Composite mandrel assembly

Abstract

The utility model provides a composite mandrel assembly, including a shaft body, a plurality of connecting shafts with different inner diameters, and two clamping assemblies; a positioning plate is provided in the middle of the shaft body, and the plate surface of the positioning plate is perpendicular to the length direction of the shaft body; a plurality of connecting shafts with different inner diameters are sleeved on the outer periphery of the shaft body, and are respectively arranged on both sides of the positioning plate, and the outer diameters of the plurality of connecting shafts on the same side of the positioning plate gradually increase in the direction toward the positioning plate; two clamping assemblies are respectively connected to the two ends of the shaft body, and respectively cooperate with the positioning plate to clamp a plurality of workpieces on the corresponding sides. The composite mandrel assembly provided by the utility model can cooperate with various types of workpieces to perform the outer circle grinding process, thereby reducing the manufacturing cost, and there is no need to separately manufacture different types of mandrels, thereby reducing the manufacturing difficulty; the mandrel assembly is easy to store and does not need to be marked.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical manufacturing, and in particular relates to a composite mandrel assembly. Background Art

[0002] In the process of manufacturing coal mining machinery, it is often the case that a variety of sleeve parts need to be processed with the mandrel for external cylindrical grinding. The sleeve parts are mounted on the mandrel to remain relatively fixed to avoid rotation of the parts when processing the external cylindrical surface of the sleeve parts, which increases the difficulty of external cylindrical grinding.

[0003] The existing method of processing sleeve parts is to design corresponding mandrels according to different parts, and the parts are sleeved on the corresponding mandrels to remain relatively fixed to complete the external grinding process. Due to the large variety of sleeve parts, the sizes and shapes of the mandrels that need to be produced are also numerous, resulting in increased manufacturing costs. Multiple types of mandrels need to be stored, which increases the workload of management and storage. The placement and retrieval requires additional marking, and the use process is cumbersome. Utility Model Content

[0004] The embodiment of the utility model provides a composite mandrel assembly, aiming to solve the technical problems of high manufacturing cost of the mandrel and complicated storage and retrieval process in the prior art.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a composite mandrel assembly, including:

[0006] The shaft body has a positioning plate in the middle, and the plate surface of the positioning plate is perpendicular to the length direction of the shaft body;

[0007] A plurality of connecting shafts with different inner diameters are sleeved on the outer circumference of the shaft body and are respectively arranged on both sides of the positioning plate, and the outer diameters of the plurality of connecting shafts located on the same side of the positioning plate gradually increase in a direction toward the positioning plate; and

[0008] Two clamping assemblies are respectively connected to the two ends of the shaft body, and respectively cooperate with the positioning plate to clamp a plurality of workpieces on the corresponding sides.

[0009] In a possible implementation manner, an outer diameter of the positioning plate is greater than an outer diameter of the connecting shaft.

[0010] In a possible implementation, the pressing assembly includes:

[0011] A pressure ring, sleeved on the shaft body and abutting against an end face of the adjacent connecting shaft; and

[0012] A fastener is sleeved on the shaft body, and the fastener abuts against the shaft end surface of the pressure ring away from the connecting shaft to limit the displacement of the pressure ring along the axial direction of the shaft body.

[0013] In a possible implementation, the clamping assembly also includes a threaded sleeve, which is sleeved on the end of the shaft body, and the outer circumference of the threaded sleeve is provided with an external thread, and the inner ring of the fastener is provided with an internal thread corresponding to the external thread, and the internal thread and the external thread cooperate to keep the fastener and the shaft body relatively fixed.

[0014] In a possible implementation, the shaft body is a polygonal column, the interior of the connecting shaft forms a polygonal fitting hole corresponding to the shaft body, and the polygonal column is plug-fitted with the fitting hole to limit the rotation of the connecting shaft in its own circumferential direction.

[0015] In a possible implementation, the outer diameter of the pressure ring is greater than the outer diameter of the adjacent connecting shaft, so as to limit the displacement of the workpiece in the axial direction of the shaft body.

[0016] In a possible implementation manner, connection holes are respectively formed at both ends of the shaft.

[0017] In a possible implementation, a spacer sleeve is provided on the outer periphery of the connecting shaft, and the spacer sleeve abuts against the workpiece to form a gap between the workpiece and the adjacent axial surface of the connecting shaft.

[0018] In a possible implementation manner, the plurality of connecting shafts are symmetrically distributed on the shaft body with the positioning plate as the center.

[0019] In a possible implementation, mounting blocks are respectively provided at both ends of the shaft body, and the mounting blocks are used to be connected to a clamping tool.

[0020] Compared with the prior art, the composite mandrel assembly provided by the utility model is provided with a shaft body, on which connecting shafts corresponding to various types of sleeve-type workpieces are arranged one by one, the workpieces are sleeved on the corresponding connecting shafts, and the multiple workpieces are fixed on the shaft body through the clamping assemblies at both ends. The device has a wide range of applications, and one mandrel assembly can cooperate with various types of workpieces to perform external circle grinding processes, thereby reducing the production cost, and there is no need to separately produce different types of mandrels, thereby reducing the manufacturing difficulty; the mandrel assembly is easy to store, does not need to be marked, and does not need to be sorted for taking and placing, and is highly convenient to manage; the sizes of the multiple mandrels gradually decrease from the middle of the shaft body to both sides, thereby ensuring that sleeve-type workpieces of each size can be directly sleeved on the corresponding connecting shafts, thereby improving the convenience of use and the installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 This is a schematic diagram of the main structure of the composite mandrel assembly provided in the first embodiment of the utility model, wherein the pressure ring is in a cross-sectional state;

[0023] Figure 2 for Figure 1 Schematic diagram of the assembly of the connecting shaft and the workpiece used in the embodiment, wherein the pressure ring and the workpiece are in a cross-sectional state;

[0024] Figure 3 for Figure 1 Schematic diagram of the assembly of the connecting shaft and the spacer sleeve used in;

[0025] Figure 4 A structural side view of the connecting shaft used in the second embodiment of the present utility model;

[0026] Figure 5 This is a schematic diagram of the main structure of the composite mandrel assembly used in the third embodiment of the present utility model, wherein the pressure ring is in a cross-sectional state;

[0027] Figure 6 This is a schematic structural diagram of the composite mandrel assembly provided in Embodiment 4 of the present utility model, wherein the pressure ring is in a cross-sectional state.

[0028] Description of reference numerals:

[0029] 1. Axis body; 11. Positioning plate;

[0030] 2. Connecting shaft; 21. Set hole;

[0031] 3. Clamping assembly; 31. Pressing ring; 32. Fastener; 33. Threaded sleeve;

[0032] 4. Spacer;

[0033] 5. Install the block;

[0034] 6. Workpiece. DETAILED DESCRIPTION

[0035] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0036] It should be noted that the terms "length", "width", "height", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0037] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "install", "connect", "connect", "fix", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In addition, the meaning of "multiple" and "several" is two or more, unless otherwise clearly and specifically defined.

[0039] Please also read Figures 1 to 6 , the composite mandrel assembly provided by the utility model is now described. The composite mandrel assembly includes a shaft body 1, a plurality of connecting shafts 2 with different inner diameters, and two clamping assemblies 3. A positioning disk 11 is provided in the middle of the shaft body 1, and the plate surface of the positioning disk 11 is perpendicular to the length direction of the shaft body 1; a plurality of connecting shafts 2 with different inner diameters are sleeved on the outer periphery of the shaft body 1, and are respectively arranged on both sides of the positioning disk 11, and the outer diameters of the plurality of connecting shafts 5 located on the same side of the positioning disk 11 gradually increase in the direction toward the positioning disk 11; the two clamping assemblies 3 are respectively connected to the two ends of the shaft body 1, and respectively cooperate with the positioning disk 11 to clamp the plurality of workpieces 6 on the corresponding sides.

[0040] It should be noted that the axial surfaces of two adjacent connecting shafts 2 abut against each other.

[0041] It should be noted that the outer circumference of the connecting shaft 2 is conformably fitted to the inner diameter of the corresponding sleeve-type workpiece, and the Baoheng connecting shaft 2 can be connected to the corresponding workpiece 6 .

[0042] As another embodiment of the connection between the shaft body 1 and the connecting shaft, the shaft body 1 and the multiple connecting shafts 2 are integrally molded and cast. The shaft body 1 and the multiple connecting shafts 2 are integrally cast and molded, which increases the structural stability of the composite mandrel assembly, does not require the shaft body 1 and the connecting shaft 2 to be assembled, omits the assembly steps, and improves the connection efficiency between the composite mandrel assembly and the workpiece 6. The shaft body 1 and the multiple connecting shafts 2 are integrally cast and molded, which is convenient for storage and management, and does not require disassembly and classification for storage.

[0043] During specific implementation, four connecting shafts 2 are sleeved on the shaft body 1, and the four connecting shafts 2 are defined as shaft one, shaft two, shaft three and shaft four respectively. The diameters of the four connecting shafts 2 gradually increase. During installation, shaft three and shaft four are respectively sleeved on both sides of the positioning plate 11, shaft two is sleeved on the side of shaft four away from the positioning plate 11, and shaft one is sleeved on the side of shaft three away from the positioning plate 11, so as to facilitate the sleeve of the workpiece.

[0044] In the present embodiment, since one composite mandrel assembly can cooperate with different types of sleeve-type workpieces 6, it is sufficient to manufacture a plurality of identical composite mandrel assemblies. The structural dimensions of the plurality of composite mandrel assemblies are the same, and there is no need to classify and label them during management and storage, thereby reducing the difficulty of management and thus reducing the management cost.

[0045] When used, only one type of workpiece 6 can be set at a time for processing. Figure 2 When processing the workpiece 6 corresponding to the second axis, the outer periphery of the other connected axis 2 is not connected to the corresponding workpiece 6, and only a single workpiece 6 is ground at a time.

[0046] Compared with the prior art, the composite mandrel assembly provided in the present embodiment is provided with a shaft body 1, on which connecting shafts 2 corresponding to various types of sleeve-type workpieces 6 are provided, and the workpieces 6 are sleeved on the corresponding connecting shafts 2, and the workpieces 6 are fixed on the shaft body 1 by the clamping components 3 at both ends. The device has a wide range of applications, and one mandrel assembly can cooperate with various types of workpieces 6 to perform the external circle grinding process, thereby reducing the manufacturing cost, eliminating the need to separately manufacture different types of mandrels, and reducing the manufacturing difficulty; the mandrel assembly is easy to store, does not require marking, and does not require sorting for taking and placing, and is highly convenient to manage; the sizes of the multiple mandrels gradually decrease from the middle of the shaft body 1 to both sides, ensuring that sleeve-type workpieces 6 of each size can be directly inserted into the corresponding connecting shaft 2, thereby improving the convenience of use and the installation efficiency.

[0047] In some embodiments, the outer diameter of the positioning plate 11 is larger than the outer diameter of the connecting shaft 2 to ensure that after the workpiece 6 is sleeved on the connecting shaft 2, the positioning plate 11 can limit the workpiece 6 in the axial direction to prevent the workpiece 6 from moving.

[0048] In some embodiments, see Figure 1 and Figure 2The clamping assembly 3 includes a pressing ring 31 and a fastener 32. The pressing ring 31 is sleeved on the shaft body 1 and abuts against the end face of the adjacent connecting shaft 2; the fastener 32 is sleeved on the shaft body 1, and the fastener 32 abuts against the shaft end face of the pressing ring 31 away from the connecting shaft 2 to limit the axial displacement of the pressing ring 31 along the shaft body 1. The pressing ring 31 can limit the connecting shaft 2 and the workpiece 6 in the axial direction of the shaft body 1, and the fastener 32 pushes the pressing ring 31 to move toward the positioning plate 11. The pressing ring 31 and the positioning plate 11 clamp the connecting shaft 2 to limit the axial position of the connecting shaft 2, thereby preventing the connecting shaft 2 from being displaced during use and ensuring the normal progress of the outer circle grinding process.

[0049] In a specific implementation, the pressure ring 21 is a pressure cover, which can perform limiting abutment from the side of the connecting shaft 2 .

[0050] Optionally, the fastener 32 is a fastening nut, a thread is set on the shaft body 1, the fastening nut and the shaft body 1 are screwed together, the screw connection has high connection strength, and the state is not easy to change, the pressure ring 21 and the connecting shaft 21 are pressed tightly to ensure the working stability of the external circle grinding process.

[0051] In some embodiments, see Figure 1 and Figure 2 The clamping assembly 3 further includes a threaded sleeve 33, which is sleeved on the end of the shaft body 1. The outer periphery of the threaded sleeve 33 is provided with an external thread, and the inner ring of the fastener 32 is provided with an internal thread corresponding to the external thread, and the internal thread and the external thread are threadedly matched to keep the fastener 32 and the shaft body 1 relatively fixed. The threaded sleeve 33 is fixed on the shaft body 1, and the fastener 32 and the threaded sleeve 33 are threadedly matched to improve the connection strength between the fastener 32 and the threaded sleeve 33. The threaded sleeve 33 is fixed to the shaft body 1, thereby increasing the connection strength between the fastener 32 and the threaded sleeve 33. Through the screw connection between the fastener 32 and the threaded sleeve 33, the convenience of disassembly of the fastener 32 is improved, the fastening assembly 3 is quickly installed, and the preparation time for the external grinding process is shortened.

[0052] In some embodiments, see Figure 4 The shaft body 1 is a polygonal column, and a polygonal set hole 21 is formed inside the connecting shaft 2 corresponding to the shaft body 1. The polygonal column and the set hole 21 are plugged and matched to limit the rotation of the connecting shaft 2 in its own circumferential direction. The arrangement of the polygonal column and the set hole 21 enables the connecting shaft 2 to remain relatively fixed with the shaft body 1 in the circumferential direction of the shaft body 1, and maintains the working stability of the connecting shaft 2 during use.

[0053] In specific implementation, the set hole 21 and the outer periphery of the shaft body 1 are fitted in a shape, when the shaft body 1 is a hexagonal prism, the set hole 21 is a hexagonal hole, when the shaft body 1 is a triangular prism, the set hole 21 is a triangular hole. The specific setting can be manufactured according to production needs.

[0054] In some embodiments, see Figure 1The outer diameter of the pressure ring 31 is larger than the outer diameter of the adjacent connecting shaft 2 to limit the displacement of the workpiece 6 in the axial direction of the shaft body 1. In order to limit the workpiece 6 in the axial direction of the connecting shaft 2, the outer diameter of the pressure ring 31 is larger than the outer diameter of the connecting shaft 2, which can effectively abut the end faces of the connecting shaft 2 and the workpiece 6, ensuring that the workpiece 6 will not move in its own axial direction after being sleeved on the corresponding connecting shaft 2.

[0055] In some embodiments, connection holes are formed at both ends of the shaft body 1. The setting of the connection holes enables the shaft body 1 to be connected to other devices, reducing the difficulty of connection.

[0056] During specific implementation, a plug-in protrusion is installed on a fixing device (such as a mounting frame), and the plug-in protrusion and the connecting hole are plugged and matched, so that the composite mandrel assembly can be fixed on the fixing device, which is convenient for external circle grinding.

[0057] In some embodiments, see Figure 3 The outer periphery of the connecting shaft 2 is sleeved with a spacer sleeve 4, which abuts against the workpiece 6 to form a gap between the workpiece 6 and the axial surface of the adjacent connecting shaft 2. The spacer sleeve 4 can be sleeved on the outer periphery of the connecting shaft 2 and abut against the end surface of the workpiece 6 to separate the workpiece 6 and the adjacent connecting shaft 2, so as to avoid the friction between the grinding wheel and the connecting shaft 2 during the grinding of the outer circle, thereby causing damage to the connecting shaft 2.

[0058] Taking shaft four as an example, when the workpiece 6 is sleeved on shaft four, the grinding wheel grinds the outer circle of the workpiece 6. In order to avoid the grinding wheel from hitting shaft two when moving, a spacer sleeve 4 is arranged on the outer periphery of the end of shaft four close to shaft two. The spacer sleeve 4 separates the workpiece 6 and shaft two, preventing the grinding wheel from contacting shaft two during processing, thereby extending the service life of the grinding wheel and the connecting shaft 2.

[0059] In a specific implementation, the spacer 4 is a thin spacer, and the axial width of the thin spacer is 5 to 8 mm. The spacer 4 can separate the clearance distance of the grinding wheel to prevent the grinding wheel from hitting the connecting shaft 2.

[0060] In some embodiments, see Figure 6 , multiple connecting shafts 2 are symmetrically distributed on the shaft body 1 with the positioning plate 11 as the center. The multiple connecting shafts 2 are symmetrically distributed, so that the composite mandrel assembly can be installed with two workpieces 6 of the same type at one time. When performing the outer circle grinding operation, after the outer circle grinding operation is performed on one of the workpieces 6, the composite mandrel assembly can be turned around, and the grinding wheel can then grind the outer circle of the unprocessed workpiece 6. The symmetrically distributed connecting shafts 2 provided in this embodiment can process two workpieces 6 of the same type at one time, thereby improving the efficiency of the outer circle grinding process.

[0061] In some embodiments, see Figure 5The two ends of the shaft body 1 are respectively provided with mounting blocks 5, and the mounting blocks 5 are used to connect with the clamping fixture. The mounting blocks 5 can be connected with other equipment, reduce the connection difficulty, provide a connection position, increase the adaptability of the composite mandrel assembly, and fix the shaft body 1 at a specified position through the mounting blocks 5, thereby improving the working stability.

[0062] Specifically, a positioning hole can be installed on the mounting block 5, and a pin can be passed through the positioning hole to fix the shaft body 1; an external thread can also be set on the mounting block 5, and a device with an internal thread can be matched with the thread of the mounting block 5 to connect the mounting block 5 and other devices to fix the composite core shaft assembly.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A composite mandrel assembly, characterized in that: include: The shaft body has a positioning plate in the middle, and the plate surface of the positioning plate is perpendicular to the length direction of the shaft body; A plurality of connecting shafts with different inner diameters are sleeved on the outer circumference of the shaft body and are respectively arranged on both sides of the positioning plate, and the outer diameters of the plurality of connecting shafts located on the same side of the positioning plate gradually increase in a direction toward the positioning plate; and Two clamping assemblies are respectively connected to the two ends of the shaft body, and respectively cooperate with the positioning plate to clamp a plurality of workpieces on the corresponding sides.

2. The composite mandrel assembly according to claim 1, characterized in that: The outer diameter of the positioning plate is greater than the outer diameter of the connecting shaft.

3. The composite mandrel assembly according to claim 1, characterized in that: The clamping assembly comprises: A pressure ring, sleeved on the shaft body and abutting against an end face of the adjacent connecting shaft; and A fastener is sleeved on the shaft body, and the fastener abuts against the shaft end surface of the pressure ring away from the connecting shaft to limit the displacement of the pressure ring along the axial direction of the shaft body.

4. The composite mandrel assembly according to claim 3, characterized in that: The clamping assembly also includes a threaded sleeve, which is sleeved on the end of the shaft body. The outer circumference of the threaded sleeve is provided with an external thread, and the inner ring of the fastener is provided with an internal thread corresponding to the external thread. The internal thread and the external thread cooperate with each other to keep the fastener and the shaft body relatively fixed.

5. The composite mandrel assembly according to claim 1, characterized in that: The shaft body is a polygonal column, and a polygonal fitting hole is formed inside the connecting shaft corresponding to the shaft body. The polygonal column is plug-fitted with the fitting hole to limit the rotation of the connecting shaft in its own circumferential direction.

6. The composite mandrel assembly according to claim 3, characterized in that: The outer diameter of the pressure ring is greater than the outer diameter of the adjacent connecting shaft so as to limit the displacement of the workpiece in the axial direction of the shaft body.

7. The composite mandrel assembly according to claim 1, characterized in that: Connecting holes are formed at both ends of the shaft body.

8. The composite mandrel assembly according to claim 1, characterized in that: The outer periphery of the connecting shaft is sleeved with a spacer sleeve, and the spacer sleeve abuts against the workpiece so that a gap is formed between the workpiece and the axial surface of the adjacent connecting shaft.

9. The composite mandrel assembly according to claim 1, characterized in that: The plurality of connecting shafts are symmetrically distributed on the shaft body with the positioning plate as the center.

10. The composite mandrel assembly according to claim 1, characterized in that: Both ends of the shaft body are respectively provided with mounting blocks, and the mounting blocks are used to be connected with the clamping tooling.

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