CN220335784U - Upstream end guardrail - Google Patents

Abstract

The application provides an upstream end guardrail relates to road traffic safety protection field. It comprises the following steps: the guide groove comprises a leading-in section, a bending-out section and a bending section, wherein the leading-in section is sleeved on the starting end of the protective plate, the bending-out section extends towards one side far away from a road, the bending section is connected with the leading-in section and the bending-out section, and the protective plate extending into the leading-in section can deform along the bending section and penetrate out from the bending-out section; the guide end is arranged at the initial end of the protection plate and is connected with the end movable frame; the guide rail unit is connected with the road, and the guide rail unit sets up along the road direction, and the end activity is put up on the guide rail unit and can follow the guide rail unit and remove, and the part of keeping away from the initiating terminal on the guard plate is connected with the bracing piece, and the bracing piece is inserted and is located in the road. The protection plate can be reduced and the risk that the protection plate is pricked into the vehicle body is reduced.

Description

Upstream end guardrail

Technical Field

The application relates to the field of road traffic safety protection, in particular to an upstream end guardrail.

Background

The highway guardrail is a traffic safety facility arranged at the outer side of a road shoulder, a traffic separation belt, pedestrian road teeth and the like, and can prevent vehicles from going out of the road or entering into an opposite lane, so that injuries of collision accidents to passengers can be reduced.

The protection guardrail at the crossing is provided with an end, and the part of the end needs to be provided with a corresponding energy absorption structure to reduce the situation that the end of the protection guardrail is inserted into a vehicle to cause serious injury to drivers and passengers.

The Chinese patent with the bulletin number of CN211285258U discloses a guardrail energy-absorbing end, which comprises a protection plate and a support frame, wherein an energy-absorbing groove is formed in the protection plate, and the protection plate is fixed on the support frame through bolts. When the vehicle bumps the upper reaches end part of guard plate, the guard plate is extruded and moved to make bolt and the energy-absorbing groove of fixed guard plate take place to extrude and shear, and then can realize the absorption of impact energy. However, when the shielding plate is deformed by being pressed, the deformation direction of the shielding plate cannot be controlled. Therefore, when the vehicle hits the end portion of the fender, it still easily occurs that the fender sticks into the vehicle body to cause injury to the driver.

In view of this, it is desirable to provide an upstream end rail.

Disclosure of Invention

In order to reduce the occurrence of injury to occupants caused by penetration of the fender into the interior of the vehicle body, the present application provides an upstream end rail.

The application provides an upstream end guardrail, adopts following technical scheme: an upstream end rail comprising: the guide end is provided with a guide groove, the guide groove comprises an introduction section, a bending section and a bending section, the introduction section is sleeved on the starting end of the guide plate, the bending section extends towards one side far away from a road, the bending section is connected with the introduction section and the bending section, and the guide plate extending into the introduction section can deform along the bending section and penetrate out of the bending section; the guide end is arranged at the starting end of the protection plate and is connected with the end movable frame; the guide rail unit is connected with a road, the guide rail unit is arranged along the direction of the road, the end head is movably erected on the guide rail unit and can move along the guide rail unit, a part, far away from a starting end, of the protection plate is connected with the support rod, and the support rod is inserted into the road.

Through adopting the technical scheme, the end movable frame and the guide rail unit are arranged to enable the guide end to move along the road direction after being collided, so that the protection plate enters the introducing section along with the movement of the guide end and deforms along the bending section, and finally the protection plate penetrates out from the bending section to a direction away from the road, and therefore the protection plate is not easy to prick into the vehicle body after deformation, and the driver and the passengers are injured; the support rod is arranged to enable the protection plate to move towards the direction away from the guide end after being extruded by the guide end, so that the protection plate can deform in the guide end, the deformation energy absorption function is achieved, and the vehicle colliding with the guardrail of the upstream end can be decelerated.

Specifically, the guide end is provided with a collision end, and the collision end is connected with one side of the bent-out section, which is far away from the introducing section.

Through adopting above-mentioned technical scheme, set up the area that the collision end can increase the impact part on the direction end to can make the direction end be difficult for inserting inside the automobile body when the vehicle striking and lead to the driver and passengers to be injured.

Further, a reinforcing plate is arranged between the collision end head and the guide end head, one end of the reinforcing plate is connected with the collision end head, and the other end of the reinforcing plate is connected with the bending section.

By adopting the technical scheme, the reinforcing plate is arranged, so that the collision end is not easily affected by collision to bend, the area of the impacted part on the collision end is not easily reduced, and the collision end is not easily inserted into the vehicle body during collision of the vehicle to cause injury of drivers and passengers; the reinforcing plate is arranged, so that the bending section is not easy to deform due to extrusion of the protection plate, and the protection plate is blocked in the guide end.

Specifically, an energy absorption groove is formed in the protection plate along the road direction, the energy absorption groove comprises a connecting hole, a release hole and an energy absorption strip, the connecting hole is formed in one end, close to the guide end, of the energy absorption groove, the release hole is formed in one end, far away from the guide end, of the energy absorption groove, and the energy absorption strip is arranged in the energy absorption groove and located between the connecting hole and the release hole; the guide rail unit is provided with a supporting movable frame capable of moving along the guide rail unit, the connecting hole is internally provided with a bolt used for being connected with the supporting movable frame or the end movable frame, and the bolt can move from the connecting hole to the releasing hole.

By adopting the technical scheme, the energy absorbing strip is arranged to stop the bolt moving in the energy absorbing groove, so that the energy transferred to the upstream end guardrail by the vehicle impact can be absorbed; the bolt that sets up to deviate from the hole and can make and remove wherein breaks away from with the guard plate for support movable frame or end movable frame with bolted connection can continue to follow the guide rail unit and remove, and drive next support movable frame along the guide rail unit, thereby can realize the absorption of a plurality of energy-absorbing grooves to striking energy, thereby can play the deceleration to the vehicle that collides with this upstream end guardrail.

Further, anti-blocking blocks are arranged between the protection plate and the end movable frame and between the protection plate and the supporting movable frame.

By adopting the technical scheme, the anti-blocking block can deform and absorb energy after being impacted, so that the capability of the protection plate for resisting impact from the road direction is improved.

Specifically, the guide rail unit includes track and supporting seat, the both ends of track all are equipped with the supporting seat, the supporting seat is connected with the road.

Through adopting above-mentioned technical scheme, end movable frame and support movable frame along the track remove in the road direction, and the supporting seat can make track and road connection.

Further, be equipped with a plurality of holes of stepping down and the unit of buckling along its length direction on the track, be close to on the hole of stepping down one side of direction end is equipped with the unit of buckling, the unit of buckling is in the orbital outside is formed with the inclined plane, the inclined plane is from being close to the direction end to keeping away from in the direction of direction end keep away from the track, move through the inclined plane the end movable shelf with the support movable shelf all can with the unit of buckling is pressed into in the hole of stepping down.

By adopting the technical scheme, the bending unit can stop the end movable frame and the supporting movable frame which move on the track, so that the energy transferred to the end guardrail by the vehicle collision can be absorbed; the bending unit can enter the yielding hole when being bent to the direction close to the track, so that the bending unit entering the yielding hole can not generate a blocking effect on the end movable frame and the supporting movable frame which move on the track.

Further, the bending unit comprises a bearing part and a wedge-shaped block, and the bearing part is connected with one side, close to the guide end, of the port of the abdication hole; the wedge block is detachably connected to one surface, opposite to the yielding hole, of the bearing part.

By adopting the technical scheme, the wedge block can be installed after the end movable frame and the supporting movable frame are moved to the preset positions, so that the installation of the end movable frame and the supporting movable frame can be facilitated.

In summary, the present application includes the following beneficial technical effects:

the guide end is internally provided with a guide groove comprising an introduction section, a bending section and a bending section, the bending section extends towards one side far away from the road, the guide rail unit connected with the road is provided with an end movable frame connected with the guide end, so that the guide end moves along the road direction after being collided, the protection plate enters the introduction section along with the movement of the guide end and deforms along the bending section, and finally the protection plate penetrates out from the bending section towards the direction far away from the road, so that the protection plate is not easy to prick into a vehicle body after deformation, and the driver and passengers are injured; the part of keeping away from the initiating terminal on the guard plate is connected with the bracing piece of locating in the road with insert, in order to make the guard plate be difficult for removing to the direction of keeping away from the direction of direction end after receiving the extrusion of direction end, thereby guarantee that the guard plate can take place deformation in the inside of direction end, play deformation energy-absorbing effect, and then can play the deceleration to the vehicle that collides with the end guardrail of upper reaches.

Drawings

Fig. 1 is a perspective view of an upstream end rail of the present application.

Fig. 2 is a rear view of an upstream end rail of the present application.

Fig. 3 is a schematic cross-sectional view taken along section line A-A in fig. 2.

Fig. 4 is a front view of an upstream end rail of the present application.

FIG. 5 is a schematic enlarged partial view of region B of FIG. 4 showing the attachment aperture, the extraction aperture and the energy absorbing strip.

Fig. 6 is a right side view of an upstream end rail of the present application.

Fig. 7 is a schematic cross-sectional view taken along section line C-C in fig. 6.

Fig. 8 is a schematic partial enlarged view of a region D in fig. 7, in which an inclined surface is shown.

Reference numerals: 1. a protection plate; 11. an energy absorption groove; 111. a connection hole; 112. a release hole; 113. an energy absorbing strip; 2. a guide end; 21. a guide groove; 211. an introduction section; 212. bending out the section; 213. bending sections; 22. a collision end; 23. a reinforcing plate; 3. a support rod; 4. an end movable frame; 5. a guide rail unit; 51. a track; 52. a support base; 53. a relief hole; 54. a bending unit; 541. an inclined surface; 542. a receiving part; 543. wedge blocks; 6. supporting the movable frame; 7. a bolt; 8. an anti-blocking block; 9. an I-beam track groove; 91. reinforcing blocks.

Detailed Description

Fig. 1 is a perspective view of an upstream end rail of the present application, and fig. 2 is a rear view of an upstream end rail of the present application. Referring to fig. 1 and 2, an upstream end rail comprising: guard plate 1, direction end 2, bracing piece 3, end adjustable shelf 4 and guide rail unit 5, have laid guide rail unit 5 in road border road direction, guide rail unit 5 includes track 51 and supporting seat 52, track 51's both ends all are equipped with the supporting seat 52 of being connected with the road to can leave the clearance between track 51 and road, thereby can be convenient for the removal of end adjustable shelf 4 on track 51, be equipped with on the guide rail unit 5 can follow the end adjustable shelf 4 of guide rail unit 5 removal, be connected with direction end 2 on the end adjustable shelf 4, be formed with guide slot 21 on the direction end 2.

Fig. 3 is a schematic cross-sectional view taken along section line A-A in fig. 2, and fig. 4 is a front view of an upstream end rail of the present application. Referring to fig. 3 and 4, the guide groove 21 includes a lead-in section 211, a bent-out section 212, and a bent-out section 213, the lead-in section 211 being capable of being sleeved on the start end of the protection plate 1, the bent-out section 212 extending toward a side far from a road, the bent-out section 213 being connected with the lead-in section 211 and the bent-out section 212.

When the vehicle collides with the guide tip 2, the guide tip 2 moves in the road direction, so that the shielding plate 1 enters the introduction section 211 and deforms along the bending section 213 with the movement of the guide tip 2. Specifically, the direction of the curved section 212 can be set to be perpendicular to the road and far away from the direction of the road, so that the protection plate 1 enters the introducing section 211 along with the movement of the guiding end head 2 and deforms along the curved section 213, and finally the protection plate 1 penetrates out from the curved section 212 to be perpendicular to the road and far away from the direction of the road, so that the protection plate 1 is not easy to prick into the vehicle body after deformation, and the driver and passengers are injured.

The part of keeping away from the initiating terminal on the guard plate 1 is connected with bracing piece 3, and in the road was inserted to bracing piece 3 to can make guard plate 1 be difficult for removing to the direction of keeping away from direction end 2 after receiving the striking of vehicle, thereby guarantee that guard plate 1 can take place deformation in the inside of direction end 2, play deformation energy-absorbing effect, and then can play the deceleration to the vehicle that collides with the end guardrail of upper reaches. Specifically, the protection plate 1 can be a three-wave plate with good bending resistance, so that the deceleration action of the upstream end guardrail on a vehicle colliding with the upstream end guardrail can be enhanced.

Referring to fig. 1 and 3, in one embodiment, the guide tip 2 is provided with a collision tip 22, and the collision tip 22 is connected to a side of the bent-out section 212 away from the introduction section 211, so that the area of the impacted portion of the guide tip 2 can be increased, and thus the guide tip 2 is not easy to be inserted into the vehicle body to cause injury to a driver and passengers when impacting with the vehicle. In particular, a cushion rubber may be provided on the side of the impact head 22 remote from the bent-out section 212.

Referring to fig. 1 and 3, in one embodiment, a reinforcing plate 23 may be disposed between the collision end 22 and the guide end 2, one end of the reinforcing plate 23 is connected to the collision end 22, and the other end of the reinforcing plate 23 is connected to the bending section 213, so that the collision end 22 is not easily bent under the impact, so that the area of the impacted portion of the collision end 22 is not easily reduced, and the collision end 22 is not easily inserted into the vehicle body to cause injury to a driver and passengers when the collision end 22 collides with the vehicle; the reinforcing plate 23 is also arranged to enable the bending section 213 not to be easily extruded by the protection plate 1 to deform, so that the situation that the protection plate 1 is blocked inside the guide end head 2 occurs.

Fig. 5 is a schematic partial enlarged view of the region B in fig. 4, in which the connection hole, the escape hole and the energy absorbing strip are shown, and referring to fig. 4 and 5, in one embodiment, the head movable frame 4 is provided at the start end of the rail unit 5 (i.e., at the end of the rail 51 near the start end of the shielding plate 1), and a plurality of support movable frames 6 movable along the rail 51 are further provided between the support seats 52 at both ends of the rail 51; a plurality of energy-absorbing grooves 11 are formed in the protection plate 1 along the road direction, each energy-absorbing groove 11 comprises a connecting hole 111, a release hole 112 and an energy-absorbing strip 113, each connecting hole 111 is formed in one end, close to the guide end head 2, of each energy-absorbing groove 11, each release hole 112 is formed in one end, far away from the guide end head 2, of each energy-absorbing groove 11, bolts 7 used for being connected with the corresponding support movable frame 6 or the corresponding end movable frame 4 are arranged in each connecting hole 111, the bolts 7 can move from the corresponding connecting holes 111 to the corresponding release holes 112, and each energy-absorbing strip 113 is arranged in each energy-absorbing groove 11 and located between the corresponding connecting hole 111 and each release hole 112.

It will be appreciated that a vehicle impact will cause the head turret 4 to slide from the start end of the rail unit 5 to the support turret 6 nearest to the head turret 4, and when the head turret 4 abuts against the support turret 6, the head turret 4 will move with the support turret 6 and the bolts 7 attached thereto, so that the bolts 7 provided at the attachment holes 111 will move along the energy absorbing grooves 11 to the release holes 112. During the movement of the bolt 7, the bolt 7 breaks the energy absorbing strip 113 which plays a role in stopping the bolt, so that the energy absorbing strip 113 can absorb energy transferred to the upstream end guardrail by the collision of the vehicle, and the vehicle colliding with the upstream end guardrail can be decelerated.

Specifically, the diameter of the release hole 112 needs to be larger than the diameter of the nut on the bolt 7, so that the bolt 7 moved into the release hole 112 is pulled by the support movable frame 6 or the end movable frame 4 connected with the bolt 7 to be separated from the protection plate 1, thereby enabling the support movable frame 6 and the end movable frame 4 to continue to move along the guide rail unit 5 and driving the next support movable frame 6 and the bolt 7 connected thereto to move. Specifically, a plurality of bolts 7 can be installed on the same movable support 6 or movable end support 4 at the same time, and energy absorbing grooves 11 matched with the bolts 7 are formed in the protection plate 1, so that energy transmitted to the movable end support 4 and the movable support 6 by vehicle impact can be absorbed by the plurality of energy absorbing grooves 11 at the same time, and further the decelerating effect of the upstream end guardrail on vehicles colliding with the upstream end guardrail can be enhanced.

Referring to fig. 3, in one embodiment, anti-blocking blocks 8 are disposed between the protection plate 1 and the end movable frame 4 and between the protection plate 1 and the support movable frame 6, and the anti-blocking blocks 8 can deform and absorb energy after being collided, so that the capability of the protection plate 1 for resisting impact from the road direction is improved.

Referring to fig. 1 and 4, in one embodiment, the rail unit 5 includes a rail 51 and a support base 52, and in particular, the rail 51 may be an i-beam or a circular tube, and rail grooves matching with the rail 51 may be formed at bottom ends of the head movable frame 4 and the support movable frame 6, so that the guide head 2 connected to the head movable frame 4 can move in the road direction after being collided.

Fig. 6 is a right side view of an upstream end rail of the present application, and fig. 7 is a schematic cross-sectional view taken along section line C-C in fig. 6. Referring to fig. 6 and 7, in one embodiment, the rail 51 is provided with a plurality of relief holes 53 and bending units 54 along the length direction thereof, and a bending unit 54 is provided on one side of the relief hole 53 near the guide tip 2. Fig. 8 is a schematic partial enlarged view of a region D in fig. 7, in which an inclined surface is shown. Referring to fig. 7 and 8, the bending unit 54 is formed with an inclined surface 541 at the outside of the rail 51, the inclined surface 541 gradually gets away from the rail 51 from the direction approaching the guide tip 2 to the direction away from the guide tip 2, the bending unit 54 can stop the tip movable frame 4 and the support movable frame 6 moving on the rail 51, and both the tip movable frame 4 and the support movable frame 6 moving past the inclined surface 541 can press-bend the bending unit 54 into the relief hole 53, so that energy transmitted to the tip movable frame 4 and the support movable frame 6 by an impacting vehicle is absorbed by the bending unit 54, and further, the deceleration effect of the present upstream tip guard rail on the vehicle colliding therewith can be enhanced; when bent in a direction approaching the rail 51, the bending unit 54 can enter the relief hole 53, so that the head movable frame 4 and the support movable frame 6 can continue to move on the rail 51.

Specifically, referring to fig. 1 and 5, the rail 51 may be an i-beam, the bottom ends of the end movable frame 4 and the support movable frame 6 may be provided with an i-beam rail groove 9 adapted to be sleeved on the rail 51 (i.e., the i-beam), the yielding hole 53 may be provided on the top surface of the rail 51, and the size of the cross section of the i-beam rail groove 9 needs to be larger than that of the cross section of the rail 51, so as to avoid the bending unit 54 entering the yielding hole 53 from generating a blocking effect on the i-beam rail groove 9, thereby enabling the end movable frame 4 and the support movable frame 6 to continuously move on the rail 51; the rail 51 may also be a circular tube, and a sleeve structure suitable for being sleeved on the rail 51 (i.e. the circular tube) may be formed at the bottom ends of the end head movable frame 4 and the support movable frame 6 to serve as a rail groove matched with the rail 51.

Specifically, the portion of the end movable frame 4 and the support movable frame 6 that will be extruded by the bending unit 54 may be welded or screwed with the reinforcing block 91 in advance, and the surface of the reinforcing block 91 that will abut against the bending unit 54 is in a circular arc shape, so that the portion of the end movable frame 4 and the support movable frame 6 that will be extruded by the bending unit 54 is not easy to be extruded and damaged, and the end movable frame 4 or the support movable frame 6 is blocked on the rail 51.

Referring to fig. 3 and 8, in one embodiment, the bending unit 54 may include a receiving portion 542 and a wedge block 543, where the receiving portion 542 is connected to a side of the end of the relief hole 53 near the guide end 2, and the wedge block 543 is detachably connected to a side of the receiving portion 542 facing away from the relief hole 53. In the process of installation, the wedge blocks 543 may be installed after the end movable frame 4 and the support movable frame 6 are moved to the predetermined positions, so that the bending unit 54 can be prevented from blocking the end movable frame 4 and the support movable frame 6 from being moved to the predetermined installation positions along the rail 51, and thus the installation of the end movable frame 4 and the support movable frame 6 can be facilitated.

The working principle of the upstream end guardrail in use is as follows:

the guide end 2 is arranged at the initial end of the protection plate 1 and is connected with the end movable frame 4, the end movable frame 4 is arranged on the guide rail unit 5 and can move along the guide rail unit 5, the guide rail unit 5 is connected with a road and is arranged along the direction of the road, a guide groove 21 comprising an introduction section 211, a bending section 212 and a bending section 213 is formed in the guide end 2, the bending section 212 extends towards one side far away from the road, the guide end 2 moves along the direction of the road after being collided, the protection plate 1 enters the introduction section 211 along with the movement of the guide end 2 and deforms along the bending section 213, and finally the protection plate 1 penetrates out from the bending section 212 to the direction far away from the road, so that the protection plate 1 is not easy to prick into a vehicle body after deformation, and the situation that drivers and passengers are injured is caused.

The part of keeping away from the initiating terminal on the guard plate 1 is connected with the bracing piece 3 of locating in the road of inserting to can make guard plate 1 be difficult for removing to the direction of keeping away from direction end 2 after receiving direction end 2's extrusion, thereby guarantee that guard plate 1 can take place deformation in direction end 2's inside, play deformation energy-absorbing effect, and then can play the deceleration to the vehicle that collides with the end guardrail of upper reaches.

It should be noted that the above embodiments are all preferred embodiments of the present application, and the scope of protection of the present application is not limited thereby: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (5)

1. An upstream end rail, comprising: the novel anti-theft protection device comprises a protection plate (1), a guide end head (2), a support rod (3), an end head movable frame (4) and a guide rail unit (5), wherein a guide groove (21) is formed in the guide end head (2), the guide groove (21) comprises a guide section (211), a bending section (212) and a bending section (213), the guide section (211) is sleeved on the starting end of the protection plate (1), the bending section (212) extends towards one side far away from a road, the bending section (213) is connected with the guide section (211) and the bending section (212), and the protection plate (1) extending into the guide section (211) can deform along the bending section (213) and penetrate out of the bending section (212); the guide end head (2) is arranged at the starting end of the protection plate (1), and the guide end head (2) is connected with the end head movable frame (4); the guide rail unit (5) is connected with a road, the guide rail unit (5) is arranged along the direction of the road, the end movable frame (4) is arranged on the guide rail unit (5) and can move along the guide rail unit (5), the part, far away from the starting end, of the protection plate (1) is connected with the support rod (3), and the support rod (3) is inserted into the road;

an energy absorption groove (11) is formed in the protection plate (1) along the road direction, the energy absorption groove (11) comprises a connecting hole (111), a release hole (112) and an energy absorption strip (113), the connecting hole (111) is formed in one end, close to the guide end head (2), of the energy absorption groove (11), the release hole (112) is formed in one end, far away from the guide end head (2), of the energy absorption groove (11), and the energy absorption strip (113) is arranged in the energy absorption groove (11) and is located between the connecting hole (111) and the release hole (112); the guide rail unit (5) is provided with a support movable frame (6) capable of moving along the guide rail unit (5), the connecting hole (111) is internally provided with a bolt (7) used for being connected with the support movable frame (6) or the end movable frame (4), and the bolt (7) can move from the connecting hole (111) to the release hole (112);

the guide rail unit (5) comprises a rail (51) and supporting seats (52), the supporting seats (52) are arranged at two ends of the rail (51), and the supporting seats (52) are connected with a road;

be equipped with a plurality of holes (53) and bending unit (54) of stepping down along its length direction on track (51), be close to on the hole (53) of stepping down one side of direction end (2) is equipped with bending unit (54), bending unit (54) are in the outside of track (51) is formed with inclined plane (541), inclined plane (541) are from being close to direction end (2) to keeping away from in the direction of direction end (2) keep away from track (51), move through inclined plane (541) end movable frame (4) with support movable frame (6) all can with bending unit (54) press brake is gone into in stepping down hole (53).

2. An upstream end rail according to claim 1, wherein: the guide end head (2) is provided with a collision end head (22), and the collision end head (22) is connected with one side of the bending-out section (212) away from the introducing section (211).

3. An upstream end rail according to claim 2, wherein: a reinforcing plate (23) is arranged between the collision end (22) and the guide end (2), one end of the reinforcing plate (23) is connected with the collision end (22), and the other end of the reinforcing plate (23) is connected with the bending section (213).

4. An upstream end rail according to claim 1, wherein: anti-blocking blocks (8) are arranged between the protection plate (1) and the end movable frame (4) and between the protection plate (1) and the support movable frame (6).

5. An upstream end rail according to claim 1, wherein: the bending unit (54) comprises a bearing part (542) and a wedge-shaped block (543), and the bearing part (542) is connected with one side, close to the guide end head (2), of the port of the abdication hole (53); the wedge-shaped block (543) is detachably connected to one surface of the receiving portion (542) facing away from the yielding hole (53).