Hydraulic oil tank mounting structure and vehicle

The hydraulic oil tank installation structure simplifies assembly and disassembly by using a lap joint and locking mechanism to suspend and secure the tank on the frame, addressing the complexity and inconvenience of existing methods.

CN222224110UActive Publication Date: 2024-12-24AEROSPACE HEAVY IND
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202421190349.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-28
Publication Date
2024-12-24
Estimated Expiration
2034-05-28

AI Technical Summary

Technical Problem

The existing installation method of hydraulic oil tanks in engineering vehicles is complicated and inconvenient due to the need for multiple precise positioning points at the bottom, making assembly and disassembly time-consuming.

Method used

A hydraulic oil tank installation structure featuring a supporting mechanism with a lap joint and locking mechanism, allowing the tank to be suspended on the frame and secured with detachable connections, simplifying the positioning process and enhancing stability.

Benefits of technology

The new structure facilitates easier and more reliable assembly and disassembly of the oil tank by reducing the need for precise bottom positioning, improving installation efficiency and reducing time.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN222224110U_ABST
    Figure CN222224110U_ABST
Patent Text Reader

Abstract

The utility model provides a hydraulic oil tank installation structure and a vehicle, and relates to the technical field of engineering machinery, the installation structure comprises an oil tank body, a bearing mechanism and at least one locking mechanism, the bearing mechanism comprises a supporting piece arranged on a vehicle frame and a lap joint piece arranged on the oil tank body, the supporting piece is in lap joint with the lap joint piece so that the oil tank body can be hung on a vehicle frame. Each locking mechanism comprises two supports arranged on the vehicle frame and a locking piece arranged on the oil tank body, the locking pieces are arranged around the oil tank body, and the two ends of each locking piece are detachably connected with the two supports so that the oil tank body can be limited between the corresponding locking piece and the vehicle frame. According to the mounting structure, when the oil tank body is positioned in the hoisting and lowering process, the oil tank body can be suspended on a frame only by enabling the lap joint piece to approximately correspond to the supporting piece up and down, at the moment, the two ends of the locking piece correspond to the positions of the supports one to one, and only the end of the locking piece needs to be connected and locked with the supports, so that the oil tank body is positioned more simply and reliably; the oil tank is more convenient to assemble and disassemble.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The utility model relates to the technical field of engineering equipment, and in particular to a hydraulic oil tank installation structure and a vehicle. Background Art

[0002] The steering, braking and lifting functions of engineering vehicles such as dump trucks, wide-body trucks and mining trucks are generally achieved through hydraulic systems. These types of vehicles need to be equipped with hydraulic oil tanks.

[0003] In the related art, the hydraulic oil tank is often installed on the frame by fixing the bottom. During the lifting and lowering process of the oil tank, the bottom of the oil tank needs to be aligned with multiple positioning points of the frame one by one before installation. This method is complicated in positioning and inconvenient in installation. Utility Model Content

[0004] The technical problem solved by the utility model is that the existing installation method of the hydraulic oil tank is complicated in positioning and inconvenient in installation.

[0005] In order to solve the above problems, on the one hand, the utility model provides a hydraulic oil tank installation structure, including an oil tank body, a supporting mechanism and at least one locking mechanism; the supporting mechanism includes a supporting member arranged on a frame and a lap joint member arranged on the oil tank body, the supporting member and the lap joint member are overlapped to allow the oil tank body to be hung on the frame; each of the locking mechanisms includes two supports arranged on the frame and a locking member arranged on the oil tank body, the locking member is arranged around the oil tank body and the two ends are respectively detachably connected to the two supports, so that the oil tank body is limited between the locking member and the frame.

[0006] Optionally, the lap joint is protruding from the side wall of the tank body, and the support member includes a support plate, the support plate is in contact with the side wall of the tank body on one side facing the tank body, and the support plate abuts against the bottom of the lap joint to support the tank body.

[0007] Optionally, the lap joint extends toward the top end of the tank body to a position higher than the side wall of the tank body, and a portion of the lap joint higher than the side wall of the tank body is configured as a hoisting portion, which is provided with a hoisting hole for hoisting the tank body.

[0008] Optionally, the locking mechanism further includes two limit plates, both of which are disposed on the frame, and the two limit plates are disposed opposite to each other so that the fuel tank body is limited between the two limit plates.

[0009] Optionally, the locking member is arranged on the side wall of the oil tank body and extends along the circumference of the oil tank body, screws are fixed at both ends of the locking member, the two supports are respectively arranged on the two limit plates and each support is arranged on the side of the corresponding limit plate facing away from the other limit plate, the support is provided with a mounting hole, the screw is passed through the mounting hole and is fixed to the support by a nut.

[0010] Optionally, the oil tank body is a cylindrical structure.

[0011] Optionally, the oil tank body, the connecting piece and the locking piece are an integrally formed structure.

[0012] Optionally, a partition is vertically provided inside the oil tank body, and a plurality of convection holes are provided on the partition.

[0013] Optionally, an oil outlet and an oil return port are provided at the bottom of the side wall of the oil tank body, and the oil return port is provided with a diffuser; and / or, an air intake filter is provided at the top of the side wall of the oil tank body; and / or, an oil drain port is provided at the bottom end of the oil tank body; and / or, the oil tank body is provided with a liquid level observation port; and / or, an oil temperature sensor and a liquid level sensor are provided in the oil tank body.

[0014] On the other hand, the utility model further provides a vehicle, comprising a vehicle frame and any one of the above-mentioned hydraulic oil tank mounting structures.

[0015] The hydraulic oil tank installation structure and vehicle of the utility model can suspend the oil tank body on the frame by setting a supporting mechanism to limit the shaking of the oil tank body in the up and down directions, and can limit the oil tank body between the locking member and the frame by setting a locking mechanism to limit the shaking of the oil tank body in the horizontal direction. The supporting mechanism and the locking mechanism are combined to stably install the oil tank body on the frame. When positioning the oil tank body during the lifting and lowering process, it is only necessary to roughly correspond the lap joint on the oil tank body to the support member on the frame, so that the oil tank body can be suspended on the frame; when the oil tank body is hung in place, the two ends of the locking member correspond to the position of the support one by one, and it is only necessary to connect and lock the end of the locking member to the support. Compared with the existing method of correspondingly positioning multiple connection points at the bottom of the oil tank, the positioning of the hydraulic oil tank installation structure is simpler and more reliable, and the oil tank is more convenient to assemble and disassemble, which can greatly reduce the time for installing or replacing the oil tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of a hydraulic oil tank installation structure in one direction according to an embodiment of the utility model;

[0017] Figure 2 for Figure 1 Structural schematic diagram of the hydraulic oil tank installation structure in another direction;

[0018] Figure 3 for Figure 2 A schematic cross-sectional view at the center is enlarged;

[0019] Figure 4 for Figure 1 Schematic diagram of the structure of the fuel tank body.

[0020] Description of reference numerals:

[0021] 10-tank body; 11-partition; 12-oil outlet; 13-oil return port; 131-diffuser; 14-intake filter; 15-oil drain port; 16-liquid level observation port; 17-oil temperature sensor; 18-liquid level sensor; 20-supporting mechanism; 21-support member; 211-support plate; 212-connecting plate; 22-lap member; 221-lifting part; 2211-lifting hole; 30-locking mechanism; 31-support; 311-mounting hole; 32-locking member; 321-screw; 33-limiting plate; 200-frame. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the present utility model, the orientations or positional relationships indicated by terms such as "top", "bottom", "up", "down", "left", and "right" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model.

[0025] The hydraulic oil tank installation structure used in the prior art has the problems of complex positioning and inconvenient installation.

[0026] See also Figure 1 and Figure 2In order to solve the above technical problems, on the one hand, an embodiment of the utility model provides a hydraulic oil tank mounting structure for mounting the hydraulic oil tank to a vehicle frame 200, and the mounting structure includes a tank body 10, a supporting mechanism 20 and at least one locking mechanism 30.

[0027] Among them, the supporting mechanism 20 includes a supporting member 21 arranged on the frame 200 and a lap joint 22 arranged on the fuel tank body 10, and the supporting member 21 and the lap joint 22 are overlapped to allow the fuel tank body 10 to be hung on the frame 200; each locking mechanism 30 includes two supports 31 arranged on the frame 200 and a locking member 32 arranged on the fuel tank body 10, and the locking member 32 is arranged around the fuel tank body 10 and the two ends are respectively detachably connected to the two supports 31, so that the fuel tank body 10 is limited between the locking member 32 and the frame 200.

[0028] During the installation of the hydraulic oil tank, the oil tank body 10 can be lifted to the top of the frame 200 by a crane. During the lowering of the oil tank body 10, the aerial posture of the oil tank body 10 is adjusted so that the support member 21 corresponds to the lap joint 22 up and down. The oil tank body 10 is further lowered so that the lap joint 22 overlaps the receiving member up and down. The oil tank body 10 can be suspended on the frame 200. Under the action of gravity, the oil tank body 10 will not shake up and down. After the oil tank body 10 is suspended in place, both ends of the locking member 32 of each locking mechanism 30 are connected to the corresponding support 31. The oil tank body 10 can be limited between the locking member 32 and the frame 200. The oil tank body 10 will not shake in the horizontal direction. In this way, the oil tank body 10 can be firmly installed on the frame 200. When disassembly is required, the two ends of the locking member 32 and the corresponding support 31 are first disassembled, and then the oil tank body 10 can be directly lifted. The hydraulic oil tank is easy to assemble and disassemble, simple and reliable.

[0029] The hydraulic oil tank installation structure of the embodiment of the utility model only needs to make the lap joint 22 on the oil tank body 10 roughly correspond to the support 21 on the frame 200 when positioning during the lowering process of the oil tank body 10, so that the oil tank body 10 can be hung on the frame 200; when the oil tank body 10 is hung in place, the two ends of the locking member 32 correspond to the positions of the support 31 one by one, and only the end of the locking member 32 needs to be connected and locked with the support 31. Compared with the existing method of positioning multiple connection points at the bottom of the oil tank, the positioning of the hydraulic oil tank installation structure is simpler and more reliable, and the oil tank is more convenient to assemble and disassemble, which can greatly reduce the time of installing or replacing the oil tank.

[0030] It should be noted that the number of the locking mechanisms 30 is not limited and can be designed according to the size of the fuel tank body 10. For example, when the height of the fuel tank body 10 is relatively small, a locking mechanism 30 can be provided in the middle of the fuel tank body 10 to stably mount the fuel tank body 10 on the vehicle frame 200; when the height of the fuel tank body 10 is relatively high, a locking mechanism 30 can be provided at the upper, middle and lower positions of the fuel tank body 10 to stably mount the fuel tank body 10 on the vehicle frame 200.

[0031] In addition, it should be noted that the side wall of the tank body 10 refers to the circumferential wall except the top wall and the bottom wall of the tank body 10 , and the circumference of the tank body 10 is the annular direction surrounding the circumferential wall of the tank body 10 .

[0032] Preferably, the fuel tank body 10 may be a cylindrical structure, specifically, it may be welded by a cylindrical side wall and two spherical end covers. The side wall of the fuel tank body 10 of the cylindrical structure is balanced in all directions and is not easily deformed, so it is convenient for the locking member 32 to fix it. Compared with a square fuel tank, the fuel tank body 10 has fewer welds, which reduces the risk of oil leakage, and the manufacturing process is simpler and the cost is lower.

[0033] Preferably, the oil tank body 10 is vertically suspended. Taking a cylindrical oil tank body 10 as an example, the axis of the oil tank body 10 extends in the vertical direction.

[0034] See also Figures 1 to 3 Preferably, the lap joint 22 is protruding from the side wall of the fuel tank body 10, and the support member 21 includes a support plate 211, and the side of the support plate 211 facing the fuel tank body 10 is in contact with the side wall of the fuel tank body 10, and the support plate 211 is in contact with the bottom of the lap joint 22 to support the fuel tank body 10. By setting the side of the support plate 211 facing the fuel tank body 10 to be adapted to the side wall of the fuel tank body 10, the fuel tank body 10 can be easily attached to the support plate 211 and follow the bottom of the support plate 211 during the lifting and lowering process, thereby limiting the horizontal shaking of the fuel tank body 10 during the lowering process, and reducing the difficulty of installation.

[0035] In the illustrated embodiment, the lap joint 22 is an arc-shaped structure extending along the circumference of the fuel tank body 10, which enables the fuel tank body 10 to be stably lowered onto the support plate 211 and abutted against the support plate 211 from top to bottom within a certain circumferential rotation angle, thereby reducing the difficulty of positioning and increasing the contact area between the lap joint 22 and the support plate 211, thereby improving the bearing capacity of the lap joint 22. The support plate 211 is an arc-shaped plate, and its curvature is consistent with the curvature of the side wall of the fuel tank body 10, so that it is easy to fit and connect with the side wall of the fuel tank body 10. Please refer to Figure 3The support member 21 also includes a connecting plate 212, which is used to connect the frame 200 and the support plate 211, so that there is a certain horizontal distance between the support plate 211 and the frame 200. The horizontal distance can provide a certain safety distance between the tank body 10 and the frame 200 during the lifting process, thereby preventing the tank body 10 from colliding with the frame 200 during the lifting and lowering process.

[0036] Of course, in other embodiments, the lap joint 22 may also be a plurality of protrusions arranged at intervals along the circumference of the tank body 10, and the tank body 10 is suspended on the support member 21 through the plurality of protrusions; the support member 21 may also only include a support plate 211, and the support plate 211 is directly connected to the frame 200. The support plate 211 may be a block structure with one side being a flat surface and the other side being a concave arc surface, which facilitates the connection of the support plate 211 to the frame and the fit with the tank body 10.

[0037] Furthermore, the lap joint 22 extends toward the top of the tank body 10 to a side wall higher than the tank body 10, and the portion of the lap joint 22 higher than the side wall of the tank body 10 is configured as a hoisting portion 221, and the hoisting portion 221 is provided with a hoisting hole 2211 for hoisting the tank body 10. In the illustrated embodiment, the lap joint 22 can be provided at the upper portion of the tank body 10, so as to extend upward to form the hoisting portion 221, thereby saving the overall material of the lap joint 22 and the hoisting portion 221 and saving costs. In order to ensure the stability of the hoisting process, the hoisting portion 221 is provided with two and relatively arranged on both sides of the tank body 10, and the extension length of the lap joint 22 along the circumference of the tank body 10 is preferably greater than half of the circumference of the circular cross-section of the tank body 10, so as to facilitate the formation of two opposite hoisting portions 221. By forming the hoisting portion 221 and the lap joint 22 as one piece, the hoisting structure is more stable, and the hoisting portion 221 is not easy to break or deform.

[0038] Preferably, the locking mechanism 30 further includes two limit plates 33, both of which are provided on the vehicle frame 200, and the two limit plates 33 are arranged opposite to each other so that the fuel tank body 10 is limited between the two limit plates 33. The two limit plates 33 are arranged perpendicular to the mounting surface of the vehicle frame 200 and extend vertically, which can limit the shaking of the fuel tank body 10 in the horizontal direction parallel to the mounting surface of the vehicle frame 200, and the locking member 32 cooperates with the bracket to limit the shaking of the fuel tank body 10 in the horizontal direction toward or away from the vehicle frame 200. The limit plates 33 cooperate with the locking member 32 to limit the shaking amplitude of the fuel tank body 10 in the horizontal direction, thereby improving the installation stability of the fuel tank body 10.

[0039] Furthermore, the locking member 32 is provided on the side wall of the fuel tank body 10 and extends along the circumference of the fuel tank body 10, and screws 321 are fixedly provided at both ends of the locking member 32, and two supports 31 are respectively provided on two limiting plates 33 and each support 31 is provided on the side of the corresponding limiting plate 33 facing away from the other limiting plate 33, and the support 31 is provided with a mounting hole 311, and the screw 321 is passed through the mounting hole 311 and fixed to the support 31 by a nut. In the illustrated embodiment, the extension length of the locking member 32 along the circumference of the fuel tank body 10 is one-half of the circumference of the circular cross section of the fuel tank body 10, so that the screw 321 can be fixed to the support 31 in a direction perpendicular to the mounting surface of the frame 200, so that the screw 321 is subjected to force. The support 31 is provided on the limiting plate 33, so as to be connected with the screw 321, and to leave enough space for the screw 321 to be tightened and fixed toward the frame 200. In this way, the locking member 32 and the support 31 are detachably connected via threaded fasteners. During installation, the screws 321 at both ends of the locking member 32 can be inserted into the corresponding mounting holes 311 of the support 31. The screws 321 are tightened by continuously tightening the nuts, so that the fuel tank body 10 abuts against the frame 200, and the fuel tank body 10 can be firmly installed on the frame 200.

[0040] Preferably, the fuel tank body 10, the lap joint 22 and the locking member 32 are an integrally formed structure, and the overall structure is more stable. The operator does not need to set the locking member 32 separately, but only needs to tighten and fix the corresponding screw rod 321 and the support 31 when the fuel tank body 10 is hung in place, which simplifies the installation steps and improves the installation efficiency.

[0041] Preferably, a partition 11 is vertically provided inside the oil tank body 10, and a plurality of convection holes are provided on the partition 11. During the hoisting process of the oil tank body 10, the shaking of the oil tank body 10 will cause the internal hydraulic oil to shake, and the shaking of the hydraulic oil will increase the shaking amplitude of the oil tank body 10, thereby affecting the installation of the oil tank body 10. By providing the partition 11, the shaking of the hydraulic oil can be hindered, and the hydraulic oil on both sides of the partition 11 can be connected to each other through the convection holes during the shaking process, thereby reducing the shaking amplitude of the hydraulic oil in the oil tank body 10, improving the hoisting stability of the oil tank body 10, and reducing the difficulty of installation. The partition 11 is preferably arranged to pass through the axis of the oil tank body 10 and both ends in the horizontal direction are connected to the inner wall of the oil tank body 10, which can minimize the shaking amplitude of the hydraulic oil, and at the same time can enhance the structural strength of the oil tank body 10 and prevent the oil tank body 10 from deforming.

[0042] See also Figure 4In some embodiments, an oil outlet 12 and an oil return port 13 are provided at the bottom of the side wall of the oil tank body 10. The oil outlet 12 and the oil return port 13 are connected to the hydraulic oil circuit of the vehicle. The oil return port 13 may be provided with a diffuser 131 to reduce inflation, foaming, turbulence and noise caused by the oil return line. An air intake filter 14 may be provided at the top of the side wall of the oil tank body 10 to achieve internal and external air pressure balance of the oil tank body 10 to avoid damage to the hydraulic pump. At the same time, the convection air can be filtered to prevent external impurities from entering the oil tank body 10. An oil drain port 15 may be provided at the bottom of the oil tank body 10 to easily drain the hydraulic oil when replacing the hydraulic oil or cleaning the oil tank. The oil tank body 10 may be provided with a liquid level observation port 16 to observe the liquid level when adding or replenishing the hydraulic oil. The oil tank body 10 may be provided with an oil temperature sensor 17 and a liquid level sensor 18, which are used to monitor the oil temperature and oil level of the hydraulic oil in the oil tank body 10, respectively, so as to control the working condition of the vehicle hydraulic system. By providing various functional components and designing their positions, the functionality of the oil tank body 10 can be improved, the oil tank structure can be simplified, and the manufacturing cost of the oil tank can be reduced.

[0043] On the other hand, the embodiment of the utility model further provides a vehicle, including a frame 200 for mounting a hydraulic oil tank and the hydraulic oil tank mounting structure of the aforementioned embodiment. The vehicle can be an engineering vehicle such as a dump truck, a wide-body vehicle, a mining truck, or other vehicles with a hydraulic system. Since the vehicle adopts all the technical solutions of the aforementioned embodiment, it has at least all the beneficial effects brought by the technical solutions of the aforementioned embodiment, which will not be described one by one here.

[0044] Although the utility model is disclosed as above, the protection scope of the utility model is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A hydraulic oil tank installation structure, characterized in that: include: Fuel tank body (10); The supporting mechanism (20) comprises a supporting member (21) provided on the vehicle frame (200) and a bridging member (22) provided on the fuel tank body (10), wherein the supporting member (21) and the bridging member (22) are overlapped to allow the fuel tank body (10) to be hung on the vehicle frame (200); At least one locking mechanism (30), each of the locking mechanisms (30) comprising two supports (31) arranged on the frame (200) and a locking member (32) arranged on the fuel tank body (10), the locking member (32) being arranged around the fuel tank body (10) and having two ends respectively detachably connected to the two supports (31), so that the fuel tank body (10) is limited between the locking member (32) and the frame (200).

2. The hydraulic oil tank installation structure according to claim 1, characterized in that: The lap joint (22) is protruding from the side wall of the oil tank body (10), and the support member (21) comprises a support plate (211), and the support plate (211) is in contact with the side wall of the oil tank body (10) on the side facing the oil tank body (10), and the support plate (211) is in contact with the bottom of the lap joint (22) to support the oil tank body (10).

3. The hydraulic oil tank installation structure according to claim 2, characterized in that: The lap joint (22) extends toward the top end of the tank body (10) to a position higher than the side wall of the tank body (10); a portion of the lap joint (22) higher than the side wall of the tank body (10) is configured as a hoisting portion (221); and the hoisting portion (221) is provided with a hoisting hole (2211) for hoisting the tank body (10).

4. The hydraulic oil tank installation structure according to claim 1, characterized in that: The locking mechanism (30) further comprises two limit plates (33), both of which are arranged on the vehicle frame (200), and the two limit plates (33) are arranged opposite to each other so that the oil tank body (10) is limited between the two limit plates (33).

5. The hydraulic oil tank installation structure according to claim 4, characterized in that: The locking member (32) is arranged on the side wall of the oil tank body (10) and extends along the circumference of the oil tank body (10), screw rods (321) are fixedly arranged at both ends of the locking member (32), the two supports (31) are respectively arranged on the two limit plates (33), and each support (31) is arranged on the side of the corresponding limit plate (33) facing away from the other limit plate (33), the support (31) is provided with a mounting hole (311), the screw rod (321) is passed through the mounting hole (311) and is fixed to the support (31) by a nut.

6. The hydraulic oil tank installation structure according to claim 1, characterized in that: The oil tank body (10) is a cylindrical structure.

7. The hydraulic oil tank installation structure according to claim 1, characterized in that: The oil tank body (10), the bridging member (22) and the locking member (32) are an integrally formed structure.

8. The hydraulic oil tank installation structure according to claim 1, characterized in that: A partition plate (11) is vertically arranged inside the oil tank body (10), and a plurality of convection holes are arranged on the partition plate (11).

9. The hydraulic oil tank installation structure according to claim 1, characterized in that: The bottom of the side wall of the oil tank body (10) is provided with an oil outlet (12) and an oil return port (13), and the oil return port (13) is provided with a diffuser (131); and / or, An air intake filter (14) is provided on the top of the side wall of the oil tank body (10); and / or, The bottom end of the oil tank body (10) is provided with an oil drain port (15); and / or, The oil tank body (10) is provided with a liquid level observation port (16); and / or, An oil temperature sensor (17) and a liquid level sensor (18) are provided in the oil tank body (10).

10. A vehicle, characterized in that: It comprises a vehicle frame (200) and a hydraulic oil tank mounting structure as claimed in any one of claims 1 to 9.