Chain transmission valve grinding machine convenient to move
By using a telescopic chain drive structure and a multi-degree-of-freedom adjustment mechanism, the problem of the valve grinding machine body being difficult to adjust is solved, thus improving grinding efficiency and applicability while reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-23
- Publication Date
- 2026-03-31
AI Technical Summary
Existing valve grinding machines are difficult to adjust and have low grinding flexibility, resulting in reduced applicability. Furthermore, their transmission structure is complex and costly.
It adopts a telescopic chain drive structure, combined with a machine body fixing, adjustment and axial clamping mechanism, to achieve multi-degree-of-freedom adjustment and stable connection, thereby improving grinding efficiency.
It achieves flexible adjustment and stable connection of the machine body, improves grinding efficiency and applicability, and reduces transmission noise and manufacturing costs.
Smart Images
Figure CN224059529U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of grinding machine technology, and in particular to a valve grinding machine. Background Technology
[0002] High-temperature and high-pressure valves are widely used in industries such as petroleum, chemical, and power. The integrity of their sealing surfaces directly affects the valve's performance and service life. Because valve sealing surfaces are susceptible to wear, corrosion, and deformation under high-temperature and high-pressure environments, regular grinding and repair are necessary. Existing valve grinding machines primarily use gear drives, such as the multi-functional valve grinding machine with authorization announcement number CN201109064Y. This results in insufficient strength and torque, and its complex structure hinders movement. During valve sealing surface grinding and repair, gear teeth are easily damaged, reducing work efficiency and increasing operating costs. Furthermore, existing valve grinding machines mainly use direct motor drive to transmit power, making it difficult to guarantee the required torque during grinding. In addition, existing chain-type valve grinding machines, such as the chain-type valve grinding machine with publication number CN 211029608 U, although using chain drive, have a simple fixed structure and the machine body is not easily adjustable, resulting in insufficient grinding flexibility and significantly reducing the applicability of the device. Utility Model Content
[0003] To address the shortcomings in the aforementioned background technology, this utility model proposes a portable chain-driven valve grinding machine, which solves the problems of difficult machine body adjustment and low grinding flexibility in the prior art.
[0004] The technical solution of this utility model is implemented as follows: A portable chain-driven valve grinding machine includes a telescopic body, a power mechanism at the rear of the telescopic body, and a grinding head at the front of the telescopic body. The power mechanism is connected to the grinding head via a chain mechanism installed inside the telescopic body. A body fixing mechanism and a body adjusting mechanism are located below the telescopic body. The body adjusting mechanism is detachably connected to the telescopic body, and the body fixing mechanism is connected to the body adjusting mechanism. An axial clamping mechanism is connected to the rear of the body adjusting mechanism and is detachably connected to the telescopic body. The body fixing mechanism can stably fix the machine to the valve, ensuring stability; the body adjusting mechanism can achieve multi-degree-of-freedom adjustment of the grinding head driven by the machine body, improving the grinding flexibility of the grinding head and further improving grinding efficiency.
[0005] In a further preferred embodiment, the body fixing mechanism includes a support frame, a support plate seat on the support frame, a fixed clamping block on the top of the support plate seat, a vertically arranged first lead screw and a first guide rod inside the support plate seat, a movable clamping block threadedly connected to the first lead screw and slidingly engaged with the first guide rod, fastening pressure heads on the opposing surfaces of the movable clamping block and the fixed clamping block, and a first handwheel extending out of the support plate seat from the lower part of the first lead screw.
[0006] In a further preferred embodiment, the body adjustment mechanism includes an L-shaped support plate, which is hinged to a support frame via a first pin. A threaded bushing is provided on the support frame, and the threaded bushing is hinged to the support frame via a second pin. A second lead screw is internally threaded onto the threaded bushing. A support rod is provided at the lower part of the L-shaped support plate, and a second handwheel is provided at one end of the second lead screw, while the other end is hinged to the support rod.
[0007] Further preferably, the upper part of the L-shaped support plate is provided with a clamping mechanism; the clamping mechanism includes a third lead screw arranged longitudinally at the front of the L-shaped support plate, the third lead screw is a double-ended stud, and symmetrically arranged clamping blocks are threaded onto the double-ended stud. The clamping blocks are matched with the guide rail arranged at the lower part of the telescopic body, and the clamping blocks are slidably engaged with the positioning slide rail arranged longitudinally on the L-shaped support plate; a third handwheel is provided at one end of the third lead screw extending out of the L-shaped support plate; the third handwheel drives the third lead screw to rotate, so that the two clamping blocks are clamped on the guide rail.
[0008] In a further preferred embodiment, the upper part of the L-shaped support plate is also provided with a left-right adjustment mechanism. The left-right adjustment mechanism includes a fourth lead screw and a support guide rod arranged longitudinally at the rear of the L-shaped support plate. A nut support block is threadedly connected to the fourth lead screw, and the nut support block slides with the support guide rod. One end of the fourth lead screw extends out of the L-shaped support plate and is provided with a fourth handwheel.
[0009] Further preferably, the axial clamping mechanism includes a support base and a nut pushing block. A horizontally arranged threaded sleeve is fixedly provided on the support base. A pushing screw is threadedly connected to the threaded sleeve. The front end of the pushing screw extends out of the threaded sleeve and is connected to the nut pushing block. A handle is provided at the rear end of the pushing screw. A U-shaped bracket is provided on the top of the support base. The U-shaped bracket matches the guide rail provided at the bottom of the telescopic body. A clamping screw corresponding to the guide rail is provided on the side wall of the U-shaped bracket. Both the support base and the nut pushing block are provided with corresponding positioning light holes. A push rod is provided in the positioning light hole. The front end of the push rod is inserted into the positioning groove provided at the rear of the nut support block.
[0010] Further preferably, the telescopic body includes a large-diameter front body and a small-diameter rear body, with the front part of the small-diameter rear body interlocking with the rear part of the large-diameter front body and fixed by long bolts.
[0011] In a further preferred embodiment, the power mechanism includes an electric drill mounted on the small-diameter rear end body. The output shaft of the electric drill is connected to a reducer. The rotating shaft of the reducer extends into the small-diameter rear end body, and both the upper and lower ends of the rotating shaft are connected to the small-diameter rear end body through a first bearing. The first bearing is limited within the small-diameter rear end body by a lower cover plate.
[0012] Further preferably, the grinding head includes a drive shaft rotatably disposed inside the front end of the large-diameter front end body. Both the upper and lower ends of the drive shaft are connected to the large-diameter front end body through second bearings. The second bearings are respectively limited within the large-diameter front end body by the upper end cover and the lower end cover. The lower end of the drive shaft is axially connected to a ball head shaft. The ball head shaft extends out of the lower end cover and is hinged to a connecting plate. A grinding disc is provided on the connecting plate.
[0013] In a further preferred embodiment, the chain mechanism includes a driving sprocket connected to a rotating shaft and a driven sprocket connected to a transmission shaft, with the driving sprocket and the driven sprocket connected by a chain drive.
[0014] The beneficial effects of this utility model are as follows: This grinding machine, by using chain drive instead of gear shaft and gear drive, has the advantages of simple structure, high strength, low noise, smooth transmission, low manufacturing cost, and easy mobility, making it particularly suitable for on-site maintenance. Furthermore, a reducer is installed between the rear end of the machine body and the output power drill, increasing the output torque; and the machine body adopts a telescopic structure design, facilitating chain installation and tension adjustment, ensuring optimal chain operation, and improving the grinding efficiency of the machine. This grinding machine is easily developed into a series of products and has a wide range of applications.
[0015] This invention enables rapid and stable connection to multiple valves via a fixed body mechanism. The body adjustment mechanism, through the cooperation of a clamping mechanism, a left-right adjustment mechanism, and an axial clamping mechanism, allows for vertical swinging, horizontal and vertical movement of the body, enabling multi-dimensional adjustment of the grinding head relative to the valve. This improves the flexibility and applicability of the device, further enhancing the grinding efficiency of the valves. The body adjustment mechanism is detachably connected to the body, and the axial clamping mechanism is detachably connected to the telescopic body, facilitating assembly and disassembly, quick station changes, and easy relocation. Attached Figure Description
[0016] To more clearly illustrate the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0018] Figure 2This is a schematic internal cross-sectional view of the present invention;
[0019] Figure 3 for Figure 2 Enlarged view of a portion of point A in the middle;
[0020] Figure 4 for Figure 2 Enlarged view of a section at point B in the middle;
[0021] Figure 5 for Figure 2 Enlarged view of a section at point C;
[0022] Figure 6 This is a front view schematic diagram of the fuselage fixing mechanism;
[0023] Figure 7 This is a schematic diagram of the fuselage adjustment mechanism from the isometric view. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] Example 1, as Figure 1As shown, a portable chain-driven valve grinding machine includes a telescopic body 100, whose length can be adjusted within a certain range. The telescopic body serves as a support mechanism for the grinding head and power mechanism. A power mechanism 200 is located at the rear of the telescopic body 100, providing power for the rotation of the grinding head. A grinding head 300 is located at the front of the telescopic body 100. The power mechanism 200 is connected to the grinding head 300 via a chain mechanism located within the telescopic body 100, driving the grinding head to rotate smoothly and improving grinding efficiency and quality. In this embodiment, a body fixing mechanism 400 and a body adjusting mechanism 500 are located below the telescopic body 100. The body fixing mechanism is used to fix the body to the valve, providing support for the grinding machine. The body adjusting mechanism 500 is detachably connected to the telescopic body 100, facilitating easy assembly and disassembly and relocation. The fuselage fixing mechanism 400 is connected to the fuselage adjusting mechanism 500, integrating fuselage adjustment and fixing into a compact structure. An axial clamping mechanism 600 is connected to the rear of the fuselage adjusting mechanism 500; the axial direction refers to the length direction of the fuselage. The axial clamping mechanism 600 is detachably connected to the telescopic fuselage 100, facilitating easy assembly and disassembly and relocation. The axial clamping mechanism 600 clamps and adjusts the fuselage adjusting mechanism 500 along its length, ensuring the stability of the fuselage adjusting mechanism while also allowing for length-wise position adjustment of the fuselage, further improving the stability and flexibility of the entire device.
[0026] Example 2, as Figure 2 , 6 As shown, a portable chain-driven valve grinding machine, based on embodiment 1, is preferably described in this embodiment. The machine body fixing mechanism 400 includes a support frame 18, on which a support plate seat 24 is provided, so as to... Figure 1For example, the support plate seat is fixed to the front of the support frame 18 by the pressure plate 20 and the locking screw 21. The top of the support plate seat 24 is provided with a fixing clamping block 26. The support plate seat 24 is provided with a vertically arranged first lead screw 59 and a first guide rod 60, which are arranged in parallel. The support frame 18 is provided with a support rod sleeve 62, which is fixed at the inner and outer ends of the support frame by an outer locking nut 23 and an inner locking nut 61, respectively. The first lead screw passes through the support rod sleeve 62 and can rotate relative to the support rod sleeve. The first lead screw 59 is threadedly connected to a movable clamping block 25, which slides with the first guide rod 60. The movable clamping block 25 and the fixed clamping block 26 are both provided with fastening pressure heads 27 on their opposing surfaces. The lower part of the first lead screw 59 extends out of the support plate seat 24 and is connected to a first handwheel 22. Rotating the first handwheel causes the first lead screw to rotate, which in turn drives the movable clamping block 25 to move up and down along the first guide rod, thereby adjusting the distance between the movable clamping block 25 and the fixed clamping block 26. The movable clamping block 25 moves closer to the fixed clamping block 26 to clamp the valve, thus achieving the purpose of fixing the machine body by the body fixing mechanism.
[0027] As a preferred option, such as Figure 7 As shown, the fuselage adjustment mechanism 500 in this embodiment includes an L-shaped support plate 1, which is hinged to a support frame 18 via a first pin 72. The L-shaped support plate 1 can swing up and down relative to the support frame around the first pin. A threaded bushing 68 is provided on the support frame 18, which is hinged to the support frame 18 via a second pin 17. A second lead screw 19 is internally threaded onto the threaded bushing 68. The second lead screw rotates around the second pin via the threaded bushing, which is used to push the L-shaped support plate 1 to swing up and down. A support rod 67 is provided at the lower part of the L-shaped support plate 1. One end of the second lead screw 19 is provided with a second handwheel 16, and the other end is hinged to the support rod 67. The hinge method between the second lead screw and the support rod 67 is as follows: a through hole is provided on the support rod, and the second lead screw passes through the through hole and is limited by a retaining ring or a cotter pin; the hinge method is also that the end of the second lead screw is hinged to the support rod 67 in the form of a ball joint. The specific working process is as follows: rotating the second handwheel 16 in the forward direction drives the second lead screw to rotate in the forward direction. The second lead screw extends out relative to the threaded bushing 68, pushing the lower part of the L-shaped support plate 1, causing the L-shaped support plate 1 to swing up and down relative to the support frame around the first pin shaft, thereby adjusting the position of the machine body connected to the L-shaped support plate.
[0028] In this embodiment, the L-shaped support plate 1 is provided with a clamping mechanism on its upper part. The clamping mechanism is used to clamp and fix the body adjustment mechanism to the machine body. Specifically, the clamping mechanism includes a third lead screw 69 arranged longitudinally at the front of the L-shaped support plate 1. The third lead screw 69 is a double-ended stud, and two symmetrically arranged clamping blocks 39 are threaded onto the double-ended stud. The clamping blocks 39 are matched with the guide rail 28 arranged at the lower part of the telescopic machine body 100. The two clamping blocks 39 can be clamped on the guide rail by relative movement. It should be noted that the guide rail can be made of I-beam steel, while the cross-section of the clamping blocks is U-shaped, which can clamp the I-beam steel structure from both sides. The clamping blocks 39 slide in cooperation with the positioning slide rail arranged longitudinally on the L-shaped support plate 1. The positioning slide rail restricts the clamping blocks to move only longitudinally. A third handwheel 37 is provided at one end of the third lead screw 69 extending out of the L-shaped support plate 1. The third handwheel 37 drives the third lead screw 69 to rotate, so that the two clamping blocks 39 can be clamped on the guide rail 28. In actual operation, rotating the third hand lever clockwise causes the third lead screw to rotate, and the two clamping blocks move relative to each other until they are clamped onto the guide rail 28, thus achieving clamping and fixing of the machine body.
[0029] Example 3, as Figure 7 As shown, a portable chain-driven valve grinding machine, based on embodiment 2, preferably includes a left-right adjustment mechanism on the upper part of the L-shaped support plate 1; the left-right adjustment mechanism can adjust the machine body within a certain range to the left and right. In this embodiment, the left-right adjustment mechanism includes a fourth lead screw 65 and a support guide rod 64 arranged longitudinally at the rear of the L-shaped support plate 1. The support guide rod 64 is parallel to the fourth lead screw 65. The number of support guide rods can be set to one or two as needed. A nut support block 40 is threaded onto the fourth lead screw 65, contacting the bottom of the machine body. The nut support block 40 slides with the support guide rod 64. One end of the fourth lead screw 65 extends out of the L-shaped support plate 1 and is equipped with a fourth handwheel 2. During operation, the clamping mechanism is released, and the fourth handwheel is rotated clockwise. The rotation of the fourth lead screw drives the nut support block to continue moving longitudinally left and right along the support guide rod; the machine body moves with the nut support block; after the machine body is in a suitable position, the clamping mechanism clamps it.
[0030] In this embodiment, the axial clamping mechanism 600 includes a support base 15 and a nut pushing block 3. A horizontally arranged threaded sleeve 14 is fixed on the support base 15, with the horizontal direction being the length direction of the machine body. A pushing screw 4 is internally threaded into the threaded sleeve 14; rotating the pushing screw allows for lateral extension and retraction relative to the threaded sleeve. The front end of the pushing screw 4 extends out of the threaded sleeve 14 and connects to the nut pushing block 3. The front end of the pushing screw is inserted into a positioning hole provided on the nut pushing block, allowing the pushing screw to rotate within the positioning hole and drive the nut pushing block to move back and forth. The rear end of the push screw 4 is equipped with a handle 9. Rotating the handle drives the push screw 4 to rotate. The top of the support base 15 is equipped with a U-shaped bracket, which matches the guide rail 28 located at the lower part of the telescopic body 100. The side wall of the U-shaped bracket is equipped with a tightening screw 5 corresponding to the guide rail 28. When the tightening screw 5 is tightened against the side wall of the guide rail, the support base and the body are fixedly connected. The support base 15 and the nut push block 3 are both equipped with corresponding positioning light holes. The positioning light holes are equipped with push rods 6. The front end of the push rod 6 is inserted into the positioning groove 66 located at the rear of the nut support block 40. In actual operation, the clamping mechanism and the body fixing mechanism are in the loose state. Rotating the handle in the forward direction drives the push screw to rotate, which then drives the nut push block to move laterally, pushing the nut support block 40 to move laterally, thereby realizing the lateral adjustment of the body fixing mechanism relative to the body. This can also be understood as adjusting the distance of the body extending from the L-shaped support plate, that is, adjusting the front and rear of the body.
[0031] like Figure 4 As shown, the telescopic body 100 in this embodiment includes a large-diameter front body 36 and a small-diameter rear body 13. The front part of the small-diameter rear body 13 is inserted into and fixed to the rear part of the large-diameter front body 36 by a long bolt 49. The long bolt 49 is locked by a washer 51 and a nut 52. After the rear body is adjusted into place in the front body, the rear body and the front body are fastened together by bolts and nuts. Locking washers are installed on the bolts to prevent the nuts from loosening, forming a chain tension adjustment mechanism for adjusting the chain tension.
[0032] like Figure 5 As shown, the power mechanism 200 in this embodiment includes an electric drill 8 mounted on the small-diameter rear end body 13. The output shaft of the electric drill 8 is connected to a reducer 7, which is connected to the rear end body by screws. The rotating shaft 56 of the reducer 7 extends into the small-diameter rear end body 13, and both the upper and lower ends of the rotating shaft 56 are connected to the small-diameter rear end body 13 by first bearings 55. The first bearing 55 is limited in the small-diameter rear end body 13 by a lower cover plate 12, and the lower cover 12 is connected to the small-diameter rear end body by fixing screws 11. A rear cover 10 is provided at the rear of the small-diameter rear end body 13, so that the first bearing is in a relatively closed cavity and is protected from dust.
[0033] In addition, such as Figure 3As shown, the grinding head 300 includes a drive shaft 43 rotatably disposed inside the front end of the large-diameter front end body 36. Both the upper and lower ends of the drive shaft 43 are connected to the large-diameter front end body 36 through second bearings 42. The second bearings 42 are respectively limited within the large-diameter front end body 36 by an upper end cover 34 and a lower end cover 32. The upper end cover 34 and the lower end cover 32 are respectively connected to the large-diameter front end body by screws 71. A ball head shaft 46 is axially connected to the lower end of the drive shaft 43. The ball head shaft 46 extends out of the lower end cover 32 and is hinged to a connecting plate 29. The ball head shaft 46 is limited in the circular groove of the connecting plate 29 by a snap ring 47. A grinding disc 30 is connected to the connecting plate 29 by screws 31.
[0034] The chain mechanism includes a driving sprocket 53 connected to a rotating shaft 56 and a driven sprocket 44 connected to a transmission shaft 43. The driving sprocket 53 and the driven sprocket 44 are connected by a chain 50. The driving sprocket 53 is connected to the rotating shaft 56 via key I 54, and the driven sprocket 44 is connected to the transmission shaft 43 via key II 48. This chain mechanism achieves stable power transmission from the electric drill to the grinding head.
[0035] This utility model has been manufactured as a physical prototype. Its specific working process is as follows: The movable clamping block 25 is adjusted via the first handwheel 22 of the machine body fixing mechanism 400. The movable clamping block 25 and the fixed clamping block 26 clamp the valve. Then, the machine body is placed on the U-shaped bracket at the top of the L-shaped support plate 1 and the support base 15. The tightening screw 5 is tightened onto the guide rail 28. Then, the handle 9 is rotated, and the push screw 4 pushes the nut support block 40, causing the machine body to move backward, reducing the distance the machine body extends forward beyond the L-shaped support plate. Then, the nut support block 40 can be moved longitudinally by rotating the fourth handwheel 2. Move left and right to adjust the left and right position of the machine body; when the machine body is in the appropriate position, the two clamping blocks 39 of the clamping mechanism clamp onto the guide rail 28, completing the fixed connection between the machine body and the L-shaped support plate 1. Then, during the grinding process, by rotating the second handwheel 16, the second lead screw is driven to rotate in the forward direction. The second lead screw extends relative to the threaded bushing 68, pushing the lower part of the L-shaped support plate 1, causing the L-shaped support plate 1 to swing up and down relative to the support frame around the first pin shaft, thus realizing the up and down swing of the machine body. Through the above operation, the grinding head can be adjusted in multiple dimensions relative to the valve, improving the flexibility and applicability of the device.
[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A portable chain-driven valve grinding machine, characterized in that: The device includes a telescopic body (100), a power mechanism (200) at the rear of the telescopic body (100), and a grinding head (300) at the front of the telescopic body (100). The power mechanism (200) is connected to the grinding head (300) via a chain mechanism located inside the telescopic body (100). A body fixing mechanism (400) and a body adjusting mechanism (500) are located below the telescopic body (100). The body adjusting mechanism (500) is detachably connected to the telescopic body (100). The body fixing mechanism (400) is connected to the body adjusting mechanism (500). An axial clamping mechanism (600) is connected to the rear of the body adjusting mechanism (500). The axial clamping mechanism (600) is detachably connected to the telescopic body (100).
2. The portable chain-driven valve grinding machine according to claim 1, characterized in that: The fuselage fixing mechanism (400) includes a support frame (18), a support plate seat (24) is provided on the support frame (18), a fixed clamping block (26) is provided on the top of the support plate seat (24), a first lead screw (59) and a first guide rod (60) are provided in the support plate seat (24) and are arranged vertically. A movable clamping block (25) is threaded on the first lead screw (59) and the movable clamping block (25) slides with the first guide rod (60). A fastening pressure head (27) is provided on the opposite surface of the movable clamping block (25) and the fixed clamping block (26). The lower part of the first lead screw (59) extends out of the support plate seat (24) and is connected to a first handwheel (22).
3. The portable chain-driven valve grinding machine according to claim 2, characterized in that: The fuselage adjustment mechanism (500) includes an L-shaped support plate (1), which is hinged to the support frame (18) via a first pin (72). The support frame (18) is provided with a threaded bushing (68), which is hinged to the support frame (18) via a second pin (17). The threaded bushing (68) is internally threaded with a second lead screw (19). The lower part of the L-shaped support plate (1) is provided with a support rod (67). One end of the second lead screw (19) is provided with a second handwheel (16), and the other end is hinged to the support rod (67).
4. The portable chain-driven valve grinding machine according to claim 3, characterized in that: The L-shaped support plate (1) is provided with a clamping mechanism on its upper part; the clamping mechanism includes a third lead screw (69) arranged longitudinally at the front of the L-shaped support plate (1), the third lead screw (69) is a double-ended stud, and the double-ended stud is threaded with symmetrically arranged clamping blocks (39), the clamping blocks (39) are matched with the guide rail (28) arranged at the lower part of the telescopic body (100), and the clamping blocks (39) are slidably engaged with the positioning slide rail arranged longitudinally on the L-shaped support plate (1); a third handwheel (37) is provided at one end of the third lead screw (69) extending out of the L-shaped support plate (1); the third handwheel (37) drives the third lead screw (69) to rotate so that the two clamping blocks (39) can be clamped on the guide rail (28).
5. The portable chain-driven valve grinding machine according to claim 3 or 4, characterized in that: The upper part of the L-shaped support plate (1) is also provided with a left and right adjustment mechanism. The left and right adjustment mechanism includes a fourth lead screw (65) and a support guide rod (64) arranged longitudinally at the rear of the L-shaped support plate (1). A nut support block (40) is threaded on the fourth lead screw (65). The nut support block (40) and the support guide rod (64) are slidably engaged. One end of the fourth lead screw (65) extends out of the L-shaped support plate (1) and is provided with a fourth handwheel (2).
6. The portable chain-driven valve grinding machine according to claim 5, characterized in that: The axial clamping mechanism (600) includes a support base (15) and a nut push block (3). A threaded sleeve (14) is fixedly provided on the support base (15). A push screw (4) is threadedly connected inside the threaded sleeve (14). The front end of the push screw (4) extends out of the threaded sleeve (14) and is connected to the nut push block (3). A handle (9) is provided at the rear end of the push screw (4). A U-shaped card seat is provided on the top of the support base (15). The U-shaped card seat matches the guide rail (28) provided at the bottom of the telescopic body (100). A clamping screw (5) corresponding to the guide rail (28) is provided on the side wall of the U-shaped card seat. Corresponding positioning light holes are provided on both the support base (15) and the nut push block (3). A push rod (6) is provided in the positioning light hole. The front end of the push rod (6) is inserted into the positioning groove (66) provided at the rear of the nut support block (40).
7. The portable chain-driven valve grinding machine according to claim 1 or 6, characterized in that: The telescopic fuselage (100) includes a large-diameter front fuselage (36) and a small-diameter rear fuselage (13). The front of the small-diameter rear fuselage (13) is inserted into the rear of the large-diameter front fuselage (36) and fixed by long bolts (49).
8. The portable chain-driven valve grinding machine according to claim 7, characterized in that: The power mechanism (200) includes an electric drill (8) mounted on the small-diameter rear end body (13). The output shaft of the electric drill (8) is connected to a reducer (7). The rotating shaft (56) of the reducer (7) extends into the small-diameter rear end body (13), and both the upper and lower ends of the rotating shaft (56) are connected to the small-diameter rear end body (13) through a first bearing (55). The first bearing (55) is limited in the small-diameter rear end body (13) by a lower cover plate (12).
9. The portable chain-driven valve grinding machine according to claim 8, characterized in that: The grinding head (300) includes a drive shaft (43) rotatably disposed inside the front end of the large-diameter front end body (36). Both the upper and lower ends of the drive shaft (43) are connected to the large-diameter front end body (36) through a second bearing (42). The second bearing (42) is limited within the large-diameter front end body (36) by an upper end cover (34) and a lower end cover (32), respectively. A ball head shaft (46) is axially connected to the lower end of the drive shaft (43). The ball head shaft (46) extends out of the lower end cover (32) and is hinged to a connecting plate (29). A grinding disc (30) is provided on the connecting plate (29).
10. The portable chain-driven valve grinding machine according to claim 9, characterized in that: The chain mechanism includes a drive sprocket (53) connected to a rotating shaft (56) and a driven sprocket (44) connected to a transmission shaft (43). The drive sprocket (53) and the driven sprocket (44) are connected by a chain (50).
Citation Information
Patent Citations
Multifunctional valve grinding machine
CN201109064Y
Chain type valve grinding machine
CN211029608U