Bearing assembly

Abstract

The utility model discloses a bearing assembly. The bearing assembly comprises a base, a bearing piece and a locking assembly. The bearing piece is installed on the base through a pivot shaft and provided with a clamping channel penetrating through the upper surface of the bearing piece, the extending direction of the clamping channel is located in the upper surface, and the axis of the pivot shaft is parallel to the upper surface and intersects with the extending direction of the clamping channel. The locking assembly is arranged between the base and the bearing piece and used for fixing the bearing piece. According to the detection device, the clamping channel on the upper surface of the bearing piece is used for clamping and fixing the columnar detected product, the inclination angle of the clamping channel can be changed by rotating the bearing piece, then the pose of the detected product is changed, the detected product can be detected from multiple perspectives or the diameters of different positions of the detected product can be obtained, and the detection accuracy is improved. Multi-attitude measurement can be completed without detaching the detected product from the bearing assembly, and the detection efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of product testing technology, and in particular to a support component. Background Technology

[0002] Pipes, bars, and other columnar products are widely used in industrial production, and accurate measurement of their dimensions is a crucial aspect of quality control.

[0003] In related technologies, when inspecting high-precision products or irregularly shaped cylindrical products, the product to be tested is installed in a clamping fixture and then inspected using a laser measuring instrument.

[0004] However, when testing different positions of the product to obtain its diameter at different locations, it is necessary to switch the product's orientation and reinstall it on the clamping fixture according to the specified orientation. This causes operational inconvenience and reduces testing efficiency. Utility Model Content

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of this invention is to provide a support component that allows adjustment of the position and orientation of the product being tested on the support component by rotating it. This enables the measurement of diameters at different positions without removing the product from the support component, thus completing multi-position measurements and improving testing efficiency.

[0006] This utility model embodiment provides a support assembly, which includes a base, a support member, and a locking assembly. The support member is mounted on the base via a pivot and has a clamping channel penetrating the upper surface of the support member. The extension direction of the clamping channel is located within the upper surface. The axis of the pivot is parallel to the upper surface and intersects the extension direction of the clamping channel. The locking assembly is disposed between the base and the support member for fixing the support member.

[0007] In some embodiments, the clamping channel extends perpendicular to the axis of the pivot shaft.

[0008] In some embodiments, the clamping channels include a plurality of channels spaced apart along the axial direction of the pivot axis.

[0009] In some embodiments, each of the clamping channels includes a pair of opposing sidewalls, the spacing between the sidewalls gradually decreasing in a depth direction away from the upper surface of the support; the entrance width and vertical depth of the plurality of clamping channels increase sequentially along the axial direction of the pivot axis.

[0010] In some embodiments, the base is provided with a first shaft hole, the pivot shaft is fixed to the support and at least one end extends out of the support to be rotatably connected to the first shaft hole; the locking assembly includes a locking hole and a locking pin, the locking hole is opened on the base and communicates with the first shaft hole; the locking pin is threaded to the locking hole, extends into the first shaft hole and radially abuts against the circumferential surface of the pivot shaft to limit the rotation of the pivot shaft.

[0011] In some embodiments, the base is provided with two first shaft holes spaced apart along the axis of the pivot shaft, and the support members extend from both ends of the pivot shaft and are rotatably connected to the two first shaft holes respectively.

[0012] In some embodiments, the support assembly further includes an adjustment drive connected to the pivot axis to drive the support assembly to pivot relative to the base.

[0013] In some embodiments, the base includes two upright plates perpendicular to the axis and a connecting plate connected between the two upright plates; two first shaft holes are respectively formed on the two upright plates, and the connecting plate is located below the support and configured to limit the downward rotation of the support when it abuts against the lower surface of the support.

[0014] In some embodiments, the support member is provided with a second shaft hole for mounting the pivot shaft and a first radial hole communicating with the second shaft hole; the support assembly further includes a first fixing member, which extends into the second shaft hole through the first radial hole and is used to fix the support member and the pivot shaft when radially abutting the circumferential surface of the pivot shaft.

[0015] In some embodiments, the support member is further provided with a second radial hole communicating with the second shaft hole, the second radial hole having a different circumferential angle from the first radial hole; the support assembly further includes a second fixing member, the second fixing member extending into the second shaft hole through the second radial hole and used to abut against the circumferential surface of the pivot shaft in the radial direction.

[0016] As can be seen from the technical solution, the embodiments provided by this utility model have the following advantages:

[0017] (1) The clamping channel on the upper surface of the support is used to clamp and fix the columnar product to be tested. By rotating the support, the inclination angle of the clamping channel can be changed, thereby changing the position of the product to be tested. The product to be tested can be detected from multiple angles or the diameter of the product to be tested at different positions can be obtained.

[0018] (2) The locking assembly is used to fix the relative position of the support and the base, ensuring stable position during testing, thereby improving testing accuracy;

[0019] (3) Multi-position measurement can be completed without removing the product from the support component, thus improving the testing efficiency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of the support component according to an embodiment of the present utility model from one perspective;

[0022] Figure 2 This is a schematic diagram of the overall structure of the support component according to an embodiment of the present utility model from another perspective;

[0023] Figure 3 This is a cross-sectional schematic diagram of the support component according to an embodiment of the present utility model;

[0024] Figure 4 This is a cross-sectional schematic diagram of the support component according to an embodiment of the present utility model;

[0025] Figure 5 This is a schematic diagram of the overall structure of the lock pin according to an embodiment of the present utility model;

[0026] Figure 6 This is a cross-sectional schematic diagram of the locking pin according to an embodiment of the present utility model.

[0027] Figure label:

[0028] Support component 100;

[0029] Base 1, upright plate 11, first shaft hole 111, connecting plate 12;

[0030] Support 2, upper surface 21, clamping channel 211, side wall 2111, lower surface 22, second shaft hole 23, first radial hole 24, second radial hole 25;

[0031] Pivot axis 3;

[0032] Locking assembly 4, lock hole 41, lock pin 42;

[0033] Adjust drive component 5;

[0034] First fastener 61, second fastener 62. Detailed Implementation

[0035] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0036] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] Cylindrical products such as pipes and bars are widely used in industrial production, and accurate dimensional measurement is a crucial aspect of quality control. While digital calipers and micrometers are commonly used for inspecting cylindrical products, laser measuring instruments are necessary for some high-precision or irregularly shaped cylindrical products. Ordinary measuring tools like digital calipers and micrometers are insufficient for these requirements.

[0039] In related technologies, when inspecting high-precision products or irregularly shaped cylindrical products, the product to be tested is installed in a clamping fixture and then inspected using a laser measuring instrument.

[0040] However, when testing different positions of the product to obtain its diameter at different locations, it is necessary to switch the product's orientation and reinstall it on the clamping fixture according to the specified orientation. This causes operational inconvenience and reduces testing efficiency.

[0041] Therefore, it is of great significance to design an adjustable support component that can be used with laser measuring instruments.

[0042] The following is for reference. Figures 1-6 Description of the support component 100 according to an embodiment of the present utility model.

[0043] Example 1

[0044] like Figure 1 and Figure 2 As shown, this embodiment provides a support component 100, which includes a base 1, a support member 2, and a locking component 4.

[0045] The support member 2 is mounted on the base 1 via a pivot shaft 3, and the support member 2 can rotate relative to the base 1 about the axis of the pivot shaft 3. The support member 2 has a clamping channel 211 that extends through the upper surface 21 of the support member, and the extending direction of the clamping channel 211 is located within the upper surface 21 of the support member 2. The axis of the pivot shaft 3 is parallel to the upper surface 21 of the support member 2, and the extending direction of the clamping channel 211 intersects the axis of the pivot shaft 3. A locking assembly 4 is disposed between the base 1 and the support member 2, and the locking assembly 4 is used to fix the support member 2.

[0046] The extension direction of the clamping channel 211 refers to the direction of the center line along the length of the clamping channel 211. This center line is parallel to the upper surface 21 of the support member, and the axis of the pivot shaft 3 is parallel to the upper surface 21 of the support member 2. That is to say, the extension direction of the clamping channel 211 and the axis of the pivot shaft 3 are both parallel to the upper surface 21 of the support member 2.

[0047] In a specific application scenario, the clamping channel 211 is used to clamp and fix the cylindrical product being inspected, and a laser detector (such as a laser diameter gauge) measures the diameter from an initial angle. After unlocking the locking assembly 4 and releasing the constraint of the support member 2, the support member 2 can rotate relative to the base 1 around the axis of the pivot 3, thereby changing the tilt angle of the clamping channel 211 on the upper surface 21 of the support member, so that the product being inspected is in different poses. Until the product being inspected is at the target angle, the relative position of the support member 2 and the base 1 is fixed by the locking assembly 4, and the laser detector obtains the diameter data under the new pose.

[0048] In other words, when the support 2 rotates, it causes the axis of the product being tested to tilt, and the laser measuring instrument can collect data from different angles.

[0049] As can be seen from the technical solution, the embodiments provided by this utility model have the following advantages:

[0050] (1) The clamping channel 211 on the upper surface 21 of the support is used to clamp and fix the columnar product to be tested. By rotating the support 2, the angle of the clamping channel 211 can be changed, thereby changing the position of the product to be tested. The product to be tested can be detected from multiple angles or the diameter of the product to be tested at different positions can be obtained.

[0051] (2) The locking assembly 4 is used to fix the support 2 to ensure stable position during testing;

[0052] (3) Multi-position measurement can be completed without disassembling the product being tested, thus improving testing efficiency.

[0053] like Figure 1 and Figure 2 As shown, the extension direction of the clamping channel 211 is perpendicular to the axis of the pivot axis 3. When the extension direction of the clamping channel 211 is perpendicular to the axis of the pivot axis 3, the two form an orthogonal coordinate system, where the pivot axis 3 is the rotation axis, and the extension direction of the clamping channel 211 is approximately parallel to the axial direction of the cylindrical product to be inspected. Thus, when the extension direction of the clamping channel 211 is perpendicular to the axis of the pivot axis 3, the angle between the product axis and the detection direction of the laser measuring instrument changes more uniformly, making it easier to establish the correspondence between "rotation angle - product pose - measurement data", which is especially suitable for high-precision inspection scenarios that require quantitative angle calibration.

[0054] like Figure 1 and Figure 2 As shown, there are multiple clamping channels 211, which are spaced apart along the axis of the pivot shaft 3. The multiple clamping channels 211 distributed along the axis of the pivot shaft 3 can simultaneously clamp multiple cylindrical products. When the support 2 rotates, the pose of all products changes synchronously. There is no need to disassemble and adjust each product individually; the pose switching of multiple products can be completed in a single operation, enabling batch testing and further improving testing efficiency.

[0055] like Figure 3As shown, each clamping channel 211 further includes a pair of opposing sidewalls 2111. The spacing between the sidewalls 2111 gradually decreases in the depth direction away from the upper surface 21 of the support member. The entrance width of the multiple clamping channels 211 increases sequentially along the axis of the pivot shaft 3, and the vertical depth of the multiple clamping channels 211 also increases sequentially along the axis of the pivot shaft 3. This means that in a clamping channel 211, the entrance width is greater than the internal width, forming a trumpet-shaped opening, which enables product self-centering. Even if there is a slight angular deviation when the product is inserted, it can be automatically corrected to the central axis along the sidewalls 2111, improving clamping efficiency. Here, the entrance width and vertical depth of the multiple clamping channels 211 increase sequentially along the axis of the pivot shaft 3, meaning the dimensions of the clamping channels 211 along the axis of the pivot shaft 3 are different. The support assembly 100 can adapt to products of different specifications and allow multiple products to be tested simultaneously, satisfying the clamping requirements of cylindrical products of different diameters while improving testing efficiency and versatility.

[0056] In a specific example, the clamping channel 211 has a V-shaped cross-section in the direction perpendicular to its extension.

[0057] Extending along the axis of pivot 3, the entrance width and vertical depth of each clamping channel 211 increase. For example:

[0058] The first clamping channel 211 has an inlet width of W1 and a depth of H1;

[0059] The entrance width of the second clamping channel 211 is W2>W1, and the depth is H2>H1;

[0060] The entrance width of the third clamping channel 211 is W3>W2, and the depth is H3>H2, and so on.

[0061] Example 2

[0062] like Figure 3 As shown, the base 1 further includes a first shaft hole 111, and a pivot shaft 3 is fixedly connected to the support member 2. At least one end of the pivot shaft 3 extends out of the support member 2 to rotatably connect to the first shaft hole 111. The locking assembly 4 includes a locking hole 41 and a locking pin 42. The locking hole 41 is formed on the base 1 and communicates with the first shaft hole 111. The locking pin 42 is threaded into the locking hole 41 and extends into the first shaft hole 111 through the locking hole 41. The end face of the extended end of the locking pin 42 radially abuts against the circumferential surface of the pivot shaft 3. The friction between the locking pin 42 and the circumferential surface of the pivot shaft 3 restricts the rotation of the pivot shaft 3, thereby fixing the support member 2. By fixing the support member 2 through the friction between the locking pin 42 and the circumferential surface of the pivot shaft 3, stepless angle locking can be achieved. The support member 2 can be locked at multiple angles, providing a stable support for the product being tested and improving the accuracy of the test.

[0063] In a specific example, the support 2 can be locked at angles of 0° and 15° with the horizontal plane.

[0064] like Figure 3 As shown, the base 1 is further provided with two first shaft holes 111, which are spaced apart along the axis of the pivot shaft 3. One end of the pivot shaft 3 extends out of the support member 2 and is rotatably connected to one of the first shaft holes 111, and the other end of the pivot shaft 3 extends out of the support member 2 and is rotatably connected to the other first shaft hole 111. By providing two first shaft holes 111 to support both ends of the pivot shaft 3, it is beneficial to improve the stability and reliability of the structure.

[0065] like Figure 3 As shown, in conjunction with the above embodiments, the locking components 4 can also be provided in two sets: one set of locking components 4 has a locking hole 41 connected to a first shaft hole 111, and the locking pin 42 of the locking components 4 can be radially abutted against the circumferential surface of one end of the pivot shaft 3 through the locking hole 41; the other set of locking components 4 has a locking hole 41 connected to another first shaft hole 111, and the locking pin 42 of the other set of locking components 4 can be radially abutted against the circumferential surface of the other end of the pivot shaft 3 through the locking hole 41.

[0066] like Figure 3 As shown, the support assembly 100 further includes an adjustment drive 5, which is connected to the pivot shaft 3 to drive the support 2 to pivot relative to the base 1.

[0067] Optionally, the adjustment drive 5 can be a drive motor, which is connected to the pivot shaft 3 to drive the pivot shaft 3 to rotate, thereby driving the support 2 to rotate relative to the base 1.

[0068] like Figure 3 As shown, optionally, the adjustment drive 5 can be a mechanical knob. The operator can rotate the mechanical knob, which is fixedly connected to the pivot shaft 3. By rotating the mechanical knob, the pivot shaft 3 can be rotated, thereby driving the support 2 to rotate relative to the base 1.

[0069] like Figure 3 As shown, in a specific example, one end of the pivot shaft 3 extends out of the base 1 and is connected to the adjustment drive 5.

[0070] like Figure 3As shown, the base 1 further includes two upright plates 11 and a connecting plate 12. Each upright plate 11 is arranged perpendicular to the axis, and the connecting plate 12 connects the two upright plates 11. A first shaft hole 111 is formed on one upright plate 11, and another first shaft hole 111 is formed on the other upright plate 11. The connecting plate 12 is located on the lower side of the support member 2. When the connecting plate 12 abuts against the lower surface 22 of the support member 2, the connecting plate 12 limits the downward rotation of the support member 2. This structure forms a mechanical limit for downward rotation by abutting the lower surface 22 of the support member 2 with the connecting plate 12, preventing the support member 2 from rotating excessively and causing the tested product to fall or lose its posture control. At the same time, it provides a stable support base for the support member 2, ensuring that the angle range during rotation adjustment is controllable, improving operational safety and structural stability, and ensuring the reliability of posture adjustment during the testing process.

[0071] In a specific example, the angle between the support 2 and the horizontal plane is θ, -15°≤θ≤15°. When the angle between the support 2 and the horizontal plane is 0°, the upper surface 21 of the support 2 is parallel to the horizontal plane.

[0072] Example 3

[0073] like Figure 3 As shown, the support member 2 further includes a second shaft hole 23 and a first radial hole 24. The second shaft hole 23 can accommodate the pivot shaft 3, and the first radial hole 24 communicates with the second shaft hole 23. The support assembly 100 also includes a first fixing member 61, which extends into the second shaft hole 23 through the first radial hole 24. The first fixing member 61 can radially abut against the circumferential surface of the pivot shaft 3, and the support member 2 and the pivot shaft 3 are fixed by the friction between the first fixing member 61 and the circumferential surface of the pivot shaft 3. This design uses the first fixing member 61 to radially abut against the pivot shaft 3, and uses friction to lock the relative position of the support member 2 and the pivot shaft 3, preventing them from loosening or slipping, and ensuring stable posture after angle adjustment. After the first fixing member 61 is removed from the second shaft hole 23 and the first radial hole 24, the support member 2 can be quickly replaced. The clamping channel 211 can be switched to adapt to the specifications of the product being tested (such as diameter and cross-sectional shape), and the layout structure is compact and can be flexibly disassembled and assembled.

[0074] like Figure 4As shown, the support member 2 is further provided with a second radial hole 25, which communicates with the second shaft hole 23. The circumferential angle of the second radial hole 25 is different from that of the first radial hole 24. The support assembly 100 also includes a second fixing member 62, which extends into the second shaft hole 23 through the second radial hole 25 and is used to radially abut against the circumferential surface of the pivot shaft 3. By configuring two fixing members with two radial holes of different circumferential angles, bidirectional radial pressure can be formed on the pivot shaft 3 from different directions, enhancing the fixing reliability of the support member 2 and the pivot shaft 3 and eliminating the rotational clearance that may be caused by unidirectional fixing. The synergistic effect of multi-directional frictional forces ensures that there is no loosening after angle adjustment, thus improving structural stability.

[0075] The difference in circumferential angles here refers to a difference in the angular coordinates of the positions of the two radial holes (such as the first and second radial holes) along the circumferential direction centered on the pivot shaft (not collinear at 0° or 180°). For example, if the first radial hole is opened vertically (90°), the second radial hole can be opened horizontally (0°) or at other angles such as 45° or 135°, so that the two holes are distributed non-coincidentally and non-oppositely on the circumference. This design uses multi-directional fasteners to abut against the pivot shaft, forming a three-dimensional frictional constraint, avoiding the risk of loosening due to unidirectional fastening, and improving the connection stability between the support and the pivot shaft.

[0076] In a specific example, the second shaft hole 23 passes through the support member 2 in the left-right direction; one end of the first radial hole 24 is connected to the second shaft hole 23, and the other end of the first radial hole 24 passes through the upper surface 21 of the support member 2; one end of the second radial hole 25 is connected to the second shaft hole 23, and the other end of the second radial hole 25 passes through the front or rear surface of the support member 2.

[0077] like Figure 5 and Figure 6 As shown, in a specific example, the first fixing member 61, the second fixing member 62, and the locking pin 42 can all be threaded pins, and the first radial hole 24, the second radial hole 25, and the locking hole 41 can all be threaded holes. The dimensions and friction coefficients of the contact surfaces of the first fixing member 61, the second fixing member 62, and the locking pin 42 are different, and the dimensions of the first radial hole 24, the second radial hole 25, and the locking hole 41 are respectively adapted to the dimensions of the first fixing member 61, the second fixing member 62, and the locking pin 42.

[0078] Other configurations and operations of the support component 100 according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here. In the description of the present invention, "first feature" and "second feature" may include one or more of the features. The vertical, horizontal, and front-back directions are defined as shown in the figures.

[0079] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features not in direct contact but through another feature between them. Moreover, "above," "over," and "on top" of the second feature include the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature.

[0080] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0081] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A support assembly comprising: include: Base (1); The support (2) is mounted on the base (1) via a pivot (3) and has a clamping channel (211) that extends through the upper surface (21) of the support. The extension direction of the clamping channel (211) is located within the upper surface (21), and the axis of the pivot (3) is parallel to the upper surface (21) and intersects with the extension direction of the clamping channel (211). A locking assembly (4) is disposed between the base (1) and the support member (2) for fixing the support member (2).

2. The bolster assembly of claim 1, wherein, The clamping channel (211) extends perpendicularly to the axis of the pivot (3).

3. The bolster assembly of claim 2, wherein, The clamping channel (211) includes a plurality of channels spaced apart along the axial direction of the pivot axis (3).

4. The bolster assembly of claim 3, wherein, Each of the clamping channels (211) includes a pair of opposing sidewalls (2111), the spacing of which gradually decreases in the depth direction away from the upper surface (21) of the support; The entrance width and vertical depth of the plurality of clamping channels (211) increase sequentially along the axial direction of the pivot axis (3).

5. The bolster assembly of claim 1, wherein, The base (1) is provided with a first shaft hole (111), and the pivot shaft (3) is fixed to the support (2) and at least one end extends out of the support (2) to be rotatably connected to the first shaft hole (111). The locking assembly (4) includes a lock hole (41) and a lock pin (42). The lock hole (41) is opened on the base (1) and communicates with the first shaft hole (111). The locking pin (42) is threaded to the locking hole (41), extends into the first shaft hole (111) and radially abuts against the circumferential surface of the pivot shaft (3) to limit the rotation of the pivot shaft (3).

6. The bolster assembly of claim 5, wherein, The base (1) is provided with two first shaft holes (111) spaced apart along the axis of the pivot shaft (3), and the support member (2) extends from both ends of the pivot shaft (3) and is rotatably connected to the two first shaft holes (111).

7. The support component according to claim 6, characterized in that, It also includes the adjustment drive (5); The adjustment drive (5) is connected to the pivot shaft (3) to drive the support (2) to pivot relative to the base (1).

8. The support component according to claim 6, characterized in that, The base (1) includes two vertical plates (11) perpendicular to the axis and a connecting plate (12) connecting the two vertical plates (11). Two first shaft holes (111) are respectively opened on the two upright plates (11), and the connecting plate (12) is located on the lower side of the support (2) and is configured to limit the downward rotation of the support (2) when it abuts against the lower surface (22) of the support (2).

9. The bolster assembly of claim 5, wherein, The support member (2) is provided with a second shaft hole (23) for mounting the pivot shaft (3) and a first radial hole (24) communicating with the second shaft hole (23). The support assembly further includes a first fastener (61) which extends into the second shaft hole (23) through the first radial hole (24) and is used to secure the support (2) to the pivot shaft (3) when it radially abuts against the circumferential surface of the pivot shaft (3).

10. The bolster assembly of claim 9, wherein, The support member (2) is also provided with a second radial hole (25) communicating with the second shaft hole (23), and the second radial hole (25) has a different circumferential angle from the first radial hole (24); The support assembly also includes a second fastener (62) that extends into the second shaft hole (23) through the second radial hole (25) and is used to abut against the circumferential surface of the pivot shaft (3) in the radial direction.

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