Power assembly on carrying vehicle and carrying vehicle

Abstract

The invention relates to carrying equipment and components thereof, and discloses a power assembly on a carrier and the carrier, the power assembly comprises a seat body and a hydraulic assembly mounted on the seat body, the hydraulic assembly comprises a hydraulic motor and a gear pump assembly, and the hydraulic motor is connected with the gear pump assembly; a cylinder body is integrally formed at the upper end of the seat body, and an ejector rod used for jacking the forklift frame is installed in the cylinder body. A hydraulic connector is arranged on the gear pump assembly, an insertion hole communicated with the cylinder body and an installation hole penetrating through the two side faces of the seat body are formed in the seat body, the hydraulic connector is inserted into the insertion hole of the seat body, and the hydraulic motor is installed in the installation hole. The cylinder body is directly and integrally formed on the seat body, so that a connecting structure is reduced, and the connecting strength between the cylinder body and the seat body is high. The hydraulic assembly is directly communicated with the cylinder body, an oil pipe is omitted between the hydraulic assembly and the cylinder body, and oil leakage risk and manufacturing cost are reduced. The hydraulic motor is accommodated in the mounting hole of the seat body, so that the hydraulic assembly is not abrupt on the seat body, the structure is compact, and the occupied space of the hydraulic assembly is small.

Description

Technical Field

[0001] The present invention relates to handling equipment and its components, and particularly to a powertrain on a forklift truck and the forklift truck. Background Art

[0002] The drive assembly of a forklift truck is an important core component. The drive assembly generally includes a seat body, a hydraulic component, a traveling motor, a reduction device, a controller, etc. The hydraulic component generally includes an oil cylinder, a hydraulic motor, a valve body, and an oil tank. The oil tank is connected to the valve body, the hydraulic motor is installed on the valve body, and the valve body is connected to the oil cylinder. For example, a drive assembly and a forklift truck disclosed in the publication number CN215364723U, the oil cylinder is a split type, the oil cylinder can be detached from the seat body, and the oil cylinder is connected and fixed to the top shaft head end of the drive assembly through a pin shaft. The valve body is connected to the oil cylinder through an oil pipe, and the oil pipe is exposed outside the seat body. The oil cylinder and the valve body need to be connected through an oil pipe, and the assembly is cumbersome, and there are many oil leakage points. Figure 8 It can be seen that the hydraulic component is installed above the seat body, occupying a large part of the space on the side of the oil cylinder. The structure of the hydraulic component is not compact enough, the space occupied by the hydraulic component is relatively large, and the overall volume of the hydraulic assembly is relatively large. At the same time, the control wire of the hydraulic motor needs to be exposed outside the seat body and connected to the controller on the seat body, which results in a messy wiring of the control wire of the drive assembly and relatively low safety. Summary of the Invention

[0003] The present invention aims at the disadvantages in the prior art and provides a powertrain on a forklift truck and the forklift truck.

[0004] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0005] The powertrain on a forklift truck includes a seat body and a hydraulic component installed on the seat body. The hydraulic component includes a hydraulic motor and a gear pump assembly, and the hydraulic motor is connected to the gear pump assembly. A cylinder body protruding vertically upward is integrally formed at the upper end of the seat body, and a jacking rod for jacking up the forklift truck frame is installed in the cylinder body. A hydraulic joint is provided on the gear pump assembly, and a plugging hole communicating with the cylinder body and an installation hole penetrating through both side surfaces of the seat body are provided on the seat body. The hydraulic joint is inserted into the plugging hole of the seat body, and the hydraulic motor is installed in the installation hole.

[0006] Preferably, it includes a controller installed on the seat body. The controller includes a housing and a control panel. The control panel is fixed in the housing. The housing is a housing with an open port. A groove is provided on the seat body. The port of the housing covers and communicates with the groove. The installation hole communicates with the groove, and the control wire of the hydraulic motor is connected to the control panel through the groove.

[0007] Preferably, the gear pump assembly includes a valve plate, a gear set, a cover plate and an end cover. An oil groove is provided on the valve plate, the cover plate is installed in the oil groove, the gear set is installed between the valve plate and the cover plate, the end cover covers the valve plate to form an oil cavity, and a hydraulic joint is integrally formed on the valve plate.

[0008] Preferably, it further includes a drive wheel. A traveling motor and a reduction device are respectively installed on both sides of the seat body. The seat body is the end cover of the traveling motor. There is a motor groove on one side of the seat body, and the traveling motor is installed on the motor groove; the seat body is the end cover of the reduction device. There is a reduction groove on the other side of the seat body. On the reduction gear set of the reduction device, the output end of the traveling motor is connected to the reduction gear set of the reduction device, and the reduction gear set of the reduction device is connected to the drive wheel to drive it to rotate.

[0009] Preferably, a wire passing hole communicating with the groove is provided on the motor groove, and the control wire of the traveling motor is connected to the control panel through the wire passing hole.

[0010] Preferably, a column is integrally formed on the seat body. A handle joint is hinged to the top of the column. A limiting groove extending axially is provided on the column. A limiting spring is installed in the limiting groove. A guide shaft shaped like a "T" is inserted into the upper end of the limiting spring. The guide shaft includes a guiding part and a limiting part. The limiting part presses against the pin shaft of the handle joint, and the guiding part extends into the limiting groove.

[0011] Preferably, a positioning groove is provided on the guiding part, a marking hole is provided on the limiting part, the marking hole and the positioning groove are on the same side, and a notch communicating with the limiting groove is provided on the outer side wall of the column. When the guide shaft and the limiting spring are assembled between the column and the pin shaft, the positioning groove is facing the notch.

[0012] Preferably, a bearing bridge is installed at the bottom of the outer circumference of the cylinder block, and the bearing bridge is installed on the cylinder block through a bearing.

[0013] A handling cart includes a fork frame and a link wheel assembly. The link wheel assembly is installed on the fork frame; it includes the power assembly on the handling cart described in claim 8, and the bearing bridge is hinged to the link wheel assembly.

[0014] Due to the adoption of the above technical solutions, the present invention has remarkable technical effects:

[0015] (1) The cylinder block is directly integrally formed on the seat body, reducing the connection structure. The connection strength between the cylinder block and the seat body is high, and it is not easy to break between the two. At the same time, the failure rate of connection looseness and the manufacturing cost are reduced.

[0016] (2) The hydraulic component is directly connected to the cylinder block, and the oil pipe is cancelled between the two, reducing the risk of oil leakage and the manufacturing cost.

[0017] (3) The hydraulic motor is accommodated in the mounting hole of the seat body, so that the hydraulic component is not obtrusive on the seat body, the structure is compact, the space occupied by the hydraulic component is small, thereby reducing the overall volume of the power assembly.

[0018] (4) The control lines of the hydraulic motor and the traveling motor are both connected through the controller inside the seat body, and the control lines of both are not exposed outside the controller, saving the connection distance between the hydraulic motor and the traveling motor and eliminating the connection cable.

[0019] (5) The seat body is not only the seat body itself, but also the end cover of the traveling motor and at the same time the end cover of the reduction device. The power assembly has a compact structure and can be made more compact in volume, reducing the manufacturing cost.

[0020] (6) A column is integrally formed on the seat body. The handle joint is directly hinged on the column, and a limiting spring for limiting the handle joint is also installed on the column. The limiting spring does not need to be installed on other components and then the whole component is installed on the seat body, saving the assembled parts, improving the assembly efficiency and reducing the manufacturing cost. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of the power assembly from the first perspective.

[0022] Figure 2 It is a schematic structural diagram of the seat body from the first perspective.

[0023] Figure 3 It is a schematic structural diagram of the power assembly from the first perspective.

[0024] Figure 4 It is a schematic structural diagram of the seat body from the second perspective.

[0025] Figure 5 It is an exploded view of the hydraulic component.

[0026] Figure 6 It is a schematic structural diagram of the cover plate and the gear set.

[0027] Figure 7 It is a schematic structural diagram of the valve plate.

[0028] Figure 8 It is a schematic assembly structural diagram of the hydraulic component.

[0029] Figure 9 It is a schematic structural diagram of the guide shaft.

[0030] Figure 10 It is a schematic structural diagram of the forklift.

[0031] The names of the parts referred to by the numerical labels in the above drawings are as follows:

[0032] 10 - Seat body, 101 - Cylinder block, 102 - Insertion hole, 103 - Mounting hole, 104 - Groove, 105 - Motor slot, 106 - Reduction slot, 107 - Threading hole, 108 - Column, 1081 - Limiting slot, 1082 - Notch

[0033] 11 - Hydraulic component, 111 - Hydraulic motor, 112 - Gear pump assembly, 1121 - Valve plate, 1122 - Gear set, 1123 - Cover plate, 1124 - End cover, 1125 - Hydraulic joint, 1126 - Suction oil pipe, 11211 - Oil sump, 11212 - Oil pumping hole, 11221 - Driving gear, 11222 - Driven gear, 11223 - Driving shaft, 11224 - Driven shaft, 11230 - Gear slot, 11231 - Oil delivery hole, 11232 - Oil pumping sump, 11233 - Driving shaft hole, 11234 - Driven shaft hole, 11235 - Oil guiding slot

[0034] 12 - Thrust rod

[0035] 13 - Housing, 131 - Heat dissipation rib, 132 - Notch

[0036] 14 - Travel motor

[0037] 15 - Reduction gear

[0038] 16 - Driving wheel

[0039] 17 - Handle joint

[0040] 18 - Limiting spring

[0041] 19 - Guide shaft, 191 - Guide part, 192 - Limiting part, 1911 - Positioning slot, 1921 - Marking hole

[0042] 20 - Pin shaft

[0043] 21 - Loading bridge

[0044] 22 - Fork carriage

[0045] 23 - Link wheel assembly Detailed implementation mode

[0046] The following combines the appended Figures 1 - 10 With the embodiments, the present invention will be further described in detail.

[0047] Embodiment 1

[0048] The powertrain on the forklift transporter includes a seat body 10 and a hydraulic component 11 mounted on the seat body 10. The hydraulic component 11 includes a hydraulic motor 111 and a gear pump assembly 112. The hydraulic motor 111 is connected to the gear pump assembly 112. When the hydraulic motor 111 operates, it drives the gear pump assembly 112 to operate, thus achieving oil pumping. At the upper end of the seat body 10, there is a vertically upward protruding cylinder block 101 integrally formed. Inside the cylinder block 101, there is a push rod 12 for lifting the forklift frame. When the push rod 12 lifts, the gear pump assembly 112 pumps the oil fluid into the cylinder block 101 and pushes the push rod 12 to rise, achieving the lifting function. When the push rod 12 does not lift, the push rod 12 descends under the gravity of the forklift frame, and the oil fluid in the cylinder block 101 flows back to the oil chamber. The gear pump assembly 112 is provided with a hydraulic joint 1125. The seat body 10 is provided with a plug hole 102 communicating with the cylinder block 101 and an installation hole 103 penetrating both side surfaces of the seat body 10. The hydraulic joint 1125 is inserted into the plug hole 102 of the seat body 10. The gear pump assembly 112 and the seat body 10 are not connected by a tubing, but directly connected by inserting the hydraulic joint 1125 on the gear pump assembly 112 into the plug hole 102 of the seat body 10, saving the tubing, reducing the risk of oil leakage and the manufacturing cost. The hydraulic motor 111 is installed in the installation hole 103. The installation hole 103 saves the material of the seat body 10 on the one hand and makes full use of the space of the seat body 10 on the other hand. The hydraulic component 11 and the seat body 10 are more compactly matched, and the stability of the hydraulic component 11 on the seat body 10 is better, and it is not easy to loosen between the two.

[0049] The powertrain includes a controller installed on the seat body 10. The controller includes a housing 13 and a control panel. The control panel is inside the housing 13 and is sealed in the housing 13 by potting. The housing 10 is an aluminum housing. The aluminum housing 10 has strong heat dissipation performance. At the same time, a number of heat dissipation ribs 131 are provided on the outer end surface of the housing 13. The heat dissipation ribs 131 increase the heat dissipation area and improve the heat dissipation performance of the housing 13. The housing 10 is fastened to the seat body 10 by screws. The housing 13 is a housing with an open port. The seat body 10 is provided with a groove 104. The port of the housing 13 covers and communicates with the groove 104. The installation hole 103 communicates with the groove 104. The control wire of the hydraulic motor 111 is connected to the control panel through the groove 104. There is a notch 132 on the side wall of the housing 13 for the power cord to pass through. The power cord of the battery is connected to the control panel through the notch 132, and the control wire harness also passes through the notch 132 and then is connected to the control panel. When the housing 13 is installed on the seat body 10, the notch 132 and the seat body 10 form an incoming wire through hole.

[0050] The gear pump assembly 112 includes a valve plate 1121, a gear set 1122, a cover plate 1123 and an end cover 1124. An oil groove 11211 is provided on the valve plate 1121. The cover plate 1123 is installed in the oil groove 11211. The gear set 1122 is installed between the valve plate 1121 and the cover plate 1123. The end cover 1124 covers the valve plate 1121 and forms an oil cavity. A hydraulic joint 1125 is integrally formed on the valve plate 1121. The gear set 1122 includes a driving gear 11221, a driven gear 11222, a driving shaft 11223 and a driven shaft 11224. The driving gear 11221 is installed on the driving shaft 11233 and rotates synchronously with it. The driven gear 11222 is installed on the driven shaft 11224 and rotates synchronously with it. A gear groove 11230 is provided on the cover plate 1123. The driving gear 11221 is installed in the driving shaft hole 11233. The driven gear 11222 is installed in the driven shaft hole 11234 and meshes with the driving gear 11221. The bottom surface of the gear groove 11230 is provided with a driving shaft hole 11233 and a driven shaft hole 11234. The driving shaft 11223 is axially limited on the driving shaft hole 11233. The driven shaft 11224 is axially limited on the driven shaft hole 11234. An oil suction pipe 1126 is installed on the cover plate 1123. The oil suction pipe 1126 extends into the oil cavity.

[0051] The cover plate 1123 is provided with an oil delivery hole 11231 and a pump oil groove 11232. The oil delivery hole 11231 and the pump oil groove 11232 are relatively arranged on both sides of the gear groove 11230 and communicate with it. The pipeline of the oil suction pipe 1126 communicates with the oil delivery hole 11231. The valve plate 1121 is provided with a pump oil hole 11212. When the cover plate 1123 is installed on the valve plate 1121, the pump oil groove 11232 communicates with the pump oil hole 11212. When the gear set 1122 rotates, the oil enters the gear groove 11230 through the oil delivery hole 11231. The oil is pumped to the pump oil groove 11232 by the gear set 1122. The oil in the pump oil groove 11232 is then output through the pump oil hole 11212.

[0052] The bottom surface of the gear groove 11230 is provided with an oil guiding groove 11235. The oil guiding groove 11235 is a T-shaped oil groove. The two transverse ends of the oil guiding groove 11235 communicate with the driving shaft hole 11233 and the driven shaft hole 11234 respectively. The middle of the oil guiding groove 11235 communicates with the oil delivery hole 11231. The oil guiding groove 11235 can deliver the oil to the driving shaft hole 11233 and the driven shaft hole 11234 respectively, so as to provide lubrication for the driving shaft 11223 and the driven shaft hole 11234.

[0053] The pump body of the gear pump assembly 11 is cancelled, and the gear set 1122 is directly installed between the valve plate 1121 and the cover plate 1123, so the gear pump assembly has high compactness. At the same time, the independent fuel tank structure is cancelled. The cover plate 1123 is installed within the valve body 1121 in a hidden manner, and the end cover 1124 is installed on the valve plate 1121. An oil cavity for storing oil is formed between them, further improving the structural layout of the gear pump assembly 112 and making the structure of the gear pump assembly 112 more compact and small. At the same time, the gear set 1122 is hidden within the cover plate 1123, and the cover plate 1123 is hidden in the oil, so that the noise generated during the operation of the hydraulic assembly 11 is relatively small.

[0054] The power assembly further includes a drive wheel 16. A traveling motor 14 and a reduction device 15 are respectively installed on both sides of the seat body 10. The seat body 10 serves as the end cover of the traveling motor 14. There is a motor groove 105 on one side of the seat body 10, and the traveling motor 14 is installed on the motor groove 105; the seat body 10 serves as the end cover of the reduction device 15. There is a reduction groove 106 on the other side of the seat body 10. On the reduction gear set 106 of the reduction device 15, the output end of the traveling motor 14 is connected to the reduction gear set of the reduction device 15, and the reduction gear set of the reduction device 15 is connected to the drive wheel 16 and drives it to rotate. The seat body 10 is not only the seat body itself, but also the end cover of the traveling motor 14 and the end cover of the reduction device 15 at the same time. The power assembly has a compact structure, and its volume can be made smaller, reducing the manufacturing cost.

[0055] A wire passing hole 107 communicating with the groove 104 is provided on the motor groove 105. The control wire of the traveling motor 14 is connected to the control panel through the wire passing hole 107. The control wire of the traveling motor 14 is not exposed outside the seat body 10, but hidden within the seat body 10, so the safety of the control wire of the traveling motor 14 is better.

[0056] A column 108 is integrally formed on the seat body 10. The top end of the column 108 is hinged with a handle joint 17, and the handle joint 17 is used for installing a handle. A limiting groove 1081 extending axially is provided on the column 108, and a limiting spring 18 is installed in the limiting groove 1081. A guide shaft 19 in the shape of a "T" is inserted into the upper end of the limiting spring 18. The guide shaft 19 is integrally formed and includes a guiding portion 191 and a limiting portion 192. The limiting portion 192 presses against the pin shaft 20 of the handle joint 17, and the guiding portion 191 extends into the limiting groove 1081, and the bottom of the guiding portion 191 does not contact the bottom surface of the limiting groove 1081. A column 108 for installing the limiting spring 18 is integrally formed on the top of the seat body 10, and the connection strength between the column 108 and the seat body 10 is high; the limiting spring 18 is convenient to install. The limiting spring 18 is directly installed in the column 108 on the seat body 10, and there is no need to install the limiting spring 18 on other components and then install the component on the seat body 10; moreover, the manufacturing cost of the handle limiting mechanism is reduced, and compared with the traditional structure, a guiding part is omitted.

[0057] A bearing bridge 21 is installed at the bottom of the outer circumference of the cylinder block 101, and the bearing bridge 21 is installed on the cylinder block 101 through a bearing.

[0058] Embodiment 2

[0059] Embodiment 2 is basically the same as Embodiment 1, except that a positioning groove 1911 is provided on the guiding portion 191, a marking hole 1921 is provided on the limiting portion 192, the marking hole 1921 and the positioning groove 1911 are on the same side, and the marking hole 1921 is used to identify the upper orientation of the positioning groove 1911. A notch 1082 communicating with the limiting groove 1081 is provided on the outer side wall of the column 108. When the guide shaft 19 and the limiting spring 18 are assembled between the column 108 and the pin shaft 20, the positioning groove 1911 faces the notch 1082. When installing the limiting spring 18, the installer prepares a limiting piece. The installer will install the guide shaft 19 in the limiting spring 18 in advance, and the limiting piece extends into the positioning groove 1911 on the guiding portion 191 in the limiting spring 18, so as to position the guide shaft 19 on the limiting spring 18, which is convenient for the integral installation of the limiting spring 18 and the guide shaft 19 in the column 108.

[0060] Embodiment 3

[0061] A forklift truck includes a fork frame 22 and a link wheel assembly 23, and the link wheel assembly 23 is installed on the fork frame 22; it includes a power assembly on the forklift truck in Embodiment 1 or 2, and the bearing bridge 21 is hinged with the link wheel assembly 23.

Claims

1. The powertrain on a transporter, comprising a seat body (10) and a hydraulic component (11) mounted on the seat body (10), the hydraulic component (11) includes a hydraulic motor (111) and a gear pump assembly (112), and the hydraulic motor (111) is connected to the gear pump assembly (112); characterized in that: At the upper end of the seat body (10), a cylinder body (101) protruding vertically upward is integrally formed. A push rod (12) for jacking up the forklift frame is installed in the cylinder body (101); a hydraulic joint (1125) is provided on the gear pump assembly (112). The seat body (10) is provided with a socket hole (102) communicating with the cylinder body (101) and a mounting hole (103) penetrating through both side surfaces of the seat body (10). The hydraulic joint (1125) is inserted into the socket hole (102) of the seat body (10), and the hydraulic motor (111) is installed in the mounting hole (103).

2. The powertrain on the transporter according to claim 1, characterized in that: It includes a controller installed on the seat body (10). The controller includes a housing (13) and a control panel. The control panel is fixed inside the housing (13). The housing (13) is a housing with an open port. The seat body (10) is provided with a groove (104). The port of the housing (13) covers and communicates with the groove (104). The mounting hole (103) communicates with the groove (104). The control line of the hydraulic motor (111) is connected to the control panel through the groove (104).

3. The powertrain on the transporter according to claim 1, characterized in that: The gear pump assembly (112) includes a valve plate (1121), a gear set (1122), a cover plate (1123), and an end cover (1124). An oil groove (11211) is provided on the valve plate (1121). The cover plate (1123) is installed in the oil groove (11211). The gear set (1122) is installed between the valve plate (1121) and the cover plate (1123). The end cover (1124) covers the valve plate (1121) to form an oil chamber. The hydraulic joint (1125) is integrally formed on the valve plate (1121).

4. The powertrain on the transporter according to claim 2, wherein: It also includes a drive wheel (16). A traveling motor (14) and a reduction device (15) are respectively installed on both sides of the seat body (10). The seat body (10) is the end cover of the traveling motor (14). An electric motor groove (105) is provided on one side of the seat body (10). The traveling motor (14) is installed on the electric motor groove (105); the seat body (10) is the end cover of the reduction device (15). A reduction groove (106) is provided on the other side of the seat body (10). On the reduction gear set (106) of the reduction device (15), the output end of the traveling motor (14) is connected to the reduction gear set of the reduction device (15). The reduction gear set of the reduction device (15) is connected to the drive wheel (16) and drives it to rotate.

5. The power assembly on the transporter according to claim 4, characterized in that: A wire passing hole (107) communicating with the groove (104) is provided on the electric motor groove (105). The control line of the traveling motor (14) is connected to the control panel through the wire passing hole (107).

6. The powertrain on the transporter according to claim 1, characterized in that: A column (108) is integrally formed on the seat body (10). The top end of the column (108) is hinged with a handle joint (17). An axially extending limiting groove (1081) is provided on the column (108). A limiting spring (18) is installed in the limiting groove (1081). A guiding shaft (19) in the shape of a "T" is inserted into the upper end of the limiting spring (18). The guiding shaft (19) includes a guiding portion (191) and a limiting portion (192). The limiting portion (192) presses against the pin shaft (20) of the handle joint (17), and the guiding portion (191) extends into the limiting groove (1081).

7. The powertrain on the transporter according to claim 6, characterized in that: The guiding part (191) is provided with a positioning groove (1911), and the limiting part (192) is provided with a marking hole (1921). The marking hole (1921) and the positioning groove (1911) are on the same side. A notch (1082) communicating with the limiting groove (1081) is provided on the outer side wall of the upright column (108). When the guiding shaft (19) and the limiting spring (18) are assembled between the upright column (108) and the pin shaft (20), the positioning groove (1911) faces the notch (1082).

8. The powertrain on the transporter according to any one of claims 1-7, characterized in that: A bearing bridge (21) is installed at the bottom of the outer circumference of the cylinder block (101), and the bearing bridge (21) is installed on the cylinder block (101) through a bearing.

9. Forklift truck, comprising a fork carriage (22) and a link wheel assembly (23), the link wheel assembly (23) being mounted on the fork carriage (22), characterized in that: Comprising the power assembly on the transporter according to claim 8, the bearing bridge (21) is hinged to the connecting rod wheel assembly (23).

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