A thrust rod rubber bushing press head and press device

Abstract

The present invention discloses a thrust rod rubber bushing press-fitting head and a press-fitting device, wherein the thrust rod rubber bushing press-fitting head comprises a pin shaft part, a press head elastic part cooperatedly installed on the pin shaft part shaft, a press head gasket cooperatedly installed on the pin shaft part shaft and located on the upper part of the press head elastic part, and a press head fixedly installed on one end of the pin shaft part away from the press head gasket; the thrust rod rubber bushing press-fitting device comprises a lower die base for placing the thrust rod and an upper die base in contact with a press machine; the present invention installs a press head part inside the upper die base, so that the upper die base can simultaneously press down the rubber bushing and the thrust rod when performing the downward pressing action, and pressing down the rubber bushing and the thrust rod at the same time can reduce the force on the upper end cover of the rubber bushing, thereby reducing the deformation of the upper end cover, thereby solving the technical problems that the upper end cover is prone to turning over and tilting when the rubber bushing of the thrust rod assembly is press-fitted, and the end cover has potential failure and rupture due to internal damage caused by turning over of the upper end cover of the rubber bushing during press-fitting.

Description

Technical Field

[0001] The invention relates to a press-fitting tool, in particular to a thrust rod rubber bushing press-fitting head and a press-fitting device. Background Art

[0002] Thrust rods are key force transmission components in commercial vehicle chassis systems. They transmit traction, braking, lateral forces, and corresponding reaction torques between the vehicle frame and axle, maintaining a stable axle position and ensuring a defined kinematic relationship between the wheels and the vehicle body, resulting in optimal vehicle dynamic characteristics. Rubber offers advantages such as shock absorption and energy storage, as well as high dynamic and static stiffness. Thrust rods primarily utilize rubber bushings.

[0003] Rubber bushings are often press-fitted onto the shaft of the thrust rod. Currently, existing press-fit devices often apply excessive force to the rubber bushing, causing the end cap flange to lift. This can cause the retaining ring to become stuck or unable to fit properly, requiring on-site rework and bushing replacement and re-press-fit, severely impacting assembly efficiency. Furthermore, there is a potential risk of end cap failure after-sales service due to internal damage to the end cap flange during press-fitting, leading to cracking and failure. Summary of the Invention

[0004] The purpose of the present invention is to provide a thrust rod rubber bushing press-fitting head and a press-fitting device, aiming to solve some disadvantages existing in the process of pressing the rubber bushing into the thrust shaft in the prior art. It is often the case that excessive force is applied to the rubber bushing, resulting in the end cover flange being lifted up, causing the retaining ring assembly to be stuck or unable to be assembled into place, requiring rework on the assembly site, replacing the bushing and re-pressing it, which seriously affects the assembly efficiency. There is also a technical problem that the end cover flange is internally damaged during press-fitting, resulting in the risk of end cover rupture and potential failure.

[0005] In order to solve the above problems, the present invention provides a thrust rod rubber bushing press-fitting head and a press-fitting device, comprising:

[0006] A pin shaft, which is the main shaft of the thrust rod rubber bushing press-fitting head;

[0007] A pressure head elastic member is installed on the shaft of the pin member with a clearance fit;

[0008] A pressure head gasket is installed on the shaft of the pin member with a clearance fit, and one side of the pressure head gasket is in contact with the pressure head elastic member;

[0009] A pressure head pressing block is fixed to the shaft end of the pin shaft away from the pressure head gasket.

[0010] The surface of the pin member close to the pressing head pressing block is provided with a threaded hole for fixing and installing the pressing head pressing block.

[0011] The pin shaft is a hollow shaft.

[0012] The pin shaft is a T-shaped pin shaft, and is further provided with a side limiting plate and a bottom plate of the pin shaft to form an accommodating cavity for installing the pressure head elastic member.

[0013] The lower die seat is used to place the thrust rod and the upper die seat contacts the press.

[0014] The lower die base is fixed at a preset position on the work surface and is provided with a workpiece accommodating groove for accommodating one end of the thrust rod.

[0015] The upper die base includes an upper die base top block in contact with the press, an upper die base bottom block in contact with the upper end cover of the rubber bushing, a guide column connecting the upper die base top block and the upper die base bottom block, and a guide column elastic member sleeved on the guide column shaft.

[0016] The upper die seat is provided with a press head accommodating groove for accommodating the thrust rod rubber bushing press-fitting press head, and axial limit screws for implementing axial limiting function for the thrust rod rubber bushing press-fitting press head are provided on both sides of the upper die seat bottom block.

[0017] The pin shaft is installed in a clearance-matched manner with the inner wall of the pressure head accommodating groove.

[0018] The pressure head gasket is clearance-matched with the inner wall of the pressure head accommodating groove.

[0019] Beneficial effects:

[0020] The present invention installs a pressing head component inside the upper mold base, so that the upper mold base can press down the rubber bushing and the thrust rod at the same time when performing the downward pressing action. Pressing down the rubber bushing and the thrust rod at the same time can reduce the force on the upper end cover of the rubber bushing, thereby reducing the deformation of the upper end cover, thereby solving the technical problems that the upper end cover is prone to turning over and lifting when the rubber bushing of the thrust rod assembly is press-fitted, and the end cover has the potential to fail and rupture due to internal damage caused by turning over of the upper end cover of the rubber bushing during press-fitting. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 A schematic structural diagram of a thrust rod rubber bushing press-fitting head provided by an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of a mechanism for a thrust rod rubber bushing press-fitting device provided by an embodiment of the present invention;

[0024] Figure 3 This is a force analysis diagram of the rubber bushing when the press-fitting device is not equipped with a thrust rod rubber bushing press head;

[0025] Figure 4 This is a force analysis diagram of the rubber bushing when the press-fitting device is equipped with a thrust rod rubber bushing press head.

[0026] The technical features marked in the accompanying drawings are as follows:

[0027] 1. Upper die base; 11. Upper die base top block; 12. Upper die base bottom block; 13. Guide post; 14. Guide post elastic part; 2. Thrust rod rubber bushing press-fitting head; 21. Pin shaft; 22. Press head elastic part; 23. Press head gasket; 24. Press head pressure block; 25. Side limit plate; 26. Pin shaft bottom plate; 3. Thrust rod; 4. Axial limit screw; 5. Rubber bushing upper end cover; 6. Lower die base; 7. Workpiece receiving groove; 8. Press head receiving groove. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] The present invention provides a thrust rod rubber bushing press-fitting head and a press-fitting device. The thrust rod rubber bushing press-fitting head includes a pin shaft member 21, a press head elastic member 22 cooperatedly installed on the shaft of the pin shaft member 21, a press head gasket 23 cooperatedly installed on the shaft of the pin shaft member 21 and located above the press head elastic member 22, and a press head 24 fixedly installed on the end of the pin shaft member 21 away from the press head gasket 23; the thrust rod rubber bushing press-fitting device includes a lower die base 6 for placing the thrust rod and an upper die base 1 in contact with the press.

[0030] Among them, the upper die base 1 includes an upper die base top block 11 in contact with the press, an upper die base bottom block 12 in contact with the upper end cover 5 of the rubber bushing, a guide column 13 connecting the upper die base top block 11 and the upper die base bottom block 12, and a guide column elastic member 14 sleeved on the axis of the guide column 13. The lower die base 6 is fixed at a preset position on the working platform.

[0031] Furthermore, the upper die base 1 is provided with a press head receiving groove 8 for accommodating the thrust rod rubber bushing press-fitting press head 2, and axial limit screws 4 for implementing an axial limiting function for the thrust rod rubber bushing press-fitting press head 2 are provided on both sides of the upper die base bottom block 12; the lower die base 6 is provided with a workpiece receiving groove 7 for accommodating one end of the thrust rod 3.

[0032] The pin shaft 21 is the main shaft of the thrust rod rubber bushing press-fitting pressure head 1 , and the pin shaft 21 is installed with clearance fit in the inner wall of the pressure head receiving groove 8 .

[0033] The pressure head gasket 23 is installed with a clearance fit on the shaft of the pin shaft 21. One side of the pressure head gasket 23 contacts the pressure head elastic part 22, and the side of the pressure head gasket 23 away from the pressure head elastic part 22 contacts the upper die seat top block 11. The pressure head gasket 23 is used to evenly transfer the force applied by the upper die seat top block 11 to the pressure head elastic part 22.

[0034] The ram elastic member 22 is installed on the shaft of the pin shaft member 21 with a clearance fit. The ram elastic member 22 is used to transmit the implementation force of the upper die seat top block 11 to the thrust rod 3. The ram elastic member 22 can convert the force applied by the upper die seat top block 11 into the elastic potential energy of the ram elastic member 22 and the thrust on the thrust rod 3, thereby reducing the relative displacement and relative implementation force between the thrust rod 3 and the upper end cover 5 of the rubber bushing, thereby reducing the internal force on the upper end cover 5 of the rubber bushing and reducing the deformation generated.

[0035] The pressure head block 24 is fixedly mounted on the axial end of the pin shaft 21 away from the pressure head gasket 23. The pressure head block 24 is in direct contact with the thrust rod 3. The pressure head block 24 is fixed to the axial end of the pin shaft 21 away from the pressure head gasket 23 by a threaded connection. The pressure head block 24 is replaceable to be suitable for pressing thrust rods of different sizes.

[0036] Furthermore, the pin member 21 is a T-shaped pin member, and a side limiting plate 25 is further provided on the outer side thereof. The side limiting plate 25 and the pin member bottom plate 26 form an accommodating cavity for installing the pressure head elastic member 22.

[0037] Furthermore, the pin shaft 21 is a hollow shaft, which is used to connect the cavity between the pin shaft 21 and the pressure head receiving groove 8 with the outside world, ensuring that the internal and external atmospheric pressures are consistent, thereby facilitating the replacement of press-fit pressure heads of different sizes to accommodate thrust rods of different sizes.

[0038] Furthermore, axial limit screws 4 are provided on both sides of the upper die base bottom block 12 for implementing an axial limiting function on the thrust rod rubber bushing press-fitting head 2. The axial limit screws 4 are used to prevent the thrust rod rubber bushing press-fitting head from falling out of the head accommodating cavity 8 when replacing the workpiece.

[0039] During operation, the press applies force to the upper die block 11, and the upper die block 11 moves downward. The force exerted on the upper die block 11 is transmitted to the upper die bottom block 12 through the guide column 13 and the guide column elastic member 14. The upper die bottom block 12 directly applies force to the upper end cover 5 of the rubber bushing. The upper die block 11 moves downward to a certain position, and the ram gasket 23 contacts the upper die block 11. The ram gasket 23 transmits force to the ram pressure block 24 through the ram elastic member 22. The ram pressure block 24 directly applies force to the thrust rod 3 to press the thrust rod 3 downward until the pressing action is completed. The upper die base 1 is lifted, and the pressed thrust rod 3 is taken out to complete the entire pressing process.

[0040] contrast Figure 3 and Figure 4 , Figure 3 F1 is the external pressure on the rubber bushing. Figure 4 Where F2 is the external pressure on the rubber bushing, and F3 is the external pressure on the thrust rod. From the force analysis, the external pressures are consistent, so F1+F1=F2+F2+F3. It can be concluded that F1>F2. It can be concluded that the installation of a thrust rod rubber bushing press-fitting head provided by the present invention can reduce the external force received by the upper end cover 5 of the rubber bushing, thereby reducing the elastic deformation of the rubber bushing during the press-fitting process.

[0041] Comparative Implementation 1

[0042] Referring to the rubber bushing pressing device disclosed in CN201471128U, it is characterized in that it includes a base plate, a positioning ring is provided at one end of the base plate, a sleeve coaxial with the positioning ring is provided at the other end, a shaft sleeve is provided in the sleeve, a screw is provided in the shaft sleeve, and shaft shoulders are provided at the corresponding ends of the screw and the positioning ring, the shaft sleeve and the screw are connected by a key, a clamping block is provided on the shaft sleeve, a nut is provided in the clamping block, and the nut is connected to the screw in cooperation.

[0043] Utility model CN201471128U provides a clamping mechanism for fixing, but does not propose a technical solution to the technical problem that the upper end cover is prone to turning over and tilting when the rubber bushing of the thrust rod assembly is press-fitted.

[0044] Comparative Implementation 2

[0045] Referring to the rubber bushing pressing equipment disclosed in CN103831607A, it is characterized in that it includes a lower clamp for fixing a workpiece, an upper clamp cooperating with the lower clamp and arranged above the lower clamp, the upper clamp includes a pre-pressing piece facing the lower clamp and capable of abutting against the workpiece, the pre-pressing piece includes a rod body facing the workpiece and capable of extending and retracting up and down, and a pre-pressing end arranged at the end of the rod body and capable of abutting against the workpiece.

[0046] Invention CN103831607A provides a lower clamp for fixing the workpiece and an upper clamp for clamping, but also fails to provide an effective technical solution to the technical problem that the upper end cover is prone to turning over and lifting when the rubber bushing of the thrust rod assembly is press-fitted.

[0047] In summary, the thrust rod rubber bushing press-fitting head and press-fitting device provided by the present invention can solve the technical problems that the upper end cover of the thrust rod assembly is easily turned over and lifted during press-fitting, and the end cover has the potential to fail and rupture due to internal damage caused by turning over the upper end cover of the rubber bushing during press-fitting.

[0048] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

[0049] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0050] It should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the technical product is usually placed when in use. They are only for the convenience of describing the present technology and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present technology. In addition, "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. Therefore, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0051] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0052] In the description of this technology, it should also be noted that, unless otherwise specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this technology based on the specific circumstances.

Claims

1. A thrust rod rubber bushing press-fitting head, characterized in that: include: A pin shaft (21) is the main shaft of the thrust rod rubber bushing press-fitting pressure head (2); a pressure head elastic member (22) is installed on the shaft of the pin shaft (21) with a clearance fit; a pressure head gasket (23) is installed on the shaft of the pin shaft (21) with a clearance fit, and one side of the pressure head gasket (23) is in contact with the pressure head elastic member (22); a pressure head pressure block (24) is fixed to the shaft end of the pin shaft (21) away from the pressure head gasket (23); the pin shaft (21) is a T-shaped pin shaft, and is also provided with a side limit plate (25) and a pin shaft bottom plate (26) to form an accommodating cavity for installing the pressure head elastic member (22).

2. The thrust rod rubber bushing press-fitting head according to claim 1, characterized in that: A threaded hole for fixing and installing the pressure head pressing block (24) is provided on the surface of the pin shaft (21) close to the pressure head pressing block (24).

3. The thrust rod rubber bushing press-fitting head according to claim 1, characterized in that: The pin shaft (21) is a hollow shaft.

4. A thrust rod rubber bushing press-fitting device, characterized in that: It comprises a thrust rod rubber bushing press-fitting head (2) as claimed in claim 1, a lower die base (6) for placing a thrust rod (3), and an upper die base (1) in contact with a press machine, wherein the thrust rod rubber bushing press-fitting head (2) is arranged at the lower end of the upper die base (1).

5. The thrust rod rubber bushing press-fitting device according to claim 4, characterized in that: The lower die base (6) is fixed at a preset position on the work surface and is provided with a workpiece receiving groove (7) for receiving one end of the thrust rod (3).

6. The thrust rod rubber bushing press-fitting device according to claim 4, characterized in that: The upper die base (1) further comprises an upper die base top block (11) in contact with the press, an upper die base bottom block (12) in contact with the upper end cover (5) of the rubber bushing, a guide post (13) connecting the upper die base top block (11) and the upper die base bottom block (12), and a guide post elastic member (14) sleeved on the shaft of the guide post (13).

7. The thrust rod rubber bushing press-fitting device according to claim 4, characterized in that: The upper die seat (1) is provided with a press head receiving groove (8) for receiving the thrust rod rubber bushing press head (2), and axial limit screws (4) for implementing an axial limit function for the thrust rod rubber bushing press head (2) are also provided on both sides of the upper die seat bottom block (12).

8. The thrust rod rubber bushing press-fitting head according to claim 1, characterized in that: The pin shaft (21) is installed in a clearance-matched manner with the inner wall of the pressure head receiving groove (8).

9. The thrust rod rubber bushing press-fitting head according to claim 1, characterized in that: The pressure head gasket (23) is clearance-matched with the inner wall of the pressure head accommodating groove (8).

Images