WO2012132698A1 - 電動フォークリフト - Google Patents
電動フォークリフト Download PDFInfo
- Publication number
- WO2012132698A1 WO2012132698A1 PCT/JP2012/054712 JP2012054712W WO2012132698A1 WO 2012132698 A1 WO2012132698 A1 WO 2012132698A1 JP 2012054712 W JP2012054712 W JP 2012054712W WO 2012132698 A1 WO2012132698 A1 WO 2012132698A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- shaft
- vehicle body
- body frame
- gear
- electric forklift
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/07509—Braking
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B27/00—Hubs
- B60B27/0015—Hubs for driven wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
- B60B35/12—Torque-transmitting axles
- B60B35/16—Axle housings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
- B60K17/16—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing
- B60K17/165—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing provided between independent half axles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
- B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
- B60T1/06—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels
- B60T1/062—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels acting on transmission parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/07572—Propulsion arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/07586—Suspension or mounting of wheels on chassis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K2001/001—Arrangement or mounting of electrical propulsion units one motor mounted on a propulsion axle for rotating right and left wheels of this axle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/60—Industrial applications, e.g. pipe inspection vehicles
- B60Y2200/62—Conveyors, floor conveyors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/80—Other vehicles not covered by groups B60Y2200/10 - B60Y2200/60
- B60Y2200/83—Perambulators; Buggies; Strollers
Definitions
- the present invention relates to an electric forklift traveling by driving of an electric motor, and in particular, to support a unit case having a gear accommodating portion for accommodating a gear train and a shaft accommodating portion for accommodating a drive shaft on a vehicle body frame. Relates to the structure of
- the unit case D is supported by the vehicle body frame C by connecting the support member B to the vehicle body frame C after the support members B are rotatably fitted to the shaft accommodating portions A, respectively.
- a columnar connection portion F is provided so as to protrude toward the gear housing portion E.
- the connecting portion F is a relative rotation between the unit case D and the body frame C with respect to the axis of the drive shaft J by fastening a bolt H between the connecting portion F and the reaction force receiving portion G of the gear accommodating portion E.
- the connecting portion F provided on the supporting member B is fastened to the gear housing portion E, the distance from the axial center of the drive shaft J to the connecting portion F is limited to the size of the supporting member B. Be done. For this reason, in order to resist the rotational reaction force when the drive shaft J rotates, the strength of the connecting portion F must be set large, which results in an increase in weight of the unit case D.
- the connecting portion F is provided by setting the distance from the axial center of the drive shaft J large, it is possible to reduce the strength setting of the connecting portion F and reduce the weight.
- the position of the connecting portion F is provided at a large distance from the axis of the drive shaft J, the size of the support member B is increased, and the weight of the entire vehicle body is increased.
- An object of the present invention is to provide an electric forklift that can support a unit case on a vehicle body frame while suppressing an increase in weight of the entire vehicle body.
- the electric forklift supports the electric motor with the output shaft facing in the left and right direction, and further includes a gear housing portion housing a gear train inside, and left and right from the gear housing portion. And a pair of shaft receiving portions rotatably supporting the drive shaft in the respective portions and rotatably supporting the wheel through the bearings to constitute a unit case, the electric motor being driven.
- an electric forklift including a drive unit adapted to rotate each drive shaft via the gear train, a pair of support members whose proximal end portions are rotatably fitted to the outer peripheral portion of the shaft accommodation portion
- a pair of support members whose proximal end portions are rotatably fitted to the outer peripheral portion of the shaft accommodation portion
- the connecting portion may be separated from the gear accommodating portion at a position which is outer than a supporting position of the support member and the vehicle body frame centering on an axial center of the drive shaft It is characterized in that it projects toward the vehicle body frame and is connected to the vehicle body frame via a projecting end face.
- a brake unit acting on the hub is disposed between the hub connected to the drive shaft and the outer peripheral portion of the shaft receiving portion, and a base of the support member is provided.
- the brake unit is supported at an end portion.
- connection portion is disposed between the support members, and the rotation of the support member with respect to the shaft storage portion is restricted by abutting on the connection portion. It is characterized in that a regulation surface is provided.
- a pair of restricting portions are provided so as to protrude outward from the tip end portion of the support member around the axial center of the drive shaft, It abuts on the connecting portion via
- the connecting portion for restricting the relative rotation between the gear housing portion and the vehicle body frame is provided. Therefore, the position of the connection portion is not limited by the support member, and the connection portion can be provided at a position where a large distance is secured from the axis of the drive shaft without enlarging the dimensions of the support member. There is no need to increase the thickness of the part. As a result, the unit case can be supported by the vehicle body frame without increasing the weight of the entire vehicle body.
- FIG. 1 is a cross-sectional view of an essential part of an electric forklift according to a first embodiment of the present invention as viewed from above.
- FIG. 2 is a skeleton diagram showing the main parts of the electric forklift shown in FIG.
- FIG. 3 is a perspective view of the main part showing the appearance of the main part of the electric forklift shown in FIG.
- FIG. 4 is a side view of the electric forklift shown in FIG.
- FIG. 5 is a side view showing the appearance of the drive unit of the electric forklift shown in FIG.
- FIG. 6 is a perspective view of a support member applied to the drive unit of the electric forklift shown in FIG.
- FIG. 1 is a cross-sectional view of an essential part of an electric forklift according to a first embodiment of the present invention as viewed from above.
- FIG. 2 is a skeleton diagram showing the main parts of the electric forklift shown in FIG.
- FIG. 3 is a perspective view of the main part showing the appearance of
- FIG. 7 is a perspective view showing a gear accommodating portion of a unit case applied to the drive unit of the electric forklift shown in FIG.
- FIG. 8 is a cross-sectional view of the main part of the electric forklift illustrated for comparison with the electric forklift of the first embodiment shown in FIG. 1 as viewed from above.
- FIG. 9 is a skeleton diagram showing the main parts of an electric forklift according to a second embodiment of the present invention.
- FIG. 10 shows a prior art.
- FIGS. 1 to 3 show the main part of an electric forklift according to a first embodiment of the present invention.
- the electric forklift illustrated here travels with the front wheel FW as a drive wheel and the rear wheel RW as a steered wheel as shown in FIG. 4 and as shown in FIGS. 1 and 2, the front of the vehicle body frame BF
- a unit case 10 of the drive unit 1 is provided at a position between the front wheels FW.
- the unit case 10 has a gear housing portion 11 provided between the front wheels FW, and a pair of shaft housing portions 12 protruding leftward and rightward from the gear housing portion 11.
- the gear housing portion 11 is configured by joining the left and right two case elements 11a and 11b to each other, and the inside is hollow.
- the shaft accommodating portion 12 has a cylindrical shape in which both ends are opened, and the shaft accommodating portion 12 is attached to both end portions of the gear accommodating portion 11 in a state where each interior communicates with the inside of the gear accommodating portion 11.
- the unit case 10 supports the electric motor 120 in the gear housing 11, and rotatably supports the front wheel FW in the pair of shaft housings 12 via the hubs 14.
- the electric motor 120 is attached to the side surface of the gear housing 11 with the output shaft 121 oriented in the left-right direction and with the tip of the output shaft 121 facing the inside of the gear housing 11.
- the hub 14 is supported on the outer peripheral portion of the shaft accommodating portion 12 via hub bearings 14a and 14b, and can rotate with respect to the shaft accommodating portion 12 about the axial center of each shaft accommodating portion 12 It is.
- a front wheel FW is removably attached to each hub 14 via a hub bolt 16.
- a drive shaft 18 is accommodated in each of the shaft accommodating portions 12 of the unit case 10, and a gear train 30 is accommodated in the gear accommodating portion 11.
- the drive shaft 18 is an axial member having a circular cross section, and is rotatably disposed in the shaft receiving portion 12 with the axes aligned with each other.
- the proximal end portion of the drive shaft 18 is disposed to face the inside of the gear housing 11 and is provided with a driven gear 131 at each proximal end portion.
- the driven gear 131 constitutes a side gear of the differential gear 130 described later, and is fixed to each drive shaft 18.
- the distal end portion of the drive shaft 18 has a disk shape having a large diameter and a portion protruding outward from the shaft accommodation portion 12, and is fixed to the end surface of the hub 14 by a shaft attachment bolt 20.
- the gear train 30 transmits the rotation of the output shaft 121 when the electric motor 120 is driven to the left and right drive shafts 18.
- the gear train 30 is configured by including the drive gear 31, the differential gear 130, and the two idle gears 32, 33.
- the drive gear 31 is a spur gear fixed to the output shaft 121 of the electric motor 120.
- the differential gear 130 includes a pair of side gears, a pinion gear 132 meshing with each of the side gears, a gear frame 134 supporting a shaft 133 of the pinion gear 132, and a ring gear 135 attached to the gear frame 134 as in the conventional one.
- the driven gear 131 provided at the base end of the drive shaft 18 is configured as a side gear.
- the two idle gears 32 and 33 are spur gears provided on the same idle shaft 34 and are configured to have different outer diameters.
- the idle shaft 34 is in parallel with the output shaft 121 of the electric motor 120 with the large diameter idle gear 32 meshing with the drive gear 31 and the small diameter idle gear 33 meshing with the ring gear 135 of the differential gear 130. It is rotatably supported by the gear accommodating portion 11 in the following state.
- the drive unit 1 when the electric motor 120 is driven, the rotation of the output shaft 121 is transmitted to each drive shaft 18 via the drive gear 31, the two idle gears 32 and 33, and the differential gear 130, and the drive shaft 18 By rotating around each axis, the front wheel FW is rotated via the hub 14.
- the unit case 10 of the drive unit 1 is supported by the vehicle body frame BF via the support members 41 and 42 disposed in the respective shaft accommodation portions 12 and one side of the gear accommodation portion 11 and the body frame BF The portions are connected to each other by a connecting portion 43.
- the support members 41 and 42 are high rigidity members having fitting holes 41a and 42a at the base end and fastening connections 41b and 42b to the vehicle body frame BF at the tip. .
- the respective support members 41 and 42 are provided on the outer peripheral portion of the shaft accommodation portion 12 in such a manner that they rotate around the axial center of the shaft accommodation portion 12 by fitting the shaft accommodation portion 12 in the fitting holes 41a and 42a. is there.
- the front end portions of the support members 41 and 42 are fixed to the vehicle body frame BF by means of frame attachment bolts 141 and 142 via fastening connection portions 41 b and 42 b, as shown in FIG.
- the outer diameters of the portions of the support members 41 and 42 fitted in the fitting holes 41a and 42a are formed to have the same outer diameter. For this reason, while being able to manufacture the shaft accommodating part 12 on either side as common components, the support members 41 and 42 can be manufactured as common components. Therefore, it is possible to reduce the number of parts and to reduce the manufacturing cost.
- a brake unit 50 is configured between the proximal ends of the support members 41 and 42 and the hub 14.
- the brake unit 50 applies a brake to the rotation of the hub 14 with respect to the shaft accommodation portion 12 by pressing a brake lining (not shown) against the hub 14, and the proximal ends of the support members 41 and 42 by the brake mounting bolt 51. It is supported by the department.
- the connecting portion 43 is a columnar portion protruding from the gear accommodating portion 11 as shown in FIGS. 5 and 7, and the connecting bolt 143 (FIG. 1) is in a state where its front end surface is in contact with the vehicle body frame BF. It is fixed to the body frame BF.
- the position where the connecting portion 43 is provided is a position located on the outer peripheral side of the tip surface of the support member 41 when the axial center of the drive shaft 18 is centered.
- the position where the connection bolt 143 is screwed in the connection portion 43 is also set to be on the outer peripheral side than the position where the frame attachment bolt 141 is screwed in the fastening connection portion 41b.
- one support member 41 is provided with a pair of restricting portions 41 c at its tip.
- the restricting portions 41 c are radially protruding from the tip end portion of the support member 41 toward the outer peripheral direction centering on the axial center of the drive shaft, and the connecting portions 43 are disposed between each other. These restricting portions 41c can abut on the connecting portion 43 via the restricting surfaces 41d positioned inward to each other.
- the mutual distance between the control surfaces 41 d is larger than that of the connection portion 43 so that one of the control surfaces 41 d abuts on the connection portion 43.
- the gear housing portion 11 is provided with the connecting portion 43 at a position separated from the axial center of the drive shaft 18, and the gear housing portion 11 is Since it is connected to the vehicle body frame BF, the connection portion 43 can receive the rotational reaction force when the front wheel FW accelerates / decelerates by the drive of the electric motor 120.
- the position at which the connecting portion 43 is provided is not limited by the support member 41 and can be set to a position on the outer peripheral side of the support member 41 with respect to the axial center of the drive shaft 18. As a result, a large rotational reaction force can be received without securing large rigidity in the connecting portion 43, and weight reduction of the unit case 10 can be achieved.
- the external force applied from the ground via the front wheel FW is transmitted to the vehicle body frame BF via the hub 14, the hub bearings 14a and 14b, the shaft accommodation portion 12, and the support members 41 and 42, and the external force Is not likely to be added to the gear accommodating portion 11 of the unit case 10. Therefore, even when the gear housing 11 is thin, there is no risk of deformation of the gear housing 11 due to external force applied from the ground, and various problems caused by the deformation of the gear housing 11 are prevented. Thus, the weight of the drive unit 1 can be reduced. Specifically, there is no risk of deformation even when the gear housing portion 11 is thin-walled, and the drive shaft 18 and the idle shaft 34 rotate in parallel with each other and rotate. No abnormal noise, loss or abnormal wear caused by
- FIG. 8 shows an electric forklift illustrated for comparison with the electric forklift of the first embodiment.
- the electric forklift according to the comparative example is different from that according to the first embodiment only in that the support member 41 for supporting the shaft accommodation portion 12 on the vehicle body frame BF is omitted. It is.
- the same reference numerals as in the first embodiment denote the same parts in this comparative example.
- the rotational reaction force in the case where the front wheel FW accelerates or decelerates by the driving of the electric motor 120 is received only by the connecting portion 43. Therefore, when the distance from the axial center of the drive shaft 18 to the connecting portion 43 is the same, the strength of the connecting portion 43 needs to be set larger than that of the first embodiment, for example, by the cross hatch in FIG. As shown, it is necessary to ensure a large plate thickness of the portion where the connecting portion 43 is provided in the gear housing portion 11.
- the comparative example requires a weight of 260 kg, while In the case of Form 1, it was possible to constitute 217 kg (weight ratio -17%).
- the regulation part 41c is provided in one support member 41, and the regulation surface 41d located on the inner side of each regulation part 41c is arranged to abut on the connecting part 43, as shown below, The work in assembling the drive unit 1 can be facilitated.
- the hub 14 is mounted on the outer peripheral portion of the right shaft housing portion 12 via the hub bearings 14a and 14b, and the hub mounting nut 14c is screwed into the end portion of the shaft housing portion 12.
- the drive shaft 18 is inserted into the right shaft receiving portion 12, and the drive shaft 18 is fixed to the end face of the hub 14 by a plurality of shaft mounting bolts 20.
- left shaft accommodating portion 12 the shaft accommodating portion located on the left side in FIG. 1 (hereinafter, referred to as “left shaft accommodating portion 12” in the case of distinguishing left and right). That is, the hub 14 is mounted on the outer peripheral portion of the left shaft housing portion 12 via the hub bearings 14a and 14b, and the hub mounting nut 14c is screwed into the end portion of the shaft housing portion 12. Further, the drive shaft 18 is inserted into the left shaft accommodation portion 12, and the drive shaft 18 is fixed to the end face of the hub 14 by a plurality of shaft attachment bolts 20.
- the left shaft housing 12 and the support member are mounted by attaching a dedicated jig (not shown) to the support member 42 disposed in the left shaft housing 12.
- the relative rotation with 42 is restricted, and in this state, the connecting portion 43 and the vehicle body frame BF are connected by the connecting bolt 143, and between the fastening connections 41b and 42b of the support members 41 and 42 and the vehicle body frame BF
- the drive unit 1 can be supported by the vehicle body frame BF if the frame mounting bolts 141 and 142 are connected.
- the bolt insertion holes BFH of the vehicle body frame BF It will be positioned in the state which the bolt insertion hole 41bH of the fastening connection part 41b opposed. Therefore, when screwing the frame mounting bolt 141 between the fastening connection portion 41b of the support member 41 and the vehicle body frame BF, the bolt insertion hole BFH of the vehicle body frame BF and the bolt insertion hole 41bH of the fastening connection portion 41b There is no need for positioning, and the work can be easily performed.
- the brake unit 50 is disposed on the outer peripheral portion of the shaft accommodating portion 12, the present invention is not limited to this.
- the drive unit 1 'as in the second embodiment shown in FIG. That is, it differs from Embodiment 1 in that only the base end portions of the support members 41 and 42 are rotatably fitted to the outer peripheral portion of the shaft housing portion 12, and the tip portions of the support members 41 and 42 are frame-mounted.
- a point that a connecting portion 43 provided in the gear accommodating portion 11 is fixed to the vehicle body frame BF by a connecting bolt 143, and an axial center of the drive shaft 18
- the position where the connecting portion 43 is provided is a position on the outer peripheral side of the tip surface of the support member 41, and the position where the connecting bolt 143 is screwed in the connecting portion 43 corresponds to the frame attachment bolt 141 in the support member 41.
- the points on the outer peripheral side from the screwing position are all the same as in the first embodiment.
- the same components as those of the first embodiment are designated by the same reference numerals and their detailed description will be omitted.
- connection portion 43 is provided in the gear storage portion 11 at a position separated from the shaft center of the drive shaft 18. Since the front wheel FW is accelerated or decelerated by the drive of the electric motor 220, the connection portion 43 can receive the rotational reaction force.
- the position at which the connecting portion 43 is provided is not limited by the support member 41 and can be set to a position on the outer peripheral side of the support member 41 with respect to the axial center of the drive shaft 18. As a result, a large rotational reaction force can be received without securing large rigidity in the connecting portion 43, and weight reduction of the unit case 10 can be achieved.
- the connecting portion 43 is provided in the gear housing portion 11.
- the connecting portion 43 is not necessarily provided in the gear housing portion 11.
- the same function and effect can be obtained by interposing separate collar members between the vehicle body frame BF and the gear accommodating portion 11 and connecting the vehicle body frame BF and the gear accommodating portion 11 via the collar members. It is possible to play
- the shaft housing portion 12 of the unit case 10 is welded to a plurality of cast parts, the outer diameters of the portions fitted to the fitting holes 41a, 42a of the support members 41, 42 are formed to the same size. By doing this, it is possible to share a large number of cast parts and to further reduce the manufacturing cost.
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Combustion & Propulsion (AREA)
- Chemical & Material Sciences (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
- Motor Power Transmission Devices (AREA)
- Forklifts And Lifting Vehicles (AREA)
- Arrangement And Driving Of Transmission Devices (AREA)
- General Details Of Gearings (AREA)
Abstract
Description
10 ユニットケース
11 ギヤ収容部
12 シャフト収容部
14 ハブ
14a,14b ハブ軸受
14c ハブ取付ナット
16 ハブボルト
18 ドライブシャフト
20 シャフト取付ボルト
30 ギヤ列
31 ドライブギヤ
32,33 アイドルギヤ
34 アイドルシャフト
41,42 支持部材
41a,42a 嵌合孔
41b,42b 締結接続部
41bH ボルト挿通孔
41c 規制部
41d 規制面
42 支持部材
43 連結部
50 ブレーキユニット
51 ブレーキ取付ボルト
120 電動モータ
121 出力軸
130 デファレンシャルギヤ
141,142 フレーム取付ボルト
143 連結ボルト
220 電動モータ
BF 車体フレーム
FW 前車輪
Claims (6)
- 出力軸を左右方向に向けた状態で電動モータを支持するとともに、内部にギヤ列を収容したギヤ収容部と、前記ギヤ収容部から左右に突出し、それぞれの内部にドライブシャフトを回転可能に収容するとともに、軸受を介して車輪を回転可能に支持した一対のシャフト収容部とを有してユニットケースを構成し、前記電動モータが駆動した場合に前記ギヤ列を介してそれぞれのドライブシャフトを回転させるようにした駆動ユニットを備える電動フォークリフトにおいて、
基端部がそれぞれ前記シャフト収容部の外周部に回転可能に嵌合された一対の支持部材を備え、各支持部材の先端部を車体フレームに接続させることにより、前記支持部材を介して左右のシャフト収容部をそれぞれ前記車体フレームに支持させ、
さらに、前記ギヤ収容部と前記車体フレームとの間に、前記ドライブシャフトの軸心を中心とした前記ユニットケースと前記車体フレームとの相対回転を規制する連結部を設けた
ことを特徴とする電動フォークリフト。 - 前記連結部は、前記ドライブシャフトの軸心を中心として前記一対の支持部材の少なくともいずれかと前記車体フレームとの支持位置よりも外周となる位置において前記ギヤ収容部から前記車体フレームに向けて突設し、突出端面を介して前記車体フレームに連結することを特徴とする請求項1に記載の電動フォークリフト。
- 前記ドライブシャフトに連結したハブと前記シャフト収容部の外周部との間に前記ハブに対して作用するブレーキユニットを配設し、前記支持部材の基端部に前記ブレーキユニットを支持させたことを特徴とする請求項1に記載の電動フォークリフト。
- 前記支持部材に一対の規制部を設けるとともに、これら一対の規制部の間に前記連結部を配置し、前記規制部を前記連結部に当接させることによって前記シャフト収容部に対する前記支持部材の回転を規制することを特徴とする請求項2に記載の電動フォークリフト。
- 前記支持部材の先端部から前記ドライブシャフトの軸心を中心として外周方向に一対の規制部を突設し、それぞれの規制部に設けた規制面を介して前記連結部に当接することを特徴とする請求項4に記載の電動フォークリフト。
- 前記一対のシャフト収容部は、前記支持部材の嵌合孔に嵌合する部分を同じ外径に構成したことを特徴とする請求項1~請求項5のいずれか一つに記載の電動フォークリフト。
Priority Applications (4)
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JP2012530027A JP5166653B2 (ja) | 2011-03-29 | 2012-02-27 | 電動フォークリフト |
US13/577,774 US8936130B2 (en) | 2011-03-29 | 2012-02-27 | Electric forklift |
DE112012001484T DE112012001484T5 (de) | 2011-03-29 | 2012-02-27 | Elektrischer Gabelstapler |
CN201280000711.8A CN102821995B (zh) | 2011-03-29 | 2012-02-27 | 电动叉车 |
Applications Claiming Priority (2)
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JP2011-072903 | 2011-03-29 | ||
JP2011072903 | 2011-03-29 |
Publications (1)
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WO2012132698A1 true WO2012132698A1 (ja) | 2012-10-04 |
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PCT/JP2012/054712 WO2012132698A1 (ja) | 2011-03-29 | 2012-02-27 | 電動フォークリフト |
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US (1) | US8936130B2 (ja) |
JP (1) | JP5166653B2 (ja) |
CN (1) | CN102821995B (ja) |
DE (1) | DE112012001484T5 (ja) |
WO (1) | WO2012132698A1 (ja) |
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Also Published As
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CN102821995B (zh) | 2014-03-26 |
CN102821995A (zh) | 2012-12-12 |
JPWO2012132698A1 (ja) | 2014-07-24 |
US8936130B2 (en) | 2015-01-20 |
US20140014422A1 (en) | 2014-01-16 |
JP5166653B2 (ja) | 2013-03-21 |
DE112012001484T5 (de) | 2013-12-24 |
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