Spline press-fitting alignment device and method

Abstract

The present application relates to a kind of spline press installation alignment device and method, belong to alignment press-in field.It includes: press mechanism, pressure head mechanism, alignment servo, swing arm mechanism, limit block tooling mechanism, drive nut assembly mechanism, counterforce support mechanism, clamping mechanism, rack and control structure;Press mechanism is installed in rack top, pressure head mechanism and clamping mechanism are all installed in rack side wall, the top and bottom of pressure head mechanism one-to-one with press mechanism and limit block tooling mechanism are connected, both ends of swing arm mechanism one-to-one with alignment servo and limit block tooling mechanism are connected, counterforce support mechanism is installed in rack bottom inner wall, drive nut assembly mechanism is set in counterforce support mechanism top, and is connected with clamping mechanism, control mechanism is connected with alignment servo.The present application is favorable to automatic counter drive nut assembly and limit block press-in, improves press-in efficiency and press-in quality.

Description

Technical Field

[0001] This invention relates to the field of alignment press fitting, and more particularly to a spline press fitting alignment device and method. Background Technology

[0002] Spline connections are a common and highly stable connection method, often used for stable connections between mechanical equipment and power transmission. In the automotive manufacturing industry, splines are frequently used to connect drive nut assemblies and limit blocks. However, current technology generally involves manually aligning the internal spline of the limit block's inner hole with the external spline on the lead screw in the drive nut assembly, followed by pressing using a tooling press. This alignment operation in current technology is heavily reliant on manual labor, has a low degree of automation, increases labor intensity, and makes it impossible to guarantee product quality stability due to varying worker skill levels. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a spline press-fitting alignment device and method, which automatically presses the drive nut assembly and the limiting block, thereby improving the press-fitting efficiency and press-fitting quality.

[0004] The technical solution of this invention to solve the above-mentioned technical problems is as follows: A spline press-fit alignment device, comprising: a press mechanism, a press head mechanism, an alignment servo, a swing arm mechanism, a limit block tooling mechanism, a drive nut assembly mechanism, a reaction force support mechanism, a clamping mechanism, a frame, and a control structure; the frame is a C-shaped block structure, the press mechanism is installed on the top of the frame, the press head mechanism and the clamping mechanism are both installed on the side wall of the frame, the top and bottom ends of the press head mechanism are connected one-to-one with the press mechanism and the limit block tooling mechanism, and the two ends of the swing arm mechanism are connected one-to-one with the alignment servo and the control structure. The limiting block tooling mechanism is connected, the reaction force support mechanism is installed on the inner wall of the bottom end of the frame, the drive nut assembly mechanism is located at the top of the reaction force support mechanism and connected to the clamping mechanism, and the control mechanism is connected to the alignment servo. The internal spline on the limiting block tooling mechanism is pressed down under the action of the press mechanism and the press head mechanism, and rotates coaxially under the action of the alignment servo and the swing arm mechanism. The external spline on the drive nut assembly mechanism is aligned and engaged with the internal spline on the limiting block tooling mechanism under the support of the reaction force support mechanism and the clamping action of the clamping mechanism.

[0005] The beneficial effects of this invention are as follows: the pressure head mechanism facilitates the transmission of pressure applied by the press mechanism to the limiting block tooling mechanism, thereby causing the internal spline on the limiting block tooling mechanism to abut against the external spline on the drive nut assembly mechanism; the alignment servo and swing arm mechanism facilitate the coaxial rotation of the internal spline on the limiting block tooling mechanism, thereby automatically finding the alignment angle of the internal and external splines, and judging whether the internal and external splines are aligned under the cooperation of the control mechanism; the reaction force support mechanism facilitates the provision of support for the drive nut assembly mechanism under pressure; and the clamping mechanism facilitates the prevention of rotation of the drive nut assembly mechanism, thereby improving the stability during alignment.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the press mechanism includes: a servo press head, a servo press head guide block, and a servo press head connecting block; the servo press head guide block is installed on the side wall of the frame, and the output shaft of the servo press head passes through the servo press head guide block and is coaxially connected with the servo press head connecting block.

[0008] The beneficial effects of adopting the above-mentioned further solution are: the servo pressure head is conducive to applying downward pressure, and the pressure is transmitted to the pressure head mechanism and the limit block tooling mechanism through the servo pressure head guide block and the servo pressure head connecting block, so as to realize the downward pressure after alignment.

[0009] Furthermore, the pressure head mechanism includes: a slider, a connecting column, a slide rail, and a first fixing plate; the first fixing plate is installed on the side wall of the frame, the slide rail is installed on the first fixing plate, the slider is slidably installed on the slide rail, and the top and bottom ends of the slider are coaxially connected to the servo pressure head connecting block and the connecting column respectively.

[0010] The beneficial effect of adopting the above-mentioned further solution is that the sliding of the slider up and down on the slide rail is conducive to transmitting the downward pressure to the connecting column and then to the limiting block tooling mechanism, so as to realize the downward pressure after alignment.

[0011] Furthermore, the limiting block tooling mechanism includes: a limiting block, a pressure head fixing block, and a second fixing plate; the pressure head fixing block is installed on the second fixing plate, the bottom end of the connecting column is connected to the top end of the pressure head fixing block, the alignment servo is installed on the second fixing plate, the pressure head fixing block is sleeved on the upper end of the limiting block, the internal spline is set on the bottom end of the limiting block, and the two ends of the swing arm mechanism are connected one-to-one with the upper ends of the alignment servo and the limiting block. The limiting block is pressed down under the action of the press mechanism and the pressure head mechanism, and rotates coaxially under the action of the alignment servo and the swing arm mechanism.

[0012] The beneficial effects of adopting the above-mentioned further solution are: the second fixed plate is conducive to realizing the synchronous up and down displacement of the limit block, the alignment servo and the swing arm mechanism, so that after the internal spline on the limit block is pressed down to abut against the external spline on the drive nut assembly mechanism, the limit block can be rotated coaxially.

[0013] Furthermore, the swing arm mechanism includes a moving fork, a rotating shaft, and a swing arm; one end of the moving fork is connected to the output shaft of the alignment servo, one end of the swing arm is connected to the upper end of the limiting block, and the other end of the moving fork and the other end of the swing arm are hinged together by the rotating shaft.

[0014] The beneficial effect of adopting the above-mentioned further solution is that the moving fork and the swing arm are hinged by a pivot, which is conducive to converting the push and pull of the alignment servo output shaft into coaxial rotation of the limit block.

[0015] Furthermore, the reaction support mechanism includes: a base plate, a support frame, a reaction support locking cylinder, a reaction support locking block, and a reaction support block; the base plate is installed on the inner wall of the bottom end of the frame, the support frame is set on the base plate, the reaction support locking block is a block structure with a wedge-shaped top, the reaction support locking cylinder is installed on the base plate, and its output shaft is connected to the reaction support locking block, and the reaction support block abuts against the top of the reaction support locking block.

[0016] The beneficial effects of adopting the above-mentioned further solution are: the top of the reaction force support locking block is a wedge-shaped block structure, which is conducive to the lifting and lowering of the reaction force support block under the pushing and pulling action of the output shaft of the reaction force support locking cylinder, thereby realizing the lifting and lowering of the drive nut assembly mechanism, and thus supporting the drive nut assembly mechanism, avoiding damage to the drive nut assembly mechanism under pressure.

[0017] Furthermore, the drive nut assembly mechanism includes: a lead screw, a nut, a fixing fixture, and a positioning sleeve; the positioning sleeve is disposed at the top of the support frame, the fixing fixture is fixedly installed on the base plate, the nut is sleeved on the lead screw, the lead screw passes through the fixing fixture, the positioning sleeve, and the support frame, and abuts against the top of the reaction force support block, and the external spline is disposed at the top of the lead screw.

[0018] The beneficial effects of adopting the above-mentioned further solution are: the fixed tooling and positioning sleeve help to limit the lead screw, so that the external spline on the lead screw and the internal spline on the limiting block are coaxial.

[0019] Furthermore, the clamping mechanism includes a clamping cylinder and a clamping head; the clamping cylinder is installed on the side wall of the frame, the lead screw is disposed in the middle of the clamping head, and the clamping head releases the lead screw under the action of the clamping cylinder.

[0020] The beneficial effect of adopting the above-mentioned further solution is that the clamping head, under the action of the clamping cylinder, helps to loosen the lead screw, thereby preventing the lead screw from rotating during the alignment process.

[0021] A spline press-fit alignment method includes the following steps:

[0022] S1: Install the limit block tooling mechanism below the pressure head mechanism, and install the drive nut assembly mechanism on the reaction force support mechanism;

[0023] S2: The drive nut assembly is lifted upwards by the reaction force support mechanism and clamped by the clamping mechanism.

[0024] S3: The press mechanism applies preload, and uses the transmission action of the press head mechanism to synchronously press down the limit block tooling mechanism, the swing arm mechanism and the alignment servo until the internal spline on the limit block tooling mechanism abuts against the external spline on the drive nut assembly mechanism.

[0025] S4: Start the alignment servo and use the swing arm mechanism to drive the internal spline on the limit block tooling mechanism to rotate coaxially.

[0026] S5: Monitor the current value within the positioning servo in step S4 using the control mechanism;

[0027] S6: When the control mechanism detects that the current value in the alignment servo rises to the preset current value, it indicates that the internal spline on the limit block tooling mechanism rotates to engage with the external spline on the drive nut assembly mechanism, and the spline alignment is completed.

[0028] S7: Turn off the alignment servo and increase the pressure applied by the press mechanism to press the limit block tooling mechanism and the drive nut assembly mechanism together.

[0029] The beneficial effects of this invention are: by monitoring the current value in the alignment servo, it is helpful to determine whether the internal spline on the limit block tooling mechanism and the external spline on the drive nut assembly mechanism are properly aligned. Before the internal and external splines are properly aligned, the internal current required when the alignment servo drives the limit block tooling mechanism to rotate is relatively small. After the internal and external splines are properly aligned, the resistance encountered when the alignment servo drives the limit block tooling mechanism to rotate will increase, thereby increasing the internal current required. Thus, it is possible to determine whether the internal and external splines are properly aligned.

[0030] Furthermore, in step S2, the reaction force support mechanism lifts the lead screw in the drive nut assembly mechanism upward;

[0031] In step S3, the press mechanism applies preload to abut the internal spline on the limit block in the limit block tooling mechanism against the external spline on the lead screw in the drive nut assembly mechanism;

[0032] In step S4, the swing arm mechanism drives the limiting block in the limiting block tooling mechanism to rotate coaxially;

[0033] In step S7, the press mechanism increases the applied pressure to press the lead screw into the limiting block.

[0034] The beneficial effect of adopting the above-mentioned further solution is that it is beneficial to achieve the alignment and pressing of the screw and the limit block by increasing the pressure applied by the press mechanism after the control mechanism detects that the internal spline on the limit block and the external spline on the lead screw are aligned. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention;

[0036] Figure 2 A schematic diagram of the press mechanism, press head mechanism, alignment servo, swing arm mechanism and limit block tooling mechanism provided in the embodiments of the present invention;

[0037] Figure 3 This is a schematic diagram of the drive nut assembly, reaction support mechanism, and clamping mechanism provided in an embodiment of the present invention.

[0038] Figure 4 This is a schematic diagram of the alignment servo current monitoring provided in an embodiment of the present invention;

[0039] Figure 5 A flowchart of the spline press-fit alignment method provided in an embodiment of the present invention.

[0040] in, Figure 4 The horizontal axis represents time, and the vertical axis represents current. Figure 4 It can be seen that when the inner and outer splines are not yet aligned, the current value is small and fluctuates steadily. After the inner and outer splines are aligned, the current value increases sharply and fluctuates steadily.

[0041] The attached diagram lists the components represented by each number as follows:

[0042] 1. Press mechanism; 2. Press head mechanism; 3. Alignment servo; 4. Swing arm mechanism; 5. Limit block tooling mechanism; 6. Drive nut assembly mechanism; 7. Reaction support mechanism; 8. Clamping mechanism; 9. Frame; 11. Servo press head; 12. Servo press head guide block; 13. Servo press head connecting block; 21. Slider; 22. Connecting column; 23. Slide rail; 24. First fixed plate; 41. Moving fork; 42. Rotating shaft; 43. Swing arm; 51. Limit block; 52. Press head fixing block; 53. Second fixed plate; 61. Lead screw; 62. Nut; 63. Fixed tooling; 64. Positioning sleeve; 71. Base plate; 72. Support frame; 73. Reaction support locking cylinder; 74. Reaction support locking block; 75. Reaction support block; 81. Clamping cylinder; 82. Clamping head. Detailed Implementation

[0043] The principles and features of the present invention are described below. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0044] like Figures 1 to 3 As shown, a spline press-fit alignment device includes: a press mechanism 1, a press head mechanism 2, an alignment servo 3, a swing arm mechanism 4, a limit block tooling mechanism 5, a drive nut assembly mechanism 6, a reaction force support mechanism 7, a clamping mechanism 8, a frame 9, and a control structure; the frame 9 is a C-shaped block structure, the press mechanism 1 is mounted on the top of the frame 9, the press head mechanism 2 and the clamping mechanism 8 are both mounted on the side wall of the frame 9, the top and bottom ends of the press head mechanism 2 are connected to the press mechanism 1 and the limit block tooling mechanism 5 respectively, and the two ends of the swing arm mechanism 4 are connected to the alignment servo 3 and the limit block tooling mechanism 5 respectively. The mechanism is connected to the reaction support mechanism 7, which is installed on the inner wall of the bottom end of the frame 9. The drive nut assembly mechanism 6 is located at the top of the reaction support mechanism 7 and is connected to the clamping mechanism 8. The control mechanism is connected to the alignment servo 3. The internal spline on the limit block tooling mechanism 5 is pressed down by the press mechanism 1 and the press head mechanism 2, and rotates coaxially under the action of the alignment servo 3 and the swing arm mechanism 4. The external spline on the drive nut assembly mechanism 6 is aligned and engaged with the internal spline on the limit block tooling mechanism 5 under the support of the reaction support mechanism 7 and the clamping action of the clamping mechanism 8.

[0045] It should be noted that, in a preferred embodiment of the present invention, the control mechanism, in addition to being connected to the alignment servo 3, can also be connected to the press mechanism 1, the reaction force support mechanism 7, and the clamping mechanism 8 simultaneously, for starting and stopping control and current monitoring of the alignment servo 3, controlling the downward pressure of the servo press head 11 in the press mechanism 1, controlling the reaction force support locking cylinder 73 in the reaction force support mechanism 7, and controlling the clamping cylinder 81 in the clamping mechanism 8.

[0046] The beneficial effects of this invention are as follows: the pressure head mechanism facilitates the transmission of pressure applied by the press mechanism to the limiting block tooling mechanism, thereby causing the internal spline on the limiting block tooling mechanism to abut against the external spline on the drive nut assembly mechanism; the alignment servo and swing arm mechanism facilitate the coaxial rotation of the internal spline on the limiting block tooling mechanism, thereby automatically finding the alignment angle of the internal and external splines, and judging whether the internal and external splines are aligned under the cooperation of the control mechanism; the reaction force support mechanism facilitates the provision of support for the drive nut assembly mechanism under pressure; and the clamping mechanism facilitates the prevention of rotation of the drive nut assembly mechanism, thereby improving the stability during alignment.

[0047] Preferred, such as Figure 1 and Figure 2 As shown, the press mechanism 1 includes: a servo press head 11, a servo press head guide block 12, and a servo press head connecting block 13; the servo press head guide block 12 is installed on the side wall of the frame 9, and the output shaft of the servo press head 11 passes through the servo press head guide block 12 and is coaxially connected with the servo press head connecting block 13.

[0048] The advantages of adopting the above preferred solution are: the servo pressure head is conducive to applying downward pressure, and the pressure is transmitted to the pressure head mechanism and the limit block tooling mechanism through the servo pressure head guide block and the servo pressure head connecting block, so as to realize the downward pressure after alignment.

[0049] Preferred, such as Figure 1 and Figure 2 As shown, the pressure head mechanism 2 includes: a slider 21, a connecting column 22, a slide rail 23, and a first fixing plate 24; the first fixing plate 24 is installed on the side wall of the frame 9, the slide rail 23 is installed on the first fixing plate 24, the slider 21 is slidably installed on the slide rail 23, and the top and bottom ends of the slider 21 are coaxially connected to the servo pressure head connecting block 13 and the connecting column 22 respectively.

[0050] The advantages of adopting the above preferred solution are: the sliding of the slider up and down on the slide rail is conducive to transmitting the downward pressure to the connecting column and then to the limiting block tooling mechanism, so as to realize the downward pressure after alignment.

[0051] Preferred, such as Figure 1 and Figure 2As shown, the limiting block tooling mechanism 5 includes: a limiting block 51, a pressure head fixing block 52, and a second fixing plate 53; the pressure head fixing block 52 is installed on the second fixing plate 53, the bottom end of the connecting column 22 is connected to the top end of the pressure head fixing block 52, the alignment servo 3 is installed on the second fixing plate 53, the pressure head fixing block 52 is sleeved on the upper end of the limiting block 51, the internal spline is set on the bottom end of the limiting block 51, and the two ends of the swing arm mechanism 4 are connected one-to-one with the upper ends of the alignment servo 3 and the limiting block 51. The limiting block 51 is pressed down under the action of the press mechanism 1 and the pressure head mechanism 2, and rotates coaxially under the action of the alignment servo 3 and the swing arm mechanism 4.

[0052] The advantages of adopting the above preferred solution are: the second fixed plate is conducive to realizing the synchronous up and down displacement of the limit block, the alignment servo and the swing arm mechanism, so that after the internal spline on the limit block is pressed down to abut against the external spline on the drive nut assembly mechanism, the limit block can be rotated coaxially.

[0053] Preferred, such as Figure 1 and Figure 2 As shown, the swing arm mechanism 4 includes a moving fork 41, a rotating shaft 42, and a swing arm 43; one end of the moving fork 41 is connected to the output shaft of the alignment servo 3, one end of the swing arm 43 is connected to the upper end of the limiting block 51, and the other end of the moving fork 41 and the other end of the swing arm 43 are hinged to each other through the rotating shaft 42.

[0054] The advantages of adopting the above preferred solution are: the movable fork and the swing arm are hinged by a pivot, which is beneficial to convert the push and pull of the alignment servo output shaft into coaxial rotation of the limit block.

[0055] Preferred, such as Figure 1 and Figure 3 As shown, the reaction support mechanism 7 includes: a base plate 71, a support frame 72, a reaction support locking cylinder 73, a reaction support locking block 74, and a reaction support block 75; the base plate 71 is installed on the inner wall of the bottom end of the frame 9, the support frame 72 is disposed on the base plate 71, the reaction support locking block 74 is a block structure with a wedge-shaped top, the reaction support locking cylinder 73 is installed on the base plate 71 and its output shaft is connected to the reaction support locking block 74, and the reaction support block 75 abuts against the top end of the reaction support locking block 74.

[0056] The advantages of adopting the above preferred solution are: the top of the reaction support locking block is a wedge-shaped block structure, which is conducive to the lifting and lowering of the reaction support block under the pushing and pulling action of the output shaft of the reaction support locking cylinder, thereby realizing the lifting and lowering of the drive nut assembly mechanism, and thus supporting the drive nut assembly mechanism, avoiding damage to the drive nut assembly mechanism under pressure.

[0057] Preferred, such as Figure 1 and Figure 3 As shown, the drive nut assembly mechanism 6 includes: a lead screw 61, a nut 62, a fixing fixture 63, and a positioning sleeve 64; the positioning sleeve 64 is disposed at the top of the support frame 72, the fixing fixture 63 is fixedly installed on the base plate 71, the nut 62 is sleeved on the lead screw 61, the lead screw 61 passes through the fixing fixture 63, the positioning sleeve 64, and the support frame 72, and abuts against the top of the reaction force support block 75, and the external spline is disposed at the top of the lead screw 61.

[0058] It should be noted that in the technical solution of the present invention, in order to show the clamping mechanism 8 and the reaction force support mechanism 7, only a part of the fixing fixture 63 is cut off, but in fact the fixing fixture 63 is fixedly installed on the base plate 71.

[0059] Because the fixing fixture 63 is fixedly installed on the base plate 71, the height of the fixing fixture 63 remains unchanged. However, during the assembly process, the nut 62 abuts against the top of the fixing fixture 63. In order to prevent the nut 62 from being crushed by the fixing fixture 63 under the action of downward pressure, the reaction force support mechanism 7 is required to lift the lead screw 61 and the nut 62 fitted on the lead screw 61 upward a certain distance.

[0060] The advantages of adopting the above preferred solution are: the fixed tooling and positioning sleeve help to limit the lead screw, so that the external spline on the lead screw and the internal spline on the limiting block are coaxial.

[0061] Preferred, such as Figure 1 and Figure 3 As shown, the clamping mechanism 8 includes a clamping cylinder 81 and a clamping head 82; the clamping cylinder 81 is installed on the side wall of the frame 9, and the lead screw 61 is disposed in the middle of the clamping head 82. The clamping head 82 releases the lead screw 61 under the action of the clamping cylinder 81.

[0062] It should be noted that, in the technical solution of the present invention, since the clamping mechanism 8 is prior art, the internal structure of the clamping mechanism 8 is not described in detail.

[0063] The beneficial effect of adopting the above preferred solution is that the clamping head, under the action of the clamping cylinder, helps to loosen the lead screw, thereby preventing the lead screw from rotating during the alignment process.

[0064] like Figure 4 and Figure 5 As shown, a spline press-fit alignment method includes the following steps:

[0065] S1: Install the limit block tooling mechanism 5 below the pressure head mechanism 2, and install the drive nut assembly mechanism 6 on the reaction force support mechanism 7;

[0066] S2: The reaction force support mechanism 7 is used to lift the drive nut assembly mechanism 6 upward a certain distance, and the clamping mechanism 8 is used to clamp the drive nut assembly mechanism 6.

[0067] S3: Press mechanism 1 applies pre-pressure, and uses the transmission action of press head mechanism 2 to press down limit block tooling mechanism 5, swing arm mechanism 4 and alignment servo 3 synchronously until the internal spline on limit block tooling mechanism 5 abuts against the external spline on drive nut assembly mechanism 6.

[0068] S4: Start the alignment servo 3, and use the swing arm mechanism 4 to drive the internal spline on the limit block tooling mechanism 5 to rotate coaxially.

[0069] S5: Use the control mechanism to monitor the current value within the alignment servo 3 in step S4;

[0070] S6: When the control mechanism detects that the current value in the alignment servo 3 has increased to the preset current value, it means that the internal spline on the limit block tooling mechanism 5 has rotated to engage with the external spline on the drive nut assembly mechanism 6, and the spline alignment is completed.

[0071] S7: Turn off the alignment servo 3 and increase the pressure applied by the press mechanism 1 to press the limit block tooling mechanism 5 and the drive nut assembly mechanism 6 together.

[0072] It should be noted that, in a preferred embodiment of the present invention, in step S2, the output shaft of the reaction force support locking cylinder 73 is pushed out, thereby pushing out the reaction force support locking block 74. Since the top end of the reaction force support locking block 74 is a wedge-shaped structure, when the reaction force support locking block 74 is pushed out, the reaction force support block 75 changes from the small diameter end of the wedge-shaped structure to contact the large diameter end, thereby realizing the lifting of the reaction force support block 75, and thus realizing the lifting of the lead screw 61.

[0073] In step S3, the preload only requires that the internal spline on the limiting block 51 and the external spline on the lead screw 61 maintain contact while the limiting block 51 can also rotate; the determination that the internal spline on the limiting block tooling mechanism 5 and the external spline on the drive nut assembly mechanism 6 are in contact can be achieved by the program in the control mechanism determining whether the displacement of the press mechanism 1 has reached the preset value.

[0074] The beneficial effects of this invention are: by monitoring the current value in the alignment servo, it is helpful to determine whether the internal spline on the limit block tooling mechanism and the external spline on the drive nut assembly mechanism are properly aligned. Before the internal and external splines are properly aligned, the internal current required when the alignment servo drives the limit block tooling mechanism to rotate is relatively small. After the internal and external splines are properly aligned, the resistance encountered when the alignment servo drives the limit block tooling mechanism to rotate will increase, thereby increasing the internal current required. Thus, it is possible to determine whether the internal and external splines are properly aligned.

[0075] Preferred, such as Figure 4 and Figure 5 As shown, in step S2, the reaction force support mechanism 7 lifts the lead screw 61 in the drive nut assembly mechanism 6 upward;

[0076] In step S3, the press mechanism 1 applies preload to abut the internal spline on the limit block 51 in the limit block tooling mechanism 5 against the external spline on the lead screw 61 in the drive nut assembly mechanism 6;

[0077] In step S4, the swing arm mechanism 4 drives the limiting block 51 in the limiting block tooling mechanism 5 to rotate coaxially;

[0078] In step S7, the press mechanism 1 increases the applied pressure to press the lead screw 61 into the limiting block 51.

[0079] The advantages of adopting the above preferred solution are: after the control mechanism detects that the internal spline on the limit block and the external spline on the lead screw are aligned, the alignment and pressing of the lead screw and the limit block can be achieved by increasing the pressure applied by the press mechanism.

[0080] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0081] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0082] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0083] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0084] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0085] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A spline press-fit alignment device, characterized in that, include: The press mechanism (1), press head mechanism (2), alignment servo (3), swing arm mechanism (4), limit block tooling mechanism (5), drive nut assembly mechanism (6), reaction force support mechanism (7), clamping mechanism (8), frame (9), and control mechanism; the frame (9) is a C-shaped block structure, the press mechanism (1) is installed on the top of the frame (9), the press head mechanism (2) and the clamping mechanism (8) are both installed on the side wall of the frame (9), and the top of the press head mechanism (2) is... The end and bottom are connected to the press mechanism (1) and the limiting block tooling mechanism (5) respectively. The two ends of the swing arm mechanism (4) are connected to the alignment servo (3) and the limiting block tooling mechanism (5) respectively. The reaction force support mechanism (7) is installed on the inner wall of the bottom end of the frame (9). The drive nut assembly mechanism (6) is set at the top of the reaction force support mechanism (7) and connected to the clamping mechanism (8). The control mechanism is connected to the alignment servo (3). The internal spline on the limiting block tooling mechanism (5) is pressed down by the press mechanism (1) and the press head mechanism (2), and rotates coaxially under the action of the alignment servo (3) and the swing arm mechanism (4). The external spline on the drive nut assembly mechanism (6) is aligned and engaged with the internal spline on the limiting block tooling mechanism (5) under the support of the reaction force support mechanism (7) and the clamping action of the clamping mechanism (8). The press mechanism (1) includes: a servo press head (11), a servo press head guide block (12), and a servo press head connecting block (13); the servo press head guide block (12) is installed on the side wall of the frame (9), and the output shaft of the servo press head (11) passes through the servo press head guide block (12) and is coaxially connected with the servo press head connecting block (13); The pressure head mechanism (2) includes: a slider (21), a connecting column (22), a slide rail (23), and a first fixing plate (24); the first fixing plate (24) is installed on the side wall of the frame (9), the slide rail (23) is installed on the first fixing plate (24), the slider (21) is slidably installed on the slide rail (23), and the top and bottom ends of the slider (21) are coaxially connected to the servo pressure head connecting block (13) and the connecting column (22) respectively. The limiting block tooling mechanism (5) includes: a limiting block (51), a pressure head fixing block (52), and a second fixing plate (53); the pressure head fixing block (52) is installed on the second fixing plate (53), the bottom end of the connecting column (22) is connected to the top end of the pressure head fixing block (52), the alignment servo (3) is installed on the second fixing plate (53), the pressure head fixing block (52) is sleeved on the upper end of the limiting block (51), the internal spline is set on the bottom end of the limiting block (51), the two ends of the swing arm mechanism (4) are connected one-to-one with the upper ends of the alignment servo (3) and the limiting block (51), the limiting block (51) is pressed down under the action of the press mechanism (1) and the pressure head mechanism (2), and rotates coaxially under the action of the alignment servo (3) and the swing arm mechanism (4); The swing arm mechanism (4) includes a moving fork (41), a rotating shaft (42), and a swing arm (43); one end of the moving fork (41) is connected to the output shaft of the alignment servo (3), one end of the swing arm (43) is connected to the upper end of the limiting block (51), and the other end of the moving fork (41) and the other end of the swing arm (43) are hinged through the rotating shaft (42).

2. The spline press-fit alignment device according to claim 1, characterized in that, The reaction support mechanism (7) includes: a base plate (71), a support frame (72), a reaction support locking cylinder (73), a reaction support locking block (74), and a reaction support block (75); the base plate (71) is installed on the inner wall of the bottom end of the frame (9), the support frame (72) is set on the base plate (71), the reaction support locking block (74) is a block structure with a wedge-shaped top, the reaction support locking cylinder (73) is installed on the base plate (71), and the output shaft is connected to the reaction support locking block (74), and the reaction support block (75) abuts against the top of the reaction support locking block (74).

3. The spline press-fit alignment device according to claim 2, characterized in that, The drive nut assembly (6) includes: a lead screw (61), a nut (62), a fixing fixture (63), and a positioning sleeve (64); the positioning sleeve (64) is disposed at the top of the support frame (72), the fixing fixture (63) is fixedly installed on the base plate (71), the nut (62) is sleeved on the lead screw (61), the lead screw (61) passes through the fixing fixture (63), the positioning sleeve (64), and the support frame (72), and abuts against the top of the reaction force support block (75), and the external spline is disposed at the top of the lead screw (61).

4. The spline press-fit alignment device according to claim 3, characterized in that, The clamping mechanism (8) includes a clamping cylinder (81) and a clamping head (82); the clamping cylinder (81) is installed on the side wall of the frame (9), and the lead screw (61) is located in the middle of the clamping head (82). The clamping head (82) releases the lead screw (61) under the action of the clamping cylinder (81).

5. A spline press-fit alignment method, characterized in that, According to any one of claims 1-4, the spline press-fit alignment device includes the following alignment method: S1: Install the limit block tooling mechanism (5) below the pressure head mechanism (2), and install the drive nut assembly mechanism (6) on the reaction force support mechanism (7); S2: The drive nut assembly (6) is lifted upward by the reaction force support mechanism (7) and clamped by the clamping mechanism (8); S3: The press mechanism (1) applies pre-pressure and uses the transmission action of the press head mechanism (2) to press down the limit block tooling mechanism (5), the swing arm mechanism (4) and the alignment servo (3) synchronously until the internal spline on the limit block tooling mechanism (5) abuts against the external spline on the drive nut assembly mechanism (6). S4: Start the alignment servo (3) and use the swing arm mechanism (4) to drive the internal spline on the limit block tooling mechanism (5) to rotate coaxially; S5: Use the control mechanism to monitor the current value in the alignment servo (3) in step S4; S6: When the control mechanism detects that the current value in the alignment servo (3) rises to the preset current value, it indicates that the inner spline on the limit block tooling mechanism (5) rotates to engage with the outer spline on the drive nut assembly mechanism (6), and the spline alignment is completed; S7: Turn off the alignment servo (3) and increase the pressure applied by the press mechanism (1) to press the limit block tooling mechanism (5) and the drive nut assembly mechanism (6) together.

6. The spline press-fit alignment method according to claim 5, characterized in that, In step S2, the reaction force support mechanism (7) lifts the lead screw (61) in the drive nut assembly mechanism (6) upward; In step S3, the press mechanism (1) applies preload to abut the internal spline on the limit block (51) in the limit block tooling mechanism (5) against the external spline on the lead screw (61) in the drive nut assembly mechanism (6); In step S4, the swing arm mechanism (4) drives the limiting block (51) in the limiting block tooling mechanism (5) to rotate coaxially; In step S7, the press mechanism (1) increases the applied pressure and presses the lead screw (61) into the limiting block (51).

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