A top rod locking device for a center hole grinder

Abstract

The utility model relates to the field of center grinder, especially a top rod locking device for center hole grinder, including grinder frame, the vertical setting of grinder frame front side surface has the guide, the bottom sliding fit of guide has tailstock device, the sliding fit of three top center clamping unit has above the guide and be located the tailstock device, the upper surface of grinder frame front side is located the above setting of guide has the grinding head spare, three top center clamping unit includes sliding block, upper top center frame, movable snap ring, top rod locking rod cover, top rod limiting mechanism, the vertical sliding fit of sliding block is on the guide, the utility model three top center clamping unit combines the fine adjustment structure of top rod locking rod cover and screw rod, supports quick clamping and high accuracy regulation, top center rod passes through the ball locking mechanism fixed, ensures the clamping force stability in the processing, avoids work piece deviation, effectively improved the flexible stability of clamping.

Description

Technical Field

[0001] This utility model relates to the field of center grinding machine technology, and in particular to a top rod locking device for a center hole grinding machine. Background Technology

[0002] Currently, there are two main methods for machining center holes. One method involves scraping and grinding the center hole using multi-edged centers and centers. This method results in poor machining accuracy, low success rate, and is time-consuming, labor-intensive, and inefficient. The other method involves machining the center hole using a center hole grinder. Existing center hole grinders often use fixed center structure clamping devices, which have limited adjustment range and are difficult to adapt to the machining requirements of workpieces of different sizes. Furthermore, manual operation is cumbersome and makes it difficult to achieve precise fine-tuning. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a center hole grinding machine top rod locking device.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A center hole grinding machine has a push rod locking device, which includes a grinding machine frame. A guide rail is vertically arranged on the front surface of the grinding machine frame. A tailstock device is slidably fitted at the bottom of the guide rail. A three-center clamping unit is slidably fitted on the guide rail and above the tailstock device. A grinding head component is arranged on the front surface of the grinding machine frame above the guide rail.

[0006] The three-center clamping unit includes a slider, an upper center frame, a movable retaining ring, a top rod locking sleeve, and a top rod limiting mechanism. The slider slides vertically on the guide rail.

[0007] Furthermore, in a preferred configuration, an upper center frame is vertically mounted on the movable retaining ring, which is used to cooperate with the tailstock device. The top rod locking sleeves are evenly arranged horizontally on the movable retaining ring, and a top rod limiting mechanism is installed at the bottom of the movable retaining ring and below the top rod locking sleeves.

[0008] Furthermore, in a preferred configuration, the movable retaining ring is mounted on the front surface of the slider, and multiple limiting grooves are evenly arranged laterally on the bottom of the outer wall of the top rod locking sleeve. These limiting grooves are used to be locked by the top rod limiting mechanism, and a top rod is slidably fitted inside the top rod locking sleeve.

[0009] In addition, a preferred structure is that one end of the top rod is provided with a top head for clamping the workpiece, and the other end is provided with a first screw hole, at which a screw is screwed and fitted, and the screw is rotatably disposed inside the top rod locking sleeve.

[0010] In addition, a preferred structure is that one end of the screw has a threaded portion on its outer surface for screwing into the first screw hole, and the other end has a second screw hole with a screw screwed into it. The screw is located at the other end of the top rod locking sleeve away from the top tip.

[0011] In addition, a preferred structure is that the screw has a ball bearing hole at the other end of the second screw hole away from the screw inlet, and a ball bearing is slidably fitted in the ball bearing hole, with the pointed end of the screw used to hold the ball bearing in place.

[0012] Furthermore, in a preferred configuration, the push rod limiting mechanism includes a limiting mechanism mounting block, which is mounted on the bottom of the movable retaining ring. The limiting mechanism mounting block has a through hole for sliding of the push rod. A limiting block is provided at the top of the push rod, which passes through the movable retaining ring and locks into the limiting groove. A spring is provided on the push rod body, with the top of the spring abutting against the limiting block and the bottom of the spring abutting against the bottom end of the push rod.

[0013] The beneficial effects of this utility model are as follows: This utility model's three-center clamping unit combines the fine-tuning structure of the top rod locking sleeve and the screw, supporting rapid clamping and high-precision adjustment. The top rod is fixed by the ball locking mechanism, ensuring stable clamping force during processing, avoiding workpiece displacement, and effectively improving the flexibility and stability of clamping. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a center hole grinding machine;

[0015] Figure 2 This is a structural schematic diagram of the grinding machine frame from the front view.

[0016] Figure 3 A schematic diagram of the structure in the closed state of the active retaining ring;

[0017] Figure 4 This is a schematic diagram of the structure after the movable retaining ring and the upper center frame are disassembled.

[0018] Figure 5 A schematic diagram of the structure in the open position of the active retaining ring;

[0019] Figure 6 This is a schematic diagram of the top rod limiting mechanism;

[0020] Figure 7 This is a schematic diagram of the internal structure of the top rod locking sleeve;

[0021] Figure 8 This is a schematic diagram of the screw structure.

[0022] In the diagram: 01 Grinding machine frame, 02 Guide rail, 03 Tailstock assembly, 04 Three-center clamping unit, 05 Grinding head assembly, 07 Slider, 08 Upper center frame, 1. Movable retaining ring, 2 Push rod locking sleeve, 21 Limiting groove, 22 Center rod, 221 Center head, 222 First screw hole, 23 Screw, 231 Threaded part, 232 Second screw hole, 233 Ball movable hole, 24 Screw, 25 Ball, 3 Push rod limiting mechanism, 31 Limiting mechanism mounting block, 32 Push rod, 33 Spring, 34 Limiting block. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Reference Figure 1-8 A center hole grinding machine has a push rod locking device, which includes a grinding machine frame 01. A guide rail 02 is vertically arranged on the front surface of the grinding machine frame 01. A tailstock device 03 is slidably fitted at the bottom of the guide rail 02. A three-center clamping unit 04 is slidably fitted on the guide rail 02 and above the tailstock device 03. A grinding head component 05 is arranged on the front surface of the grinding machine frame 01 above the guide rail 02. The three-center clamping unit 04 includes a slider 07, an upper center frame 08, a movable retaining ring 1, a push rod locking sleeve 2, and a push rod limiting mechanism 3. The slider 07 is vertically slidably fitted on the guide rail 02, and the push rod locking sleeve 2 is used for clamping the workpiece.

[0025] In addition, an upper center frame 08 is vertically mounted on the movable retaining ring 1. The upper center frame 08 is used to cooperate with the tailstock device 03. The top rod locking sleeve 2 is evenly arranged horizontally on the movable retaining ring 1. A top rod limiting mechanism 3 is installed at the bottom of the movable retaining ring 1 and below the top rod locking sleeve 2. The movable retaining ring 1 is installed on the front surface of the slider 07. Multiple limiting grooves 21 are evenly arranged in the transverse direction at the bottom of the outer wall of the top rod locking sleeve 2. The limiting grooves 21 are used to be locked by the top rod limiting mechanism 3. The top rod 22 is slidably fitted inside the top rod locking sleeve 2. Rotating the screw 23 can adjust the length of the top rod 22 extending from the top rod locking sleeve 2.

[0026] Meanwhile, one end of the center rod 22 is provided with a center head 221 for clamping the workpiece, and the other end is provided with a first screw hole 222. A screw rod 23 is screwed into the first screw hole 222. The screw rod 23 is rotatably disposed inside the top rod locking sleeve 2. One end of the screw rod 23 is provided with a threaded part 231 for screwing into the first screw hole 222, and the other end is provided with a second screw hole 232. A screw 24 is screwed into the second screw hole 232. The screw 24 is located at the end of the top rod locking sleeve 2 away from the center head 221. The other end of the screw rod 23 located away from the entrance of the screw 24 in the second screw hole 232 is connected to a ball movement hole 233. A ball 25 is slidably fitted into the ball movement hole 233. The pointed end of the screw 24 is used to press against the ball 25. The screw 24 is used to lock the ball 25, thereby locking the screw rod 23.

[0027] Meanwhile, the push rod limiting mechanism 3 includes a limiting mechanism mounting block 31, which is installed at the bottom of the movable retaining ring 1. The limiting mechanism mounting block 31 has a through hole for the push rod 32 to slide. The top of the push rod 32 is provided with a limiting block 34, which passes through the movable retaining ring 1 and locks into the limiting groove 21. A spring 33 is provided on the push rod 32. The top of the spring 33 abuts against the limiting block 34, and the bottom of the spring 33 abuts against the bottom end of the push rod 32. The spring 33 realizes the reset of the push rod 32.

[0028] In this embodiment, when grinding with a center hole grinder, the workpiece body is clamped by a three-center clamping device 04. The bottom of the workpiece is held in place by the lower center of the tail end device 03. After the workpiece is placed at the center of the movable retaining ring 1, the height of the movable retaining ring 1 is adjusted by adjusting the slider 07 so that it can be clamped in a suitable position. The workpiece is held in place by adjusting the top rod locking sleeve 2. When adjusting the top rod locking sleeve 2, the screw 24 is first turned out a certain distance from the second screw hole 232 so that the tip of the screw 24 no longer presses against the ball 25. The ball 25 can move in the ball movable hole 233, and the operator can then rotate the screw 23.

[0029] As the screw 23 rotates, the threaded part 231 rotates within the first threaded hole 222. The tip rod 22 rotates with the threaded part 231, extending or retracting at the end of the tip rod locking sleeve 2. This allows the tip rod 221 to be adjusted to press against the outer wall of the workpiece. After adjusting the tip rod 22, the screw 24 can be turned so that the tip of the screw 24 presses against the ball 25 again. The ball 25 then pushes out of the ball movement hole 233 and contacts the inner wall of the tip rod locking sleeve 2, thus preventing the screw 232 from rotating and locking it in place.

[0030] The rotating screw 23 is used for fine adjustment of the extension length of the tip 221. When a large adjustment is required, the top rod limiting mechanism 3 is used to adjust the distance of the extension of the entire top rod locking sleeve 2. By pulling down the push rod 32, the spring 33 contracts, thereby causing the limiting block 34 to separate from the limiting groove 21. At this time, the top rod locking sleeve 2 on the movable retaining ring 1 can be slid. After adjustment, the push rod 32 is released, the spring 33 releases its elastic potential energy, and the spring 33 resets, driving the push 32 to reset, so that the limiting block 34 can be re-engaged into the limiting groove 21.

[0031] In this utility model, the three-center clamping unit 04, combined with the fine-tuning structure of the top rod locking sleeve 2 and the screw 23, supports quick clamping and high-precision adjustment. The top rod 22 is fixed by the ball 25 locking mechanism to ensure stable clamping force during processing, avoid workpiece displacement, and effectively improve the flexibility and stability of clamping.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A locking device for a center hole grinding machine, comprising a grinding machine frame (01), characterized in that, A guide rail (02) is vertically arranged on the front surface of the grinding machine frame (01). A tailstock device (03) is slidably fitted at the bottom of the guide rail (02). A three-center clamping unit (04) is slidably fitted on the guide rail (02) and above the tailstock device (03). A grinding head component (05) is arranged on the front surface of the grinding machine frame (01) above the guide rail (02). The three-center clamping unit (04) includes a slider (07), an upper center frame (08), a movable retaining ring (1), a top rod locking sleeve (2), and a top rod limiting mechanism (3). The slider (07) slides vertically on the guide rail (02).

2. The center hole grinding machine's push rod locking device according to claim 1, characterized in that, The movable retaining ring (1) is vertically mounted with an upper center frame (08), which is used to cooperate with the tail frame device (03). The top rod locking sleeves (2) are evenly arranged and horizontally distributed on the movable retaining ring (1). The bottom of the movable retaining ring (1) and below the top rod locking sleeves (2) are all equipped with a top rod limiting mechanism (3).

3. The center hole grinding machine's push rod locking device according to claim 2, characterized in that, The movable retaining ring (1) is installed on the front surface of the slider (07). Multiple limiting grooves (21) are evenly arranged in the horizontal direction at the bottom of the outer wall of the top rod locking sleeve (2). The limiting grooves (21) are used to be locked by the top rod limiting mechanism (3). The top rod (22) is slidably fitted inside the top rod locking sleeve (2).

4. The center hole grinding machine's push rod locking device according to claim 3, characterized in that, One end of the top rod (22) is provided with a top head (221) for clamping the workpiece, and the other end is provided with a first screw hole (222). A screw rod (23) is screwed into the first screw hole (222), and the screw rod (23) is rotatably disposed inside the top rod locking sleeve (2).

5. A center hole grinding machine push rod locking device according to claim 4, characterized in that, The screw (23) has a threaded part (231) on the outside of one end of the rod body for screwing into the first screw hole (222), and a second screw hole (232) is opened at the other end. A screw (24) is screwed into the second screw hole (232). The screw (24) is located at the other end of the top rod locking sleeve (2) away from the top tip (221).

6. The center hole grinding machine's push rod locking device according to claim 5, characterized in that, The screw (23) is located at the other end of the second screw hole (232) away from the entrance of the mounting screw (24) and is connected to a ball movement hole (233). A ball (25) is slidably fitted in the ball movement hole (233), and the pointed end of the screw (24) is used to hold the ball (25).

7. A center hole grinding machine push rod locking device according to claim 3, characterized in that, The top rod limiting mechanism (3) includes a limiting mechanism mounting block (31), which is installed at the bottom of the movable retaining ring (1). The limiting mechanism mounting block (31) has a through hole for sliding of the push rod (32). The top of the push rod (32) is provided with a limiting block (34). The limiting block (34) passes through the movable retaining ring (1) and locks the limiting groove (21). The push rod (32) is provided with a spring (33). The top of the spring (33) abuts against the limiting block (34), and the bottom of the spring (33) abuts against the bottom end of the push rod (32).

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