Automobile control arm and its testing fixture and control arm testing method

Abstract

The application discloses a kind of automobile control arm and its testing tool and control arm detection method, including control arm body and a pair of connecting sleeve, control arm body includes adjustable length section, it includes fixed rod, telescopic rod and limiting unit;Angle adjustable section is mutually fixed with fixed rod by adjusting unit, a pair of connecting sleeve is respectively fixed in the outer end of telescopic rod and angle adjustable section, in daily use, by using the above technical solution, the angle between angle adjustable section and adjustable length section is adjusted by adjusting unit, the length of adjustable length section is adjusted by telescopic rod and limiting unit, so that each connecting sleeve can adjust spacing according to the installation point position of different vehicle chassis, improve the application range of the automobile control arm.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of automobile control arm and its testing tool and control arm detection method. BACKGROUND

[0002] Automobile control arm is used for the connection between wheel support and front subframe, to transfer the load of steering knuckle and subframe, so that wheel has a certain rollover bounce space relative to vehicle body, and can be reliably connected with subframe, so automobile control arm needs good stiffness and strength.

[0003] For example, the lever type automobile control arm of the Chinese utility model patent with publication No.CN213501689U, it includes sealing ring, lifting ring, device main body, connecting sleeve, reinforcing strip, fixed sleeve, ball, rotating sleeve, support plate, cross bar, telescopic rod, limit block, air pressure bin, sliding shaft and ball head, by the setting of connecting sleeve, reinforcing strip and telescopic rod, it is convenient to maintain automobile control arm, improve strength and avoid damage due to excessive stroke, but the defects of this technical scheme are:

[0004] The length and curvature of the automobile control arm are not adjustable, only one car can be matched, if forcibly assembled to the chassis of different models, due to the difference of vehicle chassis of each vehicle, collision interference phenomenon may occur, the company has developed a kind of automobile control arm with adjustable curvature and length. SUMMARY

[0005] The present application aims to solve one of the technical problems existing in the prior art.

[0006] The present application provides an automobile control arm, comprising a control arm body and a pair of connecting sleeves, characterized in that the control arm body comprises:

[0007] A length adjustable section, comprising a fixed rod, a telescopic rod and a limiting unit;

[0008] An angle adjustable section, which is fixedly connected with the fixed rod through an adjusting unit;

[0009] Wherein, the pair of connecting sleeves are respectively fixedly connected to the outer end of the telescopic rod and the angle adjustable section.

[0010] The length adjustable section further comprises:

[0011] A mounting groove, which is provided on the outer end of the wall of the fixed rod, for inserting the telescopic rod;

[0012] A plurality of insertion slots, which are symmetrically and intervaliy arranged on the opposite side walls of the telescopic rod;

[0013] A plurality of insertion blocks, which are symmetrically and intervaliy arranged on the opposite inner walls of the mounting groove, and can be inserted and matched with the corresponding insertion slots.

[0014] The limiting unit comprises:

[0015] screwed on the outer wall of the fixed rod;

[0016] a collar fixed on the telescopic rod, with a cross-sectional diameter larger than that of the fixed rod;

[0017] a locking bolt screwed on the threaded sleeve through a threaded hole.

[0018] The limiting unit further comprises:

[0019] a slot provided on the telescopic rod away from the connecting sleeve end;

[0020] wherein the lower end of the locking bolt can be inserted into the slot.

[0021] The adjusting unit comprises:

[0022] a connecting slot provided on the fixed rod away from the telescopic rod end;

[0023] a through hole extending through the connecting end of the fixed rod and the angle adjusting segment;

[0024] a plurality of limiting grooves circumferentially spaced apart on the inner circumferential wall of the through hole;

[0025] a plug rod which can be inserted into the through hole and has limiting protrusions on the peripheral wall for plugging into the limiting grooves.

[0026] The plug rod comprises:

[0027] a hollow tube which can be inserted into the through hole;

[0028] a limiting ring fixed on the top of the peripheral wall of the hollow tube;

[0029] a plurality of floating plug rods which can be floatingly inserted into the bottom of the hollow tube;

[0030] a limiting rod which can be inserted into the hollow tube for extending the outer end of each floating plug rod out of the hollow tube.

[0031] A gauge is also disclosed, characterized in that it further comprises:

[0032] a base plate with a surrounding plate provided on the top of the peripheral wall and a receiving slot on the top surface;

[0033] a transverse detection member which can be transversely and slidably installed on the top of the surrounding plate and corresponds to the telescopic rod;

[0034] a rotating detection member which can be rotatably installed on the top of the surrounding plate and corresponds to the angle adjusting segment;

[0035] a pair of detection pins which can be respectively inserted into the transverse detection member and the rotating detection member.

[0036] The transverse detection member comprises:

[0037] A pair of horizontal sliding grooves are symmetrically arranged on the front side and the rear side of the top of the fence;

[0038] The horizontal moving truss is slidably installed in the pair of horizontal sliding grooves, and has a threaded sleeve and a detection hole;

[0039] The screw rod is rotatably installed on the top of the fence through a bearing frame, and one end of the screw rod is connected to the threaded sleeve through a threaded transmission, and the other end of the screw rod is provided with a hand wheel;

[0040] The horizontal moving scale is arranged on the top surface of the fence and corresponds to one of the horizontal sliding grooves.

[0041] The rotation detection member comprises:

[0042] The support plate is fixedly connected to the top of the fence and extends above the angle-adjustable section;

[0043] The rotating plate is rotatably installed on the top of the extension end of the support plate through a rotating connecting member, and the outer end of the rotating plate is provided with a detection hole;

[0044] The rotating scale is arranged on the top surface of the extension end of the support plate and surrounds the rotating plate.

[0045] A control arm detection method is also disclosed, comprising the following steps:

[0046] S1, placing the automobile control arm with adjusted angle and length into the containing groove;

[0047] S2, adjusting the horizontal moving detection member and the rotating detection member, so that each detection pin corresponds to the corresponding coordinates of the vehicle chassis mounting point of the automobile control arm to be installed;

[0048] S3, inserting each detection pin into each connecting sleeve of the automobile control arm, and detecting whether each connecting sleeve corresponds to the position of the corresponding vehicle chassis mounting point.

[0049] The beneficial effects of the present application are as follows:

[0050] 1. By arranging the fixed rod, the telescopic rod, the limiting unit, the angle-adjustable section and the adjusting unit, the angle and the length of the automobile control arm are adjusted, so that the automobile control arm can be matched with a pair of connecting sleeves and installed on different vehicle chassis, thereby improving the application range of the automobile control arm;

[0051] 2. By arranging the mounting groove, the plurality of insertion grooves, the plurality of insertion blocks, the threaded tube, the baffle, the locking bolt and the embedding groove, the length of the automobile control arm is adjusted and locked, so that the automobile control arm can adapt to the installation of different vehicle chassis;

[0052] 3. By adjusting the groove, the hole, the plurality of limiting grooves, the hollow pipe body, the limiting ring, the plurality of floating insertion rods and the limiting rod, the included angle between the angle-adjustable section and the length-adjustable section can be adjusted, the angle of the control arm body can be changed, and collision and interference with surrounding parts can be prevented when the control arm body is installed on different vehicle chassis;

[0053] 4. By the pair of detection pins, the pair of horizontal sliding grooves, the horizontal sliding truss, the screw rod, the threaded sleeve, the hand wheel, the horizontal sliding scale, the support plate, the rotating plate and the rotating scale, the detection pins can be adjusted to the vehicle chassis mounting point position of the automobile control arm to be installed, and the pair of connecting sleeves of the automobile control arm after adjustment of the length and angle can correspond to the corresponding mounting points of the corresponding chassis. BRIEF DESCRIPTION OF DRAWINGS

[0054] Figure 1 It is a top view of the automobile control arm in the embodiment of the application;

[0055] Figure 2 It is a top view of the automobile control arm in the embodiment of the application; Figure 1 It is a schematic view of the cross-sectional structure in the A-A direction;

[0056] Figure 3 It is a schematic view of the cross-sectional structure in the A-A direction; Figure 2 It is a schematic view of the cross-sectional structure in the A-A direction;

[0057] Figure 4 It is a schematic view of the cross-sectional structure in the A-A direction; Figure 2 It is a schematic view of the cross-sectional structure in the A-A direction;

[0058] Figure 5 It is a front view of the automobile control arm in the embodiment of the application;

[0059] Figure 6 It is a front view of the automobile control arm in the embodiment of the application; Figure 5 It is a schematic view of the cross-sectional structure in the A-A direction;

[0060] Figure 7 It is a schematic view of the cross-sectional structure in the A-A direction;

[0061] Figure 8 It is a top view of the automobile control arm in the embodiment of the application;

[0062] Figure 9 It is a schematic view of the cross-sectional structure in the A-A direction;

[0063] REFERENCE NUMERALS

[0064] 1-control arm body, 11-length adjustable section, 111-fixed rod, 112-telescopic rod, 113-limiting unit, 1131-threaded sleeve, 1132-stop ring, 1133-locking bolt, 1134-embedding groove, 114-mounting groove, 115-insertion slot, 116-insertion block, 12-angle adjustable section, 13-adjusting unit, 131-connection groove, 132-insertion hole, 133-limiting groove, 134-insertion rod, 1341-hollow tube body, 1342-limiting ring, 1343-floating insertion rod, 1344-limiting rod, 135-limiting protrusion, 2-connection sleeve, 3-bottom plate, 4-enclosure plate, 5-housing groove, 6-horizontal movement detection piece, 61-horizontal sliding groove, 62-horizontal movement truss, 63-screw rod, 64-hand wheel, 65-bearing frame, 66-horizontal movement scale, 7-rotation detection piece, 71-branch plate, 72-rotation plate, 73-rotation connecting piece, 731-insertion slot, 732-insertion block, 733-stop ring, 734-inclined guide ring, 735-ball groove, 736-blind hole, 737-steel ball, 8-detection bolt, 91-through hole, 92-clamp spring, 93-stop block, 94-stop groove, 95-floating groove, 96-floating plate, 97-return spring. DETAILED DESCRIPTION

[0065] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art belong to the scope of protection of the present application.

[0066] The terms "first", "second", and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally a category and do not limit the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in an "or" relationship.

[0067] The server provided by the embodiments of the present application will be described in detail below with reference to the drawings and specific embodiments and their application scenarios.

[0068] Embodiment 1:

[0069] As Figures 1 to 6As shown, the embodiment of the present application provides a kind of automobile control arm, including control arm body 1 and a pair of connecting sleeve 2, control arm body 1 includes length adjustable section 11, it includes fixed rod 111, telescopic rod 112 and restriction unit 113;Angle adjustable section 12, it is mutually fixed with fixed rod 111 by adjusting unit 13, a pair of connecting sleeve 2 is respectively fixed in telescopic rod 112 and the outer end of angle adjustable section 12.

[0070] Further, length adjustable section 11 further includes installation groove 114, it is set in the outer end of the wall of fixed rod 111, for telescopic rod 112 insertion;Several insertion slots 115, symmetrically interval setting are set on the opposite side wall of telescopic rod 112;Several plug blocks 116, symmetrically interval setting are set on the opposite side inner wall of installation groove 114, can be inserted with the corresponding insertion slot 115.

[0071] Further, restriction unit 113 includes threaded sleeve 1131, it is installed on the outer wall of fixed rod 111 by screw thread;Stop ring 1132, its outer diameter is greater than the diameter of fixed rod 111, and it is fixed on telescopic rod 112;Locking bolt 1133, it is installed on threaded sleeve 1131 by screw hole.

[0072] Further, restriction unit 113 further includes embedding groove 1134, it is set in the end of telescopic rod 112 away from connecting sleeve 2, and the lower end of locking bolt 1133 can be inserted into embedding groove 1134.

[0073] In the embodiment of the present application, since the above structure is used, when the length of control arm body 1 needs to be adjusted, the locking bolt 1133 is loosened, so that it is separated from the embedding groove 1134, then the threaded sleeve 1131 is rotated, so that it is away from the installation groove 114, the telescopic rod 112 is lifted out of the installation groove 114, after adjusting the relative position of the telescopic rod 112 and the installation groove 114, the telescopic rod 112 is inserted into the installation groove 114, the corresponding insertion slots 115 and plug blocks 116 are inserted with each other, then the threaded sleeve 1131 is rotated, so that it is covered outside the installation groove 114, the locking bolt 1133 is aligned with the embedding groove, and the locking bolt 1133 is tightened, so that the lower end of the locking bolt 1133 is inserted into the embedding groove, the length of the control arm body 1 is adjusted, when the threaded sleeve 1131 is tightened, the outer end of the threaded sleeve 1131 abuts against the stop ring 1132, a pushing force away from the installation groove 114 is applied to the telescopic rod 112, so that the insertion slots 115 and the corresponding plug blocks 116 are tightly fitted, and the connection between the telescopic rod 112 and the fixed rod 111 is tightly connected to prevent loosening.

[0074] Embodiment 2:

[0075] As Figures 1 to 6As shown, in the embodiment, in addition to the structural features of the preceding embodiments, the adjusting unit 13 comprises a connecting slot 131 provided at the end of the fixed rod 111 away from the telescopic rod 112; a socket 132 penetrating the fixed rod 111 and the connecting end of the angle adjusting segment from top to bottom; a plurality of limiting slots 133 circumferentially and spacedly provided on the inner circumferential wall of the socket 132; and a plug rod 134 which can be inserted into the socket 132 and has limiting protrusions 135 on the circumferential wall for plugging with the limiting slots 133.

[0076] Further, the plug rod 134 comprises a hollow tube body 1341 which can be inserted into the socket 132; a limiting ring 1342 fixedly connected to the top of the outer circumferential wall of the hollow tube body 1341; a plurality of floating plug rods 1343 which can be floatingly inserted into the bottom of the hollow tube body 1341; and a limiting rod 1344 which can be inserted into the hollow tube body 1341 for extending the outer end of each floating plug rod 1343 out of the hollow tube body 1341.

[0077] Further, it further comprises a through hole 91 penetrating the upper end of the limiting rod 1344 from left to right; a clamping spring 92 which can be inserted into the through hole 91; a plurality of stop blocks 93 circumferentially and spacedly fixedly connected to the lower end of the outer circumferential wall of the limiting rod 1344; and a plurality of stop slots 94 respectively provided at the bottom of the inner end of each floating plug rod 1343.

[0078] Further, it further comprises a plurality of floating slots 95 circumferentially distributed, one end of each of which is communicated with the inner cavity of the hollow tube body 1341; a plurality of floating plates 96 respectively fixedly connected to each limiting rod 1344 and slidable in the corresponding floating slot 95; a plurality of return springs 97 respectively sleeved on the outer wall of each limiting rod 1344, two ends of each of which are respectively in abutment with the corresponding floating plate 96 and the inner end of the corresponding floating slot 95, and the inner end of each limiting rod 1344 is inclinedly arranged.

[0079] In this embodiment of the application, due to the above-described structure, when it is necessary to adjust the angle of the control arm body 1, the retaining spring 92 is removed, and the limiting rod 1344 is pulled out of the inner cavity of the hollow tube 1341. At this time, each return spring 97 releases its elastic potential energy, pushing the outer end of each floating insert rod 1343 back into the corresponding floating groove 95. At this time, the insert rod 134 can be lifted to disengage it from the insertion hole 132. The angle adjustable section 12 is rotated to adjust the angle between it and the fixed rod 111 to the required degree. The insert rod 134 is then inserted into the insertion hole 132. Each limiting groove 133 engages with the corresponding limiting protrusion 135, so that the fixed rod 111 and the angle adjustable section 1342 are engaged. Once the position is fixed between 2, continue pressing the insertion rod 134 downwards until each floating insertion rod 1343 moves below the fixed rod 111. Then, insert the end of the limiting rod 1344 with the insertion hole 132 from the bottom of the inner cavity of the hollow tube 1341, and cooperate with the inner inclined surface of each floating insertion rod 1343 to push each floating insertion rod 1343 outwards. Each floating plate 96 slides in the corresponding floating groove 95, and each return spring 97 is locked by pressure. Continue to apply pressure to the limiting rod 1344 so that its top end extends above the middle hole tube. Insert the snap ring 92 into the corresponding through hole 91, and insert the stop block 93 into the stop groove 94 to complete the angle adjustment of the control arm body 1.

[0080] Example 3:

[0081] like Figures 7 to 8 As shown, in this embodiment, a gauge is also disclosed, which includes a base plate 3, a surrounding plate 4 on its top periphery, and a receiving groove 5 on its top surface; a transverse detection element 6, which can be transversely slidably installed on the top of the surrounding plate 4, corresponding to a telescopic rod 112; a rotation detection element 7, which can be rotatably installed on the top of the surrounding plate 4, corresponding to an angle adjustable section 12; and a pair of detection pins 8, which can be inserted into the transverse detection element 6 and the rotation detection element 7 respectively.

[0082] Furthermore, the transverse movement detection component 6 includes a pair of transverse sliding grooves 61, which are arranged parallel and symmetrically on the front and rear sides of the top of the enclosure 4; a transverse movement truss 62, which can be slidably installed in the pair of transverse sliding grooves 61, and has a threaded sleeve and a detection hole; a screw 63, one end of which is connected to the threaded sleeve through a threaded drive, and the other end is equipped with a handwheel 64, and the middle part is rotatably installed on the top of the enclosure 4 through a bearing bracket 65; and a transverse movement scale 66, which is set on the top surface of the enclosure 4 and corresponds to one of the transverse sliding grooves 61.

[0083] Furthermore, the rotating detection component 7 includes a support plate 71, which is fixed to the top of the enclosure plate 4 and extends above the angle adjustable section 12; a rotating plate 72, which is rotatably mounted on the top of the extension end of the support plate 71 via a rotating connector 73, and has a detection hole at its outer end; and a rotating scale 74, which is set on the top surface of the extension end of the support plate 71 and surrounds the rotating plate 72.

[0084] Further, the rotary connecting piece 73 comprises a plug-in groove 731 arranged on the top surface of the extension end of the supporting plate 71, a plug-in block 732 rotatably connected with the rotary plate 72 through a rotary hole, and the lower end of the plug-in block 732 is inserted into the plug-in groove 731 and is fixedly connected with the plug-in groove 731 through the screw rod 63, a stop ring 733 fixedly connected with the top end of the plug-in block 732, and an inclined guide ring 734 arranged between the lower end of the stop ring 733 and the outer circumferential wall of the plug-in block 732, and the top end of the rotary hole is inclined outward.

[0085] Further, the rotary connecting piece 73 further comprises a plurality of ball grooves 735 circumferentially and spacedly arranged around the plug-in block 732 and arranged on the top surface of the extension end of the supporting plate 71, a plurality of blind holes 736 circumferentially and spacedly arranged around the plug-in block 732 and arranged on the bottom surface of the stop ring 733, and a plurality of steel balls 737 movably arranged in the corresponding blind holes 736 through the corresponding springs.

[0086] Meanwhile, a control arm detection method is disclosed, and the method comprises the following steps:

[0087] S1, placing the automobile control arm with adjusted angle and length into the accommodating groove 5;

[0088] S2, adjusting the horizontal movement detection member 6 and the rotary detection member 7, so that each detection pin 8 corresponds to the corresponding coordinate of the vehicle chassis mounting point of the automobile control arm to be installed;

[0089] S3, inserting each detection pin 8 into each connecting sleeve 2 of the automobile control arm, and detecting whether each connecting sleeve 2 corresponds to the position of the corresponding vehicle chassis mounting point.

[0090] In the embodiment of the present application, since the above structure and method are adopted, the position of each detection pin 8 is adjusted according to the position information of the mounting point of the vehicle chassis of the control arm body 1, the screw rod 63 is rotated through the hand wheel 64, the screw rod 63 is matched with the threaded sleeve to drive the horizontal movement truss 62 to slide in the pair of horizontal sliding grooves 61, the position of the corresponding detection hole and the detection pin 8 is changed, whether the corresponding detection hole and the detection pin 8 move to the specified position is judged according to the corresponding position of the horizontal movement truss 62 and the horizontal movement scale 66, the rotary plate 72 is rotated around the circumference of the plug-in block 732 and the rotary hole by driving the rotary plate 72, each steel ball 737 is matched with the corresponding ball groove 735 under the action of the corresponding spring, so that the rotary plate 72 is fixed after rotating a certain angle, whether the detection hole and the detection pin 8 corresponding to the rotary plate 72 move to the specified position is judged according to the corresponding position of the rotary plate 72 and the rotary scale 74, and meanwhile, the rotary plate 72 is lifted upward by the spring, so that the inclined surface at the top of the rotary hole is tightly attached to the outer wall of the inclined guide ring 734, and the horizontal state of the rotary plate 72 is ensured.

[0091] It should be noted that, in the present document, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element. Furthermore, it is to be understood that the method and apparatus of the present application can be carried out by someone other than the person named in the independent claims, and that the scope of the independent claims is not limited to the person named in the independent claims. In addition, it should be noted that the scope of the method and apparatus of the present application is not limited to performing the functions in the order discussed or illustrated, but can include performing the functions in a substantially simultaneous manner or in the reverse order, for example, the described method can be performed in an order different from that described, and various steps can be added, omitted, or combined, in addition, features described with reference to certain examples can be combined in other examples.

[0092] The embodiments of the present application are described above with reference to the accompanying drawings, but the present application is not limited to the specific embodiments described above, which are merely illustrative and not restrictive, and a person of ordinary skill in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims.

Claims

1. A control arm for a vehicle comprising a control arm body (1) and a pair of connecting sleeves (2), characterized in that, The control arm body (1) comprises: A length-adjustable section (11) comprising a fixed rod (111), a telescopic rod (112) and a limiting unit (113); An angle-adjustable section (12) which is fixed to the fixed rod (111) through an adjusting unit (13); Wherein, a pair of the connecting sleeves (2) are respectively fixed to the outer ends of the telescopic rod (112) and the angle-adjustable section (12); The adjusting unit (13) comprises a connecting groove (131) arranged at the end of the fixed rod (111) away from the telescopic rod (112), a plug hole (132) which penetrates the fixed rod (111) and the connecting end of the angle-adjustable section from top to bottom, a plurality of limiting grooves (133) which are arranged on the inner circumferential wall of the plug hole (132) in a circumferential direction, and a plug rod (134) which can be inserted into the plug hole (132) and has limiting protrusions (135) on the circumferential wall for plugging with each limiting groove (133); The plug rod (134) comprises a hollow tube body (1341) which can be inserted into the plug hole (132), a limiting ring (1342) which is fixed to the top of the outer circumferential wall of the hollow tube body (1341), a plurality of floating plug rods (1343) which can be floatingly inserted into the bottom of the hollow tube body (1341), and a limiting rod (1344) which can be inserted into the hollow tube body (1341) and used for making the outer ends of each floating plug rod (1343) protrude out of the hollow tube body (1341); Further comprising a through hole (91) which penetrates the upper end of the limiting rod (1344) from left to right, a clamping spring (92) which can be inserted into the through hole (91), a plurality of stop blocks (93) which are fixed to the lower end of the outer circumferential wall of the limiting rod (1344) in a circumferential direction, and a plurality of stop grooves (94) which are respectively arranged at the bottom of the inner end of each floating plug rod (1343); Further comprising a plurality of floating grooves (95) which are distributed in a circumferential direction and have one end communicated with the inner cavity of the hollow tube body (1341), a plurality of floating plates (96) which are respectively fixed to each limiting rod (1344) and can slide in the corresponding floating groove (95), and a plurality of return springs (97) which are respectively sleeved on the outer wall of each limiting rod (1344) and have two ends respectively abutting against the corresponding floating plate (96) and the inner end of the corresponding floating groove (95), and the inner end of each limiting rod (1344) is arranged in an inclined manner at the lower part; When the angle of the control arm body (1) needs to be adjusted, the snap spring (92) is removed, the limiting rod (1344) is pulled out of the inner cavity of the hollow pipe body (1341), and each reset spring (97) releases the elastic potential energy at this time, pushing the outer end of each floating plug rod (1343) to retract into the corresponding floating groove (95). At this time, the plug rod (134) can be lifted to make it disengage from the plug hole (132), the angle adjustable section (12) is rotated, and the angle between it and the fixed rod (111) is adjusted to the required degree. The plug rod (134) is inserted into the plug hole (132), each limiting groove (133) and the corresponding limiting convex edge (135) are mutually engaged, the fixed rod (111) and the angle adjustable section (12) are fixed, the plug rod (134) is continuously pressed downward until each floating plug rod (1343) moves below the fixed rod (111), and then the end of the plug hole (132) of the limiting rod (1344) is inserted into the inner cavity bottom end of the hollow pipe body (1341) to cooperate with the inner end inclined surface of each floating plug rod (1343), pushing each floating plug rod (1343) to extend outward, each floating plate (96) slides in the corresponding floating groove (95), each reset spring (97) is locked under pressure, and the limiting rod (1344) is continuously pressed to make the top end extend above the middle hole pipe body. By inserting the snap spring (92) into the corresponding through hole (91) and inserting the stop block (93) into the stop groove (94), the angle adjustment of the control arm body (1) is completed.

2. The control arm of claim 1, wherein, The length adjustable section (11) further comprises: a mounting groove (114) provided on the outer end of the wall of the fixed rod (111) for inserting the telescopic rod (112); a plurality of insertion grooves (115) symmetrically and spaced apart on the opposite side wall of the telescopic rod (112); a plurality of insertion blocks (116) symmetrically and spaced apart on the opposite inner wall of the mounting groove (114), which can be inserted and cooperated with the corresponding insertion groove (115).

3. The control arm of claim 2, wherein: The limiting unit (113) comprises: a threaded sleeve (1131) installed on the outer wall of the fixed rod (111) by threading; a stop ring (1132) fixedly connected to the telescopic rod (112), the cross-sectional diameter of which is greater than the diameter of the fixed rod (111); a locking bolt (1133) installed on the threaded sleeve (1131) by a threaded hole.

4. The control arm of claim 3, wherein the first and second arms are formed from a single piece of material. The limiting unit (113) further comprises: an embedded groove (1134) provided on the end of the telescopic rod (112) away from the connecting sleeve (2); wherein the lower end of the locking bolt (1133) can be inserted into the embedded groove (1134).

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