CN207036441U - Counterweight hanger for pump truck test - Google Patents

Abstract

The utility model provides a kind of counterweight hanger for pump truck test.Counterweight hanger includes body, and body has one group of clamping limb, and the grasping part that clamping limb is formed is sized to adjust, and one end of clamping limb has the suspension part for being used for hanging suspender belt and counterweight.Present application addresses the problem of when carrying out arm support test, accuracy rate is low in the prior art.

Description

Counterweight hanger for pump truck test

Technical field

The technical field of plant equipment is the utility model is related to, in particular to a kind of counterweight for pump truck test Hanger.

Background technology

With the raising of design level and the enhancing of Processing Ability of Manufacturing, the length of pumping vehicle arm rack the more is done the more long.In order to test The performance of product is demonstrate,proved, stability test will be carried out after the completion of trial production.Pump truck stability test, it is to verify whole arm Suffered by frame level during maximum construction load, arm support rotates a circle, the size of the cylinder pedestal road clearance of supporting leg before and after pump truck, with Weigh whether whole vehicle stability meets design requirement.

Conventional test method is in stability test, and the weights of hanging of every joint arm frame are directly hung over suspender belt On arm support.One end of suspender belt is typically tied to form a snare on arm support.For the pump truck of long arm support, arm support is longer, For arm support because of deadweight, it is bigger that end naturally droops deformation, and counterweight easily moves during experiment rotation, causes position to be forbidden, experiment is inadequate Accurately.

Utility model content

Main purpose of the present utility model is to provide a kind of counterweight hanger for pump truck test, to solve prior art In the problem of when carrying out arm support test, accuracy rate is low.

To achieve these goals, the utility model provides a kind of counterweight hanger for pump truck test, including body, Body has one group of clamping limb, and the grasping part that one group of clamping limb is formed is sized to adjust, one end tool of one group of clamping limb There is the suspension part for hanging suspender belt and counterweight.

Further, body also includes fastening assembly, and one group of clamping limb includes：First clamping limb, the second clamping limb, first The position of clamping limb and the second clamping limb can be adjusted, and the first clamping limb is fixed by fastening assembly and the second clamping limb.

Further, body also includes guide frame, and the first end of the first end of the first clamping limb and the second clamping limb is equal In guide frame.

Further, guide frame is slideway, and chute, the first end of the first clamping limb and the second clamping are provided with slideway The first end of arm is slidably disposed in chute.

Further, the first clamping limb has the first connection lug, and the second clamping limb has the second connection lug, fastening group Part includes：Anchorage bar, anchorage bar connect lug through the first connection lug and second；Fastener, fastener will fasten rod lock On the first connection lug and the second connection lug.

Further, the first connection lug and the second connection lug have the connecting hole or link slot passed through for anchorage bar.

Further, the first clamping limb and the second clamping limb have the gripping section to grasping part contract.

Further, the second end of the first clamping limb and the second clamping limb is to the direction bending away from grasping part, and hangs Extension portion is arranged on the second end of the first clamping limb and the second clamping limb.

Further, counterweight hanger also includes angle adjusting mechanism, angle adjusting mechanism be arranged on the first clamping limb and/or On second clamping limb, and angle adjusting mechanism stretches out towards grasping part.

Further, angle adjusting mechanism includes：The adjustable column being arranged on the first clamping limb and/or the second clamping limb； Pressing plate, pressing plate adjustable angle saves land to be connected with adjustable column.

Further, the mounting hole for installation and adjustment post, regulation are provided with the first clamping limb and/or the second clamping limb Post is pivotally disposed in mounting hole.

Further, angle adjusting mechanism also includes：Locating part, adjustable column away from one end of grasping part by mounting hole It is connected after inside passing with locating part；Return unit, return unit be arranged between pressing plate and the first clamping limb and/or be arranged on pressing plate with Between second clamping limb.

Further, adjustable column has limiting plate, and return unit is connected between limiting plate and the first clamping limb and/or set Between limiting plate plate and the second clamping limb.

Further, one end towards pressing plate of adjustable column is provided with the first pin-and-hole, and pressing plate includes：Plate body；It is at least one 3rd connection lug, the 3rd connection lug have the second pin-and-hole；Bearing pin, bearing pin through the first pin-and-hole and the second pin-and-hole by pressing plate with Adjustable column connects.

Using the technical solution of the utility model, counterweight hanger, including body, body have one group of clamping limb, one group of folder The grasping part that gripping arm is formed is sized to adjust, and one end of one group of clamping limb has the suspension for being used for hanging suspender belt and counterweight Portion.

Using said structure counterweight hanger when, staff need by the body of counterweight hanger be arranged on arm support on.When When body is multiple, it can be arranged at intervals successively along the length direction of arm support.Because the clamping that the clamping limb of body is formed is empty Between can adjust, thus the counterweight hanger property of can adapt to adjust the size being adapted to the width with arm support, and reliably press from both sides Hold on arm support.So, when carrying out arm support test, counterweight hanger will not move relative to arm support so that be suspended on counterweight extension Suspender belt and counterweight on frame can be tested reliably, to obtain accurate test result.

Meanwhile the utility model uses new counterweight hanger, it can directly clamp, be accurately positioned with arm support, it is time saving and energy saving, this Sample can make stability test accurate, embody design performance.

Brief description of the drawings

The Figure of description for forming the part of the application is used for providing further understanding to of the present utility model, this practicality New schematic description and description is used to explain the utility model, does not form to improper restriction of the present utility model. In the accompanying drawings：

Fig. 1 shows the connection relationship diagram of the counterweight hanger and suspender belt and counterweight in the utility model；

Fig. 2 shows the structural representation of the counterweight hanger in Fig. 1；

Fig. 3 shows the first clamping limb in Fig. 2, the decomposition texture schematic diagram of the second clamping limb；

Fig. 4 shows the structural representation of the guide frame in Fig. 2；

Fig. 5 shows the structural representation of the adjustable column in Fig. 2；

Fig. 6 shows the structural representation of the pressing plate in Fig. 2.

Wherein, above-mentioned accompanying drawing marks including the following drawings：

10th, body；11st, grasping part；12nd, suspension part；13rd, fastening assembly；131st, anchorage bar；132nd, fastener；14th, One clamping limb；141st, the first connection lug；15th, the second clamping limb；151st, the second connection lug；16th, guide frame；161st, it is sliding Groove；17th, link slot；18th, mounting hole；20th, suspender belt；30th, counterweight；40th, angle adjusting mechanism；41st, adjustable column；411st, limiting plate； 412nd, the first pin-and-hole；42nd, pressing plate；421st, plate body；422nd, the 3rd connection lug；423rd, the second pin-and-hole；43rd, locating part；44th, reset Part；50th, arm support.

Embodiment

It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase Mutually combination.Describe the utility model in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

It is pointed out that unless otherwise specified, all technologies used in this application and scientific terminology has and the application The identical meanings that person of an ordinary skill in the technical field is generally understood that.

In the utility model, in the case where not making opposite explanation, the noun of locality such as " upper and lower, top, bottom " used is generally Be for direction shown in the drawings, or for part in itself on vertical, vertical or gravity direction for；Together Sample, for ease of understanding and describing, " inside and outside " refers to the inside and outside of the profile relative to each part in itself, but the above-mentioned noun of locality is simultaneously It is not used in limitation the utility model.

In order to solve the problems, such as that the accuracy rate of the prior art when carrying out arm support test is low, the utility model provides one Kind is used for the counterweight hanger of pump truck test.

Embodiment one

As depicted in figs. 1 and 2, counterweight hanger includes body 10, and body 10 has one group of clamping limb, is made up of clamping limb Grasping part 11 is sized to adjust, and one end of clamping limb has the suspension part 12 for being used for hanging suspender belt 20 and counterweight 30.

Using said structure counterweight hanger when, staff needs the body 10 of counterweight hanger being arranged on arm support 50 On.When body 10 is multiple, can be arranged at intervals successively along the length direction of arm support 50.Due to the clamping limb structure of body 10 Into grasping part 11 can adjust, thus the counterweight hanger property of can adapt to adjust the chi being adapted to the width with arm support 50 It is very little, and be reliably clamped on arm support 50.So, when carrying out the test of arm support 50, counterweight hanger will not move relative to arm support 50 It is dynamic so that the suspender belt 20 and counterweight 30 being suspended on counterweight hanger can be tested reliably, to obtain accurately test knot Fruit.

As shown in Figures 2 and 3, body 10 also includes fastening assembly 13, and one group of clamping limb includes the first clamping limb 14 and the Two clamping limbs 15.Wherein, the first clamping limb 14 is fixed by fastening assembly 13 and the second clamping limb 15.First clamping limb 14 and The position of two clamping limbs 15 can be adjusted.

Specifically, one group of clamping limb is arranged to 15 two parts of the first clamping limb 14 and the second clamping limb, when in use, Two parts docking coordinates, and inwardly clamps arm support 50.Change the first clamping limb 14 and the second clamping limb by adjusting fastening assembly 13 15 position, and then change the size of middle grasping part 11, to adapt to the width size of arm support 50, when fastening assembly 13 can not When further adjusting, show that counterweight hanger is fixed and complete, so as to ensure that body 10 can clamp arm support 50, prevent from testing When, body 10 slides with respect to arm support 50, influences the accuracy of test.

In order to support one group of clamping limb, body 10 also includes guide frame 16, the first end of the first clamping limb 14 and The first end of second clamping limb 15 is respectively positioned in guide frame 16.It refer to Fig. 2.

Specifically, guide frame 16 is arranged on the top of body 10, one end of the first clamping limb 14 and the second clamping limb 15 One end be arranged on the inside of guide frame 16, the first clamping limb 14 and the second clamping limb 15 can be relative in guide frame 16 Slide, by the relative size for sliding change grasping part 11, guide frame 16 limits the moving direction of one group of clamping limb, made Line slip can only be entered along the direction that guide frame 16 limits by obtaining one group of clamping limb, it is ensured that the relative position of one group of clamping limb Accuracy.Simultaneously as one group of clamping limb is in the inside of guide frame 16, therefore guide frame 16 is can also be to one group of clamping limb Play certain supporting role.

As shown in figure 4, specifically, guide frame 16 is slideway, chute 161, the first clamping limb 14 are provided with slideway First end and the first end of the second clamping limb 15 be slidably disposed in chute 161.

Specifically, being directed to structure 16 is arranged to slideway, the upper opening of slideway is simultaneously provided with chute 161.The knot of slideway Structure is relatively easy, and the workflow of technical staff is reduced in manufacture and use.Chute 161 is shaped as and one group of clamping limb phase The rectangle of cooperation, chute 161 further define the direction of motion of one group of clamping limb, make one group of clamping limb can only relative or phase To motion, the problems such as avoiding generation dislocation, tilt, chute 161 is pressed in the top of one group of clamping limb, has support to make to body 10 With.Certainly, chute 161 can also be V-groove etc..

In the specific embodiment shown in Fig. 2 and Fig. 3, the first clamping limb 14 has the first connection lug 141, the second clamping Arm 15 has the second connection lug 151, and fastening assembly 13 includes anchorage bar 131 and fastener 132, and anchorage bar 131 passes through first Connect lug 141 and second and connect lug 151, anchorage bar 131 is locked in the first connection lug 141 and second by fastener 132 Connect on lug 151.

Specifically, the first clamping limb 14 and the second clamping limb 15 are respectively arranged with the first connection lug 141 and the second connection Lug 151, for connecting fastening assembly 13, the anchorage bar 131 of fastening assembly 13 connects through the first connection lug 141 and second After lug 151, locked by fastener 132.Anchorage bar 131 is arranged to screw thread stock, and fastener 132 is arranged to locking screw Mother, by adjusting locking nut, change screw thread stock and connect the length between lug 151 in the first connection lug 141 and second, So as to change the size of grasping part 11, so that one group of clamping limb compresses the side plate of arm support 50, after adjustment, locking screw is locked Mother fixes the position of one group of clamping limb.So, it can both meet the requirement for adjusting grasping part 11, clamping limb phase can be ensured again The position of arm support 50 is fixed.

Alternatively, the first connection lug 141 and second connect lug 151 have the connecting hole that passes through for anchorage bar 131 or Link slot 17.

Specifically, in the specific embodiment shown in Fig. 3, connecting hole, anchorage bar 131 are provided with the first clamping limb 14 Through connecting hole and it is fixed in connecting hole, the situation for preventing anchorage bar 131 from falling off in use.Second clamping limb Link slot 17 is provided with 15, link slot 17 is arranged to U-type groove, and the cooperation relatively convenient of U-type groove, the accuracy requirement of processing is not Height, it is easy to use.

As shown in figure 3, the second end of the first clamping limb 14 and the second clamping limb 15 is rolled over to away from the direction of grasping part 11 It is curved, and suspension part 12 is arranged on the second end of the first clamping limb 14 and the second clamping limb 15.

Specifically, suspender belt 20 and counterweight 30 are hung for the ease of staff, in the first clamping limb 14 and the second clamping limb 15 bottom end is provided with the bending section away from the direction of grasping part 11, and bending section is used to hang suspender belt as suspension part 12 20 and counterweight 30.

Alternatively, for the ease of connecting suspender belt 20, suppending hole can be set on suspension part 12.

As shown in Fig. 2 in order to better adapt to the structure of different arm supports 50, counterweight hanger also includes angular adjustment machine Structure 40, angle adjusting mechanism 40 is arranged on the first clamping limb 14 and/or the second clamping limb 15, and the direction of angle adjusting mechanism 40 Grasping part 11 stretches out.

Specifically, the two sides of the arm support 50 in view of being tested may not be vertical plane, therefore clamping Angle adjusting mechanism 40 is provided with arm, and angle adjusting mechanism 40 stretches out towards grasping part 11, to auxiliary clamp arm support 50, improve the usable range of counterweight hanger.

In order to reliably clamp arm support 50, while other knots may be avoided in view of the upper part of grasping part 11 The situation of structure, the first clamping limb 14 and the second clamping limb 15 have the gripping section to the contract of grasping part 11.Specifically, angle Degree governor motion 40 is arranged on gripping section.

As shown in Figure 2 and Figure 5, angle adjusting mechanism 40 includes pressing plate 42 and is arranged on the first clamping limb 14 and/or second Adjustable column 41 on clamping limb 15, the adjustable angle of pressing plate 42 saves land to be connected with adjustable column 41.

Specifically, angle adjusting mechanism 40 is made up of pressing plate 42 and adjustable column 41, pressing plate 42 is brought into close contact with arm support 50, is used With auxiliary clamp arm support 50.The distance stretched into by adjusting adjustable column 41 in grasping part 11, thus it is possible to vary pressing plate 42 and arm support 50 distance, pressing plate 42 is set to compress arm support 50.

Alternatively, the mounting hole for installation and adjustment post 41 is provided with the first clamping limb 14 and/or the second clamping limb 15 18, adjustable column 41 is pivotally disposed in mounting hole 18.It should be noted that in order that obtaining pressing plate 42 can have preferably Regulating effect, adjustable column 41 can rotate relative to mounting hole 18, so as to be rotated with dynamic pressure plate 42 also relative to mounting hole 18, with Preferably compression fit is carried out with arm support 50.

In the specific embodiment shown in Fig. 3, mounting hole 18 is provided with the first clamping limb 14 and the second clamping limb 15. Angle adjusting mechanism 40 is two, and two angle adjusting mechanisms 40 are separately mounted in mounting hole 18.

As shown in Figure 2 and Figure 5, angle adjusting mechanism 40 also includes locating part 43 and return unit 44, and adjustable column 41 deviates from One end of grasping part 11 after being passed in mounting hole 18 with locating part 43 by being connected；Return unit 44 is arranged on the folder of pressing plate 42 and first Between gripping arm 14 and/or it is arranged between the clamping limb 15 of pressing plate 42 and second.

Specifically, locating part 43 is arranged to clamp nut, return unit 44 is arranged to holddown spring, and one end of adjustable column 41 is worn After crossing mounting hole 18, locked using clamp nut.And in the other end of adjustable column 41, use holddown spring connection adjustable column 41. In counterweight hanger in use, holddown spring, which gives the pressing plate 42 that the inside clamping force of adjustable column 41 ensures connection, compresses arm support 50. After use finishes dismounting, adjustable column 41 is inwardly resetted in the presence of holddown spring, prepares to use next time.Compress simultaneously Spring is engaged with clamp nut, locks the position of adjustable column 41 so that pressing plate 42 compresses arm support 50.

In the specific embodiment shown in Fig. 5, adjustable column 41 has limiting plate 411, and return unit 44 is connected to limiting plate 411 Between the first clamping limb 14 and/or it is arranged between the plate of limiting plate 411 and the second clamping limb 15.

Specifically, in order to ensure the reliability of return unit 44, limiting plate 411 is provided with adjustable column 41, for limiting The relative position of return unit 44 so that return unit 44 acts on adjustable column 41 all the time, ensures the reset of adjustable column 41.

As shown in Figure 5 and Figure 6, in order that angle adjusting mechanism 40 freely rotates, adjustable column 41 towards the one of pressing plate 42 End is provided with the first pin-and-hole 412, and pressing plate 42 includes plate body 421, bearing pin and at least one 3rd connection lug 422, the 3rd connection Lug 422 has the second pin-and-hole 423, and bearing pin connects pressing plate 42 and adjustable column 41 through the first pin-and-hole 412 and the second pin-and-hole 423 Connect.

By setting bearing pin to ensure the connection reliability of adjustable column 41 and pressing plate 42, meanwhile, pressing plate 42 can be relative Rotated a certain angle in adjustable column 41, ensure that pressing plate 42 compresses the side plate of arm support 50.Certainly, adjustable column 41 and pressing plate 42 also may be used To be arranged to the connected mode of ball-joint.

Counterweight hanger body 10 of the present utility model is made up of the first clamping limb 14 and the second clamping limb 15, at the top of clamping limb It is provided with the guide frame 16 for limiting relative position and anchorage bar 131 and fastener 132, Neng Goufang for being locked Just the size of grasping part 11 is adjusted exactly.The bottom of first clamping limb 14 and the second clamping limb 15 is provided with mounting hole 18, Adjustable column 41 passes through mounting hole 18, and one end of adjustable column 41 is provided with pressing plate 42, and pressing plate 42 can rotate one with relative adjustment post 41 Fixed angle, ensure that pressing plate 42 is brought into close contact with the side of arm support 50, the other end of adjustable column 41 sets finite place piece 43 and resetted Part 44, the two is engaged the fixation that can ensure the position of pressing plate 42.The suspension part 12 that bottom is bent outwardly, can conveniently work people Member's suspension counterweight 30.

Embodiment two

Difference with embodiment one is that the concrete structure of fastening assembly 13 is different from embodiment one.

Specifically, in the tip position of the first clamping limb 14 and the second clamping limb 15 along perpendicular with the axial direction of arm support 50 Direction multiple spacing holes are set.In use, the relative position of the first clamping limb 14 of adjustment and the second clamping limb 15, makes its clamping Arm support 50, the spacing hole of the first clamping limb 14 and the spacing hole of the second clamping limb 15 are then sequentially passed through with pin, by first The clamping limb 15 of clamping limb 14 and second locks.

Embodiment three

Difference with embodiment one is that the structure of body 10 is different.

Specifically, body 10 is not made up of the first clamping limb 14 and the second clamping limb 15.But integrative-structure, Body 10 is in reverse U shape, and the structure of body 10 has certain deformability and elasticity, is exerted a force, can adjusted by outside The size of grasping part 11, so that body 10 can be reliably mounted on arm support 50.

As can be seen from the above description, the utility model the above embodiments realize following technique effect：

Counterweight easily moves when the 1st, efficiently solving arm support experiment of the prior art, causes result of the test is accurately low to ask Topic.

2nd, counterweight hanger can stretch, and can also adjust spacing and angle, and adaptability is extensive.

3rd, it is easy to use, accommodate reliable and stable.

Obviously, above-mentioned described embodiment is only the embodiment of the utility model part, rather than whole realities Apply example.Based on the embodiment in the utility model, those of ordinary skill in the art institute under the premise of creative work is not made The every other embodiment obtained, it should all belong to the scope of the utility model protection.

It should be noted that term used herein above is merely to describe embodiment, and be not intended to restricted root According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative It is also intended to include plural form, additionally, it should be understood that, when in this manual using term "comprising" and/or " bag Include " when, it indicates existing characteristics, step, work, device, component and/or combinations thereof.

It should be noted that term " first " in the description and claims of this application and above-mentioned accompanying drawing, " Two " etc. be for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that so use Data can exchange in the appropriate case, so that presently filed embodiment described herein can be with except illustrating herein Or the order beyond those of description is implemented.

Preferred embodiment of the present utility model is the foregoing is only, is not limited to the utility model, for this For the technical staff in field, the utility model can have various modifications and variations.It is all in the spirit and principles of the utility model Within, any modification, equivalent substitution and improvements made etc., it should be included within the scope of protection of the utility model.

Claims (14)

1. a kind of counterweight hanger for pump truck test, it is characterised in that including body (10), the body (10) has one group Clamping limb, the grasping part (11) that one group of clamping limb is formed are sized to adjust, one end tool of one group of clamping limb There is the suspension part (12) for hanging suspender belt (20) and counterweight (30).

2. counterweight hanger according to claim 1, it is characterised in that the body (10) also includes fastening assembly (13), One group of clamping limb includes：

First clamping limb (14)；

Second clamping limb (15), the position of first clamping limb (14) and second clamping limb (15) can be adjusted, described First clamping limb (14) is fixed by the fastening assembly (13) and second clamping limb (15).

3. counterweight hanger according to claim 2, it is characterised in that the body (10) also includes guide frame (16), The first end of first clamping limb (14) and the first end of second clamping limb (15) are respectively positioned on the guide frame (16) It is interior.

4. counterweight hanger according to claim 3, it is characterised in that the guide frame (16) is slideway, the slideway Inside it is provided with chute (161), the first end of first clamping limb (14) and the first end of second clamping limb (15) It is slidably arranged in the chute (161).

5. counterweight hanger according to claim 2, it is characterised in that first clamping limb (14) has the first connection convex Ear (141), second clamping limb (15) have the second connection lug (151), and the fastening assembly (13) includes：

Anchorage bar (131), the anchorage bar (131) connect lug through the described first connection lug (141) and described second (151)；

The anchorage bar (131) is locked in the first connection lug (141) and described by fastener (132), the fastener (132) On second connection lug (151).

6. counterweight hanger according to claim 5, it is characterised in that the first connection lug (141) and described second Connection lug (151) has the connecting hole or link slot (17) passed through for the anchorage bar (131).

7. counterweight hanger according to claim 2, it is characterised in that first clamping limb (14) and second clamping Arm (15) has the gripping section to the grasping part (11) contract.

8. counterweight hanger according to claim 2, it is characterised in that first clamping limb (14) and second clamping Second end of arm (15) is to the direction bending away from the grasping part (11), and the suspension part (12) are arranged on described first Second end of clamping limb (14) and second clamping limb (15).

9. counterweight hanger according to claim 2, it is characterised in that the counterweight hanger also includes angle adjusting mechanism (40), the angle adjusting mechanism (40) is arranged on first clamping limb (14) and/or second clamping limb (15), and The angle adjusting mechanism (40) is stretched out towards the grasping part (11).

10. counterweight hanger according to claim 9, it is characterised in that the angle adjusting mechanism (40) includes：

The adjustable column (41) being arranged on first clamping limb (14) and/or second clamping limb (15)；

Pressing plate (42), pressing plate (42) adjustable angle saves land to be connected with the adjustable column (41).

11. counterweight hanger according to claim 10, it is characterised in that first clamping limb (14) and/or described The mounting hole (18) for installing the adjustable column (41) is provided with two clamping limbs (15), the adjustable column (41) is pivotly It is arranged in the mounting hole (18).

12. counterweight hanger according to claim 11, it is characterised in that the angle adjusting mechanism (40) also includes：

Locating part (43), the adjustable column (41) are worn away from one end of the grasping part (11) by the mounting hole (18) is interior It is connected after going out with the locating part (43)；

Return unit (44), the return unit (44) be arranged between the pressing plate (42) and first clamping limb (14) and/or It is arranged between the pressing plate (42) and second clamping limb (15).

13. counterweight hanger according to claim 12, it is characterised in that the adjustable column (41) has limiting plate (411), The return unit (44) is connected between the limiting plate (411) and first clamping limb (14) and/or is arranged on the limit Between position plate (411) plate and second clamping limb (15).

14. counterweight hanger according to claim 10, it is characterised in that the direction pressing plate of the adjustable column (41) (42) one end is provided with the first pin-and-hole (412), and the pressing plate (42) includes：

Plate body (421)；

At least one 3rd connection lug (422), the 3rd connection lug (422) have the second pin-and-hole (423)；

Bearing pin, the bearing pin through first pin-and-hole (412) and second pin-and-hole (423) by the pressing plate (42) with it is described Adjustable column (41) connects.