Crawler crane

Abstract

The utility model relates to the field of engineering machinery, and provides a crawler crane which comprises an upper vehicle body and a lower driving body, and the upper vehicle body is rotatably mounted on the lower driving body; the first battery assembly is fixedly arranged in the upper vehicle body; and the second battery assembly is detachably connected to the lower driving body. According to the arrangement, the battery pack is divided into the first battery pack and the second battery pack, the first battery pack serves as a vehicle-mounted fixed power supply, and the second battery pack serves as a vehicle-mounted detachable power supply, so that the space of the whole vehicle is fully utilized, the second battery pack can serve as part of a balance weight, and the occupied volume space of the balance weight is not changed as much as possible; the device meets the design requirements of electric crawler cranes with medium tonnage and more than medium tonnage, meets the requirements of the cranes on battery capacity, ensures that the cranes cannot work due to power shortage, prolongs the working time, reduces the charging and replacing times, and improves the working efficiency of the cranes. And the second battery assembly has a detachable function, so that the battery replacement operation is convenient, and the use convenience of the crane is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering machinery, in particular to a crawler crane. Background Art

[0002] The more commonly used design on the market is to use the power battery as the rear counterweight, which not only facilitates the overall layout of the electric crawler crane, but also reduces the number of counterweights and minimizes costs.

[0003] However, the limitation of this design is that the method of using the power battery as the rear counterweight is only applicable to small-tonnage crawler cranes, but is no longer applicable to medium-tonnage and above models.

[0004] Since the density of the power battery is much smaller than that of the counterweight filler, the volume of the battery will be much larger than that of the counterweight filler under the premise of the same mass, which leads to the extremely large volume of the counterweight of the medium-tonnage electric crawler crane. However, for existing crawler cranes, it is unthinkable to expand the volume of the counterweight several times to place the battery.

[0005] Therefore, for electric crawler cranes of medium tonnage and above, there is an urgent need to provide a new design method that can meet the battery capacity requirements of construction machinery without changing the industrial shape of existing products as much as possible. Utility Model Content

[0006] The purpose of the utility model is to provide a crawler crane to solve the defects and shortcomings in the prior art.

[0007] In order to achieve the above object, the utility model provides a crawler crane, comprising:

[0008] An upper vehicle body and a lower traveling body, wherein the upper vehicle body can be rotatably mounted on the lower traveling body;

[0009] A first battery assembly is fixedly disposed in the upper vehicle body;

[0010] The second battery assembly is detachably connected to the lower traveling body.

[0011] The crawler crane provided by the utility model also includes:

[0012] A switching device is electrically connected to the first battery assembly and the second battery assembly respectively, and the switching device is used to enable the first battery assembly or the second battery assembly to provide the power required for the operation of the crawler crane.

[0013] According to the crawler crane provided by the utility model, the first battery assembly includes a plurality of first power batteries, and the plurality of first power batteries are stacked in sequence along the height direction of the upper vehicle body.

[0014] The crawler crane provided by the utility model also includes:

[0015] an electric motor connected to the upper vehicle body and placed in front of the plurality of the first power batteries;

[0016] The first high-voltage device is electrically connected to the plurality of the first power batteries.

[0017] The crawler crane provided by the utility model also includes:

[0018] a power distribution unit, electrically connected to the switching device;

[0019] An inverter has one end electrically connected to the power distribution unit and the other end electrically connected to the motor.

[0020] According to the crawler crane provided by the utility model, the second battery assembly includes:

[0021] A box body, detachably connected to the lower traveling body;

[0022] A plurality of second power batteries are placed in the box;

[0023] A quick-connect connector is disposed on the box body, and the quick-connect connector is electrically connected to the plurality of second power batteries.

[0024] According to the crawler crane provided by the utility model, the second battery assembly also includes:

[0025] A cooling unit is disposed in the box, and is used to cool the plurality of second power batteries.

[0026] The crawler crane provided by the utility model also includes:

[0027] The third battery assembly is arranged on the rear side of the upper vehicle body and is detachably connected to the upper vehicle body.

[0028] The crawler crane provided by the utility model also includes:

[0029] The rear counterweight is arranged on the rear side of the upper vehicle body, and the third battery assembly is placed on the top of the rear counterweight and is detachably connected to the rear counterweight.

[0030] According to the crawler crane provided by the utility model, the rear counterweight comprises:

[0031] The first rear counterweight and the second rear counterweight are spaced apart in the width direction of the upper vehicle body, and the third battery assembly is respectively disposed on the top of the first rear counterweight and the second rear counterweight.

[0032] The crawler crane provided by the utility model includes: an upper body and a lower traveling body, wherein the upper body can be rotatably installed on the lower traveling body; a first battery assembly fixedly arranged in the upper body; and a second battery assembly detachably connected to the lower traveling body. With such arrangement, by splitting into the first battery assembly and the second battery assembly, the first battery assembly serves as a fixed vehicle-mounted power source, and the second battery assembly serves as a detachable vehicle-mounted power source, so that the space of the entire vehicle can be fully utilized, and the second battery assembly can serve as a partial counterweight, and the volume space occupied by the counterweight should not be changed as much as possible, so as to meet the design requirements of electric crawler cranes of medium tonnage and above, and at the same time, it can also meet the demand of the crane for battery capacity, so as to ensure that the crane will not be unable to work due to lack of battery power, extend the working time of the crane, reduce the number of charging and battery replacement, and improve the working efficiency of the crane. In addition, the second battery assembly has a detachable function, which is convenient for battery replacement operation and improves the convenience of using the crane. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 It is the overall layout diagram of the crawler crane provided by the utility model;

[0035] Figure 2 It is a partial schematic diagram of the first battery assembly provided by the utility model;

[0036] Figure 3 It is a partial schematic diagram of the second battery assembly provided by the utility model;

[0037] Figure 4 It is a partial schematic diagram of the third battery assembly provided by the utility model;

[0038] Figure 5 It is a topological structure diagram of the high voltage part of the electric power system provided by the utility model;

[0039] Reference numerals:

[0040] 1: upper body; 2: first battery assembly; 21: first power battery; 3: rear counterweight; 31: first rear counterweight; 32: second rear counterweight; 4: second battery assembly; 41: box; 42: second power battery; 43: quick connector; 44: cooling unit; 45: second high-voltage device; 5: switching device; 6: electric motor; 7: first high-voltage device; 8: power distribution unit; 9: inverter; 10: third battery assembly; 11: lower traveling body. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0042] Combine the following Figures 1 to 5 The crawler crane of the utility model is described.

[0043] like Figures 1 to 5 As shown, the embodiment of the utility model provides a crawler crane, including an upper vehicle body 1, a lower traveling body 11, a first battery assembly 2, and a second battery assembly 4. Specifically, as Figure 1 As shown, the upper vehicle body 1 can be rotatably mounted on the lower vehicle body 11, for example, the rotation connection can be realized through a slewing bearing assembly. The first battery assembly 2 is fixedly arranged in the upper vehicle body 1. Specifically, the first battery assembly 2 can be arranged on one side or both sides of the slewing platform of the upper vehicle body 1. For example, Figure 1 The first battery assembly 2 is shown to be arranged on the left side of the rotary platform. It is understandable that once the first battery assembly 2 is installed, it will not be disassembled. The first battery assembly 2 is provided with a DC charging port and an AC charging port for flexible selection and timely charging. It should be noted that the capacity of the first battery assembly 2 can be specifically determined according to the vehicle tonnage, space conditions, operating conditions, battery performance, etc.

[0044] The second battery assembly 4 is detachably connected to the lower traveling body 11, specifically, as Figure 1As shown, the second battery assembly 4 is placed on the front side of the lower traveling body 11, so as to facilitate the installation and removal of the second battery assembly 4. In addition, a central counterweight (not shown in the figure) is generally provided on the front side of the lower traveling body 11, and the second battery assembly 4 can be placed on the front side or the upper side of the central counterweight, so that the second battery assembly 4 can make full use of the installation space of the lower traveling body 11, and the second battery assembly 4 can act as a partial counterweight to increase the stability of the whole vehicle. At the same time, the second battery assembly 4 has a detachable function to facilitate battery replacement, for example, it can be disassembled using a forklift or an auxiliary crane. It can be understood that the second battery assembly 4 adopts a detachable connection method, which is convenient for flexible adjustment, so the capacity of the second battery assembly 4 can be greater than the capacity of the first battery assembly 2, and its specific value should be determined according to the actual available space. Since the second battery assembly 4 is easy to disassemble, it has a high degree of integration and can be replaced immediately after disassembly. Users can configure two or more second battery assemblies 4 as needed for rapid rotation and use, so as to ensure that the crawler crane will not stop working due to power shortage. It is particularly suitable for construction scenes with particularly strict environmental protection requirements and cannot be charged on site. It should be noted that, as shown in the figure, Figure 1 For the placement position of the crawler crane shown in the figure, the direction indicated by the solid arrow in the figure is the front-back direction, and the direction indicated by the hollow arrow in the figure is the left-right direction.

[0045] In this way, by splitting into the first battery assembly 2 and the second battery assembly 4, the first battery assembly 2 is used as a fixed vehicle-mounted power source, and the second battery assembly 4 is used as a detachable vehicle-mounted power source, which are respectively installed at different positions of the crane, so that the space of the entire vehicle can be fully utilized. The second battery assembly 4 can act as a partial counterweight, and the volume space occupied by the counterweight should not be changed as much as possible, so as to adapt to the design requirements of electric crawler cranes of medium tonnage and above, and at the same time, it can also meet the demand of the crane for battery capacity, ensure that the crane will not be unable to work due to lack of battery power, extend the working time of the crane, reduce the number of charging and battery replacement, and improve the working efficiency of the crane. In addition, the second battery assembly 4 has a detachable function, which is convenient for battery replacement operations, improves the convenience of the crane, and is also convenient for transportation.

[0046] In the embodiment of the utility model, the crawler crane further includes a switching device 5, which is electrically connected to the first battery assembly 2 and the second battery assembly 4 respectively, and is used to make the first battery assembly 2 or the second battery assembly 4 provide the power required for the operation of the crawler crane. Specifically, the switching device 5 can use a junction box, which is connected to the first battery assembly 2 and the second battery assembly 4 respectively. In this way, the first battery assembly 2 and the second battery assembly 4 will not supply power to the high-voltage system of the whole vehicle at the same time, which ensures the safety of the high-voltage system of the whole vehicle and prolongs the working time of the crawler crane.

[0047] In a specific embodiment of the present invention, Figure 2As shown, the first battery assembly 2 includes a plurality of first power batteries 21, which are stacked in sequence along the height direction of the upper vehicle body 1, so that the upper space of the upper vehicle body 1 can be fully utilized and placed in a centralized manner. Figure 2 For the placement position of the crawler crane shown in the figure, the up-down direction in the figure is the height direction of the upper vehicle body 1.

[0048] Furthermore, in the embodiment of the utility model, the crawler crane further includes an electric motor 6 and a first high-voltage device 7, such as Figure 2 As shown, the motor 6 is fixedly mounted on the upper body 1, and the motor 6 is placed in front of the plurality of first power batteries 21. The first high-voltage device 7 is electrically connected to the plurality of first power batteries 21, respectively, and the first high-voltage device 7 is placed above the motor 6. It is understandable that the high-voltage device of a new energy vehicle generally refers to a component with high voltage electricity, such as a motor controller, a high-voltage distribution box, a high-voltage wire, a charging plug, a charging socket, etc. Generally, the first high-voltage device 7 includes a BDU (Battery Disconnect Unit, also known as a battery disconnection unit), which is an important accessory in the high-voltage circuit of a new energy vehicle, and controls the power-on and power-off process, the pre-charging process, the charging process, etc. of the high-voltage electrical circuit. Of course, the first high-voltage device 7 includes but is not limited to the BDU, and may also include other devices such as the BMS (Battery Management System), which play a vital role in new energy vehicles, and their performance and reliability are directly related to the overall performance and user experience of new energy vehicles. In this way, the motor 6 is arranged in front of the power battery, and the first high-voltage device 7 can be fully arranged above the motor 6, so as to fully utilize the space of the upper body 1, and at the same time facilitate the wiring, creating conditions for the bending radius of the high-voltage line. Figure 2 For the placement of the crawler crane shown in the figure, the direction indicated by the solid arrow in the figure is the front and rear direction.

[0049] In an optional embodiment of the present invention, the crawler crane further includes a power distribution unit 8, which is electrically connected to the switching device 5. In addition, the crawler crane further includes an inverter 9, one end of which is electrically connected to the power distribution unit 8, and the other end of which is electrically connected to the motor 6. Specifically, Figure 5As shown, the first battery assembly 2 and the second battery assembly 4 are respectively connected to the junction box, and then the junction box, the power distribution unit (PDU) 8, the inverter 9 and the motor 6 are electrically connected in sequence. For example, when the first battery assembly 2 is selected for power supply, its power output passes through the BDU and PDU, and then is transformed by the inverter, and finally input into the AC three-phase permanent magnet synchronous motor. When the second battery assembly 4 is selected for power supply, its power output passes through the internal BDU, the external junction box, and then is connected to the PDU, and finally input into the AC three-phase permanent magnet synchronous motor.

[0050] As an optional embodiment of the present utility model, Figure 3 As shown, the second battery assembly 4 includes a box body 41, a plurality of second power batteries 42, and a quick-plug connector 43. Specifically, the box body 41 is detachably connected to the lower traveling body 11, for example, it can be suspended or bolted. A plurality of second power batteries 42 are placed in the box body 41, and a quick-plug connector 43 is arranged on the box body 41. The quick-plug connector 43 is electrically connected to the plurality of second power batteries 42, and the quick-plug connector 43 is used for electrical connection with the outside. With such a configuration, the second battery assembly 4 has an independent packaging box body, which is convenient for overall installation and disassembly, and is convenient for quick connection with the outside through the quick-plug connector 43 to achieve power output, and is convenient to operate.

[0051] Furthermore, in the embodiment of the utility model, the second battery assembly 4 also includes a cooling unit 44, for example, a commonly used water cooling system can be selected. The cooling unit 44 is arranged in the box body 41, and the cooling unit 44 is used to cool down the plurality of second power batteries 42. With such a configuration, the second battery assembly 4 has an independent cooling system and does not intersect with other cooling water circuits of the vehicle, thereby avoiding leakage and other problems during battery replacement and disassembly, facilitating the realization of the detachable function and facilitating user use. In addition, if Figure 3 As shown, the box 41 also encapsulates a second high-voltage device 45, generally including a BDU, a BCU (Battery Control Unit, also known as a battery control unit), etc. Among them, the BCU controls the cooling unit 44 to determine whether the power battery needs to be cooled.

[0052] In addition, it should be noted that since crawler cranes involve many types of high-voltage devices, the cross-sectional area of ​​their high-voltage wires is generally 50mm 2 The above factors make it difficult to bend high-voltage wires. Therefore, the interconnection relationship between high-voltage devices needs to be fully considered during design. During layout, not only should the installation space be fully utilized, but also the routing of the high-voltage wires should be considered, and a bending radius should be left to avoid problems such as difficulty in bundling or bending the high-voltage wires.

[0053] In some embodiments of the present invention, the crawler crane further includes a third battery assembly 10, which is disposed on the rear side of the upper vehicle body 1, and the third battery assembly 10 is detachably connected to the upper vehicle body 1. This arrangement further increases the number of power supplies for the entire vehicle, greatly prolongs the working time of the crane, and also directly utilizes the third battery assembly 10 as a rear counterweight to improve the stability of the crane.

[0054] In other embodiments of the present invention, Figure 4 As shown, the crawler crane also includes a rear counterweight 3, which is arranged on the rear side of the upper vehicle body 1, and a third battery assembly 10 is placed on the top of the rear counterweight 3, and the third battery assembly 10 is detachably connected to the rear counterweight 3. In this way, the upper space of the rear counterweight 3 can be fully utilized to arrange the third battery assembly 10, which increases the battery capacity and the rear counterweight at the same time. It should be noted that Figure 4 As for the placement position of the crawler crane shown in the figure, the direction indicated by the solid arrow in the figure is the front-rear direction, and the upper end in the figure is the top of the rear counterweight 3.

[0055] As an optional embodiment of the present utility model, Figure 4 As shown, the rear counterweight 3 includes a first rear counterweight 31 and a second rear counterweight 32. The first rear counterweight 31 and the second rear counterweight 32 are spaced apart along the width direction of the upper vehicle body 1, and a third battery assembly 10 is provided on the top of the first rear counterweight 31 and the second rear counterweight 32, respectively. With such an arrangement, the space of the upper vehicle body is fully utilized, so that the power supply source of the whole vehicle is more diversified, and the power batteries can be flexibly combined, which greatly improves the battery capacity of the whole vehicle, effectively guarantees the working requirements of the crane, and increases the practicality of the crane. Of course, in other embodiments, the layout position of the power battery includes but is not limited to the front side of the central counterweight, the rear side of the upper vehicle body, and above the rear counterweight. It can also be placed on the left and right covers of the whole vehicle, under the chassis of the whole vehicle, etc. according to actual conditions, and can be flexibly adjusted to meet the installation space requirements. It should be noted that, as shown in the example Figure 4 For the placement position of the crawler crane shown in the figure, the direction indicated by the hollow arrow in the figure is the width direction of the upper vehicle body 1.

[0056] In summary, the embodiment of the utility model provides a crawler crane, which meets the demand for battery capacity of engineering machinery without changing the industrial shape of existing products as much as possible by arranging the first battery assembly 2 and the second battery assembly 4 at different positions, and avoids the problem of limited number of power batteries placed in the vehicle body. And by packaging the second battery assembly 4 as a whole and placing it in front of the central counterweight, it is easy to transport and disassemble, and avoids the limitation of the crawler crane due to transportation width and height. And a junction box is set to ensure that the first battery assembly 2 and the second battery assembly 4 will not supply power to the high-voltage system of the whole vehicle at the same time, while ensuring the safety of the high-voltage system, the working time of the crawler crane is extended. In order to further expand the number of power sources, the third battery assembly 10 can also be arranged at the rear side of the vehicle body or above the rear counterweight, so as to make full use of the vehicle body space, increase the battery capacity of the whole vehicle, and make the crawler crane have a wider use scenario.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A crawler crane, It is characterized in that include: An upper vehicle body (1) and a lower traveling body (11), wherein the upper vehicle body (1) can be rotatably mounted on the lower traveling body (11); A first battery assembly (2) is fixedly arranged in the upper vehicle body (1); The second battery assembly (4) is detachably connected to the lower traveling body (11).

2. The crawler crane according to claim 1, It is characterized in that Also includes: A switching device (5) is electrically connected to the first battery assembly (2) and the second battery assembly (4) respectively, and the switching device (5) is used to enable the first battery assembly (2) or the second battery assembly (4) to provide the power required for the operation of the crawler crane.

3. The crawler crane according to claim 2, It is characterized in that The first battery assembly (2) comprises a plurality of first power batteries (21), and the plurality of first power batteries (21) are stacked in sequence along the height direction of the upper vehicle body (1).

4. The crawler crane according to claim 3, It is characterized in that Also includes: An electric motor (6) is connected to the upper vehicle body (1), and the electric motor (6) is placed in front of the plurality of first power batteries (21); A first high-voltage device (7) is electrically connected to the plurality of first power batteries (21).

5. The crawler crane according to claim 4, It is characterized in that Also includes: A power distribution unit (8) electrically connected to the switching device (5); An inverter (9) has one end electrically connected to the power distribution unit (8) and the other end electrically connected to the motor (6).

6. The crawler crane according to claim 1, It is characterized in that The second battery assembly (4) comprises: A box body (41) is detachably connected to the lower traveling body (11); A plurality of second power batteries (42) are placed in the box (41); A quick-connect connector (43) is arranged on the box body (41), and the quick-connect connector (43) is electrically connected to the plurality of second power batteries (42).

7. The crawler crane according to claim 6, It is characterized in that The second battery assembly (4) further comprises: A cooling unit (44) is arranged in the box body (41), and the cooling unit (44) is used to perform a temperature reduction process on the plurality of second power batteries (42).

8. The crawler crane according to claim 1, It is characterized in that Also includes: The third battery assembly (10) is arranged on the rear side of the upper vehicle body (1) and is detachably connected to the upper vehicle body (1).

9. The crawler crane according to claim 8, It is characterized in that Also includes: The rear counterweight (3) is arranged on the rear side of the upper vehicle body (1), and the third battery assembly (10) is placed on the top of the rear counterweight (3) and is detachably connected to the rear counterweight (3).

10. The crawler crane according to claim 9, It is characterized in that The rear counterweight (3) comprises: The first rear counterweight (31) and the second rear counterweight (32) are arranged at intervals along the width direction of the upper vehicle body (1), and the third battery assembly (10) is respectively arranged on the top of the first rear counterweight (31) and the second rear counterweight (32).

Images