning mechanism 2. Secondly, under the action of the fixed bracket 31, a certain support can be provided for the hydraulic ejector pin 32. After the height of the hydraulic ejector pin 32 is confirmed, it can extend or retract in its horizontal direction. When the hydraulic ejector pin 32 extends and enters the interior of the differential 1, it can position one side of the differential 1. When the hydraulic ejector pin 32 retracts and leaves the interior of the differential 1, the differential 1 can be removed and replaced.

[0027] See also Figure 2 and Figure 6 In one embodiment, in this embodiment, preferably, the positioning mechanism 2 includes a centering transition plate 22 and a positioning seat 23, the positioning seat 23 is arranged on the side of the centering transition plate 22 away from the fourth axis mechanism 5, the centering transition plate 22 is a transition mechanism for aligning the rotation center of the positioning seat 23 with the fourth axis mechanism 5, and the end surface of the centering transition plate 22 away from the positioning seat 23 is installed with a plurality of M16 bolts 21 for fixing it to the fourth axis mechanism 5.

[0028] Specifically, the center of the centering transition plate 22 is first calibrated to coincide with the rotation center of the fourth axis mechanism 5, and the centering transition plate 22 is fixed to the fourth axis mechanism 5 by the M16 bolt 21, so that the center of the centering transition plate 22 coincides with the rotation center of the fourth axis mechanism 5, and the positioning seat 23 is used to position the end face of the differential 1, and the center of the differential 1 coincides with the center of the positioning seat 23, and the centers of the centering transition plate 22 and the positioning seat 23 also coincide after being fixed, and the center lines of the differential 1, the positioning seat 23, the centering transition plate 22 and the fourth axis mechanism 5 are in the same horizontal plane.

[0029] See also Figure 2 In one embodiment, in this embodiment, preferably, the positioning seat 23 is circumferentially provided with a plurality of through holes, and each of the plurality of through holes is provided with a positioning pin 26 for limiting the centering transition plate 22 and the positioning seat 23 .

[0030] Specifically, by inserting a positioning pin 26 into each through hole, after the end of the positioning pin 26 passes through the positioning seat 23 and enters the centering transition plate 22, under the action of the positioning pin 26, the positioning seat 23 and the centering transition plate 22 can be limited to ensure that the centers of the two coincide.

[0031] See also Figure 2In one embodiment, in this embodiment, preferably, at least one fixing bolt 25 is installed on the positioning seat 23, and the end of the fixing bolt 25 passes through the positioning seat 23 and is threadedly connected to the centering transition plate 22.

[0032] Specifically, the middle part of the locating seat 23 is recessed inward to form an inner hole, and a fixing bolt 25 is installed at the bottom of the inner hole. The fixing bolt 25 is threadedly connected to the locating seat 23 and the centering transition plate 22 respectively. After the fixing bolt 25 is completely screwed into the interior of the locating seat 23 and the centering transition plate 22, the two can be fixed. After the fixing bolt 25 is screwed out of the centering transition plate 22, the locating seat 23 and the centering transition plate 22 can be disassembled. At this time, when the model of the differential 1 changes and the corresponding locating seat 23 needs to be replaced, there is no need to remove the locating mechanism 2 from the fourth axis mechanism 5 as a whole. It is only necessary to screw out the fixing bolt 25 and replace the locating seat 23.

[0033] See also Figure 2 In one embodiment, in this embodiment, preferably, a positioning boss 221 is provided on the end face of the centering transition plate 22, which is configured to achieve the overlapping positioning of the positioning seat 23 and the centering transition plate 22. Further, the positioning seat 23 can quickly achieve the overlapping positioning of the positioning seat 23 and the centering transition plate 22 through the positioning boss 221 and the positioning pin 26.

[0034] See also Figure 2 In one embodiment, in this embodiment, preferably, a positioning hole 232 is formed on the end surface of the positioning seat 23 away from the centering transition plate 22, and the bottom surface of the positioning hole 232 is a positioning reference surface 231.

[0035] See also Figure 2 In one embodiment, in this embodiment, preferably, a circumferential positioning pin 24 is installed at the center point of the positioning seat 23.

[0036] See also Figure 2-4 In one embodiment, in this embodiment, preferably, a positioning outer ring 12 adapted to the positioning hole 232 is formed on the surface of the differential 1, and the end face of the positioning outer ring 12 is the differential positioning reference surface 11, and the differential positioning reference surface 11 contacts the positioning reference surface 231. A plurality of positioning pin holes 13 are also installed on the differential positioning reference surface 11, and an inner hole chamfer 14 is formed on the end face of the differential 1 away from the differential positioning reference surface 11. Further, the differential positioning reference surface 11 and the differential positioning outer ring 12 are respectively matched with the positioning reference surface 231, and the circumferential positioning pin 24 is matched with the differential positioning pin hole 13. At this point, the positioning is completed, and then the hydraulic ejector 32 is used to complete the fixing and tightening of the differential 1.

[0037] See also Figure 1-5In one embodiment, in this embodiment, preferably, the center of the inner hole chamfer 14 coincides with the center of the differential 1, and the center of the hydraulic ejector pin 32 coincides with the rotation center of the fourth shaft mechanism 5. Further, the end of the hydraulic ejector pin 32 is set to a conical surface, and the conical surface angle of the hydraulic ejector pin 32 is 120°, and the inner hole chamfer 14 is 30°, which facilitates the hydraulic ejector pin 32 to be better inserted into the interior of the differential 1. Therefore, when the conical surface of the hydraulic ejector pin 32 contacts and coincides with the chamfer 14, the center of the differential 1 coincides with the rotation center of the fourth shaft mechanism 5.

[0038] The working principle and use process of the utility model are as follows: first, the center of the centering transition plate 22 is calibrated to make it coincide with the center of the fourth axis mechanism 5, and then the clamping mechanism 3 is started, and the differential 1 is fixed and tightened by the hydraulic ejector pin 32, and the center of the differential 1 coincides with the center of the fourth axis mechanism 5, that is, the differential 1 is hoisted on the positioning mechanism 2, and the hydraulic ejector pin 32 is extended to hold the chamfer 14, so as to complete the positioning and pressing of the differential 1, and finally the differential 1 is cross-axis processed by the processing equipment.

[0039] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0040] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent changes made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A hydraulic ejector positioning device, comprising a vertical machining center worktable (4) and a fourth axis mechanism (5) arranged on the vertical machining center worktable (4), characterized in that: A clamping mechanism (3) is installed on the vertical machining center worktable (4), a differential (1) and a positioning mechanism (2) are provided between the clamping mechanism (3) and the fourth axis mechanism (5), the clamping mechanism (3) comprises a fixed bracket (31) installed on the upper surface of the vertical machining center worktable (4), and a hydraulic ejector (32) movable in a horizontal direction is installed on the fixed bracket (31).

2. The positioning device with hydraulic ejector pin according to claim 1, characterized in that: The positioning mechanism (2) comprises a centering transition plate (22) and a positioning seat (23); the positioning seat (23) is arranged on a side of the centering transition plate (22) away from the fourth axis mechanism (5); and a plurality of M16 bolts (21) for fixing the centering transition plate (22) to the fourth axis mechanism (5) are mounted on an end surface of the centering transition plate (22) away from the positioning seat (23).

3. The hydraulic ejector positioning device according to claim 2, characterized in that: The positioning seat (23) is provided with a plurality of through holes extending through the circumference, and each of the plurality of through holes is provided with a positioning pin (26) for limiting the centering transition plate (22) and the positioning seat (23).

4. The positioning device with hydraulic ejector pin according to claim 2, characterized in that: At least one fixing bolt (25) is installed on the positioning seat (23), and an end of the fixing bolt (25) passes through the positioning seat (23) and is threadedly connected to the centering transition plate (22).

5. The positioning device with hydraulic ejector pin according to claim 2, characterized in that: The end surface of the centering transition plate (22) is provided with a positioning boss (221), which is configured to achieve the overlapping positioning of the positioning seat (23) and the centering transition plate (22).

6. The positioning device with hydraulic ejector pin according to claim 2, characterized in that: A positioning hole (232) is formed on the end surface of the positioning seat (23) away from the centering transition plate (22), and the bottom surface of the positioning hole (232) is a positioning reference surface (231).

7. The positioning device with hydraulic ejector pin according to claim 2, characterized in that: A circumferential positioning pin (24) is installed at the center point of the positioning seat (23).

8. The positioning device with hydraulic ejector pin according to claim 6, characterized in that: The surface of the differential (1) is formed with a positioning outer ring (12) adapted to the positioning hole (232); the end face of the positioning outer ring (12) is a differential positioning reference surface (11); the differential positioning reference surface (11) is in contact with the positioning reference surface (231); a plurality of positioning pin holes (13) are also installed on the differential positioning reference surface (11); and a chamfer (14) is formed on the end face of the differential (1) away from the differential positioning reference surface (11).

9. The positioning device with hydraulic ejector pin according to claim 8, characterized in that: The center of the chamfer (14) coincides with the center of the differential (1), and the center of the hydraulic ejector pin (32) coincides with the rotation center of the fourth axis mechanism (5).

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