A multi-rod press-fitting device, system and method

Abstract

This invention relates to the field of press-fitting technology, specifically to a multi-rod press-fitting device, system, and method. The device includes a drive assembly and a press-fitting assembly. The press-fitting assembly includes a housing, multiple press-fitting columns, and multiple support chambers; the drive assembly is driven to the housing; the outer peripheral wall of the housing is recessed to form multiple support chambers; the press-fitting columns are slidably connected to the support chambers; a compressible fluid medium is provided between the support chambers and the press-fitting columns; the working state of the multi-rod press-fitting device includes the press-fitting columns experiencing resistance along a first direction, the drive assembly driving the housing to move along a second direction, and the housing driving the press-fitting columns through the fluid medium, where P1×S<F1; P1 is the initial pressure in the support chamber, S is the cross-sectional area of ​​the press-fitting column, and F1 is the maximum resistance experienced by the press-fitting column along the first direction, which is the direction from the press-fitting column to the housing, and is opposite to the second direction. This solves the problem of easy misalignment when pressing multiple bolts simultaneously.

Description

Technical Field

[0001] This invention relates to the field of press-fitting technology, and more specifically, to a multi-rod press-fitting device, system, and method. Background Technology

[0002] In mechanical assembly processes, pressing bolts axially into the mounting holes of workpieces is one of the core processes for achieving an interference fit between bolts and workpieces and completing the pre-assembly of fasteners. Applying axial pressure to each bolt sequentially to press it into its corresponding mounting hole is a time-consuming process, and its production efficiency is insufficient to meet the needs of batch assembly.

[0003] To improve press-fitting efficiency, a single-drive synchronous press-fitting structure has been developed. During operation, the rigid press-fitting assembly simultaneously abuts against the ends of all bolts to be press-fitted. Under the thrust of the drive device, multiple bolts are pushed synchronously, completing the press-fitting process for all bolts in one go, thus improving production efficiency. However, due to factors such as the machining dimensional errors and geometric tolerances of the workpiece mounting holes, different bolts experience varying axial resistance during press-fitting. When using a rigid press-fitting assembly for synchronous press-fitting, bolts with higher resistance will provide reverse support to the press-fitting assembly, while bolts with lower resistance will feed at a faster speed. This uneven force distribution can cause the rigid press-fitting assembly to skew during the press-fitting process. Summary of the Invention

[0004] To address the problem of misalignment during the simultaneous pressing of multiple bolts, this invention provides a multi-rod pressing device, system, and method.

[0005] In a first aspect, the present invention provides a multi-rod pressing device, the multi-rod pressing device comprising:

[0006] Driver components;

[0007] A press-fitting assembly includes a housing, multiple press-fitting columns, and multiple support chambers; a drive assembly is drivenly connected to the housing; the outer peripheral wall of the housing is recessed to form the multiple support chambers; the press-fitting columns are slidably connected to the support chambers; a compressible fluid medium is provided between the support chambers and the press-fitting columns;

[0008] The working state of the multi-rod pressing device includes the pressing column being subjected to resistance along a first direction, the driving assembly driving the housing to move along a second direction, and the housing being able to drive the pressing column through the fluid medium, P1×S<F1; where P1 is the initial pressure in the support chamber, S is the cross-sectional area of ​​the pressing column, and F1 is the maximum resistance the pressing column is subjected to along the first direction, the first direction being the direction from the pressing column to the housing, and the first direction being opposite to the second direction.

[0009] Optionally, the press assembly further includes a main chamber; the outer shell surrounds and forms the main chamber; a plurality of branch chambers are respectively connected to the main chamber; and the main chamber contains a compressible fluid medium.

[0010] Optionally, the cross-sectional area of ​​the branch chamber is smaller than the cross-sectional area of ​​the main chamber.

[0011] Optionally, the press-fit assembly further includes an elastic part; one end of the elastic part is connected to the press-fit column, and the other end is connected to the inner wall of the housing.

[0012] Optionally, the press-fit column includes a pressure rod and a limiting head; one axial end of the pressure rod is connected to the limiting head;

[0013] The press-fit assembly further includes a mounting part; the outer peripheral wall of the mounting part is connected to the inner peripheral wall of the branch chamber; the mounting part is located on the side of the branch chamber away from the main chamber;

[0014] The pressure rod is disposed within the enclosing space of the mounting part; the limiting head is disposed within the enclosing space of the support chamber; the projection of the limiting head along the second direction coincides with the projection of the mounting part along the second direction; S is the cross-sectional area of ​​the limiting head.

[0015] Optionally, one end of the elastic part is connected to the side of the mounting part near the main chamber, and the other end is connected to the side of the limiting head near the mounting part; the elastic part is sleeved on the outer periphery of the pressure rod.

[0016] Optionally, the drive assembly includes a drive unit and a drive plate; the drive unit is drivenly connected to the drive plate; the drive plate is drivenly connected to the housing; and the projection of the support chamber along the first direction is within the projection range of the drive plate along the first direction.

[0017] In a second aspect, the present invention provides a multi-rod pressing system, the multi-rod pressing system comprising any of the multi-rod pressing devices described in the first aspect, and the multi-rod pressing system further comprising:

[0018] An assembly assembly includes a first assembly unit and a plurality of second assembly units; the first assembly unit includes a plurality of mounting holes and a mounting body; the mounting holes are recessed from one side of the mounting body to the other side; the second assembly units are configured as columnar bodies; the inner diameter of the mounting holes is smaller than at least a portion of the outer diameter of the second assembly units, and the absolute value of the difference between the two is within a set value range;

[0019] The installation state of the multi-rod press-fit system includes the drive assembly, the press-fit column, at least part of the second assembly unit, and the mounting hole arranged sequentially along the second direction. The second assembly unit abuts against the press-fit column, and the drive assembly drives the housing to move along the second direction, where P1×S<F1.

[0020] Thirdly, the present invention provides a multi-rod press-fitting method, wherein the multi-rod press-fitting method is applied to the multi-rod press-fitting system described in the second aspect, and the multi-rod press-fitting method includes:

[0021] The assembly component positioning is completed; wherein, the positioning completion includes the drive component, the press-fit column, at least part of the second assembly unit, and the mounting hole being arranged sequentially along the axial direction of the press-fit column, the press-fit column abutting against the second assembly unit, and P1×S<F1;

[0022] The drive assembly drives the housing to move along the second direction; wherein the press-fitting column moves relative to the housing along the first direction;

[0023] Based on the outer shell moving to P0×S=F1, the press-fitting column, the outer shell, and the second assembly unit move synchronously along the second direction; wherein, P0 is the current pressure inside the support chamber;

[0024] Once the second assembly unit has moved to the point where it is installed with the mounting hole, the drive component stops driving.

[0025] Optionally, the press-fit assembly further includes a main chamber; the outer shell surrounds and forms the main chamber; a plurality of branch chambers are respectively connected to the main chamber; and the main chamber contains a compressible fluid medium;

[0026] The multi-rod press-fitting method further includes:

[0027] Based on the driving component driving the housing to move along the second direction to P2×S<F2 and P3×S≥F3, the first setting of the pressing column moves relative to the housing towards the main chamber and the second setting of the pressing column moves relative to the housing away from the main chamber; wherein, P2 is the current pressure in the branch chamber surrounding the first setting of the pressing column, F2 is the maximum resistance experienced by the first setting of the pressing column along the first direction; P3 is the current pressure in the branch chamber surrounding the second setting of the pressing column, and F3 is the maximum resistance experienced by the second setting of the pressing column along the first direction.

[0028] To solve the problem of easy misalignment when pressing multiple bolts simultaneously, this invention has the following advantages:

[0029] The drive assembly is connected to the housing of the pressing assembly. Multiple support chambers are formed by recesses in the outer peripheral wall of the housing, allowing the pressing columns to slide between the support chambers. A compressible fluid medium is placed between the support chambers and the pressing columns. A parameter relationship is set such that the product of the initial pressure in the support chamber and the cross-sectional area of ​​the pressing column is less than the maximum resistance experienced by the pressing column along the first direction. This allows the housing to transmit pressing driving force to each pressing column through the fluid medium when the drive assembly moves the housing along the second direction. When the resistance experienced by each pressing column along the first direction is inconsistent, the compressible fluid medium can deform to allow each pressing column to move differently relative to the housing. This allows each pressing column to adaptively adjust its relative position according to the resistance it receives, ensuring that each pressing column can abut against the corresponding part to be pressed. This avoids misalignment between the housing and the drive assembly due to uneven force, ultimately solving the problem of part misalignment caused by resistance differences during simultaneous pressing of multiple parts. This improves pressing efficiency while ensuring pressing assembly accuracy. Attached Figure Description

[0030] Figure 1 A cross-sectional schematic diagram of a multi-rod press-fit device according to one embodiment is shown;

[0031] Figure 2 A schematic diagram of a multi-rod press-fit device according to one embodiment is shown;

[0032] Figure 3 A schematic diagram of a multi-bar press-fitting system according to one embodiment is shown;

[0033] Figure 4 A schematic diagram of a multi-rod press-fitting method according to one embodiment is shown.

[0034] Reference numerals: 10, drive assembly; 11, drive section; 12, drive plate; 20, press-fit assembly; 21, outer shell; 22, press-fit column; 221, pressure rod; 222, limiting head; 23, main chamber; 24, branch chamber; 25, elastic section; 26, mounting section; 30, assembly assembly; 31, first assembly unit; 311, mounting body; 32, second assembly unit; 321, head; 322, rod section. Detailed Implementation

[0035] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, and are not intended to imply any limitation on the scope of the disclosure.

[0036] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the terms "installed", "set up", "equipped with", "connected", and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0037] In the bolt press-fit assembly process, due to the processing errors of the workpiece to be press-fitted and the bolt itself, the resistance experienced by each bolt during the press-fitting process varies. Existing multi-rod press-fitting devices often employ a rigid connection structure for the press-fitting assembly 20, where multiple press-fitting columns 22 move synchronously with the outer shell 21. When the bolt press-fitting resistance corresponding to different press-fitting columns 22 is inconsistent, the press-fitting assembly 20 as a whole will tilt due to uneven force at each press-fitting point. This, in turn, causes the corresponding press-fitting columns 22 to tilt, ultimately resulting in the bolts being pressed out of alignment. This fails to guarantee the verticality and assembly accuracy of each bolt, reducing the processing qualification rate of the press-fitting process and making it difficult to reliably meet the batch production requirements for synchronous press-fitting of multiple bolts.

[0038] Example 1:

[0039] This embodiment discloses a multi-rod pressing device, such as... Figure 1, Figure 2 As shown, the multi-rod pressing device includes: a drive assembly 10 and a pressing assembly 20;

[0040] Drive component 10 can be used to drive press assembly 20 to move according to a predetermined program;

[0041] The press assembly 20 includes a housing 21, multiple press columns 22, and multiple support chambers 24; the drive assembly 10 is drivenly connected to the housing 21; the outer peripheral wall of the housing 21 is recessed to form multiple support chambers 24; the press columns 22 are slidably connected to the support chambers 24, so that the press columns 22 can slide along their own axis; a compressible fluid medium is provided between the support chambers 24 and the press columns 22;

[0042] The multi-rod pressing device operates as follows: the end of the pressing column 22 furthest from the housing 21 abuts against the circumferential end of the bolt, thus experiencing resistance along a first direction; the driving assembly 10 drives the housing 21 to move along a second direction; the housing 21 can drive the pressing column 22 via a fluid medium; P1×S<F1; where P1 is the initial pressure in the support chamber 24, S is the cross-sectional area of ​​the pressing column 22, and F1 is the maximum resistance experienced by the pressing column 22 along the first direction, which is the direction from the pressing column 22 to the housing 21, and is opposite to the second direction; for example... Figure 1 As shown, the first direction can be from bottom to top, and the second direction can be from top to bottom;

[0043] The drive assembly 10 drives the housing 21 to move along the second direction until the end of the press-fitting column 22 away from the housing 21 abuts against the circumferential end of the bolt. The press-fitting column 22 moves relative to the housing 21 along the first direction, at which time the fluid medium is compressed. As the housing 21 continues to move along the second direction, the pressure in the support chamber 24 gradually increases. When the product of the pressure in the support chamber 24 and the cross-sectional area of ​​the press-fitting column 22 equals the maximum resistance experienced by the press-fitting column 22 along the first direction, the press-fitting column 22 and the housing 21 are relatively stationary, so that the press-fitting column 22 can press the bolt along the second direction.

[0044] When the resistance to movement of each bolt in the second direction is inconsistent, the compressible fluid medium allows the pressure-fitting column 22 to move at different strokes relative to the housing 21. This allows the pressure-fitting column 22 to adapt to the resistance of each bolt through the compressible fluid medium, ensuring that each pressure-fitting column 22 abuts against its corresponding bolt even when the strokes of movement of each pressure-fitting column 22 relative to the housing 21 are inconsistent. This configuration prevents misalignment of the housing 21 and the drive assembly 10 (e.g., Figure 1 As shown, the deflection can be that the top of the housing 21 and the drive assembly 10 moves radially relative to their bottom, thereby improving the pressing efficiency while preventing the pressing column 22 from pressing the bolts to a deflection.

[0045] Furthermore, such as Figure 1As shown, the press-fit assembly 20 also includes a main chamber 23; the outer shell 21 surrounds and forms the main chamber 23; multiple branch chambers 24 are respectively connected to the main chamber 23; the main chamber 23 and the branch chambers 24 are respectively provided with compressible fluid media; when the stroke of each press-fit column 22 relative to the outer shell 21 is different, the pressure of each branch chamber 24 is different, and the main chamber 23 can make the pressure in each branch chamber 24 balance each other, thereby further preventing the press-fit column 22 from press the bolt to the side.

[0046] Furthermore, such as Figure 1 As shown, the cross-sectional area of ​​the branch chamber 24 is smaller than that of the main chamber 23, resulting in less resistance to the fluid medium moving from the branch chamber 24 towards the main chamber 23. When a bolt cannot be assembled with the mounting hole due to manufacturing errors or positioning errors during the bolt pressing process, the bolt experiences greater resistance along the first direction. This allows the fluid medium in the branch chamber 24 corresponding to the bolt to flow rapidly towards the main chamber 23, thereby avoiding the application of greater pressure to the bolt and causing damage to the bolt and its corresponding mounting hole.

[0047] Furthermore, such as Figure 1 As shown, the press-fit assembly 20 also includes an elastic part 25; one end of the elastic part 25 is connected to the press-fit column 22, and the other end is connected to the inner wall of the housing 21.

[0048] When a bolt is in an abnormal state, it experiences greater resistance along the first direction. The fluid medium in the corresponding branch chamber 24 flows through the main chamber 23 to other branch chambers 24. The pressing column 22 in the other branch chambers 24 experiences increased driving force along the second direction. The elastic part 25 applies a force along the first direction to the pressing column 22. The driving force in the second direction and the force in the first direction can partially cancel each other out, thereby preventing the pressing column 22 in the other branch chambers 24 from applying excessive pressure to the bolt, and thus preventing damage or misalignment of the bolt during the pressing process.

[0049] Furthermore, such as Figure 1 As shown, the press-fit column 22 includes a press rod 221 and a limiting head 222; one axial end of the press rod 221 is connected to the limiting head 222.

[0050] The press-fit assembly 20 also includes a mounting part 26; the outer peripheral wall of the mounting part 26 is connected to the inner peripheral wall of the branch chamber 24; the mounting part 26 is located on the side of the branch chamber 24 away from the main chamber 23;

[0051] The pressure rod 221 is disposed within the enclosing space of the mounting portion 26; the limiting head 222 is disposed within the enclosing space of the support chamber 24, and the outer peripheral wall of the limiting head 222 is slidably connected to the inner peripheral wall of the support chamber 24; the projection of the limiting head 222 along the second direction coincides with the projection of the mounting portion 26 along the second direction; S is the cross-sectional area of ​​the limiting head 222 along its own axis.

[0052] The end of the pressure rod 221 away from the limiting head 222 is used to press the bolt. The limiting head 222 abuts against the mounting part 26 to prevent the pressure rod 221 from separating from the outer shell 21.

[0053] Furthermore, such as Figure 1 As shown, one end of the elastic part 25 is connected to the side of the mounting part 26 near the main chamber 23, and the other end is connected to the side of the limiting head 222 near the mounting part 26. The elastic part 25 is sleeved on the outer periphery of the pressure rod 221. With this arrangement, the space in the support chamber 24 can be fully utilized, and there is no need to set up additional components to connect the outer shell 21 and the elastic part 25. The elastic part 25 can be used to prevent some bolts from being subjected to excessive force along the second direction and deflected during the pressing of the bolts by the pressure rod 221.

[0054] Furthermore, such as Figure 3 As shown, the drive assembly 10 includes a drive unit 11 and a drive plate 12. The drive unit 11 can be a motor, a cylinder, or a hydraulic cylinder. The drive unit 11 is drivenly connected to the drive plate 12. The drive plate 12 is drivenly connected to the housing 21. The projection of the support chamber 24 along the first direction is within the projection range of the drive plate 12 along the first direction. With this configuration, the driving force of the drive unit 11 is distributed as evenly as possible to the fluid medium in each support chamber 24 through the drive plate 12, thereby making the force applied to the bolt by each pressing column 22 as similar as possible, and ultimately preventing the bolt from deviating during the pressing process.

[0055] Example 2:

[0056] This embodiment provides a multi-rod pressing system, which includes any of the multi-rod pressing devices described in Embodiment 1, such as... Figure 3 As shown, the multi-bar press-fitting system also includes:

[0057] Assembly component 30 includes a first assembly unit 31 and a plurality of second assembly units 32; the first assembly unit 31 includes a plurality of mounting holes and a mounting body 311; the mounting holes are recessed from one side of the mounting body 311 to the other side; the second assembly units 32 are configured as columnar bodies such as bolts and pins, and the number of second assembly units 32 can be set to correspond to the number of press-fitting columns 22; the inner diameter of the mounting hole is smaller than the outer diameter of at least a portion of the second assembly units 32, and the absolute value of the difference between the inner diameter of the mounting hole and the outer diameter of at least a portion of the second assembly units 32 is within a set value range, which can be 0.001 to 0.003 times the outer diameter of the second assembly unit 32; after the first assembly unit 31 and the second assembly units 32 are assembled, the second assembly units 32 can be interference-fitted with the mounting holes;

[0058] The installation state of the multi-rod press-fitting system includes a drive assembly 10, a press-fitting column 22, at least part of a second assembly unit 32, and mounting holes arranged sequentially along a second direction. The end of the second assembly unit 32 away from the mounting hole abuts against the end of the press-fitting column 22 away from the housing 21. The drive assembly 10 drives the housing 21 to move along the second direction. The fluid medium inside the housing 21 drives the second assembly unit 32 to move along the second direction through the press-fitting column 22. P1×S<F1;

[0059] When the resistance encountered by each second assembly unit 32 during its movement along the second direction is inconsistent, the compressible fluid medium allows each pressing column 22 to have a different travel distance relative to the housing 21. This enables each pressing column 22 to adaptively adapt to the resistance of each second assembly unit 32 through the compressibility deformation characteristics of the compressible fluid medium. With this structure, the housing 21 and the drive assembly 10 can be prevented from being misaligned, thereby improving the pressing efficiency and preventing the pressing column 22 from pressing the second assembly unit 32 into an skewed state.

[0060] Furthermore, such as Figure 1 As shown, the second assembly unit 32 includes a head 321 and a rod 322; the head 321 is connected to the outer peripheral wall of the rod 322; the press-fitting column 22 can abut against the head 321, thereby driving the rod 322 to move along the second direction; after the rod 322 is assembled with the mounting hole, the head 321 can abut against the mounting body 311, thereby maintaining the relative position of the rod 322 and the mounting hole.

[0061] Example 3:

[0062] This embodiment provides a multi-rod press-fitting method, which is applied to a multi-rod press-fitting system in Embodiment 2, such as... Figure 4 As shown, the multi-rod pressing method includes steps S10 to S40; each step will be described in detail below:

[0063] Step S10: The positioning of assembly component 30 is completed; wherein, the positioning is completed includes the drive component 10, the press-fit column 22, at least part of the second assembly unit 32, and the mounting hole is arranged sequentially along the axial direction of the press-fit column 22, the press-fit column 22 abuts against the second assembly unit 32, and P1×S<F1.

[0064] In step S20, the drive assembly 10 drives the housing 21 to move along the second direction; wherein, the press-fit column 22 moves relative to the housing 21 along the first direction; after the press-fit column 22 abuts against the second assembly unit 32, the pressure inside the support chamber 24 is small, and the press-fit column 22 is abutted by the second assembly unit 32, thereby moving relative to the housing 21 along the first direction, at which time the fluid medium is compressed.

[0065] In step S30, based on the outer shell 21 moving to P0×S=F1, the press-fitting column 22, the outer shell 21, and the second assembly unit 32 move synchronously along the second direction; where P0 is the current pressure in the support chamber 24; when the pressure in the support chamber 24 increases, the relative positions of the press-fitting column 22 and the outer shell 21 remain stationary, so that the outer shell 21 drives the press-fitting column 22 through the fluid medium, so that the press-fitting column 22 pushes the second assembly unit 32 to move relative to the first assembly unit 31 along the second direction, so that the first assembly unit 31 and the second assembly unit 32 are assembled together.

[0066] Step S40: Based on the second assembly unit 32 moving to the point where the second assembly unit 32 and the mounting hole are installed, the drive assembly 10 stops driving;

[0067] The compressible fluid medium provides displacement compensation, allowing each pressing column 22 to have a differentiated feed stroke relative to the housing 21. When the resistance of each second assembly unit 32 is inconsistent during its movement along the second direction, each pressing column 22 can adaptively adjust to the resistance of each second assembly unit 32 by utilizing the compressibility and deformation characteristics of the compressible fluid medium. This structure prevents the housing 21 from misaligning with the drive assembly 10, improving pressing efficiency while effectively preventing the pressing columns 22 from misaligning the second assembly units 32 during pressing.

[0068] Furthermore, such as Figure 1 As shown, the press assembly 20 also includes a main chamber 23; the outer shell 21 surrounds and forms the main chamber 23; multiple branch chambers 24 are respectively connected to the main chamber 23; and a compressible fluid medium is provided inside the main chamber 23.

[0069] Multi-rod press-fitting methods also include:

[0070] Based on the drive assembly 10 driving the housing 21 to move along the second direction to P2×S<F2 and P3×S≥F3, the first set press-fitting column 22 moves relative to the housing 21 toward the main chamber 23 and the second set press-fitting column 22 moves relative to the housing 21 toward the direction away from the main chamber 23; wherein, P2 is the current pressure in the branch chamber 24 surrounding the first set press-fitting column 22, F2 is the maximum resistance applied by the second assembly unit 32 to the first set press-fitting column 22 along the first direction; P3 is the current pressure in the branch chamber 24 surrounding the second set press-fitting column 22, and F3 is the maximum resistance applied by the second assembly unit 32 to the second set press-fitting column 22 along the first direction;

[0071] At this time, the resistance to the movement of the second assembly unit 32 against the first setting press column 22 in the second direction is small, while the resistance to the movement of the second assembly unit 32 against the second setting press column 22 in the second direction is large. The first setting press column 22 moves the fluid medium in its corresponding branch chamber 24 to the main chamber 23, and the fluid medium in the main chamber 23 moves to the main chamber 23 corresponding to the second setting press column 22. This allows each press column 22 to adaptively adjust the stroke of the relative movement between the press column 22 and the outer shell 21 for its corresponding second assembly unit 32, avoiding the situation where the outer shell 21 is tilted, causing the second assembly unit 32 to be pressed into a tilt.

[0072] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes can be made in form and detail without departing from the scope of this disclosure.

Claims

1. A multi-rod pressing device, characterized in that, The multi-rod pressing device includes: Driver components; A press-fitting assembly includes a housing, multiple press-fitting columns, and multiple support chambers; a drive assembly is drivenly connected to the housing; the outer peripheral wall of the housing is recessed to form the multiple support chambers; the press-fitting columns are slidably connected to the support chambers; a compressible fluid medium is provided between the support chambers and the press-fitting columns; The working state of the multi-rod pressing device includes the pressing column being subjected to resistance along a first direction, the driving assembly driving the housing to move along a second direction, and the housing being able to drive the pressing column through the fluid medium, P1×S<F1; where P1 is the initial pressure in the support chamber, S is the cross-sectional area of ​​the pressing column, and F1 is the maximum resistance the pressing column is subjected to along the first direction, the first direction being the direction from the pressing column to the housing, and the first direction being opposite to the second direction.

2. The multi-rod pressing device according to claim 1, characterized in that, The press-fit assembly further includes a main chamber; the outer shell surrounds and forms the main chamber; a plurality of branch chambers are respectively connected to the main chamber; the main chamber contains a compressible fluid medium.

3. The multi-rod pressing device according to claim 2, characterized in that, The cross-sectional area of ​​the branch chamber is smaller than that of the main chamber.

4. The multi-rod pressing device according to claim 2, characterized in that, The press-fit assembly also includes an elastic part; one end of the elastic part is connected to the press-fit column, and the other end is connected to the inner wall of the housing.

5. A multi-rod pressing device according to claim 4, characterized in that, The press-fit column includes a pressure rod and a limiting head; one axial end of the pressure rod is connected to the limiting head; The press-fit assembly further includes a mounting part; the outer peripheral wall of the mounting part is connected to the inner peripheral wall of the branch chamber; the mounting part is located on the side of the branch chamber away from the main chamber; The pressure rod is disposed within the enclosing space of the mounting part; the limiting head is disposed within the enclosing space of the support chamber; the projection of the limiting head along the second direction coincides with the projection of the mounting part along the second direction; S is the cross-sectional area of ​​the limiting head.

6. A multi-rod pressing device according to claim 5, characterized in that, One end of the elastic part is connected to the side of the mounting part near the main chamber, and the other end is connected to the side of the limiting head near the mounting part; the elastic part is sleeved on the outer periphery of the pressure rod.

7. A multi-rod pressing device according to claim 6, characterized in that, The drive assembly includes a drive unit and a drive plate; the drive unit is drivenly connected to the drive plate; the drive plate is drivenly connected to the housing; the projection of the support chamber along a first direction is within the projection range of the drive plate along the first direction.

8. A multi-bar press-fitting system, characterized in that, The multi-rod pressing system includes a multi-rod pressing device as described in any one of claims 1-7, and the multi-rod pressing system further includes: An assembly assembly includes a first assembly unit and a plurality of second assembly units; the first assembly unit includes a plurality of mounting holes and a mounting body; the mounting holes are recessed from one side of the mounting body to the other side; the second assembly units are configured as columnar bodies; the inner diameter of the mounting holes is smaller than at least a portion of the outer diameter of the second assembly units, and the absolute value of the difference between the two is within a set value range; The installation state of the multi-rod press-fit system includes the drive assembly, the press-fit column, at least part of the second assembly unit, and the mounting hole arranged sequentially along the second direction. The second assembly unit abuts against the press-fit column, and the drive assembly drives the housing to move along the second direction, where P1×S<F1.

9. A multi-rod press-fitting method, characterized in that, The multi-rod press-fitting method is applied to the multi-rod press-fitting system described in claim 8, and the multi-rod press-fitting method includes: The assembly component positioning is completed; wherein, the positioning completion includes the drive component, the press-fit column, at least part of the second assembly unit, and the mounting hole being arranged sequentially along the axial direction of the press-fit column, the press-fit column abutting against the second assembly unit, and P1×S<F1; The drive assembly drives the housing to move along the second direction; wherein the press-fitting column moves relative to the housing along the first direction; Based on the outer shell moving to P0×S=F1, the press-fitting column, the outer shell, and the second assembly unit move synchronously along the second direction; wherein, P0 is the current pressure inside the support chamber; Once the second assembly unit has moved to the point where it is installed with the mounting hole, the drive component stops driving.

10. A multi-rod pressing method according to claim 9, characterized in that, The press-fit assembly further includes a main chamber; the outer shell surrounds and forms the main chamber; the plurality of branch chambers are respectively connected to the main chamber; The main chamber is provided with the compressible fluid medium; The multi-rod press-fitting method further includes: Based on the drive component driving the housing to move along the second direction to P2×S<F2 and P3×S≥F3, the first setting of the press-fitting column moves relative to the housing towards the main chamber and the second setting of the press-fitting column moves relative to the housing away from the main chamber; wherein, P2 is the current pressure in the branch chamber surrounding the first setting of the press-fitting column, F2 is the maximum resistance experienced by the first setting of the press-fitting column along the first direction; P3 is the current pressure in the branch chamber surrounding the second setting of the press-fitting column, and F3 is the maximum resistance experienced by the second setting of the press-fitting column along the first direction.

Images