Front sweeping disc reversing anti-collision mechanism

Abstract

The utility model discloses a front sweeping disc reversing anti-collision mechanism which comprises a swing arm connecting rod assembly, a lifting arm assembly, an anti-collision tension spring pulling plate and an anti-collision connecting seat. The tension spring assembly comprises a tension spring, a tension spring rotating shaft and a tension spring rotating plate, the tension spring rotating shaft is connected with the anti-collision connecting base and the tension spring rotating plate, and the anti-collision connecting base moves around the tension spring rotating shaft; the torsion frame assembly comprises a sweeping disc anti-collision torsion shaft, an anti-collision turnover fixing frame and an anti-collision turnover connecting frame, the sweeping disc anti-collision torsion shaft is installed on the anti-collision turnover connecting frame, and a torsion spring is installed on the sweeping disc anti-collision torsion shaft. The anti-collision device has the advantages that the combined structure of the torsion spring and the tension spring is arranged, the anti-collision angle is greatly improved, cost is reduced, meanwhile, the structure is more compact, large design space is provided for other structures, meanwhile, the anti-collision device is simpler in structure, later maintenance and replacement are easier, and the anti-collision device is suitable for large-scale popularization and application. And the later maintenance cost is indirectly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of cleaning vehicles, in particular to a front-mounted sweeping disc reversing anti-collision mechanism. BACKGROUND

[0002] With the gradual deepening of the national urbanization progress, whether it is intercity high speed or urban elevated road, a new need for high-standard road maintenance is put forward, that is, automatic unmanned cleaning. At present, automatic driving still has certain limitations, which leads to its inability to make 100% correct judgment on the external environment, so the working equipment of the automatic driving cleaning vehicle needs to have a certain degree of anti-foreign matter collision and collision emergency stop ability to ensure the integrity of the vehicle and the working mechanism when the automatic driving cannot avoid obstacles.

[0003] The current front-mounted sweeping disc anti-collision structure on the market mostly uses symmetrical compression springs, gas springs or torsional springs as the anti-collision buffer structure, but since the front-mounted sweeping disc is mostly used in large cleaning vehicles, the anti-collision arm of the front-mounted sweeping disc on the market is relatively long, which brings the problem that the compression springs of the anti-collision structure need to use disc springs or rectangular compression springs to ensure sufficient maintenance torque, and the spring stroke is relatively small due to the limitation of the installation space, that is, the rear swing angle of the sweeping disc after being hit is relatively small, and the anti-collision function is not effective. At the same time, the small rear swing angle of the sweeping disc leads to a small reaction space and a short reaction time after being hit, which greatly increases the difficulty of emergency stopping the vehicle without damaging the structure.

[0004] The structure using gas springs solves the problem of small rear swing angle of traditional compression springs to some extent, but at the same time, the gas spring structure is relatively complex, so the price is relatively high, which indirectly increases the overall structure cost, and the service life of the gas spring is greatly reduced compared with ordinary springs under the condition of long-term irregular vibration of the front-mounted sweeping disc, which directly leads to the reduction of the reliability of the structure and the increase of the maintenance cost, which is not conducive to the loading of automatic driving. And due to the principle characteristics of the gas spring itself, its performance is greatly affected by the environment, and its weather resistance is poor, which leads to a significant increase in the failure rate of the gas spring under the harsh working conditions of the front-mounted sweeping disc.

[0005] Although the torsional spring can overcome the shortcomings of small rear swing angle of symmetrical compression spring and high cost and high failure rate of gas spring, due to the structural characteristics of the torsional spring, its spring stiffness is large when the arm is long, which requires a high strength of the sweeping disc structure, and the sweeping disc structure is easily damaged after being hit, which increases the maintenance cost. And because the arm is long, the required torque is large, and the volume of the torsional spring is large, the price is relatively high, and the overall structure cost is increased. SUMMARY

[0006] The utility model provides a kind of front scanning disc reversing anti-collision mechanism, adopt the combined structure of torsion spring and tension spring, greatly improve the anti-collision angle and reduce cost, while make structure more compact, provide greater design space for remaining structure.

[0007] Specifically, the utility model discloses a kind of front scanning disc reversing anti-collision mechanism, comprising:

[0008] Swing arm connecting rod assembly, comprising: lifting arm assembly, anti-collision tension spring pull plate and anti-collision connecting seat, the anti-collision connecting seat is installed in lifting arm assembly one end, the anti-collision tension spring pull plate is connected with the anti-collision connecting seat;

[0009] Tension spring assembly, including tension spring, tension spring rotating shaft and tension spring rotating plate, the tension spring rotating shaft connects the anti-collision tension spring pull plate and the tension spring rotating plate, the tension spring rotating plate moves around the tension spring rotating shaft, one end of the tension spring is installed on the tension spring rotating plate, and the other end is connected with vehicle frame;

[0010] Torsion frame assembly, comprising: scanning disc anti-collision torsion shaft, anti-collision overturning fixed frame and anti-collision overturning connecting frame, the anti-collision overturning fixed frame one end is fixed with vehicle frame, and the other end is connected with anti-collision overturning connecting frame, the anti-collision overturning connecting frame is installed with scanning disc anti-collision torsion shaft, and torsion spring is installed on the scanning disc anti-collision torsion shaft.

[0011] The beneficial effects of the above technical solution are that the combined structure of torsion spring and tension spring is provided, which greatly improves the anti-collision angle and reduces the cost, and makes the structure more compact, providing a larger design space for the remaining structure.

[0012] Further, the anti-collision overturning connecting frame includes a mounting plate, the mounting plate has upper and lower fixed plates fixed on the side surface, the scanning disc anti-collision torsion shaft is rotatably installed between the fixed plates, and the fixed plates are provided with torsion spring limiting screws.

[0013] The beneficial effects of the above technical solution are that the fixed plate is used to install the scanning disc anti-collision torsion shaft, the torsion spring limiting screw is used to limit the rotation position of the torsion spring after the scanning disc is rotated by collision, the torsion spring stores energy, and automatically resets after the collision position.

[0014] Further, the fixed plate is provided with a limiting shaft sleeve.

[0015] The beneficial effect of the above technical scheme is that the limit shaft sleeve limits the swing angle of the swing arm connecting rod assembly, so that the rear swing angle is limited within a certain range, and damage to parts caused by excessive rear swing angle is avoided.

[0016] Further, the anti-collision connecting seat is fixed with a connecting plate, and the anti-collision torsion shaft of the sweeping disc passes through the connecting plate and is rotatably arranged.

[0017] Further, the connecting plate is provided with a proximity switch trigger block, and a proximity switch is arranged on the anti-collision overturning connecting frame. After being impacted, the proximity switch trigger block rotates to the upper side of the proximity switch.

[0018] The beneficial effect of the above technical scheme is that the proximity switch and the proximity switch trigger block can ensure that a signal is sent before the rear swing angle reaches the limit position, so that the vehicle is braked in time to avoid damage to the structure, and the position and limit angle of the proximity switch trigger block have high designability, so that different limit rear swing angles and emergency stop trigger angles can be ensured to meet the needs of different scenes and vehicles.

[0019] Further, a thrust washer is arranged between the anti-collision spring pull plate and the spring rotating plate.

[0020] The beneficial effect of the above technical scheme is that the thrust washer can effectively reduce the friction between the anti-collision spring pull plate and the spring rotating plate, so that the rotation of the swing arm assembly does not drive the rotation of the spring rotating plate.

[0021] Further, the anti-collision spring pull plate is provided with a pull plate limiting block on the side, one end of the pull plate limiting block is connected to the frame, the other end is provided with a containing groove, and the anti-collision spring pull plate extends into the containing groove.

[0022] The beneficial effect of the above technical scheme is that when the spring has a certain pre-tightening force, i.e. when it is not impacted, the swing arm is always in the middle position instead of swinging out to the outside.

[0023] Further, the proximity switch trigger block is arranged on both sides of the proximity switch.

[0024] The beneficial effect of the above technical scheme is that the proximity switch trigger blocks arranged on both sides can sense the position signal after the swing arm assembly swings to the front side or swings to the rear side, so that the vehicle is braked in time.

[0025] Further, the connecting plate is provided with an arc-shaped limiting groove, and the arc-shaped limiting groove is in contact with the limit shaft sleeve when the swing arm connecting rod assembly rotates to the limit position.

[0026] The beneficial effect of the technical scheme is that the position of the swing arm connecting rod assembly is limited through the cooperation of the limiting groove and the limiting shaft sleeve. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments or prior art description will be briefly introduced.

[0028] Figure 1 is the overall structure schematic diagram of the front scanning disc reversing anti-collision mechanism of the present application

[0029] Figure 2 is the swing arm connecting rod assembly structure schematic diagram of the present application

[0030] Figure 3 is the A place enlarged view of the present application

[0031] Figure 4 is the B place enlarged view of the present application

[0032] Figure 5 is the tension spring rotating plate mounting structure diagram of the present application

[0033] Figure 6 is the torsion frame assembly structure schematic diagram of the present application

[0034] The labels involved in the drawings are as follows:

[0035] Lifting arm assembly 1, anti-collision tension spring pull plate 2, thrust washer 21, pull plate limiting block 22, anti-collision connecting seat 3, connecting plate 31, proximity switch trigger block 32, arc-shaped limiting groove 33, tension spring 4, tension spring rotating shaft 5, tension spring rotating plate 6, scanning disc anti-collision torsion shaft 7, torsion spring 71, thrust type flange graphite copper sleeve 72, anti-collision overturning fixing frame 8, anti-collision overturning connecting frame 9, mounting plate 91, fixed plate 92, torsion spring limiting screw 93, limiting shaft sleeve 94, proximity switch 95; DETAILED DESCRIPTION

[0036] The present application will be further described in detail below in combination with the drawings.

[0037] As Figures 1-6 shown, the present application discloses a front scanning disc reversing anti-collision mechanism, comprising:

[0038] The swing arm connecting rod assembly comprises: a lifting arm assembly 1, an anti-collision tension spring pull plate 2 and an anti-collision connecting seat 3, the anti-collision connecting seat 3 is installed at one end of the lifting arm assembly 1, the anti-collision tension spring pull plate 2 is connected with the anti-collision connecting seat 3, and the other end of the lifting arm assembly 1 is used for installing a scanning disc;

[0039] The spring assembly comprises a tension spring 4, a tension spring rotating shaft 5 and a tension spring rotating plate 6, the tension spring rotating shaft 5 is connected with the anti-collision tension spring plate 2 and the tension spring rotating plate 6, the tension spring rotating plate 6 moves around the tension spring rotating shaft 5, one end of the tension spring 4 is installed on the tension spring rotating plate 6, and the other end is connected with a vehicle frame.

[0040] The torsion frame assembly comprises a sweep plate anti-collision torsion shaft 7, an anti-collision overturning fixed frame 8 and an anti-collision overturning connecting frame 9, one end of the anti-collision overturning fixed frame 8 is fixed with a vehicle frame, the other end is connected with the anti-collision overturning connecting frame 9, the anti-collision overturning connecting frame 9 is installed with the sweep plate anti-collision torsion shaft 7, and the sweep plate anti-collision torsion shaft 7 is installed with a torsion spring 71.

[0041] The combination structure of the torsion spring 71 and the tension spring 4 has the advantages that the anti-collision angle is greatly improved, the cost is reduced, the structure is more compact, and a larger design space is provided for other structures.

[0042] In some embodiments, the anti-collision overturning connecting frame 9 comprises an installation plate 91, upper and lower fixed plates 92 are fixed on the side surface of the installation plate 91, the sweep plate anti-collision torsion shaft 7 is rotatably installed between the fixed plates 92, the fixed plates 92 are provided with torsion spring limiting screws 93, the number of the torsion spring limiting screws 93 is two, the torsion spring limiting screws 93 are installed on the outer side of the torsion arm of the torsion spring 71, and the fixed plates 92 are provided with penetrating fixed holes for the sweep plate anti-collision torsion shaft 7.

[0043] The anti-collision connecting seat 3 is fixed with connecting plates 31, the sweep plate anti-collision torsion shaft 7 is rotatably arranged through the connecting plates 31, the number of the connecting plates 31 is also two, and the connecting plates 31 are installed above the upper fixed plate 92 and below the lower fixed plate 92, respectively, rotate around the sweep plate anti-collision torsion shaft 7, and the thrust type flange graphite copper sleeve 72 is installed at the upper end of the sweep plate anti-collision torsion shaft 7, the connecting plates 31 are connected with the sweep plate anti-collision torsion shaft 7 through the copper sleeve, and the friction force during rotation is reduced; meanwhile, screws for fixing the two ends of the torsion spring 71 are arranged on the connecting plates 31, and the torsion spring 71 is driven to rotate and store energy when the swing arm connecting rod assembly is rotated by collision.

[0044] The torsional spring 71 is in a pre-tightening state after installation, and the torsional spring limiting screw 93 ensures the pre-tightening state of the torsional spring 71, when the scanning disc body is impacted and drives the swing arm connecting rod assembly to swing backward, the screw for fixing the torsional spring 71 moves, drives the fixed arm on one side of the torsional spring 71 to press inward, the torsional spring 71 stores potential energy, and when the impact ends, the torsional spring 71 releases the potential energy, and the swing arm connecting rod assembly resets. The realization of the position maintaining function is mainly derived from the fact that after the pre-tightening of the torsional spring 71, the anti-collision overturning connecting frame 9 and the anti-collision connecting seat 3 maintain a relatively stable state under the action of the torsional moment of the torsional spring 71, even if the swing arm connecting rod assembly temporarily deviates from the original position due to excessive acceleration during overturning, it can also automatically return to the balance position when the acceleration decreases.

[0045] Further, the upper surface of the fixed plate 92 is provided with a limiting shaft sleeve 94, and the limiting shaft sleeve 94 is installed on the side away from the lifting arm assembly 1; the connecting plate 31 is provided with an arc-shaped limiting groove 33 matched with the limiting shaft sleeve 94, and the arc-shaped limiting grooves 33 are symmetrically arranged, and when the swing arm connecting rod assembly rotates forward or backward, the arc-shaped limiting grooves 33 on both sides are in contact with the limiting shaft sleeve 94, so that the swing angle of the swing arm connecting rod assembly is limited, and the swing angle is limited within a certain range, so that the parts are prevented from being damaged due to excessive swing angle.

[0046] In some embodiments, the connecting plate 31 is provided with a proximity switch trigger block 32, the proximity switch trigger block 32 is arranged on both sides of the proximity switch 95, the proximity switch trigger block 32 is fixed on the upper surface of the upper connecting plate 31 by a screw, the proximity switch 95 is arranged on the fixed plate 92 of the anti-collision overturning connecting frame 9 and faces the proximity switch trigger block 32, after being impacted, the connecting plate 31 rotates, the proximity switch trigger block 32 rotates to the upper side of the proximity switch 95, at this time, the proximity switch 95 sends a signal to promote the vehicle to brake in time, so as to avoid damage to the structure, and the position and limiting angle of the proximity switch trigger block 32 have high designability, by changing the position of the proximity switch 95 and the proximity switch trigger block 32, different limiting swing angles and emergency stop trigger angles can be set to meet the needs of different scenes and vehicles. At the same time, a travel switch can be used instead of the proximity switch 95.

[0047] Further, a thrust washer 21 is arranged between the anti-collision tension spring pull plate 2 and the tension spring rotating plate 6.

[0048] The beneficial effects of the above technical solutions are that the thrust washer 21 can effectively reduce the friction between the anti-collision tension spring pull plate 2 and the tension spring rotating plate 6, ensure that the rotation of the swing arm assembly does not drive the rotation of the tension spring rotating plate 6, and the tension spring rotating plate 6 is always directed towards the tension spring 4, the two tension springs 4 arranged side by side do not cross and knot, and the force direction of the tension spring can be kept the same as the axis of the tension spring, thereby effectively prolonging the service life of the tension spring.

[0049] Further, the anti-collision tension spring pull plate 2 is provided with a pull plate limiting block 22 on the side, one end of the pull plate limiting block 22 is connected with the frame, and the other end is provided with a containing groove, and the anti-collision tension spring pull plate 2 extends into the containing groove.

[0050] The beneficial effects of the above technical solutions are that the pull plate limiting block 22 is arranged under the condition that the tension spring 4 has a certain pre-tightening force, that is, when not subjected to collision, the swing arm is always in the middle position instead of swinging outwards.

[0051] In the utility model, the tension spring 4 is the main part for providing anti-collision torque, which mainly uses the anti-collision tension spring pull plate 2 in the swing arm connecting rod assembly to extend the force arm, thereby reducing the requirement for spring stiffness. After installation, the tension spring 4 is in a pre-tightening state, cooperates with the torsional spring 71 to provide an initial anti-collision torque for the sweeping disc body and overcome the friction between the ground and the sweeping disc during normal operation of the sweeping disc, so as to maintain the stability of the swing arm connecting rod assembly during normal operation. When the sweeping disc body is subjected to impact, the sweeping disc drives the swing arm connecting rod assembly to swing backwards around the sweeping disc anti-collision torsion shaft 7, the anti-collision tension spring pull plate 2 swings forwards, pulls the tension spring 4, the tension spring 4 stores potential energy, and when the impact ends, the tension spring 4 releases the potential energy, thereby facilitating the reset of the swing arm connecting rod assembly.

[0052] The differences between the utility model and the traditional front-mounted sweeping disc reversing anti-collision mechanism are as follows:

[0053] 1. The rear swing angle is increased. Since the anti-collision function of the utility model is realized by the torsional spring 71 at the sweeping disc anti-collision torsion shaft 7 and the tension spring 4 at the anti-collision tension spring pull plate 2, there is no traditional structure similar to the compression spring at the sweeping disc anti-collision torsion shaft 7 to limit the rear swing angle in the space position, thereby greatly increasing the rear swing angle of the sweeping disc after being subjected to impact, increasing the passing capacity of the vehicle during the cleaning operation, and greatly reducing the damage probability of the structural parts of the sweeping disc after being subjected to impact;

[0054] 2. Emergency stop braking after being subjected to impact. Since the rear swing angle of the traditional structure is too small, the working vehicle often does not have enough time and space to perform emergency braking after the sweeping disc is subjected to impact, or even if emergency braking is performed, due to the limitation of the braking distance, the structural parts are also likely to be damaged. Since the rear swing angle of the utility model is large, a proximity sensor can be arranged before the sweeping disc swings to the limit position, so that the working vehicle has enough time and space to perform emergency braking, thereby greatly reducing the damage of the parts of the front-mounted sweeping disc.

[0055] 3. Low cost. Because the traditional structure of the anti-collision force arm is small, it leads to higher spring stiffness requirement of the anti-collision compression spring, so most front-mounted sweeping discs use disc springs or rectangular springs, and in order to ensure the durability of the spring, the material requirement is also higher, which leads to higher cost of single compression spring. Because of the complex structure, poor weather resistance and high failure rate, the economy of gas spring is lower than that of traditional disc spring and rectangular spring. The utility model greatly extends the anti-collision force arm by using the structure, so that the spring stiffness requirement of the anti-collision tension spring 4 is reduced, and the torsional spring 71 at the rotating shaft is increased, which further reduces the spring stiffness requirement, so that the cost of single anti-collision spring is greatly reduced. Due to the reduction of spring stiffness, the replacement of spring is more simple, and the labor maintenance cost is reduced.

[0056] For ordinary skilled persons in the art, without departing from the creative concept of the utility model, a number of modifications and improvements can be made, which belong to the protection scope of the utility model.

Claims

1. A front disc scanning and reversing anti-collision mechanism, characterized in that, The utility model relates to a swing arm linkage assembly, comprising: a lifting arm assembly (1), a collision prevention tension spring pull plate (2) and a collision prevention connecting seat (3), the collision prevention connecting seat (3) is installed at one end of the lifting arm assembly (1), the collision prevention tension spring pull plate (2) is connected with the collision prevention connecting seat (3), a tension spring assembly, comprising a tension spring (4), a tension spring rotating shaft (5) and a tension spring rotating plate (6), the tension spring rotating shaft (5) connects the collision prevention tension spring pull plate (2) and the tension spring rotating plate (6), the tension spring rotating plate (6) moves around the tension spring rotating shaft (5), one end of the tension spring (4) is installed on the tension spring rotating plate (6), and the other end is connected with a vehicle frame, a torsion bracket assembly, comprising: a sweep disc collision prevention torsion shaft (7), a collision prevention overturning fixed bracket (8) and a collision prevention overturning connecting bracket (9), one end of the collision prevention overturning fixed bracket (8) is fixed with the vehicle frame, the other end is connected with the collision prevention overturning connecting bracket (9), the collision prevention overturning connecting bracket (9) is installed with the sweep disc collision prevention torsion shaft (7), and the sweep disc collision prevention torsion shaft (7) is installed with a torsion spring (71). The collision prevention overturning connecting bracket (9) comprises a mounting plate (91), the mounting plate (91) is fixed with fixed plates (92) arranged in an up-down mode on the side, the sweep disc collision prevention torsion shaft (7) is rotatably installed between the fixed plates (92), and the fixed plates (92) are provided with torsion spring limiting screws (93). The fixed plate (92) is installed with a limiting shaft sleeve (94). The collision prevention connecting seat (3) is fixed with a connecting plate (31) on the side, and the sweep disc collision prevention torsion shaft (7) is rotatably arranged through the connecting plate (31).

2. The pre-impinging disc commutating anti-collision mechanism according to claim 1, wherein, The connecting plate (31) is installed with a proximity switch trigger block (32), the collision prevention overturning connecting bracket (9) is installed with a proximity switch (95), after being impacted, the proximity switch trigger block (32) is rotated to the upper side of the proximity switch (95).

3. The pre-impinging disc commutating anti-collision mechanism according to claim 2, wherein, The collision prevention tension spring pull plate (2) and the tension spring rotating plate (6) are provided with a thrust washer (21) therebetween.

4. The pre-impinging disc commutating anti-collision mechanism according to claim 3, wherein, The collision prevention tension spring pull plate (2) is provided with a pull plate limiting block (22) on the side, one end of the pull plate limiting block (22) is connected with the vehicle frame, the other end is provided with a containing groove, and the collision prevention tension spring pull plate (2) extends into the containing groove.

5. The pre-impinging disc commutating anti-collision mechanism according to claim 4, wherein, The proximity switch trigger block (32) is arranged on both sides of the proximity switch (95).

6. The pre-impinging disc commutating anti-collision mechanism according to claim 1, wherein, The connecting plate (31) is provided with an arc-shaped limiting groove (33), when the swing arm linkage assembly rotates to the limit position, the arc-shaped limiting groove (33) is in contact with the limiting shaft sleeve (94).

7. The pre-impinging disc commutating anti-collision mechanism according to claim 1, wherein, ​ 8. The pre-impinging disc commutating anti-collision mechanism according to claim 5, wherein, ​ 9. The pre-impingement disc commutation crash mechanism of claim 4, wherein, ​

Images