CN208715584U - A kind of waste metal hydraulic press-packing automatic charging device - Google Patents

Abstract

The utility model discloses a kind of waste metal hydraulic press-packing automatic charging devices, including rack and blanking bin, the frame upper end is by being fixedly installed with blanking bin, feed bin lid is rotatably equipped with by first rotating shaft above the blanking bin right end, the oil cylinder left end of uncapping is rotatablely connected by third shaft and feed bin lid, the feed bin covers end by being fixedly installed with branch hinge, branch hinge outside is by being rotatably equipped with steel wire tightrope, steel wire tightrope left end is by being fixedly installed with traction device, by traction device buffer function can be played during to bunker lift, after hopper playback, together with return spring shrinks outer draw bar with interior draw bar, to make steel wire tightrope tighten automatically, avoid the winding of steel wire tightrope；Damping can be carried out by the damping spring installed inside hinged-support, be damaged so as to avoid reaction force to hinged-support, guarantee that automatic charging device being capable of the work of long-time normal table.

Description

A kind of waste metal hydraulic press-packing automatic charging device

Technical field

The utility model belongs to hydraulic press-packing correlative technology field, and in particular to a kind of waste metal hydraulic press-packing from Dynamic feeding device.

Background technique

Waste metal hydraulic press-packing can be used for the recycling of waste and old material, the processing of waste electrical and electronic equipment (including The 3000 tons of waste printed circuit boards and copper-clad plate leftover pieces project, discarded computer product, discarded communication for being related to hazardous waste processing are set Standby, discarded audio-visual products and radio and television equipment, discarded household and similar applications electric equipment products, import can be used as useless the five of raw material Gold and waste plastics processing), lithium battery recovery processing and noble metal recovery processing etc., waste metal hydraulic press-packing work When need to use automatic charging device carry out rapid material-feeding operation.

Existing waste metal hydraulic press-packing automatic charging device technology has the following problems:

1, existing waste metal hydraulic press-packing automatic charging device is fitted without between hopper and haulage cable Special traction device, but be directly fixed together steel wire tightrope with hopper, it is will lead in this way in steel wire tightrope pair The traction fixing seat that hopper can install hopper side during being drawn causes to damage, and will lead to fixing seat damage when serious It ruins, automatic charging device is caused to can not work normally；After the completion of feeding, hopper needs to return to original working condition, does not have Installation traction device will lead to after hopper returns to original state, and steel wire tightrope can not be tightened automatically, cause wirerope-winding, influence The normal work of automatic charging device；

2, existing waste metal hydraulic press-packing automatic charging device is mounted with hinged-support between hopper and support base, So that hopper is rotated relative to support base, but after the completion of hopper automatic charging, needs to return to originally by self gravity Working condition, very big vibration can be generated in a flash in landing, while the reaction force on ground can be transmitted to by hopper Hinged-support, prolonged working in reciprocating mode, will cause hinged-support damage, can not work normally, make hopper in promotion and decline more Add time-consuming and laborious, influences the working efficiency of equipment.

Utility model content

It is above-mentioned to solve the purpose of this utility model is to provide a kind of waste metal hydraulic press-packing automatic charging device It is fitted without special traction device between the hopper and haulage cable proposed in background technique and hinged-support is easy to damage asks Topic.

To achieve the above object, the utility model provides the following technical solutions:

A kind of waste metal hydraulic press-packing automatic charging device, including rack and blanking bin, the frame upper end pass through It is fixedly installed with blanking bin, the blanking bin right end top is rotatably equipped with feed bin lid, the rack right end by first rotating shaft Top is by being fixedly installed with cylinder support, and the cylinder support upper end is by being fixedly installed with the second shaft, and described second turn By being rotatably equipped with oil cylinder of uncapping on the outside of axis, the oil cylinder left end of uncapping is rotatablely connected by third shaft and feed bin lid, institute It states feed bin and covers end by being fixedly installed with branch hinge, by being rotatably equipped with steel wire tightrope, the branch hinge is left in branch hinge outside Side is rotatably connected to wire cylinders by steel wire tightrope, and the wire cylinders outside is described by being fixedly installed with roller support For roller support by being fixedly mounted on frame upper end, steel wire tightrope left end is described to lead by being fixedly installed with traction device Leading-in device left end is by being fixedly installed with fixing seat, and the fixing seat is by being fixedly mounted on the outside of hopper, the traction device Right side is sleeved on the outside of steel wire tightrope by being fixedly installed with limit base, the limit base, passes through hinge below the hopper right end Support and hold-down support are rotatablely connected, and the hold-down support is fixedly mounted on frame upper end.

Preferably, the traction device includes the first fixed plate, outer draw bar, towing pad, interior draw bar, traction seat, the Two fixed plates, bail and return spring, the first fixed plate right end is by being fixedly installed with outer draw bar, the outer traction By being fixedly installed with towing pad on the inside of bar right end, the outer draw bar inside is equipped with interior draw bar by towing pad sliding sleeve, By being fixedly installed with traction seat, the interior draw bar right end is fixed by being fixedly installed with second for the interior draw bar left end Plate, the second fixed plate right end are equipped with back by being fixedly installed with bail, the outer draw bar and interior draw bar outer sheath Position spring, the traction device are fixedly connected by the first fixed plate with hopper, and the traction device passes through bail and steel wire Tightrope is fixedly connected.

Preferably, the hinged-support includes interior rotation axis, rolling bearing, lower support ring, lower groove, lower connecting shaft, upper company Spindle, upper groove, upper support ring and damping spring, the interior rotation axis outer sheath is equipped with rolling bearing, outside the rolling bearing Side is equipped with lower support ring by turning set, and the lower support ring outer end is by being installed by welding with lower groove, inside the lower groove It is set with lower connecting shaft, the lower connecting shaft upper end outer sheath is equipped with upper connecting shaft, and the upper connecting shaft apical lateral is set with By being welded to connect, the lower connecting shaft and upper connecting shaft outer sheath are equipped with for upper groove, the upper groove top and upper support ring Damping spring, the hinged-support are fixedly connected by interior rotation axis with hold-down support, and the hinged-support passes through upper support ring and material Bucket rotation connection.

Preferably, the second shaft and oil cylinder of uncapping of the cylinder support and the installation of cylinder support upper end are mounted on two A and each size structure is identical, the second shaft and oil cylinder of uncapping of the cylinder support and the installation of cylinder support upper end It is symmetrically mounted on frame upper end front and rear sides.

Preferably, there are two the steel wire tightrope and the branch connecting with steel wire tightrope both ends hinge and traction device are respectively mounted And each size structure is identical, the steel wire tightrope is symmetrically mounted on front and rear sides above rack, the symmetrical peace of branch hinge End front and rear sides are covered mounted in feed bin, the traction device is symmetrically mounted on hopper front and rear sides.

Preferably, the wire cylinders that the roller support and the upper end are fixedly mounted be respectively mounted there are two and each Size structure is identical, and the wire cylinders of the roller support and the upper end fixed installation are symmetrically mounted on two before and after frame upper end Side.

Preferably, the feed bin lid can be rotated upwardly and downwardly by first rotating shaft relative to blanking bin, and the feed bin lid is maximum Rotational angle is 90 °.

Preferably, the interior draw bar can be moved left and right relative to outer draw bar, and the diameter of the interior draw bar is less than The diameter of towing pad, the diameter of the traction seat are less than the diameter of outer draw bar but are greater than the diameter of towing pad.

Compared with prior art, the utility model provides a kind of waste metal hydraulic press-packing automatic charging device, tool It is standby following the utility model has the advantages that

1, the utility model is mounted with traction device comprising the first fixed plate, outer draw bar, towing pad, interior draw bar, Traction seat, the second fixed plate, bail and return spring, such benefit are head after steel wire tightrope applies pulling force to hopper First return spring is stretched, outer draw bar is then driven by the traction seat that interior draw bar and interior draw bar left end are arranged thus It drives hopper to rise, buffer function can be played during to bunker lift, avoid steel wire tightrope and hopper is led The traction fixing seat that can be installed to hopper side during drawing causes the case where damaging；After the completion of feeding, hopper is needed Original working condition is returned to, after hopper playback, together with return spring shrinks outer draw bar and interior draw bar, thus It tightens steel wire tightrope automatically, avoids the winding of steel wire tightrope, provide guarantee for the normal work of automatic charging device；

2, the utility model is mounted with to be mounted with hinged-support between hopper and support base comprising interior rotation axis, rotation Bearing, lower support ring, lower groove, lower connecting shaft, upper connecting shaft, upper groove, upper support ring and damping spring, such benefit are After the completion of hopper feeding, by self gravity return, when hopper decline touches ground, ground applies the anti-work of feed hopper Firmly damping can be carried out by the damping spring installed inside hinged-support, be made so as to avoid reaction force to hinged-support At damage, guarantee automatic charging device can the work of long-time normal table, make hopper more time saving province in promotion and decline Power improves the working efficiency of equipment.

Detailed description of the invention

Attached drawing is used to provide a further understanding of the present invention, and constitutes part of specification, practical with this Novel embodiment is used to explain the utility model together, does not constitute limitations of the present invention, in the accompanying drawings:

Fig. 1 be the utility model proposes a kind of waste metal hydraulic press-packing automatic charging device structural schematic diagram；

Fig. 2 be the utility model proposes waste metal hydraulic press-packing automatic charging device feeding process structural representation Figure；

Fig. 3 be the utility model proposes structural schematic diagram traction device；

Fig. 4 be the utility model proposes hinged-support structural schematic diagram；

In figure: 1, rack；2, blanking bin；3, first rotating shaft；4, feed bin lid；5, cylinder support；6, the second shaft；7, it uncaps Oil cylinder；8, third shaft；9, branch is cut with scissors；10, steel wire tightrope；11, wire cylinders；12, roller support；13, traction device；131, One fixed plate；132, outer draw bar；133, towing pad；134, interior draw bar；135, traction seat；136, the second fixed plate；137, Bail；138, return spring；14, fixing seat；15, hopper；16, limit base；17, hinged-support；171, interior rotation axis；172, turn Dynamic bearing；173, lower support ring；174, lower groove；175, lower connecting shaft；176, upper connecting shaft；177, upper groove；178, upper branch Pushing out ring；179, damping spring；18, hold-down support.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

Fig. 1-4 is please referred to, the utility model provides a kind of technical solution:

A kind of waste metal hydraulic press-packing automatic charging device, including rack 1 and blanking bin 2,1 upper end of rack pass through solid Dingan County is equipped with blanking bin 2, passes through first rotating shaft 3 above 2 right end of blanking bin and is rotatably equipped with feed bin lid 4, leads to above 1 right end of rack It crosses and is fixedly installed with cylinder support 5,5 upper end of cylinder support is passed through on the outside of second shaft 6 by being fixedly installed with the second shaft 6 It is rotatably equipped with oil cylinder 7 of uncapping, 7 left end of oil cylinder of uncapping is rotatablely connected by third shaft 8 and feed bin lid 4, and 4 upper end of feed bin lid is logical It crosses and is fixedly installed with branch hinge 9,9 outside of branch hinge passes through 10 turns of steel wire tightrope by being rotatably equipped with steel wire tightrope 10,9 left side of branch hinge Dynamic to be connected with wire cylinders 11, by being fixedly installed with roller support 12, roller support 12 passes through fixation in wire cylinders 11 outside It is mounted on 1 upper end of rack, 10 left end of steel wire tightrope passes through fixation by being fixedly installed with traction device 13,13 left end of traction device Fixing seat 14 is installed, fixing seat 14 passes through on the right side of traction device 13 and is fixedly installed with by being fixedly mounted on 15 outside of hopper Limit base 16, limit base 16 are sleeved on 10 outside of steel wire tightrope, pass through hinged-support 17 and hold-down support 18 below 15 right end of hopper Rotation connection, hold-down support 18 are fixedly mounted on 1 upper end of rack.

Further, traction device 13 include the first fixed plate 131, outer draw bar 132, towing pad 133, interior draw bar 134, Traction seat 135, the second fixed plate 136, bail 137 and return spring 138,131 right end of the first fixed plate pass through fixed installation There is outer draw bar 132, outer 132 right end of draw bar inside passes through inside outer draw bar 132 by being fixedly installed with towing pad 133 133 sliding sleeve of towing pad is equipped with interior draw bar 134, and interior 134 left end of draw bar is by being fixedly installed with traction seat 135, interior traction 134 right end of bar is by being fixedly installed with the second fixed plate 136, and 136 right end of the second fixed plate is by being fixedly installed with bail 137, outer draw bar 132 is equipped with return spring 138 with interior 134 outer sheath of draw bar, and traction device 13 passes through the first fixed plate 131 It is fixedly connected with hopper 15, traction device 13 is fixedly connected by bail 137 with steel wire tightrope 10；By installing traction device 13 can play buffer function during being promoted to hopper 15, avoid the mistake that steel wire tightrope 10 draws hopper 15 The traction fixing seat 14 that Cheng Zhonghui installs 15 side of hopper causes the case where damaging；It can make steel wire after the completion of feeding Tightrope 10 is tightened automatically, avoids the winding of steel wire tightrope 10.

Further, hinged-support 17 includes interior rotation axis 171, rolling bearing 172, lower support ring 173, lower groove 174, lower company Spindle 175, upper connecting shaft 176, upper groove 177, upper support ring 178 and damping spring 179, interior 171 outer sheath of rotation axis are equipped with Rolling bearing 172 is equipped with lower support ring 173 by turning set on the outside of rolling bearing 172, and lower 173 outer end of support ring passes through welding Lower groove 174 is installed, 174 internal sleeve of lower groove is equipped with lower connecting shaft 175, and lower 175 upper end outer sheath of connecting shaft is equipped with upper company Spindle 176, upper 176 apical lateral of connecting shaft are set with upper groove 177, and 177 top of upper groove and upper support ring 178 pass through welding Connection, lower connecting shaft 175 and 176 outer sheath of upper connecting shaft are equipped with damping spring 179, hinged-support 17 by interior rotation axis 171 and Hold-down support 18 is fixedly connected, and hinged-support 17 is rotatablely connected by upper support ring 178 with hopper 15；By installing 17 energy of hinged-support Enough when the decline of hopper 15 touches ground, the reaction force that ground applies feed hopper 15 can be by installing inside hinged-support 17 Damping spring 179 carry out damping, damaged so as to avoid reaction force to hinged-support 17, guarantee automatic charging dress Setting being capable of the work of long-time normal table.

Further, the second shaft 6 and oil cylinder 7 of uncapping of cylinder support 5 and the installation of 5 upper end of cylinder support are mounted on two A and each size structure is identical, the second shaft 6 and oil cylinder 7 of uncapping of cylinder support 5 and the installation of 5 upper end of cylinder support It is symmetrically mounted on 1 upper end front and rear sides of rack；By being symmetrically installed the identical cylinder support 5 of two size structures and uncapping Hopper 15 more convenient effectively can be promoted and be declined by steel wire tightrope 10 by oil cylinder 7.

Further, steel wire tightrope 10 and the branch connecting with 10 both ends of steel wire tightrope hinge 9 and traction device 13 are mounted on Two and each size structure it is identical, steel wire tightrope 10 is symmetrically mounted on 1 top front and rear sides of rack, the symmetrical peace of branch hinge 9 Mounted in 4 upper end front and rear sides of feed bin lid, traction device 13 is symmetrically mounted on 15 front and rear sides of hopper；By being symmetrically installed two bar steels What silk tightrope 10 and two traction devices 13 can be balanced more promotes hopper 15, and hopper 15 is avoided to roll.

Further, the wire cylinders 11 that roller support 12 and the upper end are fixedly mounted be respectively mounted there are two and each Size structure is identical, and the wire cylinders 11 of roller support 12 and the upper end fixed installation are symmetrically mounted on before and after 1 upper end of rack Two sides.

Further, feed bin lid 4 can be rotated upwardly and downwardly by first rotating shaft 3 relative to blanking bin 2,4 maximum rotation of feed bin lid Angle is 90 °；Hopper 15 can be promoted while rotation by the feed bin lid 4 that installation can rotate 90 °, carry out automatic charging Operation.

Further, interior draw bar 134 can be moved left and right relative to outer draw bar 132, and the diameter of interior draw bar 134 is less than The diameter of towing pad 133, the diameter of traction seat 135 are less than the diameter of outer draw bar 132 but are greater than the diameter of towing pad 133； Buffer function can be played when being promoted to hopper 15 relative to moving left and right for outer draw bar 132 by interior draw bar 134, Hopper 15 plays the role of tightening steel wire tightrope 10 when declining.

The working principle and process for using of the utility model: the working principle of the working principle of the utility model is by opening Feed bin lid 4 is rotated up promotion by lid oil cylinder 7, the branch that then feed bin lid 4 is fixedly mounted during rising by the upper end Hinge 9 drives steel wire tightrope 10, then applies pulling force to traction device 13 by steel wire tightrope 10, and traction device 13 is by steel wire tightrope It drives hopper 15 to be rotated up after 10 pulling force applied, stops turning after feed bin lid 4 is rotated upwardly into 90 ° of maximum angle Dynamic, hopper 15 also stops being lifted up at this time, and the waste metal in hopper 15 enters in blanking bin 2, then in oil cylinder 7 of uncapping Under the action of make feed bin lid 4 start to think lower rotation, while hopper 15 rotates down under the effect of gravity, until return knot Beam completes the automatic charging to waste metal；The utility model is coped with before using the utility model does the preceding inspection of necessary use It looks into, after confirmation, puts into waste metal to hopper 15 first, after dispensing, start oil cylinder 7 of uncapping, pass through oil of uncapping Feed bin lid 4 is rotated up promotion by cylinder 7, and then feed bin lid 4 cuts with scissors 9 bands by the branch that the upper end is fixedly mounted during rising Dynamic steel wire tightrope 10, steel wire tightrope 10 apply pulling force to traction device 13 through wire cylinders 11, and traction device 13 is soft by steel wire It drives hopper 15 to be rotated up after the pulling force that rope 10 applies, stops turning after feed bin lid 4 is rotated upwardly into 90 ° of maximum angle Dynamic, hopper 15 also stops being lifted up at this time, and the waste metal in hopper 15 enters in blanking bin 2, then in oil cylinder 7 of uncapping Under the action of make feed bin lid 4 start to rotate down, while hopper 15 rotates down under the effect of gravity, when hopper 15 exists When touching ground, the reaction force that ground applies feed hopper 15 can be by the damping spring 179 installed inside hinged-support 17 Damping is carried out, is damaged so as to avoid reaction force to hinged-support 17, at this point, return spring 138 is by outer draw bar 132 together with the contraction of interior draw bar 134, so that steel wire tightrope 10 be made to tighten automatically, completes the automatic charging to waste metal Operation.

While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.

Claims (8)

1. a kind of waste metal hydraulic press-packing automatic charging device, including rack (1) and blanking bin (2), it is characterised in that: institute Rack (1) upper end is stated by being fixedly installed with blanking bin (2), is rotated above blanking bin (2) right end by first rotating shaft (3) It is equipped with feed bin lid (4), by being fixedly installed with cylinder support (5) above rack (1) right end, the cylinder support (5) Upper end is by being fixedly installed with the second shaft (6), by being rotatably equipped with oil cylinder of uncapping (7), institute on the outside of second shaft (6) It states oil cylinder of uncapping (7) left end to be rotatablely connected by third shaft (8) and feed bin lid (4), feed bin lid (4) upper end passes through fixation Branch hinge (9) is installed, branch hinge (9) outside passes through steel on the left of the branch hinge (9) by being rotatably equipped with steel wire tightrope (10) Silk tightrope (10) is rotatably connected to wire cylinders (11), by being fixedly installed with roller support on the outside of the wire cylinders (11) (12), the roller support (12) passes through fixed peace by being fixedly mounted on rack (1) upper end, steel wire tightrope (10) left end Equipped with traction device (13), traction device (13) left end is by being fixedly installed with fixing seat (14), the fixing seat (14) It is described by being fixedly installed with limit base (16) on the right side of the traction device (13) by being fixedly mounted on the outside of hopper (15) Limit base (16) is sleeved on the outside of steel wire tightrope (10), passes through hinged-support (17) and hold-down support below hopper (15) right end (18) it is rotatablely connected, the hold-down support (18) is fixedly mounted on rack (1) upper end.

2. a kind of waste metal hydraulic press-packing automatic charging device according to claim 1, it is characterised in that: described to lead Leading-in device (13) includes the first fixed plate (131), outer draw bar (132), towing pad (133), interior draw bar (134), traction seat (135), the second fixed plate (136), bail (137) and return spring (138), the first fixed plate (131) right end pass through It is fixedly installed with outer draw bar (132), by being fixedly installed with towing pad (133), institute on the inside of outer draw bar (132) right end It states inside outer draw bar (132) through towing pad (133) sliding sleeve equipped with interior draw bar (134), the interior draw bar (134) is left End is by being fixedly installed with traction seat (135), and interior draw bar (134) right end is by being fixedly installed with the second fixed plate (136), the second fixed plate (136) right end is by being fixedly installed with bail (137), the outer draw bar (132) with it is interior Draw bar (134) outer sheath is equipped with return spring (138), and the traction device (13) passes through the first fixed plate (131) and hopper (15) it is fixedly connected, the traction device (13) is fixedly connected by bail (137) with steel wire tightrope (10).

3. a kind of waste metal hydraulic press-packing automatic charging device according to claim 1, it is characterised in that: the hinge Support (17) includes interior rotation axis (171), rolling bearing (172), lower support ring (173), lower groove (174), lower connecting shaft (175), upper connecting shaft (176), upper groove (177), upper support ring (178) and damping spring (179), the interior rotation axis (171) outer sheath is equipped with rolling bearing (172), and lower support ring is housed by turning set on the outside of the rolling bearing (172) (173), lower support ring (173) outer end is by being installed by welding with lower groove (174), suit inside the lower groove (174) Have lower connecting shaft (175), lower connecting shaft (175) the upper end outer sheath is equipped with upper connecting shaft (176), the upper connecting shaft (176) apical lateral is set with upper groove (177), and upper groove (177) top and upper support ring (178) are connected by welding It connects, the lower connecting shaft (175) and upper connecting shaft (176) outer sheath are equipped with damping spring (179), and the hinged-support (17) passes through Interior rotation axis (171) is fixedly connected with hold-down support (18), and the hinged-support (17) passes through upper support ring (178) and hopper (15) Rotation connection.

4. a kind of waste metal hydraulic press-packing automatic charging device according to claim 1, it is characterised in that: the oil Cylinder support (5) and cylinder support (5) upper end installation the second shaft (6) and oil cylinder of uncapping (7) be respectively mounted there are two and they Respective size structure is identical, the second shaft (6) and oil of uncapping of the cylinder support (5) and the installation of cylinder support (5) upper end Cylinder (7) is symmetrically mounted on rack (1) upper end front and rear sides.

5. a kind of waste metal hydraulic press-packing automatic charging device according to claim 1, it is characterised in that: the steel Silk tightrope (10) and connect with steel wire tightrope (10) both ends branch hinge (9) and traction device (13) be respectively mounted there are two and they Respective size structure is identical, and the steel wire tightrope (10) is symmetrically mounted on front and rear sides above rack (1), and the branch hinge (9) is right Title is mounted on feed bin lid (4) upper end front and rear sides, and the traction device (13) is symmetrically mounted on hopper (15) front and rear sides.

6. a kind of waste metal hydraulic press-packing automatic charging device according to claim 1, it is characterised in that: the rolling There are two the wire cylinders (11) that cylinder support (12) and the upper end are fixedly mounted are respectively mounted and each size structure is identical, The wire cylinders (11) that the roller support (12) and the upper end are fixedly mounted are symmetrically mounted on two before and after rack (1) upper end Side.

7. a kind of waste metal hydraulic press-packing automatic charging device according to claim 1, it is characterised in that: the material Warehouse lid (4) can be rotated upwardly and downwardly by first rotating shaft (3) relative to blanking bin (2), and feed bin lid (4) the maximum rotation angle is 90°。

8. a kind of waste metal hydraulic press-packing automatic charging device according to claim 2, it is characterised in that: in described Draw bar (134) can be moved left and right relative to outer draw bar (132), and the diameter of the interior draw bar (134) is less than towing pad (133) diameter, the diameter of the traction seat (135) are less than the diameter of outer draw bar (132) but are greater than towing pad (133) Diameter.