Knuckle assembly tool

Abstract

The embodiment of the utility model relates to the technical field of assembly tools, and discloses a steering knuckle assembly tool. The steering knuckle assembly tool is used for assembling a steering knuckle and an upper fork arm, the upper fork arm is connected with a vehicle body, a universal ball head is arranged on the upper fork arm, the steering knuckle is arranged on one side of a brake in the axial direction, the steering knuckle assembly tool comprises a pressing rod and a pressure maintaining device, and one end of the pressing rod in the length direction is suitable for being erected below the upper fork arm; the pressing rod is arranged on the upper end face of the universal ball head in a pressing mode and used for pressing the universal ball head into the steering knuckle, and the universal ball head is separated from the two ends of the pressing rod in the length direction. The pressure maintaining device is connected with the pressing rod and used for fixing the pressing rod after the universal ball head is assembled into the steering knuckle. According to the steering knuckle assembly tool, by arranging the pressure maintaining device, after the pressing rod presses the universal ball head to be assembled into the steering knuckle, the pressure maintaining device can fix the pressing rod, the purpose of labor saving in assembly can be achieved, meanwhile, the final assembly quality is improved, and damage to an installation bolt is avoided.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the technical field of assembly tooling, in particular to a knuckle assembly tooling. BACKGROUND

[0002] In the prior art, when the universal ball head on the upper fork arm is connected with the knuckle during the process of vehicle chassis and body assembly, a large pressing force is required, and the assembly is difficult; meanwhile, after the universal ball head is assembled into the knuckle, the mounting bolt extends into the knuckle and is clamped in the limiting groove of the universal ball head, and in the process of mounting the mounting bolt, the universal ball head may be pulled out of the knuckle, which may cause the mounting bolt to be unable to pass through the limiting groove or the mounting bolt to be tightened and the problem of tooth slipping to occur. CONTENT OF THE UTILITY MODEL

[0003] In view of this, the embodiment of the present application provides a knuckle assembly tooling, which can achieve the purpose of labor-saving assembly, improve the final assembly quality, and avoid damage to the mounting bolt.

[0004] In order to achieve the above purpose, the technical scheme of the embodiment of the present application is as follows:

[0005] In a first aspect, the embodiment of the present application provides a knuckle assembly tooling for assembling a knuckle and an upper fork arm, the upper fork arm is connected with a vehicle body, the upper fork arm is provided with a universal ball head, the knuckle is arranged on one side of the axial direction of a brake, and the knuckle assembly tooling comprises a pressing rod and a pressure maintaining device, one end of the length direction of the pressing rod is adapted to be arranged below the upper fork arm, the pressing rod is arranged on the upper end surface of the universal ball head, and is used for pressing the universal ball head into the knuckle, and the universal ball head is spaced apart from both ends of the length direction of the pressing rod; the pressure maintaining device is connected with the pressing rod, and is used for fixing the pressing rod after the universal ball head is assembled into the knuckle.

[0006] According to the knuckle assembly tooling of the embodiment of the present application, by arranging the pressure maintaining device, the pressure maintaining device is connected with the pressing rod, the pressure maintaining device can fix the pressing rod after the pressing rod presses the universal ball head to be assembled into the knuckle, the pressing rod can fix the universal ball head, the universal ball head is prevented from being pulled out of the knuckle during the process of mounting the mounting bolt, and the problems of the mounting bolt being unable to pass through the limiting groove of the universal ball head or the mounting bolt being tightened and tooth slipping are prevented. The purpose of labor-saving assembly can be achieved, the final assembly quality is improved, and damage to the mounting bolt is avoided.

[0007] In a possible implementation manner of the present application, the knuckle assembly tooling further comprises a brake operating tool, the brake operating tool is arranged on the side of the axial direction of the brake away from the knuckle, and is used for driving the brake to move.

[0008] In a possible implementation of the present application, the brake operating tool comprises a mounting disc and a fixed leg, the mounting disc is fixedly connected with the hub of the brake; one end of the fixed leg in the length direction is fixedly connected with the mounting disc, and the other end is abutted against the brake caliper.

[0009] In a possible implementation of the present application, the mounting disc is connected with the hub through a fastener.

[0010] In a possible implementation of the present application, the fixed leg is a plurality of fixed legs, the plurality of fixed legs are arranged in the circumferential direction of the mounting disc, the fixed leg extends in the radial direction of the mounting disc, the radially inner end of the fixed leg is connected with the mounting disc, and the radially outer end is abutted against the brake caliper.

[0011] In a possible implementation of the present application, the brake operating tool further comprises an operating rod, the operating rod comprises a first segment and a second segment, the first segment is connected with the mounting disc and extends in the radial direction of the hub, one end of the second segment in the length direction is connected with the radially outer end of the first segment and is away from the steering knuckle in the axial direction of the mounting disc, and the second segment is inclined towards the radially outward direction of the mounting disc.

[0012] In a possible implementation of the present application, the pressure maintaining device is fixedly arranged on the mounting disc.

[0013] In a possible implementation of the present application, the pressure maintaining device comprises a quick clamp and a fixed base, one end of the quick clamp in the length direction is connected with the pressing rod; the fixed base is fixedly arranged on the mounting disc, and at least part of the quick clamp is arranged on the fixed base.

[0014] In a possible implementation of the present application, the pressing rod comprises a rod body and a limiting piece, the rod body is arranged on the upper end surface of the universal ball head; the limiting piece comprises a connecting part and two extending arms, the connecting part extends in the front-back direction, the middle position of the connecting part is fixedly connected with one end of the rod body in the length direction, two ends of the extending arms in the length direction are fixedly connected with two ends of the connecting part in the length direction respectively, and the other ends are arranged below the upper cross arm.

[0015] In a possible implementation of the present application, along the length direction of the pressing rod, the distance between the position where the pressing rod is arranged on the upper end surface of the universal ball head and the end of the pressing rod arranged below the upper cross arm in the length direction is L1, the distance between the position where the pressing rod is arranged on the upper end surface of the universal ball head and the end of the pressing rod away from the upper cross arm in the length direction is L2, and L1 < L2 is satisfied. Attached Figure Description

[0016] Figure 1 A partial schematic diagram of the steering knuckle assembly fixture, steering knuckle, upper wishbone, and brake provided in an embodiment of this application;

[0017] Figure 2 A partial schematic diagram from another angle of the steering knuckle assembly tooling, steering knuckle, upper wishbone, and brake provided in an embodiment of this application;

[0018] Figure 3 A front view of the steering knuckle assembly fixture provided in an embodiment of this application;

[0019] Figure 4 A left view of the steering knuckle assembly fixture provided in an embodiment of this application;

[0020] Figure 5 A top view of the steering knuckle assembly fixture provided in an embodiment of this application;

[0021] Figure 6 A perspective view of the steering knuckle assembly fixture provided in an embodiment of this application.

[0022] Figure label:

[0023] 100. Steering knuckle assembly fixture;

[0024] 1. Pressure bar; 11. Bar body; 12. Limiting component; 121. Connecting part; 122. Extending arm;

[0025] 2. Pressure holding device; 21. Quick clamp; 211. Handle; 22. Fixed base;

[0026] 3. Brake operating tools; 31. Mounting plate; 311. Oblong hole; 32. Fixed support foot; 33. Operating lever; 331. First section; 332. Second section;

[0027] 200. Steering knuckle; 300. Upper wishbone; 301. Universal joint; 400. Brake; 401. Brake disc; 402. Brake caliper; 403. Wheel hub. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the specific technical solutions of this application will be further described in detail below with reference to the accompanying drawings of the embodiments of this application. The following embodiments are used to illustrate this application, but are not intended to limit the scope of this application.

[0029] In the embodiments of the present application, the terms "first", "second" are used only for descriptive purposes, and cannot be construed as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0030] In addition, in the embodiments of the present application, the orientation terms such as "upper", "lower", "left" and "right" are defined with respect to the orientation of the components shown in the drawings, and it should be understood that these directional terms are relative concepts, which are used for relative description and clarification, and can be changed accordingly according to the change of the orientation of the components placed in the drawings.

[0031] In the embodiments of the present application, unless otherwise explicitly specified and limited, the term "connection" should be understood in a broad sense, for example, "connection" can be fixed connection, or detachable connection, or integral; can be directly connected, or indirectly connected through intermediate medium.

[0032] In the embodiments of the present application, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or apparatus including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or apparatus. Without more limitations, the element defined by the sentence "including a…" does not exclude the presence of other identical elements in the process, method, article or apparatus including the element.

[0033] In the embodiments of the present application, the words "exemplary" or "for example" are used to mean serving as an example, instance or illustration. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present application should not be construed as being more preferred or advantageous than other embodiments or design solutions. Rather, the use of the words "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0034] This application provides a steering knuckle assembly fixture 100 for assembling a steering knuckle 200 and an upper wishbone 300. Both the steering knuckle 200 and the upper wishbone 300 are used on vehicles. It should be noted that the vehicle in this application can refer to large vehicles, small vehicles, special-purpose vehicles, etc. For example, according to vehicle type, the vehicle in this application can be a sedan, an off-road vehicle, a multi-purpose vehicle (MPV), or other types of vehicles. Vehicles generally have wheels, a power source, and a transmission system between the wheels and the power source. The transmission system can transmit the power provided by the power source to the wheels, causing the wheels to rotate and thus driving the vehicle.

[0035] It should be noted that, in this embodiment of the application, the material of each part of the steering knuckle assembly fixture 100 is not limited. For example, in order to reduce the weight of the steering knuckle assembly fixture 100, some parts can be made of plastic; in order to ensure the strength of the steering knuckle assembly fixture 100, some parts can be made of metal.

[0036] The steering knuckle assembly fixture 100 provided in this embodiment is used to assemble the steering knuckle 200 and the upper wishbone 300. The upper wishbone 300 is connected to the vehicle body and is provided with a universal ball joint 301. The steering knuckle 200 is located in the axial direction of the brake 400 (e.g., ...). Figure 2 On one side of the first direction shown, the steering knuckle assembly fixture 100 can facilitate the assembly of the steering knuckle 200 and the upper wishbone 300, making the assembly operation of the steering knuckle 200 and the upper wishbone 300 more convenient.

[0037] For example, for some steering knuckle assembly fixtures 100, the upper fork 300 is first connected to the vehicle body and then assembled with the steering knuckle 200.

[0038] Based on this, refer to Figure 1 This application embodiment also provides a steering knuckle assembly fixture 100, including a pressure rod 1 and a pressure holding device 2.

[0039] To better illustrate the steering knuckle assembly fixture 100 provided in the embodiments of this application, refer to... Figure 1 and Figure 2 The length direction of the pressure rod 1 (e.g.) Figure 2The end of the second direction shown) is adapted to be arranged below the upper fork arm 300, the pressing rod 1 can rotate around the position where the upper fork arm 300 is connected to the vehicle body, the pressing rod 1 is arranged on the upper end surface of the universal ball head 301, and is used to press the universal ball head 301 into the knuckle 200. The universal ball head 301 is spaced apart from the two ends of the length direction of the pressing rod 1. It can be understood that the end of the length direction of the pressing rod 1 is arranged below the upper fork arm 300, and the other end is used to operate the pressing rod 1. When the user presses down the pressing rod 1, the part of the pressing rod 1 arranged on the upper end surface of the universal ball head 301 presses the universal ball head 301 into the knuckle 200, and the operation of pressing the universal ball head 301 into the knuckle 200 is more convenient.

[0040] The universal ball head 301 is provided with a limiting groove, the limiting groove is arranged on the outer surface of the universal ball head 301 and extends along the circumferential direction of the universal ball head 301. After the universal ball head 301 is assembled into the knuckle 200, the mounting bolt extends into the knuckle 200 and is clamped in the limiting groove.

[0041] Referring to Figure 1 and Figure 2 , the pressure maintaining device 2 is connected with the pressing rod 1, and is used to fix the pressing rod 1 after the universal ball head 301 is assembled into the knuckle 200. After the universal ball head 301 is assembled into the knuckle 200, the pressure maintaining device 2 can fix the pressing rod 1, the pressing rod 1 can fix the universal ball head 301, so that the universal ball head 301 cannot be pulled out from the knuckle 200 during the installation process of the mounting bolt, and problems such as the mounting bolt being unable to pass through the limiting groove on the universal ball head 301 or the mounting bolt being unable to be tightened are avoided. The purpose of labor-saving assembly can be achieved, the final assembly quality is improved, and the mounting bolt is prevented from being damaged.

[0042] According to the knuckle assembly tool 100 provided by the embodiment of the present application, the pressure maintaining device 2 is arranged, the pressure maintaining device 2 is connected with the pressing rod 1, and the pressure maintaining device 2 can fix the pressing rod 1 after the pressing rod 1 presses the universal ball head 301 to be assembled into the knuckle 200. The pressing rod 1 can fix the universal ball head 301, so that the universal ball head 301 cannot be pulled out from the knuckle 200 during the installation process of the mounting bolt, and problems such as the mounting bolt being unable to pass through the limiting groove on the universal ball head 301 or the mounting bolt being unable to be tightened are avoided. The purpose of labor-saving assembly can be achieved, the final assembly quality is improved, and the mounting bolt is prevented from being damaged.

[0043] In addition, in the embodiment of the present application, the contact position of the pressing rod 1 and the universal ball head 301 is not limited, as long as the universal ball head 301 can be pressed down. For example, the position of the pressing rod 1 in contact with the universal ball head 301 can be provided with a pressing part, and the area of the pressing part is large, so that the pressing part can press the universal ball head 301 into the knuckle 200.

[0044] In some embodiments of the present application, referring toFigure 1 And Figure 2 The knuckle assembly tool 100 further comprises a brake operating tool 3 arranged on the side of the brake 400 axially away from the knuckle 200, for driving the brake 400 to move. It can be understood that when the pressing rod 1 presses the universal ball head 301, the universal ball head 301 rotates about the connection position of the upper fork arm 300 and the vehicle body, and the universal ball head 301 has a gap of only 0.1 mm with the knuckle 200. When the universal ball head 301 is pressed into the knuckle 200 along an arc-shaped movement track, there may be some interference between the universal ball head 301 and the knuckle 200. By arranging the brake operating tool 3, the position of the brake 400 can be slightly adjusted when the universal ball head 301 is pressed into the knuckle 200 along the arc-shaped movement track, so as to slightly adjust the position of the knuckle 200, so that the knuckle 200 can avoid interference with the universal ball head 301 as much as possible when the universal ball head 301 is assembled into the knuckle 200, thereby increasing the reliability of the process of assembling the universal ball head 301 into the knuckle 200.

[0045] Further, referring to Figure 1 And Figure 4 In some embodiments of the present application, the brake operating tool 3 comprises a mounting disc 31 and a fixed leg 32. The mounting disc 31 is fixedly connected to the hub 403 of the brake 400, so that the brake operating tool 3 can be mounted on the hub 403 and limited in the thickness direction of the hub 403. One end of the fixed leg 32 is fixedly connected to the mounting disc 31, and the other end is abutted against the brake caliper 402 of the brake 400. The brake caliper 402 is arranged on one side of the hub 403 in the circumferential direction and is rotatable relative to the hub 403. By arranging the fixed leg 32, the rotation of the hub 403 that may occur can be limited, and the rotation of the brake disc 401 and the knuckle 200 is limited, thereby facilitating the assembly of the knuckle 200 and the upper fork arm 300.

[0046] On this basis, referring to Figure 1 In some embodiments of the present application, the mounting disc 31 and the hub 403 are connected by a fastener. The assembly of the mounting disc 31 and the hub 403 is simple and reliable.

[0047] It should be noted that in the embodiments of the present application, the specific form of the fastener is not limited, and can be set according to the assembly requirements of the mounting disc 31 and the hub 403. For example, in some embodiments of the present application, the fastener can be a screw, a stud, a fixed pin, etc.

[0048] In addition, in some embodiments of the present application, referring to Figure 1 And Figure 4The through hole for the fastener to pass through on the mounting disc 31 can be a waist-shaped hole 311 extending along the circumferential direction of the mounting disc 31, and the mounting disc 31 can be adapted to various mounting positions, facilitating the mounting of the brake operating tool 3.

[0049] In some embodiments of the present application, referring to Figure 1 and Figure 4 , the fixing legs 32 are a plurality of fixing legs 32 arranged at intervals along the circumferential direction of the mounting disc 31, and can abut the brake caliper 402 at multiple positions in the circumferential direction of the mounting disc 31, increasing the reliability of the mounting position of the brake operating tool 3. The fixing leg 32 extends along the radial direction of the held mounting disc 31, and the radial inner end of the fixing leg 32 is connected to the mounting disc 31, and the radial outer end abuts the brake caliper 402, and the connection of the fixing leg 32 to the mounting disc 31 and the abutment to the brake caliper 402 are relatively simple and reliable.

[0050] In some embodiments of the present application, referring to Figure 5 and Figure 6 , the brake operating tool 3 further comprises an operating rod 33, the operating rod 33 comprising a first section 331 and a second section 332, the first section 331 being connected to the mounting disc 31 and extending along the radial direction of the hub 403, and one end of the second section 332 in the length direction being connected to the radial outer end of the first section 331, the second section 332 being inclined towards the radial direction of the mounting disc 31 away from the steering knuckle 200. The user can displace the brake operating tool 3 by moving the operating rod 33, thereby moving the brake 400, and further moving the steering knuckle 200, so that the universal ball head 301 can be fitted into the steering knuckle 200 as much as possible to avoid interference between the universal ball head 301 and the steering knuckle 200, increasing the reliability of the process of fitting the universal ball head 301 into the steering knuckle 200.

[0051] In addition, the second section 332 is inclined towards the radial direction of the mounting disc 31, which can avoid the hands of the user from rubbing against the hub 403 when using the operating rod 33, and avoid injury to the hands or other parts of the user.

[0052] In some embodiments of the present application, referring to Figure 3 and Figure 6 , the pressure maintaining device 2 is fixedly arranged on the mounting disc 31, and the pressure maintaining device 2 can be mounted on the hub 403 together with the mounting disc 31, and only the pressure rod 1 and the mounting disc 31 need to be assembled when the steering knuckle assembly tool 100 is used, which can simplify the use and operation of the steering knuckle assembly tool 100, and the position of the pressure maintaining device 2 is relatively reliable.

[0053] In some embodiments of the present application, referring to Figure 2 and Figure 3The pressure holding device 2 includes a quick clamp 21 and a fixed base 22, wherein the length direction of the quick clamp 21 is (e.g., ...) Figure 2 One end of the third direction shown is connected to the pressure rod 1 to facilitate the limiting of the pressure rod 1; the fixed base 22 is fixed on the mounting plate 31, and at least part of the quick clamp 21 is located on the fixed base 22, so that the position of the quick clamp 21 is relatively fixed and reliable.

[0054] Therefore, when assembling the upper fork 300 and the steering knuckle 200, the upper fork 300 is first connected to the vehicle body, and the steering knuckle 200 is located on one side of the brake 400 in the axial direction and is fixedly connected to the brake 400 and moves synchronously. First, install the pressure rod 1 onto the upper fork arm 300, with one end of the pressure rod 1 positioned below the upper fork arm 300. Then, fix the brake operating tool 3 onto the wheel hub 403, thus achieving a fixed connection between the brake operating tool 3 and the pressure holding device 2 and the wheel hub 403. Next, operate the pressure rod 1 to press the upper fork arm 300 downwards, while simultaneously operating the brake operating tool 3 to finely adjust the angle of the steering knuckle 200, pressing the universal joint 301 of the upper fork arm 300 into the steering knuckle 200. Next, rotate the handle 211 of the quick clamp 21 of the pressure holding device 2 downwards to lock the pressure rod 1 and the brake operating tool 3, preventing the universal joint 301 from dislodging from the steering knuckle 200. Then, insert the mounting bolt into the steering knuckle 200 and lock it into the limiting groove of the universal joint 301, and tighten the mounting bolt. Finally, loosen the steering knuckle assembly fixture 100 to complete the assembly of the steering knuckle 200 and the upper fork arm 300.

[0055] In some embodiments of this application, reference is made to Figure 1 and Figure 3 The pressure bar 1 includes a bar body 11 and a limiting member 12. The bar body 11 is pressed against the upper end surface of the universal ball joint 301. The limiting member 12 includes a connecting part 121 and two extending arms 122. The connecting part 121 extends in the front-rear direction and its middle position is fixedly connected to one end of the bar body 11 in the length direction. One end of the two extending arms 122 in the length direction is fixedly connected to both ends of the connecting part 121 in the length direction, and the other end rests on the lower part of the upper fork arm 300. At this time, the end of the pressure bar 1 near the upper fork arm 300 forms a near-U-shaped structure. The two extending arms 122 overlap with the lower part of the upper fork arm 300, which can effectively limit the pressure bar 1, making the relative position of the pressure bar 1 and the upper fork arm 300 relatively fixed, which facilitates pressing down the universal ball joint 301 of the upper fork arm 300 by the pressure bar 1.

[0056] In some embodiments of this application, reference is made to Figure 2 and Figure 3, the distance between the position where the pressing rod 1 is pressed on the upper end surface of the universal ball head 301 and the one end of the pressing rod 1 which is arranged below the upper cross arm 300 in the length direction of the pressing rod 1 is L1, and the distance between the position where the pressing rod 1 is pressed on the upper end surface of the universal ball head 301 and the one end of the pressing rod 1 which is away from the upper cross arm 300 in the length direction of the pressing rod 1 is L2, and L1 < L2 is satisfied. It can be understood that the pressure required for pressing the upper cross arm 300 is large (for example, 34 kg), at this time, the distance between the position where the pressing rod 1 is pressed on the upper end surface of the universal ball head 301 and the one end of the pressing rod 1 which is away from the upper cross arm 300 in the length direction of the pressing rod 1 is greater than the distance between the position where the pressing rod 1 is pressed on the upper end surface of the universal ball head 301 and the one end of the pressing rod 1 which is arranged below the upper cross arm 300 in the length direction of the pressing rod 1, which is similar to a force-saving lever, and the user is more labor-saving in the process of operating the pressing rod 1 to press down the universal ball head 301.

[0057] In the present application, the total length of the pressing rod 1 is 350 mm.

[0058] The above-mentioned sequence numbers of the embodiments of the present application are only for description, and do not represent the advantages and disadvantages of the embodiments. The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A knuckle assembling tool for assembling a knuckle (200) and an upper arm (300), the upper arm (300) being connected to a vehicle body, the upper arm (300) being provided with a universal ball head (301), the knuckle (200) being provided on one side in the axial direction of a brake (400), characterized in that the knuckle (200) assembling tool (100) comprising: a pressing rod (1), one end of the length direction of the pressing rod (1) being adapted to be arranged below the upper arm (300), the pressing rod (1) being pressed on the upper end surface of the universal ball head (301) for pressing the universal ball head (301) into the knuckle (200), the universal ball head (301) being spaced apart from both ends of the length direction of the pressing rod (1); a pressure maintaining device (2) connected with the pressing rod (1) for fixing the pressing rod (1) after the universal ball head (301) is assembled into the knuckle (200).

2. The knuckle assembly tool of claim 1, wherein, Further comprising: a brake operating tool (3) provided on the side of the brake (400) in the axial direction away from the knuckle (200) for driving the brake (400) to move.

3. The knuckle assembly tool of claim 2, wherein, the brake operating tool (3) comprising: a mounting disc (31) fixedly connected with the hub (403) of the brake (400); a fixed leg (32), one end of the length direction of the fixed leg (32) being fixedly connected with the mounting disc (31), and the other end being abutted with the brake caliper (402) of the brake (400).

4. The knuckle assembly tool of claim 3, wherein, The mounting disc (31) and the hub (403) are connected by fasteners.

5. The knuckle assembly tool of claim 3, wherein, The fixed leg (32) is a plurality of fixed legs (32) arranged in the circumferential direction of the mounting disc (31), the fixed leg (32) extends in the radial direction of the mounting disc (31), the radially inner end of the fixed leg (32) is connected with the mounting disc (31), and the radially outer end is abutted with the brake caliper (402).

6. The knuckle assembly tool of claim 3, wherein, The brake operating tool (3) further comprises: an operating rod (33) comprising a first section (331) and a second section (332), the first section (331) being connected with the mounting disc (31) and extending in the radial direction of the hub (403), one end of the length direction of the second section (332) being connected with the radially outer end of the first section (331) and extending in the direction of the mounting disc (31) away from the knuckle (200), the second section (332) being inclined towards the radially outward direction of the mounting disc (31).

7. The knuckle assembly tool of claim 3, wherein, The pressure maintaining device (2) is fixedly arranged on the mounting disc (31).

8. The knuckle assembly tool of claim 3, wherein, The pressure maintaining device (2) comprises: a quick clamp (21), one end of the length direction of the quick clamp (21) being connected with the pressing rod (1); a fixed base (22) fixedly arranged on the mounting disc (31), at least part of the quick clamp (21) being arranged on the fixed base (22).

9. The knuckle assembly tool of claim 1, wherein, The pressing rod (1) comprises: a rod body (11) which is pressed on the upper end surface of the universal ball head (301); a limiting piece (12) which comprises a connecting part (121) and two extending arms (122), the connecting part (121) extends in the front-rear direction, the middle position of the connecting part (121) is fixedly connected with one end of the length direction of the rod body (11), the two ends of the length direction of the connecting part (121) are respectively fixedly connected with the two ends of the length direction of the two extending arms (122), and the other ends of the two extending arms (122) are arranged below the upper cross arm (300).

10. The knuckle assembly tool of claim 1, wherein, In the length direction of the pressing rod (1), the distance between the position where the pressing rod (1) is pressed on the upper end surface of the universal ball head (301) and the one end of the length direction of the pressing rod (1) which is arranged below the upper cross arm (300) is L1, the distance between the position where the pressing rod (1) is pressed on the upper end surface of the universal ball head (301) and the one end of the length direction of the pressing rod (1) which is away from the upper cross arm (300) is L2, and L1 < L2 is satisfied.

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