Seed plate sealing structure of seed-metering device, seed-metering device and seeding machine

Abstract

The utility model provides a seed plate sealing structure of a seed-metering device, the seed-metering device and a seeding machine. A seed plate sealing structure of a seed-metering device comprises a front shell, a sealing rotating disc used for rotating along with a seed plate and an inner sealing ring used for rotating along with the seed plate, the sealing rotating disc is rotatably installed in the front shell, and the inner sealing ring is installed on the sealing rotating disc. The sealing structure of the seed plate of the seed-metering device is designed, so that the rubber sealing ring and the seed-metering plate rotate synchronously, the abrasion of the sealing ring is reduced, the service life of the sealing ring is prolonged, the sealing performance of the inner cavity of the seed-metering device can be ensured, and the seeding effect is improved. As the sealing turntable is tightly attached to the seed disc through the inner sealing ring, the sealing turntable and the seed disc can be driven to rotate synchronously when the seed disc rotates, and the sealing performance of the inner cavity is ensured.

Description

Technical Field

[0001] This utility model relates to the field of seed metering sealing technology, and in particular to a seed metering disc sealing structure, a seed metering device, and a seeder. Background Technology

[0002] In recent years, my country's agriculture has developed towards intensive management, with planting areas continuously expanding and the demand for agricultural machinery efficiency increasing. With the continuous development of seeder technology in my country, the positive pressure high-speed precision seeder is becoming the main type of machine for mechanized seeding operations. The seed metering device on the positive pressure high-speed precision seeder receives positive pressure airflow generated by a positive pressure fan, pressing the seeds onto the seed tray. The seeds then rotate with the seed tray to reach the seeding area and enter the seed guide tube to complete the seeding operation. During seed metering operation, to achieve better sowing results, it is essential to ensure excellent sealing within the positive pressure chamber of the seed metering device.

[0003] Most seed metering devices on the market use rubber sealing gaskets that are attached to the seed tray. The rubber sealing gaskets are fixed to the front shell of the seed metering device. The sealing fit is formed by the squeezing contact between the seed tray and the sealing gasket, thereby ensuring the airtightness of the seed metering device cavity.

[0004] When a seeder operates at high speed, the seed disc rotates rapidly. Simultaneously, under the influence of positive pressure airflow, the friction between the seed disc and the sealing gasket intensifies, further accelerating gasket wear. This leads to gasket aging and damage, causing airflow leakage within the positive pressure chamber and affecting the sealing performance of the seed metering device. Reduced sealing results in increased air pressure demand from the seed metering device, degrading the seed flushing effect and impacting the seed metering device's sowing efficiency and overall performance. Utility Model Content

[0005] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing a seed metering disc sealing structure, a seed metering device, and a seeder.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: a seed metering device seed disc sealing structure, comprising: a front shell, a sealing turntable for rotating with the seed disc, and an inner sealing ring for rotating with the seed disc, wherein the sealing turntable is rotatably installed in the front shell, and the inner sealing ring is installed on the sealing turntable.

[0007] The beneficial effects of adopting the technical solution of this utility model are as follows: By designing the seed tray sealing structure of the seed metering device, the rubber sealing ring rotates synchronously with the seed metering disc, reducing the wear of the sealing ring, increasing its service life, and ensuring the sealing of the inner cavity of the seed metering device, thus improving the sowing effect. Because the sealing disc is tightly fitted to the seed tray through the inner sealing ring, the rotation of the seed tray will drive the sealing disc to rotate synchronously with the seed tray, ensuring the sealing of the inner cavity.

[0008] Furthermore, a cam shaft is installed in the front housing, and the sealing disc is mounted on the cam shaft via a sealing bearing; the inner ring of the sealing bearing is mounted on the cam shaft, and the sealing disc is mounted on the outer ring of the sealing bearing.

[0009] The beneficial effect of adopting the above-mentioned further technical solution is that the sealing bearing is fixed at the bottom of the sealing turntable, and then installed on the convex shaft inside the front housing through the inner hole of the sealing bearing. The two are rotatably installed, so that the sealing turntable can rotate around the axis.

[0010] Furthermore, a fixing sleeve is installed on the convex shaft, and the fixing sleeve is located on the outside of the sealed bearing.

[0011] The beneficial effect of adopting the above-mentioned further technical solution is that the fixing sleeve is installed on the convex shaft inside the front housing and placed on the outside of the sealing bearing to fix the position of the sealing bearing.

[0012] Furthermore, the fixed sleeve is connected to a bracket, on which a cleaning wheel and a pressure-breaking wheel are rotatably mounted; the convex shaft is provided with an exhaust hole.

[0013] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the cleaning wheel, pressure-breaking wheel, and support are rotatably mounted and can rotate around their own axis. When the hole rotates to the position of the pressure-breaking wheel, the pressure-breaking wheel blocks the hole, cutting off the positive pressure airflow, causing the seeds to lose the effect of the positive pressure airflow and leave the seed tray to complete the sowing action. The setting of the vent hole facilitates the positive pressure gas to enter the inner cavity between the sealing turntable and the seed tray through the hole in the seed tray, and enter the air through the vent hole inside the convex shaft of the front shell.

[0014] Furthermore, the sealing turntable is provided with a slot for installing an inner sealing ring, and the inner sealing ring is installed in the slot.

[0015] The beneficial effect of adopting the above-mentioned further technical solution is that the inner sealing ring is fixed in the slot of the sealing turntable and can rotate synchronously with the sealing turntable.

[0016] Furthermore, an outer sealing ring for docking with the seed metering device body is installed on the front shell.

[0017] The beneficial effects of adopting the above-mentioned further technical solution are: the front shell is fastened to the seed metering device body, and the outer sealing ring is squeezed and contacted with the outer end face of the seed metering device body, so that a closed inner cavity is formed inside.

[0018] Furthermore, a locking handle for connecting the seed metering device body is installed on the front housing.

[0019] The beneficial effects of adopting the above-mentioned further technical solution are: the seed tray sealing structure of the seed metering device is fixed to the seed metering device body by locking the handle. This facilitates the installation and maintenance of the front shell and the seed metering device body.

[0020] In addition, this utility model also provides a seed metering device, including a seed disc sealing structure of any one of the above-mentioned seed metering devices, and further including: a seed disc and a seed metering device body, wherein the seed disc is rotatably installed in the seed metering device body, the front shell is fastened to the seed metering device body, the outer sealing ring abuts against the seed metering device body, and the inner sealing ring abuts against the seed disc.

[0021] The beneficial effects of adopting this utility model's technical solution are as follows: The front shell is fastened to the seed metering device body, and the outer sealing ring is pressed and contacted with the outer end face of the seed metering device body, forming a closed inner cavity. An inner cavity is formed between the sealing turntable and the outer side of the seed tray, and the inner sealing ring is pressed and fitted against the outer side of the seed tray, ensuring the sealing of the inner cavity. The rubber sealing ring rotates synchronously with the seed metering tray, reducing wear on the sealing ring, increasing its service life, and ensuring the sealing of the seed metering device's inner cavity, thus improving the sowing effect. Because the sealing turntable is tightly fitted to the seed tray through the inner sealing ring, the rotation of the seed tray will drive the sealing turntable to rotate synchronously with the seed tray, ensuring the sealing of the inner cavity. This ensures the airtightness of the positive pressure chamber of the seed metering device, reduces the loss of positive pressure airflow within the seed metering device cavity, reduces the load on the fan, gives the seed metering device better airtightness, ensures the sowing effect, and improves the quality of operation.

[0022] Furthermore, the seed tray is provided with a shaped hole, the inner sealing ring is located outside the shaped hole of the seed tray, the cleaning wheel and the pressure breaking wheel abut against the seed tray, and the cleaning wheel and the pressure breaking wheel are located on the rotation trajectory of the shaped hole of the seed tray.

[0023] The beneficial effects of adopting the above-mentioned further technical solution are as follows: an inner cavity is formed between the sealing turntable and the outer side of the seed tray; the inner sealing ring is pressed and fitted against the outer side of the seed tray and is located outside the shaped hole of the seed tray, ensuring the sealing of the inner cavity. When the shaped hole rotates to the position of the pressure-breaking roller, the pressure-breaking roller blocks the shaped hole, cuts off the positive pressure airflow, and causes the seeds to lose the effect of the positive pressure airflow, leaving the seed tray to complete the sowing action.

[0024] In addition, this utility model also provides a seeder, including a seed metering device as described in any one of the above.

[0025] The beneficial effects of adopting this utility model's technical solution are as follows: The front shell is fastened to the seed metering device body, and the outer sealing ring is pressed and contacted with the outer end face of the seed metering device body, forming a closed inner cavity. An inner cavity is formed between the sealing turntable and the outer side of the seed tray, and the inner sealing ring is pressed and fitted against the outer side of the seed tray, ensuring the sealing of the inner cavity. The rubber sealing ring rotates synchronously with the seed metering tray, reducing wear on the sealing ring, increasing its service life, and ensuring the sealing of the seed metering device's inner cavity, thus improving the sowing effect. Because the sealing turntable is tightly fitted to the seed tray through the inner sealing ring, the rotation of the seed tray will drive the sealing turntable to rotate synchronously with the seed tray, ensuring the sealing of the inner cavity. This ensures the airtightness of the positive pressure chamber of the seed metering device, reduces the loss of positive pressure airflow within the seed metering device cavity, reduces the load on the fan, gives the seed metering device better airtightness, ensures the sowing effect, and improves the quality of operation.

[0026] The advantages of this invention in its additional aspects will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] Figure 1 A schematic diagram of the seed tray sealing structure of the seed metering device provided in this embodiment of the utility model.

[0028] Figure 2 This is a schematic diagram of the seed metering device provided in an embodiment of the present invention.

[0029] Figure 3 A schematic diagram of the gas flow direction of the seed metering device provided in this embodiment of the utility model.

[0030] Explanation of the reference numerals: 1. Front shell; 2. Outer sealing ring; 3. Sealing turntable; 4. Inner sealing ring; 5. Sealing bearing; 6. Fixing sleeve; 7. Bracket; 8. Hole cleaning wheel; 9. Pressure breaking wheel; 10. Locking handle; 11. Seed tray; 12. Seed metering device body. Detailed Implementation

[0031] The principles and features of this utility model are described below with reference to the accompanying drawings. The embodiments described are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0032] like Figure 1 As shown, this utility model embodiment provides a seed metering device seed disc sealing structure, including: a front shell 1, a sealing turntable 3 for rotating with the seed disc 11, and an inner sealing ring 4 for rotating with the seed disc 11. The sealing turntable 3 is rotatably installed in the front shell 1, and the inner sealing ring 4 is installed on the sealing turntable 3.

[0033] The beneficial effects of adopting the technical solution of this utility model are as follows: By designing the seed tray sealing structure of the seed metering device, the rubber sealing ring rotates synchronously with the seed metering disc, reducing the wear of the sealing ring, increasing its service life, and ensuring the sealing of the inner cavity of the seed metering device, thus improving the sowing effect. Because the sealing disc is tightly fitted to the seed tray through the inner sealing ring, the rotation of the seed tray will drive the sealing disc to rotate synchronously with the seed tray, ensuring the sealing of the inner cavity.

[0034] This utility model embodiment studies a seed metering device seed tray sealing structure, which enables the rubber sealing ring (inner sealing ring 4) and the seed metering disc (seed disc 11) to rotate synchronously, reducing the wear of the sealing ring (inner sealing ring 4), improving the service life of the sealing ring (inner sealing ring 4), and ensuring the sealing of the seed metering device cavity, thereby improving the sowing effect.

[0035] The seed metering device seed disc sealing structure provided in this embodiment of the utility model includes a front shell 1, an outer sealing ring 2, a sealing turntable 3, an inner sealing ring 4, a sealing bearing 5, a fixing sleeve 6, a bracket 7, a cleaning wheel 8, a pressure breaking wheel 9, and a locking handle 10.

[0036] The outer sealing ring 2 is installed on the edge of the front housing 1, and the sealing bearing 5 is fixed on the bottom of the sealing turntable 3. Then, it is installed on the convex shaft inside the front housing 1 through the inner hole of the sealing bearing 5. The two are rotatably installed, and the sealing turntable 3 can rotate around the axis. The inner sealing ring 4 is fixed in the slot of the sealing turntable 3 and can rotate synchronously with the sealing turntable 3. The fixing sleeve 6 is installed on the convex shaft inside the front housing 1 and placed on the outside of the sealing bearing 5 to fix the position of the sealing bearing 5. The bracket 7 is installed on the outer end face of the fixing sleeve 6 and the fixing sleeve 6 and the bracket 7 are fastened to the front housing 1 by bolt connection. The cleaning wheel 8 and the pressure breaking wheel 9 are rotatably installed with the bracket 7 and can rotate around their own axis.

[0037] like Figure 1 As shown, further, a cam shaft is installed in the front housing 1, and the sealing disc 3 is mounted on the cam shaft via a sealing bearing 5; the inner ring of the sealing bearing 5 is mounted on the cam shaft, and the sealing disc 3 is mounted on the outer ring of the sealing bearing 5.

[0038] The beneficial effect of adopting the above-mentioned further technical solution is that the sealing bearing is fixed at the bottom of the sealing turntable, and then installed on the convex shaft inside the front housing through the inner hole of the sealing bearing. The two are rotatably installed, so that the sealing turntable can rotate around the axis.

[0039] like Figure 1 As shown, a fixing sleeve 6 is further installed on the convex shaft, and the fixing sleeve 6 is located on the outside of the sealing bearing 5.

[0040] The beneficial effect of adopting the above-mentioned further technical solution is that the fixing sleeve is installed on the convex shaft inside the front housing and placed on the outside of the sealing bearing to fix the position of the sealing bearing.

[0041] like Figure 1 As shown, the fixed sleeve 6 is further connected to a bracket 7, and a cleaning wheel 8 and a pressure breaking wheel 9 are rotatably mounted on the bracket 7; the convex shaft is provided with an exhaust hole.

[0042] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the cleaning wheel, pressure-breaking wheel, and support are rotatably mounted and can rotate around their own axis. When the hole rotates to the position of the pressure-breaking wheel, the pressure-breaking wheel blocks the hole, cutting off the positive pressure airflow, causing the seeds to lose the effect of the positive pressure airflow and leave the seed tray to complete the sowing action. The setting of the vent hole facilitates the positive pressure gas to enter the inner cavity between the sealing turntable and the seed tray through the hole in the seed tray, and enter the air through the vent hole inside the convex shaft of the front shell.

[0043] like Figure 1 As shown, the sealing turntable 3 is further provided with a slot for installing the inner sealing ring 4, and the inner sealing ring 4 is installed in the slot.

[0044] The beneficial effect of adopting the above-mentioned further technical solution is that the inner sealing ring is fixed in the slot of the sealing turntable and can rotate synchronously with the sealing turntable.

[0045] like Figure 1 As shown, the front shell 1 is further provided with an outer sealing ring 2 for docking with the seed metering device body 12.

[0046] The beneficial effects of adopting the above-mentioned further technical solution are: the front shell is fastened to the seed metering device body, and the outer sealing ring is squeezed and contacted with the outer end face of the seed metering device body, so that a closed inner cavity is formed inside.

[0047] like Figure 1 As shown, the front shell 1 is further equipped with a locking handle 10 for connecting the seed metering device body 12.

[0048] The beneficial effects of adopting the above-mentioned further technical solution are: the seed tray sealing structure of the seed metering device is fixed to the seed metering device body by locking the handle. This facilitates the installation and maintenance of the front shell and the seed metering device body.

[0049] This invention fixes the inner sealing ring 4 of the seed tray of the seed metering device onto the sealing turntable 3 to form an internal sealed chamber, so that the sealing ring (inner sealing ring 4) and the seed tray 11 rotate synchronously, effectively eliminating the wear between the seed tray and the sealing ring, improving the service life of the sealing ring, and ensuring the sealing performance of the inner cavity of the seed metering device.

[0050] like Figure 2 and Figure 3As shown, this utility model also provides a seed metering device, including a seed metering device seed disc sealing structure as described in any of the above claims, and further including: a seed disc 11 and a seed metering device body 12, wherein the seed disc 11 is rotatably installed in the seed metering device body 12, the front shell 1 is fastened to the seed metering device body 12, the outer sealing ring 2 abuts against the seed metering device body 12, and the inner sealing ring 4 abuts against the seed disc 11.

[0051] The beneficial effects of adopting this utility model's technical solution are as follows: The front shell is fastened to the seed metering device body, and the outer sealing ring is pressed and contacted with the outer end face of the seed metering device body, forming a closed inner cavity. An inner cavity is formed between the sealing turntable and the outer side of the seed tray, and the inner sealing ring is pressed and fitted against the outer side of the seed tray, ensuring the sealing of the inner cavity. The rubber sealing ring rotates synchronously with the seed metering tray, reducing wear on the sealing ring, increasing its service life, and ensuring the sealing of the seed metering device's inner cavity, thus improving the sowing effect. Because the sealing turntable is tightly fitted to the seed tray through the inner sealing ring, the rotation of the seed tray will drive the sealing turntable to rotate synchronously with the seed tray, ensuring the sealing of the inner cavity. This ensures the airtightness of the positive pressure chamber of the seed metering device, reduces the loss of positive pressure airflow within the seed metering device cavity, reduces the load on the fan, gives the seed metering device better airtightness, ensures the sowing effect, and improves the quality of operation.

[0052] like Figure 2 and Figure 3 As shown, the seed disc 11 is further provided with a shaped hole, the inner sealing ring 4 is located outside the shaped hole of the seed disc 11, the cleaning wheel 8 and the pressure breaking wheel 9 abut against the seed disc 11, and the cleaning wheel 8 and the pressure breaking wheel 9 are located on the rotation trajectory of the shaped hole of the seed disc 11.

[0053] The beneficial effects of adopting the above-mentioned further technical solution are as follows: an inner cavity is formed between the sealing turntable and the outer side of the seed tray; the inner sealing ring is pressed and fitted against the outer side of the seed tray and is located outside the shaped hole of the seed tray, ensuring the sealing of the inner cavity. When the shaped hole rotates to the position of the pressure-breaking roller, the pressure-breaking roller blocks the shaped hole, cuts off the positive pressure airflow, and causes the seeds to lose the effect of the positive pressure airflow, leaving the seed tray to complete the sowing action.

[0054] The seed tray 11 is installed inside the seed metering device body 12 and can rotate relative to the seed metering device body 12. The seed tray sealing device (seed tray sealing structure) is fixed to the seed metering device body 12 by locking handle 10. The front shell 1 is fastened to the seed metering device body 12. The outer sealing ring 2 is pressed and contacted with the outer end face of the seed metering device body 12 to form a closed inner cavity. The sealing turntable 3 and the outer side of the seed tray 11 form an inner cavity. The inner sealing ring 4 is pressed and fitted with the outer side of the seed tray and is located outside the shaped hole of the seed tray 11 to ensure the sealing of the inner cavity.

[0055] The working principle is as follows, such as Figure 3 As shown, Figure 3The arrows in the diagram represent the direction and trajectory of gas flow. Positive pressure gas enters the seed metering device through the air inlet, making the closed inner cavity formed by the front shell 1 and the seed metering device body 12 a positive pressure chamber. Another part of the positive pressure gas enters the inner cavity between the sealing turntable 3 and the seed plate 11 through the shaped hole of the seed plate 11, and enters the air through the exhaust hole inside the convex shaft of the front shell 1. Seeds are stored inside the seed plate at the bottom of the seed metering device body. When the seed metering device is in operation, the seed plate 11 starts to rotate. The seeds are pressed onto the shaped hole of the seed plate 11 by the positive pressure airflow and rotate with the seed plate. When the shaped hole rotates to the position of the pressure-breaking roller 9, the pressure-breaking roller 9 blocks the shaped hole, cutting off the positive pressure airflow, so that the seeds lose the effect of the positive pressure airflow and leave the seed plate 11 to complete the sowing action. At the same time, since the sealing turntable 3 is tightly fitted to the seed plate 11 through the inner sealing ring 4, the rotation of the seed plate 11 will drive the sealing turntable 3 to rotate synchronously with the seed plate 11, ensuring the sealing of the inner cavity.

[0056] This invention, through the research of a novel seed metering device (seed metering device seed tray sealing structure), enables the sealing ring (inner sealing ring 4) to rotate synchronously with the seed tray, significantly improving the service life of the sealing ring, reducing the frequency of sealing ring replacement, and lowering operating costs. Simultaneously, it ensures the airtightness of the positive pressure chamber of the seed metering device, reduces the loss of positive pressure airflow within the chamber, lowers the load on the fan, and gives the seed metering device better airtightness, ensuring sowing effectiveness and improving operational quality.

[0057] In addition, this utility model also provides a seeder, including a seed metering device as described in any one of the above.

[0058] The beneficial effects of adopting this utility model's technical solution are as follows: The front shell is fastened to the seed metering device body, and the outer sealing ring is pressed and contacted with the outer end face of the seed metering device body, forming a closed inner cavity. An inner cavity is formed between the sealing turntable and the outer side of the seed tray, and the inner sealing ring is pressed and fitted against the outer side of the seed tray, ensuring the sealing of the inner cavity. The rubber sealing ring rotates synchronously with the seed metering tray, reducing wear on the sealing ring, increasing its service life, and ensuring the sealing of the seed metering device's inner cavity, thus improving the sowing effect. Because the sealing turntable is tightly fitted to the seed tray through the inner sealing ring, the rotation of the seed tray will drive the sealing turntable to rotate synchronously with the seed tray, ensuring the sealing of the inner cavity. This ensures the airtightness of the positive pressure chamber of the seed metering device, reduces the loss of positive pressure airflow within the seed metering device cavity, reduces the load on the fan, gives the seed metering device better airtightness, ensures the sowing effect, and improves the quality of operation.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A seed tray sealing structure for a seed metering device, characterized in that, include: The package includes a front housing, a sealing turntable for rotating with the seed disc, and an inner sealing ring for rotating with the seed disc. The sealing turntable is rotatably mounted in the front housing, and the inner sealing ring is mounted on the sealing turntable.

2. The seed metering device seed tray sealing structure according to claim 1, characterized in that, A cam shaft is installed in the front housing, and the sealing disc is mounted on the cam shaft via a sealing bearing; the inner ring of the sealing bearing is mounted on the cam shaft, and the sealing disc is mounted on the outer ring of the sealing bearing.

3. The seed metering device seed tray sealing structure according to claim 2, characterized in that, A fixing sleeve is installed on the cam shaft, and the fixing sleeve is located on the outside of the sealed bearing.

4. The seed metering device seed tray sealing structure according to claim 3, characterized in that, The fixed sleeve is connected to a bracket, on which a cleaning wheel and a pressure breaking wheel are rotatably mounted; the convex shaft is provided with an exhaust hole.

5. The seed metering device seed tray sealing structure according to claim 1, characterized in that, The sealing turntable is provided with a slot for installing an inner sealing ring, and the inner sealing ring is installed in the slot.

6. The seed metering device seed tray sealing structure according to claim 1, characterized in that, The front shell is equipped with an outer sealing ring for docking with the main body of the seed metering device.

7. The seed metering device seed tray sealing structure according to claim 1, characterized in that, The front housing is equipped with a locking handle for connecting the seed metering device body.

8. A seed metering device, characterized in that, The seed metering device seed tray sealing structure according to any one of claims 1 to 7 further includes: a seed tray and a seed metering device body, wherein the seed tray is rotatably installed in the seed metering device body, the front shell is fastened to the seed metering device body, the outer sealing ring abuts against the seed metering device body, and the inner sealing ring abuts against the seed tray.

9. A seed metering device according to claim 8, characterized in that, The seed tray has a shaped hole, the inner sealing ring is located outside the shaped hole of the seed tray, the cleaning wheel and the pressure breaking wheel abut against the seed tray, and the cleaning wheel and the pressure breaking wheel are located on the rotation trajectory of the shaped hole of the seed tray.

10. A seeder, characterized in that, The seed metering device includes any one of claims 8 to 9.

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