Constant-force pressure-reducing device and method for realizing bearing closing-up of long and narrow parts

Abstract

The embodiment of the invention discloses a constant-force pressure-reducing device and method for realizing bearing closing-in of long and narrow parts, and in the device, a fixed angle seat, a guide rail sliding block assembly and a baffle force-measuring assembly are mounted on a table top of a movable cabinet; the pressure head assembly is installed on sliding blocks on the two sides of the guide rail sliding block assembly and located between the fixed angle seat and the baffle force measuring assembly. The actuating end of the electric cylinder penetrates through a hole of the middle end plate of the fixed angle seat and then is connected with a connecting shaft of the pressure head assembly; a mandrel of the bearing fixing die penetrates through a bearing hole of a bearing to be closed in a bearing mounting hole in a lug of the long and narrow part, and the closing dies at the two ends abut against and press the pressing plate when bearing closing is executed. A control system connected with the electric cylinder controls the actuating end of the electric cylinder to stretch out, pushes the pressing plate to move towards the baffle and presses the bearing fixing die located between the pressing plate and the baffle, so that the closing-in dies at the two ends apply pressure to the two end faces of the bearing at the same time through the annular cutting edge structures on the opposite end faces of the closing-in dies, and closing-in fixing of the bearing on the lugs of the long and narrow parts is achieved.

Description

Technical Field

[0001] The present invention relates to the field of bearing installation technology but is not limited thereto, and in particular to a constant force pressure-collecting device and method for closing a bearing end of a narrow and long part. Background Art

[0002] There are multiple lugs on the side of narrow and long parts, and the distance between different lugs is relatively close. The axial direction of the lug shell hole is parallel to the length direction of the part and the distance is relatively close. When performing the bearing closing process, the closing pressure value is required to be large and the force value must be accurate. The pressure must be gradually applied to the appropriate size at a certain loading rate. It is strictly forbidden to generate impact force. When the closing pressure is loaded to the appropriate size, the equipment can be maintained for a certain period of time before unloading. The working surface of the press is located in the working center of the press. The lugs with bearings on narrow and long parts cannot be placed on the working surface of the press. Because the pressure accuracy of the press itself is poor, the closing position is difficult to be placed in the center, resulting in insufficient pressure and the inability to close the bearing.

[0003] In the Chinese patent with publication number CN 213559516 U, a tool for closing the bearing of a bracket-type component is provided, which facilitates the closing assembly of the bearing of the bracket-type component by moving the working surface of the press to the edge of the workbench. This utility model patent uses edge force to achieve closing, and the protection block and the bracket-type component are subjected to force at the same time, resulting in a large force value error. In addition, the axial direction of the housing hole of the bracket part ear piece is different from that of the narrow and long parts mentioned in the invention patent, and the closing function of the bearing of the narrow and long parts cannot be achieved.

[0004] Existing bearing constant force closing devices usually use a press to control the driving force, and the structure and force value accuracy cannot meet the requirements of precise constant force closing of narrow and long parts. Summary of the invention

[0005] Purpose of the present invention: In order to solve the above-mentioned technical problems, the embodiments of the present invention provide a constant force pressure device and method for realizing bearing closing of narrow and long parts, so as to solve the existing method of bearing closing of narrow and long parts. Since the bearing constant force closing device adopts a press to control the driving force, the structure and force value accuracy are difficult to meet the requirements of precise constant force pressure closing of narrow and long parts.

[0006] Technical solution of the present invention: The embodiment of the present invention provides a constant force pressure device for narrow and long parts to achieve bearing closing, comprising: an electric cylinder 2, a fixed angle seat 3, a pressure head assembly 4, a guide rail slider assembly 5, a bearing fixed mold 6, a baffle force measuring assembly 7, a mobile cabinet 8 and a control system 9; the guide rail slider assembly 5 comprises two parallel guide rails 51, and a slider 52 slidably arranged on each guide rail 51;

[0007] The fixed angle seat 3, the guide rail slider assembly 5 and the baffle force measuring assembly 7 are fixedly mounted on the table of the mobile cabinet 8; the two parallel guide rails 51 in the guide rail slider assembly 5 are fixedly mounted on both sides of the fixed angle seat 3 and the baffle force measuring assembly 7, and the pressure head assembly 4 is mounted on the sliders 52 on both sides and is located between the fixed angle seat 3 and the baffle force measuring assembly 7; the electric cylinder 2 is fixedly mounted on the fixed angle seat 3;

[0008] The pressure head assembly 4 includes a pressure plate 43 vertically mounted on the sliders 52 on both sides, and a connecting shaft 42 vertically fixedly arranged on the end surface of one side of the pressure plate 43; the actuating end of the electric cylinder 2 passes through the avoidance hole on the middle end plate of the fixed angle seat 3 and is fixedly connected to the connecting shaft 42 of the pressure head assembly 4, so that when the actuating end of the electric cylinder 2 moves, the connecting shaft 42 drives the entire pressure head assembly 4 to move along the guide rail;

[0009] The baffle force measuring assembly 7 comprises: a baffle 72 arranged parallel to the pressure plate 43, and a force sensor 71 arranged in a middle groove on the upper end surface of the baffle 72 close to the pressure plate 43;

[0010] The bearing fixing die 6 comprises: a mandrel 61, and closing dies 62 respectively connected to both ends of the mandrel 61; the mandrel 61 passes through the bearing hole of the bearing 10 to be closed in the bearing mounting hole on the ear piece of the narrow and long parts, and the closing dies 62 at both ends are set as cylinders with annular blade structures on the opposite end faces, and the outer end face of the closing die 62 at one end is set with a countersunk hole for connecting with the end of the force sensor 71, and the outer end face of the closing die 62 at the other end is set as a plane for pressing against the pressure plate 43 when performing the bearing closing;

[0011] The control system 9 is arranged in the mobile cabinet 8, and the control system 9 is connected to the electric cylinder 2. When performing bearing closing on the narrow and long parts 1, the control system 9 controls the actuating end of the electric cylinder 2 to extend to push the pressure plate 43 to move toward the baffle 72, and press the bearing fixing mold 6 located between the pressure plate 43 and the baffle 72, so that the closing molds 62 at both ends thereof can simultaneously apply pressure to the two end surfaces of the bearing with the annular blade structures on the opposite end surfaces, thereby realizing the closing and fixing of the bearing 10 on the ear piece of the narrow and long parts 1.

[0012] Optionally, in the constant force pressure-receiving device for achieving bearing closing of narrow and long parts as described above,

[0013] The pressure head assembly 4 also includes: a T-shaped stop pin 41; a countersunk hole is provided on one end face of the pressure plate 43 close to the baffle 72, and the pin body end of the T-shaped stop pin 41 passes through the countersunk hole of the pressure plate 43, so that its T-shaped end is confined in the countersunk hole; one end of the connecting shaft 42 is provided with an internal thread for being screwed and fixed with the external thread of the pin body end of the T-shaped stop pin 41, and the other end of the connecting shaft 42 is provided with an external thread for being screwed and fixed with the external thread of the actuating end of the electric cylinder 2.

[0014] Optionally, in the constant force pressure-receiving device for achieving bearing closing of narrow and long parts as described above,

[0015] The pressing head assembly 4 further includes: connecting plates symmetrically arranged on both sides of the pressing plate 43, and reinforcing rib plates arranged between the connecting plates and the pressing plate 43; the pressing head assembly 4 is fixedly connected to the sliders 52 on the corresponding sides through the connecting plates on both sides.

[0016] Optionally, in the constant force pressure-receiving device for achieving bearing closing of narrow and long parts as described above,

[0017] In the bearing fixing die 6, the opposite end faces of the two closing dies 62 are provided with a central shaft hole, the diameter of the middle shaft body of the core shaft 61 matches the inner hole diameter of the bearing to be closed, and the diameters of the cylindrical shaft bodies on both sides match the diameters of the central shaft holes of the closing dies 62 at both ends, so as to be inserted and fixed on the closing dies 62 at both ends;

[0018] Among them, the outer inclination angle of the annular blade structure arranged on the opposite end faces of the two closing dies 62 is the same as the outer inclination angle of the bearing mounting hole on the ear piece of the narrow and long part 1, and the diameter and depth of the countersunk hole on the outer end face of the closing die 62 at one end match the protruding structure on the end face of the force sensor 71.

[0019] Optionally, in the fixed force pressure-collecting device for realizing bearing closing of narrow and long parts as described above, the upper end plane of the pressure plate 43 is higher than the upper end surface of the electric cylinder 2, and the distance between the two upper end surfaces is greater than the distance between the axis of the bearing mounting hole on the middle ear piece of the narrow and long part 1 and the lower end surface of the part;

[0020] The upper end surface of the baffle 72 is flush with the upper end surface of the pressure plate 43, and the distance between the axis of the force sensor 71 and the upper end surface of the baffle 72 is smaller than the distance between the axis of the bearing mounting hole on the middle ear piece of the narrow and long part 1 and the lower end surface of the part.

[0021] Optionally, in the constant force pressure-receiving device for achieving bearing closing of narrow and long parts as described above,

[0022] The stroke of the electric cylinder 2 is a, the overall length of the bearing fixed mold 6 is b, and the maximum distance between the pressure plate 43 and the baffle 72 is c. The distance between the initial position of the pressure plate 43 and the baffle 72 is set to meet the following constraints:

[0023] c<a+b and c>b.

[0024] Optionally, in the constant force pressure-receiving device for achieving bearing closing of narrow and long parts as described above,

[0025] The control system 9 includes: a controller 92 disposed inside the mobile cabinet 8, and a screen 91 disposed on the table of the mobile cabinet 8;

[0026] Among them, the control system 9 is a servo feedback control system 9, which is used to control the pressure generated after the pressure plate 43 contacts the bearing fixed mold 6, and gradually applies pressure to a set pressure value at a preset loading rate; and adjusts the pressure size and loading rate applied by the electric cylinder 2 according to the pressure value feedback from the force sensor 71 in the baffle force measuring assembly 7. When the pressure is loaded to the set pressure value, the electric cylinder 2 is controlled to drive the pressure head assembly 4 to automatically retract after maintaining the pressure for a preset time to complete the bearing closing; the screen 91 is used to display the operating speed and position of the electric cylinder in real time, as well as the pressure data on the bearing, and output a curve graph of pressure changes with time and position.

[0027] In a second aspect, an embodiment of the present invention further provides a method for achieving bearing closing of narrow and long parts with constant force and pressure, and a method for achieving bearing closing of narrow and long parts with constant force and pressure is performed using a constant force and pressure device for achieving bearing closing of narrow and long parts as described in any of the above items, and the method for achieving constant force and pressure on the bearing on the narrow and long parts includes:

[0028] Step 1: Check the structural integrity and surface cleanliness of the bearing before installation;

[0029] Step 2, using the closing dies 62 at both ends of the bearing fixing die 6 to clamp the bearing, including: the bearing to be closed is installed in the bearing mounting hole on the ear piece of the narrow and long part 1, the core shaft 61 passes through the bearing hole, the closing dies 62 at both ends are arranged with their annular blade structures opposite to each other and are connected to the two ends of the core shaft 61 facing the bearing direction, and the annular blade structures of the closing dies 62 at both ends are stuck in the groove of the bearing;

[0030] Step 3, the bearing fixing die 6 is placed between the pressing plate 43 and the baffle 72, the countersunk hole on the outer end surface of the closing die 62 at one end is matched and connected with the protrusion of the force sensor 71 arranged on the end surface of the baffle 72, and is close to the force sensor 71, and the closing die 62 at the other end is close to the end surface of the pressing plate 43;

[0031] Step 4, start the electric cylinder 2 through the control system 9 and control its actuating end to move toward one side of the bearing, push the pressing plate 43 of the pressing head assembly 4 to press against the other end of the closing die 62, and the generated pressure gradually increases to the set pressure value according to the preset loading rate, and under the action of the pressure, the axial direction of the bearing fixed die 6 is automatically perpendicular to the end surface of the baffle 72;

[0032] Step 5: After the control system 9 detects that the pressure value fed back by the force sensor 71 reaches the set pressure value, it controls the electric cylinder 2 to drive the pressure head assembly 4 to automatically retreat after maintaining the pressure for a preset time, thereby completing the bearing closing operation.

[0033] Optionally, the above-mentioned method for achieving bearing closing with constant force for narrow and long parts further includes:

[0034] Step 6, performing a closing quality inspection on the bearing after the closing operation is completed, wherein the quality inspection standards include:

[0035] Appearance inspection of the bearing: wrinkles, cracks and burrs are not allowed at the closing part, extrusion marks are allowed, and the edge clearance at the closing part is less than 0.1mm;

[0036] Check the no-load starting torque of the bearing, and make sure it meets the installation requirements;

[0037] Check the axial thrust of the bearing. Under the specified axial thrust, there is no relative displacement between the bearing and the housing hole or the relative displacement does not exceed 0.1mm.

[0038] Optionally, in the above-mentioned method for achieving bearing closing with constant force for narrow and long parts, the setting pressure value in step 4 is determined in the following manner:

[0039] The baffle 72 in the baffle force measuring assembly 7 is deformed at a small angle under pressure, so that the angle between the axis of the bearing fixed mold 6 and the normal of the baffle 72 is α;

[0040] The pressure value fed back by the pressure sensor 71 is F1, and the axial pressure of the bearing fixed mold 6 is F2. When the control system 9 detects that the fed-back pressure value F1=F2cosα, it indicates that the axial pressure applied to the bearing fixed mold 6 has reached the set pressure value.

[0041] Beneficial effects of the present invention: The embodiment of the present invention provides a constant force pressure device and method for closing the bearing of narrow and long parts. In view of the special structure of narrow and long parts and the bearings installed on the ears of such parts, a fixed angle seat 3, a guide rail slider assembly 5, a baffle force measuring assembly 7, and a pressure head assembly 4 installed on the guide rail slider assembly 5 are fixedly installed on the mobile cabinet 8, and an electric cylinder 2 is used to push the pressure head assembly 4, so that the bearing fixing mold 6 between the pressure plate 43 of the pressure head assembly 4 and the baffle 72 of the baffle force measuring assembly 7 generates pressure on the bearing to be closed, so that the annular blade structure of the closing mold 62 at both ends of the bearing fixing mold 6 that cooperates with the end face of the bearing simultaneously applies pressure to the two end faces of the bearing, thereby achieving the closing and fixing of the bearing 10 on the ear of the narrow and long parts. The technical solution provided by the embodiment of the present invention has the following beneficial effects:

[0042] (1) The constant force pressure device for bearing closing provided by the present invention has small overall strength deformation and precise force value. It adopts double guide rails with double slider structure, stop pin constraint, force value feedback, servo motor, strength analysis, frame structure on the upper surface of the mobile cabinet and other methods to improve the overall strength and force value accuracy of the device.

[0043] (2) The constant force and pressure device for closing a bearing provided by the present invention has a structural constraint designed based on the structural characteristics of narrow and long parts. It can realize the closing function of bearings in narrow and long parts, and can meet the precise closing requirements of various other complex parts, and has strong versatility.

[0044] (3) The bearing closing constant force and pressure collecting device provided by the present invention can be moved and used at different workstations, has a light overall weight, is simple and easy to operate, and is convenient and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0046] Figure 1 A schematic diagram of the overall structure of a constant force pressure-collecting device for closing a bearing of a narrow and long part provided by an embodiment of the present invention;

[0047] Figure 2 for Figure 1 A partially enlarged structural diagram of a constant force pressure-collecting device for narrow and long parts to achieve bearing closing provided by the illustrated embodiment;

[0048] Figure 3 A schematic diagram of the structure of a narrow and long part used in the constant force pressure receiving device provided in an embodiment of the present invention;

[0049] Figure 4 for Figure 1 The illustrated embodiment provides a structural schematic diagram of a bearing fixing die in a constant force pressure-collecting device for closing a bearing of a narrow and long part;

[0050] Figure 5 for Figure 1 The overall structural diagram of the pressure head assembly in the constant force pressure-collecting device for narrow and long parts to achieve bearing closing provided by the illustrated embodiment;

[0051] Figure 6 for Figure 5 A cross-sectional view of a press head assembly provided by the illustrated embodiment;

[0052] Figure 7 for Figure 1 A schematic diagram of structural parameters in a constant force pressure-collecting device for narrow and long parts to achieve bearing closing provided by the illustrated embodiment;

[0053] Figure 8 A flow chart of a method for achieving constant force compression of a bearing end of a narrow and long part provided in an embodiment of the present invention.

[0054] Description of reference numerals:

[0055] 1. Narrow and long parts; 2. Electric cylinder; 3. Fixed angle seat; 4. Press head assembly; 41. T-type stop pin; 42. Connecting shaft; 43. Press plate; 5. Guide rail and slider assembly; 51. Guide rail; 52. Slider; 6. Bearing fixing mold; 61. Mandrel; 62. Closing mold; 7. Baffle force measuring assembly; 71. Force sensor; 72. Baffle; 8. Mobile cabinet; 9. Control system; 91. Screen; 92. Controller; 10. Bearing. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other arbitrarily without conflict.

[0057] The above background technology has already explained the structure of narrow and long parts and the need for bearing closing on their side ears. However, the existing bearing constant force closing device usually uses a press to control the driving force, and the structure and force value accuracy cannot meet the requirements of precise constant force closing of narrow and long parts.

[0058] In response to the above-mentioned problems and the requirements for bearing closing of long and narrow parts, an embodiment of the present invention provides a constant force pressure closing device and method for closing the bearing of long and narrow parts.

[0059] The present invention provides the following specific embodiments which can be combined with each other. The same or similar concepts or processes may not be described in detail in some embodiments.

[0060] Figure 1 The overall structural diagram of a constant force pressure-collecting device for narrow and long parts to achieve bearing closing is provided in an embodiment of the present invention. Figure 2 for Figure 1 The embodiment shown is a partial enlarged structural diagram of a constant force pressure-collecting device for narrow and long parts to achieve bearing closing. Figure 2 The structural relationship among the fixed angle seat 3, the pressure head assembly 4, the guide rail slider assembly 5 and the baffle force measuring assembly 7 is specifically shown. Figure 2 and Figure 3 As shown, the overall structure of the constant force pressure-collecting device for realizing bearing closing of narrow and long parts provided by the embodiment of the present invention includes: an electric cylinder 2, a fixed angle seat 3, a pressure head assembly 4, a guide rail and slider assembly 5 (including a guide rail 51 and a slider 52), a bearing fixed mold 6, a baffle force measuring assembly 7 (including a force sensor 71 and a baffle 72), a mobile cabinet 8 and a control system 9; the guide rail and slider assembly 5 includes two parallel guide rails 51, and a slider 52 slidably arranged on each guide rail 51.

[0061] like Figure 3, which is a schematic diagram of the structure of the narrow and long parts used in the constant force pressure receiving device provided in an embodiment of the present invention. Figure 3 One side of the long and narrow part 1 has multiple ears (only one ear is shown in the figure), the bearing is pressed into the bearing mounting hole of the ear, and the end faces on both sides of the ear are provided with outer inclination angles for matching with the closing structure of the bearing.

[0062] like Figure 1 and Figure 2 In the structure of the constant force pressure receiving device shown, the fixed angle seat 3, the guide rail slider assembly 5 and the baffle force measuring assembly 7 are fixedly mounted on the table top of the mobile cabinet 8; the two parallel guide rails 51 in the guide rail slider assembly 5 are fixedly mounted on both sides of the fixed angle seat 3 and the baffle force measuring assembly 7, and the pressure head assembly 4 is mounted on the sliders 52 on both sides and is located between the fixed angle seat 3 and the baffle force measuring assembly 7; the electric cylinder 2 is fixedly mounted on the fixed angle seat 3, so that the electric cylinder 2 is fixed on the table top of the mobile cabinet 8 through the fixed angle seat 3.

[0063] It can be seen that the end plate of the fixed angle seat 3, the pressure head assembly 4, and the baffle 72 in the baffle force measuring assembly 7 in the embodiment of the present invention are arranged in parallel, and the fixed angle seat 3, the pressure head assembly 4, the guide rail slider assembly 5 and the baffle force measuring assembly 7 are all symmetrical structures along the center lines of the guide rails 51 on both sides.

[0064] like Figure 2 The structure of the pressure head assembly 4 is schematically shown in the figure, and the pressure head assembly 4 includes a pressure plate 43 vertically installed on the sliders 52 on both sides, and a connecting shaft 42 vertically fixedly arranged on the end face of one side of the pressure plate 43; the actuating end of the electric cylinder 2 passes through the avoidance hole on the middle end plate of the fixed angle seat 3 and is fixedly connected with the connecting shaft 42 of the pressure head assembly 4; when the actuating end of the electric cylinder 2 moves, the entire pressure head assembly 4 can be driven to move along the guide rail through the connecting shaft 42.

[0065] like Figure 2 The structure of the baffle force measuring assembly 7 is schematically shown in the figure, and the baffle force measuring assembly 7 includes: a baffle 72 arranged parallel to the pressure plate 43, and a force sensor 71 arranged in the middle groove on the upper end surface of the baffle 72 close to the pressure plate 43, and a plurality of reinforcing ribs arranged on the other side of the baffle 72.

[0066] Figure 4 for Figure 1The embodiment shown is a schematic structural diagram of a bearing fixing die in a constant force pressure-collecting device for closing a bearing of a narrow and long part. In the embodiment of the present invention, the bearing fixing die 6 comprises: a core shaft 61, and closing dies 62 respectively connected to both ends of the core shaft 61; since the bearing mounting hole on the ear piece of the narrow and long part is equipped with a bearing to be closed, the core shaft 61 passes through the bearing hole of the bearing on the narrow and long part, and the closing dies 62 at both ends are set as cylinders with annular blade structures on the opposite end faces. The outer inclination angle of the blade structure is the same as the outer inclination angle of the bearing mounting hole on the ear piece. The closing die 62 at one end ( Figure 4 The outer end surface of the right end in FIG. 1 is provided with a countersunk hole for connecting with the end of the force sensor 71, and the other end of the closing die 62 ( Figure 4 The outer end surface of the left end in the middle is set as a plane, which is used to press against the pressure plate 43 when the bearing is closed.

[0067] like Figure 1 As shown, the main structure of the control system 9 is arranged in the mobile cabinet 8. The control system 9 is connected to the electric cylinder 2 and is used to control the actuating end of the electric cylinder 2 to extend when performing bearing closing for narrow and long parts, so as to push the pressure plate 43 to move toward the baffle 72, and press the bearing fixing mold 6 located between the pressure plate 43 and the baffle 72, so that the closing molds 62 at both ends thereof can simultaneously apply pressure to the two end surfaces of the bearing with the annular blade structures on the opposite end surfaces, thereby realizing the closing and fixing of the bearing 10 on the ear piece of the narrow and long part 1.

[0068] In an implementation of the embodiment of the present invention, a possible implementation of the pressure head assembly 4 is provided. Figure 5 for Figure 1 The overall structural diagram of the pressure head assembly in the constant force pressure-collecting device for narrow and long parts to achieve bearing closing is provided in the embodiment shown. Figure 6 for Figure 5 The embodiment shown provides a cross-sectional view of a pressure head assembly. Figure 5 and Figure 6 As shown, the pressure head assembly 4 in this implementation manner includes, in addition to the pressure plate 43 and the connecting shaft 42 , a T-shaped stop pin 41 .

[0069] In this implementation, a countersunk hole is provided on one end face of the pressure plate 43 close to the baffle 72, and the pin body end of the T-type stop pin 41 passes through the countersunk hole of the pressure plate 43, so that its T-type end is confined in the countersunk hole; one end of the connecting shaft 42 is provided with an internal thread for being screwed and fixed with the external thread of the pin body end of the T-type stop pin 41, and the other end of the connecting shaft 42 is provided with an external thread for being screwed and fixed with the external thread of the actuating end of the electric cylinder 2.

[0070] Furthermore, in this implementation, the pressure head assembly 4 further includes: connecting plates symmetrically arranged on both sides of the pressure plate 43, and reinforcing rib plates arranged between the connecting plates and the pressure plate 43, such as Figure 5 As shown, the pressing plate 43 as a whole forms an "I"-shaped structure that is symmetrical in front and back and left and right. In addition, the pressing head assembly 4 is fixedly connected to the sliders 52 on the corresponding sides through the connecting plates on both sides. Accordingly, the guide rail slider assembly 5 is set as a double guide rail 51 and double slider 52 structure, each guide rail 51 has two sliders 52, and the four sliders 52 are symmetrically arranged along the pressing plate 43 in front and back and left and right, and each side connecting plate of the pressing head assembly 4 is fixedly connected to the two sliders 52 on the same side.

[0071] In one implementation of the embodiment of the present invention, a possible implementation of the bearing fixing mold 6 is provided. Figure 4 As shown, in the bearing fixing die 6 of this implementation, the opposite end faces of the two closing dies 62 are provided with central axial holes, the diameter of the middle shaft body of the core shaft 61 matches the diameter of the inner hole of the bearing to be closed, and the diameters of the cylindrical shaft bodies on both sides match the diameters of the central axial holes of the closing dies 62 at both ends, so as to be inserted and fixed on the closing dies 62 at both ends.

[0072] In this implementation, the outer inclination angle of the annular blade structure arranged on the opposite end faces of the two closing dies 62 is the same as the outer inclination angle of the bearing mounting hole on the ear piece of the narrow and long parts, so that the bearing after closing is aligned with the inclination angle on the end face of the ear piece of the narrow and long parts, and the diameter and depth of the countersunk hole on the outer end face of the closing die 62 at one end match the raised structure on the end face of the force sensor 71, so that the closing die 62 at this end is fixed with the force sensor 71, and the closing die 62 at the other end is close to the end face of the pressure plate 43 before pressure is applied.

[0073] In practical applications, the core shaft 61 can be set as an integral structure with the closing die 62 at either end. After one closing die 62 with the core shaft 61 passes through the bearing hole through the end of its core shaft 61, it is fixedly connected to the opposite end face of the other closing die 62, and pressure is subsequently applied to the bearing.

[0074] It should be noted that based on Figure 3 The specific structure of the narrow and long parts shown in the figure, when closing the bearing on the ear piece of such parts, the parts themselves are placed directly above the overall constant force pressure receiving device. Therefore, the structural constraints in the constant force pressure receiving device should meet the following conditions:

[0075] First, the upper end plane of the pressure plate 43 is higher than the upper end surface of the electric cylinder 2, and the distance between the two upper end surfaces is greater than the distance between the axis of the bearing mounting hole on the middle ear piece of the narrow and long part 1 and the lower end surface of the part, so as to avoid structural interference between the narrow and long part 1 and the fixed force pressure receiving device;

[0076] Second, the upper end surface of the baffle 72 is flush with the upper end surface of the pressure plate 43, and the distance between the axis of the force sensor 71 and the upper end surface of the baffle 72 is smaller than the distance between the axis of the bearing mounting hole on the middle ear piece of the narrow and long part 1 and the lower end surface of the part, so that the closing mold 62 at one end of the bearing fixing mold 6 after the bearing is assembled can be end-to-end connected with the force sensor 71.

[0077] In one implementation of the embodiment of the present invention, a parameter description of the structural design of the constant force pressure receiving device is provided, such as Figure 7 As shown, Figure 1 The illustrated embodiment provides a schematic diagram of structural parameters in a constant force pressure-collecting device for closing the bearing of narrow and long parts.

[0078] In this implementation, the stroke of the electric cylinder 2 is a, the overall length of the bearing fixed mold 6 is b, and the maximum distance between the pressing plate 43 and the baffle 72 is c. The distance between the initial position of the pressing plate 43 and the baffle 72 is set to meet the following constraints:

[0079] c<a+b and c>b.

[0080] In one implementation of the embodiment of the present invention, a possible implementation of the control system 9 is provided. The control system 9 in this implementation includes: a controller 92 and a screen 91. The controller 92 is installed inside the mobile cabinet 8 as a main control component for controlling the closing operation. The screen 91 is installed above the table of the mobile cabinet 8 to display the parameters and feedback pressure of the closing operation.

[0081] In this implementation, the control system 9 is a servo feedback control system 9, which is used to control the pressure generated after the pressure plate 43 contacts the bearing fixed mold 6, and gradually applies pressure to a set pressure value at a preset loading rate; and adjusts the pressure and loading rate applied by the electric cylinder 2 according to the pressure value feedback from the force sensor 71 in the baffle force measuring assembly 7. When the pressure is loaded to the set pressure value, the electric cylinder 2 is controlled to drive the pressure head assembly 4 to automatically retract after maintaining the pressure for a preset time to complete the bearing closing; the screen 91 is used to display the operating speed and position of the electric cylinder in real time, as well as the pressure data on the bearing, and output a curve graph of the pressure changing with time and position.

[0082] Furthermore, the electric cylinder 2 in this implementation is driven by a servo motor, and the servo motor is equipped with a multi-turn absolute encoder to provide real-time feedback on the motor position.

[0083] In one implementation of the embodiment of the present invention, the upper surface of the mobile cabinet 8 is a frame structure, the main body of the mobile cabinet 8 is made of aluminum alloy, and there are four casters at the bottom to facilitate overall movement. In addition, the bearing is a spherical bearing, and the fixed outer ring of the spherical bearing has a groove.

[0084] The constant force pressure collecting device provided in the embodiment of the present invention is used for closing the bearing of narrow and long parts. In view of the special structure of narrow and long parts and the bearings installed on the ears of such parts, a fixed angle seat 3, a guide rail slider assembly 5, a baffle force measuring assembly 7, and a pressure head assembly 4 installed on the guide rail slider assembly 5 are fixedly installed on the mobile cabinet 8, and the electric cylinder 2 is used to push the pressure head assembly 4, so that the bearing fixing mold 6 between the pressure plate 43 of the pressure head assembly 4 and the baffle 72 of the baffle force measuring assembly 7 generates pressure on the bearing to be closed, so that the annular blade structure of the closing mold 62 at both ends of the bearing fixing mold 6 that cooperates with the end face of the bearing simultaneously applies pressure to the two end faces of the bearing, thereby achieving the closing and fixing of the bearing 10 on the ears of narrow and long parts. The constant force pressure collecting device provided in the embodiment of the present invention has the following beneficial effects:

[0085] (1) The constant force pressure device for bearing closing provided by the present invention has small overall strength deformation and precise force value. It adopts double guide rails with double slider structure, stop pin constraint, force value feedback, servo motor, strength analysis, frame structure on the upper surface of the mobile cabinet and other methods to improve the overall strength and force value accuracy of the device.

[0086] (2) The constant force and pressure device for closing a bearing provided by the present invention has a structural constraint designed based on the structural characteristics of narrow and long parts. It can realize the closing function of bearings in narrow and long parts, and can meet the precise closing requirements of various other complex parts, and has strong versatility.

[0087] (3) The bearing closing constant force and pressure collecting device provided by the present invention can be moved and used at different workstations, has a light overall weight, is simple and easy to operate, and is convenient and fast.

[0088] Based on the constant force pressure receiving device for realizing bearing closing of narrow and long parts provided in the above embodiments of the present invention, the embodiments of the present invention also provide a constant force pressure receiving method for realizing bearing closing of narrow and long parts. The constant force pressure receiving device for realizing bearing closing of narrow and long parts provided in any of the above embodiments can be used to perform the constant force pressure receiving method for bearings on narrow and long parts, such as Figure 8 As shown, it is a flow chart of a method for constant force pressure reduction for achieving bearing closing of narrow and long parts provided by an embodiment of the present invention. The method for constant force pressure reduction may include the following steps:

[0089] Step 1: Check the structural integrity and surface cleanliness of the bearing before installation;

[0090] In this step 1, the bearing should be free of damage, rust, metal chips or other dirt.

[0091] Step 2, using the closing dies 62 at both ends of the bearing fixing die 6 to clamp the bearing, including: the bearing to be closed is installed in the bearing mounting hole on the ear piece of the narrow and long part, the core shaft 61 passes through the bearing hole, and the closing dies 62 at both ends are arranged oppositely with their annular blade structures and are connected to the two ends of the core shaft 61 facing the bearing direction, and the annular blade structures of the closing dies 62 at both ends are stuck in the groove of the bearing;

[0092] Step 3, the bearing fixing die 6 is placed between the pressing plate 43 and the baffle 72, the countersunk hole on the outer end surface of the closing die 62 at one end is matched and connected with the protrusion of the force sensor 71 arranged on the end surface of the baffle 72, and is close to the force sensor 71, and the closing die 62 at the other end is close to the end surface of the pressing plate 43;

[0093] Step 4, start the electric cylinder 2 through the control system 9 and control its actuating end to move toward one side of the bearing, push the pressing plate 43 of the pressing head assembly 4 to press against the other end of the closing die 62, and the generated pressure gradually increases to the set pressure value according to the preset loading rate, and under the action of the pressure, the axial direction of the bearing fixed die 6 is automatically perpendicular to the end surface of the baffle 72;

[0094] Step 5: After the control system 9 detects that the pressure value fed back by the force sensor 71 reaches the set pressure value, it controls the electric cylinder 2 to drive the pressure head assembly 4 to automatically retreat after maintaining the pressure for a preset time, thereby completing the bearing closing operation.

[0095] Furthermore, the constant force pressure closing method for narrow and long parts to achieve bearing closing provided by the embodiment of the present invention may also include the following steps:

[0096] Step 6: Check the bearing quality after the bearing closing operation is completed. The quality inspection standards include:

[0097] Appearance inspection of the bearing: wrinkles, cracks and burrs are not allowed at the closing part, extrusion marks are allowed, and the edge clearance at the closing part is less than 0.1mm;

[0098] Check the no-load starting torque of the bearing, and make sure it meets the installation requirements;

[0099] Check the axial thrust of the bearing. Under the specified axial thrust, there is no relative displacement between the bearing and the housing hole or the relative displacement does not exceed 0.1mm.

[0100] In one implementation of the embodiment of the present invention, the setting pressure value in step 4 is determined, for example, as follows:

[0101] Considering that the baffle 72 in the baffle force measuring assembly 7 undergoes a small angle deformation under pressure, the angle between the axis of the bearing fixed mold 6 and the normal of the baffle 72 is α.

[0102] In this implementation, the pressure value fed back by the pressure sensor 71 is F1, and the axial pressure of the bearing fixed mold 6 is F2. When the control system 9 detects that the fed-back pressure value F1 is:

[0103] When F1=F2cosα, it indicates that the axial pressure applied to the bearing fixed die 6 has reached the set pressure value, wherein the α value in the embodiment of the present invention can be obtained by strength simulation using finite element software.

[0104] Although the embodiments disclosed in the present invention are as above, the contents are only embodiments adopted to facilitate understanding of the present invention and are not intended to limit the present invention. Any technician in the field to which the present invention belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in the present invention, but the patent protection scope of the present invention shall still be subject to the scope defined in the attached claims.

Claims

1. A constant force pressure device for narrow and long parts to achieve bearing closing, characterized in that: include: An electric cylinder (2), a fixed angle seat (3), a pressure head assembly (4), a guide rail slider assembly (5), a bearing fixed mold (6), a baffle force measuring assembly (7), a mobile cabinet (8) and a control system (9); the guide rail slider assembly (5) comprises two guide rails (51) arranged in parallel, and a slider (52) slidably arranged on each guide rail (51); The fixed angle seat (3), the guide rail slider assembly (5) and the baffle force measuring assembly (7) are fixedly mounted on the table of the mobile cabinet (8); the two parallel guide rails (51) in the guide rail slider assembly (5) are fixedly mounted on both sides of the fixed angle seat (3) and the baffle force measuring assembly (7); the pressure head assembly (4) is mounted on the sliders (52) on both sides and is located between the fixed angle seat (3) and the baffle force measuring assembly (7); the electric cylinder (2) is fixedly mounted on the fixed angle seat (3); The pressure head assembly (4) comprises a pressure plate (43) vertically mounted on two side sliders (52), and a connecting shaft (42) vertically fixedly arranged on one side end surface of the pressure plate (43); the actuating end of the electric cylinder (2) passes through the avoidance hole on the middle end plate of the fixed angle seat (3) and is fixedly connected to the connecting shaft (42) of the pressure head assembly (4), so that when the actuating end of the electric cylinder (2) moves, the connecting shaft (42) drives the entire pressure head assembly (4) to move along the guide rail; The baffle force measuring assembly (7) comprises: a baffle (72) arranged parallel to the pressure plate (43), and a force sensor (71) arranged in a middle groove on the upper end surface of the baffle (72) close to the pressure plate (43); The bearing fixing die (6) comprises: a core shaft (61), and closing dies (62) respectively connected to both ends of the core shaft (61); the core shaft (61) passes through the bearing hole of the bearing (10) to be closed in the bearing mounting hole on the ear piece of the narrow and long parts, and the closing dies (62) at both ends are arranged as cylinders with annular blade structures on the opposite end faces, and the outer end face of the closing die (62) at one end is arranged with a countersunk hole for connecting with the end of the force sensor (71), and the outer end face of the closing die (62) at the other end is arranged as a plane for pressing against the pressure plate (43) when performing the bearing closing; The control system (9) is arranged in the mobile cabinet (8), and the control system (9) is connected to the electric cylinder (2) and is used to control the actuating end of the electric cylinder (2) to extend when performing bearing closing on the narrow and long parts (1), so as to push the pressure plate (43) to move toward the baffle (72), and to press the bearing fixing mold (6) located between the pressure plate (43) and the baffle (72), so that the closing molds (62) at both ends thereof can simultaneously apply pressure to the two end surfaces of the bearing with the annular blade structures on the opposite end surfaces, thereby realizing the closing and fixing of the bearing (10) on the ear piece of the narrow and long parts (1).

2. According to claim 1, the constant force pressure device for achieving bearing closing of narrow and long parts is characterized in that: The pressure head assembly (4) also includes: a T-shaped stop pin (41); a countersunk hole is provided on one end face of the pressure plate (43) close to the baffle (72); the pin body end of the T-shaped stop pin (41) passes through the countersunk hole of the pressure plate (43), so that its T-shaped end is restricted in the countersunk hole; one end of the connecting shaft (42) is provided with an internal thread for being screwed and fixed with the external thread of the pin body end of the T-shaped stop pin (41); the other end of the connecting shaft (42) is provided with an external thread for being screwed and fixed with the external thread of the actuating end of the electric cylinder (2).

3. The constant force pressure-collecting device for closing the bearing of narrow and long parts according to claim 2 is characterized in that: The pressure head assembly (4) further comprises: connecting plates symmetrically arranged on both sides of the pressure plate (43), and reinforcing rib plates arranged between the connecting plates and the pressure plate (43); the pressure head assembly (4) is fixedly connected to the sliders (52) on the corresponding sides via the connecting plates on both sides.

4. The constant force pressure-collecting device for closing the bearing of narrow and long parts according to claim 1 is characterized in that: In the bearing fixing die (6), the opposite end faces of the two closing dies (62) are provided with a central shaft hole, the diameter of the middle shaft body of the core shaft (61) matches the diameter of the inner hole of the bearing to be closed, and the diameters of the cylindrical shaft bodies on both sides match the diameters of the central shaft holes of the closing dies (62) at both ends, so as to be inserted into and fixed on the closing dies (62) at both ends; The outer inclination angle of the annular blade structure arranged on the opposite end faces of the two closing dies (62) is the same as the outer inclination angle of the bearing mounting hole on the ear piece of the narrow and long part (1), and the diameter and depth of the countersunk hole on the outer end face of the closing die (62) at one end match the protruding structure on the end face of the force sensor (71).

5. The constant force pressure-collecting device for narrow and long parts to realize bearing closing according to any one of claims 1 to 4, characterized in that: The upper end plane of the pressing plate (43) is higher than the upper end surface of the electric cylinder (2), and the distance between the two upper end surfaces is greater than the distance between the axis of the bearing mounting hole on the middle ear piece of the narrow and long part (1) and the lower end surface of the part; The upper end surface of the baffle (72) is flush with the upper end surface of the pressure plate (43), and the distance between the axis of the force sensor (71) and the upper end surface of the baffle (72) is smaller than the distance between the axis of the bearing mounting hole on the middle ear plate of the narrow and long part (1) and the lower end surface of the part.

6. The constant force pressure-collecting device for narrow and long parts to realize bearing closing according to any one of claims 1 to 4, characterized in that: The stroke of the electric cylinder (2) is a, the overall length of the bearing fixing die (6) is b, and the maximum distance between the pressing plate (43) and the baffle (72) is c. The distance between the initial position of the pressing plate (43) and the baffle (72) is set to satisfy the following constraints: c<a+b and c>b.

7. The constant force pressure-collecting device for narrow and long parts to realize bearing closing according to any one of claims 1 to 4, characterized in that: The control system (9) comprises: a controller (92) arranged inside the mobile cabinet (8), and a screen (91) arranged on the table of the mobile cabinet (8); The control system (9) is a servo feedback control system (9), which is used to control the pressure generated after the pressure plate (43) contacts the bearing fixed mold (6), and gradually applies pressure to a set pressure value at a preset loading rate; and adjust the pressure and loading rate applied by the electric cylinder (2) according to the pressure value feedback from the force sensor (71) in the baffle force measuring assembly (7); when the pressure is loaded to the set pressure value, the electric cylinder (2) is controlled to drive the pressure head assembly (4) to automatically retreat after maintaining the pressure for a preset time, so as to complete the closing of the bearing; the screen (91) is used to display the running speed and position of the electric cylinder (2) and the pressure data on the bearing in real time, and output a curve graph showing the pressure changes with time and position.

8. A constant force pressure closing method for narrow and long parts to achieve bearing closing, characterized in that: A method for applying constant force pressure to bearings on long and narrow parts is performed by using a constant force pressure-collecting device for closing bearings on long and narrow parts according to any one of claims 1 to 7, and the constant force pressure-collecting method comprises: Step 1: Check the structural integrity and surface cleanliness of the bearing before installation; Step 2, using the closing dies (62) at both ends of the bearing fixing die (6) to clamp the bearing, comprising: installing the bearing to be closed into the bearing mounting hole on the ear piece of the narrow and long part (1), passing the core shaft (61) through the bearing hole, and the closing dies (62) at both ends are arranged oppositely and connected to the two ends of the core shaft (61) with their annular blade structures, and both face the bearing direction, and the annular blade structures of the closing dies (62) at both ends are stuck in the groove of the bearing; Step 3, placing the bearing fixing die (6) between the pressing plate (43) and the baffle (72), the countersunk hole on the outer end surface of the closing die (62) at one end is matched and connected with the protrusion of the force sensor (71) arranged on the end surface of the baffle (72), and is close to the force sensor (71), and the closing die (62) at the other end is arranged close to the end surface of the pressing plate (43); Step 4, the electric cylinder (2) is started by the control system (9) and its actuating end is controlled to move toward one side of the bearing, and the pressing plate (43) of the pressing head assembly (4) is pushed to press against the other end closing die (62), and the pressure generated gradually increases to a set pressure value according to a preset loading rate, and under the action of the pressure, the axial direction of the bearing fixed die (6) is automatically perpendicular to the end surface of the baffle (72); Step 5, after the control system (9) detects that the pressure value fed back by the force sensor (71) reaches the set pressure value, it controls the electric cylinder (2) to drive the pressure head assembly (4) to automatically retreat after maintaining the pressure for a preset time, thereby completing the bearing closing operation.

9. The method for achieving bearing closing with constant force for narrow and long parts according to claim 8 is characterized in that: Also includes: Step 6, performing a closing quality inspection on the bearing after the closing operation is completed, wherein the quality inspection standards include: Appearance inspection of the bearing: wrinkles, cracks and burrs are not allowed at the closing part, extrusion marks are allowed, and the edge clearance at the closing part is less than 0.1mm; Check the no-load starting torque of the bearing, and make sure it meets the installation requirements; Check the axial thrust of the bearing. Under the specified axial thrust, there is no relative displacement between the bearing and the housing hole or the relative displacement does not exceed 0.1mm.

10. The method for achieving bearing closing with constant force for narrow and long parts according to claim 8, characterized in that: The method for determining the set pressure value in step 4 is: The baffle (72) in the baffle force measuring assembly (7) is deformed at a small angle under pressure conditions, so that the angle between the axis of the bearing fixed mold (6) and the normal of the baffle (72) is α; The pressure value fed back by the pressure sensor (71) is F1, and the axial pressure of the bearing fixed mold (6) is F2. When the control system (9) detects that the fed-back pressure value F1=F2cosα, it indicates that the axial pressure applied to the bearing fixed mold (6) has reached the set pressure value.

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