Connecting arm floating type centering device

Abstract

The invention relates to a floating type centering device for a connecting arm. A first base on a base plate is provided with a connecting arm positioning shaft; a horizontal guide rod is movably arranged in a second base on the base plate; the V-shaped positioning block is positioned between the first base and the second base; the side, close to the second base, of the V-shaped positioning block is connected with the horizontal guide rod, and the side, away from the second base, of the V-shaped positioning block is provided with a V-shaped positioning groove. The central axis of the V-shaped positioning groove is collinear with the straight line; the elastic floating piece is installed on the second base and connected with the V-shaped positioning block. During centering, one end of the connecting arm is directly connected with the connecting arm positioning shaft, then the other end of the connecting arm is clamped with the V-shaped positioning groove, the center of the workpiece is aligned according to the V-shaped self-centering principle, and centering is completed. When the thickness of a workpiece blank fluctuates, the V-shaped positioning block moves in the limiting direction of the horizontal guide rod due to thickness fluctuation, the elastic floating piece is compressed, it is guaranteed that the V-shaped positioning block is attached to the workpiece all the time, the whole workpiece does not deviate or rotate, and the floating centering effect is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle parts processing, and in particular to a connecting arm floating centering device. Background Art

[0002] At present, in order to improve comfort, heavy trucks have a stabilizer bar structure under the cab, and a key component in the stabilizer bar structure is the connecting arm. There is a thin-walled large hole on the connecting arm, which plays a connecting role and bears load. During the processing, it is necessary to ensure that the wall thickness on both sides of the large hole is uniform. However, due to the fluctuation of the blank thickness, the wall thickness on both sides of the large hole is inconsistent, and due to the influence of the blank thickness deviation, there is a possibility that the wall thickness of the workpiece is insufficient, resulting in the scrapping of the workpiece.

[0003] refer to Figure 1 As shown, the fixture solution relies on the positioning seat a, positioning washer b, positioning pin c and positioning side stop d to complete the workpiece positioning. Among them, by adjusting the positioning bolt on the positioning side stop d to contact the outer circle of the workpiece blank e (connecting arm), centering is achieved through two contact points; however, there are the following problems:

[0004] Under normal circumstances, the positioning bolt is adjusted to make the positioning bolt contact the outer circle of the workpiece blank, that is, the two contact points are limited by the contact with the outside of the workpiece to complete the centering; however, when the thickness of the workpiece blank fluctuates, if the method of centering is still adopted as long as the two contact points are in contact with the outside of the workpiece, the workpiece blank will be offset and rotated around the positioning pin c, resulting in uneven wall thickness of the large hole after processing. Summary of the invention

[0005] An embodiment of the present application provides a connecting arm floating centering device to solve the problem in the related art that during the centering process of the fixture, when the thickness of the workpiece blank fluctuates, the position of the workpiece will rotate around the positioning pin, thereby causing uneven wall thickness of the large hole after processing.

[0006] In a first aspect, a connecting arm floating centering device is provided, comprising:

[0007] A base plate is provided with a first base and a second base which are located on the same straight line and are spaced apart from each other, a connecting arm positioning shaft is provided on the first base, and a horizontal guide rod is movably provided in the second base;

[0008] A V-shaped positioning block is located between the first base and the second base, and a side of the V-shaped positioning block close to the second base is connected to the horizontal guide rod, and a side of the V-shaped positioning block away from the second base is provided with a V-shaped positioning groove; the central axis of the V-shaped positioning groove is arranged in a collinear manner with the straight line;

[0009] An elastic floating member is installed on the second base and connected to the V-shaped positioning block.

[0010] In some embodiments, two first borings are provided in the second base, a second boring is provided between the two first borings; the horizontal guide rod is provided in the second boring;

[0011] One end of the elastic floating member is connected to the V-shaped positioning block, and the other end is located in the first boring hole.

[0012] In some embodiments, the first boring hole is provided with a second base and includes a guide section and a mounting section; the diameter of the guide section is smaller than the diameter of the mounting section; a thread groove is provided on the inner wall of the mounting section;

[0013] The elastic floating member includes a round rod; one end of the round rod is connected to the V-shaped positioning block, and the other end passes through the guide section and extends into the installation section; the portion of the round rod located in the installation section is connected to a spring; an end of the spring away from the round rod is provided with a threaded locking block, which is connected to the threaded groove.

[0014] In some embodiments, the second boring hole penetrates the second base;

[0015] A second boring is formed at one end of the horizontal guide rod away from the V-shaped positioning block, and the second boring is extended outward to form an extended section;

[0016] The extended section is provided with a mounting hole; a connecting rod is provided between the extended sections of the two horizontal guide rods, and an eccentric wheel is rotatably provided on the connecting rod; the eccentric wheel is in contact with the side surface of the second base; and a pushing handle is provided on the eccentric wheel.

[0017] In some embodiments, a horizontal guide rod mounting groove and a round rod mounting groove are provided in the V-shaped positioning block.

[0018] In some embodiments, the V-shaped positioning groove includes a straight portion, both ends of the straight portion are provided with inclined portions, and the inclined portions are provided with wear-resistant pads.

[0019] In some embodiments, the base plate is further provided with a first vertical stopper located near the first base, and the first vertical stopper is provided with a semicircular groove, which is used to contact the circumferential groove on the outer side of the first rotating body at one end of the connecting arm;

[0020] The base plate is also provided with a second vertical stopper installed on the top of the second base, and the second vertical stopper has a blocking portion that contacts the top of the second rotating body at the other end of the connecting arm.

[0021] In some embodiments, the base plate is provided with a plurality of groups of mounting screw holes, and a group of mounting screw holes includes four mounting screw holes; the plurality of groups of mounting screw holes are spaced apart along a straight line; the first base and the second base are respectively connected to a corresponding group of mounting screw holes;

[0022] The first vertical limiter is connected to the base plate through a first connecting stud; the first vertical limiter is provided with a first waist-shaped hole extending along the straight line, the top of the first connecting stud is penetrated by the first waist-shaped hole and connected with a clamping nut; the bottom of the first vertical limiter is provided with a support column in contact with the top surface of the base plate;

[0023] The second vertical limit piece is provided with a second waist-shaped hole extending along the straight line, and the bottom of the second vertical limit piece is provided with a support arm in contact with the top of the second base; the base plate is provided with a second connecting stud, the second connecting stud passes through the second waist-shaped hole, and a clamping nut is provided on the top.

[0024] In some embodiments, a positioning washer is provided on the substrate and between the first base and the V-shaped positioning block; the positioning washer has a designed height value.

[0025] In some embodiments, the substrate is provided with a plurality of positioning washer connection holes, the positioning washer is provided with via holes corresponding to the positioning washer connection holes; and screws connected to the positioning washer connection holes are provided in the via holes.

[0026] The beneficial effects of the technical solution provided by this application include:

[0027] The embodiment of the present application provides a connecting arm floating centering device, wherein a first base and a second base are spaced apart and located on the same straight line on the substrate, a connecting arm positioning shaft is provided on the first base; a horizontal guide rod is movably provided in the second base; a V-shaped positioning block is located between the first base and the second base; a side of the V-shaped positioning block close to the second base is connected to the horizontal guide rod, and a side away from the second base is provided with a V-shaped positioning groove; the central axis of the V-shaped positioning groove is arranged in line with the straight line; an elastic floating member is installed on the second base and connected to the V-shaped positioning block; through the above arrangement, when in use, one end of the connecting arm is directly connected to the connecting arm positioning shaft, and then The other end engages with the V-shaped locating groove, and the V-shaped self-centering principle is used to find the center of the workpiece to complete the centering. When the thickness of the workpiece blank fluctuates, because the horizontal guide rod limits the V-shaped locating block to move only in a straight line, the thickness fluctuation will cause the V-shaped locating block to produce pressure on the elastic floating part, and the elastic floating part is compressed, so that the V-shaped locating block only moves in a straight line. During this process, the elastic force of the elastic floating part makes the V-shaped locating block always keep in contact with the workpiece, and the entire workpiece will not deviate or rotate, thus achieving a floating centering effect, solving the problem that when the thickness of the workpiece blank fluctuates, the workpiece position will deviate and rotate around the locating pin as the center, thereby causing uneven wall thickness of the large hole after processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 A centering fixture structure provided in the related art;

[0030] Figure 2 A schematic diagram of a centering fixture provided in the related art causing an offset rotation state;

[0031] Figure 3 A schematic diagram of a state in which a floating centering device for a connecting arm provided in an embodiment of the present application performs floating centering;

[0032] Figure 4 A schematic diagram of the structure of a floating centering device for a connecting arm for placing a workpiece provided in an embodiment of the present application;

[0033] Figure 5 Provided for the embodiments of this application Figure 4 A top view of the

[0034] Figure 6 Provided for the embodiments of this application Figure 4 The main view in ;

[0035] Figure 7 A schematic plan view of the connection relationship between the V-shaped positioning block, the elastic floating member, the horizontal guide rod and the second base provided in an embodiment of the present application;

[0036] Figure 8 A schematic diagram of the structure of a connecting arm floating centering device provided in an embodiment of the present application;

[0037] Fig. 9 A schematic diagram of the three-dimensional structure of the connection relationship between the V-shaped positioning block, the elastic floating member, and the horizontal guide rod provided in the embodiment of the present application;

[0038] Fig.10 A schematic diagram of a V-shaped positioning block connected to a wear-resistant pad provided in an embodiment of the present application.

[0039] In the figure: 1, base plate; 2, first base; 3, second base; 300, first boring hole; 301, second boring hole; 4, connecting arm positioning shaft; 5, horizontal guide rod; 6, V-shaped positioning block; 7, V-shaped positioning groove; 8, elastic floating member; 800, round rod; 801, spring; 802, threaded locking block; 9, eccentric wheel; 10, push handle; 11, wear-resistant pad; 12, first vertical limit member; 1200, first waist-shaped hole; 1201, support column; 13, second vertical limit member; 1300, second waist-shaped hole; 1301, support arm; 14, first connecting stud; 15, second connecting stud; 16, positioning washer. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0041] refer to Figure 1 As shown in the figure, the fixture solution relies on the positioning seat a, positioning washer b, positioning pin c and positioning side stop d to complete the workpiece positioning. Among them, by adjusting the positioning bolt on the positioning side stop d to contact the outer circle of the workpiece blank, centering is achieved through two contact points; however, there are the following problems:

[0042] Under normal circumstances, the positioning bolt is adjusted to make the positioning bolt contact the outer circle of the workpiece blank, that is, the two contact points are limited by the contact with the outside of the workpiece to complete the centering; however, when the thickness of the workpiece blank fluctuates, if the method of centering is still adopted as long as the two contact points are in contact with the outside of the workpiece, the workpiece blank will be offset and rotated around the positioning pin c, resulting in uneven wall thickness of the large hole after processing.

[0043] The problem of offset caused by the fixed position of the two contact points can be referred to Figure 2 The content shown is Figure 2 The normal workpiece centering state in the figure is as follows: Under normal circumstances, the positioning bolt is adjusted to make the positioning bolt contact the outer circle of the workpiece blank, that is, the two contact points are contacted with the outer side of the workpiece to limit the position and complete the centering;

[0044] exist Figure 2 The centering state of the workpiece in the workpiece blank thickness fluctuation is shown as follows: when the workpiece blank thickness fluctuates, in fact, after the two contact points contact the outside of the workpiece, the center of the workpiece has deviated, and the workpiece blank rotates with the positioning pin c as the center, and the rotation angle is f.

[0045] Another difficulty is that operators cannot visually identify the rough thickness fluctuations. Even after identifying them, they still need to calculate the specific thickness difference and then calculate the number of turns of the positioning bolt knob that needs to be adjusted. This will make the entire centering process extremely cumbersome and inefficient. What we should understand is that Figure 1 When using the clamp shown, there is no need to pay attention to the number of turns of the positioning bolt knob. You only need to pay attention to whether it contacts the outside of the workpiece. Once it contacts, it is assumed that the centering is completed.

[0046] therefore, Figure 1 The fixture shown has certain defects. The embodiment of the present application provides a connecting arm floating centering device to solve the problem that during the centering process of the fixture in the related technology, when the thickness of the workpiece blank fluctuates, the position of the workpiece will rotate around the positioning pin, thereby causing uneven wall thickness of the large hole after processing.

[0047] See also Figure 3-Figure 8 , a connecting arm floating centering device, comprising:

[0048] A base plate 1 is provided with a first base 2 and a second base 3 which are located on the same straight line and are spaced apart from each other. A connecting arm positioning shaft 4 is provided on the first base 2; a horizontal guide rod 5 is movably provided inside the second base 3;

[0049] A V-shaped positioning block 6 is located between the first base 2 and the second base 3, and a side thereof close to the second base 3 is connected to the horizontal guide rod 5. A side of the V-shaped positioning block 6 away from the second base 3 is provided with a V-shaped positioning groove 7; the central axis of the V-shaped positioning groove 7 is arranged collinearly with the straight line;

[0050] The elastic floating member 8 is mounted on the second base 3 and connected to the V-shaped positioning block 6. Through the above arrangement, when in use, one end of the connecting arm is directly connected to the connecting arm positioning shaft 4, and then the other end is engaged with the V-shaped positioning groove 7, and the V-shaped self-centering principle is used to align the center of the workpiece to complete the centering; when the thickness of the workpiece blank fluctuates, because the horizontal guide rod 5 limits the V-shaped positioning block 6 to move only in a straight line, the thickness fluctuation will cause the V-shaped positioning block 6 to produce pressure on the elastic floating member 8, and the elastic floating member 8 is compressed, so that the V-shaped positioning block 6 only moves in a straight line. In this process, the elastic force of the elastic floating member 8 keeps the V-shaped positioning block 6 always in contact with the workpiece, and the entire workpiece will not deviate or rotate, achieving a floating centering effect, solving the problem that when the thickness of the workpiece blank fluctuates, the position of the workpiece will deviate and rotate around the positioning pin as the center, thereby causing uneven wall thickness of the large hole after processing.

[0051] The principle of floating centering described above can be referred to in the attached Figure 3From the comparison diagram shown in the figure, we can clearly see that when the thickness of the workpiece fluctuates, pressure will be generated on the elastic floating member 8, and the V-shaped positioning block 6 will move, which will eventually convert the thickness fluctuation of the workpiece into elastic deformation, so that the V-shaped positioning block 6 moves; the V-shaped positioning block 6 will not cause the workpiece to deviate during its movement, and the elastic force of the elastic floating member 8 will ensure the centering effect by fitting with the workpiece. The displacement is Figure 3 The mark g in .

[0052] In some preferred embodiments, the connection relationship between the V-shaped positioning block 6, the elastic floating member 8, the horizontal guide rod 5 and the second base 3 is specifically described, and ... are specifically described, and the connection relationship between the V-shaped positioning block Figure 4-Figure 7 , specifically:

[0053] Two first boring holes 300 are provided in the second base 3, and a second boring hole 301 is provided between the two first boring holes 300; a horizontal guide rod 5 is provided in the second boring hole 301;

[0054] One end of the elastic floating member 8 is connected to the V-shaped positioning block 6 , and the other end is located in the first boring hole 300 .

[0055] The first boring hole 300 penetrates the second base 3 and includes a guide section and a mounting section; the diameter of the guide section is smaller than the diameter of the mounting section; a thread groove is provided on the inner wall of the mounting section;

[0056] The elastic floating member 8 includes a round rod 800; one end of the round rod 800 is connected to the V-shaped positioning block 6, and the other end passes through the guide section and extends into the installation section; the portion of the round rod 800 located in the installation section is connected to a spring 801; the end of the spring 801 away from the round rod 800 is provided with a thread locking block 802, and the thread locking block 802 is connected to the thread groove. The above specifically shows the specific structure and installation method of the elastic floating member 8.

[0057] Further, in order to facilitate the placement of the connecting arm, that is, the workpiece, and to ensure that the V-shaped positioning block 6 does not block the workpiece, the following settings are provided:

[0058] The second boring hole 301 penetrates the second base 3;

[0059] A second boring hole 301 is formed at one end of the horizontal guide rod 5 away from the V-shaped positioning block 6, and extends outward to form an extended section;

[0060] The extended section is provided with a mounting hole; a connecting rod is provided between the extended sections of the two horizontal guide rods 5, and an eccentric wheel 9 is rotatably provided on the connecting rod; the eccentric wheel 9 contacts the side surface of the second base 3; and a pushing handle 10 is provided on the eccentric wheel 9.

[0061] When in use, the eccentric wheel 9 is rotated by pushing the handle 10, so that the horizontal guide rod 5 moves and pulls the V-shaped positioning block 6 to move toward the second base 3, so as to facilitate the placement of the workpiece; after the placement is completed, the eccentric wheel 9 is rotated in the opposite direction, and the spring 801 releases the compressed force so that the round rod 800 pushes the V-shaped positioning block 6 to return to its original position and fit the workpiece; the above extension section and connecting rod provide an installation position for the eccentric wheel 9.

[0062] In addition, in order to facilitate the connection between the round rod 800, the horizontal guide rod 5 and the V-shaped positioning block 6, a horizontal guide rod mounting groove and a round rod mounting groove are provided in the V-shaped positioning block 6.

[0063] In some preferred implementations, refer to the attached Fig. 9 and attached Fig.10 The V-shaped positioning groove 7 includes a straight portion, and two ends of the straight portion are provided with inclined portions, and the inclined portions are provided with wear-resistant pads 11. Such a setting can provide a larger avoidance space, so that the V-shaped positioning groove 7 can be used for different connecting arms, and the thickness at different positions fluctuates; in addition, the wear-resistant pads 11 are quenched parts to avoid wear caused by long-term use.

[0064] In some preferred embodiments, since the above is only limited in the plane, in order to further achieve the limit in the vertical direction, ensure the limiting effect of the device, and facilitate the subsequent processing, the following settings are provided:

[0065] The base plate 1 is also provided with a first vertical stopper 12 located near the first base 2. The first vertical stopper 12 is provided with a semicircular groove, which is used to contact the circumferential groove on the outer side of the first rotating body at one end of the connecting arm; the circumferential groove is a structure with large ends and small middle in the vertical direction, so vertical stopper can be achieved, that is, the diameter of the semicircular groove is smaller than the diameter of the ends of the circumferential groove;

[0066] A second vertical stopper 13 mounted on the top of the second base 3 is also provided on the base plate 1. The second vertical stopper 13 has a blocking portion that contacts the top of the second rotating body at the other end of the connecting arm.

[0067] The above realizes the vertical limiting, ensures the limiting effect of the device, and facilitates the later processing.

[0068] Furthermore, in order to ensure that the vertical limit structure does not interfere with the workpiece during the placement of the workpiece, and to achieve the limit of workpieces of different sizes in the plane, the following settings are made:

[0069] The base plate 1 is provided with a plurality of mounting screw holes, wherein a group of mounting screw holes includes four mounting screw holes; the plurality of mounting screw holes are spaced apart along a straight line; the first base 2 and the second base 3 are respectively connected to a corresponding group of mounting screw holes;

[0070] The first vertical stopper 12 is connected to the base plate 1 through the first connecting stud 14; the first vertical stopper 12 is provided with a first waist-shaped hole 1200 extending in a straight line, the first connecting stud 14 is penetrated with the first waist-shaped hole 1200 at the top and connected with a clamping nut; the bottom of the first vertical stopper 12 is provided with a support column 1201 in contact with the top surface of the base plate 1;

[0071] The second vertical limiter 13 is provided with a second waist-shaped hole 1300 extending in a straight line, and the bottom of the second vertical limiter 13 is provided with a support arm 1301 in contact with the top of the second base 3; the base plate 1 is provided with a second connecting stud 15, the second connecting stud 15 passes through the second waist-shaped hole 1300, and a clamping nut is provided on the top.

[0072] The above can make the first base 2 and the second base 3 connected to the mounting screw holes at different positions respectively, and the distance between the two can be changed to adapt to workpieces of different sizes; in addition, the second vertical limiter 13 is not fixedly connected to the second base 3, but can be rotated, and the horizontality is ensured by the support arm 1301; the first vertical limiter 12 is not fixedly connected to the base plate 1, but can be rotated, and the horizontality is ensured by the support column 1201; therefore, when placing the workpiece, the first vertical limiter 12 and the second vertical limiter 13 are rotated, and then reset after the workpiece is placed; then the clamping nut is twisted to press the first vertical limiter 12 and the second vertical limiter 13 downward to fix it. In addition, the second waist-shaped hole 1300 and the first waist-shaped hole 1200 allow the first vertical limiter 12 and the second vertical limiter 13 to move in a straight line, and after moving to the required position, the clamping nut is twisted.

[0073] In some preferred embodiments, a positioning washer 16 is provided on the substrate 1 and between the first base 2 and the V-shaped positioning block 6; the positioning washer 16 has a designed height value. A plurality of positioning washer connection holes are provided on the substrate 1, and a through hole corresponding to the positioning washer connection hole is provided on the positioning washer 16; a screw connected to the positioning washer connection hole is provided in the through hole.

[0074] The above designed height value can make the whole workpiece in a horizontal state, ensure that the end connected to the connecting arm positioning shaft 4 is coaxial with the connecting arm positioning shaft 4, and then finally achieve the upper and lower, left and right, front and back directions through the above structure. The designed height value depends on the height difference of the bottom surface at both ends of the connecting arm.

[0075] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0076] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0077] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A connecting arm floating centering device, characterized in that: It includes: A base plate (1) is provided with a first base (2) and a second base (3) located on the same straight line and spaced apart, the first base (2) being provided with a connecting arm positioning shaft (4); a horizontal guide rod (5) is movably provided in the second base (3); A V-shaped positioning block (6) is located between the first base (2) and the second base (3), and a side of the V-shaped positioning block (6) close to the second base (3) is connected to the horizontal guide rod (5), and a side of the V-shaped positioning block (6) away from the second base (3) is provided with a V-shaped positioning groove (7); the central axis of the V-shaped positioning groove (7) is arranged colinearly with the straight line; An elastic floating member (8) is mounted on the second base (3) and connected to the V-shaped positioning block (6).

2. The connecting arm floating centering device according to claim 1, characterized in that: The second base (3) is provided with two first boring holes (300), and a second boring hole (301) is provided between the two first boring holes (300); the horizontal guide rod (5) is provided in the second boring hole (301); One end of the elastic floating member (8) is connected to the V-shaped positioning block (6), and the other end is located in the first boring hole (300).

3. The connecting arm floating centering device according to claim 2, characterized in that: The first boring hole (300) passes through the second base (3) and comprises a guide section and a mounting section; the diameter of the guide section is smaller than the diameter of the mounting section; a thread groove is provided on the inner wall of the mounting section; The elastic floating member (8) comprises a round rod (800); one end of the round rod (800) is connected to the V-shaped positioning block (6), and the other end passes through the guide section and extends into the installation section; the portion of the round rod (800) located in the installation section is connected to a spring (801); an end of the spring (801) away from the round rod (800) is provided with a thread locking block (802), and the thread locking block (802) is connected to the thread groove.

4. The connecting arm floating centering device according to claim 2, characterized in that: The second boring hole (301) is provided through the second base (3); A second boring hole (301) is formed at one end of the horizontal guide rod (5) away from the V-shaped positioning block (6), and extends outward to form an extended section; The extended section is provided with a mounting hole; a connecting rod is provided between the extended sections of the two horizontal guide rods (5), and an eccentric wheel (9) is rotatably provided on the connecting rod; the eccentric wheel (9) is in contact with the side surface of the second base (3); and a pushing handle (10) is provided on the eccentric wheel (9).

5. The connecting arm floating centering device according to claim 3, characterized in that: The V-shaped positioning block (6) is provided with a horizontal guide rod installation groove and a round rod installation groove.

6. The connecting arm floating centering device according to claim 1, characterized in that: The V-shaped positioning groove (7) comprises a straight portion, both ends of the straight portion are provided with inclined portions, and the inclined portions are provided with wear-resistant pads (11).

7. The connecting arm floating centering device according to claim 1, characterized in that: The base plate (1) is also provided with a first vertical stopper (12) located near the first base (2), and the first vertical stopper (12) is provided with a semicircular groove, which is used to contact the circumferential groove on the outer side of the first rotating body at one end of the connecting arm; The base plate (1) is also provided with a second vertical stopper (13) mounted on the top of the second base (3), and the second vertical stopper (13) has a blocking portion in contact with the top of the second rotating body at the other end of the connecting arm.

8. The connecting arm floating centering device according to claim 7, characterized in that: The base plate (1) is provided with a plurality of groups of mounting screw holes, wherein a group of mounting screw holes includes four mounting screw holes; the plurality of groups of mounting screw holes are distributed along a straight line at intervals; the first base (2) and the second base (3) are respectively connected to a corresponding group of mounting screw holes; The first vertical stopper (12) is connected to the base plate (1) via a first connecting stud (14); a first waist-shaped hole (1200) extending along the straight line is provided on the first vertical stopper (12); the first waist-shaped hole (1200) is penetrated through the top of the first connecting stud (14) and is connected with a clamping nut; a support column (1201) in contact with the top surface of the base plate (1) is provided at the bottom of the first vertical stopper (12); The second vertical limiter (13) is provided with a second waist-shaped hole (1300) extending along the straight line, and the bottom of the second vertical limiter (13) is provided with a support arm (1301) in contact with the top of the second base (3); the base plate (1) is provided with a second connecting stud (15), the second connecting stud (15) passes through the second waist-shaped hole (1300), and a clamping nut is provided on the top.

9. The connecting arm floating centering device according to claim 1, characterized in that: A positioning washer (16) is provided on the substrate (1) and between the first base (2) and the V-shaped positioning block (6); the positioning washer (16) has a designed height value.

10. The connecting arm floating centering device according to claim 9, characterized in that: The substrate (1) is provided with a plurality of positioning washer connection holes, the positioning washer (16) is provided with via holes corresponding to the positioning washer connection holes, and screws connected to the positioning washer connection holes are provided in the via holes.

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