Marine bevel gear quenching fixture

Abstract

The utility model relates to heat treatment frock clamp technical field discloses a marine spiral bevel gear quenching fixture, including machine body, clamping mechanism and replacement mechanism, the sliding slot is opened in the machine body inner wall, clamping mechanism includes cylinder, round block and connecting rod assembly, cylinder drive round block drives multiple connecting rods synchronous movement, the last end of connecting block no.

Description

Technical Field

[0001] This utility model relates to the field of heat treatment tooling and fixture technology, and in particular to a quenching fixture for marine spiral bevel gears. Background Technology

[0002] As a key transmission component in marine propulsion systems, marine spiral bevel gears directly affect the operational stability and safety of ships. During the manufacturing process, quenching is an important heat treatment process to improve the surface hardness, wear resistance, and fatigue strength of the gears. In order to ensure the quality of quenching, special fixtures are needed to clamp and fix the gears at high temperatures to prevent deformation during rapid cooling.

[0003] However, existing spiral bevel gear quenching fixtures have significant limitations in practical use. Marine gears are large and heavy, and during quenching, they must withstand not only extremely high temperature changes but also the intense impact of quenching oil flow. Traditional fixtures often use simple suspension or support methods, lacking effective forced guidance and rigid constraint structures. This causes the gears to easily experience slight axial movement, displacement, or even tilting under the impact of the oil. This positional instability directly leads to excessive deformation after quenching, severely affecting the centering accuracy and meshing quality of the gears. In addition, marine gears come in a wide variety of specifications and models, with different models often having different inner hole dimensions and cone angles. Existing fixtures have a one-piece design for the clamping components and drive mechanism, which cannot be flexibly adjusted or replaced according to the specific specifications of the gears. When different models of gears need to be processed, it is often necessary to replace the entire set of bulky fixtures. This not only increases the investment cost of tooling equipment but also greatly reduces the changeover efficiency of the production line, making it difficult to meet the needs of multi-variety, small-batch production.

[0004] Therefore, this utility model proposes a quenching fixture for marine spiral bevel gears to overcome the shortcomings of the prior art. Utility Model Content

[0005] In view of the problems existing in the marine spiral bevel gear quenching fixture, such as the lack of effective forced guidance and rigid constraint structure, which makes the gears prone to lateral movement and displacement under high temperature and oil impact, and the inability of the clamping components to quickly adapt to different specifications of gears, resulting in poor versatility and low changeover efficiency, this utility model aims to provide a marine spiral bevel gear quenching fixture with an improved structure that can effectively solve the above problems.

[0006] This utility model provides a marine spiral bevel gear quenching fixture, including a body and a clamping mechanism installed inside the body. The inner wall of the body is provided with a sliding groove. The clamping mechanism includes a cylinder fixedly connected to the body and a round block fixedly connected to the output end of the cylinder.

[0007] The outer wall of the circular block is fixedly connected to a connecting block one. One end of a connecting rod is rotatably connected to the outer wall of the connecting block one. The other end of the connecting rod is rotatably connected to a connecting block two. A replacement mechanism is provided at the end of the connecting block two. The clamping plate is installed at the end of the connecting block two through the replacement mechanism. The replacement mechanism includes a fixing block fixedly connected to the inner side of the clamping plate and a positioning groove formed on the outer wall of the fixing block. The end of the connecting block two slides into the interior of the positioning groove, and the shape of the end of the connecting block two matches the shape of the positioning groove. A threaded groove is formed on the top wall of the fixing block, and the threaded groove is also formed on the top wall of the connecting block two. When the end of the connecting block two slides into the positioning groove, the threaded groove on the fixing block and the threaded groove on the connecting block two are aligned with each other.

[0008] Furthermore, a slider is fixedly connected to the bottom of the clamping plate, and the slider is slidably connected inside the slide groove. The slider forces the clamping plate to reciprocate along the radial direction limited by the slide groove. Through the cylinder, the connecting rod transmission assembly, the replacement mechanism, and the precise cooperation between the slider and the slide groove, automatic centering and clamping of the spiral bevel gear and quick replacement of the clamping assembly are achieved.

[0009] Preferably, the replacement mechanism further includes a bolt, which is threaded into the threaded groove of the fixed block and the second connecting block after alignment. The bolt locks the clamping plate and the second connecting block to prevent separation during quenching impact.

[0010] Preferably, the replacement mechanism further includes a disc spring, which is disposed at the top of the threaded groove. The bolt passes through the disc spring and is screwed into the threaded groove. The disc spring is pressed between the head of the bolt and the top wall of the fixing block. The high-temperature rebound performance of the disc spring provides a continuous axial preload to prevent the bolt from loosening.

[0011] Preferably, the end shape of the second connecting block is specifically set as a T-shaped structure or a dovetail structure, and the cross-sectional shape of the positioning groove on the fixing block is consistent with the end cross-sectional shape of the second connecting block. This interlocking cross-sectional shape design increases the rigidity of the connection and prevents the clamping plate from falling off.

[0012] Preferably, a plurality of connecting blocks are fixedly connected at equal intervals along the circumference of the outer wall of the circular block. The uniform distribution of power is ensured through the circumferentially distributed structural design.

[0013] Preferably, the plurality of connecting blocks one are rotatably connected to the plurality of connecting blocks two via the plurality of connecting rods, and the ends of the plurality of connecting blocks two are connected to the plurality of clamping plates via the plurality of changing mechanisms, forming a multi-link linkage synchronous clamping system.

[0014] Preferably, the inner wall of the machine body is provided with a plurality of sliding grooves at equal intervals along the circumference of the machine body. The plurality of sliding grooves are respectively slidably engaged with a plurality of sliders at the bottom of a plurality of clamping plates to achieve synchronous centering and clamping of the plurality of clamping plates, ensuring uniform force on the gears and avoiding deformation.

[0015] Preferably, the cylinder is vertically installed at the geometric center of the bottom surface inside the machine body, and the output end of the cylinder is facing upward. The cylinder is used to drive the circular block to move in the vertical direction. The side of the clamping plate away from the fixed block is set as an arc-shaped surface that matches the shape of the inner hole of the marine spiral bevel gear, so as to increase the contact area and reduce damage to the gear surface.

[0016] This utility model has the following beneficial effects: 1. This utility model solves the problem in the prior art that the high temperature and quenching oil impact during the quenching of marine spiral bevel gears can easily cause gear movement, clamp offset or tilting, by fixing a slider to the bottom of the clamping plate and opening a radially extending groove on the inner wall of the machine body. The precise sliding fit structure between the slider and the groove forces the clamping plate to move back and forth along a limited radial straight trajectory. This achieves the effect of eliminating lateral degrees of freedom, ensuring smooth and accurate movement of the clamping plate, and thus achieving automatic centering and stable clamping of the gear.

[0017] 2. This utility model solves the problems of existing technologies where traditional clamps require replacing the entire equipment for gears with different inner hole sizes, resulting in high maintenance costs and low efficiency. It enables quick positioning by setting a replacement mechanism between the clamping plate and the drive linkage, utilizing the shape of the positioning groove of the fixed block embedded at the end of the connecting block, and rigidly fixing it by combining the anti-loosening locking structure of the bolt and the disc spring. It achieves the effect of quick disassembly and assembly of the clamping plate, flexible replacement of the appropriate clamping device according to different gear specifications, and significantly improves the equipment's versatility and production efficiency. Attached Figure Description

[0018] Figure 1 This is a perspective view of a marine spiral bevel gear quenching fixture proposed in this utility model. Figure 2 This is a partial structural diagram of a marine spiral bevel gear quenching fixture proposed in this utility model; Figure 3 This is a partial structural schematic diagram of a marine spiral bevel gear quenching fixture proposed in this utility model; Figure 4 This is a partial exploded view of the quenching fixture for marine spiral bevel gears proposed in this utility model. Figure 5 for Figure 4 Enlarged view of point A in the middle; Figure 6This is a partial structural exploded view of a marine spiral bevel gear quenching fixture proposed in this utility model.

[0019] Legend: 1. Machine body; 2. Clamping mechanism; 201. Cylinder; 202. Round block; 203. Connecting block one; 204. Connecting rod; 205. Connecting block two; 206. Clamping plate; 207. Slider; 208. Slide groove; 3. Changing mechanism; 301. Fixing block; 302. Positioning groove; 303. Threaded groove; 304. Disc spring; 305. Bolt. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Example

[0021] Please refer to Figures 1 to 6 This utility model provides a quenching fixture for marine spiral bevel gears, which aims to solve the problems in the prior art where marine spiral bevel gears are prone to misalignment or displacement due to high temperature and quenching oil impact during the quenching process, resulting in inaccurate centering, and the poor versatility of traditional fixtures due to their inability to quickly adapt to gears with different inner hole sizes.

[0022] Please refer to Figure 1 and Figure 2 The marine spiral bevel gear quenching fixture includes a body 1 and a clamping mechanism 2 installed inside the body 1. The body 1 serves as the supporting frame of the entire device, providing installation space and strength support for the internal components. The inner wall of the body 1 is provided with a sliding groove 208, which extends radially along the body 1 to forcefully guide the movement path of the clamping components. The clamping mechanism 2 is located in the internal cavity of the body 1 and is used to provide automated power output and transmission to achieve the centering and clamping action of the workpiece.

[0023] The clamping mechanism 2 includes a cylinder 201 fixedly connected to the geometric center of the bottom surface inside the body 1. The output end of the cylinder 201 is vertically arranged facing upwards to provide axial linear driving force. A circular block 202 is fixedly connected to the output end of the cylinder 201. The circular block 202 is the core component for power distribution and can move up and down in the vertical direction with the extension and retraction of the cylinder 201. Multiple connecting blocks 1 203 are fixedly connected at equal intervals along the circumferential direction on the outer wall of the circular block 202. The multiple connecting blocks 1 203 rise and fall synchronously with the circular block 202. One end of a connecting rod 204 is rotatably connected to the outer wall of each connecting block 1 203. The connecting rod 204 serves as an intermediate transmission link. The other end is rotatably connected to a connecting block 205. Through the rotatable connection between the two ends of the connecting rod 204, the vertical lifting and lowering motion of the circular block 202 and the connecting block 1 203 can be converted into the horizontal radial pushing and pulling motion of the connecting block 205.

[0024] Please refer to Figure 1 and Figure 3 A replacement mechanism 3 is provided at the end of the connecting block 205, and a clamping plate 206 is connected to the connecting block 205 through the replacement mechanism 3. The side of the clamping plate 206 facing away from the connecting block 205 is set as an arc-shaped surface that matches the shape of the inner hole of the marine spiral bevel gear, so as to directly contact and abut against the inner wall of the spiral bevel gear. In order to ensure the smooth movement and centering accuracy of the clamping plate 206, a slider 207 is fixedly connected to the bottom of the clamping plate 206. The slider 207 is slidably connected to the inside of the groove 208 opened on the inner wall of the machine body 1. The cross-sectional shape of the slider 207 is closely matched with the groove shape of the slide groove 208, so that the slider 207 is confined within the slide groove 208 and can only move back and forth along the radial straight track defined by the slide groove 208. This structural design eliminates the lateral offset or tilting of the clamping plate 206 when it is subjected to force. With the multiple slide grooves 208 equidistantly opened along the circumference of the inner wall of the machine body 1, and the corresponding multiple clamping components, multi-directional synchronous centripetal motion can be realized, thereby automatically and accurately centering and firmly clamping the spiral bevel gear.

[0025] Please refer to Figure 4 , Figure 5 and Figure 6 The replacement mechanism 3 includes a fixing block 301, which is fixedly connected to the inner side of the clamping plate 206. The outer wall of the fixing block 301 is provided with a positioning groove 302, which extends vertically. The end of the connecting block 205 is a protruding structure that matches the cross-sectional shape of the positioning groove 302, such as a T-shaped structure or a dovetail structure. The end of the connecting block 205 can slide and embed itself into the positioning groove 302 in the vertical direction. By matching the shape of the positioning groove 302 with the end of the connecting block 205, the degree of freedom of the clamping plate 206 relative to the connecting block 205 in the horizontal direction is restricted, ensuring that the clamping plate 206 will not fall off or shift when transmitting radial clamping force.

[0026] To lock the relative position of the clamping plate 206 and the connecting block 205, the top wall of the fixing block 301 is provided with a threaded groove 303, and the top wall of the connecting block 205 is also provided with a threaded groove 303. When the end of the connecting block 205 is completely slid into the positioning groove 302, the threaded groove 303 on the fixing block 301 and the threaded groove 303 on the connecting block 205 are aligned with each other and form a connected threaded hole. The replacement mechanism 3 also includes a bolt 305 and a disc spring 304. The disc spring 304 is set at the top end of the threaded groove 303. The bolt 305 passes through the disc spring 304 and is screwed into the aligned threaded groove 303. The disc spring 304 is pressed between the head of the bolt 305 and the top wall of the fixing block 301. The rebound force generated by the disc spring 304 after being deformed under pressure provides a continuous axial preload, preventing the bolt 305 from loosening in the high temperature environment of quenching and frequent vibration, thereby ensuring the firmness and reliability of the connection between the clamping plate 206 and the connecting block 205.

[0027] As a preferred embodiment, in order to further enhance the stability and load-bearing capacity of the connection between the second connecting block 205 and the fixed block 301, the end shape of the second connecting block 205 is specifically set as a T-shaped structure or a dovetail structure, and the cross-sectional shape of the positioning groove 302 on the fixed block 301 is correspondingly processed into a T-shaped groove or a dovetail groove that is consistent with the cross-sectional shape of the end of the second connecting block 205. Through this interlocking geometric shape matching, not only is the connection contact area increased, but also stronger tensile force is provided in the horizontal direction, ensuring that the connection part will not deform or separate when the clamping plate 206 applies a huge clamping force to the gear.

[0028] In another preferred embodiment, in order to achieve multi-point synchronous and uniform force application to ensure the centering accuracy of the gear, multiple connecting blocks 1 203 are fixedly connected at equal intervals along the circumference of the outer wall of the circular block 202. Correspondingly, multiple connecting blocks 1 203 are rotatably connected to multiple connecting blocks 205 through multiple connecting rods 204. The ends of multiple connecting blocks 205 are connected to multiple clamping plates 206 through multiple changing mechanisms 3. Multiple sliding grooves 208 are equally spaced along the circumference of the inner wall of the machine body 1. The multiple sliding grooves 208 slide and engage with multiple sliders 207 at the bottom of the multiple clamping plates 206. This circumferentially distributed multi-link linkage structure allows the single driving action of the cylinder 201 to be converted into a clamping action in which multiple clamping plates 206 simultaneously move towards the center, thereby achieving automatic centering.

[0029] In another preferred embodiment, to ensure the balance of power output and the verticality of clamping action, cylinder 201 is vertically installed at the geometric center of the bottom surface inside the machine body 1, with the output end of cylinder 201 facing upward. Cylinder 201 is used to drive the circular block 202 to move in the vertical direction, thereby driving the entire linkage mechanism to move symmetrically. At the same time, the side of clamping plate 206 facing away from the fixed block 301 is set as an arc surface that matches the shape of the inner hole of the marine spiral bevel gear. The radius of curvature of the arc surface matches the inner hole radius of the gear to be processed, so as to increase the contact area, reduce local pressure, and prevent damage to the workpiece surface.

[0030] Working principle: When the spiral bevel gear needs to be quenched, the spiral bevel gear is first placed into the machine body 1. Then, the cylinder 201, which is fixedly connected inside the machine body 1, is activated. Since the circular block 202 is fixedly connected to the output end of the cylinder 201, the output end of the cylinder 201 drives the circular block 202 to move vertically. Since multiple connecting blocks 1 203 are fixedly connected at equal intervals on the outer wall of the circular block 202, the circular block 202 drives the connecting blocks 1 203 to move simultaneously when it moves. Since the connecting rod 204 is rotatably connected to the outer wall of the connecting block 1 203, and the end of the connecting rod 204 is rotatably connected to the connecting block 205, the connecting block 1 203 drives the connecting block 205 to move through the transmission action of the connecting rod 204 when it moves. A replacement mechanism 3 is installed at the end of 05, and the clamping plate 206 is installed at the end of the connecting block 205 through the replacement mechanism 3. The connecting block 205 drives the clamping plate 206 to move through the replacement mechanism 3. Since the bottom of the clamping plate 206 is fixedly connected to the slider 207, and the inner wall of the machine body 1 is provided with a slide groove 208, the slider 207 is forced to slide in the slide groove 208, thereby forcing the clamping plate 206 to move linearly in the radial direction of the slide groove 208, avoiding the clamping plate 206 from shifting, tilting or rotating. Through the multiple clamping plates 206 of the clamping mechanism 2 installed in the machine body 1, which are equidistantly distributed and move synchronously, the spiral bevel gear can be automatically centered and clamped, avoiding the gear from moving or shifting due to high temperature and quenching oil impact during quenching. When it is necessary to replace the worn clamping plate 206 or adapt it to gears of different specifications, first remove the original clamping plate 206. Since a fixing block 301 is installed on the inner side of the clamping plate 206, and the outer wall of the fixing block 301 has a positioning groove 302, first slide the end of the connecting block 205 into the positioning groove 302 of the fixing block 301 to complete the initial positioning of the clamping plate 206 and the connecting block 205. Since the top wall of the fixing block 301 and the top wall of the connecting block 205 both have threaded grooves 303, when the end of the connecting block 205 slides into the positioning groove 302... When the slot 302 is in place, the two threaded slots 303 are aligned with each other. Since the top of the threaded slot 303 is provided with a bolt 305 and a disc spring 304, the bolt 305 is passed through the disc spring 304 and screwed into the threaded slot 303, thereby firmly locking the clamping plate 206 and the connecting block 205. The worn clamping plate 206 can be quickly replaced by the replacement mechanism 3. In addition, according to different specifications of marine spiral bevel gears, the corresponding size and shape of the special clamping plate 206 can be replaced without replacing the entire set of clamps, which makes it more versatile.

Claims

1. A marine spiral bevel gear quenching fixture, comprising a body (1) and a clamping mechanism (2) installed inside the body (1), wherein the inner wall of the body (1) is provided with a sliding groove (208), and the clamping mechanism (2) includes a cylinder (201) fixedly connected inside the body (1). Its features are, The output end of the cylinder (201) is fixedly connected to a round block (202), the outer wall of the round block (202) is fixedly connected to a connecting block one (203), the outer wall of the connecting block one (203) is rotatably connected to one end of a connecting rod (204), the other end of the connecting rod (204) is rotatably connected to a connecting block two (205), the end of the connecting block two (205) is provided with a replacement mechanism (3), and the end of the connecting block two (205) is fitted with a clamping plate (206) through the replacement mechanism (3). The replacement mechanism (3) includes a fixing block (301) fixedly connected to the inner side of the clamping plate (206). The outer wall of the fixing block (301) is provided with a positioning groove (302). The end of the connecting block two (205) is slidably embedded in the interior of the positioning groove (302), and the shape of the end of the connecting block two (205) is adapted to the shape of the positioning groove (302). The top wall of the fixing block (301) is provided with a threaded groove (303), and the top wall of the connecting block two (205) is also provided with the threaded groove (303). The bottom of the clamping plate (206) is fixedly connected with a slider (207). The slider (207) is slidably connected to the interior of the slide groove (208). The slider (207) forces the clamping plate (206) to reciprocate along the radial direction limited by the slide groove (208).

2. The marine spiral bevel gear quenching fixture according to claim 1, characterized in that, The replacement mechanism (3) also includes a bolt (305), which is threadedly connected to the threaded groove (303) after the fixing block (301) and the connecting block two (205) are aligned. The bolt (305) is used to lock the clamping plate (206) and the connecting block two (205).

3. A marine spiral bevel gear quenching fixture according to claim 2, characterized in that, The replacement mechanism (3) also includes a disc spring (304), which is disposed at the top of the threaded groove (303). The bolt (305) passes through the disc spring (304) and is screwed into the threaded groove (303). The disc spring (304) is pressed between the head of the bolt (305) and the top wall of the fixing block (301).

4. A marine spiral bevel gear quenching fixture according to claim 1, characterized in that, The end shape of the second connecting block (205) is set as a T-shaped structure or a dovetail structure, and the cross-sectional shape of the positioning groove (302) on the fixing block (301) is consistent with the end cross-sectional shape of the second connecting block (205).

5. A marine spiral bevel gear quenching fixture according to claim 1, characterized in that, The outer wall of the circular block (202) is fixedly connected with multiple connecting blocks (203) at equal intervals along the circumference of the circular block (202).

6. A marine spiral bevel gear quenching fixture according to claim 5, characterized in that, Multiple connecting blocks one (203) are rotatably connected to multiple connecting blocks two (205) via multiple connecting rods (204), and the ends of multiple connecting blocks two (205) are connected to multiple clamps (206) via multiple replacement mechanisms (3).

7. A marine spiral bevel gear quenching fixture according to claim 6, characterized in that, The inner wall of the machine body (1) is provided with a plurality of sliding grooves (208) at equal intervals along the circumference of the machine body (1). The plurality of sliding grooves (208) are respectively slidably engaged with the plurality of sliders (207) at the bottom of the plurality of clamping plates (206) to achieve synchronous centering and clamping of the plurality of clamping plates (206).

8. A marine spiral bevel gear quenching fixture according to claim 1, characterized in that, The cylinder (201) is vertically installed at the geometric center of the bottom surface inside the body (1), and the output end of the cylinder (201) is set upward. The cylinder (201) is used to drive the circular block (202) to move in the vertical direction. The side of the clamping plate (206) away from the fixed block (301) is set as an arc surface that matches the shape of the inner hole of the marine spiral bevel gear.

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