A paddle clamp device

Abstract

This application relates to a propeller clamp device, comprising: a propeller clamp with a pin housing; two propeller blade bodies connected to the propeller clamp respectively, such that the two propeller blade bodies are symmetrically arranged along a first axis; the propeller blade bodies form a torsion angle from the blade tip to the root; a mounting base with a pin hole; a connecting pin passing through the pin housing and the pin hole, causing the propeller clamp to be rotatably connected to the mounting base; the axis of the connecting pin is arranged intersecting the first axis, thereby increasing the torsion angle when the propeller blade body wobbles downwards. This invention can automatically correct the propeller blade body towards the opposite direction of the wobbling, reducing the degree of flapping and improving stability during flight.

Description

Technical Field

[0001] This application relates to the field of propeller clamp technology, and in particular to a propeller clamp device. Background Technology

[0002] During flight, the blades of a seesaw-type propeller clamp will yaw due to the airflow, producing a flapping motion. For example, during forward flight, the blade rotating forward has a higher speed relative to the airflow and generates more lift; the blade rotating backward has a lower speed relative to the airflow and generates less lift, causing the backward blade to yaw downward around its horizontal axis. Moderate flapping can improve stability, but excessive flapping can lead to aerodynamic imbalances, especially in unstable airflow conditions, making it easy to lose control and cause tumbling.

[0003] Therefore, there is a need for a propeller clamp device that automatically performs balance correction when the propeller blades wobble. Summary of the Invention

[0004] Therefore, it is necessary to provide a propeller clamping device, the specific technical solution of which is as follows.

[0005] A paddle clamping device, comprising:

[0006] The propeller clip is equipped with a pin housing;

[0007] The blade body consists of two blade bodies connected to a blade clamp, with the two blade bodies arranged symmetrically along a first axis; the blade body forms a twist angle from the blade tip to the root.

[0008] The mounting base is equipped with a pin hole;

[0009] A connecting pin passes through the pin housing and pin hole, allowing the propeller clamp to be rotatably connected to the fixed base; the axis of the connecting pin is arranged to intersect with the first axis, increasing the torsion angle when the propeller body swings downward.

[0010] Furthermore, the axis of the connecting pin is arranged to intersect the first axis to form an angle of 5° to 10°.

[0011] Furthermore, the propeller clamp includes a propeller clamp cover, a propeller clamp base, and a propeller blade connector; the propeller blade body is clamped between the propeller clamp cover and the propeller clamp base; the propeller blade connector connects the propeller clamp base, the propeller blade body, and the propeller clamp cover into one unit.

[0012] Furthermore, the connecting pin includes a short pin, a long pin, and a pin fastener; the short pin is inserted into the pin hole, the long pin passes through the pin chamber and is inserted into the short pin; the pin fastener connects the long pin and the short pin.

[0013] Furthermore, it also includes a buffer assembly, which is mounted on a fixed base and has buffer elements at both ends; the propeller clamp has two abutment ends corresponding to the two propeller blade bodies respectively; the two abutment ends are located on both sides of the buffer assembly; during the downward swing of one side of the propeller blade body, the corresponding abutment end abuts against and squeezes the buffer element.

[0014] Furthermore, the buffer assembly includes a housing, a top pin, and an elastic element; the housing is provided with a top pin guide hole extending along a first direction; the two ends of the top pin guide hole are respectively provided with top pins movable along the first direction, the top pins extend out of the top pin guide hole, and the top pins are used to abut against the abutting end; the elastic element is disposed between the two top pins and has elastic potential energy to drive the two top pins away from each other.

[0015] Furthermore, the top pin is provided with a movable groove, and the top pin limiting member is connected to the outer shell and inserted into the movable groove. The length of the movable groove is greater than the diameter of the top pin limiting member, and the top pin limiting member is used to limit the movement stroke of the top pin.

[0016] Furthermore, the propeller clamp includes a propeller clamp body and a rubber buffer pad; the bottom of the propeller clamp body is provided with a groove, and the rubber buffer pad is connected to the propeller clamp body and abuts against the side wall of the groove; the side of the rubber buffer pad facing the top pin is the abutting end.

[0017] Furthermore, the top of the rubber buffer pad is provided with a rubber pad fixing part, and the rubber pad fixing part is provided with a limiting block; the propeller clamp body is provided with a rubber pad fixing hole; after the rubber pad fixing part passes through the fixing hole, the limiting block abuts against the propeller clamp body.

[0018] Furthermore, the rubber buffer pad has a shaped block on the side away from the contact end, and the groove has a shaped slot on the side wall of the groove, and the shaped block is inserted into the shaped slot.

[0019] Beneficial effects: 1. The propeller clamping device provided by the present invention makes the two propeller blades symmetrical along the first axis, and arranges the axis of the connecting pin to intersect the first axis to form a certain angle. As a result, when the propeller blades are affected by the airflow and wobble around the connecting pin, the twist angle of the downward-wobbled propeller blades increases, and the twist angle of the upward-wobbled propeller blades decreases. The increase in the twist angle of one side of the propeller blades will increase the windward force-bearing area of ​​the propeller blades on that side, and the greater the force on the propeller blades on that side. This will drive the propeller blades to automatically correct in the opposite direction of the wobble, reduce the degree of flapping, and improve the stability during flight.

[0020] 2. The propeller clamping device provided by the present invention, when one side of the propeller body swings downward, the buffer abuts against the corresponding abutting end of the propeller body on that side, providing a reverse force, which can reduce the degree of downward swing of the propeller body, thereby further automatically correcting the propeller; and during the flapping of the propeller body, the buffer can play a buffering role, reducing the vibration of the fixed seat caused by the flapping of the propeller body, and further improving the stability during flight. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic elevation view of the paddle clamp device;

[0023] Figure 2 This is a schematic diagram of the explosion of the paddle clamp device;

[0024] Figure 3 This is a cross-sectional view of the propeller clamp device along the plane containing the axis of the connecting pin.

[0025] Figure 4 An exploded view of the buffer assembly and the propeller clamp base;

[0026] Figure 5 This is a schematic diagram of the top pin;

[0027] Figure 6 This is a schematic diagram of a rubber cushioning pad;

[0028] Figure 7 A top view of the blade body in a balanced state;

[0029] Figure 8 This is a side view of the blade body in a balanced state.

[0030] Figure 9 A cross-sectional view of the blade body in a balanced state;

[0031] Figure 10 for Figure 9 Enlarged view of region A in the middle;

[0032] Figure 11 A top view of one side of the propeller blade body in a downward tilted state;

[0033] Figure 12 This is a side view of one side of the propeller blade body in a downward tilted state;

[0034] Figure 13 A cross-sectional view of one side of the blade body in a downward tilted state;

[0035] Figure 14 for Figure 13 Enlarged schematic diagram of region B in the middle.

[0036] Explanation of reference numerals in the attached drawings: 1. Propeller clamp; 2. Propeller blade body; 3. Mounting base; 4. Connecting pin; 5. Buffer assembly; 6. Drive component;

[0037] 11. Propeller clamp top cover; 12. Propeller clamp base; 13. Propeller blade connector; 14. Propeller blade fastener; 15. Propeller clamp fastener; 16. Rubber buffer pad;

[0038] 111. Pin housing; 112. Top cover screw hole;

[0039] 121. Base shaft hole;

[0040] 161. Rubber pad fixing part; 162. Limiting block; 163. Irregularly shaped block;

[0041] 21. First axis; 22. Connecting through hole; 23. Wear-resistant washer;

[0042] 31. Pin hole; 32. Base fixing component;

[0043] 41. Short pin; 42. Long pin; 43. Pin fastener; 44. Bearing;

[0044] 51. Outer shell; 52. Top pin; 53. Elastic element; 54. Top pin limiting element;

[0045] 511. Top pin guide hole;

[0046] 521. Active slot. Detailed Implementation

[0047] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0048] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0050] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0051] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0052] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0053] Example

[0054] This embodiment provides a propeller clamp device, including a propeller clamp 1, a propeller body 2, a fixing base 3, and a connecting pin 4. (Refer to...) Figure 1 As shown, the propeller clamp 1 is provided with a pin housing 111, which passes through the propeller clamp 1. Two propeller blade bodies 2 are respectively connected to the propeller clamp 1, so that the two propeller blade bodies 2 are symmetrically arranged along the first axis 21. The propeller blade body 2 forms a torsion angle from the blade tip to the root. When the two propeller blade bodies 2 are in a balanced state without wobbling, the torsion angles of the two propeller blade bodies 2 are the same. The fixed base 3 is provided with a pin hole 31, and the fixed base 3 is connected to the driving member 6 through a base fixing member 32. The connecting pin 4 passes through the pin housing 111 and the pin hole 31, making the propeller clamp 1 rotatably connected to the fixed base 3. The driving member 6 drives the fixed base 3 to rotate, thereby driving the propeller blade body 2 to rotate. The propeller clamp 1 and the propeller blade body 2 can rotate around the axis of the connecting pin 4, producing wobbling. (Refer to...) Figure 3 As shown, the axis of the connecting pin 4 is arranged to intersect with the first axis 21, that is, the rotation axis of the blade body 2 intersects with the first axis 21, which increases the torsion angle when the blade body 2 swings downward.

[0055] Reference Figure 7 and Figure 8 As shown, when the blade body 2 is in equilibrium and does not wobble, the twist angle of both blade bodies 2 is 9°. (Refer to...) Figure 11 and Figure 12 As shown, when one side of the blade body 2 deflects downwards and is in an unbalanced state, the blade body 2 wobbles around the axis of the connecting pin 4. Since the axis of the connecting pin 4 intersects with the first axis 21, the twist angle of the blade body 2 changes during wobbling. This causes the twist angle of the blade body 2 on the downward-wobbling side to change to 10°. At this time, the twist angles of the two blade bodies 2 are different; specifically, the twist angle of the blade body 2 on the downward-wobbling side is greater than that of the blade body 2 on the other side. The increased twist angle will increase the windward force-bearing area of ​​the blade body 2 on that side, and the force on the blade body 2 on that side will be greater. Therefore, the lift force on the blade body 2 on the downward-wobbling side is greater than that on the blade body 2 on the other side, causing the blade body 2 to automatically correct itself in the opposite direction of the wobbling.

[0056] The propeller clamping device provided in this embodiment makes the two propeller blade bodies 2 symmetrical along the first axis 21, and the axis of the connecting pin 4 is arranged to intersect with the first axis 21 to form a certain angle. As a result, when the propeller blade body 2 is affected by the airflow and wobbles around the connecting pin 4, the twist angle of the downward-wobbling propeller blade body 2 increases, and the twist angle of the upward-wobbling propeller blade body 2 decreases. The increase in the twist angle of one side of the propeller blade body 2 will increase the windward force-bearing area of ​​the propeller blade body 2 on that side, and the greater the force on the propeller blade body 2 on that side. This will drive the propeller blade body 2 to automatically correct itself in the opposite direction of the wobbling, reduce the degree of flapping, and improve the stability during flight.

[0057] Specifically, in this embodiment, the axis of the connecting pin 4 intersects the first axis 21 to form an angle of 5° to 10°. The angle should not be too large or too small. If the angle is too large, the torsion angle of the blade bodies 2 on both sides may change excessively during yaw, affecting normal flight. If the angle is too small, the torsion angle change will be insignificant, the windward force area will not change much, and the automatic balance correction effect will be poor. However, in other embodiments, the angle can be set to other angles.

[0058] Specifically, refer to Figure 2 As shown, the propeller clamp 1 includes a propeller clamp cover 11, a propeller clamp base 12, and a propeller blade connector 13. The propeller blade body 2 is clamped between the propeller clamp cover 11 and the propeller clamp base 12. The propeller blade connector 13 connects the propeller clamp base 12, the propeller blade body 2, and the propeller clamp cover 11 into one unit. Specifically, the propeller clamp cover 11 has a cover screw hole 112, the propeller blade body 2 has a connecting through hole 22, and the propeller clamp base 12 has a base shaft hole 121. The propeller blade connector 13 is inserted from below the propeller clamp base 12, passes through the base shaft hole 121 and the connecting through hole 22, and is connected to the propeller blade fastener 14. Since the propeller blade connector 13 and the propeller blade fastener 14 respectively press the propeller clamp base 12 and the propeller clamp cover 11, the propeller clamp base 12, the propeller blade body 2, and the propeller clamp cover 11 are connected into one unit.

[0059] Specifically, continue to refer to Figure 2 As shown, the propeller clamp cover 11 and the propeller clamp base 12 are also directly locked together by the propeller clamp fastener 15 to maintain the stability of the propeller clamp 1.

[0060] Specifically, continue to refer to Figure 2As shown, the connecting pin 4 includes a short pin 41, a long pin 42, and a pin fastener 43. The short pin 41 is inserted into the pin hole 31, and the long pin 42 passes through the pin compartment 111 and is inserted into the short pin 41. The pin fastener 43 connects the long pin 42 and the short pin 41. This facilitates the assembly between the connecting pin 4 and the propeller clip 1. Specifically, the pin compartment 111 is located inside the propeller clip cover 11, and a bearing 44 is installed inside the pin compartment 111. The long pin 42 is installed inside the bearing 44, allowing the propeller clip 1 to swing.

[0061] Specifically, wear-resistant washers 23 are provided between the propeller clamp cover 11 and the propeller body 2, and between the propeller clamp base 12 and the propeller body 2, which can reduce wear at the root.

[0062] Specifically, refer to Figure 4 As shown, it also includes a buffer assembly 5, which is installed on the fixed base 3. The buffer assembly 5 has buffer members at both ends. The propeller clamp 1 has two abutting ends that correspond to the two propeller blade bodies 2 respectively. The two abutting ends are located on both sides of the buffer assembly 5. During the downward swing of one side of the propeller blade body 2, the corresponding abutting end abuts against and squeezes the buffer member.

[0063] When one side of the propeller body 2 swings downward, the buffer abuts against the corresponding contact end of the propeller body 2 on that side, providing a reverse force, which can reduce the degree of downward swing of the propeller body 2, thereby further automatically correcting the propeller; and during the flapping of the propeller body 2, the buffer can play a buffering role, reducing the vibration of the fixed seat 3 caused by the flapping of the propeller body 2, and further improving the stability during flight.

[0064] It should be noted that the structure of the buffer component 5 can take many forms; this embodiment provides an example. (Continue referring to...) Figure 4 As shown, the buffer assembly 5 includes a housing 51, top pins 52, and an elastic element 53. The housing 51 has a top pin guide hole 511 extending along a first direction, which is the extension direction of the blade body 2. Each end of the top pin guide hole 511 has a top pin 52 movable along the first direction, meaning the outer contour of the top pin 52 is adapted to the top pin guide hole 511, allowing the top pin 52 to slide within the top pin guide hole 511. The top pin 52 extends outward from the top pin guide hole 511 and is used to abut against the contact end. The elastic element 53 is disposed between the two top pins 52 and has elastic potential energy to drive the two top pins 52 away from each other, i.e., it has elastic potential energy to drive the top pins 52 to extend outward from the top pin guide hole 511. When one side of the blade body 2 swings downward, the corresponding blade clamp 1 abuts against the top pin 52. Under the action of the elastic element 53, the swing of the blade body 2 can be limited and buffered, thereby achieving the effect of automatic correction and shock absorption.

[0065] Specifically, refer to Figure 5 As shown, the top pin 52 has a movable groove 521. The top pin limiting member 54 is connected to the outer shell 51 and inserted into the movable groove 521. The length of the movable groove 521 is greater than the diameter of the top pin limiting member 54. The top pin limiting member 54 is used to limit the movement stroke of the top pin 52. By cooperating with the movable groove 521, the maximum and minimum extension length of the top pin 52 can be limited. The end of the top pin 52 extending outward from the top pin guide hole 511 has a spherical surface to facilitate relative movement between the top pin 52 and the abutting end.

[0066] Specifically, the propeller clamp 1 includes a propeller clamp body and a rubber buffer pad 16; the bottom of the propeller clamp body is provided with a groove, and the rubber buffer pad 16 is connected to the propeller clamp body and abuts against the side wall of the groove; the side of the rubber buffer pad 16 facing the top pin 52 is the abutting end. By setting the rubber buffer pad 16, the cushioning can be further improved, and the shock absorption effect can be enhanced.

[0067] Specifically, the outer shell 51 is located below the propeller clamp base 12, and the rubber buffer pad 16 is installed inside the propeller clamp base 12.

[0068] Specifically, refer to Figure 6 As shown, the rubber buffer pad 16 has a rubber pad fixing part 161 at its top, and a limiting block 162 is provided on the rubber pad fixing part 161; the propeller clamp body has a rubber pad fixing hole; after the rubber pad fixing part 161 passes through the rubber pad fixing hole, the limiting block 162 abuts against the propeller clamp body. A shaped block 163 is provided on the side of the rubber buffer pad 16 away from the abutting end, and a shaped groove is provided on the side wall of the groove, into which the shaped block 163 is inserted. The rubber buffer pad 16 is deformed by squeezing the rubber pad fixing part 161 and the shaped block 163, facilitating the installation of the rubber buffer pad 16 into the propeller clamp 1.

[0069] The principle of automatic balance correction:

[0070] Reference Figures 7-10 As shown, at this time, the blade body 2 does not wobble and is in a balanced state, with the torsion angle of the blade bodies 2 on both sides being 9°. At this time, the top pins 52 at both ends of the outer shell 51 extend outward under the action of the elastic member 53, and are kept at their maximum extension length by the top pin limiting member 54.

[0071] Reference Figures 11-14As shown, when one side of the blade body 2 tilts downward under the influence of airflow, the other side of the blade body 2 tilts upward accordingly. Since the tilting axis of the blade body 2 intersects the axis of symmetry of the blade body 2 (i.e., the axis of the connecting pin 4 intersects the first axis 21), the torsion angle of the downward-tilting blade body 2 increases to 10°, while the torsion angle of the other side of the blade body 2 decreases. This increases the windward contact area of ​​the downward-tilting blade body 2, resulting in greater lift and driving the blade body 2 to rotate in the opposite direction of the tilt, thus achieving automatic correction and restoring the blade body 2 to a balanced state. Furthermore, when the blade body 2 tilts downward, the corresponding rubber buffer pad 16 abuts against the top pin 52, and under the action of the elastic element 53, it prevents the blade body 2 from tilting downward, further achieving tilt correction and also providing a shock absorption effect.

[0072] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0073] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A paddle clamping device, characterized in that, include: The propeller clip is equipped with a pin housing; The blade body consists of two blade bodies connected to a blade clamp, with the two blade bodies arranged symmetrically along a first axis; the blade body forms a twist angle from the blade tip to the root. The mounting base is equipped with a pin hole; A connecting pin passes through the pin housing and pin hole, allowing the propeller clamp to be rotatably connected to the fixed base; the axis of the connecting pin is arranged to intersect with the first axis, increasing the torsion angle when the propeller body tilts downward. The propeller clamp includes a propeller clamp cover, a propeller clamp base, and a propeller blade connector; the propeller blade body is clamped between the propeller clamp cover and the propeller clamp base; the propeller blade connector connects the propeller clamp base, the propeller blade body, and the propeller clamp cover into one unit. The connecting pin includes a short pin, a long pin, and a pin fastener; the short pin is inserted into a pin hole, and the long pin passes through a pin compartment and is inserted into the short pin. The pin fastener connects the long pin and the short pin.

2. The paddle clamping device according to claim 1, characterized in that, The axis of the connecting pin is arranged to intersect the first axis at an angle of 5° to 10°.

3. The paddle clamping device according to claim 1, characterized in that, It also includes a buffer assembly, which is mounted on a fixed base and has buffer elements at both ends. The propeller clamp has two abutment ends that correspond to the two propeller blade bodies respectively. The two abutment ends are located on both sides of the buffer assembly. During the downward swing of one side of the propeller blade body, the corresponding abutment end abuts against and squeezes the buffer element.

4. The paddle clamping device according to claim 3, characterized in that, The buffer assembly includes an outer shell, a top pin, and an elastic element; the outer shell has a top pin guide hole extending along a first direction; the two ends of the top pin guide hole are respectively provided with top pins that are movable along the first direction, the top pins extend out of the top pin guide hole, and the top pins are used to abut against the abutting end; the elastic element is disposed between the two top pins and has elastic potential energy to drive the two top pins away from each other.

5. A paddle clamping device according to claim 4, characterized in that, The top pin has a movable groove, and the top pin limiting member is connected to the outer shell and inserted into the movable groove. The length of the movable groove is greater than the diameter of the top pin limiting member, and the top pin limiting member is used to limit the movement stroke of the top pin.

6. The paddle clamping device according to claim 4, characterized in that, The propeller clamp includes a propeller clamp body and a rubber buffer pad; the bottom of the propeller clamp body is provided with a groove, and the rubber buffer pad is connected to the propeller clamp body and abuts against the side wall of the groove; the side of the rubber buffer pad facing the top pin is the abutting end.

7. A paddle clamping device according to claim 6, characterized in that, The top of the rubber buffer pad is provided with a rubber pad fixing part, and the rubber pad fixing part is provided with a limiting block; the propeller clamp body is provided with a rubber pad fixing hole; after the rubber pad fixing part passes through the fixing hole, the limiting block abuts against the propeller clamp body.

8. A paddle clamping device according to claim 7, characterized in that, The rubber buffer pad has a shaped block on the side away from the abutment end, and the groove has a shaped slot on the side wall of the groove, and the shaped block is inserted into the shaped slot.

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