Auxiliary frame bushing press-fitting equipment and using method thereof

Abstract

The auxiliary frame lining press-fitting equipment comprises a supporting platform, a press-fitting mechanism and a position adjusting mechanism are installed on the supporting platform, the press-fitting mechanism comprises a supporting elevator, and a supporting base and a supporting support are installed on the side, close to the position adjusting mechanism, of the supporting elevator. A supporting sleeve and a supporting backing ring are installed in the middle of the upper surface of the supporting base, a plurality of sets of distance measuring probes are installed on the supporting sleeve, the array axis of each set of distance measuring probes is coaxial with the supporting sleeve, an upper positioning rod is installed on the supporting support, and the position of each inner lifting sliding table is controlled through a multi-axis sliding table. The auxiliary frame press-fitting device flexibly adapts to the appearance structures of different auxiliary frames, accurate detection of the supporting sleeve and the distance measuring probe is utilized, so that the vibration reduction lining strictly moves in the axial direction during press-fitting, it is strictly ensured that the periphery of the vibration reduction lining is subjected to evenly-distributed friction force, accidental shear force and damage to part of the vibration reduction lining are avoided, and the service life of the vibration reduction lining is prolonged. And the assembly accuracy and the assembly quality are improved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile manufacturing equipment, in particular to a subframe bushing press-fitting device and a use method thereof. Background Art

[0002] The vehicle subframe is used to connect the vehicle body and suspension. Bushings are provided at the mounting points of the subframe and the vehicle body. The subframe and the vehicle body are connected through the bushings. The bushings can buffer vibrations. The bushings and the subframe are fitted with interference to meet the requirements of the bushing press force. Common interference fit technologies are almost always achieved through the use of a manual press and press tooling.

[0003] The application document with publication number CN113977229A discloses a subframe bushing press-fitting tooling shared by multiple vehicle models, including a vertical press and a subframe support assembly, wherein the subframe support assembly is positioned on a workbench of the vertical press and is located at the lower side of a pressing device of the vertical press; the subframe support assembly includes a sliding plate, a slewing bearing and a turntable, wherein the sliding plate is connected to the workbench via two sets of mutually parallel linear guide slider assemblies, and the turntable is connected to the upper end surface of the sliding plate via a slewing bearing; the turntable is respectively provided with a subframe positioning assembly for model A, a subframe positioning assembly for model B and a subframe positioning assembly for model C; the subframe support assembly is also provided with a press-fitting point locking mechanism, a roof locking mechanism and a press-fitting point supporting device.

[0004] According to the above patents and prior art, the following questions are obtained:

[0005] Problem 1: Because it is not considered that the axis lines of the mounting holes of the subframe are not all parallel and vertical, the above device is prone to damage the side wall of the bushing due to deviation in the pressure direction during actual assembly;

[0006] Problem 2: Because the radial elastic reaction force generated by the bushing during press-fitting due to its own elasticity is not taken into account, the above device is prone to cause the bushing to shake during press-fitting, resulting in damage and press-fitting failure;

[0007] Question three: The bushing of the above-mentioned device can only be suspended on the pressing equipment through friction through interference fit with the mounting rod. When the pressing equipment is separated from the bushing, the bushing is pressurized inward due to the pressure of the subframe, so that the bushing will be lifted up by the mounting rod of the pressing equipment, resulting in the bushing not being pressed accurately and being prone to falling out. Summary of the invention

[0008] The purpose of the present invention is to provide a subframe bushing press-fitting device and a method of using the same in order to address the above-mentioned problems and deficiencies, thereby improving overall work efficiency.

[0009] The present invention solves at least one of the following technical problems:

[0010] (1) The above device is prone to damage the side wall of the bushing due to deviation in the pressure direction during actual press-fitting;

[0011] (2) The bushing shakes during press fitting, causing damage and press fitting failure;

[0012] (3) The bushing cannot be pressed in accurately and tends to come out.

[0013] The objective of the present invention can be achieved through the following technical scheme: a subframe bushing press-fitting device, comprising a support platform, on which a press-fitting mechanism and a positioning mechanism are respectively installed, the press-fitting mechanism comprises a support elevator, on the side of the support elevator close to the positioning mechanism, a support base and a support bracket are respectively installed, a support sleeve and a support gasket ring are respectively installed in the middle of the upper surface of the support base, a plurality of groups of ranging probes are installed on the support sleeve, the array axis line of each group of ranging probes is coaxial with the support sleeve, and an upper positioning rod is installed on the support bracket.

[0014] As a further scheme of the invention, a hydraulic press is buried on one side of the top of the supporting bracket, the telescopic end of the hydraulic press is vertically downward and is installed with a first transmission plate, a transmission sleeve is installed at the lower part of the first transmission plate, a second transmission plate is installed at the lower part of the transmission sleeve, a first slide is installed at the upper part of the second transmission plate, a third transmission plate is installed at the movable end of the first slide, an upper positioning rod is installed on the third transmission plate, and the upper positioning rod moves through the middle part of the second transmission plate.

[0015] As a further scheme of the invention, a supporting top ring is installed at the lower part of the second transmission plate, the upper positioning rod, the supporting top ring and the supporting sleeve are coaxial, the supporting gasket ring is arranged on the outside of the supporting sleeve and is coaxial with the supporting sleeve, a second slide is buried on the inner side of the middle part of the supporting bracket, a limiting top plate is installed on the movable end of the second slide, a through hole is opened in the middle part of the limiting top plate, and the through hole of the limiting top plate is coaxial with the supporting top ring.

[0016] As a further scheme of the invention, a cylindrical cavity is opened in the middle of the support base, and a lower positioning rod is installed at the axis center of the cylindrical cavity. The lower positioning rod passes through the supporting sleeve and is slidably connected with it. A reset spring is sleeved on the outer side of the lower positioning rod, and the top of the reset spring is fixedly connected to the supporting sleeve. The top of the lower positioning rod and the lower end of the upper positioning rod are provided with corresponding clamping blocks and clamping grooves.

[0017] As a further solution of the invention, when the support sleeve is pressed into the cylindrical cavity by the vibration-damping bushing, the outer periphery of the lower positioning rod still maintains a uniform gap with the inner surface of the mounting hole groove of the vibration-damping bushing.

[0018] As a further solution of the invention, the outer diameter of the support sleeve is smaller than the inner diameter of the auxiliary frame mounting sleeve, and the inner periphery of the support sleeve is slidably sleeved with the lower positioning rod.

[0019] As a further scheme of the invention, the positioning mechanism includes a single-axis slide, which is embedded in the middle part of one end of the support platform. A lifting push rod is installed on the movable end of the single-axis slide, and a stepper motor is installed on the telescopic end of the lifting push rod. The end of the rotating shaft of the stepper motor is sequentially installed with a lower support plate, an elastic support pad and an upper support plate from bottom to top. A plurality of telescopic rods are passed through the outer peripheral edge of the upper support plate, the telescopic rod is fixedly connected to the upper support plate, and the telescopic end of the telescopic rod is fixedly connected to the lower support plate. The plurality of telescopic rods are evenly distributed in a circular array.

[0020] As a further solution of the invention, a first adjustment frame, a second adjustment frame and a support adjustment plate are respectively installed in the middle of the upper surface of the upper support plate, the second adjustment frame is located in the first adjustment frame, the support adjustment plate is located in the second adjustment frame, the support adjustment plate is limited by the second adjustment frame and slides along a horizontal uniaxial direction, the second adjustment frame is limited by the first adjustment frame and slides along a horizontal uniaxial direction, and the sliding directions of the second adjustment frame and the support adjustment plate are perpendicular to each other.

[0021] As a further scheme of the invention, a multi-axis slide is installed in the middle part of the upper surface of the support and adjustment plate, and the rotating axes of the multi-axis slide are evenly distributed at equal angles. An inner lifting slide is installed on each movable end of the multi-axis slide, and the outer side of the inner lifting slide is fixedly connected to an outer lifting slide. A lower clamp is installed on the movable end of the inner lifting slide, and an upper clamp is installed on the movable end of the outer lifting slide.

[0022] A method for using a subframe bushing press-fitting device comprises the following steps:

[0023] Step 1: lift the support bracket by a support lift to create a gap between the upper positioning rod and the support sleeve, then install the vibration-damping bushing by sleeve-fitting the upper positioning rod, and position the vibration-damping bushing by the friction force between the upper positioning rod and the vibration-damping bushing;

[0024] Step 2: The positions of the corresponding lower clamps are adjusted through the inner lifting slide to support the sub-frame, so that the sub-frame remains horizontal after rough adjustment. The upper clamps cooperate with the lower clamps to form multiple clamping limits, so that the sub-frame remains in a stable horizontal position. The sub-frame is clamped and positioned, and the sub-frame is rotated by a stepper motor to point each mounting sleeve to the press-fitting mechanism in turn. Then, the mounting sleeve is adjusted by moving the single-axis slide so that the mounting sleeve is exactly between the upper positioning rod and the lower positioning rod, so that the sleeve mounting position of the sub-frame is coaxial with the upper positioning rod. Then, the positioning mechanism moves the sub-frame downward so that the sleeve mounting position of the sub-frame is sleeved on the outer periphery of the supporting sleeve.

[0025] Step 3: Use each set of distance measuring probes to measure and locate the sleeve installation position of the sub-frame, so as to obtain the data that needs to be fine-tuned for the sub-frame, and then adjust the axis centerline offset angle of the upper support plate through the different extension and contraction sizes of each telescopic rod, so that the axis centerline of the sleeve at the installation position of the sub-frame is parallel to the axis centerline of the support sleeve. After adjusting the axis centerline angle, the first adjustment frame and the second adjustment frame are used to accurately fine-tune the position of the support adjustment plate in an orthogonal axial direction, and then the clamped sub-frame is fine-tuned, so that the axis centerline of the sleeve at the installation position of the sub-frame is accurately coaxial with the lower positioning rod;

[0026] Step 4: The hydraulic press presses down the vibration damping bushing, and moves up the positioning rod through the first slide to pull it out of the mounting hole groove of the vibration damping bushing. When the support sleeve is pressed into the cylindrical cavity by the vibration damping bushing, the outer periphery of the lower positioning rod still maintains a uniform gap with the inner surface of the mounting hole groove of the vibration damping bushing, and the vibration damping bushing is accurately pressed into the sleeve mounting position of the subframe;

[0027] Step 5: First move the support bracket upward, then move the upper positioning rod downward through the first slide, then extend the lifting push rod to raise the sub-frame until the press-fitted vibration damping bushing is separated from the support sleeve, and then the stepper motor rotates the sub-frame to prepare the next installation position sleeve and the corresponding vibration damping bushing;

[0028] Step 6: Repeat the above steps until all the sleeves of the subframe that need to be pressed are pressed, then release the clamping of the subframe and press-fit other subframes in sequence.

[0029] Beneficial effects of the present invention:

[0030] (1) During operation, the sleeve installation position of the sub-frame is measured and positioned by each set of distance measuring probes, so as to obtain the data that needs to be fine-tuned for the sub-frame, including but not limited to the offset angle, direction and distance of the axis centerline of the sleeve installation position of the sub-frame relative to the axis centerline of the lower positioning rod. Then, the positioning mechanism fine-tunes the sub-frame, so that the sleeve installation position of the sub-frame is accurately coaxial with the upper positioning rod. Then, the hydraulic press presses down the vibration damping bushing, and accurately presses the vibration damping bushing into the sleeve installation position of the sub-frame. By using the accurate detection of the support sleeve and the distance measuring probe, the vibration damping bushing is strictly moved along the axial direction during press-fitting, so as to strictly ensure that the outer periphery of the vibration damping bushing is subjected to uniformly distributed friction, avoid the generation of unexpected shear force and damage to part of the vibration damping bushing, and improve the assembly accuracy and assembly quality;

[0031] (2) The vibration damping bushing and the upper positioning rod are moved downward by the hydraulic press, so that the lower end of the upper positioning rod is clamped with the upper end of the lower positioning rod, and then the hydraulic press continues to move the vibration damping bushing downward to press the vibration damping bushing into the mounting sleeve of the sub-frame. At the same time, the first slide moves up the positioning rod, so that the upper positioning rod moves upward relative to the vibration damping bushing but remains stationary relative to the lower positioning rod. As the vibration damping bushing is pressed in, the support sleeve moves downward into the cylindrical cavity, thereby ensuring that the vibration damping bushing is strictly pressed into the mounting sleeve of the sub-frame along the axial direction and vertically, and facilitating the smooth separation of the upper positioning rod from the vibration damping bushing in the interference fit, and the vibration damping bushing always maintains a gap with the lower positioning rod to avoid affecting the interference fit between the vibration damping bushing and the sub-frame;

[0032] (3) When working, the positions of each inner lifting slide are controlled by the multi-axis slide, and the external structures of different sub-frames are flexibly adapted. The positions of each corresponding lower clamping jaw are adjusted by the inner lifting slide to support the sub-frame, so that the sub-frame remains horizontal after rough adjustment. The upper clamping jaw cooperates with the lower clamping jaw to form multiple clamping limits, so that the sub-frame can stably maintain a horizontal position;

[0033] (4) During operation, the axis centerline offset angle of the upper support plate is adjusted by the different extension and contraction sizes of each telescopic rod, so that the axis centerline of the mounting sleeve of the sub-frame is parallel to the axis centerline of the support sleeve. The elasticity and support of the elastic support pad enable the upper support plate to both fine-tune the axis centerline angle and support the upper support plate after adjustment. After adjusting the axis centerline angle, the position of the support adjustment plate is fine-tuned accurately in an orthogonal axial direction through the first adjustment frame and the second adjustment frame, and then the clamped sub-frame is fine-tuned, so that the axis centerline of the mounting sleeve of the sub-frame is accurately coaxial with the lower positioning rod, thereby achieving the overall accurate coaxiality of the upper positioning rod, the vibration damping bushing, the mounting sleeve of the sub-frame, the support sleeve and the lower positioning rod from top to bottom, avoiding any offset of the vibration damping bushing during the press-fitting process, reducing the influence of the press-fitting process on the pressing force effect of the vibration damping bushing, and ensuring the yield rate of the overall process. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0035] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0036] Figure 2 It is a side view of the local structure of the press-fitting mechanism of the present invention;

[0037] Figure 3 It is a side view of the local structure of the press-fitting mechanism of the present invention in step one;

[0038] Figure 4It is a side view of the local structure of the press-fitting mechanism of the present invention in step 2;

[0039] Figure 5 It is a side view of the local structure of the press-fitting mechanism of the present invention in step three;

[0040] Figure 6 It is a side view of the partial structure of the press-fitting mechanism of the present invention in step 4;

[0041] Figure 7 It is a side view of the partial structure of the press-fitting mechanism of the present invention in step five;

[0042] Figure 8 It is a schematic diagram of the internal structure of the transmission sleeve of the present invention;

[0043] Fig. 9 It is a schematic diagram of the overall structure of the positioning mechanism of the present invention;

[0044] In the figure: 101, support platform; 102, press-fitting mechanism; 103, adjustment mechanism; 201, support elevator; 202, support base; 203, support sleeve; 204, distance measuring probe; 205, cylindrical cavity; 206, lower positioning rod; 207, return spring; 208, support pad ring; 209, hydraulic press; 210, first transmission plate; 211, transmission sleeve; 212, second transmission plate; 213, first slide; 214, third transmission plate; 215, upper positioning rod; 216, support top ring; 217 , second slide; 218, limit top plate; 219, support bracket; 301, single-axis slide; 302, lifting push rod; 303, stepping motor; 304, lower support plate; 305, elastic support pad; 306, upper support plate; 307, telescopic rod; 308, first adjustment frame; 309, second adjustment frame; 310, support adjustment plate; 311, multi-axis slide; 312, inner lifting slide; 313, lower clamp; 314, outer lifting slide; 315, upper clamp; 901, subframe; 902, vibration damping bushing. DETAILED DESCRIPTION

[0045] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0046] See also Figure 1-9As shown: a subframe bushing press-fitting device, comprising a support platform 101, on which a press-fitting mechanism 102 and a positioning mechanism 103 are respectively installed, the press-fitting mechanism 102 comprises a support lift 201, the support lift 201 is fixedly installed on one side of the support platform 101, and a support base 202 and a support bracket 219 are respectively installed on the side of the support lift 201 close to the positioning mechanism 103, the support base 202 is fixed in the middle of the support lift 201, and the support bracket 219 is supported by the support base 202. The driving of the support lift 201 moves up and down in the vertical direction. A support sleeve 203 and a support pad ring 208 are respectively installed in the middle of the upper surface of the support base 202. The support pad ring 208 is arranged on the outside of the support sleeve 203 and is coaxial with the support sleeve 203. A plurality of groups of ranging probes 204 are installed on the support sleeve 203. Each group of ranging probes 204 is evenly distributed in a circular array, and the array axis of each group of ranging probes 204 is coaxial with the support sleeve 203. A top side of the support bracket 219 is buried There is a hydraulic press 209, the telescopic end of the hydraulic press 209 is vertically downward and is installed with a first transmission plate 210, a transmission sleeve 211 is installed at the lower part of the first transmission plate 210, a second transmission plate 212 is installed at the lower part of the transmission sleeve 211, a first slide 213 is installed at the upper part of the second transmission plate 212, a third transmission plate 214 is installed at the movable end of the first slide 213, a plurality of first slides 213 are arranged and are evenly distributed in a circular array with the third transmission plate 214 as the center, and the third transmission plate 214 An upper positioning rod 215 is installed in the middle of the second transmission plate 212, and the upper positioning rod 215 movably passes through the middle of the second transmission plate 212. A supporting top ring 216 is installed at the lower part of the second transmission plate 212. The upper positioning rod 215, the supporting top ring 216 and the supporting sleeve 203 are coaxial. A second slide 217 is buried inside the middle of the supporting bracket 219. A limited top plate 218 is installed at the movable end of the second slide 217. A through hole is opened in the middle of the limited top plate 218, and the through hole of the limited top plate 218 is coaxial with the supporting top ring 216.

[0047] The support bracket 219 is lifted by the support lift 201, so that a distance is generated between the upper positioning rod 215 and the support sleeve 203, and then the vibration-damping bushing 902 is installed by sleeve-engaging the upper positioning rod 215, and the vibration-damping bushing 902 is positioned by the friction force between the upper positioning rod 215 and the vibration-damping bushing 902, and the vibration-damping bushing 902 is coaxial with the upper positioning rod 215, and then the sub-frame 901 is clamped and positioned by the adjustment mechanism 103, and the sleeve installation position on the sub-frame 901 is moved to the middle of the press-fitting mechanism 102, so that the sleeve installation position of the sub-frame 901 is coaxial with the upper positioning rod 215, and then the adjustment mechanism 103 moves the sub-frame 901 downward, so that the sleeve installation position of the sub-frame 901 is sleeved on the outer periphery of the support sleeve 203, and the sleeve installation position of the sub-frame 901 is measured by each group of distance measuring probes 204. The distance positioning is performed, thereby obtaining the data that needs to be fine-tuned for the sub-frame 901, including but not limited to the offset angle, direction and distance of the axis centerline of the sleeve installation position of the sub-frame 901 relative to the axis centerline of the lower positioning rod 206. The positioning mechanism 103 then fine-tunes the sub-frame 901, so that the sleeve installation position of the sub-frame 901 is accurately coaxial with the upper positioning rod 215. The hydraulic press 209 then presses down the vibration-damping bushing 902, and accurately presses the vibration-damping bushing 902 into the sleeve installation position of the sub-frame 901. The accurate detection of the support sleeve 203 and the distance measuring probe 204 is utilized, so that the vibration-damping bushing 902 is strictly moved axially during press-fitting, thereby strictly ensuring that the outer periphery of the vibration-damping bushing 902 is subjected to uniformly distributed friction, avoiding unexpected shearing force and partial damage to the vibration-damping bushing 902, and improving assembly accuracy and assembly quality.

[0048] A cylindrical cavity 205 is provided in the middle of the support base 202, and a lower positioning rod 206 is installed at the axis of the cylindrical cavity 205. The lower positioning rod 206 penetrates the support sleeve 203 and is slidably connected thereto. A return spring 207 is sleeved on the outer side of the lower positioning rod 206, and the top of the return spring 207 is fixedly connected to the support sleeve 203. The top of the lower positioning rod 206 and the lower end of the upper positioning rod 215 are both provided with corresponding clamping blocks and clamping grooves.

[0049] The vibration-damping bushing 902 and the mounting sleeve of the sub-frame 901 are in interference fit, and the vibration-damping bushing 902 is clamped on the upper positioning rod 215 by interference fit. The upper positioning rod 215 is moved upward by the first slide 213 so as to be pulled out from the mounting hole groove of the vibration-damping bushing 902. When the support sleeve 203 is pressed into the cylindrical cavity 205 by the vibration-damping bushing 902, the outer periphery of the lower positioning rod 206 still maintains a uniform gap with the inner surface of the mounting hole groove of the vibration-damping bushing 902. The outer periphery diameter of the support sleeve 203 is smaller than the inner periphery diameter of the mounting sleeve of the sub-frame 901, and the inner periphery of the support sleeve 203 is slidably sleeved with the lower positioning rod 206.

[0050] When the present embodiment is working, after the inner circumference of the mounting sleeve of the sub-frame 901 is determined to be coaxial with the lower positioning rod 206 through the detection of each group of distance measuring probes 204, the sub-frame 901 is first moved downward by the positioning mechanism 103, so that the bottom of the mounting sleeve of the sub-frame 901 abuts against the support pad ring 208, and then the support bracket 219 is moved downward by the support elevator 201, and the vibration-damping bushing 902 and the upper positioning rod 215 are moved downward by the hydraulic press 209, so that the lower end of the upper positioning rod 215 is clamped with the upper end of the lower positioning rod 206, and then the hydraulic press 209 continues to move the vibration-damping bushing 902 downward to press the vibration-damping bushing 902 into the mounting sleeve of the sub-frame 901, and at the same time the first slide 2 13. The upper positioning rod 215 is moved upward, so that the upper positioning rod 215 moves upward relative to the vibration damping bushing 902 but remains stationary relative to the lower positioning rod 206. The support sleeve 203 moves downward to the cylindrical cavity 205 as the vibration damping bushing 902 is pressed in. This ensures that the vibration damping bushing 902 is strictly pressed into the mounting sleeve of the sub-frame 901 along the axial direction and vertically, and facilitates the upper positioning rod 215 to be smoothly separated from the vibration damping bushing 902 in the interference fit. The vibration damping bushing 902 always maintains a gap with the lower positioning rod 206. The vibration damping bushing 902 is completely kept in axial movement by the upper positioning rod 215, thereby avoiding affecting the interference fit between the vibration damping bushing 902 and the sub-frame 901.

[0051] The positioning mechanism 103 includes a single-axis slide 301, which is embedded in the middle of one end of the support platform 101. A lifting push rod 302 is installed on the movable end of the single-axis slide 301, and a stepping motor 303 is installed on the telescopic end of the lifting push rod 302. A lower support plate 304, an elastic support pad 305 and an upper support plate 306 are installed on the end of the rotating shaft of the stepping motor 303 from bottom to top. A plurality of telescopic rods 307 are penetrated on the outer peripheral edge of the upper support plate 306. The telescopic rods 307 are fixedly connected to the upper support plate 306, and the telescopic ends of the telescopic rods 307 are fixedly connected to the lower support plate 304. The plurality of telescopic rods 307 are evenly distributed in a ring array.

[0052] A first adjustment frame 308, a second adjustment frame 309 and a support adjustment plate 310 are respectively installed in the middle of the upper surface of the upper support plate 306. The second adjustment frame 309 is located in the first adjustment frame 308, and the support adjustment plate 310 is located in the second adjustment frame 309. The support adjustment plate 310 is limited by the second adjustment frame 309 and slides along a horizontal uniaxial direction. The second adjustment frame 309 is limited by the first adjustment frame 308 and slides along a horizontal uniaxial direction. The sliding directions of the second adjustment frame 309 and the support adjustment plate 310 are perpendicular to each other.

[0053] A multi-axis slide 311 is installed in the middle of the upper surface of the support adjustment plate 310, and the rotating axes of the multi-axis slide 311 are evenly distributed at equal angles. An inner lifting slide 312 is installed on each movable end of the multi-axis slide 311, and an outer lifting slide 314 is fixedly connected to the outer side of the inner lifting slide 312. A lower clamp 313 is installed on the movable end of the inner lifting slide 312, and an upper clamp 315 is installed on the movable end of the outer lifting slide 314;

[0054] When the present embodiment is working, the positions of the inner lifting slides 312 are controlled by the multi-axis slide 311, and the external structures of different sub-frames 901 are flexibly adapted. The positions of the corresponding lower clamps 313 are adjusted by the inner lifting slides 312 to support the sub-frame 901, so that the sub-frame 901 remains horizontal after rough adjustment. The upper clamps 315 cooperate with the lower clamps 313 to form multiple clamping limits, so that the sub-frame 901 remains stably in a horizontal position.

[0055] When adjusting the deviation angle of the axis of the mounting sleeve of the sub-frame 901, the axis deviation angle of the upper support plate 306 is adjusted by different extension and contraction sizes of each telescopic rod 307, so that the axis of the mounting sleeve of the sub-frame 901 is parallel to the axis of the support sleeve 203, and the elasticity and support of the elastic support pad 305 enable the upper support plate 306 to both fine-tune the axis angle and support the upper support plate 306 after adjustment. After adjusting the axis angle, the first adjustment frame 308 and the second adjustment frame 309 are orthogonal to each other in the axial direction. The position of the support adjustment plate 310 is finely and accurately adjusted, and then the clamped sub-frame 901 is finely adjusted, so that the axis of the mounting sleeve of the sub-frame 901 is accurately coaxial with the lower positioning rod 206, and the upper positioning rod 215, the vibration-damping bushing 902, the mounting sleeve of the sub-frame 901, the support sleeve 203, and the lower positioning rod 206 are accurately coaxial from top to bottom, avoiding any deviation of the vibration-damping bushing 902 during the press-fitting process, reducing the influence of the press-fitting process on the pressing force effect of the vibration-damping bushing 902, and ensuring the yield rate of the overall process;

[0056] When the vibration damping bushing 902 is pressed onto the mounting sleeves at each end of the sub-frame 901, the sub-frame 901 is rotated by the stepper motor 303, and each mounting sleeve is sequentially directed toward the pressing mechanism 102, and then the mounting sleeve is moved and adjusted by the single-axis slide 301 so that the mounting sleeve is exactly between the upper positioning rod 215 and the lower positioning rod 206, so that it is suitable for sub-frames 901 of various structures.

[0057] A method for using a subframe bushing press-fitting device comprises the following steps:

[0058] Step 1: The support bracket 219 is lifted by the support lift 201 to create a gap between the upper positioning rod 215 and the support sleeve 203, and then the vibration-damping bushing 902 is installed by sleeve-fitting the upper positioning rod 215, and the vibration-damping bushing 902 is positioned by the friction force between the upper positioning rod 215 and the vibration-damping bushing 902;

[0059] Step 2: The positions of the corresponding lower clamping jaws 313 are adjusted by the inner lifting slide 312 to support the sub-frame 901, so that the sub-frame 901 remains horizontal after rough adjustment. The upper clamping jaws 315 cooperate with the lower clamping jaws 313 to form multiple clamping limits, so that the sub-frame 901 remains in a stable horizontal position, and the sub-frame 901 is clamped and positioned. The sub-frame 901 is rotated by the stepper motor 303, and each installation position sleeve is sequentially directed to the press-fitting mechanism 102, and then the installation position sleeve is adjusted by the movement of the single-axis slide 301 so that the installation position sleeve is just between the upper positioning rod 215 and the lower positioning rod 206, so that the sleeve installation position of the sub-frame 901 is coaxial with the upper positioning rod 215, and then the positioning mechanism 103 moves the sub-frame 901 downward so that the sleeve installation position of the sub-frame 901 is sleeved on the outer periphery of the support sleeve 203;

[0060] Step 3: The sleeve installation position of the sub-frame 901 is measured and positioned by each set of distance measuring probes 204, so as to obtain the data that needs to be fine-tuned for the sub-frame 901, and then the axis centerline offset angle of the upper support plate 306 is adjusted by different extension and contraction sizes of each telescopic rod 307, so that the axis centerline of the sleeve at the installation position of the sub-frame 901 is parallel to the axis centerline of the support sleeve 203. After adjusting the axis centerline angle, the position of the support adjustment plate 310 is fine-tuned accurately in an orthogonal axial direction by the first adjustment frame 308 and the second adjustment frame 309, and then the clamped sub-frame 901 is fine-tuned, so that the axis centerline of the sleeve at the installation position of the sub-frame 901 is accurately coaxial with the lower positioning rod 206;

[0061] Step 4: The hydraulic press 209 presses down the vibration-damping bushing 902, and moves the upper positioning rod 215 upward through the first slide 213 so as to extract it from the mounting hole groove of the vibration-damping bushing 902. When the support sleeve 203 is pressed into the cylindrical cavity 205 by the vibration-damping bushing 902, the outer periphery of the lower positioning rod 206 still maintains a uniform gap with the inner surface of the mounting hole groove of the vibration-damping bushing 902, and the vibration-damping bushing 902 is accurately pressed into the sleeve mounting position of the sub-frame 901.

[0062] Step 5: first move the support bracket 219 upward, then move the upper positioning rod 215 downward through the first slide 213, then extend the lifting push rod 302, and raise the sub-frame 901 until the press-fitted vibration-damping bushing 902 is separated from the support sleeve 203, and then the stepper motor 303 rotates the sub-frame 901, so that the next installation position sleeve and the corresponding vibration-damping bushing 902 are ready;

[0063] Step 6: Repeat the above steps until all the sleeves of the mounting positions of the sub-frame 901 that need to be pressed are pressed, then release the clamping of the sub-frame 901 and press-fit other sub-frames 901 in sequence.

[0064] When the present invention is in use, the staff measures and locates the sleeve installation position of the sub-frame 901 through each group of distance measuring probes 204, so as to obtain the data that needs to be fine-tuned for the sub-frame 901, including but not limited to the offset angle, direction and distance of the axis centerline of the sleeve installation position of the sub-frame 901 relative to the axis centerline of the lower positioning rod 206, and then the positioning mechanism 103 fine-tunes the sub-frame 901, so that the sleeve installation position of the sub-frame 901 is accurately coaxial with the upper positioning rod 215, and then the hydraulic press 209 presses down the vibration-damping bushing 902, and accurately presses the vibration-damping bushing 902 into the sleeve installation position of the sub-frame 901, and utilizes the accurate detection of the support sleeve 203 and the distance measuring probe 204, so that the vibration-damping bushing 902 is strictly moved axially during press-fitting, thereby strictly ensuring that the outer periphery of the vibration-damping bushing 902 is subjected to uniformly distributed friction, avoiding the generation of unexpected shear force and partial damage to the vibration-damping bushing 902, and improving the assembly accuracy and assembly quality;

[0065] The damping bushing 902 and the upper positioning rod 215 are moved downward by the hydraulic press 209, so that the lower end of the upper positioning rod 215 is engaged with the upper end of the lower positioning rod 206. Then, the hydraulic press 209 continues to move the damping bushing 902 downward to press the damping bushing 902 into the mounting sleeve of the sub-frame 901. At the same time, the first slide 213 moves the upper positioning rod 215 upward, so that the upper positioning rod 215 moves upward relative to the damping bushing 902 but remains stationary relative to the lower positioning rod 206. The support sleeve 203 moves downward into the cylindrical cavity 205 as the vibration-damping bushing 902 is pressed in, thereby ensuring that the vibration-damping bushing 902 is strictly pressed into the mounting sleeve of the sub-frame 901 along the axial direction and vertically, and facilitating the upper positioning rod 215 to be smoothly separated from the vibration-damping bushing 902 in the interference fit, and the vibration-damping bushing 902 always maintains a gap with the lower positioning rod 206, avoiding affecting the interference fit between the vibration-damping bushing 902 and the sub-frame 901;

[0066] During operation, the positions of the inner lifting slides 312 are controlled by the multi-axis slide 311, and the external structures of different sub-frames 901 are flexibly adapted. The positions of the corresponding lower clamps 313 are adjusted by the inner lifting slides 312 to support the sub-frame 901, so that the sub-frame 901 remains horizontal after rough adjustment. The upper clamps 315 cooperate with the lower clamps 313 to form multiple clamping limits, so that the sub-frame 901 remains in a stable horizontal position.

[0067] During operation, the axis centerline offset angle of the upper support plate 306 is adjusted by different extension and contraction sizes of each telescopic rod 307, so that the axis centerline of the mounting sleeve of the sub-frame 901 is parallel to the axis centerline of the support sleeve 203. The elasticity and support of the elastic support pad 305 enable the upper support plate 306 to be fine-tuned in the axis centerline angle and to be supported after adjustment. After adjusting the axis centerline angle, the first adjustment frame 308 and the second adjustment frame 309 are orthogonal to axially and accurately adjust the support adjustment The position of the plate 310 is adjusted, and then the clamped sub-frame 901 is fine-tuned, so that the axis of the mounting sleeve of the sub-frame 901 is accurately coaxial with the lower positioning rod 206, and the upper positioning rod 215, the vibration-damping bushing 902, the mounting sleeve of the sub-frame 901, the support sleeve 203, and the lower positioning rod 206 are accurately coaxial from top to bottom, avoiding any deviation of the vibration-damping bushing 902 during the press-fitting process, reducing the influence of the press-fitting process on the pressing force effect of the vibration-damping bushing 902, and ensuring the yield rate of the overall process.

[0068] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A subframe bushing press-fitting device, characterized in that: The invention comprises a support platform (101), on which a pressing mechanism (102) and a positioning mechanism (103) are respectively installed, the pressing mechanism (102) comprises a support elevator (201), a support base (202) and a support bracket (219) are respectively installed on one side of the support elevator (201) close to the positioning mechanism (103), a support sleeve (203) and a support gasket (208) are respectively installed in the middle of the upper surface of the support base (202), a plurality of groups of distance measuring probes (204) are installed on the support sleeve (203), the array axis of each group of distance measuring probes (204) is coaxial with the support sleeve (203), and an upper positioning rod (215) is installed on the support bracket (219).

2. A subframe bushing press-fitting device according to claim 1, characterized in that: A hydraulic press (209) is buried at one side of the top of the support bracket (219); the telescopic end of the hydraulic press (209) is vertically downward and is installed with a first transmission plate (210); a transmission sleeve (211) is installed at the lower part of the first transmission plate (210); a second transmission plate (212) is installed at the lower part of the transmission sleeve (211); a first slide table (213) is installed at the upper part of the second transmission plate (212); a third transmission plate (214) is installed at the movable end of the first slide table (213); an upper positioning rod (215) is installed on the third transmission plate (214); and the upper positioning rod (215) movably passes through the middle part of the second transmission plate (212).

3. A subframe bushing press-fitting device according to claim 2, characterized in that: A support top ring (216) is installed at the lower part of the second transmission plate (212); the upper positioning rod (215), the support top ring (216) and the support sleeve (203) are coaxial; the support gasket ring (208) is arranged on the outer side of the support sleeve (203) and is coaxial with the support sleeve (203); a second slide (217) is buried inside the middle part of the support bracket (219); a limiting top plate (218) is installed at the movable end of the second slide (217); a through hole is opened in the middle part of the limiting top plate (218); and the through hole of the limiting top plate (218) is coaxial with the support top ring (216).

4. The subframe bushing press-fitting device according to claim 1, characterized in that: A cylindrical cavity (205) is provided in the middle of the support base (202), a lower positioning rod (206) is installed at the axis of the cylindrical cavity (205), the lower positioning rod (206) passes through the support sleeve (203) and is slidably connected thereto, a return spring (207) is sleeved on the outer side of the lower positioning rod (206), the top of the return spring (207) is fixedly connected to the support sleeve (203), and the top of the lower positioning rod (206) and the lower end of the upper positioning rod (215) are both provided with corresponding clamping blocks and clamping grooves.

5. The subframe bushing press-fitting device according to claim 4, characterized in that: When the support sleeve (203) is pressed into the cylindrical cavity (205) by the vibration-damping bushing (902), the outer periphery of the lower positioning rod (206) still maintains a uniform gap with the inner surface of the mounting hole groove of the vibration-damping bushing (902).

6. The subframe bushing press-fitting device according to claim 4, characterized in that: The outer diameter of the support sleeve (203) is smaller than the inner diameter of the mounting sleeve of the auxiliary frame (901), and the inner periphery of the support sleeve (203) is slidably sleeved with the lower positioning rod (206).

7. A subframe bushing press-fitting device according to claim 6, characterized in that: The positioning mechanism (103) comprises a single-axis slide (301), which is embedded in the middle of one end of the support platform (101); a lifting push rod (302) is installed on the movable end of the single-axis slide (301); a stepping motor (303) is installed on the telescopic end of the lifting push rod (302); a lower support plate (304), an elastic support pad (305) and an upper support plate (306) are installed on the end of the rotating shaft of the stepping motor (303) in sequence from bottom to top; a plurality of telescopic rods (307) are penetrated through the outer peripheral edge of the upper support plate (306); the telescopic rods (307) are fixedly connected to the upper support plate (306); the telescopic end of the telescopic rod (307) is fixedly connected to the lower support plate (304); and the plurality of telescopic rods (307) are evenly distributed in a ring array.

8. The subframe bushing press-fitting device according to claim 7, characterized in that: A first adjustment frame (308), a second adjustment frame (309) and a support adjustment plate (310) are respectively installed in the middle of the upper surface of the upper support plate (306); the second adjustment frame (309) is located in the first adjustment frame (308); the support adjustment plate (310) is located in the second adjustment frame (309); the support adjustment plate (310) is limited by the second adjustment frame (309) and slides along a horizontal uniaxial direction; the second adjustment frame (309) is limited by the first adjustment frame (308) and slides along a horizontal uniaxial direction; the sliding directions of the second adjustment frame (309) and the support adjustment plate (310) are perpendicular to each other.

9. The subframe bushing press-fitting device according to claim 8, characterized in that: A multi-axis slide (311) is installed in the middle of the upper surface of the support adjustment plate (310), and the rotating axes of the multi-axis slide (311) are evenly distributed at equal angles. An inner lifting slide (312) is installed on each movable end of the multi-axis slide (311), and the outer side of the inner lifting slide (312) is fixedly connected to an outer lifting slide (314). A lower clamp (313) is installed on the movable end of the inner lifting slide (312), and an upper clamp (315) is installed on the movable end of the outer lifting slide (314).

10. A method for using a subframe bushing press-fitting device according to any one of claims 2 to 9, characterized in that: The steps include: Step 1: The support lift (201) lifts the support bracket (219) and installs the vibration-damping bushing (902); Step 2: clamping and positioning the auxiliary frame (901) so that the sleeve installation position of the auxiliary frame (901) is coaxial with the upper positioning rod (215), and then the sleeve installation position of the auxiliary frame (901) is sleeved outside the supporting sleeve (203); Step 3: obtaining the data that needs to be fine-tuned for the sub-frame (901) through each set of distance measuring probes (204), and then making the axis of the mounting sleeve of the sub-frame (901) accurately coaxial with the lower positioning rod (206); Step 4: The hydraulic press (209) presses down the vibration-damping bushing (902), and the upper positioning rod (215) is pulled out, so that the vibration-damping bushing (902) is accurately pressed into the sleeve installation position of the auxiliary frame (901); Step 5: Move the support bracket (219) upward, extend the lifting push rod (302), raise the sub-frame (901), rotate the sub-frame (901), and achieve the result of step 2 again; Step 6: Repeat the above steps until the press-fitting is completed, and then press-fit other sub-frames (901) in sequence.

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