Brake energy regeneration type electro-hydraulic hybrid drive system and extendable chassis

Abstract

The patent discloses a brake energy regeneration type electro-hydraulic hybrid driving system and an extendable chassis, mainly comprising a novel brake energy-saving pump / motor, a support plate, a chassis base, a support frame and a hydraulic telescopic cylinder; a sliding block I and a sliding block II are installed between the chassis base and the support frame, and a cylinder rod of the hydraulic telescopic cylinder is fixed to a cylinder body support frame through a bolt and a split pin; the novel brake energy-saving pump / motor comprises a pump / motor, a novel electromagnetic clutch and a motor, the pump / motor is connected to the right end of the novel electromagnetic clutch through a flat key I, the motor is connected to the left end of the novel electromagnetic clutch through a flat key II, and the loss and gain of electricity of a two-position two-way electromagnetic valve and an armature body are controlled through a controller, so that various recovery modes of brake energy are realized; when additional torque is required for the whole vehicle, the motor serves as a motor and provides auxiliary power together with an energy accumulator. The technical scheme of the application can effectively improve the energy utilization efficiency of the brake system, can improve the application scene of the chassis, and has practicality and economy.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engineering machinery, in particular to a brake energy regeneration type electro-hydraulic hybrid drive system and an extendable chassis. BACKGROUND

[0002] In the field of engineering machinery, hydraulic systems are widely used in power transmission and control of various mechanical equipment, including hoisting machinery, excavators, loaders, agricultural machinery, etc. In these mechanical equipment, hydraulic motors as the core components of the hydraulic system, undertake the important task of converting hydraulic energy into mechanical energy.

[0003] Traditional hydraulic motors have some problems in practical application. First, since the hydraulic motor often needs to be braked during operation, the traditional braking system has the problem of large energy loss, resulting in low energy utilization efficiency. Second, for some special working conditions or environments, mechanical equipment needs to have the function of an extendable chassis to adapt to different working scenarios and terrain conditions.

[0004] At present, the problem of large energy loss of the hydraulic motor, such as the energy-saving hydraulic motor and engineering transport vehicle disclosed in patent application CN 210240903 U, the inlet channel and the outlet channel connect the hydraulic oil delivery pipe and the output pipe, and the inlet and outlet control of the hydraulic oil is realized through the transverse through channel and the bypass valve core. When working normally, the inlet channel and the outlet channel are independent of each other; when stopping working, the bypass valve core moves to connect the inlet channel and the outlet channel, reducing energy loss. But this energy-saving way can only be in the state of stopping working of the hydraulic motor, the overall energy-saving effect is not high, and the energy recovery during braking is not solved.

[0005] The mainstream method of the extendable chassis at present is a typical representative, such as the telescopic chassis and excavator disclosed in patent application CN 211472677 U, which uses two telescopic oil cylinders coaxially installed on the chassis to realize the infinitely adjustable width of the chassis. But the structure and strength of the chassis will be a problem, when passing through rough and uneven road sections, the quality of the hydraulic telescopic oil cylinder and the sealing of the pipeline will be greatly tested. SUMMARY

[0006] The purpose of the present application is to solve the problem of large energy loss of the hydraulic motor during braking, resulting in low energy utilization efficiency, and at the same time to meet the work in some special working conditions or environments, the present application proposes a brake energy regeneration type electro-hydraulic hybrid drive system and an extendable chassis, which realizes the energy recovery of the hydraulic motor during braking and stores it as electric energy and hydraulic energy, provides auxiliary power for driving, improves the energy utilization efficiency, and at the same time realizes the function of the extendable chassis of the mechanical equipment, which can adapt to different working scenarios and terrain conditions.

[0007] To achieve the above technical purposes and achieve the above technical effects, the technical scheme of the present application is as follows:

[0008] A brake energy regeneration type electro-hydraulic hybrid drive system and an extendable chassis mainly comprises: a new brake energy-saving pump / motor, a support plate, a chassis base, a support frame, a guide rail cover plate and a hydraulic telescopic cylinder, the guide rail cover plate is connected to the chassis base through hexagonal bolts, the sliding block I and the sliding block II are installed between the chassis base and the support frame, the hydraulic telescopic cylinder comprises a cylinder barrel, a cylinder rod and a cylinder body support frame, the cylinder rod is fixed to the cylinder body support frame through a latch and a split pin, the new brake energy-saving pump / motor is connected with a connecting frame and a planetary reducer, the planetary reducer is connected with a wheel through a wheel bolt, and the wheel is provided with a shielding cover.

[0009] The new brake energy-saving pump / motor comprises a pump / motor, a new electromagnetic clutch and a motor.

[0010] The pump / motor comprises a pump cover, an oil distribution disc, a bearing, an oil pan, a piston, a spherical bushing, a fixed plate, a wear-resistant plate, a rotating swash plate, a sealing ring, a main shaft, a housing and a displacement regulator, the main shaft is sequentially sleeved with the bearing, the oil pan and the sealing ring in the axial direction, the pump cover comprises an oil port I and an oil port II, is connected and installed on the housing through a housing screw, and is provided with the oil distribution disc in the middle, the piston is arranged in the oil pan and connected with the spherical bushing, the fixed plate is arranged in the fixed groove outside the spherical bushing, the wear-resistant plate is assembled between the rotating swash plate and the spherical bushing, the rotating swash plate is fixed and the displacement is adjusted through the displacement regulator, the bearing and the oil distribution disc are arranged on the step of the main shaft, and the bearing and the sealing ring are axially positioned through the housing.

[0011] The new electromagnetic clutch comprises a sleeve ring, an armature housing, an armature body, a sleeve, a friction medium, a stop washer, a washer, a pulley, a flat key II, a clutch piece, a rotor, a sleeve body and a flat key I, the sleeve body is axially positioned at the step of the main shaft, power is transmitted through the flat key I, the friction medium is fixed to the sleeve body through an internal hexagonal screw, the armature body is located in the armature housing, the sleeve is arranged in the main shaft, the pulley is connected with the motor through the flat key II, and the clutch piece is arranged between the pulley and the rotor.

[0012] In any of the above technical solutions, further, four new brake energy-saving pumps / motors are used for four-wheel drive and energy saving to achieve the maximum energy-saving effect.

[0013] In any of the above technical solutions, further, the hydraulic telescopic cylinder is symmetrically arranged to realize the extension of the chassis.

[0014] In any of the technical solutions above, further, the support frame is provided with the sliding block I on the upper and lower surfaces and the sliding block II on the left and right surfaces, and the whole is symmetrically arranged on the left and right sides to assist the extension of the chassis.

[0015] In any of the technical solutions above, further, the main shaft of the pump / motor is directly connected to the left end of the novel electromagnetic clutch, and the flat key I is used for connection.

[0016] In any of the technical solutions above, further, the pump / motor is provided with the displacement regulator, which can be used for tilting fixation and angle adjustment of the swash plate to realize the conversion of the pump / motor.

[0017] In any of the technical solutions above, further, the clutch plate is arranged between the pulley and the rotor, and the electromagnetic force is generated by controlling the armature body to be electrified to separate.

[0018] In any of the technical solutions above, further, the sleeve ring is arranged outside the armature shell, and the stop washer is used for axial positioning outside the sleeve ring.

[0019] In any of the technical solutions above, further, the pulley is axially positioned by the washer and the stop washer.

[0020] In any of the technical solutions above, further, the motor is directly connected to the left end of the novel electromagnetic clutch through the flat key II, and the brake torque is transmitted to save energy during braking.

[0021] Compared with the prior art, the brake energy regenerative type electro-hydraulic hybrid driving system and the extendable chassis adopt four novel brake energy-saving pumps / motors to drive the whole vehicle chassis, use the hydraulic telescopic cylinder and the sliding block structure to realize the extension of the whole vehicle chassis, enhance the strength and feasibility of the structure, realize the application in various scenes and terrain conditions, design the novel brake energy-saving pump / motor, connect the motor and the main shaft to the two ends of the novel electromagnetic clutch, recover energy in multiple ways during braking, and maximize energy recovery. The present application provides a detailed structure of the brake energy regenerative type electro-hydraulic hybrid driving system and the extendable chassis, and has a detailed description of the internal structure and a specific embodiment description, which can be applied to various industrial and transportation fields, improves the energy recovery during vehicle braking, and improves the energy utilization efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The figure is a structural schematic diagram of the brake energy regenerative type electro-hydraulic hybrid driving system and the extendable chassis.

[0023] Figure 2The oblique axial view of the new brake energy-saving pump / motor and the wheel connection of the present application is shown in the figure.

[0024] Figure 3 The internal assembly view of the support frame and the sliding block of the present application is shown in the figure.

[0025] Figure 4 The internal structure view of the new brake energy-saving pump / motor of the present application is shown in the figure.

[0026] Figure 5 The oblique axial view of the new brake energy-saving pump / motor of the present application is shown in the figure.

[0027] Figure 6 The principle view of the energy recovery of the present application is shown in the figure.

[0028] The meanings of the marks in the figures are as follows:

[0029] 1. The new brake energy-saving pump / motor; 2. The connection frame; 3. The planetary reducer; 4. The cover; 5. The wheel; 6. The support plate; 7. The chassis base; 8. The support frame; 9. The guide rail cover plate; 10. The hexagonal bolt; 11. The sliding block I; 12. The sliding block II; 13. The cylinder barrel; 14. The cylinder rod; 15. The split pin; 16. The latch; 17. The cylinder body support frame; 18. The hydraulic telescopic cylinder; 19. The wheel bolt; 20. The oil port I; 21. The pump cover; 22. The main shaft; 23. The bearing; 24. The oil pan; 25. The piston; 26. The spherical bushing; 27. The fixed plate; 28. The wear plate; 29. The swash plate; 31. The sealing ring; 32. The main shaft; 33. The housing; 34. The oil port II; 35. The stop washer; 36. The sleeve ring; 37. The armature housing; 38. The armature body; 39. The sleeve; 40. The inner hexagonal screw; 41. The friction medium; 42. The stop washer; 43. The washer; 44. The pulley; 45. The flat key II; 46. The clutch piece; 47. The rotor; 48. The sleeve body; 49. The flat key I; 51. The new electromagnetic clutch; 52. The screw; 53. The displacement adjuster; 54. The pump / motor; 55. The motor; 56. The two-position two-way electromagnetic valve I; 57. The two-position two-way electromagnetic valve II; 58. The two-position two-way electromagnetic valve III; 59. The accumulator; 60. The controller. DETAILED DESCRIPTION

[0030] The technical solutions of the present application are described in further detail below in combination with the figures and specific examples, so that the skilled in the art can better understand the present application and implement it. It should be noted that the examples of the present application and the features in the examples can be combined with each other without conflict, and the examples are not limiting to the present application.

[0031] As Figure 1As shown, in order to facilitate the observation of internal structure, the upper chassis seat 7 and the right slider I 11 and slider II 12 are hidden, a brake regenerative type electro-hydraulic hybrid drive system and extendable chassis mainly includes a new type of brake energy saving pump / motor 1, support plate 6, chassis seat 7, support frame 8, guide rail cover plate 9, hydraulic telescopic cylinder 18; the guide rail cover plate 9 is connected to the chassis seat 7 through the hexagonal bolt 10, the slider I 11 and the slider II 12 are installed between the chassis seat 7 and the support frame 8, the hydraulic telescopic cylinder 18 includes cylinder 13, cylinder rod 14, cylinder body support frame 17, the hydraulic telescopic cylinder 18 adopts symmetrical arrangement, the cylinder rod 14 is fixed to the cylinder body support frame 17 through the bolt 16 and the split pin 15, the new type of brake energy saving pump / motor 1 is connected with the connecting frame 14 and the planetary reducer 3, the planetary reducer 3 is connected with the wheel 5 through the wheel bolt 19, the wheel has the shielding cover 4, four new type brake energy saving pump / motors 1 are used for four-wheel drive and energy saving, and the maximum energy saving effect is achieved.

[0032] As shown in the figure, Figure 2 The new type of brake energy saving pump / motor 1 is connected with the planetary reducer 3, and the planetary reducer 3 is connected with the wheel 5 through the wheel bolt 19.

[0033] As shown in the figure, Figure 3 The support frame 8 is installed in the chassis seat 7, the slider I 11 is arranged on the upper and lower surfaces of the support frame 8, the slider II 12 is arranged on the left and right surfaces of the support frame 8, and the whole is symmetrically arranged on the left and right sides to assist the extension of the chassis.

[0034] As shown in the figure, Figure 4As shown, the new brake energy-saving pump / motor 1 includes pump / motor 54, new electromagnetic clutch 51, motor 55, the pump / motor 54 includes pump cover 21, oil distribution disc 22, bearing 23, oil pan 24, piston 25, spherical bushing 26, fixed plate 27, wear plate 28, rotating swash plate 29, sealing ring 31, main shaft 32, housing 33, displacement regulator 53, the main shaft 32 is sequentially sleeved with the bearing 23, the oil pan 24, the sealing ring 31 in the axial direction, the pump cover 21 includes oil port I 20, oil port II 34, and is equipped with the oil distribution disc 22 in the middle of the housing 33, the piston 25 is installed inside the oil pan 24, connected with the spherical bushing 26, the fixed plate 27 is installed in the positioning groove outside the spherical bushing 26, the wear plate 28 is assembled between the rotating swash plate 29 and the spherical bushing 26, the bearing 23 and the oil distribution disc 22 are installed on the step of the main shaft 33, the bearing 23 and the sealing ring 31 are axially positioned by the housing 33; The new electromagnetic clutch 51 includes sleeve ring 36, armature housing 37, armature body 38, sleeve 39, friction medium 41, stop washer 42, washer 43, pulley 44, flat key II 45, clutch plate 46, rotor 47, sleeve 48, flat key I 49, the sleeve 36 is located at the step of the main shaft 32 for axial positioning, and the power is transmitted through the flat key I 49, the friction medium 41 is fixed to the sleeve 48 by using the internal hexagonal screw 40, the armature body 38 is located inside the armature housing 37, the armature housing 37 is provided with the sleeve 39 in the main shaft 32, the pulley 44 connects the motor 55 through the flat key II 45, and the pulley 44 is provided with the clutch plate 46 between the rotor 47.

[0035] As shown in the figure, Figure 5 The pump / motor 54, the new electromagnetic clutch 51 and the motor 55 are on the same axis, the main shaft 32 of the pump / motor 54 and the right end of the new electromagnetic clutch 51 are connected through the flat key I 49, the left end of the new electromagnetic clutch 51 and the motor 55 are connected through the flat key II 45, the pump cover 21 is connected and installed on the housing 33 by using the housing screw 52, and the rotating swash plate 29 is fixed and adjusted by the displacement regulator 53.

[0036] As shown in the figure, Figure 6 In order to facilitate simple observation, only the principle diagram of one of the new brake energy-saving pump / motors 1 is expressed, when the vehicle brakes, the on-off state of two-position two-way electromagnetic valve I 56, two-position two-way electromagnetic valve II 57 and two-position two-way electromagnetic valve III 58 is controlled by controller 60, and the armature body 38 of the new electromagnetic clutch 51 is powered on or off, thereby realizing three brake modes and auxiliary driving mode.

[0037] The specific working principle of the present application is described as follows:

[0038] When working, if the chassis needs to be stretched, the operator can control the input of hydraulic oil through the joystick to control the pushing length of the cylinder rod 14 of the symmetrically arranged hydraulic telescopic cylinder 18, and at the same time, the sliding blocks I 11 and II 12 arranged on the support frame 8 slide up and down, and the hydraulic telescopic cylinders 18 are symmetrically arranged on the left and right sides, thereby achieving auxiliary stretching of the chassis.

[0039] When the whole vehicle is braking, the pump / motor 54 is in the state of hydraulic pump at this time, and the energy recovery can be divided into three modes:

[0040] 1. Energy saving of the motor 55: when the whole vehicle is braking, the braking energy generated by the wheels is converted into high-pressure hydraulic energy through the pump / motor 54, and the power is transmitted from the main shaft 32 to the right end of the new electromagnetic clutch 51 through the flat key I 49. When long-distance braking is performed, the controller 60 supplies power to the two-position two-way electromagnetic valve I 56 at this time, and the two-position two-way electromagnetic valves II 57 and III 58 are in the closed state, so that the oil port I (20) and the oil port II (34) are directly connected for no-load processing, and the armature body 38 is powered on. The rotor 47 and the friction medium 41 move to the right under the action of electromagnetic force, so that the entire new electromagnetic clutch 51 becomes an integral part and rotates. The left end of the new electromagnetic clutch 51 is connected to the motor 55 through the flat key II 45 to transmit the rotary torque, and the motor 55 is driven as a generator to generate electricity and recover the braking energy;

[0041] 2. Energy saving of the motor 55 and the accumulator 59: the controller 60 supplies power to the two-position two-way electromagnetic valve II 57, and the two-position two-way electromagnetic valves I 56 and III 58 are in the closed state. The accumulator 59 first accumulates energy, and the braking energy is stored in the accumulator 59 to realize energy recovery. When the accumulator is full of energy, the controller 60 supplies power to the two-position two-way electromagnetic valve I 56 at this time, and the two-position two-way electromagnetic valves II 57 and III 58 are in the closed state, and the armature body 38 is powered on. The remaining energy is converted into electrical energy by the generator 55;

[0042] 3. Energy saving of the accumulator 59: when short-distance or instantaneous braking is performed, the controller 60 supplies power to the two-position two-way electromagnetic valve II 57, and the two-position two-way electromagnetic valves I 56 and III 58 are in the closed state. The armature body 38 loses power, and the right end of the new electromagnetic clutch 51 rotates as a whole with the main shaft 32. The braking energy is completely converted into hydraulic energy until it is full.

[0043] When the whole vehicle is driven, the pump / motor 54 is in the hydraulic motor state at this time, when the whole vehicle needs additional torque, the motor 55 and the accumulator 59 can jointly assist driving, the energy of the accumulator 59 is preferentially released, the controller 60 energizes the two-position two-way electromagnetic valve II 58, the two-position two-way electromagnetic valve I 56 and the two-position two-way electromagnetic valve III 57 are in the closed state, the accumulator 59 releases the recovered hydraulic energy to provide auxiliary power; the controller 60 can also energize the armature body 38, the motor 55 acts as a motor, and is transmitted to the main shaft 32 through the new electromagnetic clutch 51, and finally connects the wheels 4 to provide auxiliary power.

[0044] The technical scheme of the present application is described in detail above in combination with the drawings. The present application provides a brake energy regeneration type electro-hydraulic hybrid drive system and an extendable chassis. Through the technical scheme in the present application, the whole vehicle chassis adopts four-wheel drive, uses hydraulic telescopic cylinders and slider structures, realizes the extension of the whole vehicle chassis, and realizes the application of various scenes and terrain conditions, and a new type of brake energy-saving pump / motor is designed. The two ends of the new electromagnetic clutch are connected with the motor and the main shaft respectively, the brake energy is recovered in multiple ways during braking, and the motor and the accumulator can provide auxiliary power during driving.

[0045] The above only describes the preferred embodiments of the present application, and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application is included in the protection scope of the present application.

Claims

1. A regenerative braking electro-hydraulic hybrid drive system, comprising: The new type of brake energy-saving pump (1), support plate (6), chassis base (7), support frame (8), guide rail sealing plate (9) and hydraulic telescopic cylinder (18) are provided. The guide rail sealing plate (9) is connected to the chassis base (7) by hexagonal bolts (10). Slider I (11) and slider II (12) are installed between the chassis base (7) and the support frame (8). The hydraulic telescopic cylinder (18) includes cylinder barrel (13), cylinder rod (14) and cylinder support frame (17). The cylinder rod (14) is fixed to the cylinder support frame (17) by pin (16) and cotter pin (15). The new type of brake energy-saving pump (1) is connected to the connecting frame and planetary reducer (3). The planetary reducer (3) is connected to the wheel (5) by wheel bolts (19). The wheel has a cover (4). The novel brake energy-saving pump (1) is characterized by comprising a pump / motor (54), a novel electromagnetic clutch (51), and a motor (55). The pump / motor (54) includes a pump cover (21), an oil distribution plate (22), a bearing (23), an oil pan (24), a piston (25), a spherical bushing (26), a fixing plate (27), a wear-resistant plate (28), a rotating swashplate (29), a sealing ring (31), a main shaft (32), a housing (33), and a displacement adjuster (53). The bearing (23), the oil pan (24), and the sealing ring (31) are sequentially fitted onto the main shaft (32) along the axial direction. The pump cover (21) includes oil port I (20) and oil port II (34), and is connected and installed on the housing (33) by housing screws (52). The oil distribution plate (22) is installed in the middle, the piston (25) is installed inside the oil plate (24) and connected to the spherical bushing (26), the fixing plate (27) is installed in the fixing groove on the outside of the spherical bushing (26), the wear-resistant plate (28) is assembled between the rotating swashplate (29) and the spherical bushing (26), the rotating swashplate (29) is fixed and the displacement is adjusted by the displacement adjuster (53), the bearing (23) and the oil distribution plate (22) are installed on the steps of the main shaft (32), and the bearing (23) and the sealing ring (31) are axially positioned by the housing (33); The novel electromagnetic clutch (51) includes a collar (36), an armature housing (37), an armature body (38), a sleeve (39), a friction medium (41), a stop washer (42), a washer (43), a pulley (44), a parallel key II (45), a clutch plate (46), a rotor (47), a sleeve (48), and a parallel key I (49). The sleeve (48) is axially positioned at the step of the main shaft (32) and transmits power through the parallel key I (49). The friction medium (41) is fixed to the sleeve (48) with an internal hexagon screw (40). The armature body (38) is located inside the armature housing (37). The sleeve (39) is provided in the armature housing (37) and the main shaft (32). The pulley (44) is connected to the motor (55) through the parallel key II (45). The clutch plate (46) is provided between the pulley (44) and the rotor (47).

2. The regenerative braking electro-hydraulic hybrid drive system according to claim 1, characterized in that: Four new type of brake energy-saving pumps (1) are used for four-wheel drive and energy saving.

3. The regenerative braking electro-hydraulic hybrid drive system according to claim 1, characterized in that: The hydraulic telescopic cylinder (18) is arranged symmetrically to achieve chassis extension.

4. The regenerative braking electro-hydraulic hybrid drive system according to claim 1, characterized in that: The support frame (8) is provided with slider I (11) on the upper and lower sides and slider II (12) on the left and right sides. The whole frame is symmetrically arranged on the left and right sides to assist the chassis extension.

5. The regenerative braking electro-hydraulic hybrid drive system according to claim 1, characterized in that: The main shaft (32) of the pump / motor (54) is directly connected to the left end of the novel electromagnetic clutch (51) using the flat key I (49).

6. The regenerative braking electro-hydraulic hybrid drive system according to claim 1, characterized in that: The pump / motor (54) is equipped with the displacement adjuster (53), which can tilt and fix the rotating swashplate (29) and adjust its angle to realize displacement conversion.

7. The regenerative braking electro-hydraulic hybrid drive system according to claim 1, characterized in that: The clutch plate (46) is provided between the pulley (44) and the rotor (47), and the clutch plate (46) is separated by controlling the armature body (38) to generate electromagnetic force.

8. The regenerative braking electro-hydraulic hybrid drive system according to claim 1, characterized in that: The armature housing (37) is provided with the collar (36), and the collar (36) is axially positioned by a retaining washer (35).

9. The regenerative braking electro-hydraulic hybrid drive system according to claim 1, characterized in that: The pulley (44) is axially positioned by the washer (43) and the stop washer (42).

10. A regenerative braking electro-hydraulic hybrid drive system according to claim 1, characterized in that: The motor (55) and the left end of the new electromagnetic clutch (51) are directly connected through the flat key II (45), and the motor transmits braking torque to save energy during braking.

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