Pressure-adjustable jig

Abstract

The utility model discloses a pressure adjustable jig, including fixed base, its vertical slide way is equipped with adjusting bolt, inner cover, elastic part and clamping piece. Through adjusting bolt position change elastic piece compression, can adjust the pressure of inner cover to work piece, vertical slide way is set up in sections, and cooperation fixed cover, press pin etc. Component guarantees structure stability and pressure transmission even, and adjusting bolt is matched locking nut and realizes pressure locking, and clamping piece contains the bushing of strip elastic groove and O type ring, and the adaptability and protective property of clamping are promoted, and the bushing is installed through bearing and reduces friction. The utility model can be flexible adaptation different work piece pressure demand, and the structure is reliable, and the clamping precision is high, and the life is long.

Description

Technical Field

[0001] This utility model relates to the field of jig technology, and in particular to a pressure-adjustable jig. Background Technology

[0002] In the grinding process of micro-stepped shafts, the force applied to the workpiece by existing jigs is not adjustable and can easily affect or damage the workpiece, especially when the workpiece itself has low hardness. Therefore, developing jigs with adjustable pressure is of great significance for reducing workpiece damage during machining. Utility Model Content

[0003] This invention addresses the problem of non-adjustable fixture pressure during machining by providing an adjustable fixture that reduces damage to the workpiece.

[0004] This utility model provides the following technical solution: a pressure-adjustable fixture, including a fixed base, a vertical slide rail extending vertically through the fixed base along its central axis, an adjusting bolt movable in the vertical direction installed at the upper end of the vertical slide rail, a clamping member for clamping a workpiece installed at the lower end of the vertical slide rail, the workpiece being inserted into the central through hole of the clamping member, an inner sleeve movable in the vertical direction provided in the vertical slide rail, the inner sleeve being connected to the adjusting bolt through an elastic element, when the workpiece is installed in the clamping member, the upper end of the workpiece abuts against the lower end face of the inner sleeve, by adjusting the position of the adjusting bolt on the vertical slide rail, the compression of the elastic element is adjusted, thereby changing the pressure applied by the inner sleeve to the workpiece.

[0005] In some embodiments, the vertical slide rail consists of an adjustment section, a sliding section, and a mounting section from top to bottom, and the apertures of the mounting section and the adjustment section are both larger than the aperture of the sliding section.

[0006] In some embodiments, the adjusting part is connected to a fixed sleeve via an internal thread. The fixed sleeve has a sliding through hole along its central axis. The rod of the adjusting bolt is threaded to the upper end of the sliding through hole, and the inner sleeve can be slidably installed in the sliding through hole.

[0007] In some embodiments, a blind hole is provided at the central axis of the inner sleeve, the opening of the blind hole is located on the upper end face of the inner sleeve, the elastic element is accommodated in the blind hole, a pressure pin is provided between the inner sleeve and the adjusting bolt, the rod of the pressure pin is inserted into the blind hole, the lower end face of the rod of the pressure pin abuts against the upper end face of the elastic element, and the upper end face of the pressure pin abuts against the lower end face of the adjusting bolt.

[0008] In some embodiments, the shank of the adjusting bolt is threaded with a locking nut. After the fixture has adjusted the pressure on the workpiece, the locking nut can be tightened onto the upper end face of the fixing sleeve to lock the position of the adjusting bolt.

[0009] In some embodiments, the clamping member is installed in the mounting part. The clamping member includes a bushing. A mounting through hole for mounting a workpiece is provided at the central axis of the bushing. A plurality of strip-shaped elastic grooves are provided circumferentially spaced on the outer peripheral wall of the lower end of the bushing. The elastic grooves are used to allow the lower end of the bushing to undergo elastic deformation when the workpiece is inserted into the mounting through hole.

[0010] In some embodiments, the clamping member includes an O-ring, and an annular groove is formed on the outer peripheral wall of the lower section of the bushing, and the O-ring is accommodated in the annular groove.

[0011] In some embodiments, the bushing is mounted within the mounting section via a bearing.

[0012] Compared with the prior art, the advantages of this utility model are:

[0013] 1. The pressure can be flexibly adjusted: By adjusting the position of the bolt on the vertical slide, the compression of the elastic element can be directly changed, thereby precisely adjusting the pressure applied by the inner sleeve to the workpiece. It can adapt to the clamping pressure requirements of different workpieces and has greater versatility.

[0014] II. Stable and reliable structural design: The vertical slide is set in sections, and each component can be precisely positioned and installed according to its function, which ensures the stability of the overall structure and the guidance of the movement of each component, reduces shaking or offset, and improves the reliability of operation.

[0015] 3. Direct and uniform pressure transmission: The inner sleeve cooperates with the adjusting bolt and elastic element through the pressure pin. The elastic element is housed in the blind hole of the inner sleeve, which makes the pressure transmission path clear, avoids the elastic element from shifting, ensures that the pressure of the inner sleeve on the workpiece is uniform and stable, and improves the clamping accuracy.

[0016] IV. Reliable pressure locking function: The adjusting bolt, in conjunction with the locking nut, can lock the position after the pressure adjustment is completed, preventing pressure changes caused by vibration and other factors during operation and ensuring the stability of the clamping pressure.

[0017] V. Strong clamping adaptability and workpiece protection: The lower end of the bushing of the clamping component is provided with a strip elastic groove, which allows it to undergo elastic deformation, making it easy to insert the workpiece. At the same time, it can adapt to the slight differences in the size of the workpiece and enhance the clamping stability. When used with an O-ring, the cushioning and sealing of the clamping can be further improved, reducing damage to the workpiece.

[0018] VI. Low friction loss and extended service life: The bushing is installed in the mounting part through the bearing, which effectively reduces the friction between the bushing and the fixed seat, reduces component wear, extends the service life of the fixture, and makes the bushing move more smoothly. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments 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.

[0020] Figure 1 This is a schematic diagram of the structure of the present invention in the workpiece clamping state;

[0021] Figure 2 This is a cross-sectional structural diagram of the present invention in the workpiece clamping state;

[0022] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0023] Figure 4 This is a schematic diagram of the exploded structure of this utility model;

[0024] Figure 5 This is a schematic diagram of the structure of the fixing sleeve of this utility model;

[0025] Figure 6 This is a schematic diagram of the inner sleeve of this utility model;

[0026] Figure 7 This is a schematic diagram of the structure of the fixing base of this utility model;

[0027] Figure 8 This is a cross-sectional structural diagram of the fixing base of this utility model;

[0028] Figure 9 This is a schematic diagram of the bushing structure of this utility model.

[0029] In the diagram: 1. Fixed seat; 11. Vertical slide rail; 12. Adjustment part; 13. Sliding part; 14. Mounting part; 2. Adjusting bolt; 3. Clamping part; 31. Bushing; 32. Elastic groove; 33. O-ring; 34. Bearing; 35. Mounting through hole; 36. Annular groove; 4. Inner sleeve; 41. Blind hole; 5. Elastic element; 6. Fixed sleeve; 61. Sliding through hole; 7. Pressure pin; 8. Locking nut; 9. Workpiece. Detailed Implementation

[0030] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0031] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0033] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0034] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0035] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0036] Please see Figure 1-4As shown in this embodiment: a pressure-adjustable fixture includes a fixed base 1. The fixed base 1 has a vertical slide 11 extending vertically along its central axis. An adjusting bolt 2 that can move in the vertical direction is installed at the upper end of the vertical slide 11. A clamping member 3 for clamping a workpiece 9 is installed at the lower end of the vertical slide 11. The workpiece 9 is inserted into the central through hole of the clamping member 3. An inner sleeve 4 that can slide in the vertical direction is provided in the vertical slide 11. The inner sleeve 4 and the adjusting bolt 2 are connected by an elastic member 5. When the workpiece 9 is installed in the clamping member 3, the upper end of the workpiece 9 abuts against the lower end face of the inner sleeve 4. By adjusting the position of the adjusting bolt 2 on the vertical slide 11, the compression amount of the elastic member 5 is adjusted, thereby changing the pressure applied by the inner sleeve 4 to the workpiece 9.

[0037] It should be noted that the elastic element 5 is a spring.

[0038] In some embodiments, such as Figures 7-8 As shown, the vertical slide 11 consists of an adjustment section 12, a sliding section 13, and a mounting section 14 from top to bottom. The apertures of the mounting section 14 and the adjustment section 12 are larger than the aperture of the sliding section 13. It should be noted that this segmented aperture design provides precise installation and positioning space for each functional component: the large apertures of the adjustment section 12 and the mounting section 14 can be adapted to larger components such as the fixed sleeve 6 and the clamping component 3, ensuring their stable assembly; the small aperture of the sliding section 13 can provide precise guidance for the inner sleeve 4 inside, limiting the radial displacement of the inner sleeve 4 during the sliding process and ensuring the axial transmission accuracy of the pressure of the inner sleeve 4 on the workpiece 9. At the same time, the stepped structure formed by different apertures can provide axial positioning for the fixed sleeve 6, the clamping component 3, etc., preventing them from accidentally shifting during operation, further improving the assembly stability and motion reliability of the overall structure. Each segment has a clear function and does not interfere with each other, facilitating the individual disassembly and maintenance of components.

[0039] In some embodiments, such as Figures 5-8 As shown, the adjusting part 12 is connected to the fixed sleeve 6 via an internal thread. The fixed sleeve 6 has a sliding through hole 61 along its central axis. The rod of the adjusting bolt 2 is threaded to the upper end of the sliding through hole 61. The inner sleeve 4 can be slidably installed in the sliding through hole 61. It should be noted that the internal thread connection between the adjusting part 12 and the fixed sleeve 6 enables the quick disassembly and fine-tuning of the fixed sleeve 6. The sliding through hole 61 of the fixed sleeve 6 serves as a unified guiding reference, allowing the thread adjustment of the adjusting bolt 2 and the sliding movement of the inner sleeve 4 to share the same axis. This effectively avoids radial misalignment caused by assembly deviations and ensures a linear correspondence between the compression of the elastic element 5 and the pressure of the inner sleeve 4.

[0040] In some embodiments, such as Figure 6As shown, a blind hole 41 is provided at the central axis of the inner sleeve 4. The opening of the blind hole 41 is located on the upper end face of the inner sleeve 4. The elastic element 5 is housed in the blind hole 41. A pressure pin 7 is provided between the inner sleeve 4 and the adjusting bolt 2. The rod of the pressure pin 7 is inserted into the blind hole 41. The lower end face of the rod of the pressure pin 7 abuts against the upper end face of the elastic element 5, and the upper end face of the pressure pin 7 abuts against the lower end face of the adjusting bolt 2. It should be noted that the blind hole 41 of the inner sleeve 4 provides axial constraint space for the elastic element 5, which can effectively prevent the elastic element 5 from shifting laterally or tilting during compression or rebound. The angled design ensures that the elastic force always acts on the workpiece 9 axially. The setting of the pressure pin 7 forms a rigid transition structure, which not only avoids the local stress concentration caused by the direct contact between the adjusting bolt 2 and the elastic element 5, but also uniformly converts the displacement of the adjusting bolt 2 into the compression of the elastic element 5, making the pressure adjustment more linear and controllable. In addition, the insertion and cooperation between the pressure pin 7 and the blind hole 41 can also center the inner sleeve 4 and the central axis of the adjusting bolt 2, ensuring the coaxiality of the overall structure, reducing the additional torque caused by eccentricity, and further improving the stability of the fixture in clamping the workpiece 9.

[0041] In some embodiments, such as Figures 1-3 As shown, the rod of the adjusting bolt 2 is threaded with a locking nut 8. After the fixture adjusts the pressure on the workpiece 9, the locking nut 8 can be tightened onto the upper end face of the fixing sleeve 6 to lock the position of the adjusting bolt 2. It should be noted that the locking nut 8 provides a reliable mechanical anti-loosening guarantee for pressure adjustment: after the adjusting bolt 2 completes the pressure preset, by tightening the locking nut 8 onto the upper end face of the fixing sleeve 6, the friction between the threads can be used to form an axial preload, which effectively counteracts the loosening of the adjusting bolt 2 caused by vibration, impact and other factors during the working process, ensuring that the compression of the elastic element 5 remains stable, thereby maintaining a constant clamping pressure on the workpiece 9. In addition, this structure does not require an additional complex locking mechanism. It can achieve quick locking and unlocking simply by the threaded engagement of the nut and the bolt, which simplifies the operation process and allows for flexible loosening when the pressure needs to be readjusted, taking into account both pressure stability and adjustment flexibility.

[0042] In some embodiments, such as Figures 1-3As shown, the clamping member 3 is installed inside the mounting part 14. The clamping member 3 includes a bushing 31. A mounting through hole 35 for mounting the workpiece 9 is provided at the central axis of the bushing 31. Two strip-shaped elastic grooves 32 are provided circumferentially on the outer peripheral wall of the lower end of the bushing 31. The elastic grooves 32 are used to allow the lower end of the bushing 31 to undergo elastic deformation when the workpiece 9 is inserted into the mounting through hole 35. It should be noted that the design of the elastic grooves 32 provides a controllable elastic deformation margin for the lower end of the bushing 31: when the workpiece 9 is inserted, the lower end of the bushing 31 can... The radial adaptive adjustment achieved by the opening of the elastic groove 32 can easily accommodate workpieces 9 within different tolerance ranges, and can generate uniform radial clamping force during deformation reset, improving the stability of workpiece 9 installation; at the same time, the elastic deformation process can buffer the impact force when workpiece 9 is inserted, avoiding damage to workpiece 9 or bushing 31 caused by hard contact, which is especially suitable for clamping precision or brittle workpieces 9; in addition, the two circumferentially spaced strip grooves make the deformation stress distribution more uniform, reduce local fatigue wear, and extend the service life of bushing 31.

[0043] It should be noted that the bushing 31 is made of PEEK, which has wear resistance, low coefficient of friction and good toughness. The workpiece 9 is installed inside the bushing 31, which can protect the workpiece 9 from being pinched or scratched.

[0044] In some embodiments, such as Figure 9 As shown, the clamping component 3 includes an O-ring 33. An annular groove 36 is formed on the outer peripheral wall of the lower section of the bushing 31. The O-ring 33 is housed in the annular groove 36. It should be noted that the matching design of the O-ring 33 and the annular groove 36 can significantly improve the clamping performance: the elasticity of the O-ring 33 itself can form a continuous radial preload on the lower section of the bushing 31. When the lower end of the bushing 31 undergoes elastic deformation due to the insertion of the workpiece 9, the O-ring 33 will generate a reverse elastic force with the deformation, further enhancing the clamping force of the bushing 31 on the workpiece 9. Moreover, the O-rings 33 evenly distributed around the annular groove 36 can ensure a more balanced radial force and avoid excessive local stress on the workpiece 9. At the same time, the O-ring 33 can buffer the vibration transmission between the workpiece 9 and the bushing 31, reduce the surface damage of the workpiece 9 caused by hard friction, and play a protective role.

[0045] In some embodiments, such as Figures 2-3As shown, the bushing 31 is installed in the mounting part 14 via the bearing 34. It should be noted that the bearing 34 can significantly optimize the relative motion performance between the bushing 31 and the mounting part 14: On the one hand, the bearing 34 can convert the sliding friction between the bushing 31 and the mounting part 14 into rolling friction, greatly reducing the friction coefficient during relative motion, reducing component wear, and extending the overall service life of the fixture; on the other hand, the bearing 34 can form a precise radial positioning for the bushing 31, ensuring the coaxiality of the bushing 31 and the fixed seat 1, preventing the bushing 31 from radially shifting or shaking during operation, and improving the coaxiality accuracy of the workpiece 9 clamping. In addition, when the workpiece 9 needs to rotate around its own axis, the bearing 34 can enable the bushing 31 to drive the workpiece 9 to achieve low-resistance and high-stability rotation, avoiding rotation jamming caused by excessive frictional resistance, and further expanding the applicable scenarios of the fixture.

[0046] The same or similar parts between the various embodiments in this specification can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments.

[0047] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A pressure-adjustable fixture, comprising a fixed base (1), characterized in that: The fixed base (1) is provided with a vertical slide rail (11) that runs vertically through its central axis. An adjusting bolt (2) that can move vertically is installed at the upper end of the vertical slide rail (11). A clamping member (3) for clamping a workpiece (9) is installed at the lower end of the vertical slide rail (11). The workpiece (9) is inserted into the central through hole of the clamping member (3). An inner sleeve (4) that can slide vertically is provided in the vertical slide rail (11). The inner sleeve (4) is connected to the adjusting bolt (2) through an elastic member (5). When the workpiece (9) is installed in the clamping member (3), the upper end of the workpiece (9) abuts against the lower end face of the inner sleeve (4). By adjusting the position of the adjusting bolt (2) on the vertical slide rail (11), the compression amount of the elastic member (5) is adjusted, thereby changing the pressure applied by the inner sleeve (4) to the workpiece (9).

2. The pressure-adjustable fixture according to claim 1, characterized in that: The vertical slide (11) consists of an adjustment part (12), a sliding part (13), and a mounting part (14) from top to bottom. The apertures of the mounting part (14) and the adjustment part (12) are both larger than the aperture of the sliding part (13).

3. The pressure-adjustable fixture according to claim 2, characterized in that: The adjusting part (12) is connected to a fixed sleeve (6) by an internal thread. The fixed sleeve (6) has a sliding through hole (61) along its central axis. The rod of the adjusting bolt (2) is threaded to the upper end of the sliding through hole (61). The inner sleeve (4) is slidably installed in the sliding through hole (61).

4. The pressure-adjustable fixture according to claim 3, characterized in that: The inner sleeve (4) has a blind hole (41) at its central axis. The opening of the blind hole (41) is located on the upper end face of the inner sleeve (4). The elastic element (5) is housed in the blind hole (41). A pressure pin (7) is provided between the inner sleeve (4) and the adjusting bolt (2). The rod of the pressure pin (7) is inserted into the blind hole (41). The lower end face of the rod of the pressure pin (7) abuts against the upper end face of the elastic element (5). The upper end face of the pressure pin (7) abuts against the lower end face of the adjusting bolt (2).

5. The pressure-adjustable fixture according to claim 3, characterized in that: The adjusting bolt (2) has a threaded connection to a locking nut (8). After the fixture is adjusted to apply pressure to the workpiece (9), the locking nut (8) can be tightened onto the upper end face of the fixing sleeve (6) to lock the position of the adjusting bolt (2).

6. The pressure-adjustable fixture according to claim 2, characterized in that: The clamping member (3) is installed in the mounting part (14). The clamping member (3) includes a bushing (31). The bushing (31) has a mounting through hole (35) for mounting the workpiece (9) at its central axis. The bushing (31) has a plurality of strip-shaped elastic grooves (32) spaced circumferentially on the outer peripheral wall of its lower end. The elastic grooves (32) allow the lower end of the bushing (31) to undergo elastic deformation when the workpiece (9) is inserted into the mounting through hole (35).

7. A pressure-adjustable fixture according to claim 6, characterized in that: The clamping member (3) includes an O-ring (33), and an annular groove (36) is provided on the outer peripheral wall of the lower section of the bushing (31), and the O-ring (33) is accommodated in the annular groove (36).

8. A pressure-adjustable fixture according to claim 6, characterized in that: The bushing (31) is mounted in the mounting part (14) via a bearing (34).

Images