Pre-tightening device for bearing, rotating mechanism and PCB forming machine

Abstract

The utility model relates to the technical field of mechanical equipment manufacturing, and relates to a pre-tightening device for a bearing, a rotating mechanism and a PCB forming machine. The pre-tightening device for the bearing comprises a fixing base and a pre-tightening assembly. The fixed seat is provided with a containing cavity, the containing cavity is used for containing the bearing, the rotating shaft connected with the bearing is arranged in the containing cavity in a penetrating mode, and one movable part of the bearing is fixedly arranged relative to the rotating shaft; the pre-tightening assembly comprises a driving piece and a driving pressing plate, the driving piece is connected to the fixing base, the driving pressing plate is connected to the driving piece, the driving pressing plate abuts against the other movable part of the bearing, and the driving piece is used for applying driving force to the driving pressing plate so as to adjust the clearance of the bearing. When the pre-tightening device for the bearing is used, the driving piece and the driving pressing plate are arranged to be matched, the driving piece can apply pressure to the driving pressing plate, the clearance of the bearing is adjusted by adjusting the pre-load of the bearing, the clearance of the bearing can be adjusted on the premise that shutdown is not needed, the structure is simple, and the using effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical equipment manufacturing, in particular to a bearing preload device, a rotating mechanism and a PCB forming machine. Background Art

[0002] In the field of mechanical equipment such as precision machine tools and precision measuring instruments, in order to ensure the operating accuracy of the rotating mechanism, the bearings in the rotating mechanism need to be adjusted for clearance. Traditional bearing clearance adjustment methods include positioning preload and constant pressure preload. These two methods can only apply a fixed size preload after assembly. After the adjustment is completed, the equipment cannot change and adjust the preload during operation. In some occasions with higher performance and service life requirements, it is necessary to stop the machine frequently and adjust the preload accordingly according to the speed and load to achieve the best preload state under different speeds and loads. Not only is the equipment operating efficiency affected, but the equipment cannot be adjusted during operation, and the equipment accuracy is still affected.

[0003] Therefore, it is necessary to make improvements to the above problems in order to change the current situation. Utility Model Content

[0004] The utility model provides a bearing preload device, a rotating mechanism and a PCB forming machine, which are used to solve the problem that the bearing preload in the existing mechanical equipment adopts a fixed preload adjustment method, which affects the equipment operation efficiency and equipment accuracy.

[0005] The utility model provides a bearing preload device, comprising:

[0006] A fixing seat, provided with a receiving cavity, the receiving cavity is used to receive the bearing, a rotating shaft connected to the bearing is passed through the receiving cavity, and one of the movable parts of the bearing is fixedly arranged relative to the rotating shaft; and

[0007] The preload assembly includes a driving member and a driving pressure plate, wherein the driving member is connected to the fixed seat, the driving pressure plate is connected to the driving member, and the driving pressure plate abuts against another movable part of the bearing, and the driving member is used to apply a driving force to the driving pressure plate to adjust the clearance of the bearing.

[0008] According to one embodiment of the utility model, the preload device also includes an elastic component, which is respectively connected to the drive pressure plate and the bearing; a rotating hole connected to the accommodating cavity is opened inside the fixed seat, and the diameter of the accommodating cavity is different from the diameter of the rotating hole to form a step surface, and the bearing is spaced apart from the step surface, and the elastic component is used to apply elastic force toward the bearing so that the bearing has a tendency to reduce clearance.

[0009] According to an embodiment of the utility model, the elastic component includes at least one spring, the spring is accommodated in the accommodating cavity, and opposite ends of the spring are respectively in contact with the driving pressure plate and the bearing.

[0010] According to one embodiment of the utility model, the elastic component also includes a spring washer, the number of the spring washer is at least one, the spring washer is arranged between the bearing and the spring, and / or the spring washer is arranged between the driving pressure plate and the spring.

[0011] According to one embodiment of the utility model, the spring gasket includes a first gasket and a second gasket, the first gasket is provided with a first positioning groove, and the spring is accommodated in the first positioning groove, and the side of the first gasket away from the spring abuts against the bearing; the second gasket is provided with a second positioning groove, an end of the spring away from the first gasket is accommodated in the second positioning groove, and the side of the second gasket away from the spring abuts against the driving pressure plate.

[0012] According to an embodiment of the present invention, the springs are arranged around the rotating shaft; or the springs are provided in multiple groups, and the multiple groups of springs are evenly arranged along the circumferential direction of the rotating shaft.

[0013] According to one embodiment of the utility model, the preload device also includes a temperature sensor, the bearing includes a roller and two movable parts, the two movable parts are respectively connected to the driving pressure plate and the rotating shaft, the roller is arranged between the two movable parts, and the temperature sensor is in contact with at least one of the movable parts and is used to obtain the temperature signal of the movable part.

[0014] According to one embodiment of the utility model, the driving member includes a cylinder body, a piston and a pull rod, the cylinder body is connected to the fixed seat, and the cylinder body is used to connect to an external power source, the piston is movably accommodated in the cylinder body, the pull rod is connected to the piston and the driving pressure plate, and the power source is high-pressure gas or high-pressure liquid.

[0015] The utility model also provides a rotating mechanism, comprising:

[0016] Axis of rotation;

[0017] A bearing, comprising a first movable part, a second movable part and a roller, wherein the roller is disposed between the first movable part and the second movable part, and the first movable part is connected to the rotating shaft; and

[0018] In the preloading device as described in any one of the above items, the driving pressure plate is respectively connected to the driving member and the second movable part, and the driving member is used to drive the driving pressure plate to move axially along the bearing to adjust the clearance between the roller and the first movable part, and / or adjust the clearance between the roller and the second movable part.

[0019] According to one embodiment of the utility model, the rotating shaft includes a shaft body and a shoulder with a diameter larger than the shaft body, the first movable part is sleeved on the shaft body and abuts against the shoulder, and the rotating mechanism also includes a locking nut, which is threadedly connected to the shaft body and abuts against an end of the first movable part away from the shoulder.

[0020] The utility model also provides a PCB forming machine, comprising:

[0021] A carrier, used for carrying a PCB board; and

[0022] A rotary processing device comprises a rotary mechanism as described in any one of the above, and the rotary processing device is used to process the PCB board.

[0023] Implementing the embodiments of the utility model has the following beneficial effects:

[0024] When using the bearing preload device of this embodiment, by arranging the driving member and the driving pressure plate in cooperation, the driving member can apply pressure to the driving pressure plate, and adjust the bearing clearance by adjusting the preload of the bearing. At low speed and light load, the preload applied to the bearing can be increased, and at high speed and heavy load, the preload applied to the bearing can be reduced. The adjustment flexibility is high, and the bearing clearance can be adjusted without stopping. The structure is simple and the use effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] in:

[0027] Figure 1 is a cross-sectional schematic diagram of a rotating mechanism in an embodiment of the utility model;

[0028] Figure 2 yes Figure 1 A magnified view of the part A in the middle;

[0029] Figure 3yes Figure 1 A magnified view of the detail B in the middle;

[0030] Figure 4 is a cross-sectional schematic diagram of a pre-tightening assembly in an embodiment of the utility model;

[0031] Reference numerals:

[0032] 1. Rotating mechanism; 10. Pre-tightening device; 100. Fixed seat; 110. Accommodating cavity; 111. Step surface; 120. Rotating hole; 130. Mounting groove; 200. Pre-tightening assembly; 210. Driving member; 211. Cylinder body; 212. Piston; 213. Pull rod; 220. Driving pressure plate; 300. Elastic assembly; 310. Spring; 320. First gasket; 321. First positioning groove; 330. Second gasket; 331. Second positioning groove; 400. Temperature sensor; 20. Rotating shaft; 21. Shaft body; 22. Shoulder; 30. Bearing; 31. First movable part; 32. Second movable part; 33. Roller; 40. Locking nut. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] See also Figures 1 to 4 As shown, an embodiment of the utility model provides a preloading device 10 for a bearing, which includes a fixed seat 100 and a preloading assembly 200; the fixed seat 100 is provided with a connected accommodating cavity 110 and a rotating hole 120, the accommodating cavity 110 is used to accommodate a bearing 30, and a rotating shaft 20 connected to the bearing 30 is successively inserted into the rotating hole 120 and the accommodating cavity 110, and one of the movable parts of the bearing 30 is relatively fixedly arranged with the rotating shaft 20; the preloading assembly 200 includes a driving member 210 and a driving pressure plate 220, the driving member 210 is connected to the fixed seat 100, the driving pressure plate 220 is connected to the driving member 210, and the driving pressure plate 220 abuts against another movable part of the bearing 30, and the driving member 210 is used to apply a driving force to the driving pressure plate 220 to adjust the clearance of the bearing 30.

[0035] When the bearing preload device 10 of this embodiment is used, by arranging the driving member 210 and the driving pressure plate 220 to cooperate, the driving member 210 can drive the driving pressure plate 220 to move along the axial direction of the bearing 30, and the clearance of the bearing 30 can be adjusted without stopping the machine. The structure is simple and the use effect is good. Specifically, during the use of the bearing preload device 10, when the bearing 30 runs at a low speed and a light load, the preload applied to the bearing 30 can be increased, and when it is at a high speed and a heavy load, the preload applied to the bearing 30 can be reduced to reduce the temperature of the bearing 30 and increase the service life of the bearing 30, and the adjustment flexibility is high.

[0036] It should be noted that, in the prior art, bearings 30 that require clearance adjustment include but are not limited to tapered roller bearings, angular contact bearings, and thrust bearings. The bearing 30 includes a first movable part 31, a second movable part 32, and a roller 33. The roller 33 is arranged between the first movable part 31 and the second movable part 32. At this time, the first movable part 31 is connected to the rotating shaft 20, and the preload assembly 200 is in contact with the second movable part 32. The driving member 210 drives the driving pressure plate 220 to move axially along the bearing 30 to adjust the gap between the roller 33 and the first movable part 31 and / or the second movable part 32 to realize the clearance adjustment function of the bearing 30.

[0037] In some embodiments, when the bearing 30 is a tapered roller bearing or an angular contact bearing, the first movable portion 31 and the second movable portion 32 are respectively the inner ring and the outer ring of the bearing 30, the first movable portion 31 is sleeved on the rotating shaft 20, and the second movable portion 32 is sleeved on the outer side of the roller 33; when the bearing 30 is a thrust bearing, the first movable portion 31 and the second movable portion 32 are respectively the shaft ring and the seat ring of the bearing 30. Of course, when the bearing 30 in the above embodiments cooperates with the preload device 10, the clearance adjustment can be achieved by driving the driving plate 220 to move along the axial direction of the bearing 30 through the driving member 210.

[0038] Further, see Figure 1 and Figure 2 As shown, the preload device 10 also includes an elastic component 300, which is respectively connected to the drive pressure plate 220 and the bearing 30; the diameter of the accommodating cavity 110 is different from the diameter of the rotating hole 120 to connect and form a step surface 111, and the bearing 30 is spaced apart from the step surface 111, and the elastic component 300 is used to apply an elastic force toward the bearing 30 so that the bearing 30 has a tendency to reduce the clearance.

[0039] In this embodiment, by arranging the elastic component 300 between the driving pressure plate 220 and the bearing 30, the elastic component 300 can apply a certain thrust toward the bearing 30 in the direction away from the driving pressure plate 220 under the elastic force, so that the bearing 30 reaches a negative clearance; thereafter, during the rotation of the rotating shaft 20, the driving pressure plate 220 can be driven by the driving member 210 to move along the axial direction of the bearing 30 to achieve clearance adjustment, and the elastic component 300 provides a continuous pressing force for the bearing 30. In addition, by arranging a gap between the end of the bearing 30 and the stepped surface 111, the gap can be regarded as the movable space of the bearing 30, thereby avoiding contact interference between the driving pressure plate 220 and the stepped surface 111 when the bearing 30 is driven by the driving pressure plate 220 to adjust the clearance. Of course, the distance between the stepped surface 111 and the bearing 30 is usually set to be greater than the clearance adjustment range of the bearing 30, so as to avoid contact with the stepped surface 111 after the bearing 30 exceeds the adjustment range.

[0040] Specifically, the elastic component 300 includes at least one spring 310 . The spring 310 is accommodated in the accommodating cavity 110 , and opposite ends of the spring 310 abut against the driving pressure plate 220 and the bearing 30 , respectively.

[0041] By arranging the spring 310 to contact the driving pressure plate 220 and the bearing 30 respectively, when the driving member 210 drives the driving pressure plate 220 to move toward the bearing 30, the spring 310 can be compressed and provide a certain buffering effect for the relative movement between the driving pressure plate 220 and the bearing 30, thereby avoiding damage to the bearing 30 when the bearing 30 forms a negative clearance, and the bearing 30 can be pre-tightened by the elastic force.

[0042] In one embodiment, the spring 310 is disposed around the rotating shaft 20 .

[0043] In this embodiment, the spring 310 can be a coil spring and is arranged around the rotating shaft 20. At this time, the driving pressure plate 220 can also be at least partially arranged around the rotating shaft 20 and in contact with the spring 310, or in contact with part of the structure of the spring 310, both of which can realize the preload adjustment function of the preload assembly 200.

[0044] In another embodiment, the number of the springs 310 is multiple groups, and the multiple groups of springs 310 are evenly arranged along the circumferential direction of the rotating shaft 20 .

[0045] In this embodiment, a plurality of separate springs 310 are arranged around the rotating shaft 20, and each spring 310 is in contact with the driving plate 220, thereby ensuring the elastic uniformity of the elastic component 300. In any of the above embodiments, the spring 310 includes but is not limited to a coil spring, a leaf spring, and a disc spring, which are selected according to the layout requirements of the spring 310.

[0046] Further, see Figure 2 As shown, the elastic component 300 also includes a spring washer, the number of which is at least one, and the spring washer is arranged between the bearing 30 and the spring 310 , and / or the spring washer is arranged between the driving pressure plate 220 and the spring 310 .

[0047] By arranging a spring washer between the spring 310 and the driving pressure plate 220 and / or the bearing 30, the contact area between the spring 310 and the spring washer can be effectively increased so that the spring 310 applies force evenly, and when the spring washer is worn, it can be easily replaced, thereby reducing the cost of use.

[0048] Specifically, see Figure 2 As shown, the spring gasket includes a first gasket 320 and a second gasket 330. The first gasket 320 is provided with a first positioning groove 321, and the spring 310 is accommodated in the first positioning groove 321, and the side of the first gasket 320 away from the spring 310 abuts against the bearing 30; the second gasket 330 is provided with a second positioning groove 331, and the end of the spring 310 away from the first gasket 320 is accommodated in the second positioning groove 331, and the side of the second gasket 330 away from the spring 310 abuts against the driving pressure plate 220.

[0049] In this embodiment, by respectively providing the first gasket 320 and the second gasket 330 on opposite sides of the spring 310, when the first gasket 320 and the second gasket 330 contact the spring 310, the first positioning groove 321 and the second positioning groove 331 can cooperate with the spring 310 and position the installation position of the spring 310 to prevent the spring 310 from loosening, thereby improving the installation accuracy and installation reliability of the spring 310.

[0050] Further, see Figure 3 As shown, the preload device 10 also includes a temperature sensor 400, the bearing 30 includes a roller 33 and two movable parts, the two movable parts are respectively connected to the driving pressure plate 220 and the rotating shaft 20, the roller 33 is arranged between the two movable parts, and the temperature sensor 400 is in contact with at least one of the movable parts and is used to obtain the temperature signal of the movable part.

[0051] In a preferred embodiment, the preload device 10 also includes a control module, or the temperature sensor 400 is connected to an external control module, and the control module is connected to the drive member 210 signal; by setting the temperature sensor 400 in contact with the bearing 30, the temperature sensor 400 can obtain the temperature signal of the bearing 30 and transmit it to the control module, and control the drive member 210 according to a preset program to adjust the axial position of the drive pressure plate 220 in the bearing 30; specifically, when the temperature of the bearing 30 exceeds a threshold value during operation, the drive member 210 drives the drive pressure plate 220 to move in a direction away from the bearing 30 to increase the clearance of the bearing 30; when the bearing 30 does not exceed the threshold value, the drive member 210 can be controlled to drive the drive pressure plate 220 to move toward the bearing 30 and apply a preload force to the bearing 30.

[0052] Specifically, the fixing seat 100 is provided with a mounting groove 130 connected to the accommodating cavity 110, the opening of the mounting groove 130 is located on the inner wall of the accommodating cavity 110, and the temperature sensor 400 is embedded in the mounting groove 130. The temperature sensor 400 can be used to contact the outer ring, shaft ring or seat ring of the bearing 30, and at the same time, the combined structure of the temperature sensor 400 and the fixing seat 100 can be compact.

[0053] In one embodiment, the driving member 210 includes a cylinder body 211, a piston 212 and a pull rod 213. The cylinder body 211 is connected to the fixed seat 100, and the cylinder body 211 is used to connect to an external power source. The piston 212 can be movably accommodated in the cylinder body 211. The pull rod 213 is connected to the piston 212 and the driving pressure plate 220. The power source is high-pressure gas or high-pressure liquid.

[0054] With this arrangement, the piston 212 can be driven to move relative to the cylinder body 211 by adjusting the power source in the cylinder body 211, and the pull rod 213 can be connected to the driving platen 220 by means of screws, pins, magnetism, etc., so as to assemble and replace the pull rod 213. In other embodiments, the driving member 210 can also be an electric push rod. In some embodiments, the cylinder body 211 can also be formed inside the fixed seat 100, and the piston 212 can be slidably matched with the fixed seat 100, so that the overall structure of the fixed seat 100 and the preload assembly 200 can be compact.

[0055] See also Figure 1As shown, the utility model also provides a rotating mechanism 1, which includes a rotating shaft 20, a bearing 30 and a preload device 10 in any one of the above-mentioned embodiments; the bearing 30 includes a first movable part 31, a second movable part 32 and a roller 33, the roller 33 is arranged between the first movable part 31 and the second movable part 32, and the first movable part 31 is connected to the rotating shaft 20; the driving pressure plate 220 of the preload device 10 is respectively connected to the driving member 210 and the second movable part 32, and the driving member 210 is used to drive the driving pressure plate 220 to move along the axial direction of the bearing 30 to adjust the clearance between the roller 33 and the first movable part 31, and / or adjust the clearance between the roller 33 and the second movable part 32.

[0056] It can be understood that, in the rotating mechanism 1 of the present embodiment, by setting the preload device 10 in any one of the above-mentioned embodiments, when using the bearing preload device 10 of the present embodiment, by setting the driving member 210 and the driving pressure plate 220 to cooperate, the driving member 210 can drive the driving pressure plate 220 to move along the axial direction of the bearing 30. During the operation of the rotating mechanism 1, the clearance of the bearing 30 can be adjusted without stopping, and the structure is simple and the use effect is good.

[0057] See also Figure 1 As shown, in one embodiment, the rotating shaft 20 includes a shaft body 21 and a shoulder 22 whose diameter is larger than that of the shaft body 21, the first movable part 31 is sleeved on the shaft body 21 and abuts against the shoulder 22, and the rotating mechanism 1 also includes a locking nut 40, which is threadedly connected to the shaft body 21 and abuts against an end of the first movable part 31 away from the shoulder 22.

[0058] When assembling the rotating mechanism 1 of this embodiment, first, the bearing 30 is sleeved on the rotating shaft 20, and one end of the first movable part 31 of the bearing 30 is abutted against the shaft shoulder 22, and then the locking nut 40 is threadedly matched with the shaft body 21 and abutted against the other end of the first movable part 31 to fix the bearing 30 on the rotating shaft 20; then, the bearing 30 is inserted into the accommodating cavity 110, and the driving pressure plate 220 can be driven to move by starting the driving member 210 to adjust the clearance of the bearing 30, and the preload force can be applied to the second movable part 32 by the set elastic component 300.

[0059] The utility model also provides a PCB forming machine, which includes a carrier and a rotary processing device, wherein the carrier is used to carry a PCB board; the rotary processing device includes a rotary mechanism in any one of the above embodiments, and the rotary processing device is used to process the PCB board.

[0060] In the PCB forming machine of this embodiment, the rotating mechanism can be used in processing devices such as drill bits, and can also be used in other rotating transmission structures in the PCB forming machine. By using the bearing preload device 10, the clearance of the bearing 30 can be adjusted without stopping the machine, thereby effectively improving the reliability and durability of the PCB forming machine.

[0061] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0062] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0063] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A bearing preload device, characterized in that: include: A fixing seat, provided with a receiving cavity, the receiving cavity is used to receive the bearing, a rotating shaft connected to the bearing is passed through the receiving cavity, and one of the movable parts of the bearing is fixedly arranged relative to the rotating shaft; and The preload assembly includes a driving member and a driving pressure plate, wherein the driving member is connected to the fixed seat, the driving pressure plate is connected to the driving member, and the driving pressure plate abuts against another movable part of the bearing, and the driving member is used to apply a driving force to the driving pressure plate to adjust the clearance of the bearing.

2. The bearing preload device according to claim 1, characterized in that: The preload device also includes an elastic component, which is respectively connected to the driving pressure plate and the bearing; a rotating hole connected to the accommodating cavity is opened inside the fixed seat, the diameter of the accommodating cavity is different from the diameter of the rotating hole to form a step surface, and the bearing is spaced apart from the step surface, and the elastic component is used to apply elastic force toward the bearing so that the bearing has a tendency to reduce clearance.

3. The bearing preload device according to claim 2, characterized in that: The elastic component includes at least one spring, the spring is accommodated in the accommodating cavity, and opposite ends of the spring are respectively in contact with the driving pressure plate and the bearing.

4. The bearing preload device according to claim 3, characterized in that: The elastic component further includes a spring washer, the number of which is at least one, and the spring washer is arranged between the bearing and the spring, and / or the spring washer is arranged between the driving pressure plate and the spring.

5. The bearing preload device according to claim 4, characterized in that: The spring gasket includes a first gasket and a second gasket, the first gasket is provided with a first positioning groove, and the spring is accommodated in the first positioning groove, and the side of the first gasket away from the spring abuts against the bearing; the second gasket is provided with a second positioning groove, an end of the spring away from the first gasket is accommodated in the second positioning groove, and the side of the second gasket away from the spring abuts against the driving pressure plate.

6. The bearing preload device according to any one of claims 3 to 5, characterized in that: The springs are arranged around the rotating shaft; or the springs are in multiple groups, and the multiple groups of springs are evenly arranged along the circumferential direction of the rotating shaft.

7. The bearing preload device according to claim 1, characterized in that: The preload device also includes a temperature sensor. The bearing includes a roller and two movable parts. The two movable parts are respectively connected to the driving pressure plate and the rotating shaft. The roller is arranged between the two movable parts. The temperature sensor is in contact with at least one of the movable parts and is used to obtain a temperature signal of the movable part.

8. The bearing preload device according to claim 1, characterized in that: The driving member includes a cylinder body, a piston and a pull rod. The cylinder body is connected to the fixed seat and is used to connect to an external power source. The piston is movably accommodated in the cylinder body. The pull rod is connected to the piston and the driving pressure plate. The power source is high-pressure gas or high-pressure liquid.

9. A rotating mechanism, characterized in that: include: Axis of rotation; A bearing, comprising a first movable part, a second movable part and a roller, wherein the roller is arranged between the first movable part and the second movable part, and the first movable part is connected to the rotating shaft; as well as According to the preloading device as described in any one of claims 1 to 8, the driving pressure plate is respectively connected to the driving member and the second movable part, and the driving member is used to drive the driving pressure plate to move axially along the bearing to adjust the clearance between the roller and the first movable part, and / or adjust the clearance between the roller and the second movable part.

10. The rotating mechanism according to claim 9, characterized in that: The rotating shaft includes a shaft body and a shoulder with a diameter larger than the shaft body, the first movable part is sleeved on the shaft body and abuts against the shoulder, and the rotating mechanism also includes a locking nut, which is threadedly connected to the shaft body and abuts against an end of the first movable part away from the shoulder.

11. A PCB forming machine, characterized in that: include: A carrier, used to carry the PCB board; as well as A rotary processing device, comprising the rotary mechanism as claimed in claim 9 or 10, wherein the rotary processing device is used to process the PCB board.

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