Grinding machine for crankshaft connecting rod of sewing machine

Abstract

The utility model provides a sewing machine crankshaft connecting rod grinding machine which comprises a working table, a power motor is fixedly connected to the working table, a power shaft of the power motor is connected with an installation rod, an installation hole is formed in the installation rod, and when a sewing machine crankshaft penetrates into the installation hole, a crankshaft connecting rod and the installation rod are coaxially arranged. A mounting rod is arranged on the workbench, a fixing bolt used for abutting against a crankshaft of the sewing machine is in threaded connection with the mounting rod, a positioning table is fixedly connected to the workbench, a rotary telescopic assembly is arranged on the positioning table and connected with an auxiliary rod, and the auxiliary rod is connected with a grinding rod through an elastic assembly. The grinding rod is provided with a grinding groove used for abutting against the crankshaft connecting rod, and the purpose of improving the production efficiency is achieved.

Description

Technical Field

[0001] The utility model relates to a processing device for a sewing machine crankshaft, and particularly to a grinding machine for a sewing machine crankshaft connecting rod. Background Art

[0002] At present, a Chinese patent with the authorization announcement number CN206706347U discloses a main drive crankshaft of an industrial sewing machine, which includes a crankshaft main body. Along the axial direction of the crankshaft main body, a lower looper mechanism connecting ball, a needle bar mechanism connecting ball, an upper knife mechanism connecting ball, and a lower looper mechanism connecting ball are sequentially arranged. The crankshaft main body is connected to four major mechanisms of the lower looper mechanism, the needle bar mechanism, the upper knife mechanism, and the lower looper mechanism of the driving machine through four balls respectively.

[0003] By utilizing the universal joint characteristics of the ball, when the main drive crankshaft is connected to the driven shafts parallel and perpendicular to it during the whole machine assembly process, the parallelism and perpendicularity problems of the parts or the body support shafts can be basically ignored, thereby making the processing of the body and the corresponding parts simpler, with lower processing costs. At the same time, the installation is convenient, cost is saved, and the quality of the whole machine is higher and the performance is more stable.

[0004] Due to process requirements, it is necessary to grind the lower looper mechanism connecting ball to improve the surface finish. At present, workers use a manual method, applying grinding paste on a wiping cloth and then using the wiping cloth to grind the lower looper mechanism connecting ball, which is time-consuming and laborious, and the production efficiency is low. Content of the Utility Model

[0005] In view of this, the purpose of the utility model is to provide a grinding machine for a sewing machine crankshaft connecting rod to achieve the purpose of improving production efficiency.

[0006] To solve the above technical problems, the technical solution of the utility model is: a grinding machine for a sewing machine crankshaft connecting rod, which includes a workbench. A power motor is fixedly connected to the workbench. A power shaft of the power motor is connected to an installation rod. An installation hole is formed in the installation rod. When a sewing machine crankshaft penetrates into the installation hole, the crankshaft connecting rod is coaxially arranged with the installation rod. A fixing bolt for abutting against the sewing machine crankshaft is threadedly connected to the installation rod. A positioning table is fixedly connected to the workbench. A rotary telescopic assembly is arranged on the positioning table. The rotary telescopic assembly is connected to an auxiliary rod. The auxiliary rod is connected to a grinding rod through an elastic force assembly. A grinding groove for abutting against the crankshaft connecting rod is formed in the grinding rod.

[0007] To implement the above technical solution, the sewing machine crankshaft is inserted into the mounting hole to make the crankshaft connecting rod coaxial with the mounting rod. When the mounting rod is rotated by the power motor, the crankshaft connecting rod can rotate stably. The rotating and telescoping assembly drives the auxiliary rod to move, so that the grinding groove on the grinding rod abuts against the crankshaft connecting rod. Through the elastic force of the elastic component, the grinding rod applies pressure to the crankshaft connecting rod. The rotating and telescoping assembly drives the auxiliary rod to rotate, and the grinding paste is coated on the crankshaft connecting rod, which can achieve the grinding effect on the crankshaft connecting rod, eliminating the manual grinding process by workers, saving time and effort, and greatly improving production efficiency.

[0008] As a preferred solution of the present utility model, the rotating and telescoping assembly includes an auxiliary motor and a power cylinder. The rotating shaft of the auxiliary motor is connected to the auxiliary rod through a linkage structure, and the telescoping shaft of the power cylinder is rotatably connected to the auxiliary rod.

[0009] To implement the above technical solution, when the auxiliary motor is started, the rotating shaft drives the auxiliary rod to rotate through the linkage structure. When the power cylinder is started, the telescoping shaft moves along its own length direction to push the auxiliary rod to move, so that the grinding rod moves towards or away from the crankshaft connecting rod.

[0010] As a preferred solution of the present utility model, the linkage structure includes a first gear and a second gear. The first gear is fixed on the rotating shaft and is coaxially arranged with the rotating shaft. The second gear is fixed on the auxiliary rod and is coaxially arranged with the auxiliary rod. The first gear meshes with the second gear, and the axes of the first gear, the second gear, and the telescoping shaft are all parallel.

[0011] To implement the above technical solution, when the auxiliary motor is started, the rotating shaft drives the first gear to rotate. The first gear drives the second gear to rotate, and the second gear drives the auxiliary rod to rotate. During the process of the auxiliary rod moving along its own length direction, the first gear and the second gear can always remain in a meshing state.

[0012] As a preferred solution of the present utility model, the elastic component includes a guiding rod, a guiding groove, and an elastic member. The guiding rod is fixed on the outer wall of the grinding rod, the guiding groove is opened on the inner wall of the auxiliary rod, the guiding rod is slidably connected in the guiding groove, and both ends of the elastic member are respectively connected to the inner wall of the auxiliary rod and the grinding rod.

[0013] To implement the above technical solution, the inner wall of the guiding groove abuts against the guiding rod, so that the grinding rod can rotate synchronously with the auxiliary rod. Through the elastic force of the elastic member, the grinding rod can apply a greater pressure to the crankshaft connecting rod to improve the grinding effect.

[0014] As a preferred solution of the present utility model, a lighting lamp is connected to the fixing table, and the lighting lamp is close to the crankshaft connecting rod.

[0015] Implementing the above technical solution is convenient for workers to check the grinding condition of the crankshaft connecting rod.

[0016] As a preferred solution of the present utility model, the auxiliary rod includes a main rod and a sub-rod. One end of the main rod is fixedly connected to the second gear. A placement hole is formed at the other end of the main rod. One end of the sub-rod is slidably connected in the placement hole. The other end of the sub-rod is connected to the grinding rod through an elastic component. The main rod is connected to the sub-rod through a positioning structure.

[0017] Implementing the above technical solution, sliding the sub-rod into the placement hole and fixing the sub-rod through the positioning structure, thereby adjusting the position of the sub-rod to make the position of the grinding rod adapt to crankshaft connecting rods of different sizes, improving the practicability.

[0018] As a preferred solution of the present utility model, the positioning structure includes a locking sleeve, an elastic plate, a pressing ring, and a guiding inclined surface. A plurality of the elastic plates are fixed to the end of the main rod. The pressing ring is fixed to the inner wall of the locking sleeve. The guiding inclined surface is formed on the pressing ring and is used to abut against the end of the elastic plate. The locking sleeve is threadedly connected to the outer wall of the main rod. The elastic plate is used to tightly abut against the outer wall of the sub-rod.

[0019] Implementing the above technical solution, inserting the sub-rod into the placement hole, rotating the locking sleeve, the locking sleeve moves towards the main rod, the guiding inclined surface abuts against the elastic plate, causing the elastic plate to bend and tightly abut against the outer wall of the sub-rod. The generated frictional force realizes the positioning of the sub-rod, and the self-locking property of the thread realizes the positioning of the locking sleeve.

[0020] As a preferred solution of the present utility model, a plurality of anti-slip grooves are formed on the outer wall of the locking sleeve.

[0021] Implementing the above technical solution is convenient for rotating the locking sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the external structure in the embodiment;

[0023] Figure 2 It is a schematic diagram showing the linkage structure;

[0024] Figure 3 It is a schematic cross-sectional view showing the elastic component;

[0025] Figure 4 It is a schematic cross-sectional view showing the positioning structure.

[0026] Reference numerals: 1, workbench; 11, power motor; 12, mounting rod; 13, mounting hole; 14, fixing bolt; 2, positioning table; 3, auxiliary rod; 31, main rod; 32, sub-rod; 4, positioning structure; 41, locking sleeve; 42, elastic plate; 43, pressing ring; 44, guiding inclined surface; 5, anti-slip groove; 61, auxiliary motor; 611, rotating shaft; 62, power cylinder; 621, telescopic shaft; 63, bearing; 7, linkage structure; 71, first gear; 72, second gear; 8, elastic component; 81, guiding rod; 82, guiding groove; 83, elastic member; 91, grinding rod; 92, grinding groove; 93, lighting lamp. Detailed implementation manners

[0027] The following further details the specific implementation manners of the present utility model in conjunction with the attached drawings, so that the technical solutions of the present utility model are easier to understand and master.

[0028] A grinding machine for the crankshaft connecting rod of a sewing machine includes a horizontally placed workbench 1. A power motor 11 is fixedly connected to the workbench 1. The power shaft of the power motor 11 is connected to a mounting rod 12 through a coupling. The mounting rod 12 is horizontally placed and arranged along the transverse direction of the workbench 1. Mounting holes 13 are formed in the mounting rod 12. When the crankshaft of the sewing machine penetrates into the mounting holes 13, the crankshaft connecting rod is coaxially arranged with the mounting rod 12. A fixing bolt 14 for abutting against the crankshaft of the sewing machine is threadedly connected to the mounting rod 12. The crankshaft of the sewing machine is penetrated into the mounting holes 13, and the crankshaft of the sewing machine is fixed by the fixing bolt 14. The power motor 11 is connected and started. The mounting rod 12 rotates, and the crankshaft connecting rod on the crankshaft of the sewing machine can rotate along its own axis.

[0029] A positioning table 2 is fixedly connected to the workbench 1. A rotating and telescopic assembly is arranged on the positioning table 2. The rotating and telescopic assembly is connected to an auxiliary rod 3. The auxiliary rod 3 includes a main rod 31 and a sub-rod 32. A placement hole is formed at one end of the main rod 31. The placement hole is coaxially arranged with the main rod 31. One end of the sub-rod 32 is slidably connected in the placement hole. The main rod 31 is connected to the sub-rod 32 through a positioning structure 4 to adjust the position of the sub-rod 32.

[0030] The positioning structure 4 includes a locking sleeve 41, an elastic plate 42, a pressing ring 43, and a guiding inclined surface 44. A plurality of elastic plates 42 are fixed to the end of the main rod 31, and the plurality of elastic plates 42 are evenly distributed along the axis of the main rod 31. The pressing ring 43 is fixed to the inner wall of the locking sleeve 41. The pressing ring 43 is coaxially arranged with the locking sleeve 41. The guiding inclined surface 44 is formed on the pressing ring 43 and is used for abutting against the end of the elastic plate 42. The locking sleeve 41 is threadedly connected to the outer wall of the main rod 31. The elastic plate 42 is used for abutting against the outer wall of the sub-rod 32.

[0031] After inserting the secondary rod 32 into the placement hole, rotate the locking sleeve 41 to move the locking sleeve 41 towards the main rod 31. When the end of the elastic plate 42 abuts against the guiding inclined surface 44, it bends, causing the elastic plate 42 to tightly abut against the outer wall of the secondary rod 32, and the generated frictional force realizes the positioning of the secondary rod 32.

[0032] To facilitate the rotation of the locking sleeve 41, a plurality of anti-slip grooves 5 are provided on the outer wall of the locking sleeve 41.

[0033] The above-mentioned rotary telescopic assembly includes an auxiliary motor 61 and a power cylinder 62. The rotating shaft 611 of the auxiliary motor 61 is connected to the main rod 31 through a linkage structure 7, and the auxiliary motor 61 is fixed to the positioning table 2. The linkage structure 7 includes a first gear 71 and a second gear 72. The first gear 71 is fixed on the rotating shaft 611 and is coaxially arranged with the rotating shaft 611; the second gear 72 is fixed on the main rod 31 and is coaxially arranged with the main rod 31. The first gear 71 and the second gear 72 are always kept meshed. The axes of the first gear 71 and the second gear 72 are parallel. Both the first gear 71 and the second gear 72 are spur gears.

[0034] The telescopic shaft 621 of the power cylinder 62 is rotatably connected to the main rod 31 through a bearing 63; the main rod 31 is supported by the telescopic shaft 621. The axis of the telescopic shaft 621 is coaxially arranged with the axis of the main rod 31. The power cylinder 62 is a pneumatic cylinder.

[0035] Accordingly, when the power cylinder 62 is started, the main rod 31 can be pushed along its own length direction through the bearing 63. When the auxiliary motor 61 is started, the main rod 31 can drive the secondary rod 32 to rotate synchronously.

[0036] One end of the secondary rod 32 far from the main rod 31 is connected to the grinding rod 91 through an elastic component 8.

[0037] The elastic component 8 includes a guiding rod 81, a guiding groove 82, and an elastic member 83. The guiding rod 81 is fixed on the outer wall of the grinding rod 91, and the length direction of the guiding rod 81 is parallel to the length direction of the grinding rod 91. The guiding groove 82 is provided on the inner wall of the secondary rod 32, and the length direction of the guiding groove 82 is parallel to the length direction of the secondary rod 32. The grinding rod 91 is slidably connected to the secondary rod 32, and the guiding rod 81 is slidably connected to the guiding groove 82. Both ends of the elastic member 83 are respectively fixedly connected to the inner wall of the auxiliary rod 3 and the grinding rod 91. The elastic member 83 is a spring.

[0038] One end of the grinding rod 91 far from the secondary rod 32 is provided with a grinding groove 92 for abutting against the crank connecting rod.

[0039] A lighting lamp 93 is connected to the fixing table, and the lighting lamp 93 is close to the crank connecting rod.

[0040] The extension line of the axis of the grinding rod 91 is perpendicular to the axis of the crank connecting rod.

[0041] Of course, the above are only typical examples of the present utility model. In addition, the present utility model can also have many other specific implementation manners. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present utility model.

Claims

1. A sewing machine crankshaft connecting rod grinding machine, comprising a workbench (1), characterized in that: A power motor (11) is fixedly connected to the described workbench (1). The power shaft of the power motor (11) is connected to an installation rod (12). An installation hole (13) is formed in the installation rod (12). When the sewing machine crankshaft penetrates into the installation hole (13), the crankshaft connecting rod is coaxially arranged with the installation rod (12). A fixing bolt (14) for abutting against the sewing machine crankshaft is threadedly connected to the installation rod (12). A positioning table (2) is fixedly connected to the workbench (1). A rotary telescopic assembly is arranged on the positioning table (2). The rotary telescopic assembly is connected to an auxiliary rod (3). The auxiliary rod (3) is connected to a grinding rod (91) through an elastic force assembly (8). A grinding groove (92) for abutting against the crankshaft connecting rod is formed in the grinding rod (91).

2. The sewing machine crankshaft connecting rod grinding machine according to claim 1, characterized in that: The described rotary telescopic assembly includes an auxiliary motor (61) and a power cylinder (62). The rotary shaft (611) of the auxiliary motor (61) is connected to the auxiliary rod (3) through a linkage structure (7). The telescopic shaft (621) of the power cylinder (62) is rotatably connected to the auxiliary rod (3).

3. A sewing machine crankshaft connecting rod grinding machine according to claim 2, characterized in that: The linkage structure (7) includes a first gear (71) and a second gear (72). The first gear (71) is fixed on the rotary shaft (611) and is coaxially arranged with the rotary shaft (611). The second gear (72) is fixed on the auxiliary rod (3) and is coaxially arranged with the auxiliary rod (3). The first gear (71) meshes with the second gear (72). The axes of the first gear (71), the second gear (72), and the telescopic shaft (621) are all parallelly arranged.

4. A sewing machine crankshaft connecting rod grinding machine according to claim 3, characterized in that: The elastic force assembly (8) includes a guiding rod (81), a guiding groove (82), and an elastic member (83). The guiding rod (81) is fixed on the outer wall of the grinding rod (91). The guiding groove (82) is formed in the inner wall of the auxiliary rod (3). The guiding rod (81) is slidably connected in the guiding groove (82). The two ends of the elastic member (83) are respectively connected to the inner wall of the auxiliary rod (3) and the grinding rod (91).

5. A sewing machine crankshaft connecting rod grinding machine according to claim 4, characterized in that: A lighting lamp (93) is connected to the positioning table (2). The lighting lamp (93) is close to the crankshaft connecting rod.

6. A sewing machine crankshaft connecting rod grinding machine according to claim 4, characterized in that: The auxiliary rod (3) includes a main rod (31) and a sub-rod (32). One end of the main rod (31) is fixedly connected to the second gear (72). A placement hole is formed at the other end of the main rod (31). One end of the sub-rod (32) is slidably connected in the placement hole. The other end of the sub-rod (32) is connected to the grinding rod (91) through an elastic force assembly (8). The main rod (31) is connected to the sub-rod (32) through a positioning structure (4).

7. A sewing machine crankshaft connecting rod grinding machine according to claim 6, characterized in that: The described positioning structure (4) includes a locking sleeve (41), an elastic plate (42), a pressure ring (43), and a guiding inclined surface (44). A plurality of the elastic plates (42) are fixed to the end of the main rod (31). The pressure ring (43) is fixed to the inner wall of the locking sleeve (41). The guiding inclined surface (44) is formed on the pressure ring (43) and is used to abut against the end of the elastic plate (42). The locking sleeve (41) is threadedly connected to the outer wall of the main rod (31). The elastic plate (42) is used to tightly abut against the outer wall of the auxiliary rod (32).

8. A sewing machine crankshaft connecting rod grinding machine according to claim 7, characterized in that: A plurality of anti-slip grooves (5) are formed on the outer wall of the described locking sleeve (41).

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