Movable scroll plate with V-shaped groove and taper hole for auxiliary positioning

Abstract

The invention relates to the technical field of scroll compressors, in particular to a movable scroll plate with a V-shaped groove and a taper hole for auxiliary positioning, the movable scroll plate comprises a base plate and a molded line surface, the base plate is of a circular structure, the molded line surface is spirally fixed at the top of the base plate, a bearing ring is arranged at the center of the bottom of the base plate, and the bearing ring is fixed at the bottom of the base plate. A plurality of pin grooves are formed in the outer edge of the base plate in an annular array mode. A V-shaped ring groove is formed in the middle of the outer wall of the base plate, and a taper hole is formed in the rear end of the V-shaped ring groove. The V-shaped annular groove is formed in the outer wall of the base plate and matched with the rear V-shaped block and the front V-shaped block on the clamp to form surrounding type positioning, and the radial and angular freedom degrees are effectively restrained; axial accurate positioning is further achieved through cooperation of the taper hole and the positioning pin, complete positioning of the movable scroll plate can be achieved in one-time clamping, and the installation centering performance of the movable scroll plate is remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of scroll compressor, and particularly relates to a movable scroll disc with V-shaped groove and conical hole auxiliary positioning. BACKGROUND

[0002] The movable scroll disc is a core component of the scroll compressor, and its performance depends on the machining precision of the profile surface and the fitting precision of the bearing mounting surface. The dimensional precision and geometric and position precision of the scroll tooth profile directly determine the sealing effect of the gas compression chamber, and affect the sealing performance and energy consumption level of the compressor. Meanwhile, the perpendicularity and coaxiality between the movable scroll disc and the bearing mounting surface and other key geometric and position tolerances determine the meshing state and running stability of the movable scroll disc and the static scroll disc. Only when the dimensional precision and geometric and position precision of the movable scroll disc are ensured, can the scroll compressor still have excellent sealing performance, higher energy efficiency ratio and better reliability under high load working conditions, so as to ensure its stable operation and prolong its service life.

[0003] At present, the mainstream machining method of the movable scroll disc has the following problems. 1. Three-axis machine tool multi-clamping method: first, the spring expansion sleeve or three-jaw chuck or special fixture inner supporting type positioning bearing hole is used on the machining center, the scroll surface is machined with the rough base of the blank bearing hole, then the workpiece is turned over, the three-jaw chuck or special fixture is used to position and machine the back bearing hole, other holes and the back end surface of the movable scroll disc. This method needs two or more times of clamping, and the cumulative error is large. Since the machining precision of the profile surface and the bearing hole of the scroll disc is relatively high, this machining method may not finally guarantee the geometric and position precision of the scroll tooth profile relative to the bearing mounting surface (such as the perpendicularity and profile of the profile surface; the parallelism and flatness of the end surface), and the production efficiency is low.

[0004] 2. Five-axis machine tool one-time clamping method: this method can theoretically complete the machining of various main features (such as bearing hole, profile surface, end surface, etc.) of the movable scroll disc in one-time clamping, so as to eliminate the cumulative error of multi-clamping, and reduce the error reflection due to the good rigidity of the process system. However, due to the lack of high-precision positioning reference of the existing movable scroll disc structure (usually only a simple cylindrical surface), one-time clamping faces the following difficulties.

[0005] ① Difficulty in circumferential positioning: The cylindrical surface cannot provide accurate circumferential angular positioning, making it difficult to ensure that the endpoints of the inner and outer volutes of the moving scroll plate are consistent with the starting position of the fixture. The starting angle and unfolding angle of the scroll teeth of the moving scroll plate have strict phase requirements. Without circumferential positioning, the starting position of the tooth profile is random for each clamping or indexing operation. When machining multiple teeth or complex features, there is no definite reference for each indexing operation, and errors will accumulate continuously, seriously affecting the machining accuracy of the profile surface. If circumferential positioning is lacking, the positions of all auxiliary features related to the circumferential position will be incorrect during part machining. These machining errors caused by the lack of circumferential positioning will prevent the scroll lines of the moving and stationary plates from meshing precisely.

[0006] ② Difficulty in Axial Positioning: If axial positioning is inaccurate, the axial cutting depth (Z-axis) of the tool lacks a unified reference when machining the profile groove of the moving scroll plate. This leads to inconsistencies in the profile depth in the circumferential direction, with some areas being higher and others lower, thus affecting the machining accuracy of the profile and resulting in uneven axial meshing clearance when assembled with the stationary plate. Too small a clearance can cause friction or even jamming; too large a clearance can cause severe internal leakage, significantly reducing compressor efficiency and performance. Without an axial positioning reference, the parallelism and flatness of the moving plate end face relative to the mounting reference surface cannot be guaranteed. Poor flatness and parallelism will result in poor contact between the moving plate end face and the stationary plate end face, leading to leakage in the scroll compressor and increasing the local contact stress on the sealing surface during operation, causing end face wear and shortening its lifespan.

[0007] ③ Excessive clamping force: Clamping force usually acts directly on the cylindrical surface. Excessive clamping force will cause elastic deformation of the thin-walled moving scroll, and the stress will be released after machining, resulting in springback, which will seriously affect the machining accuracy of the profile; insufficient clamping force will result in poor rigidity of the process system, easy vibration during cutting, affecting surface quality and dimensional and positional accuracy, and accelerated tool wear.

[0008] Therefore, the existing structure of the moving scroll plate cannot meet the requirements of good circumferential positioning and axial positioning. There is an urgent need for a new type of moving scroll plate structure to solve the positioning and clamping problems in high-precision single-clamping machining. Summary of the Invention

[0009] The purpose of this invention is to overcome the shortcomings of the prior art and provide a moving scroll plate with V-groove and tapered hole for auxiliary positioning. By setting a V-groove on the outer wall of the substrate, and cooperating with the rear V-block and front V-block on the fixture to form a ring-shaped positioning, the radial and angular degrees of freedom are effectively constrained. The cooperation between the tapered hole and the positioning pin further realizes axial precision positioning, and the moving scroll plate can be completely positioned in one clamping, which significantly improves the installation and alignment of the moving scroll plate.

[0010] To achieve the objective of this invention, the technical solution adopted by this invention is as follows: This invention discloses a moving scroll disk with V-groove and conical hole for auxiliary positioning, comprising a base plate and a profiled surface. The base plate has a circular structure, and the profiled surface is spirally fixed to the top of the base plate. A bearing ring is provided at the bottom center of the base plate, and a plurality of pin grooves are arranged in a ring array on the outer edge of the base plate. A V-shaped annular groove is provided in the middle of the outer wall of the base plate, and a conical hole is provided at the rear end of the V-shaped annular groove.

[0011] A counterweight groove is provided between adjacent pin grooves, and the counterweight groove is roughly fan-shaped with a wider outer edge and a narrower inner edge.

[0012] The substrate is clamped by a fixture, which includes a rear semi-circular ring, a rear V-block, a positioning pin, a front semi-circular ring, and a front V-block. Both the rear and front semi-circular rings are semi-circular ring structures. The rear V-block and the front V-block are respectively provided in the middle of the front wall of the rear semi-circular ring and the rear wall of the front semi-circular ring. The rear V-block and the front V-block are semi-circular ring structures with a "V" shaped cross-section. The positioning pin is provided in the middle of the front wall of the rear V-block, which matches and engages with the tapered hole. The front semi-circular ring is clamped to form an annular structure with the rear semi-circular ring by a clamping mechanism. The rear V-block and the front V-block form an annular structure that matches and engages with the V-shaped annular groove.

[0013] The rear semicircular ring is fixed to the rear fixing block, which has a square structure and a rear semicircular groove for fixing the rear semicircular ring in the middle of its front wall. Slide rails are fixed to the top and bottom of the front sides of the rear fixing block. The front semicircular ring is fixed to the front fixing block, which has a square structure and a front semicircular groove for fixing the front semicircular ring in the middle of its rear wall. Slider blocks that slide in cooperation with the slide rails are fixed to the top and bottom of the front sides of the front fixing block. The front fixing block is driven by a clamping mechanism to slide along the slide rails and cooperate with the rear fixing block to clamp the substrate.

[0014] The clamping mechanism includes an eccentric block, a limiting bolt, and a top block. The bottom slide rail has a square structure with a groove at its top that slides in conjunction with the slider. The rear end of the slide rail is connected to both sides of the bottom front end of the rear fixing block, and the front end of the slide rail extends to the front of the front fixing block. The top of the eccentric block has an eccentric hole for the limiting bolt to pass through, and the front end of the slide rail has a threaded hole that matches the external thread of the limiting bolt. The top block is disposed on both sides of the front wall of the front fixing block. The front wall of the top block can contact the outer wall of the eccentric block. When the side of the outer wall of the eccentric block with a larger distance from the eccentric hole contacts the outer wall of the top block, the rear end of the front fixing block contacts the front end of the rear fixing block.

[0015] One side of the eccentric block is connected to a lever, and the end of the lever forms a hook-shaped structure.

[0016] A rubber strip is fixed to the inclined surface of the inner wall of the V-shaped annular groove.

[0017] The beneficial effects of this invention are as follows: (1) The present invention provides a V-shaped annular groove on the outer wall of the substrate, which, together with the rear V-block and the front V-block on the fixture, forms an encircling positioning, effectively constraining the radial and angular degrees of freedom; the cooperation between the tapered hole and the positioning pin further realizes the axial precise positioning, and the complete positioning of the moving scroll disk can be achieved in one clamping, which significantly improves the installation centering of the moving scroll disk; (2) The “surface contact” between the V-shaped groove and the annular V-block of the present invention replaces the traditional “line contact” or “point contact” clamping, resulting in a larger contact area, higher rigidity, reduced processing error due to clamping deformation, stronger load-bearing capacity, uniform stress distribution, avoidance of stress concentration, better resistance to vibration and impact, and better wear resistance. (3) The present invention achieves rapid and accurate positioning and clamping by using the V-shaped annular groove and conical hole of the moving scroll plate to cooperate with the fixture, which significantly improves the processing and assembly quality. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a bottom view of the present invention; Figure 3 This is a schematic diagram of the fixture holding the substrate in this invention; Figure 4 This is a top view of the fixture holding the substrate in this invention; Figure 5 for Figure 4 A cross-sectional view along AA; Figure 6 for Figure 4 A cross-sectional view along BB; Figure 7 This is a schematic diagram of the fixture in this invention.

[0019] In the attached diagram, 1 is the base plate, 2 is the shaped surface, 3 is the V-shaped annular groove, 4 is the conical hole, 5 is the clamp, 6 is the rubber strip, 7 is the clamping mechanism, 11 is the bearing ring, 12 is the pin groove, 13 is the counterweight groove, 51 is the rear semi-circular ring, 52 is the rear V-block, 53 is the positioning pin, 54 is the front semi-circular ring, 55 is the front V-block, 56 is the rear fixing block, 57 is the rear semi-circular groove, 58 is the slide rail, 59 is the front fixing block, 60 is the front semi-circular groove, 61 is the slider, 62 is the slide groove, 71 is the eccentric block, 72 is the toggle block, 73 is the limit bolt, 74 is the top block, 75 is the eccentric hole, and 76 is the threaded hole. Detailed Implementation

[0020] The present invention will be further described below: Please see Figures 1-7 , This invention discloses a moving scroll plate with V-groove and conical hole for auxiliary positioning, comprising a base plate 1 and a profiled surface 2. The base plate 1 has a circular structure, and the profiled surface 2 is spirally fixed to the top of the base plate 1. A bearing ring 11 is provided at the center of the bottom of the base plate 1, and a plurality of pin grooves 12 are arranged in a ring on the outer edge of the base plate 1. A V-groove 3 is provided in the middle of the outer wall of the base plate 1, and a conical hole 4 is provided at the rear end of the V-groove 3. By providing the V-groove 3 on the outer wall of the base plate 1, a ring-shaped arrangement is formed with the rear V-block 52 and the front V-block 55 on the clamp 5. Positioning effectively constrains radial and angular degrees of freedom; the fit between the tapered hole 4 and the positioning pin 53 further achieves precise axial positioning, enabling complete positioning of the moving scroll in a single clamping operation, significantly improving the installation alignment of the moving scroll; the "surface contact" between the V-shaped groove 3 and the annular V-block replaces the traditional "line contact" or "point contact" clamping, resulting in a larger contact area, higher rigidity, reduced machining error reflection caused by clamping deformation, stronger load-bearing capacity, more uniform stress distribution, avoidance of stress concentration, and better resistance to vibration and impact and wear.

[0021] A counterweight groove 13 is provided between adjacent pin grooves 12. The counterweight groove 13 is roughly fan-shaped with a wider outer edge and a narrower inner edge.

[0022] Furthermore, the substrate 1 is clamped by a clamp 5, which includes a rear semi-circular ring 51, a rear V-block 52, a positioning pin 53, a front semi-circular ring 54, and a front V-block 55. The rear semi-circular ring 51 and the front semi-circular ring 54 are both semi-circular ring structures. The rear V-block 52 and the front V-block 55 are respectively provided in the middle of the front wall of the rear semi-circular ring 51 and the rear wall of the front semi-circular ring 54. The rear V-block 52 and the front V-block 55 are semi-circular ring structures with a "V" shaped cross-section. The positioning pin 53 is provided in the middle of the front wall of the rear V-block 52, which matches and engages with the tapered hole 4. The front semi-circular ring 54 is connected to the rear semi-circular ring 51 to form an annular structure by a clamping mechanism 7. The rear V-block 52 and the front V-block 55 form an annular structure that matches and engages with the V-shaped annular groove 3. The clamp 5 adopts a split structure of front and rear semi-circular rings. The clamping mechanism 7 clamps the two together, which can achieve quick centering and clamping.

[0023] Furthermore, the rear semicircular ring 51 is fixed to the rear fixing block 56. The rear fixing block 56 has a square structure, and its front wall has a rear semicircular groove 57 for fixing the rear semicircular ring 51. The top and bottom of the front sides of the rear fixing block 56 are fixed with slide rails 58. The front semicircular ring 54 is fixed to the front fixing block 59. The front fixing block 59 has a square structure, and its rear wall has a front semicircular groove 60 for fixing the front semicircular ring 54. The top and bottom of the front sides of the front fixing block 59 are fixed with sliders 61 that slide in cooperation with the slide rails 58. The front fixing block 59 is driven by the clamping mechanism 7 to slide along the slide rails 58 and cooperate with the rear fixing block 56 to clamp the base plate 1. With the guide of the slide rails 58 and sliders 61, quick centering and clamping can be achieved.

[0024] Furthermore, the clamping mechanism 7 includes an eccentric block 71, a limiting bolt 73, and a top block 74. The bottom slide rail 58 has a square structure, and its top is provided with a slide groove 62 that slides in conjunction with the slider 61. The rear end of the slide rail 58 is connected to both sides of the bottom front end of the rear fixing block 56. The front end of the slide rail 58 extends to the front of the front fixing block 59. The top of the eccentric block 71 is provided with an eccentric hole 75 for the limiting bolt 73 to pass through. The front end of the slide rail 58 is provided with a threaded hole 76 that matches the external thread of the limiting bolt 73. The top block 74 is disposed on both sides of the front wall of the front fixing block 59. The front wall of the top block 74 can contact the outer wall of the eccentric block 71. When the side of the outer wall of the eccentric block 71 with a larger distance from the eccentric hole 75 contacts the outer wall of the top block 74, the rear end of the front fixing block 59 contacts the front end of the rear fixing block 56. When the eccentric block 71 is rotated so that the side of its outer wall with a larger distance from the eccentric hole 75 contacts the top block 74, the front fixing block 59 is pushed backward, causing the front V-block 55 and the rear V-block 52 to close, clamping the V-shaped annular groove 3 of the moving scroll plate. At this time, the front semi-circular ring 54 and the rear semi-circular ring 51 are closed to form a complete annular structure. During disassembly, the eccentric block 71 is rotated in the opposite direction so that its thinner side is disengaged from the top block 74, and the front fixing block 59 can move forward along the slide rail 58, and the clamp can be released.

[0025] In addition, the clamping mechanism also has a limit function. Loosening the limit bolt 73 to move it upwards releases the pressure on the eccentric block 71, allowing the eccentric block 71 to rotate, driving the front fixing block 59 to move backward and clamp the workpiece. After clamping in place, tightening the limit bolt 73 in the opposite direction causes the bottom of its nut to press against the top of the eccentric block 71, thus locking the eccentric block 71 and preventing accidental rotation during processing that could cause clamping failure.

[0026] Furthermore, a lever 72 is connected to one side of the eccentric block 71, and the end of the lever 72 forms a hook-shaped structure, which makes it easy for the user to apply force to rotate the eccentric block 71 through the lever 72.

[0027] Furthermore, a rubber strip 6 (such as silicone or fluororubber) is fixed on the inclined inner wall of the V-shaped annular groove 3. Utilizing its elastic buffering effect, the clamping force can be further homogenized, reducing the elastic deformation of the substrate and profile surface caused by clamping.

[0028] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A moving scroll disk with V-groove and conical hole for auxiliary positioning, characterized in that: It includes a substrate (1) and a profile surface (2). The substrate (1) has a circular structure, the profile surface (2) is fixed to the top of the substrate (1) in a spiral shape, the bottom center of the substrate (1) is provided with a bearing ring (11), and the outer edge of the substrate (1) has a number of pin grooves (12) arranged in a ring. The outer wall of the substrate (1) is provided with a V-shaped annular groove (3), and the rear end of the V-shaped annular groove (3) is provided with a tapered hole (4).

2. The moving scroll disk with V-groove and conical hole auxiliary positioning according to claim 1, characterized in that: A counterweight groove (13) is provided between adjacent pin grooves (12), and the counterweight groove (13) is roughly a fan-shaped structure with a wider outer edge and a narrower inner edge.

3. A moving scroll plate with V-groove and conical hole for auxiliary positioning according to claim 1, characterized in that: The substrate (1) is clamped by a clamp (5), which includes a rear semi-circular ring (51), a rear V-block (52), a positioning pin (53), a front semi-circular ring (54), and a front V-block (55). The rear semi-circular ring (51) and the front semi-circular ring (54) are both semi-circular ring structures. The rear V-block (52) and the front V-block (55) are respectively provided in the middle of the front wall of the rear semi-circular ring (51) and the rear wall of the front semi-circular ring (54). Block (52) and front V-block (55) are semi-circular ring structures with a "V" shaped cross-section. The middle of the front wall of the rear V-block (52) is provided with the positioning pin (53) that matches and engages with the tapered hole (4). The front semi-circular ring (54) is connected to the rear semi-circular ring (51) by a clamping mechanism (7) to form an annular structure. The rear V-block (52) and front V-block (55) form an annular structure that matches and engages with the V-shaped annular groove (3).

4. A moving scroll disk with V-groove and conical hole auxiliary positioning according to claim 3, characterized in that: The rear semicircular ring (51) is fixed on the rear fixing block (56). The rear fixing block (56) has a square structure and a rear semicircular groove (57) for fixing the rear semicircular ring (51) is provided in the middle of its front wall. The top and bottom of the front sides of the rear fixing block (56) are fixed with slide rails (58). The front semicircular ring (54) is fixed on the front fixing block (59). The front fixing block (59) has a square structure and a front semicircular groove (60) for fixing the front semicircular ring (54) is provided in the middle of its rear wall. The top and bottom of the front sides of the front fixing block (59) are fixed with sliders (61) that cooperate with the slide rails (58). The front fixing block (59) is driven by the clamping mechanism (7) to slide along the slide rails (58) and cooperate with the rear fixing block (56) to clamp the substrate (1).

5. A moving scroll disk with V-groove and conical hole auxiliary positioning according to claim 4, characterized in that: The clamping mechanism (7) includes an eccentric block (71), a limiting bolt (73), and a top block (74). The bottom slide rail (58) has a square structure, and its top is provided with a slide groove (62) that slides in conjunction with the slider (61). The rear end of the slide rail (58) is connected to the bottom front end of the rear fixing block (56) on both sides. The front end of the slide rail (58) extends to the front of the front fixing block (59). The top of the eccentric block (71) is provided with an eccentric hole for the limiting bolt (73) to pass through. (75) The front end of the slide rail (58) is provided with a threaded hole (76) that matches the external thread of the limiting bolt (73); the top block (74) is disposed on both sides of the front wall of the front fixing block (59), and the front wall of the top block (74) can contact the outer wall of the eccentric block (71). When the side of the outer wall of the eccentric block (71) that is further away from the eccentric hole (75) contacts the outer wall of the top block (74), the rear end of the front fixing block (59) contacts the front end of the rear fixing block (56).

6. A moving scroll disk with V-groove and conical hole for auxiliary positioning according to claim 5, characterized in that: One side of the eccentric block (71) is connected to a lever (72), and the end of the lever (72) forms a hook-shaped structure.

7. A moving scroll disk with V-groove and conical hole auxiliary positioning according to claim 6, characterized in that: A rubber strip (6) is fixed on the inclined inner wall of the V-shaped annular groove (3).

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