CN112477963A

CN112477963A - Transfer device for bricks in constructional engineering

Info

Publication number: CN112477963A
Application number: CN202011441871.9A
Authority: CN
Inventors: 潘俐; 孙静洁
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-12-29
Filing date: 2018-12-29
Publication date: 2021-03-12
Also published as: CN109677478A; CN109677478B; CN112477964A

Abstract

The invention belongs to the technical field of building material transfer, and particularly relates to a transfer device for bricks in building engineering, which comprises a vehicle body, a driving gear, a first brake mechanism, a trigger mechanism and a second brake mechanism, wherein the driving gear is arranged on an axle and is in key fit with the axle; when the vehicle body brakes on a downhill, the automatic braking of the vehicle body can be realized only by treading a pedal lever, so that the physical strength of a puller is saved to the maximum extent, and the safety of the puller is further ensured; on the other hand, the special structure of the friction pad covered on the axle in the second brake mechanism enables the brick pulling vehicle to have different friction forces on the slope surfaces with different gradients, the larger the gradient is, the larger the brake force is, the brick pulling vehicle on the slope surfaces with different gradients is guaranteed to have the matched brake force for reducing the advancing speed, and the safety of brick pulling work is effectively guaranteed.

Description

Transfer device for bricks in constructional engineering

Technical Field

The invention belongs to the field of buildings, and particularly relates to a transfer device for bricks in constructional engineering.

Background

The brick pulling vehicle used in the traditional construction site generally does not have a brake mechanism, and when the brick pulling vehicle which is full of bricks and does not have the brake mechanism moves downwards on a slope surface with a small angle, the downhill speed of the brick pulling vehicle can be completely slowed down by the pulling force of a brick puller; if the brick pulling vehicle which pulls the bricks fully advances downwards on a large-angle slope surface, the pulling force of the brick pulling vehicle is not enough to limit the sliding speed of the brick pulling vehicle caused by the self gravity, and the speed is rapidly increased along with the continuous descending of the fully loaded brick pulling vehicle; the full-load brick pulling vehicle which runs at high speed without limitation poses great threat to the safety of people pulling the vehicle and people under the slope; even if the brick pulling vehicle with the brake mechanism encounters a road surface with a large slope, the brick pulling person needs to always hold the brake handle on the beam until the brick pulling vehicle reaches the bottom of the slope, the whole braking process consumes the physical strength of the brick pulling person, if the physical condition of the brick pulling person is not good enough, the brick pulling person is likely to be unable to continue braking due to poor back force of the brick pulling person when the fully loaded brick pulling vehicle travels to the middle of the slope, so that serious industrial accidents are caused, unnecessary injuries are brought to individuals, and serious economic losses are brought to a collective body.

The invention designs a transfer device for bricks in constructional engineering, which solves the problems.

Disclosure of Invention

In order to solve the defects in the prior art, the invention discloses a transfer device for bricks in constructional engineering, which is realized by adopting the following technical scheme.

In the description of the present invention, it should be noted that the terms "inside", "below", "upper" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention usually place when using, and are only used for convenience of description and simplification of description, but do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed in a specific orientation or be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

The utility model provides a transfer device that building engineering is used for fragment of brick which characterized in that: it includes the automobile body that constitutes by sweep, frame, axletree, wheel, handlebar hand, car leg and block, its characterized in that: the brake device comprises a driving gear, a first brake mechanism, a trigger mechanism and a second brake mechanism, wherein the driving gear is arranged on an axle and is matched with an axle key; the second brake mechanism is arranged on the axle; the first brake mechanism is arranged on the lower plate surface of the vehicle plate and matched with the second brake mechanism; the trigger mechanism is installed on the lower plate surface of the vehicle plate and is matched with the driving gear, the first brake mechanism and the second brake mechanism at the same time.

The first brake mechanism comprises a first fixed block, a sliding block, a first return spring, a trapezoidal guide block, a rack, a telescopic column, a pressure spring and a top block, wherein the first fixed block is arranged on the lower plate surface of the vehicle plate, and the sliding block with the rack arranged on the side surface slides in a guide groove on the first fixed block; the trapezoidal guide block arranged on the sliding block is in sliding fit with the trapezoidal sliding groove on the side wall of the guide groove in the first fixing block, so that the sliding block is guided and limited to move; one end of the first return spring is connected with the lower end face of the sweep, and the other end of the first return spring is connected with the upper end face of the sliding block; the top block is arranged at the lower end of the sliding block through a telescopic column; the pressure spring is nested on the telescopic column.

The second brake mechanism comprises a positioning disc, a supporting shaft sleeve, a friction pad and a first weight, wherein the positioning disc and the supporting shaft sleeve are nested on the axle and matched with an axle bearing together, and the disc surface of the positioning disc is fixedly connected with the end surface of the supporting shaft sleeve; the first weight block is fixedly arranged on the outer circular surface of the supporting shaft sleeve, and the friction pad is fixedly arranged on the end surface of the supporting shaft sleeve far away from the positioning disc and is simultaneously matched with the axle coated by the friction pad and the top block positioned above the axle.

The trigger mechanism comprises a second fixed block, support lugs, a trigger block, a transmission shaft, a transmission gear, a trigger gear, a third fixed block, a first limiting block, a first tension spring plate, a third return spring, a second weight block and a second return spring, wherein the second fixed block is fixedly arranged on the lower end surface of the vehicle plate, and the two support lugs with through movable grooves are arranged on the lower end surface of the second fixed block; the second fixed block is arranged in a moving cavity of the second fixed block in a sliding manner, and the second return spring is arranged in the moving cavity and plays a role in returning the movement of the second fixed block; the trigger block is arranged between the two support lugs through a transmission shaft, and the top end of the trigger block with an inclined plane penetrates through a sliding hole in the lower plate surface of the second fixed block to enter the motion cavity to be matched with the second fixed block; the transmission gear and the trigger gear are respectively installed at two ends of the transmission shaft in a key fit manner; the third return spring is sleeved on the trigger block and is arranged between the lower surface of the second fixed block and the first tension spring plate fixedly arranged on the trigger block; the first limiting block fixedly arranged on the trigger block through the third fixing block is in limiting fit with the positioning disc below.

As a further improvement of the technology, an axle in the vehicle body is matched with two frames through a bearing, and two wheels are respectively and fixedly arranged at two ends of the axle; the wheels rotating in this way can drive the driving gear to rotate synchronously through the axle.

As a further improvement of the technology, the friction pad has elasticity, the inner circular surface of the friction pad is coaxial with the outer circular surface of the axle, and a gap is formed between the inner circular surface of the friction pad and the outer circular surface of the axle.

As a further improvement of the technology, the guide groove is formed on the side end surface of the first fixed block and is communicated with the upper end surface and the lower end surface of the first fixed block; the lower end of the top block is provided with an inwards concave cambered surface, and the outer edge surface of the friction pad matched with the inwards concave cambered surface at the lower end of the top block is a gradually-changing curvature curved surface; when the vehicle body descends, the curvature of the outer circular surface of the friction pad gradually decreases and the arc radius gradually increases along with the swinging of the ejector block around the central axis of the axle, and the interaction between the ejector block and the friction pad is tighter; the characteristic of the friction pad enables the brick pulling vehicle to have different braking effects on slopes with different inclinations.

As a further improvement of the technology, the upper end of the trigger block is provided with an inclined plane which inclines to the opposite side of the second weight block, the inclined plane is matched with the second weight block in the motion cavity, and the inclined plane is acted on the upper end of the trigger block when the second weight block slides over the trigger block, so that the trigger block drives the trigger gear and the transmission gear to move downwards together through the transmission shaft, and the trigger gear is further enabled to meet and be meshed with the driving gear on the axle; the lower end of the trigger block is provided with a shaft hole, and the shaft hole is matched with the transmission shaft through a bearing, so that the trigger gear driven by the drive gear can directly drive the transmission gear coaxial with the trigger gear to synchronously rotate through the transmission shaft.

As a further improvement of the technology, lubricating grease is smeared in the moving cavity of the second fixed block, so that the sliding resistance of the second fixed block in the moving cavity is ensured to be reduced to the minimum.

As a further improvement of the present technology, the first return spring is an extension spring; the second return spring is an extension spring, one end of the second return spring is connected with the inner wall of the motion cavity, and the other end of the second return spring is connected with the second block; and the third return springs are all extension springs.

As a further improvement of the technology, the pressure spring is a compression spring, one end of the pressure spring is installed on the top block, and the other end of the pressure spring is installed on the sliding block.

As a further improvement of the technology, the lower end of the first limiting block is a sharp corner formed by two intersected inclined surfaces, a plurality of V-shaped grooves with continuous heads and tails are uniformly formed in the circumferential direction of the outer circular surface of the positioning disc, and the sharp corner at the lower end of the first limiting block is matched with the V-shaped grooves on the positioning disc; after the brake begins, first stopper is spacing to the positioning disk, prevents that the positioning disk from rotating under the rotatory drive of axletree.

As a further improvement of the technology, the trigger mechanism further comprises a guide rail sleeve, a second limiting block, a second tension spring plate, a fourth return spring and a pedal lever, wherein the guide rail sleeve is installed on the lower end face of the second fixing block and is in butt joint with a limiting hole on the lower end face of the second fixing block; the upper end of the second limiting block sequentially penetrates through the guide rail sleeve and the limiting hole from bottom to top to be matched with the limiting groove on the lower end face of the second block; an inclined plane is formed at the upper end of the second limiting block and inclines towards the direction of the second return spring; the fourth return spring is nested outside the guide rail sleeve, the upper end of the fourth return spring is connected with the lower end face of the second fixed block, and the lower end of the fourth return spring is connected with a second tension spring plate which is nested and fixedly installed outside the second limiting block, so that the fourth return spring has a reset effect on the movement of the second limiting block; one end of the pedal lever is fixedly connected with the lower end of the second limiting block.

The pressure spring in the invention has larger elastic coefficient to ensure that the pressure exerted on the friction pad by the sliding block through the pressure spring is enough, and the friction force between the friction pad and the axle is enough to form effective deceleration effect.

The first weight block has the effects that the positioning disc, the supporting shaft sleeve and the axle are matched through the bearing, so that under the action of the gravity of the first weight block, no matter the brick pulling vehicle is in a horizontal position or an inclined position on an inclined slope, the first weight block is always positioned under the axle, and the position of the friction pad is always unchanged, so that the brick pulling vehicle has different braking effects on slopes with different inclinations, when the slope is large, the top block and the upper arc radius of the friction pad interact with each other, the friction force generated by the friction pad on the axle is also large, the braking effect is better, when the slope is small, the braking force required by the loaded brick pulling vehicle is small, at the moment, the top block and the upper arc radius of the friction pad interact with each other, and the friction force generated by the friction pad on the axle is small and is matched with the braking force required by the small-slope brick pulling vehicle.

Compared with the traditional brick transfer device, when the vehicle body brakes on a downhill, the automatic braking function of the vehicle body can be realized only by treading a pedal rod, and a brake hand brake is not required to be held all the time in the braking process like the traditional manual brake device, so that the physical strength of a vehicle puller is saved to the maximum extent, the working efficiency is improved, the safety factor of the fully loaded vehicle body in the downhill process is improved, the safety of the vehicle puller is further ensured, the occurrence of collision accidents caused by the fact that the vehicle body does not brake on the downhill is avoided, the possibility of accidents is fundamentally reduced, and the life safety of individuals is ensured; on the other hand, the special structure of the friction pad covered on the axle in the second brake mechanism enables the brick pulling vehicle to bear different friction forces on the slope surfaces with different gradients, the larger the gradient is, the larger the braking force is, the brick pulling vehicle on the slope surfaces with different gradients is guaranteed to bear the matched braking force for reducing the advancing speed, and the safety of brick pulling work is effectively guaranteed; the invention has simple structure and better use effect.

Drawings

FIG. 1 is a schematic view of a brick pulling cart.

FIG. 2 is a cross-sectional view of the first brake mechanism, the trigger mechanism, the second brake mechanism and the vehicle body.

FIG. 3 is a cross-sectional view of the first brake mechanism, the trigger mechanism and the second brake mechanism.

FIG. 4 is a cross-sectional view of the trigger mechanism and the second brake mechanism.

FIG. 5 is a schematic view of the first braking mechanism, the triggering mechanism and the second braking mechanism.

FIG. 6 is a schematic view of a second braking mechanism.

FIG. 7 is a schematic view of a first braking mechanism.

FIG. 8 is a cross-sectional view of the first braking mechanism.

Fig. 9 is a schematic view of a first fixing block.

Fig. 10 is a schematic view of the trigger mechanism.

Fig. 11 is a schematic cross-sectional view of the trigger mechanism.

Fig. 12 is a schematic view of the second fixing block and the lug.

FIG. 13 is a cross-sectional view of the second fixing block and the lug.

Number designation in the figures: 1. a vehicle body; 2. turning a plate; 3. a frame; 4. an axle; 5. a wheel; 6. a handlebar; 7. a vehicle leg; 8. blocking; 9. a drive gear; 10. a first brake mechanism; 11. a trigger mechanism; 12. a second brake mechanism; 13. a first fixed block; 14. a guide groove; 15. a trapezoidal chute; 16. a slider; 17. a trapezoidal guide block; 18. a rack; 19. a telescopic column; 20. a pressure spring; 21. a top block; 22. a first return spring; 23. positioning a plate; 24. a support sleeve; 25. a friction pad; 26. a first weight; 27. a second fixed block; 28. a motion cavity; 29. a slide hole; 30. supporting a lug; 31. a movable groove; 32. a trigger block; 33. a drive shaft; 34. a transmission gear; 35. triggering a gear; 36. a third fixed block; 37. a first stopper; 38. a first tension spring plate; 39. a third return spring; 40. a second weight; 41. a second return spring; 42. a limiting hole; 43. a guide rail sleeve; 44. a second limiting block; 45. a second tension spring plate; 46. a fourth return spring; 47. a foot bar; 48. a limiting groove.

Detailed Description

As shown in fig. 1, the vehicle comprises a vehicle body 1 consisting of a vehicle plate 2, a vehicle frame 3, an axle 4, wheels 5, a handlebar 6, vehicle legs 7 and a barrier 8, and is characterized in that: the brake device comprises a driving gear 9, a first brake mechanism 10, a trigger mechanism 11 and a second brake mechanism 12, wherein as shown in figures 1 and 2, the driving gear 9 is arranged on an axle 4 and is in key fit with the axle 4; as shown in fig. 2 and 3, the second brake mechanism 12 is mounted on the axle 4; as shown in fig. 3, the first brake mechanism 10 is mounted on the lower plate surface of the vehicle plate 2 and cooperates with the second brake mechanism 12; as shown in fig. 1, 4 and 5, the trigger mechanism 11 is mounted on the lower plate surface of the vehicle plate 2, and the trigger mechanism 11 is simultaneously engaged with the driving gear 9, the first brake mechanism 10 and the second brake mechanism 12.

As shown in fig. 7, the first brake mechanism 10 includes a first fixed block 13, a slider 16, a first return spring 22, a trapezoidal guide block 17, a rack 18, a telescopic column 19, a pressure spring 20, and a top block 21, wherein as shown in fig. 2 and 3, the first fixed block 13 is mounted on the lower plate surface of the vehicle plate 2, and the slider 16 having the rack 18 mounted on the side surface thereof slides in the guide groove 14 of the first fixed block 13; as shown in fig. 8, the trapezoidal guide block 17 on the sliding block 16 is in sliding fit with the trapezoidal sliding groove 15 on the side wall of the guide groove 14 in the first fixed block 13, so as to guide and limit the movement of the sliding block 16; as shown in fig. 2, one end of the first return spring 22 is connected to the lower end surface of the sweep 2, and the other end is connected to the upper end surface of the slider 16; as shown in fig. 7, the top block 21 is mounted on the lower end of the slider 16 through a telescopic post 19; the compression spring 20 is nested on the telescopic column 19.

As shown in fig. 6, the second brake mechanism 12 includes a positioning disc 23, a supporting shaft sleeve 24, a friction pad 25, and a first weight 26, wherein as shown in fig. 2, the positioning disc 23 and the supporting shaft sleeve 24 are nested on the axle 4 together and are in bearing fit with the axle 4, and a disc surface of the positioning disc 23 is fixedly connected with an end surface of the supporting shaft sleeve 24; as shown in fig. 3 and 6, the first weight 26 is fixedly mounted on the outer circumferential surface of the support sleeve 24, and the friction pad 25 is fixedly mounted on the end surface of the support sleeve 24 away from the positioning plate 23 and is simultaneously engaged with the axle 4 covered thereby and the top block 21 located thereabove.

As shown in fig. 10, the triggering mechanism 11 includes a second fixed block 27, a support lug 30, a triggering block 32, a transmission shaft 33, a transmission gear 34, a triggering gear 35, a third fixed block 36, a first limit block 37, a first tension spring plate 38, a third return spring 39, a second weight 40, and a second return spring 41, where as shown in fig. 4, the second fixed block 27 is fixedly mounted on the lower end surface of the vehicle panel 2; as shown in fig. 12 and 13, two lugs 30 having through-going movable grooves 31 are mounted on the lower end surface of the second fixed block 27; as shown in fig. 4 and 11, the second weight 40 is slidably mounted in the moving cavity 28 of the second fixed block 27, and the second return spring 41 is mounted in the moving cavity 28 to exert a return action on the movement of the second weight 40; the trigger block 32 is installed between the two lugs 30 through the transmission shaft 33, and the top end with the inclined surface of the trigger block passes through the slide hole 29 on the lower plate surface of the second fixed block 27 to enter the motion cavity 28 to be matched with the second block 40; as shown in fig. 10, a transmission gear 34 and a trigger gear 35 are respectively installed at both ends of the transmission shaft 33 by key-fitting; the third return spring 39 is sleeved on the trigger block 32 and is arranged between the lower surface of the second fixed block 27 and the first tension spring plate 38 fixedly arranged on the trigger block 32; the first stop block 37 fixedly mounted on the trigger block 32 through the third fixing block 36 is in limit fit with the positioning plate 23 below.

As shown in fig. 1, an axle 4 of the vehicle body 1 is in bearing fit with two frames 3, and two wheels 5 are respectively fixedly mounted at two ends of the axle 4; the wheels 5 rotating in this way can bring the driving gear 9 into synchronous rotation via the axle 4.

As shown in fig. 3 and 6, the friction pad 25 has elasticity, the inner circular surface of the friction pad 25 is coaxial with the outer circular surface of the axle 4, and a gap exists between the inner circular surface of the friction pad 25 and the outer circular surface of the axle 4.

As shown in fig. 9, the guide groove 14 is opened on the side end surface of the first fixing block 13 and penetrates the upper and lower end surfaces of the first fixing block 13; as shown in fig. 7, the lower end of the top block 21 has a concave arc surface; as shown in fig. 6, the outer edge surface of the friction pad 25, which is matched with the concave arc surface at the lower end of the top block 21, is a curved surface with gradually-changed curvature; when the vehicle body 1 descends, the curvature of the outer circular surface of the friction pad 25 gradually decreases and the arc radius gradually increases as the ejector block 21 swings around the central axis of the axle 4, and the interaction between the ejector block 21 and the friction pad 25 is tighter; this feature of the friction pad 25 allows the brick-pulling vehicle to experience different braking effects on sloping surfaces of different inclination.

As shown in fig. 4, the upper end of the trigger block 32 has a slope and the slope is inclined to the opposite side of the second weight 40, and the slope is matched with the second weight 40 in the movement cavity 28, so that when the second weight 40 slides over the trigger block 32, the slope acts on the upper end of the trigger block 32, and the trigger block 32 drives the trigger gear 35 and the transmission gear 34 to move downwards together through the transmission shaft 33, and further the trigger gear 35 meets and is meshed with the driving gear 9 on the axle 4; as shown in fig. 10, the lower end of the trigger block 32 is provided with a shaft hole, and the shaft hole is matched with the transmission shaft 33 through a bearing, so that the trigger gear 35 driven by the driving gear 9 can directly drive the transmission gear 34 coaxial with the trigger gear to synchronously rotate through the transmission shaft 33.

As shown in fig. 11, grease is applied to the moving cavity 28 of the second fixed block 27 to ensure that the sliding resistance of the second weight 40 in the moving cavity 28 is minimized.

As shown in fig. 2 and 4, the first return spring 22 is an extension spring; the second return spring 41 is an extension spring, one end of which is connected with the inner wall of the movement cavity 28, and the other end of which is connected with the second weight 40; the third return springs 39 are both extension springs.

As shown in fig. 7, the compression spring 20 is a compression spring, and one end of the compression spring 20 is attached to the top block 21 and the other end is attached to the slider 16.

As shown in fig. 5 and 10, the lower end of the first limiting block 37 is a sharp corner formed by two intersecting inclined surfaces, the outer circumferential surface of the positioning disc 23 is uniformly provided with a plurality of V-shaped grooves which are continuous from end to end along the circumferential direction, and the sharp corner at the lower end of the first limiting block 37 is matched with the V-shaped grooves on the positioning disc 23; after the braking starts, the first limiting block 37 limits the positioning disc 23, and prevents the positioning disc 23 from rotating under the driving of the rotation of the axle 4.

As shown in fig. 10 and 11, the triggering mechanism 11 further includes a guide rail sleeve 43, a second limiting block 44, a second tension spring plate 45, a fourth return spring 46, and a pedal rod 47, wherein the guide rail sleeve 43 is mounted on the lower end surface of the second fixing block 27 and is abutted with the limiting hole 42 on the lower end surface of the second fixing block 27; the upper end of the second limiting block 44 sequentially penetrates through the guide rail sleeve 43 and the limiting hole 42 from bottom to top to be matched with the limiting groove 48 on the lower end face of the second weight 40; the upper end of the second stopper 44 is provided with an inclined surface, and the inclined surface is inclined towards the direction of the second return spring 41; the fourth return spring 46 is nested outside the guide rail sleeve 43, the upper end of the fourth return spring is connected with the lower end face of the second fixed block 27, and the lower end of the fourth return spring is connected with a second tension spring plate 45 which is nested and fixedly installed outside the second limiting block 44, so that a reset effect is generated on the movement of the second limiting block 44; one end of the pedal rod 47 is fixedly connected with the lower end of the second limiting block 44.

The pressure spring 20 of the present invention has a large elastic coefficient to ensure that the pressure applied by the slider 16 to the friction pad 25 via the pressure spring 20 is large enough, and the friction force between the friction pad 25 and the axle 4 is large enough to provide an effective deceleration effect.

The first weight 26 of the present invention functions to prevent the axle shaft 4 from being damaged due to the bearing fit between the positioning plate 23 and the support sleeve 24, therefore, under the action of the gravity of the first weight 26, no matter the brick pulling vehicle is in a horizontal position or an inclined position on a slope, the first weight 26 is always positioned right below the axle 4, the position of the friction pad 25 is always unchanged, the brick pulling vehicle has different braking effects on slopes with different gradients, the ejector block 21 interacts with the part with larger arc radius on the friction pad 25 when the gradient is large, the friction force generated by the friction pad 25 on the axle 4 is also larger, the braking effect is better, the gradient is small, the braking force required by the loaded brick pulling vehicle is small, at the moment, the top block 21 and the friction pad 25 are interacted at the position with the small arc radius, and the friction pad 25 generates small friction force on the axle 4 and is matched with the braking force required by the brick pulling vehicle on the small slope.

The working process of the invention is as follows: when the brick pulling vehicle with load needs to decelerate when going downhill, the pedal lever 47 is firstly stepped, the pedal lever 47 drives the second limiting block 44 to move downwards along the guide rail sleeve 43 and separate from the limiting groove 48 on the lower end face of the second weight 40, the second limiting block 44 relieves the limitation on the second weight 40, and the fourth return spring 46 is stretched; the second weight 40 which inclines along with the vehicle body 1 moves along the movement cavity 28 to the trigger block 32 under the action of self gravity, and the second return spring 41 is stretched; when the second weight 40 meets the trigger block 32 and acts on the slope of the upper end of the trigger block 32, the trigger block 32 moves downward along the slide hole 29; the trigger block 32 drives the trigger gear 35 and the transmission gear 34 which are arranged at two ends of the transmission shaft 33 to synchronously move downwards through the transmission shaft 33 matched with the bearing of the trigger block, the third return spring 39 is stretched, and meanwhile, the transmission gear 34 drives the coaxial trigger gear 35 to idle through the transmission shaft 33 under the action of meshing with the rack 18; after the trigger gear 35 meets and is meshed with the driving gear 9 which is arranged on the axle 4 below, the driving gear 9 which synchronously rotates with the wheels 5 drives the trigger gear 35 to immediately rotate reversely because the torque of the driving gear 9 is larger, and during the period, the second weight 40 always presses the trigger block 32 downwards, so that the trigger gear 35 is ensured to be well meshed with the driving gear 9; meanwhile, the sharp corner of the first limiting block 37 fixedly connected with the trigger block 32 through the third fixing block 36 is inserted into the corresponding V-shaped groove on the lower positioning disk 23, the first limiting block 37 limits the positioning disk 23, and the position of the friction pad 25 arranged on the end face of the support shaft sleeve 24 fixedly connected with the disk face of the positioning disk 23 is limited; the trigger gear 35 drives the coaxial transmission gear 34 to synchronously and reversely rotate through the transmission shaft 33; the transmission gear 34 drives the sliding block 16 to move downwards along the guide groove 14 on the first fixing block 13 through the rack 18 meshed with the transmission gear, the first return spring 22 is stretched, when the upper end of the rack 18 is meshed with the transmission gear 34 and the last tooth at the upper end of the rack 18 is continuously stirred downwards to keep the rack 18 in a downward-pressing state and not move any more, the sliding block 16 drives the top block 21 arranged at the lower end of the telescopic column 19 to move downwards through the pressure spring 20 and the telescopic column 19 and presses the friction pad 25 covering the axle 4 below; the friction pad 25 forms friction on the axle 4 under the pressure of the top block 21 so as to play a role of reducing the speed of the brick pulling vehicle moving downwards on a slope surface, the downward speed of the loaded brick pulling vehicle is reduced, and the safety of a brick pulling vehicle and the damage to the brick pulling vehicle are guaranteed; in the whole braking process, the brick pulling vehicle can be automatically braked by only stepping on the pedal rod 47 by a vehicle puller, so that the physical strength of the vehicle puller is saved to the maximum extent; the special structure of the friction pad 25 wrapped on the axle 4 in the second brake mechanism 12 makes the deformation amount of the pressure spring 20 different, and further the pressure of the pressure spring 20 on the friction pad 25 is different, and the friction force of the friction pad 25 on the axle 4 is different, so that the friction force on the slope surfaces with different slopes of the brick pulling cart is different, and the larger the slope is, the larger the resistance force on the brick pulling cart is.

When the loaded vehicle body 1 slowly travels down a slope, the vehicle body 1 returns to the horizontal position, and the second weight 40 moves toward the initial position along the movement chamber 28 under the action of the second return spring 41; in the process that the second weight 40 moves to the initial position, the second weight 40 is pressed down by the inclined surface acting on the upper end of the second stopper 44; when the second weight 40 returns to the initial position, the second limiting block 44 enters the limiting groove 48 on the lower end surface of the second weight 40 under the action of the fourth return spring 46 to limit the second weight 40 again; when the second weight 40 is disengaged from the trigger block 32, the trigger block 32 drives the trigger gear 35 and the transmission gear 34 to return to the initial position through the transmission shaft 33 under the action of the third return spring 39; the trigger gear 35 is disengaged from the drive gear 9, the top block 21 returns to the initial position by the first return spring 22 and is disengaged from the friction pad 25, and the elastic friction pad 25 is restored to the original state and is disengaged from the axle 4.

In conclusion, the invention has the beneficial effects that: when the vehicle body 1 brakes on a downhill, the automatic braking function of the vehicle body 1 can be realized only by stepping on the pedal rod 47, a brake hand brake is not required to be held all the time in the braking process like a traditional manual brake device, the physical strength of a vehicle puller is saved to the maximum extent, the working efficiency is improved, the safety factor of the fully loaded vehicle body 1 in the downhill process is improved, the safety of the vehicle puller is further ensured, the occurrence of collision accidents caused by the fact that the vehicle body 1 on the downhill is not braked is avoided, the possibility of accidents is fundamentally reduced, and the life safety of individuals is ensured; on the other hand, the special structure of the friction pad 25 wrapped on the axle 4 in the second brake mechanism 12 makes the brick pulling cart receive different friction forces on the slope surfaces with different slopes, and the larger the slope surface is, the larger the brake force is, so that the brick pulling cart on the slope surfaces with different slopes receives the matched brake force for reducing the advancing speed, and the safety of brick pulling work is effectively ensured.

Claims

1. The utility model provides a building engineering is used for transfer device of fragment of brick, it includes the automobile body that constitutes by sweep, frame, axletree, wheel, handlebar hand, car leg and block, its characterized in that: the brake device comprises a driving gear, a first brake mechanism, a trigger mechanism and a second brake mechanism, wherein the driving gear is arranged on an axle and is matched with an axle key; the second brake mechanism is arranged on the axle; the first brake mechanism is arranged on the lower plate surface of the vehicle plate and matched with the second brake mechanism; the trigger mechanism is arranged on the lower plate surface of the vehicle plate and is simultaneously matched with the driving gear, the first brake mechanism and the second brake mechanism;

the first brake mechanism comprises a first fixed block, a sliding block, a first return spring, a trapezoidal guide block, a rack, a telescopic column, a pressure spring and a top block, wherein the first fixed block is arranged on the lower plate surface of the vehicle plate, and the sliding block with the rack arranged on the side surface slides in a guide groove on the first fixed block; the trapezoidal guide block arranged on the sliding block is in sliding fit with the trapezoidal sliding groove on the side wall of the guide groove in the first fixing block, so that the sliding block is guided and limited to move; one end of the first return spring is connected with the lower end face of the sweep, and the other end of the first return spring is connected with the upper end face of the sliding block; the top block is arranged at the lower end of the sliding block through a telescopic column; the pressure spring is nested on the telescopic column;

the second brake mechanism comprises a positioning disc, a supporting shaft sleeve, a friction pad and a first weight, wherein the positioning disc and the supporting shaft sleeve are nested on the axle and matched with an axle bearing together, and the disc surface of the positioning disc is fixedly connected with the end surface of the supporting shaft sleeve; the first weight block is fixedly arranged on the outer circular surface of the supporting shaft sleeve, and the friction pad is fixedly arranged on the end surface of the supporting shaft sleeve far away from the positioning disc and is simultaneously matched with the axle coated by the friction pad and the top block positioned above the axle;

the trigger mechanism comprises a second fixed block, support lugs, a trigger block, a transmission shaft, a transmission gear, a trigger gear, a third fixed block, a first limiting block, a first tension spring plate, a third return spring, a second weight block and a second return spring, wherein the second fixed block is fixedly arranged on the lower end surface of the vehicle plate, and the two support lugs with through movable grooves are arranged on the lower end surface of the second fixed block; the second fixed block is arranged in a moving cavity of the second fixed block in a sliding manner, and the second return spring is arranged in the moving cavity and plays a role in returning the movement of the second fixed block; the trigger block is arranged between the two support lugs through a transmission shaft, and the top end of the trigger block with an inclined plane penetrates through a sliding hole in the lower plate surface of the second fixed block to enter the motion cavity to be matched with the second fixed block; the transmission gear and the trigger gear are respectively installed at two ends of the transmission shaft in a key fit manner; the third return spring is sleeved on the trigger block and is arranged between the lower surface of the second fixed block and the first tension spring plate fixedly arranged on the trigger block; a first limiting block fixedly arranged on the trigger block through a third fixing block is in limiting fit with a positioning disc below the trigger block;

the trigger mechanism further comprises a guide rail sleeve, a second limiting block, a second tension spring plate, a fourth return spring and a pedal rod, wherein the guide rail sleeve is installed on the lower end face of the second fixing block and is in butt joint with a limiting hole in the lower end face of the second fixing block; the upper end of the second limiting block sequentially penetrates through the guide rail sleeve and the limiting hole from bottom to top to be matched with the limiting groove on the lower end face of the second block; an inclined plane is formed at the upper end of the second limiting block and inclines towards the direction of the second return spring; the fourth return spring is nested outside the guide rail sleeve, the upper end of the fourth return spring is connected with the lower end face of the second fixed block, and the lower end of the fourth return spring is connected with a second tension spring plate which is nested and fixedly installed outside the second limiting block, so that the fourth return spring has a reset effect on the movement of the second limiting block; one end of the pedal lever is fixedly connected with the lower end of the second limiting block;

the inclined surface at the upper end of the trigger block inclines towards the opposite surface of the second weight block, and the inclined surface is matched with the second weight block in the motion cavity; the lower end of the trigger block is provided with a shaft hole, and the shaft hole is matched with the transmission shaft through a bearing;

lubricating grease is smeared in the motion cavity of the second fixed block;

the first return spring is an extension spring; the second return spring is an extension spring, one end of the second return spring is connected with the inner wall of the motion cavity, and the other end of the second return spring is connected with the second block; the third return springs are all extension springs;

the pressure spring is a compression spring, one end of the pressure spring is arranged on the top block, and the other end of the pressure spring is arranged on the sliding block;

the lower end of the first limiting block is a sharp corner formed by two crossed inclined planes, a plurality of V-shaped grooves with continuous heads and tails are uniformly formed in the outer circular surface of the positioning disc along the circumferential direction, and the sharp corner at the lower end of the first limiting block is matched with the V-shaped grooves in the positioning disc.

2. A transfer device for bricks for construction engineering according to claim 1, characterized in that: the axle in the vehicle body is matched with the two frames through bearings, and the two wheels are fixedly arranged at two ends of the axle respectively.

3. A transfer device for bricks for construction engineering according to claim 1, characterized in that: the friction pad has elasticity, the inner circle surface of the friction pad is coaxial with the outer circle surface of the axle, and a gap exists between the inner circle surface of the friction pad and the outer circle surface of the axle.

4. A transfer device for bricks for construction engineering according to claim 1, characterized in that: the guide groove is formed in the side end face of the first fixed block and is communicated with the upper end face and the lower end face of the first fixed block; the lower end of the top block is provided with an inwards concave cambered surface, and the outer edge surface of the friction pad matched with the inwards concave cambered surface at the lower end of the top block is a gradually-changing curvature curved surface; when the vehicle body descends, the curvature of the outer circular surface of the friction pad gradually decreases and the arc radius gradually increases along with the swinging of the ejector block around the central axis of the axle, and the interaction between the ejector block and the friction pad is tighter.