Bolt with adjustable extension length
By combining the lead screw and lead screw nut with the motor design and integrating a programmable logic controller, the problem of the non-adjustable extension length of the pin was solved, realizing flexible adjustment and precise control of the pin rod length, thus improving the applicability and stability of the pin.
Patent Information
- Application Number
- CN202520350302.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2035-02-28
AI Technical Summary
The existing pins have a fixed and non-adjustable extension length, which limits their wide application and flexibility, and increases the complexity of production and management.
The design employs a combination of a lead screw and a lead screw nut with a motor, converting the rotational motion of the motor into the linear motion of the pin rod. Combined with a programmable logic controller (PLC), this enables precise adjustment and control of the pin rod length.
It enables flexible adjustment and precise control of the pin length, reduces production costs and management complexity, and improves the applicability and stability of the pin.
Smart Images
Figure CN223594669U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of bolt, especially the bolt with adjustable extension length. BACKGROUND
[0002] As a key connecting and locking device, the bolt plays an indispensable role in many experimental devices, mechanical equipment and industrial components. However, the extension length of the bolt in the prior art is fixed, and it can only be applied to a lock hole with a specific depth, which greatly limits the universality and flexibility of its application. Specifically, the design of the traditional bolt often follows the principle of fixed extension length, that is, the extension length of the bolt is preset and cannot be adjusted. Although this design can meet some basic locking needs, when facing complex and variable experimental devices or mechanical equipment, different extension lengths of the bolt are often required to adapt to lock holes with different depths, or the extension length requirements of the bolt at different positions are different due to the installation position of the bolt. If a bolt with a specific extension length is customized for each lock hole, not only the production cost will be greatly increased, but also the complexity of use and management will be increased. Therefore, in order to solve the problem that the extension length of the bolt in the prior art is fixed and cannot be adjusted, it is particularly important to find a new type of bolt solution. SUMMARY
[0003] The utility model aims at overcoming the problem that the extension length of the bolt in the prior art is fixed and cannot be adjusted, and provides a bolt with adjustable extension length.
[0004] In the first aspect, the utility model provides a bolt with adjustable extension length, which comprises a bolt rod, a lead screw, a motor and a lead screw nut.
[0005] The lead screw nut and the lead screw are threadedly connected.
[0006] The lead screw is connected with the motor, and the motor can drive the lead screw nut to move axially along the lead screw reciprocatingly.
[0007] The bolt rod is connected with the lead screw nut, and the movement of the lead screw nut can drive the movement of the bolt rod along the length direction of the lead screw.
[0008] The utility model provides a kind of bolt of adjustable extension length, the combination of lead screw and lead screw nut can convert the rotary motion generated by motor into linear motion, in this mechanism, the bolt rod can be driven by lead screw nut and make linear motion along the length direction of lead screw.The forward rotation or reverse rotation of motor corresponds the extension or retraction action of bolt rod respectively.The specific length of the extension of bolt rod is directly related to the running time of motor, therefore, by controlling the running time of motor, the extension length of bolt rod can be accurately adjusted.Further solve the problem that bolt extension length is fixed and not adjustable in prior art.
[0009] The motor can be a DC motor, an AC motor or a stepper motor.
[0010] The connection between the lead screw and the motor can be through a gear or a shaft coupling, or the lead screw and the motor shaft of the motor can be connected by coaxial welding.
[0011] The bolt rod can be fixed on the lead screw nut or connected to the lead screw nut through other components.
[0012] Preferably, the bolt rod and the lead screw nut are detachably connected through a connecting block. The connecting block improves the layout flexibility of the connecting part of the bolt rod and the lead screw nut, and further makes the position adjustment of the bolt rod relative to the lead screw nut more flexible and variable, improving the applicability and application range of the entire bolt.
[0013] The detachable connection can be threaded connection, buckle connection or slot and locking mechanism connection. The detachable connection allows users to conveniently replace bolt rods of different lengths or diameters according to actual needs, thereby greatly improving the adaptability and flexibility of the entire bolt. At the same time, since the bolt rod is detachable, it is easier to check and replace damaged or worn bolt rods, reducing maintenance cost and time.
[0014] Preferably, it further includes a fixing structure, the connecting block is sleeved outside the lead screw nut, a first through hole is provided on the connecting block, the first through hole is arranged in parallel with the lead screw, an annular boss is inwardly protruded on the inner wall of the first through hole, the end of the bolt rod extends into the first through hole, the end of the fixing structure extends into the first through hole from the end of the bolt rod away from the first through hole, and the fixing structure is connected to the bolt rod by penetrating the annular boss, so that the bolt rod and the fixing structure clamp the annular boss from both sides of the annular boss.
[0015] This scheme connects the bolt rod to the first through hole on the connecting block through the fixing structure, thereby establishing a convenient detachable connection.
[0016] Preferably, a flange part is arranged radially outward from the end of the bolt rod towards the screw nut, the flange part is detachably connected with the connecting block, the flange part covers at least part of the first through hole, and limits the fixed structure in the axial direction of the bolt rod. This scheme can effectively realize the fixing effect of the fixed structure by using the flange part.
[0017] Preferably, a shell is further included, the shell is provided with a cavity, both ends of the cavity are respectively an opening and an end plate, a motor base is connected to the opening end of the shell, the motor base is connected with the motor, the screw rod and the screw nut are located in the cavity, both ends of the screw rod are respectively supported on the motor base and the end plate of the shell, a second through hole is arranged on the end plate of the shell, and the bolt rod passes through the second through hole. The shell not only has the function of protecting the internal structure, but also serves as a support frame for installing the screw rod, the screw nut and the bolt rod.
[0018] Preferably, a bearing is arranged at the connection between the screw rod and the end plate of the shell. The bearing not only supports the screw rod, but also reduces the friction resistance when the screw rod rotates, thereby improving the working efficiency of the overall bolt. Through the bearing, the deflection and vibration of the screw rod can be reduced, thereby improving the stability of the overall bolt.
[0019] Preferably, a sleeve is arranged at the second through hole, and the bolt rod passes through the sleeve. The sleeve can provide positioning and guiding functions for the bolt rod, and at the same time, the sleeve can reduce direct friction and wear between the bolt rod and the surrounding structure, so that the bolt rod can smoothly perform the extension or retraction operation, thereby improving the stability of use and prolonging the service life of the overall bolt.
[0020] Preferably, the motor is a stepper motor, the screw rod is connected with a motor shaft of the stepper motor, and the axis of the screw rod is consistent with the axis of the motor shaft. Compared with ordinary motors, the stepper motor can realize more accurate position control and speed control, is more conducive to accurately adjusting the extension length of the bolt rod, and can accurately control the speed of the bolt rod within the allowable range during extension and retraction, thereby reducing the impact and vibration that the bolt rod may generate when contacting precision instruments or equipment. This scheme coaxially connects the screw rod with the motor shaft, not only improves the conversion efficiency of kinetic energy, but also reduces the occupation of radial space, and can enhance the compactness and running stability of the overall bolt.
[0021] Preferably, the bolt rod is parallel to the screw rod; and / or, the maximum movable stroke of the bolt rod is 15mm to 40mm; and / or, the moving speed of the bolt rod is 0.1mm / s to 50mm / s.
[0022] In a second aspect, the present invention provides a pin with a settable extension length, including a programmable logic controller and a pin with an adjustable extension length. The programmable logic controller is connected to an external power supply and the motor respectively, and the programmable logic controller can control the running time of the motor.
[0023] This invention provides a pin with a settable extension length. The running time and rotation speed of the motor can be set through the programming interface of a programmable logic controller (PLC). When the PLC receives a pin extension command, it controls the motor to run at the preset rotation speed. After the motor has run for the preset time, the PLC stops the motor, causing the pin to remain at the set extension length. This design allows users to flexibly set the extension length of the pin according to actual needs. In subsequent operations, simply issuing an extension or retraction command achieves effective control of the pin, thus enabling the preset extension length function.
[0024] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0025] 1. This utility model provides a pin with an adjustable extension length. The combination of the lead screw and the lead screw nut converts the rotational motion generated by the motor into linear motion, driving the pin rod to move linearly. By controlling the running time of the motor, the extension length of the pin rod can be accurately adjusted. This solves the problem that the extension length of the pin in the prior art is fixed and non-adjustable.
[0026] 2. This utility model provides a pin with a settable extension length. By adding a programmable logic controller, the user can flexibly set the extension length of the pin according to actual needs. In subsequent operations, the user only needs to issue an extension or retraction command to effectively control the pin, thereby realizing the function of preset pin extension length. Attached Figure Description
[0027] Figure 1 This is a top partial cross-sectional view of the pin in Example 1.
[0028] Figure 2 for Figure 1 Detailed map of area A in the middle.
[0029] Figure 3 This is a three-dimensional schematic diagram of the pin in Example 1.
[0030] Figure 4 This is a front view of the pin in Example 1.
[0031] Figure 5 Left view of the latch of Example 1.
[0032] Figure 6 First schematic view of the connecting block of Example 1.
[0033] Figure 7 Second schematic view of the connecting block of Example 1.
[0034] Marked in the figure:
[0035] 1 - Latch rod,
[0036] 2 - Screw,
[0037] 3 - Housing,
[0038] 301 - Second through hole,
[0039] 4 - Motor base,
[0040] 5 - Motor,
[0041] 6 - Screw nut,
[0042] 601 - Flange portion,
[0043] 7 - Connecting block,
[0044] 701 - First through hole, 702 - Annular boss,
[0045] 8 - Bearing,
[0046] 9 - Sleeve,
[0047] 10 - Fixing structure. DETAILED DESCRIPTION
[0048] The utility model will be described in further detail below in combination with specific embodiments. However, this should not be understood as the scope of the above-mentioned subject matter of the utility model being limited to the following embodiments only, and any technology realized based on the content of the utility model falls within the scope of the utility model.
[0049] In the description of the specific embodiments of the utility model, the orientation or position relationship expression terms appearing in the description, such as "up", "down", "left", "right", "center", "inner", "outer", etc., are based on the orientation or position relationship expressed in the drawings, or are the orientation or position relationship when the product / equipment / device of the utility model is usually used. These orientation or position relationship terms are only used to facilitate the description of the utility model scheme or to simplify the description in the specific embodiments, so as to facilitate the quick understanding of the scheme by the technicians, and are not intended to indicate or imply that a specific device / component / element must have a specific orientation or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the utility model.
[0050] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding device / component / element is required to be absolutely horizontal or vertical or overhanging or parallel, but can be slightly inclined or have a deviation. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined. Alternatively, it can be simplified to understand that the corresponding device / component / element is arranged in the direction of "horizontal", "vertical", "overhanging", "parallel" and the like, and can have an error / deviation of ±10% relative to the corresponding direction, more preferably an error / deviation of ±8%, more preferably an error / deviation of ±6%, more preferably an error / deviation of ±5%, more preferably an error / deviation of ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the utility model scheme.
[0051] In addition, the terms "first", "second", "third" and the like in the terms are only used to distinguish the same or similar components for description, and should not be understood as emphasizing or implying the relative importance of the specific components.
[0052] In addition, in the description of the embodiments of the utility model, "several", "a plurality of", "several" represent at least 2. It can be 2, 3, 4, 5, 6, 7, 8, 9 and the like in any case, and even more than 9.
[0053] In addition, in the description of the technical scheme of the utility model, unless otherwise specified / limited / limited, the terms "arrangement", "installation", "connection", "connection", "provided with", "laid", "arrangement" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, which can be welding, riveting, bolting, screw connection and other commonly used connection means in the art. The connection can be mechanical connection, electrical connection or communication connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements.
[0054] Embodiment 1
[0055] As shown in Figures 1 to 7 A length-adjustable bolt includes a bolt rod 1, a lead screw 2, a motor 5 and a lead screw nut 6.
[0056] The lead screw nut 6 and the lead screw 2 are threadedly connected.
[0057] The lead screw 2 is connected with the motor 5, and the motor 5 can drive the lead screw nut 6 to move reciprocatingly along the lead screw 2 in the axial direction. The diameter of the lead screw 2 can be 8mm.
[0058] The latch rod 1 is connected with the screw nut 6, and the movement of the screw nut 6 can drive the movement of the latch rod 1 along the length direction of the screw rod 2. The diameter of the latch rod 1 can be 10 mm.
[0059] When the motor 5 drives the screw rod 2 to rotate forward, the screw nut 6 can drive the latch rod 1 to move in the extending direction; on the contrary, when the motor 5 drives the screw rod 2 to rotate reversely, the screw nut 6 can drive the latch rod 1 to move in the retracting direction.
[0060] In an optional embodiment, the latch rod 1 and the screw nut 6 can be detachably connected through the connecting block 7.
[0061] In an optional embodiment, the fixing structure 10 can be further included, the connecting block 7 can be sleeved outside the screw nut 6, the first through hole 701 is arranged on the connecting block 7 and is parallel to the screw rod 2, the annular boss 702 is inwardly protruded on the inner wall of the first through hole 701, the end of the latch rod 1 extends into the first through hole 701, the end of the fixing structure 10 extends into the first through hole 701 from the end of the first through hole 701 away from the latch rod 1, and the fixing structure 10 is connected with the latch rod 1 by penetrating through the annular boss 702, so that the latch rod 1 and the fixing structure 10 clamp the annular boss 702 from both sides of the annular boss 702.
[0062] In an optional embodiment, the end of the screw nut 6 away from the latch rod 1 can be provided with a flange part 601 extending radially outward from the screw nut 6, the flange part 601 is detachably connected with the connecting block 7, the flange part 601 covers at least part of the aperture of the first through hole 701, and forms a limiting position of the fixing structure 10 along the axial direction of the latch rod 1.
[0063] Specifically, the screw nut 6 and the connecting block 7 are connected through four bolts, the connection between the latch rod 1 and the fixing structure 10 is a threaded connection, an inwardly recessed groove is arranged on the end face of the end of the latch rod 1 inserted into one end of the first through hole 701, a thread is arranged on the inner wall of the groove, and a thread matched with the inner wall of the groove is arranged on the end of the fixing structure 10 connected with the latch rod 1. The connecting block 7 is a cuboid with a round corner, and the size is specifically: 32 mm in length, 30 mm in width, and 12 mm in thickness.
[0064] In an optional embodiment, the shell 3 is provided with a cavity, the two ends of the cavity are respectively an opening and an end plate, the opening end of the shell 3 is connected with the motor base 4, the other side of the motor base 4 is connected with the motor 5, the lead screw 2 and the lead screw nut 6 are located in the cavity, the two ends of the lead screw 2 are respectively supported on the motor base 4 and the end plate of the shell 3, the end plate of the shell 3 is provided with a second through hole 301, and the latch rod 1 passes through the second through hole 301. Specifically, the motor base 4 and the shell 3 jointly form the skeleton of the latch, and the motor 5 is fixed on the motor base 4 by bolts. The connecting block 7 is also arranged in the cavity. The distance between the axis of the lead screw 2 and the axis of the latch rod 1 can be 10mm-15mm, and the specific distance can be 10mm, 11mm, 12mm, 13mm, 14mm and 15mm.
[0065] In an optional embodiment, a bearing 8 is arranged at the connection between the lead screw 2 and the end plate of the shell 3. Specifically, the outer ring of the bearing 8 is connected with the end plate of the shell 3, and the inner ring of the bearing 8 is connected with the lead screw 2.
[0066] In an optional embodiment, a sleeve 9 can be arranged at the second through hole 301, and the latch rod 1 passes through the sleeve 9. Lubricating oil can be added between the latch rod 1 and the sleeve 9, which can further improve the smoothness of the extension or retraction operation of the latch rod 1.
[0067] In an optional embodiment, the motor 5 can be a stepper motor, the lead screw 2 is connected with the motor shaft of the stepper motor, and the axis of the lead screw 2 is consistent with the axis of the motor shaft. Specifically, the lead screw 2 is connected with the motor shaft of the stepper motor through a shaft coupling.
[0068] In an optional embodiment, the latch rod 1 can be parallel to the lead screw 2; and / or, the maximum movable stroke of the latch rod 1 can be 15mm to 40mm, and the specific maximum stroke can be 15mm, 18mm, 20mm, 24mm, 25mm, 28mm, 30mm, 32mm, 35mm, 38mm, 40mm; and / or, the moving speed of the latch rod 1 can be 0.1mm / s to 50mm / s. The specific speed can be 0.1mm / s, 0.2mm / s, 0.5mm / s, 0.8mm / s, 1mm / s, 2mm / s, 4mm / s, 5mm / s, 8mm / s, 10mm / s, 15mm / s, 20mm / s, 25mm / s, 28mm / s, 30mm / s, 32mm / s, 40mm / s, 45mm / s, 50mm / s.
[0069] The moving speed of the latch rod 1 is determined by the rotation rate of the motor 5 and the distance corresponding to the movement of the latch rod 1 when the motor 5 rotates one circle, so the moving speed of the latch rod 1 can be controlled by controlling the rotation rate of the motor 5.
[0070] Herein, a certain latch is taken as an example for detailed description. The maximum movable stroke of the latch rod 1 of the latch is 20mm, and the moving speed thereof is 1mm / s. If the length of the latch rod 1 to be extended is 10mm or 20mm, the following control method can be adopted: when the latch rod 1 needs to be extended by 10mm and the latch rod 1 is in the fully retracted state, the corresponding motor 5 is controlled to run for 10 seconds; when the latch rod 1 needs to be extended by 20mm and the latch rod 1 is in the fully retracted state, the corresponding motor 5 is controlled to run for 20 seconds. In this way, by controlling the running time of the motor 5, the requirement of the latch rod 1 to be extended by different lengths can be met.
[0071] Embodiment 2
[0072] This embodiment is a latch with settable extension length, which is based on Embodiment 1 and additionally comprises a programmable logic controller (PLC). The PLC is connected with an external power supply and the motor 5 respectively, and can control the running time of the motor 5. The PLC is not shown in the figure.
[0073] Herein, a certain latch with settable extension length is taken as an example for detailed description. The maximum movable stroke of the latch rod 1 of the latch is 30mm. If the length of the latch rod 1 to be extended is 15mm, the following method can be adopted: the running time of the motor 5 is set to 15 seconds and the rotation rate is set to one circle per second through the programming interface of the PLC, and one circle of the motor 5 corresponds to a moving distance of 1mm of the latch rod 1. After the above setting is completed, the program is written into the PLC corresponding to the latch.
[0074] Thereafter, when the latch corresponding PLC receives an extension instruction of the latch, the motor 5 will be controlled to run at the rotation rate of one circle per second for 15 seconds. In this way, the latch rod 1 will be extended by the expected length of 15mm.
[0075] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A latch having an adjustable extension length, characterized in that The utility model relates to a kind of insertion pin rod, including: Bolt rod (1), lead screw (2), motor (5) and lead screw nut (6); The lead screw nut (6) and the lead screw (2) are threadedly engaged; The lead screw (2) is connected with the motor (5), and the motor (5) can drive the lead screw nut (6) to move reciprocatingly along the lead screw (2) axially; The bolt rod (1) is connected with the lead screw nut (6), and the movement of the lead screw nut (6) can drive the bolt rod (1) to move along the length direction of the lead screw (2).
2. A retractable bolt according to claim 1, wherein, The bolt rod (1) and the lead screw nut (6) are detachably connected through connecting block (7).
3. A retractable bolt according to claim 2, wherein, Further including fixed structure (10), the connecting block (7) is sleeved on the outer side of the lead screw nut (6), the first through hole (701) is provided on the connecting block (7), the first through hole (701) is arranged in parallel with the lead screw (2), the inner wall of the first through hole (701) is inwardly provided with annular boss (702), the end of the bolt rod (1) is inserted into the first through hole (701), the end of the fixed structure (10) is inserted into the first through hole (701) from the end of the first through hole (701) away from the bolt rod (1), and is connected with the bolt rod (1) by passing through the annular boss (702), so that the bolt rod (1) and the fixed structure (10) clamp the annular boss (702) from both sides of the annular boss (702).
4. A projection length adjustable bolt according to claim 3, wherein The end of the lead screw nut (6) away from the bolt rod (1) is provided with flange portion (601) outwardly along the radial direction of the lead screw nut (6), the flange portion (601) is detachably connected with the connecting block (7), the flange portion (601) covers at least a part of the aperture of the first through hole (701), and forms a limit for the fixed structure (10) along the axial direction of the bolt rod (1).
5. A latch of adjustable extension length according to any one of claims 1 to 4, wherein Further including shell (3), the shell (3) is provided with a cavity, the two ends of the cavity are opening and end plate respectively, the opening end of the shell (3) is connected with motor base (4), the motor base (4) is connected with the motor (5), the lead screw (2) and the lead screw nut (6) are located in the cavity, the two ends of the lead screw (2) are supported on the motor base (4) and the end plate of the shell (3) respectively, the second through hole (301) is provided on the end plate of the shell (3), and the bolt rod (1) passes through the second through hole (301).
6. A retractable bolt according to claim 5, wherein, The connecting place of the lead screw (2) and the end plate of the shell (3) is provided with bearing (8).
7. A retractable bolt according to claim 5 wherein, The second through hole (301) is provided with sleeve (9), and the bolt rod (1) passes through the sleeve (9).
8. A retractable bolt according to claim 5 wherein, The motor (5) is a stepper motor, the lead screw (2) is connected with the motor shaft of the stepper motor, and the axis of the lead screw (2) is consistent with the axis of the motor shaft.
9. A latch of adjustable extension length according to any one of claims 1-4, characterized in that The bolt rod (1) is parallel with the lead screw (2);And / or, the maximum movable stroke of the bolt rod (1) is 15mm to 40mm;And / or, the speed of the bolt rod (1) is 0.1mm / s to 50mm / s.
10. A settable extension length bolt, characterized by, The adjustable length bolt comprises a programmable logic controller connected with an external power supply and the motor (5) respectively, and the programmable logic controller can control the running time of the motor (5).