CN204164332U - Hydraulic transmission gearbox and hydraulic system thereof - Google Patents

Hydraulic transmission gearbox and hydraulic system thereof Download PDF

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Publication number
CN204164332U
CN204164332U CN201420602296.XU CN201420602296U CN204164332U CN 204164332 U CN204164332 U CN 204164332U CN 201420602296 U CN201420602296 U CN 201420602296U CN 204164332 U CN204164332 U CN 204164332U
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China
Prior art keywords
valve
oil
oil pump
inching
clutch
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Application number
CN201420602296.XU
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Chinese (zh)
Inventor
金刚强
王冬剑
徐德良
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Zhejiang Golden Road Polytron Technologies Inc
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SHAOXING JINDAO GEAR BOX CO Ltd
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Publication of CN204164332U publication Critical patent/CN204164332U/en
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Abstract

The utility model discloses a kind of hydraulic transmission gearbox and hydraulic system thereof, 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.This programme increases and compensates oil circuit, to alleviate the hydraulic shock of clutch engagement process, makes up the internal leakage increase that clutch oil circuit causes because of sealing wear and makes clutch pressure reduce the various harmful effects brought.

Description

Hydraulic transmission gearbox and hydraulic system thereof
Technical field
The utility model belongs to mechanical power transmission technical field, particularly relates to a kind ofly being applied to hydraulic transmission gearbox in the engineering machinery such as fork truck, tractor and hydraulic system thereof.
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, one of the purpose of this utility model is to provide a kind of hydraulic system of hydraulic transmission gearbox, increase and compensate 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.
Two of the purpose of this utility model is to provide a kind of hydraulic transmission gearbox, adopts above-mentioned hydraulic system.
To achieve the above object, the utility model have employed following technological scheme:
The hydraulic system of hydraulic transmission gearbox, comprise 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.
As preferably, described inching valve is three-position three-way valve.
As preferably, described recuperation valve is 2/2-way valve.
The two ends of described oil pump assy are connected to filter and secondary filter respectively.
As preferably, 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.
A kind of hydraulic transmission gearbox, comprises hydraulic system as above.
The utility model 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.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model hydraulic transmission gearbox;
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 utility model;
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, embodiment of the present utility model 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, and guide wheel makes torque-converters produce bending moment effect, passes 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 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 (6)

1. the hydraulic system of hydraulic transmission gearbox, it is characterized in that, comprise 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 through main pressure regulator valve (211), torque-converters (14) and cooler (141) are connected to lubricating oil path, 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).
2. the hydraulic system of hydraulic transmission gearbox according to claim 1, is characterized in that, described inching valve (213) is three-position three-way valve.
3. the hydraulic system of hydraulic transmission gearbox according to claim 1, is characterized in that, described recuperation valve (216) is 2/2-way valve.
4. the hydraulic system of 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. the hydraulic system of hydraulic transmission gearbox according to claim 1, it is characterized in that, 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).
6. a hydraulic transmission gearbox, is characterized in that, comprises the hydraulic system according to any one of claim 1 to 5.
CN201420602296.XU 2014-10-17 2014-10-17 Hydraulic transmission gearbox and hydraulic system thereof Active CN204164332U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420602296.XU CN204164332U (en) 2014-10-17 2014-10-17 Hydraulic transmission gearbox and hydraulic system thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420602296.XU CN204164332U (en) 2014-10-17 2014-10-17 Hydraulic transmission gearbox and hydraulic system thereof

Publications (1)

Publication Number Publication Date
CN204164332U true CN204164332U (en) 2015-02-18

Family

ID=52538021

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420602296.XU Active CN204164332U (en) 2014-10-17 2014-10-17 Hydraulic transmission gearbox and hydraulic system thereof

Country Status (1)

Country Link
CN (1) CN204164332U (en)

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CP03 Change of name, title or address

Address after: 312000 Zhongxing Avenue 22, Zhejiang City, Shaoxing province.

Patentee after: Zhejiang Golden Road Polytron Technologies Inc

Address before: 312000 Zhongxing Avenue 22, Shaoxing, Zhejiang.

Patentee before: SHAOXING JINDAO GEAR BOX CO., LTD.

CP03 Change of name, title or address