Positioning device and press-in device for press-in of flat key and key groove in interference fit mode
By designing a combination device of the support seat and the fixed plate, the problem of the flat key being skewed during interference press-in is solved, the flat key is accurately pressed in, and damage to the keyway is avoided.
Patent Information
- Application Number
- CN202422455957.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-11
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2034-10-11
AI Technical Summary
The flat key is easily skewed when it is pressed into the keyway by interference, resulting in it not being pressed into place and damaging the keyway at the shaft end.
A positioning device is designed, which includes a support seat, a first fixed plate and a second fixed plate. By setting grooves and stepped cuts on the top surface of the support seat, the fixed plates abut against both sides of the flat key to prevent skewness and ensure that the flat key is pressed in vertically.
It effectively prevents the flat key from tilting during the pressing process, ensuring that the flat key is accurately pressed into the keyway to avoid damage.
Smart Images
Figure CN223301218U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of tooling technology, and in particular to a positioning device and a pressing device for pressing a flat key into a keyway through interference fit. Background Art
[0002] Using a flat key on a shaft is a common transmission method in various mechanical structures. When transmitting relatively high torque, the flat key and keyway use an interference fit. Because flat keys can easily become misaligned during press-fit, pressing them directly into the shaft after a misaligned key often results in improper insertion, and in severe cases, damage to the shaft keyway. In production, if a flat key becomes misaligned when pressed into a keyway, the solution is to remove it and re-press it, or simply discard it.
[0003] Therefore, how to effectively prevent the flat key from being placed crooked when it is pressed into the keyway due to interference, so as to prevent the flat key from not being pressed into place, is a problem that needs to be solved by those skilled in the art. Utility Model Content
[0004] The purpose of this application is to provide a positioning device and a pressing device for pressing a flat key into a keyway with an interference fit, so as to solve the problem that the flat key is easily placed crookedly during interference pressing, and the flat key may not be pressed into place directly after being crooked.
[0005] In order to solve the above technical problems, the present application provides a positioning device for press-fitting a flat key into a keyway through interference fit, comprising: a support seat, a first fixed plate and a second fixed plate;
[0006] The top surface of the support seat is provided with a groove, and the groove is used to place a shaft body provided with a keyway. The first fixed plate and the second fixed plate are provided on the top surface of the support seat, and the first fixed plate and the second fixed plate are respectively located on both sides of the groove. A first step cut is provided on one side of the bottom of the first fixed plate, and a second step cut is provided on one side of the bottom of the second fixed plate. The step surface of the first step cut and the step surface of the second step cut respectively abut against both sides of the keyway, and the side surface of the first fixed plate provided with the first step cut and the side surface of the second fixed plate provided with the second step cut are respectively used to abut against both sides of the flat key.
[0007] Optionally, the first fixing plate and the second fixing plate are adjustable in position on the top surface of the support base to change the distance between the first fixing plate and the second fixing plate.
[0008] Optionally, the first fixing plate and the second fixing plate are both provided with an oblong hole, screw holes are respectively provided on both sides of the top surface of the support seat, the tail of the knob passes through the oblong hole and is threadedly connected to the screw hole, and the head of the knob is provided with a knob cap, the length of the knob cap is greater than the width of the oblong hole, and the knob can be moved in the length direction of the oblong hole to change the distance between the first fixing plate and the second fixing plate.
[0009] Optionally, the top surface of the support seat is rotatably connected to a first screw rod and a second screw rod, the first screw rod and the second screw rod are horizontally arranged on both sides of the groove, the first screw rod is threadedly connected to a first nut, the second screw rod is threadedly connected to a second nut, the first nut is connected to the bottom of the first fixed plate, and the second nut is connected to the bottom of the second fixed plate.
[0010] Optionally, the support seat includes a base and an axis positioning seat, the groove is provided on the axis positioning seat, the screw holes are respectively provided on both sides of the top surface of the base, and the two screw holes are respectively located on both sides of the groove, and the base and the axis positioning seat are detachably connected.
[0011] Optionally, the base is provided with a mounting groove for placing the shaft locating seat, and when the shaft locating seat is nested in the base through the mounting groove, the top surface of the shaft locating seat is flush with the top surface of the base.
[0012] Optionally, the side wall of the installation groove is provided with a positioning strip, the side wall of the shaft positioning seat is provided with a positioning groove that matches the positioning strip, and the shaft positioning seat is embedded in the installation groove through the positioning strip and the positioning groove.
[0013] Optionally, a positioning portion is connected to the bottom edge of the base, and a positioning hole is provided on the positioning portion. The positioning hole is used to cooperate with a positioning pin to fix the base.
[0014] Optionally, there are multiple positioning portions, and the multiple positioning portions are arranged at intervals along the bottom edge of the base.
[0015] The present application also provides a pressing device, comprising a press and the positioning device.
[0016] The present application provides a positioning device for press-fitting a flat key and a keyway with an interference fit, comprising: a support seat, a first fixed plate and a second fixed plate; a groove is provided on the top surface of the support seat, the groove is used to place a shaft body provided with a keyway, the first fixed plate and the second fixed plate are arranged on the top surface of the support seat, and the first fixed plate and the second fixed plate are respectively located on both sides of the groove, a first step cut is provided on one side of the bottom of the first fixed plate, and a second step cut is provided on one side of the bottom of the second fixed plate, the step surface of the first step cut and the step surface of the second step cut respectively abut against both sides of the keyway, and the side surface of the first fixed plate provided with the first step cut and the side surface of the second fixed plate provided with the second step cut are respectively used to abut against both sides of the flat key. The shaft body is fixed by the groove, the step surface of the first step cut and the step surface of the second step cut. When the flat key is placed on the keyway of the shaft body, the side surface of the first fixing plate and the side surface of the first fixing plate respectively abut against both sides of the flat key, which can effectively prevent the flat key from being placed skewed, thereby ensuring that the subsequent flat key is pressed in vertically, so that the flat key in the keyway is pressed into place.
[0017] The present application also provides a pressing device, including the above-mentioned positioning device, and the effect is as above. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0019] Figure 1 A structural diagram of a positioning device for press-fitting a flat key into a keyway with an interference fit provided in an embodiment of the present application;
[0020] Figure 2 A structural diagram of a fixed disk provided in an embodiment of the present application;
[0021] Figure 3 An exploded view of a positioning device provided in an embodiment of the present application in which a flat key is pressed into a keyway through an interference fit;
[0022] The figure numbers are as follows: 1-support seat, 2-first fixed plate, 3-second fixed plate, 4-axis body, 5-flat key, 6-groove, 7-oblong hole, 8-knob, 9-screw hole, 101-base, 102-axis positioning seat, 103-positioning bar, 104-positioning groove, 105-positioning part, 106-positioning hole, 201-first step incision, 301-second step incision, 401-keyway. DETAILED DESCRIPTION
[0023] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.
[0024] The core of this application is to provide a positioning device and a pressing device for pressing a flat key into a keyway with an interference fit, which is used to effectively prevent the flat key from being placed crooked when it is pressed into the keyway with an interference fit, so as to prevent the flat key from being pressed into the wrong position.
[0025] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.
[0026] Figure 1 This is a structural diagram of a positioning device for press-fitting a flat key into a keyway through interference fit provided in an embodiment of the present application. Figure 2 A structural diagram of a fixed disk provided in an embodiment of the present application is shown in FIG. Figure 1 and Figure 2 As shown, the positioning device in which the flat key 5 is interference fit with the keyway 401 and pressed in comprises: a support seat 1, a first fixed plate 2 and a second fixed plate 3; a groove 6 is provided on the top surface of the support seat 1, and the groove 6 is used to place the shaft body 4 provided with the keyway 401, the first fixed plate 2 and the second fixed plate 3 are provided on the top surface of the support seat 1, and the first fixed plate 2 and the second fixed plate 3 are respectively located on both sides of the groove 6, a first step cut 201 is provided on one side of the bottom of the first fixed plate 2, and a second step cut 301 is provided on one side of the bottom of the second fixed plate 3, the step surface of the first step cut 201 and the step surface of the second step cut 301 are respectively abutted on both sides of the keyway 401, and the side surface of the first fixed plate 2 with the first step cut 201 and the side surface of the second fixed plate 3 with the second step cut 301 are respectively used to abut against both sides of the flat key 5.
[0027] The embodiment of the present application does not specifically limit the shape and size of the support seat 1. A groove 6 is provided in the middle of the top surface of the support seat 1. Since the shape of the shaft body 4 is cylindrical, the groove 6 can be set to a semi-cylindrical shape, that is, the cross section of the groove 6 is semi-circular. The embodiment of the present application does not specifically limit the connection method between the first fixed disk 2 and the second fixed disk 3 and the support seat 1. It can be a fixed connection or a sliding connection, etc. The width of the gap between the first fixed disk 2 and the second fixed disk 3 is adapted to the width of the flat key 5. The side surfaces of the first fixed disk 2 and the second fixed disk 3 respectively abut against the side surfaces of the flat key 5 to prevent the flat key 5 from skewing. Figure 2As shown, the first fixed plate 2 has a first step cutout 201 at the bottom, and the second fixed plate 3 has a second step cutout 301 at the bottom. The vertical surface of the step cutout is called the step face, which is usually a vertical part cut out of a wooden board or material. The horizontal surface of the step cutout is called the step tread, which is the top plane of each step. Figure 1 As shown, when the lower half of the shaft body 4 is engaged in the groove 6, the keyway 401 faces upward, and the step surface of the first step cut 201 and the step surface of the second step cut 301 respectively abut against the two sides of the keyway 401 of the shaft body 4, thereby stably fixing the shaft body 4 and preventing the shaft body 4 from rotating.
[0028] The embodiment of the present application provides a positioning device for interference fit and press-fit of a flat key and a keyway, comprising: a support seat 1, a first fixed plate 2 and a second fixed plate 3; a groove 6 is provided on the top surface of the support seat 1, and the groove 6 is used to place a shaft body 4 provided with a keyway 401, the first fixed plate 2 and the second fixed plate 3 are arranged on the top surface of the support seat 1, and the first fixed plate 2 and the second fixed plate 3 are respectively located on both sides of the groove 6, a first step cut 201 is provided on one side of the bottom of the first fixed plate 2, and a second step cut 301 is provided on one side of the bottom of the second fixed plate 3, the step surface of the first step cut 201 and the step surface of the second step cut 301 are respectively abutted on both sides of the keyway 401, and the side surface of the first fixed plate 2 with the first step cut 201 and the side surface of the second fixed plate 3 with the second step cut 301 are respectively used to abut against both sides of the flat key 5. The shaft body 4 is fixed by the groove 6, the step surface of the first step cut 201 and the step surface of the second step cut 301. When the flat key 5 is placed on the key groove 401 of the shaft body 4, the side surface of the first fixed disk 2 and the side surface of the first fixed disk 2 respectively abut against the two sides of the flat key 5, which can effectively prevent the flat key 5 from being placed crookedly, thereby ensuring that the subsequent flat key 5 is pressed in vertically, so that the flat key 5 in the key groove 401 is pressed into place.
[0029] Based on the above embodiment, the first fixed disk 2 and the second fixed disk 3 of the embodiment of the present application are adjustable in position and are arranged on the top surface of the support seat 1 to change the distance between the first fixed disk 2 and the second fixed disk 3. The embodiment of the present application does not specifically limit the arrangement method of the adjustable position of the first fixed disk 2 and the second fixed disk 3. It can be that the first fixed disk 2 and the second fixed disk 3 are both slidably connected to the top surface of the support seat 1, and the first fixed disk 2 and the second fixed disk 3 on both sides of the sliding groove 6 are locked by a locking mechanism according to the width of the flat key 5, so that the distance between the first fixed disk 2 and the second fixed disk 3 is the width of the flat key 5. The position of the first fixed disk 2 and the second fixed disk 3 in the embodiment of the present application is adjustable and can adapt to flat keys 5 of different key widths.
[0030] Based on the above embodiments, the embodiments of the present application provide a configuration in which the positions of the first fixed plate 2 and the second fixed plate 3 are adjustable. Figure 3 An exploded view of a positioning device provided in an embodiment of the present application in which a flat key is pressed into a keyway through interference fit, as shown in FIG. Figure 3 As shown, the first fixed plate 2 and the second fixed plate 3 are both provided with an oblong hole 7, and screw holes 9 are respectively provided on both sides of the top surface of the support base 1. The tail of the knob 8 passes through the oblong hole 7 and is threadedly connected to the screw hole 9. The head of the knob 8 is provided with a knob cap. The length of the knob cap is greater than the width of the oblong hole 7. The knob 8 can be moved in the length direction of the oblong hole 7 to change the distance between the first fixed plate 2 and the second fixed plate 3.
[0031] Combination 1 and Figure 3 As shown, the tail of the knob 8 is connected to the screw hole 9 on the top surface of the support seat 1 through the oblong hole 7 on the first fixed plate 2. The first fixed plate 2 can move in the direction close to the groove 6 and away from the groove 6. The second fixed plate 3 can also move in the direction close to the groove 6 and away from the groove 6. After adjusting the distance between the first fixed plate 2 and the second fixed plate 3 according to the width of the flat key 5, tighten the button to lock the first fixed plate 2 and the second fixed plate 3 on the support seat 1. The matching design of the oblong hole 7 and the knob 8 in the embodiment of the present application has a relatively simple structure and low manufacturing cost. Among them, the width of the oblong hole 7 usually refers to the shorter dimension of the hole, that is, the narrow side of the hole, and this dimension is sometimes called the "minor diameter" or "narrow diameter"; the length of the oblong hole 7 refers to the longer dimension of the hole, that is, the long side of the hole, and this dimension is sometimes called the "major diameter" or "long diameter".
[0032] Based on the above embodiment, the embodiment of the present application provides another arrangement method in which the positions of the first fixed plate 2 and the second fixed plate 3 are adjustable. The top surface of the support base 1 is rotatably connected to a first screw rod and a second screw rod, which are horizontally arranged on both sides of the groove 6. The first screw rod is threadedly connected to a first nut, and the second screw rod is threadedly connected to a second nut. The first nut is connected to the bottom of the first fixed plate 2, and the second nut is connected to the bottom of the second fixed plate 3.
[0033] Regarding how to drive the first screw and the second screw to rotate, it can be driven by a rotating motor, or the first screw and the second screw can be rotated manually. By rotating the first screw and the second screw, the first nut moves in the length direction of the first screw, thereby driving the first fixed disk 2 to move, and the second nut moves in the length direction of the second screw, thereby driving the second fixed disk 3 to move, and then the distance between the first fixed disk 2 and the second fixed disk 3 can be adjusted. The embodiment of the present application utilizes the cooperation of the screw and the nut to achieve an adjustable position of the fixed disk on the top surface of the support seat 1. This design facilitates the adjustment of the spacing between the first fixed disk 2 and the second fixed disk 3, and the spacing adjustment accuracy is high.
[0034] Based on the above embodiments, the support seat 1 of the embodiment of the present application includes a base 101 and an axis positioning seat 102, a groove 6 is provided on the axis positioning seat 102, screw holes 9 are respectively provided on both sides of the top surface of the base 101, and the two screw holes 9 are respectively located on both sides of the groove 6, and the base 101 and the axis positioning seat 102 are detachably connected.
[0035] The embodiment of the present application does not limit the specific method of detachable connection between the base 101 and the shaft positioning seat 102. The detachable connection method facilitates the replacement of the shaft positioning seat 102. Since the sizes of the grooves 6 on different shaft positioning seats 102 are different, they can adapt to shaft bodies 4 with different shaft diameters.
[0036] Based on the above embodiment, the base 101 of the present application is provided with a mounting groove for placing the shaft locating seat 102. When the shaft locating seat 102 is nested in the base 101 through the mounting groove, the top surface of the shaft locating seat 102 is flush with the top surface of the base 101. The present application achieves a detachable connection between the shaft locating seat 102 and the base 101 by nesting the shaft locating seat 102 in the base 101, which has a simple structure and is easy to manufacture.
[0037] Furthermore, the side wall of the installation groove is provided with a positioning strip 103, and the side wall of the shaft positioning seat 102 is provided with a positioning groove 104 that matches the positioning strip 103. The shaft positioning seat 102 is embedded in the installation groove through the positioning strip 103 and the positioning groove 104. Figure 3 As shown, the shaft locating seat 102 is provided with a positioning groove 104 on both sides, and the positioning groove 104 is connected to the top and bottom of the shaft locating seat 102. The side walls of the corresponding mounting groove are respectively provided with a positioning bar 103. In the embodiment of the present application, the positioning bar 103 and the positioning groove 104 lock the shaft locating seat 102 in the mounting groove, thereby preventing the shaft locating seat 102 from sliding in the horizontal direction.
[0038] Based on the above embodiment, a positioning portion 105 is connected to the bottom edge of the base 101 in the embodiment of the present application. The positioning portion 105 is provided with a positioning hole 106 . The positioning hole 106 is used to cooperate with a positioning pin to fix the base 101 .
[0039] The embodiment of the present application does not specifically limit the number of the positioning portions 105. The number of the positioning portions 105 can be multiple, and the multiple positioning portions 105 are spaced apart along the bottom edge of the base 101. Figure 3 As shown, four positioning portions 105 are provided, and the four positioning portions 105 are respectively provided at the four corners of the bottom edge of the base 101 .
[0040] Finally, an embodiment of the present application also provides a pressing device, comprising a press and the aforementioned positioning device. The shaft body 4 is placed in the groove 6 of the shaft positioning seat 102, with the keyway 401 facing upward. The distance between the first fixed plate 2 and the second fixed plate 3 is adjusted according to the width of the flat key 5. The first and second fixed plates 2 and 3 are secured by tightening the knob 8. The flat key 5 is placed in the keyway 401 through the gap between the first and second fixed plates 2 and 3, and then the flat key 5 is pressed into the keyway 401 of the shaft body 4 using a press.
[0041] A pressing device provided in an embodiment of the present application includes a press and a positioning device, the positioning device including: a support seat 1, a first fixed plate 2 and a second fixed plate 3; the top surface of the support seat 1 is provided with a groove 6, the groove 6 is used to place the shaft body 4 provided with a keyway 401, the first fixed plate 2 and the second fixed plate 3 are arranged on the top surface of the support seat 1, and the first fixed plate 2 and the second fixed plate 3 are respectively located on both sides of the groove 6, a first step cut 201 is provided on one side of the bottom of the first fixed plate 2, and a second step cut 301 is provided on one side of the bottom of the second fixed plate 3, the step surface of the first step cut 201 and the step surface of the second step cut 301 are respectively abutted on both sides of the keyway 401, and the side of the first fixed plate 2 with the first step cut 201 and the side of the second fixed plate 3 with the second step cut 301 are respectively used to abut the two sides of the flat key 5. The shaft body 4 is fixed by the groove 6, the step surface of the first step cut 201 and the step surface of the second step cut 301. When the flat key 5 is placed on the key groove 401 of the shaft body 4, the side surface of the first fixed disk 2 and the side surface of the first fixed disk 2 respectively abut against the two sides of the flat key 5, which can effectively prevent the flat key 5 from being skewed, thereby ensuring that the flat key 5 is pressed in vertically, so that the flat key 5 in the key groove 401 is pressed into place.
[0042] The above is a detailed introduction to the positioning device and pressing device for press-fitting a flat key into a keyway with an interference fit provided by the present application. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to in detail. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.
[0043] It should also be noted that, in this specification, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.
Claims
1. A positioning device in which a flat key is pressed into a keyway with an interference fit, characterized in that: include: A support base (1), a first fixed plate (2), and a second fixed plate (3); The top surface of the support seat (1) is provided with a groove (6), and the groove (6) is used to place the shaft body (4) provided with a keyway (401). The first fixed plate (2) and the second fixed plate (3) are provided on the top surface of the support seat (1), and the first fixed plate (2) and the second fixed plate (3) are respectively located on both sides of the groove (6). A first step cut (201) is provided on one side of the bottom of the first fixed plate (2), and a second step cut (301) is provided on one side of the bottom of the second fixed plate (3). The step surface of the first step cut (201) and the step surface of the second step cut (301) are respectively abutted against both sides of the keyway (401). The side surface of the first fixed plate (2) provided with the first step cut (201) and the side surface of the second fixed plate (3) provided with the second step cut (301) are respectively used to abut against both sides of the flat key (5).
2. The positioning device for press-fitting a flat key into a keyway through interference fit according to claim 1, characterized in that: The first fixed plate (2) and the second fixed plate (3) are arranged on the top surface of the support seat (1) in an adjustable manner so as to change the distance between the first fixed plate (2) and the second fixed plate (3).
3. The positioning device for press-fitting a flat key into a keyway through interference fit according to claim 2, characterized in that: The first fixing plate (2) and the second fixing plate (3) are both provided with an oblong hole (7), and screw holes (9) are respectively provided on both sides of the top surface of the support seat (1). The tail of the knob (8) passes through the oblong hole (7) and is threadedly connected to the screw hole (9). The head of the knob (8) is provided with a knob cap, and the length of the knob cap is greater than the width of the oblong hole (7). The knob (8) can be moved in the length direction of the oblong hole (7) to change the distance between the first fixing plate (2) and the second fixing plate (3).
4. The positioning device for press-fitting a flat key into a keyway through interference fit according to claim 2, characterized in that: The top surface of the support seat (1) is rotatably connected to a first screw rod and a second screw rod, the first screw rod and the second screw rod are horizontally arranged on both sides of the groove (6), the first screw rod is connected to a first nut via a thread, the second screw rod is connected to a second nut via a thread, the first nut is connected to the bottom of the first fixed plate (2), and the second nut is connected to the bottom of the second fixed plate (3).
5. The positioning device for press-fitting a flat key into a keyway through interference fit according to claim 3, characterized in that: The support seat (1) comprises a base (101) and an axis positioning seat (102), the groove (6) is provided on the axis positioning seat (102), the screw holes (9) are respectively provided on both sides of the top surface of the base (101), and the two screw holes (9) are respectively located on both sides of the groove (6), and the base (101) and the axis positioning seat (102) are detachably connected.
6. The positioning device for press-fitting a flat key into a keyway through interference fit according to claim 5, characterized in that: The base (101) is provided with a mounting groove for placing the shaft positioning seat (102); when the shaft positioning seat (102) is nested in the base (101) through the mounting groove, the top surface of the shaft positioning seat (102) is flush with the top surface of the base (101).
7. The positioning device for press-fitting a flat key into a keyway through interference fit according to claim 6, characterized in that: The side wall of the installation groove is provided with a positioning strip (103), the side wall of the shaft positioning seat (102) is provided with a positioning slot (104) that matches the positioning strip (103), and the shaft positioning seat (102) is embedded in the installation groove through the positioning strip (103) and the positioning slot (104).
8. The positioning device for press-fitting a flat key into a keyway through interference fit according to claim 5, characterized in that: The bottom edge of the base (101) is connected to a positioning portion (105), and the positioning portion (105) is provided with a positioning hole (106), and the positioning hole (106) is used to cooperate with a positioning pin to fix the base (101).
9. The positioning device for press-fitting a flat key into a keyway through interference fit according to claim 8, characterized in that: There are multiple positioning portions (105), and the multiple positioning portions (105) are arranged at intervals along the bottom edge of the base (101).
10. A pressing device, characterized in that: The invention comprises a press and the positioning device according to any one of claims 1 to 9.