Large spherical hinge joint bearing clearance detection device
By designing a clearance detection device for large ball hinged joint bearings, the problem of inability to effectively detect the clearance value of this type of bearing in the prior art is solved, and accurate measurement of the axial and radial clearance of the bearing is achieved, and product development and customer needs are met.
Patent Information
- Application Number
- CN202421277190.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-05
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-06-05
AI Technical Summary
The prior art lacks the clearance value that can effectively detect the large ball hinge joint bearings of aerospace automatic incliners, especially in complex structures and large-size products, which cannot meet the development, production and customer needs of new products.
A large ball hinged joint bearing clearance detection device is designed, including a first clamping assembly, a second clamping assembly, a movable member and a driving member. By clamping the inner ring and the double half outer ring of the bearing, the measurement of axial and radial clearance is achieved.
Accurate measurement of the axial and radial clearance of large ball hinged joint bearings is achieved, which meets product development, production and customer needs, and improves the performance and stability of bearings.
Smart Images
Figure CN222670933U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of bearing detection devices, in particular to a large ball joint bearing clearance detection device. Background Art
[0002] With the development of aerospace technology, people have higher and higher requirements on the performance of aircraft components. The large ball joint bearing of the aerospace automatic tilt mechanism is a key component of aircraft components. The large ball joint product consists of an inner sleeve, two half outer sleeves and a spacer. At the same time, the parts of the large ball joint product are thin-walled and easy to deform. They are easily deformed by external forces and the overall dimensions are larger than those of conventional joint bearings. When installed or fixed improperly, the bearing clearance value is significantly affected. Clearance is an important performance indicator of bearings. The size and stability of the clearance are the basis for assessing the quality of the mutual movement of the inner and outer friction pairs of a set of bearings. The larger the clearance, the greater the vibration of the bearing during operation. If the clearance is too small, it means that the gap between the inner and outer rings of the bearing is small, which is prone to poor lubrication and poor flexibility after heating. Therefore, the clearance needs to be precisely controlled within the design range according to the product use conditions, so as to bring out the best performance of the bearing; this product structure currently has no ready-made measuring instruments / equipment or successful experience to learn from and apply at home and abroad, lacks the detection technology of the clearance of the large ball joint structure, and cannot meet the needs of new product development, production and customers. Therefore, it is necessary to make a set of large ball joint clearance detection device to meet the requirements. The schematic diagram of the large ball joint bearing is shown in the figure. Figure 1 As shown, the following difficulties need to be considered before designing this detection device:
[0003] (1) The structure of the large ball joint bearing is complex: the outer ring of the bearing is composed of two half outer rings and a spacer, all of which are made of aluminum alloy and are large in size. They are thin-walled parts that are easy to deform. The dimensional accuracy, roughness, and shape and position tolerance of the detection device will affect the deformation of the outer ring, and thus affect the detection value;
[0004] (2) Large product size: The outer dimensions of the bearing far exceed the size range of the clearance measuring instrument on the market, which requires a new self-designed clearance measuring device that meets the requirements of existing products;
[0005] (3) Bidirectional clearance: No measuring instrument on the market can measure the clearance value under this structural state. In addition, when measuring radial and axial clearance on the market, both measuring instruments must be used for measurement. It is impossible to measure radial and axial clearance values on one measuring instrument at the same time.
[0006] (4) Load value requirement: When measuring radial and axial clearances, a load must be applied to the bearing. Utility Model Content
[0007] In view of the deficiencies in the prior art, the utility model provides a large ball joint bearing clearance detection device for detecting the axial clearance and radial clearance of the bearing.
[0008] In order to achieve the above object, the utility model is realized by the following technical solutions:
[0009] A large ball joint bearing clearance detection device includes a first clamping component, a second clamping component, a movable part and two driving components. The movable part is sleeved on the first clamping component and can move up and down relative to the first clamping component. The second clamping component is placed on the movable part. The first clamping component is used to clamp the inner ring of the bearing along the axial direction of the bearing. The second clamping component is used to clamp the double half outer rings of the bearing along the axial direction of the bearing. The two driving components are respectively connected to the two ends of the second clamping component to drive the second clamping component to perform horizontal reciprocating movement.
[0010] Furthermore, the first clamping assembly includes a core shaft and an inner ring pressure plate, the core shaft includes a first shaft section and a second shaft section located below the first shaft section, the first shaft section and the second shaft section are coaxially connected, the inner ring pressure plate is detachably installed on the top of the first shaft section, the outer diameters of the inner ring pressure plate and the second shaft section are both larger than the outer diameter of the first shaft section, and the inner ring pressure plate and the second shaft section cooperate to clamp the inner ring of the bearing sleeved on the second shaft section.
[0011] Furthermore, the second clamping assembly includes an outer ring base and an outer ring pressure plate, the outer ring pressure plate is detachably mounted on the top of the outer ring base, a first convex ring is provided on the inner wall of the center hole of the outer ring base, a second convex ring is provided on the inner wall of the center hole of the outer ring pressure plate, and an annular clamping cavity for accommodating the double half outer rings of the bearing is formed between the first convex ring and the second convex ring, and the first convex ring and the second convex ring cooperate to clamp the double half outer rings of the bearing.
[0012] Furthermore, the clamping force of the first convex ring and the second convex ring on each half outer ring of the bearing is applied between the inner spherical surface and the outer peripheral surface of the half outer ring.
[0013] Furthermore, the driving member has a horizontal telescopic rod, and the telescopic rods of the two driving members are located on the same straight line, which passes through the core of the core shaft.
[0014] Furthermore, the driving member is a cylinder, the telescopic rod is a piston rod, a movable groove is provided on the piston rod, the movable groove extends along the length direction of the piston rod, and the outer ring base is hinged to the piston rod via a rotating shaft inserted in the movable groove.
[0015] Furthermore, the movable part is a threaded collar, the surface of the second shaft section is provided with an external thread matching the internal thread of the threaded collar, the threaded collar is threadedly sleeved on the second shaft section, and the outer ring base is placed on the threaded collar.
[0016] Furthermore, a plurality of ball head rods are connected to the outer peripheral surface of the threaded collar.
[0017] The utility model has the following beneficial effects:
[0018] The inner ring of the bearing is fixed to the first clamping assembly, and the double half outer ring of the bearing is fixed to the second clamping assembly, so that the double half outer ring is fitted into a whole, and the bearing is fitted into a complete outer ring and inner ring on the detection device. When measuring the axial clearance, the movable part pushes the second clamping assembly to drive the double half outer ring of the bearing to move upward when it moves upward. When the movable part moves downward to reset, the second clamping assembly and the double half outer ring fall and reset under the action of gravity. The distance that the outer ring moves up and down is the axial clearance measurement value; when measuring the radial clearance, the two driving parts apply loads in the left and right directions of the bearing to realize the left and right movement of the outer ring of the bearing. The distance that the outer ring moves left and right is the radial clearance measurement value. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a structural schematic diagram of a large ball hinge joint bearing of an embodiment of the utility model;
[0020] Figure 2 It is a schematic diagram of a large ball joint bearing clearance detection device according to an embodiment of the utility model. DETAILED DESCRIPTION
[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0022] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.
[0023] like Figure 1 to Figure 2As shown, this embodiment discloses a large ball joint bearing clearance detection device, which is fixed on a platform 1 for use. The specific structure includes a first clamping assembly, a second clamping assembly, a movable member 2 and two driving members 5. The movable member 2 is sleeved on the first clamping assembly and can move up and down relative to the first clamping assembly. The second clamping assembly is placed on the movable member 2. The first clamping assembly is used to clamp the inner ring 9 of the bearing along the axial direction of the bearing, and the second clamping assembly is used to clamp the double half outer ring 8 of the bearing along the axial direction of the bearing. The two driving members 5 are respectively connected to the two ends of the second clamping assembly to drive the second clamping assembly to move horizontally back and forth. The inner ring 9 of the bearing is fixed to the first clamping assembly, and the double half outer ring 8 of the bearing is fixed to the second clamping assembly, so that the double half outer ring 8 is fitted into a whole, and the bearing is fitted into a complete outer ring and inner ring 9 on the detection device. When measuring the axial clearance, the movable part 2 moves upward to push the second clamping assembly to drive the double half outer ring 8 of the bearing to move upward. When the movable part 2 moves downward to reset, the second clamping assembly and the double half outer ring 8 fall and reset under the action of gravity, so that the outer ring can move upward. The distance the outer ring moves up and down is the measured value of the axial clearance; when measuring the radial clearance, the two driving parts 5 apply loads in the left and right directions of the bearing respectively to realize the left and right movement of the outer ring of the bearing. The distance the outer ring moves left and right is the measured value of the radial clearance.
[0024] In this embodiment, the first clamping assembly includes a core shaft 10 and an inner ring pressure plate 11. The core shaft 10 includes a first shaft segment 101 and a second shaft segment 102 located below the first shaft segment 101. The first shaft segment 101 and the second shaft segment 102 are coaxially connected. The inner ring pressure plate 11 is detachably installed on the top of the first shaft segment 101. The outer diameters of the inner ring pressure plate 11 and the second shaft segment 102 are both larger than the outer diameter of the first shaft segment 101. The inner ring pressure plate 11 and the second shaft segment 102 cooperate to clamp the inner ring 9 of the bearing sleeved on the second shaft segment 102.
[0025] In this embodiment, the second clamping assembly includes an outer ring base 4 and an outer ring pressure plate 7. The outer ring pressure plate 7 is detachably mounted on the top of the outer ring base 4. A first convex ring 41 is provided on the inner wall of the center hole of the outer ring base 4. A second convex ring 71 is provided on the inner wall of the center hole of the outer ring pressure plate 7. An annular clamping cavity for accommodating the double half outer rings 8 of the bearing is formed between the first convex ring 41 and the second convex ring 71. The first convex ring 41 and the second convex ring 71 cooperate to clamp the double half outer rings 8 of the bearing.
[0026] Preferably, the first convex ring 41 and the second convex ring 71 apply the clamping force on each half outer ring 8 of the bearing between the inner spherical surface and the outer peripheral surface of the half outer ring 8, thereby minimizing the contact area with the end face of the outer ring of the bearing and only reducing the measurement error caused by the clamping force.
[0027] In this embodiment, the driving member 5 has a horizontal telescopic rod, and the telescopic rods of the two driving members 5 are located on the same straight line, which passes through the axis of the core shaft 10.
[0028] In this embodiment, the driving member 5 is a cylinder, the telescopic rod is a piston rod 6, a movable groove 61 is provided on the piston rod 6, the movable groove 61 extends along the length direction of the piston rod 6, and the outer ring base 4 is hinged to the piston rod 6 via a rotating shaft inserted in the movable groove 61. In other embodiments, the driving member 5 is not limited to a cylinder, and may also be an electric push rod, for example.
[0029] In this embodiment, the movable part 2 is a threaded collar 2, the surface of the second shaft section 102 is provided with an external thread matching the internal thread of the threaded collar 2, the threaded collar 2 is sleeved on the second shaft section 102 through a thread, and the outer ring base 4 is placed on the threaded collar 2. When the threaded collar 2 rotates through the thread, the outer ring base 4 and the outer ring pressure plate 7 are driven to move synchronously, so that the double half outer rings 8 move up and down along the axial direction.
[0030] The technical solution of the utility model is: starting from the traditional clearance measurement principle and relevant standards, according to the requirements of the large ball joint bearing installation mechanism and the operating mechanism, a device for measuring the interface axial clearance of the product is designed; because the outer ring of the large ball joint product is composed of two semi-outer rings and a spacer, the end face and the base are fixed to the inner hole clamping method to fix the outer ring and the end face of the bearing, so that the outer ring is fitted into a whole, and the product is fitted with a complete outer ring and inner ring, so that the radial and axial clearance values of the product can be conveniently measured.
[0031] Considering the great influence of ambient temperature on product size, the parts of the detection device that contact the product are all made of aluminum alloy. In order to reduce the slight influence of the shape and position error of the detection device on the entire large ball joint after installation, the processing accuracy of the entire detection device is improved during the design and processing of the detection device, and in order to reduce the influence of the shape and position tolerance of the product on the detection value; while ensuring the stability of the installation, the area of the contact surface between the detection device and the product is deliberately reduced to reduce the influence of the deformation of the outer ring on the measurement value.
[0032] Considering that large ball joint bearings are installed in the axial direction, and in order to be able to measure the radial and axial clearance values on a set of equipment at the same time, it is necessary to design the product to be placed in the axial direction so that the radial and axial clearance values can be measured at the same time.
[0033] When measuring the axial clearance, the weight of the outer ring of the bearing and the second clamping assembly that fixes the outer ring can enable the entire outer ring to move downward. At the same time, a threaded ring 2 is designed. By moving the threaded ring 2 upward, the outer ring can move upward. The distance the outer ring moves up and down is the measured value of the axial clearance; when measuring the radial clearance, a cylinder is used to apply load in the left and right directions of the bearing to enable the outer ring of the bearing to move left and right. The distance the outer ring moves left and right is the measured value of the radial clearance.
[0034] As a preferred embodiment, a plurality of ball head rods 3 are connected to the outer peripheral surface of the threaded collar 2 to facilitate the rotation of the threaded collar 2. In other embodiments, the ball head rod 3 may also be replaced by a handle of other shapes, such as a U-shaped rod.
[0035] Technical innovations of this detection device:
[0036] (1) The fixing and clamping method is excellent. The center hole of the outer ring base 4 is used to fix the double half outer ring 8 of the bearing, and the end faces of the double half outer ring 8 are fixed by axial clamping. In addition, the clamping force (the contact area of the end faces of the double half outer ring 8) is applied between the inner spherical surface and the outer diameter surface of the outer ring, which can minimize the measurement error caused by the clamping force. This solution can make the double half outer ring 8 fit into a whole.
[0037] (2) Bidirectional measuring device. Considering that large ball joint bearing products need to measure radial and axial clearances, it is necessary to design a detection device that can simultaneously meet the radial and axial clearance measurement requirements, that is, to measure the axial clearance and radial clearance separately without disassembling the product and the detection device.
[0038] (3) Load device. In order to meet the load requirements, a simple load device is designed, which can realize the up and down and left and right movement of the outer ring and is easy to operate.
[0039] The use of this detection device:
[0040] (1) Step 1: Place the mandrel 10 on the platform and tighten it with screws;
[0041] (2) Step 2: Place the outer ring, inner ring 9, spacer, and outer ring of the large ball joint bearing on the outer ring base 4 in sequence, place the outer ring pressure plate 7 on the end face of the outer ring, and tighten the screws with a torque wrench to ensure that each position is evenly stressed;
[0042] (3) Step 3, place the inner ring 9 of the large ball hinge bearing on the mandrel 10, and place the inner ring pressure plate 11 on the end surface of the inner ring 9 and lock it with a nut;
[0043] (4) Step 4, use the ball head rod 3 to rotate the threaded collar 2 to make the threaded collar 2 move up and down; use a micrometer probe (axial clearance measuring gauge, radial clearance measuring gauge) to be placed vertically on the outer ring pressure plate 7, and rotate the threaded collar 2 so that its plane is in contact with and parallel to the plane of the outer ring base 4; fine-tune the threaded collar 2 so that the outer ring base 4 is at the lowest point, and record the micrometer value A; then rotate the threaded collar 2 to move the outer ring upward, and when the outer ring moves to the highest point, record the micrometer value B; the difference between the value A and the value B is the axial clearance value;
[0044] (5) Step 5, fine-tune the rotating threaded collar 2. When the value of the dial gauge is (value A + value B) / 2 recorded in step 4, fix the threaded collar 2 and measure the radial clearance of the bearing at its position. This position can ensure that the center positions of the inner and outer rings are in the same horizontal direction.
[0045] (6) Step 6: Using the cylinders in the left and right directions, first use the right cylinder to move the outer ring toward the left through the piston rod 6, then record the micrometer value A, and then the right cylinder contracts; at the same time, use the same steps to move the outer ring cylinder toward the right through the piston rod 6 of the left cylinder, then record the micrometer value B, and then the left cylinder contracts; the difference between the values A and B is the radial clearance value of the bearing.
[0046] As described above, the 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, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents. These modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model. Therefore, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the protection scope of the utility model.
Claims
1. A large ball joint bearing clearance detection device, characterized in that: It includes a first clamping component, a second clamping component, a movable part and two driving parts. The movable part is sleeved on the first clamping component and can move up and down relative to the first clamping component. The second clamping component is placed on the movable part. The first clamping component is used to clamp the inner ring of the bearing along the axial direction of the bearing. The second clamping component is used to clamp the double half outer rings of the bearing along the axial direction of the bearing. The two driving parts are respectively connected to the two ends of the second clamping component to drive the second clamping component to move horizontally back and forth.
2. The large ball joint bearing clearance detection device according to claim 1 is characterized in that: The first clamping assembly includes a core shaft and an inner ring pressure plate. The core shaft includes a first shaft section and a second shaft section located below the first shaft section. The first shaft section and the second shaft section are coaxially connected. The inner ring pressure plate is detachably installed on the top of the first shaft section. The outer diameters of the inner ring pressure plate and the second shaft section are both larger than the outer diameter of the first shaft section. The inner ring pressure plate and the second shaft section cooperate to clamp the inner ring of the bearing sleeved on the second shaft section.
3. The large ball joint bearing clearance detection device according to claim 2 is characterized in that: The second clamping assembly includes an outer ring base and an outer ring pressure plate. The outer ring pressure plate is detachably mounted on the top of the outer ring base. A first convex ring is provided on the inner wall of the center hole of the outer ring base. A second convex ring is provided on the inner wall of the center hole of the outer ring pressure plate. An annular clamping cavity for accommodating the double half outer rings of the bearing is formed between the first convex ring and the second convex ring. The first convex ring and the second convex ring cooperate to clamp the double half outer rings of the bearing.
4. The large ball joint bearing clearance detection device according to claim 3 is characterized in that: The clamping force of the first convex ring and the second convex ring on each half outer ring of the bearing is applied between the inner spherical surface and the outer peripheral surface of the half outer ring.
5. The large ball joint bearing clearance detection device according to claim 3 is characterized in that: The driving member has a horizontal telescopic rod, and the telescopic rods of the two driving members are located on the same straight line, which passes through the axis core of the core shaft.
6. The large ball joint bearing clearance detection device according to claim 5 is characterized in that: The driving member is a cylinder, the telescopic rod is a piston rod, a movable groove is provided on the piston rod, the movable groove extends along the length direction of the piston rod, and the outer ring base is hinged to the piston rod through a rotating shaft inserted in the movable groove.
7. The large ball joint bearing clearance detection device according to claim 3 is characterized in that: The movable part is a threaded collar, the surface of the second shaft section is provided with an external thread matching the internal thread of the threaded collar, the threaded collar is sleeved on the second shaft section through a thread, and the outer ring base is placed on the threaded collar.
8. The large ball joint bearing clearance detection device according to claim 7 is characterized in that: A plurality of ball head rods are connected to the outer peripheral surface of the threaded collar.