CN104315107A - Hydraulic drive gearbox - Google Patents

Hydraulic drive gearbox Download PDF

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Publication number
CN104315107A
CN104315107A CN201410551663.2A CN201410551663A CN104315107A CN 104315107 A CN104315107 A CN 104315107A CN 201410551663 A CN201410551663 A CN 201410551663A CN 104315107 A CN104315107 A CN 104315107A
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CN
China
Prior art keywords
valve
assembly
oil
oil pump
gear
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201410551663.2A
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Chinese (zh)
Inventor
金刚强
王冬剑
徐德良
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SHAOXING JINDAO GEAR BOX CO Ltd
Original Assignee
SHAOXING JINDAO GEAR BOX CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by SHAOXING JINDAO GEAR BOX CO Ltd filed Critical SHAOXING JINDAO GEAR BOX CO Ltd
Priority to CN201410551663.2A priority Critical patent/CN104315107A/en
Publication of CN104315107A publication Critical patent/CN104315107A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H47/00Combinations of mechanical gearing with fluid clutches or fluid gearing
    • F16H47/06Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the hydrokinetic type

Abstract

The invention discloses a hydraulic drive gearbox. The hydraulic drive gearbox comprises a gearbox assembly and a retarder drive axle assembly, wherein in a hydraulic system, an oil pump assembly is connected to a lubricant passage by virtue of a main pressure regulating valve, a torque converter and a cooler, and the oil pump assembly is connected to an oil return oil way by virtue of the main pressure regulating valve and an overflow valve; a shift valve is a three-position four-way valve, and a drive clutch and a reverse clutch are respectively connected with two working oil ports of the shift valve; the oil inlet of the shift valve is connected with the oil outlet of an inching valve, and the oil inlet of the inching valve is connected with the oil pump assembly by virtue of a damping hole A; the oil inlet of a buffer valve is connected with the oil outlet of the inching valve, and the oil inlet of a compensation valve is connected with the oil pump assembly by virtue of a damping hole B; the oil outlet of the compensation valve and a control end are respectively connected to the oil outlet of the inching valve. According to the scheme, the compensation oil circuit is additionally arranged, so that the hydraulic impact of the clutch is remitted in a meshing process, and various poor influences brought by clutch pressure reduction due to internal leakage increase caused by seal abrasion of a clutch oil way can be overcome.

Description

A kind of hydraulic transmission gearbox
Technical field
The invention belongs to mechanical power transmission technical field, particularly relate to a kind of a kind of hydraulic transmission gearbox be applied in the engineering machinery such as fork truck, tractor.
Background technique
Publication number be CN203604571U patent document discloses a kind of hydrodynamic drive speed changer with novel hydraulic control system, comprise gearbox, torque-converters assembly and hydraulic control system assembly, described gearbox comprises casing and input shaft, described housing is fixed on casing, cavity is formed between housing and casing, fluid is provided with in cavity, described fluid torque converter is located in housing, input shaft, idler shaft and output shaft is provided with in described casing, the tail end of output shaft stretches out casing, it forms screw, and the second shaft coupling portion of flexible coupling is screwed onto in screw; Described hydraulic control system assembly comprises strainer, oil pump, secondary filter, bypass valve, throttle valve, inching valve, trimmer valve, shift valve, reduction valve, relief valve, torque-converters, cooler, lubrication system and variable throttle valve.In prior art, in clutch engagement process, there is larger hydraulic shock, cause vehicle driving to start to walk vibration greatly, and the internal leakage increase that clutch oil circuit causes because of sealing wear makes clutch pressure reduce institute thus produce various harmful effect.
Summary of the invention
In order to solve above-mentioned technical problem, the object of this invention is to provide a kind of hydraulic transmission gearbox, its hydraulic system increases compensation oil circuit, to alleviate the hydraulic shock of clutch engagement process, improve the stationarity of forklift-walking starting stage, and make up the internal leakage increase that clutch oil circuit causes because of sealing wear and make clutch pressure reduce the various harmful effects brought.
To achieve the above object, present invention employs following technological scheme:
A kind of hydraulic transmission gearbox, comprise transmission assembly and driving axle of speed reducer assembly, realize transmission of power by universal shaft coupling between described transmission assembly and driving axle of speed reducer assembly to connect, described transmission assembly realizes casing with driving axle of speed reducer assembly by elastic support assembly and is connected; Described transmission assembly comprises the gear box casing and converter cover fixed together, in converter cover, torque converter assemblage is set, output gear, output flange, countershaft assembly, input shaft assembly, oil-feed axle sleeve assembly, driving gear, PTO gear and interior pump gear are set in gear box casing, input shaft assembly comprises forward gear clutch, and countershaft assembly comprises reverse clutch; Hydraulic system comprises oil pump assy, torque-converters, cooler, main pressure regulator valve, relief valve, inching valve, trimmer valve, shift valve and recuperation valve, oil pump assy is connected to lubricating oil path through main pressure regulator valve, torque-converters and cooler, and oil pump assy is connected to oil return circuit through main pressure regulator valve and relief valve; Shift valve is three-position four-way valve, forward gear clutch and retrogressing shelves clutch connect two actuator ports of shift valve respectively, the return opening of shift valve connects oil return circuit, the filler opening of shift valve connects the oil outlet of inching valve, the filler opening of inching valve is connected to oil pump assy through damping hole A, the return opening of inching valve connects oil return circuit, the filler opening of trimmer valve connects the oil outlet of inching valve, the filler opening of recuperation valve is connected to oil pump assy through damping hole B, and the oil outlet of recuperation valve and control end are all connected to the oil outlet of inching valve; Oil pump assy is arranged on outside gear box casing, and described oil pump assy comprises oil pump body, oil pump cover, oil pump input shaft, oil pump drive gear, oil pump driven gear, steel ball, spring, plug screw; Oil pump body is foundry goods, be cast with hyperbaric chamber and low-pressure cavity, hyperbaric chamber and low-pressure cavity are separated by oil pump drive gear and oil pump driven gear and then formed pumping chamber and oil suction room in the cavitys that oil pump body and oil pump cover surround, oil pump cover is provided with the passage connecting pumping chamber and oil suction room, the trend that steel ball cuts out this passage given by spring, and one end and the steel ball of spring offset, and the other end and the plug screw of spring offset, plug screw is fixedly connected with oil pump cover, and oil pump input shaft is connected with interior pump gear.
As preferably, described inching valve is three-position three-way valve.
As preferably, described recuperation valve is 2/2-way valve.
As preferably, the two ends of described oil pump assy are connected to filter and secondary filter respectively.
As preferably, described driving axle of speed reducer assembly comprises fixing differential mechanism seat assembly together, differential cover and left and right support, between differential mechanism seat assembly and differential cover, input flange is set, driving gear driven gear and spiral shell umbrella assembly, input flange is in transmission connection by the output flange of universal shaft coupling and transmission assembly, input flange is set with driving gear, driving gear and driven gear engagement driving, driven gear is sleeved on spiral shell umbrella assembly, spiral shell umbrella assembly one end and differential assembly are in transmission connection, differential assembly is arranged between differential mechanism seat assembly and front shroud, the spiral shell umbrella assembly the other end connects locking nut, end cap closes differential cover, in the support of left and right, a semiaxis is all installed, left and right support all installs left and right break and brake hub.
As preferably, described elastic support assembly comprises support, connecting bolt, backing plate and snubber block, described snubber block comprises the metal support ring, metal support cover and the Rubber shock-absorbing pad both connection that socket-connect: metal support ring has the first coaxial sleeve part and the second sleeve part, the internal diameter of the second sleeve part is greater than the internal diameter of the first sleeve part, first sleeve part is connected by collar portion with the second sleeve part, first sleeve part and the second sleeve part are cylindrical shape, and collar portion has ring plain, metal support cover cylindrically, metal support cover is coaxially sheathed with metal support ring, Rubber shock-absorbing pad and both are one-body molded, one end of metal support cover is retracted within the first sleeve part of metal support ring, the other end of metal support cover stretches out outside the second sleeve part of metal support ring, gap is formed between first sleeve part and metal support overlap, one end of Rubber shock-absorbing pad is formed with the first annular recess at this gap location, the other end of Rubber shock-absorbing pad is formed with the second annular recess in the gap of the second sleeve part and metal support cover, the diameter of the second annular recess is greater than the diameter of the first annular recess, wherein, support is fixed on transmission assembly housing, a connecting bolt is fixedly connected with the housing of driving axle of speed reducer assembly through after a backing plate, snubber block, support, another snubber block and another backing plate successively, the metal support ring of two snubber blocks is all fixed with support, the metal support cover of two snubber blocks is each to be fixed with a backing plate, first sleeve part of the metal support ring of two snubber blocks is not from the through hole inserted up and down support, and the collar portion of the metal support ring of two snubber blocks offsets with support respectively.
As preferably, the junction of described first sleeve part and collar portion is formed with ring-type concaveconvex structure, and the second sleeve part edge is formed with flanging.
As preferably, the degree of depth of described first annular recess exceedes collar portion, and the degree of depth of the second annular recess is close to collar portion thus become to interlock with the first ring-type groove type.
The present invention is owing to have employed above technological scheme, increase and compensate oil circuit, when shift valve is in the moment of commutation position, recuperation valve just can return back to normally off, thus just cut off compensation oil circuit, just the hydraulic shock of clutch engagement process can be alleviated, to improve the stationarity of forklift-walking starting stage by the damping increasing damping hole.Once after vehicle gentle start, recuperation valve just automatically switches into normally open, compensate oil circuit and just often open repairing, the internal leakage increase caused because of sealing wear to make up clutch oil circuit makes clutch pressure reduce the various harmful effects brought.Oil pump has pressure versus flow protective gear, and when pressure increases (or flow increase) to certain value, steel ball is automatically opened and kept certain pressure (or flow).
Accompanying drawing explanation
Fig. 1 is the structural representation of hydraulic transmission gearbox of the present invention;
Fig. 2 is the drive mechanism schematic diagram of transmission assembly;
Fig. 3 is the outline drawing of transmission assembly;
Fig. 4 is the drive mechanism schematic diagram of driving axle of speed reducer assembly;
Fig. 5 is asphalt principle figure of the present invention;
Fig. 6 is the explosive view of elastic support assembly;
Fig. 7 is the structural representation of snubber block;
Fig. 8 is the A-A sectional view of Fig. 7;
Fig. 9 is the structural representation of supporting ring;
Figure 10 is the explosive view of oil pump assy.
Embodiment
 
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is made a detailed explanation.
Embodiment 1:
Hydraulic transmission gearbox as shown in Figure 1, comprise transmission assembly 1 and driving axle of speed reducer assembly 6, described transmission assembly 1 realizes casing with driving axle of speed reducer assembly 6 by elastic support assembly and is connected, and realizes transmission of power be connected between described transmission assembly 1 and driving axle of speed reducer assembly 6 by universal shaft coupling 8 with bolt 7.
As shown in Figure 1, elastic support assembly, comprises support 2, connecting bolt 3, backing plate 4 and snubber block 5.As Fig. 7, shown in Fig. 8 and Fig. 9, described snubber block 5 comprises the metal support ring 51 socket-connected, metal support cover 52 and the Rubber shock-absorbing pad 53 both connection: metal support ring 51 has the first sleeve part 511 and the second sleeve part 513 of coaxial line, the internal diameter of the second sleeve part 513 is greater than the internal diameter of the first sleeve part 511, first sleeve part 511 is connected by collar portion 512 with the second sleeve part 513, first sleeve part 511 and the second sleeve part 513 are cylindrical shape, collar portion 512 has ring plain, first sleeve part 511 is formed with ring-type concaveconvex structure 514 with the junction of collar portion 512, second sleeve part 513 edge is formed with flanging 515, metal support cover 52 cylindrically, metal support cover 52 is coaxially sheathed with metal support ring 51, Rubber shock-absorbing pad 53 is one-body molded with both, one end of metal support cover 52 is retracted within the first sleeve part 511 of metal support ring 51, the other end of metal support cover 52 stretches out outside the second sleeve part 513 of metal support ring 51, first sleeve part 511 and metal support are formed with gap between overlapping 52, one end of Rubber shock-absorbing pad 53 is formed with the first annular recess 532 at this gap location, the degree of depth of this first annular recess 532 exceedes collar portion 512, the other end of Rubber shock-absorbing pad 53 is formed with the second annular recess 531 in the gap of the second sleeve part 513 and metal support cover 52, the diameter of the second annular recess 531 is greater than the diameter of the first annular recess 532, the degree of depth of the second annular recess 531 is formed close to collar portion 512 thus with the first annular recess 532 interlocks.As Fig. 1, shown in Fig. 6, during installation, support 2 is bolted on the casing of transmission assembly 1, a connecting bolt 3 is successively through a backing plate 4, a snubber block 5, support 2, another snubber block 5 is fixedly connected with the housing of driving axle of speed reducer assembly 6 with after another backing plate 4, the metal support ring 51 of two snubber blocks 5 is all fixed with support 2, the metal support cover 52 of two snubber blocks 5 is each to be fixed with a backing plate 4, first sleeve part 511 of the metal support ring 51 of two snubber blocks 5 is respectively from the through hole inserted up and down support 2, the collar portion 512 of the metal support ring 51 of two snubber blocks 5 offsets with the top and bottom of support 2 respectively.Such elastic support assembly all has good damping shock-absorbing effect in all directions, easy for installation.
As shown in Figure 2 and Figure 3, transmission assembly 1 comprises the gear box casing 9 and converter cover 12 fixed together, torque converter assemblage 14 is set in converter cover 12, output gear 10, output flange 11, countershaft assembly 13, input shaft assembly 15, oil-feed axle sleeve assembly 16, driving gear 17, PTO gear 18 and interior pump gear 19 are set in gear box casing 9, input shaft assembly 15 comprises forward gear clutch 151, and countershaft assembly 13 comprises reverse clutch 131.Oil pump assy 20 and Electromagnetic Control valve assembly 21 are arranged on outside gear box casing 9.
As shown in Figure 4, driving axle of speed reducer assembly 6 comprises fixing differential mechanism seat assembly 22 together, differential cover 23 and left and right support 31, 36, input flange 24 is set between differential mechanism seat assembly 22 and differential cover 23, driving gear 25, driven gear 26 and spiral shell umbrella assembly 29, input flange 24 is in transmission connection by the output flange 11 of universal shaft coupling 8 with transmission assembly 1, input flange 24 is set with driving gear 25, driving gear 25 and driven gear 26 engagement driving, driven gear 26 is sleeved on spiral shell umbrella assembly 29, spiral shell umbrella assembly 29 one end and differential assembly 30 are in transmission connection, differential assembly 30 is arranged between differential mechanism seat assembly 22 and front shroud 35, spiral shell umbrella assembly 29 the other end connects locking nut 28, end cap 27 closes differential cover 23, left and right support 31, one semiaxis 34 is all installed in 36, left and right support 31, on 36, left and right break 32 is all installed, 37 and brake hub 33.
Fluid torque converter passes through resilient connection plate by engine-driving, drive pump impeller rotates, liquid stream is made to flow into turbine at a high speed along its direction blade, promotion turbine rotates, guide wheel makes torque-converters produce bending moment effect, pass through turbine shaft, moment of torsion is passed to hydraulic transmission gearbox input shaft, when being linked into forward gears, retreat the idle running of shelves clutch, transmission of power order is that input shaft → forward gear clutch → forward gear → output gear → output flange → universal shaft coupling → input flange → driving gear → driven gear → spiral shell umbrella assembly → differential mechanism exports; When being linked into retrogressing shelves, forward gear clutch dallies, and transmission of power order is that input shaft → jack shaft → retrogressing shelves clutch → retrogressing shelves gear → output gear → output flange → Hooks coupling universal coupling → input flange → driving gear → driven gear → spiral shell umbrella assembly → differential mechanism exports.The clutch that moves forward and backward is controlled by electromagnetic power shift control valve.
As shown in Figure 5, the hydraulic system of hydraulic transmission gearbox comprises oil pump assy 20, torque-converters 14, cooler 141, main pressure regulator valve 211, relief valve 212, inching valve 213, trimmer valve 214, shift valve 215 and recuperation valve 216, oil pump assy 20 is connected to lubricating oil path through main pressure regulator valve 211, torque-converters 14 and cooler 141, and oil pump assy 20 is connected to oil return circuit through main pressure regulator valve 211 and relief valve 212, shift valve 215 is three-position four-way valve, forward gear clutch 151 and retrogressing shelves clutch 131 connect two actuator ports of shift valve 215 respectively, the return opening of shift valve 215 connects oil return circuit, the filler opening of shift valve 215 connects the oil outlet of inching valve 213, the filler opening of inching valve 213 is connected to oil pump assy 20 through damping hole A218, the return opening of inching valve 213 connects oil return circuit, the filler opening of trimmer valve 214 connects the oil outlet of inching valve 213, the filler opening of recuperation valve 216 is connected to oil pump assy 20 through damping hole B217, the oil outlet of recuperation valve 216 and control end are all connected to the oil outlet of inching valve 213.Inching valve 213 is three-position three-way valve, and recuperation valve 216 is 2/2-way valve.The two ends of described oil pump assy 20 are connected to filter 201 and secondary filter 202 respectively.Shift valve 215, trimmer valve 214, inching valve 213 etc. are integrated into Electromagnetic Control valve assembly 21.
The working principle of hydraulic transmission gearbox hydraulic system is as follows:
Oil pump provides power oil for hydraulic system.Main pressure regulator valve 211 control system pressure, pressure setting is 0.9 ~ 1.1MPa, and unnecessary hydraulic oil enters lubricating oil path flow through torque-converters 14, cooler 141 after main pressure regulator valve 211 overflow after.Torque-converters oil circuit 0.3 ~ 0.6MPa pressure is controlled by relief valve 212.
As shown in Figure 5, the hydraulic oil that oil pump 20 supplies clutch oil circuit flows through inching valve 213 after damping hole 218 throttling, gives trimmer valve 214 topping up simultaneously; When supercharging pressure (diagram A point pressure) reaches setting pressure, recuperation valve 216 just changes by the normally closed function of diagram energy of often starting shooting into.The hydraulic oil that oil pump 20 supplies clutch oil circuit simultaneously also can flow through through damping hole 217 filler opening (illustrating A point) that the fluid flowed out with inching valve 213 after recuperation valve 216 collaborates to shift valve 215.When current shift valve 215 is in meta, the filler opening of forward gear clutch 151 piston, retrogressing shelves clutch 131 piston is all connected with oil return circuit, and clutch is all in releasing state, and gearbox is neutral state.When shift valve 215 is in the position of left side function, A point oil circuit with retreat that shelves clutch plungers is connected, forward gear clutch piston and oil return circuit connect, retrogressing shelves clutch is in engagement, forward gear clutch is in releasing state, and gearbox is for retreating shelves engagements.When shift valve 215 is in the position of right side function, A point oil circuit and forward gear clutch piston are connected, retreat shelves clutch plunger and oil return circuit is connected.Forward gear clutch is in engagement, retrogressing shelves clutch is in releasing state, and gearbox is forward gears engagement.
The innovation of this hydraulic system is: when shift valve 215 is in the moment of commutation position, the hydraulic oil of A point is when shift valve 215 flows to forward gears (or retreating shelves) clutch and promotes clutch plunger motion, and the pressure of A point oil circuit can be down to below the commutation setup pressure value of recuperation valve 216 instantaneously.Therefore recuperation valve 216 just can return back to normally off in the spool function of this moment, thus has just cut off damping hole 217 supplements fuel feeding compensation oil circuit to A point oil circuit.Just the hydraulic shock of clutch engagement process can be alleviated, to improve the stationarity of forklift-walking starting stage by the damping increasing damping hole 218.Once (when A point pressure rises to more than setting value) recuperation valve 216 just automatically switches into normally open after vehicle gentle start, compensate oil circuit (damping hole 217 oil circuit) and just often open repairing.The internal leakage increase caused because of sealing wear to make up clutch oil circuit makes clutch pressure reduce the various harmful effects brought.
In the present embodiment, oil pump is crescent gear pump, and by motor by pump impeller Direct driver, oil pump provides pressure oil to system, after fluid after fluid torque converter work enters the radiator on vehicle, then enter the movement parts such as gearbox lubrication friction plate, bearing and gear.
Oil pump assy as shown in Figure 10, comprises oil pump body 2001, oil pump cover 2005, oil pump input shaft 2002, oil pump drive gear 2003, oil pump driven gear 2004, steel ball 2006, spring 2007, plug screw 2008.Oil pump body 2001 is foundry goods, be cast with hyperbaric chamber and low-pressure cavity, hyperbaric chamber and low-pressure cavity are separated by oil pump drive gear 2003 and oil pump driven gear 2004 and then form pumping chamber and oil suction room in the cavitys that oil pump body 2001 and oil pump cover 2005 surround, oil pump cover 2005 is provided with the passage connecting pumping chamber and oil suction room, the trend that steel ball 2006 cuts out this passage given by spring 2007, one end and the steel ball 2006 of spring 2007 offset, the other end and the plug screw 2008 of spring 2007 offset, and plug screw 2008 is fixedly connected with oil pump cover 2005.Oil pump assy is arranged on gear box casing, paid by the gear transmission of pump impeller Direct driver on torque-converters, after interior pump drive gear speedup (velocity ratio is 0.8857) power is passed to oil pump drive gear, drive oil pump driven gear to rotate, composition crescent gear pump is to system fuel feeding; This pump has pressure versus flow protective gear, and when pressure increases (or flow increase) to certain value, steel ball is automatically opened and kept certain pressure (or flow).

Claims (8)

1. a hydraulic transmission gearbox, it is characterized in that, comprise transmission assembly (1) and driving axle of speed reducer assembly (6), realize transmission of power by universal shaft coupling (8) between described transmission assembly (1) and driving axle of speed reducer assembly (6) to connect, described transmission assembly (1) realizes casing with driving axle of speed reducer assembly (6) by elastic support assembly and is connected, described transmission assembly (1) comprises the gear box casing (9) and converter cover (12) fixed together, torque converter assemblage (14) is set in converter cover (12), output gear (10) is set in gear box casing (9), output flange (11), countershaft assembly (13), input shaft assembly (15), oil-feed axle sleeve assembly (16), driving gear (17), PTO gear (18) and interior pump gear (19), input shaft assembly (15) comprises forward gear clutch (151), countershaft assembly (13) comprises reverse clutch (131), hydraulic system comprises oil pump assy (20), torque-converters (14), cooler (141), main pressure regulator valve (211), relief valve (212), inching valve (213), trimmer valve (214), shift valve (215) and recuperation valve (216), oil pump assy (20) is connected to lubricating oil path through main pressure regulator valve (211), torque-converters (14) and cooler (141), and oil pump assy (20) is connected to oil return circuit through main pressure regulator valve (211) and relief valve (212), shift valve (215) is three-position four-way valve, forward gear clutch (151) and retrogressing shelves clutch (131) connect two actuator ports of shift valve (215) respectively, the return opening of shift valve (215) connects oil return circuit, the filler opening of shift valve (215) connects the oil outlet of inching valve (213), the filler opening of inching valve (213) is connected to oil pump assy (20) through damping hole A (218), the return opening of inching valve (213) connects oil return circuit, the filler opening of trimmer valve (214) connects the oil outlet of inching valve (213), the filler opening of recuperation valve (216) is connected to oil pump assy (20) through damping hole B (217), the oil outlet of recuperation valve (216) and control end are all connected to the oil outlet of inching valve (213), oil pump assy (20) is arranged on gear box casing (9) outside, and described oil pump assy comprises oil pump body (2001), oil pump cover (2005), oil pump input shaft (2002), oil pump drive gear (2003), oil pump driven gear (2004), steel ball (2006), spring (2007), plug screw (2008), oil pump body (2001) is foundry goods, be cast with hyperbaric chamber and low-pressure cavity, hyperbaric chamber and low-pressure cavity are separated by oil pump drive gear (2003) and oil pump driven gear (2004) and then formed pumping chamber and oil suction room in the cavitys that oil pump body (2001) and oil pump cover (2005) surround, oil pump cover (2005) is provided with the passage connecting pumping chamber and oil suction room, the trend that steel ball (2006) cuts out this passage given by spring (2007), one end and the steel ball (2006) of spring (2007) offset, the other end and the plug screw (2008) of spring (2007) offset, plug screw (2008) is fixedly connected with oil pump cover (2005), oil pump input shaft (2002) is connected with interior pump gear (19).
2. hydraulic transmission gearbox according to claim 1, is characterized in that, described inching valve (213) is three-position three-way valve.
3. hydraulic transmission gearbox according to claim 1, is characterized in that, described recuperation valve (216) is 2/2-way valve.
4. hydraulic transmission gearbox according to claim 1, is characterized in that, the two ends of described oil pump assy (20) are connected to filter (201) and secondary filter (202) respectively.
5. a kind of hydraulic transmission gearbox according to claim 1, it is characterized in that, described driving axle of speed reducer assembly (6) comprises fixing differential mechanism seat assembly (22) together, differential cover (23) and left and right support (31, 36), input flange (24) is set between differential mechanism seat assembly (22) and differential cover (23), driving gear (25, ) driven gear (26) and spiral shell umbrella assembly (29), input flange (24) is in transmission connection by the output flange (11) of universal shaft coupling (8) with transmission assembly (1), input flange (24) is set with driving gear (25), driving gear (25) and driven gear (26) engagement driving, driven gear (26) is sleeved on spiral shell umbrella assembly (29), spiral shell umbrella assembly (29) one end and differential assembly (30) are in transmission connection, differential assembly (30) is arranged between differential mechanism seat assembly (22) and front shroud (35), spiral shell umbrella assembly (29) the other end connects locking nut (28), end cap (27) closes differential cover (23), left and right support (31, 36) semiaxis (34) is all installed in, left and right support (31, 36) on, left and right break (32 is all installed, 37) and brake hub (33).
6. a kind of hydraulic transmission gearbox according to claim 1, is characterized in that, described elastic support assembly comprises support (2), connecting bolt (3), backing plate (4) and snubber block (5), described snubber block (5) comprises the metal support ring (51) socket-connected, metal support cover (52) and the Rubber shock-absorbing pad (53) both connection: metal support ring (51) has coaxial the first sleeve part (511) and the second sleeve part (513), the internal diameter of the second sleeve part (513) is greater than the internal diameter of the first sleeve part (511), first sleeve part (511) is connected by collar portion (512) with the second sleeve part (513), first sleeve part (511) and the second sleeve part (513) are cylindrical shape, collar portion (512) has ring plain, metal support cover (52) cylindrically, metal support cover (52) is coaxially sheathed with metal support ring (51), Rubber shock-absorbing pad (53) is one-body molded with both, one end of metal support cover (52) is retracted within first sleeve part (511) of metal support ring (51), the other end of metal support cover (52) stretches out second sleeve part (513) of metal support ring (51) outward, gap is formed between first sleeve part (511) and metal support cover (52), one end of Rubber shock-absorbing pad (53) is formed with the first annular recess (532) at this gap location, the other end of Rubber shock-absorbing pad (53) is formed with the second annular recess (531) in the gap of the second sleeve part (513) and metal support cover (52), the diameter of the second annular recess (531) is greater than the diameter of the first annular recess (532), wherein, support (2) is fixed on transmission assembly (1) housing, a connecting bolt (3) is successively through a backing plate (4), a snubber block (5), support (2), another snubber block (5) is fixedly connected with the housing of driving axle of speed reducer assembly (6) afterwards with another backing plate (4), the metal support ring (51) of two snubber blocks (5) is all fixed with support (2), the metal support cover (52) of two snubber blocks (5) is each to be fixed with a backing plate (4), first sleeve part (511) of the metal support ring (51) of two snubber blocks (5) is respectively from the through hole inserted up and down support (2), the collar portion (512) of the metal support ring (51) of two snubber blocks (5) offsets with support (2) respectively.
7. a kind of hydraulic transmission gearbox according to claim 6, it is characterized in that, described first sleeve part (511) is formed with ring-type concaveconvex structure (514) with the junction of collar portion (512), and the second sleeve part (513) edge is formed with flanging (515).
8. a kind of hydraulic transmission gearbox according to claim 6, it is characterized in that, the degree of depth of described first annular recess (532) exceedes collar portion (512), and the degree of depth of the second annular recess (531) is formed close to collar portion (512) thus with the first annular recess (532) interlocks.
CN201410551663.2A 2014-10-17 2014-10-17 Hydraulic drive gearbox Pending CN104315107A (en)

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Cited By (5)

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Publication number Priority date Publication date Assignee Title
CN104675967A (en) * 2015-02-09 2015-06-03 绍兴金道齿轮箱有限公司 Electric vehicle and reduction gear box thereof
CN104675972A (en) * 2015-02-09 2015-06-03 绍兴金道齿轮箱有限公司 Electric vehicle, speed reduction box and lubricating structure thereof
CN106224485A (en) * 2016-09-30 2016-12-14 长沙中传变速箱有限公司 Many shift hydraulic transmission gearboxes for engineering truck
CN106382263A (en) * 2016-10-09 2017-02-08 合肥协力液压科技有限公司 Automatic speed changing and inching integrated electro-hydraulic control valve
CN110871677A (en) * 2018-08-30 2020-03-10 本田技研工业株式会社 Hydraulic circuit of vehicle drive device

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CN110871677A (en) * 2018-08-30 2020-03-10 本田技研工业株式会社 Hydraulic circuit of vehicle drive device

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