CN206291852U - A kind of detection means of the stack pallet of leaf spring spray-painting production line - Google Patents

Abstract

The utility model is related to auto parts and components field, more particularly to a kind of detection means of the stack pallet of leaf spring spray-painting production line includes the first detection components, the second detection components and the 3rd detection components, first detection components and the second detection components include interval opposition and the first infrared detector and the first reflecting plate that are vertically arranged, and the 3rd detection components include second infrared detector and the second reflecting plate of interval opposition and tilting setting.Whether the utility model is by the first detection components and the position for advancing to left and right two ends of the second component detection stack pallet, detect whether stack pallet advances to the position of front end by the 3rd detection components, stack pallet is controlled to be continuously traveling by the triggering of detection means, and then realize that automation is advanced, increase its production efficiency, it is to avoid the waste of human resources.

Description

A kind of detection means of the stack pallet of leaf spring spray-painting production line

Technical field

The utility model is related to auto parts and components field, more particularly to a kind of stack pallet of leaf spring spray-painting production line Detection means.

Background technology

Leaf spring is most traditional flexible member in automobile suspension system, if usually by the alloy bullet of dry plate Length discrepancy Spring steel disc is combined into one group and is similar to equicohesive spring beam.The bullet for functioning primarily as automobile suspension system of leaf spring Property element.Leaf spring includes grasswort, clip, more pieces of resilient steel plate and centre bolt, and grasswort sets the two ends of main leaf steel plate, card Bind round for more pieces of resilient steel plate to be linked together；And centre bolt needs to be fastenedly connected through multi-disc steel plate and is incorporated into one Rise.And also first to spray several all over anti-corrosive primer by multi-coat lacquer after production process on spring steel plate, then black colored paint is sprayed, spray Steel plate after painting is just resistant to surroundings corrosion, the chance that reduction is got rusty.

Existing automatic assembly line, for the advanced positions of its stack pallet, not good detection mode is generally all adopted Advanced positions are manually detected, and stack pallet is triggered by mechanical button and be continuously traveling, this method, inefficiency, and expend Human resources.

Utility model content

The purpose of this utility model is in view of the shortcomings of the prior art, there is provided a kind of leaf spring spray-painting production line send The detection means of truck, the advanced positions of automatic discrimination its stack pallet realize that automation is advanced, and increase its production efficiency, it is to avoid The waste of human resources.

To solve the above problems, the utility model provides following technical scheme：

A kind of detection means of the stack pallet of the detection means of the stack pallet of leaf spring spray-painting production line, including the first inspection Component, the second detection components and the 3rd detection components are surveyed, first detection components and the second detection components include that interval is right The first infrared detector and the first reflecting plate vertical and be vertically arranged, the 3rd detection components include interval opposition and tilting set The second infrared detector and the second reflecting plate put, second infrared detector are provided with the first mounting bracket of long handle, described Second infrared detector is inclined and mounted in the first mounting bracket, and second reflecting plate is provided with the second mounting bracket of short handle, Second reflecting plate is inclined and mounted in the second mounting bracket.

Further, the top for stating the second mounting bracket is hinged and is combined with the second installing plate, and second reflecting plate is fixed On second installing plate.

Further, the sidepiece of the second installing plate is provided with articulated section, and the articulated section is coordinated the by bolt and nut Two installing plates are fixedly mounted in the second mounting bracket,

Further, the top of first mounting bracket is hinged the first installing plate for being combined with sector, and described second is red External detector is fixedly mounted on the first installing plate.

Further, the circle centre position of first installing plate is provided with counterbore, and first installing plate is provided with the heavy of arc Groove, first installing plate is fixed in the first mounting bracket by the cooperation of cross screw bolt and nut.

Beneficial effect：The detection means of the stack pallet of a kind of leaf spring spray-painting production line of the present utility model, by Whether the position for advancing to left and right two ends of one detection components and the second component detection stack pallet, is detected by the 3rd detection components Whether stack pallet advances to the position of front end, controls stack pallet to be continuously traveling by the triggering of detection means, and then realizes automatic Change and advance, increase its production efficiency, it is to avoid the waste of human resources.

Brief description of the drawings：

Fig. 1 is the utility model dimensional structure diagram,

Fig. 2 is the dimensional structure diagram of the utility model transmission device,

Fig. 3 is the decomposition assembling structure schematic diagram of the utility model transmission device,

Fig. 4 is the dimensional structure diagram of the utility model stack pallet,

Fig. 5 is the partial enlarged drawing of the utility model Fig. 4,

Fig. 6 is the dimensional structure diagram of the utility model transporter

Fig. 7 is the partial enlarged drawing one of the utility model Fig. 6,

Fig. 8 is the partial enlarged drawing two of the utility model Fig. 6,

Fig. 9 is the dimensional structure diagram of the utility model rail relayer,

Figure 10 is the detection components dimensional structure diagram of the utility model the 3rd,

Figure 11 is that the detection components of the utility model the 3rd decompose assembling structure schematic diagram.

Description of reference numerals:Feeding track 1, blanking track 2, slope section 1a, stack pallet 3, main support 31, weld part 31a is supported Contact element 32, position-limited rack 33, steel tank 33a, turning rolls 34, transmission device 4, the first transmission device 4a, the second transmission device 4b, the One gear 41, the first power transmission shaft 411, the first axle bed 412, ring flange 413, the first fixed seat 414, second gear 42, second passes Moving axis 421, the second axle bed 422, the second fixed seat 423, reducing motor 43, the 3rd fixed seat 431, driving-chain 44, push pedal 45 is horizontal Beam 46, mounting rail 47, supporting plate 48, pulley 49, transporter 5, track 51, the second positive stop 511, transfer car(buggy) 52, installation portion 521, hook 522, steel wire rope 523, docking track 53, the first positive stop 531, limited impression 532, motor 54 is driven Wheel 55, drags and draws chain 56, dust cover 57, the first transporter 5a, the second transporter 5b, air-cooler 6, detection means 7, the first inspection Component 7a, the first infrared detector 7a1, the first reflecting plate 7a2, the second detection components 7b, the 3rd detection components 7c are surveyed, second is red The installing plate of the mounting bracket of external detector 7c1, the second reflecting plate 7c2, first 7c3, the second mounting bracket 7c4, second 7c5, first Installing plate 7c6.

Specific embodiment

With reference to Figure of description and embodiment, specific embodiment of the utility model is described in further detail：

Referring to figs. 1 to a kind of detection means of the stack pallet of leaf spring spray-painting production line of Figure 11, including feeding track 1st, blanking track 2 and the stack pallet 3 that can be advanced on feeding track 1 and blanking track 2, the feeding track 1 and blanking track 2 The initiating terminal of parallel and interval setting, the feeding track 1 and blanking track 2 is equipped with the transmission dress for driving stack pallet 3 to advance Put 4, be provided between the feeding track 1 and the same side of blanking track 2 make stack pallet 3 feeding track 1 and blanking track 2 it Between reciprocating transporter 5, the leaf spring spray-painting production line be additionally provided with detection stack pallet 3 whether reach its pre-determined bit The detection means 7 put, detection means 7 detects the arrival of stack pallet 3 precalculated position just can operate transporter 5, realize feeding Transhipment of the car 3 between feeding track 1 and blanking track 2.

With the initiating terminal of blanking track 2 in diagonal distribution, the transmission device 4 includes the initiating terminal of the feeding track 1 The first transmission device 4a that the initiating terminal of feeding track 1 is set and the second transmission device 4b for being arranged on the initiating terminal of blanking track 2.

The transporter 5 includes that the first transporter 5a and the second transporter 5b, the first transporter 5a set Put between the initiating terminal of feeding track 1 and the end of blanking track 2, the second transporter 5b set the end of feeding track 1 and Between the initiating terminal of blanking track 2.

The utility model operationally, first, stack pallet 3 is parked in the initial end position of feeding track 1, via artificial side By steel plate block pattern row pattern on stack pallet 3, the first transmission device 4a at subsequent its top promotes stack pallet 3 for formula or mechanical system Advance, stack pallet 3 is carried out the spraying of multiple tracks by manual type or mechanical system in the traveling process of feeding track 1 to steel plate Operation；When stack pallet 3 advances to feeding 1 end of track, by the second transporter 5b by stack pallet 3 from the end of feeding track 1 End is transported to the initiating terminal of blanking track 2, drives stack pallet 3 to be advanced in blanking track 2 finally by the second transmission device 4b, Also to be air-dried in its traveling process, then advance to blanking track 2 begins to the finished product after air-drying by terminal position Unloading, last empty stack pallet 3 is transported on the initiating terminal of feeding track 1 by the first transporter 5a, carries out repeating work Industry.So move in circles, and multiple stack pallets 3 work simultaneously, realize continuous production.(feeding track and blanking rail in accompanying drawing Road for express clearly only illustrate it is a bit of)

The first transmission device 4a is arranged on the inner side of feeding track 1, the second transmission device 4b and sets blanking rail The inner side in road 2, be arranged on that inner side has been set to save space takes up room.

The direct of travel restocking of the blanking track 2 is provided with multiple for air-dried air-cooler 6 (only illustrating in Fig. 1). Air-cooler 6 is used to accelerate air-drying for paint vehicle.

The feeding track 1 and blanking track 2 are double track, and double track is more stablized, and double track is fixed on the ground.

When a stack pallet 3 is transported via transporter 5, second for closelying follow behind stack pallet 3 in order to prevent its after Continue into causing derailing, therefore be equipped with for spacing slope section 1a in the end of the feeding track 1 and blanking track 2.

First gear 41 and second gear 42 that the transmission device 4 is set up in parallel before and after including, the first gear 41 Rear end be provided with drive first gear 41 rotation reducing motor 43, be provided between the first gear 41 and second gear 42 and The driving-chain 44 of both engagements, the push pedal 45 for being provided with multiple equally distributed L-types on the driving-chain 44, the electricity that slows down Machine 43 drives driving-chain 44 to move and then push pedal 45 is abutted with the side of stack pallet 3.Further stack pallet 3 is set to advance, institute Stating transmission device 4 only promotes a stack pallet 3 to move, a movement for stack pallet 3 and then all sending of promoting on whole track Truck 3 is moved.

The first power transmission shaft 411 is provided with the axle center of the first gear 41, first power transmission shaft 411 is provided with two One axle bed 412, first power transmission shaft 411 is socketed on two the first axle beds 412 and is rotatably assorted therewith, and described first The tail end of power transmission shaft 411 is socketed with ring flange 413, the output that the first gear 41 passes through ring flange 413 and reducing motor 43 End flanges are connected.

Second driving shaft 421 is provided with the axle center of the second gear 42, the second driving shaft 421 is provided with two Two axle beds 422, the second driving shaft 421 is socketed on two the second axle beds 422 and is rotatably assorted therewith.The first gear 41 and second gear 42 setting it is essentially identical, different is only that the tail end of the first power transmission shaft 411 of first gear 41 is socketed with Ring flange 413, thus it is more convenient in maintenance and installation.

The transmission device 4 is also including the first fixed seat 414 for frame first gear 41 high, for frame second gear high 42 the second fixed seat 423 and for the frame fixed seat 431 of reducing motor 43 the 3rd high, first fixed seat 414, second is fixed The fixed seat 431 of seat 423 and the 3rd is contour, and described two first axle beds 412 are fixedly mounted in the first fixed seat 414, described Even second axle bed 422 is fixedly mounted in the second fixed seat 423, and the reducing motor 43 is fixedly mounted on the 3rd fixed seat On 431.First fixed seat 414, the second fixed seat 423 and the 3rd fixed seat 431 are used to make driving-chain 44 and stack pallet 31 Side be in a suitable height.

Being set up between the fixed seat 423 of first fixed seat 414 and second has two crossbeams 46, on described two crossbeams 46 The multiple mounting rails 47 being intervally arranged are provided with, the multiple mounting rail 47 is vertical with crossbeam 46 to be set up, and the mounting rail 47 is outside Prominent, the jag of the mounting rail 47 is located at the underface of driving-chain 44, and the jag of the multiple mounting rail 47 is provided with The L-shaped supporting plate 48 in section, the supporting plate 48 is connected with the upper strata contact of driving-chain 44, and supporting plate 48 holds in the palm the upper strata of driving-chain 44 Firmly make its holding level.Supporting plate 48 is used to hold driving-chain 44, prevents driving-chain 44 from hanging and then makes pushing away on driving-chain 44 Plate 45 and the side uncoupling of stack pallet 3, cause stack pallet 3 can not be promoted to move.

Multiple pulleys 49 are evenly distributed with the supporting plate 48, the driving-chain 44 is slidably matched with multiple pulleys 49.It is sliding Wheel 49 is used to reduce the friction of driving-chain 44 and supporting plate 48, increases the service life of driving-chain 44.

Multiple companies that the stack pallet 3 includes the vertical main support 31 of both sides and is arranged between two main supports 31 A car body for hollow-core construction of beam composition is connect, steel plate Jia is located in two supporting constructions of the composition of main support 31, this structure Steel plate is set to be difficult to slide, the vehicle bottom is provided with four rolling, and the outside positioned at described two main supports 31 is equipped with outwards Prominent collision piece 32, the collision piece 32 is arranged on front bottom end and the rear end bottom of main support 31, the collision piece 32 with The push pedal 45 of transmission device 4 is contradicted and coordinated.Collision piece 32 is provided with four altogether, when stack pallet 3 is located at feeding track 1, car body The collision piece 32 on right side coordinates with the first transmission device 4a transmissions for being located at the inner side of feeding track 1, when stack pallet 3 is located at blanking rail During road 2, the collision piece 32 on the left of car body coordinates with the second transmission device 4b transmissions for being located at the inner side of blanking track 2.

It is reverse V-shaped position-limited rack 33 that the main support 31 is provided with section.Because steel plate is curved, and general main support 31 top is plane, therefore steel plate Jia is located on two main supports 31 risk for still having landing, reverse V-shaped position-limited rack 33 its top are line styles, and steel plate Jia is located on two tops of position-limited rack 33 and does not fall off.

Accordingly, position-limited rack 33 is reverse V-shaped, and the top of general main support 31 is plane, in the mounted state, spacing Frame 33 is difficult location and installation, therefore, it is trapezoidal weld part 31a to be provided with section at the top of the main support 31, described spacing Frame 33 is weldingly fixed on four, the top end points of weld part 31a.

The top of the position-limited rack 33 uniformly sets up multiple steel tank 33a, and the steel tank 33a is spacing with steel plate to be matched somebody with somebody Close.Steel tank 33a prevents steel plate slide anteroposterior.

The stack pallet 3 also includes two turning rolls 34 for installing four rolling, and the four rolling is installed two-by-two On two turning rolls 34, the car body is erected on two turning rolls 34 and by being welded and fixed, and the car body is rolled to two The direction of wheel carrier 34 extends laterally.Transmission device 4 is for setting up in a front end for stack pallet 3 and the front end of another stack pallet 3 Between (be can be seen that in Fig. 2), by the transfer trajectory of stack pallet 3, transmission device 4 will be in the feeding on transporter 5 to transporter 5 Car 3 is pushed in feeding track 1 or blanking track 2, and transporter 5 is transverse shifting, therefore car body must be to two The direction of turning rolls 34 extends laterally, and such transporter 5 could avoid transmission device 4 in transverse shifting.And identical, if It is that the distance that car body stretches out falls short of, in the included angle of straight line that transmission device 4 can be constituted between car body and turning rolls 34 Pass through, but transporter 5 still can be stopped by the first fixed seat 414 of transmission device 4, therefore the first fixed seat 414 can be with L-shaped is set, and transporter 5 is passed through from the bottom notch of the first fixed seat 414.

The transporter 5 includes setting two spaced tracks 51, the track 51 and feeding track 1 and blanking Track 2 is vertically set up, and described two tracks 51 are provided with the transfer car(buggy) 52 being slidably matched with it, and the transporter 5 also includes The reciprocating drive device of transfer car(buggy) 52 is driven, the transfer car(buggy) 52 is provided with docking track 53, under working condition, docking rail Road 53 can be docked with feeding track 1 or blanking track 2.When stack pallet 3 advances to feeding 1 end of track, the second transhipment dress Put 5b to be docked with feeding track 1, stack pallet 3 is then continued to press on to transfer car(buggy) 52 by the first transmission dress, with rear drive equipment The transverse shifting of transfer car(buggy) 52 is driven, by stack pallet 3 from the terminal transit of feeding track 1 to the initiating terminal of blanking track 2, second turn After shipping unit 5b is docked with blanking track 2, the stack pallet 3 being located on transfer car(buggy) 52 is pushed to blanking by the second transmission device 4b On track 2, transfer car(buggy) 52 is driven laterally to return with rear drive equipment.Move back and forth successively and realize switching tracks for stack pallet 3, so that real The continuous production of existing production line.

The drive device include be arranged on the one end of track 51 motor 54 and the other end of track 51 it is driven Wheel 55, the motor 54 is provided with driving wheel, is provided with to drag between the driving wheel and driven pulley 55 and draws chain 56, and described dragging is drawn Chain 56 is engaged with driving wheel with driven pulley 55 respectively, and described dragging is drawn one end of chain 56 and be fixedly connected with the side of transfer car(buggy) 52, institute State and drag the other end for drawing chain 56 and be fixedly connected with the opposite side of transfer car(buggy) 52, drive to drag by the rotating of motor 54 and draw chain 56 operate and then pull transfer car(buggy) 52 to move back and forth.

The transporter also includes the ground groove for installing track 51, and the track 51 is embedded in ground groove It is interior, so that docking track 53, feeding track 1 and blanking track 2 are in same level.

The transporter is additionally provided with for preventing from dragging the chain groove for drawing chain 56 and ground friction, is dragged and is drawn the meeting of chain 56 downwards Hang, it is therefore desirable to chain groove is set increasing and drags the service life for drawing chain 56.

The both sides of the transfer car(buggy) 52 are equipped with drags the installation portion 521 for drawing chain 56 for installation, is set on the installation portion 521 Having draw the hole that the chain pin of the end of chain 56 is passed through for dragging, and described dragging is drawn chain 56 and hung on installation portion 521.Will by way of hanging Drag and draw the both sides that chain 56 is fixedly mounted on transfer car(buggy) 52, cross senior general's chain pin and break to prevent from dragging gravitation, the installation portion 521 Both sides are additionally provided with hook 522, and described dragging is drawn chain 56 and be provided with steel wire rope 523, and the steel wire rope 523 draws the circle of chain 56 1 around dragging, The two ends of steel wire rope 523 are separately fixed on hook 522, and will drag gravitation by the dragging of steel wire rope 523 shares to both sides, it is to avoid chain Pin breaks.

The motor 54 and driven pulley 55 are fixedly mounted on the ground, the motor 54 and driven pulley 55 Top is arranged with dust cover 57.

The end of the docking track 53 is provided with the first positive stop 531, and the first positive stop 531 is used to prevent transmission from filling Put 4 and stack pallet 3 pushed away into docking track 53, on the docking track 53 positioned at docking track 53 rear and front end be additionally provided with it is spacing Groove 532, the limited impression 532 matches with the roller of stack pallet 3, and limited impression 532 is used to prevent transfer car(buggy) 52 laterally When mobile, rocking for generation causes it to derail.

The two ends of the track 51 are provided with the second positive stop 511, and the second positive stop 511 is used to prevent transfer car(buggy) 52 from taking off Liftoff rail 51.

The detection means 7 includes being arranged on the first detection components 7a, the second detection components 7b and the at the two ends of track 51 Three detection components 7c, the first detection components 7a and the second detection components 7b include interval opposition and be vertically arranged first Infrared detector 7a1 and the first reflecting plate 7a2, under working condition, the first infrared detector 7a1 and the first reflecting plate 7a2 distinguishes The both sides of the roller of the end of transfer car(buggy) 52 are built up in, the first detection components 7a and the second detection components 7b is used to detect transfer car(buggy) 52 Whether reach the two ends of track 51, definite be in order to detect docking track 53 whether with feeding track 1 or blanking track 2 pairs Connect, the 3rd detection components 7c includes the second infrared detector 7c1 and the second reflecting plate of interval opposition and tilting setting 7c2, under working condition, the second infrared detector 7c1 and the second reflecting plate 7c2 is built up in the end of transfer car(buggy) 52, and positioned at giving 3 one both sides of main support 31 of truck.

The first detection components 7a and the second detection components 7b in working order under, the first infrared detector 7a1 can send out Infrared light is penetrated, infrared light is reflected and then detected by the detection probe of the first infrared detector 7a1 by the first reflecting plate 7a2, this When transfer car(buggy) 52 not in mated condition, anyway if under mated condition, infrared light can be transported the end of car 52 roller blocking, The detection probe of the first infrared detector 7a1 can't detect infrared light.The detection components 7c of identical the 3rd is also a principle.But It is that the 3rd detection components 7c is whether that detection is to detect stack pallet 3 on transfer car(buggy) 52, infrared light is a master for being fed car 3 Support 31 stops.

Because stack pallet 3 needs traverse motion, in order to not stopped by the 3rd detection components 7c during exercise, therefore not Parallel can hang down and set up.The second infrared detector 7c1 is provided with the first mounting bracket 7c3 of long handle, second infrared detection Device 7c1 is inclined and mounted on the first mounting bracket 7c3, and the second reflecting plate 7c2 is provided with the second mounting bracket 7c4 of short handle, The second reflecting plate 7c2 is inclined and mounted on the second mounting bracket 7c4, and the second mounting bracket 7c4 is built up in the two of stack pallet 3 Between individual main support 31, and between the breach of main support 31 and the composition of turning rolls 34, second during 3 transverse shifting of stack pallet Mounting bracket 7c4 is passed through from breach.

The top of the second mounting bracket 7c4 is hinged and is combined with the second installing plate 7c5, the sidepiece of the second installing plate 7c5 Articulated section is provided with, the second installing plate 7c5 is fixedly mounted on the second mounting bracket by the articulated section by bolt and nut cooperation On 7c4, the second reflecting plate 7c2 is fixedly mounted on second installing plate 7c5, the top of the first mounting bracket 7c3 The the first installing plate 7c6 for being combined with sector is hinged, the second infrared detector 7c1 is fixedly mounted on the first installing plate 7c6, The circle centre position of the first installing plate 7c6 is provided with counterbore, and the first installing plate 7c6 is provided with the deep gouge of arc, described first Installing plate 7c6 is fixed on the first mounting bracket 7c3 by the cooperation of cross screw bolt and nut.

Bolt can be unclamped, the angle of inclination of the second infrared detector 7c1 and the second reflecting plate 7c2 is adjusted, is adjusted with this The test position of the 3rd detector, such as, can adjust its angle of inclination, and its test position is adjusted into the end of stack pallet 3 Steel plate, for detecting on stack pallet 3 whether there is material.

The above, is only preferred embodiment of the present utility model, and not technical scope of the present utility model is made Go out any limitation, thus it is every any trickle amendment made to above example according to technical spirit of the present utility model, equivalent Change and modification, still fall within the range of the technical solution of the utility model.

Claims (5)

1. a kind of detection means of the stack pallet of leaf spring spray-painting production line, it is characterised in that：Including the first detection components (7a), the second detection components (7b) and the 3rd detection components (7c), first detection components (7a) and the second detection components (7b) includes interval opposition and the first infrared detector (7a1) and the first reflecting plate (7a2) that are vertically arranged, the 3rd inspection Surveying component (7c) includes second infrared detector (7c1) and the second reflecting plate (7c2) of interval opposition and tilting setting, described the Two infrared detectors (7c1) are provided with first mounting bracket (7c3) of long handle, and second infrared detector (7c1) inclines installs In the first mounting bracket (7c3), second reflecting plate (7c2) is provided with second mounting bracket (7c4) of short handle, described second Reflecting plate (7c2) is inclined and mounted in the second mounting bracket (7c4).

2. the detection means of the stack pallet of a kind of leaf spring spray-painting production line according to claim 1, it is characterised in that： The top for stating the second mounting bracket (7c4) is hinged and is combined with the second installing plate (7c5), the fixed peace of second reflecting plate (7c2) On second installing plate (7c5).

3. the detection means of the stack pallet of a kind of leaf spring spray-painting production line according to claim 2, it is characterised in that： The sidepiece of the second installing plate (7c5) is provided with articulated section, and the articulated section is coordinated the second installing plate (7c5) by bolt with nut It is fixedly mounted in the second mounting bracket (7c4).

4. the detection means of the stack pallet of a kind of leaf spring spray-painting production line according to claim 1, it is characterised in that： The top of first mounting bracket (7c3) is hinged the first installing plate (7c6) for being combined with sector, second infrared detector (7c1) is fixedly mounted on the first installing plate (7c6).

5. the detection means of the stack pallet of a kind of leaf spring spray-painting production line according to claim 4, it is characterised in that： The circle centre position of first installing plate (7c6) is provided with counterbore, and first installing plate (7c6) is provided with the deep gouge of arc, described First installing plate (7c6) is fixed in the first mounting bracket (7c3) by the cooperation of cross screw bolt and nut.