Height adjusting device for crankshaft inclined hole machining

Abstract

The utility model discloses a height adjusting device for crankshaft inclined hole machining. The height adjusting device solves the problem that the gravity center of a lifting platform is in front in the prior art. The device comprises a rack, a mounting seat arranged on the rack in a sliding manner, a counterweight mechanism which is arranged on the rack in a sliding manner and is connected with the mounting seat, and a driving mechanism which is arranged on the rack and is used for driving the mounting seat to operate in a sliding manner. The mounting seat is slidably mounted on the frame and is driven by the driving mechanism to slide on the frame, and the counterweight mechanism can move up and down along with the mounting seat, so that the gravity center of the mounting seat is adjusted to the driving mechanism through the counterweight mechanism, the gravity center of the mounting seat is prevented from shifting, and the service life of the driving mechanism is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of crankshaft processing equipment, and particularly relates to a height adjusting device for machining inclined holes of a crankshaft. Background Art

[0002] The crankshaft is the most important component in a compressor. The crankshaft is jointly affected by the centrifugal force of the rotating mass, the gas inertia force that changes periodically, and the reciprocating inertia force, which causes the crankshaft to bear the action of bending and torsional loads. Therefore, the crankshaft is required to have sufficient strength and stiffness, the journal surface needs to be wear-resistant, work evenly, and have good balance.

[0003] In the crankshaft inclined hole processing equipment, the lifting platform is installed on the lifting device. Since a plurality of drilling devices are installed on the lifting platform, and the drilling devices are installed at the front end of the lifting platform, the center of gravity of the lifting platform is at the front end, which causes the lifting device to bear a large force, resulting in too fast wear of the lifting device and increasing the maintenance cost of the equipment. Summary of the Utility Model

[0004] The utility model provides a height adjusting device for machining inclined holes of a crankshaft to at least solve the above partial technical problems.

[0005] To achieve the above object, the technical solution adopted by the utility model is as follows:

[0006] A height adjusting device for machining inclined holes of a crankshaft includes a frame, a mounting seat slidably arranged on the frame, a counterweight mechanism slidably arranged on the frame and connected to the mounting seat, and a driving mechanism arranged on the frame for driving the mounting seat to slide.

[0007] Further, the driving mechanism includes a guiding mechanism arranged on the frame and connected to the mounting seat, a bearing seat and a motor mounting seat arranged on the frame, a threaded rod rotatably arranged between the bearing seat and the motor mounting seat, a threaded block threadedly connected to the threaded rod and connected to the mounting seat, and a servo motor arranged on the motor mounting seat and connected to the threaded rod; a coupling is arranged between the servo motor and the threaded rod and is located inside the motor mounting seat.

[0008] Further, the guiding mechanism includes a pair of parallel slide rails arranged on the frame, and sliders slidably arranged on the slide rails and capable of sliding along the length direction of the slide rails. The mounting seat is installed on the sliders and can move synchronously with the sliders.

[0009] Further, the mounting seat is provided with a limiting groove adapted to the sliders, and the sliders are installed in the limiting groove.

[0010] Further, a relief groove adapted to the bearing seat and a mounting hole communicating with the relief groove are formed in the mounting seat; the threaded block is located in the mounting hole and is fixedly connected to the mounting seat by bolts.

[0011] Furthermore, a through connection and installation groove is provided on the motor mounting base. The coupling is located within the connection and installation groove. A bearing is provided within each of the connection and installation groove and the bearing seat, and both ends of the threaded rod are respectively installed within a bearing.

[0012] Furthermore, the counterweight mechanism includes two sets of connection mechanisms provided at the top of the frame and connected to the mounting base, and a counterweight block slidably disposed within the frame and connected to the connection mechanisms.

[0013] Furthermore, the connection mechanism includes a lifting lug A provided on the mounting base, a mounting rod provided at the top of the frame, a pair of pulleys rotatably provided on the mounting rod, a lifting lug B provided on the counterweight block, and a pulling rope having one end connected to the lifting lug A and the other end sequentially passing through the two pulleys and connected to the lifting lug B.

[0014] Furthermore, the mounting rod is provided with a pulley mounting groove adapted to the pulley, and the pulley is rotatably installed within the pulley mounting groove.

[0015] Furthermore, a counterweight mounting groove adapted to the counterweight block is provided within the frame, and the counterweight block is slidably installed within the counterweight mounting groove.

[0016] Compared with the prior art, the present utility model has the following beneficial effects:

[0017] The structure of the present utility model is simple, scientifically reasonable in design, and convenient to use. The mounting base of the present utility model is slidably installed on the frame and slides on the frame under the drive of the drive mechanism. At the same time, the counterweight mechanism can move up and down along with the mounting base, so as to adjust the center of gravity of the mounting base to the drive mechanism through the counterweight mechanism, avoid the center of gravity deviation of the mounting base, and thus improve the service life of the drive mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present utility model.

[0019] Figure 2 is Figure 1 the enlarged view at A in

[0020] Figure 3 is Figure 1 the enlarged view at B in

[0021] Figure 4 is a sectional view of the present utility model.

[0022] Figure 5 is a schematic diagram of the drive mechanism of the present utility model.

[0023] Figure 6 is an exploded view of the drive mechanism of the present utility model.

[0024] Figure 7This is a cross-sectional view of the mounting seat of the present utility model.

[0025] Figure 8 This is a schematic diagram of the motor mounting seat of the present utility model.

[0026] Figure 9 This is a schematic diagram of the guiding mechanism of the present utility model.

[0027] Figure 10 This is an exploded view of the guiding mechanism of the present utility model.

[0028] Among them, the names corresponding to the reference numerals are as follows:

[0029] 1. Frame; 2. Mounting seat; 3. Bearing seat; 4. Motor mounting seat; 5. Threaded rod; 6. Threaded block; 7. Servo motor; 8. Coupling; 9. Slide rail; 10. Slide block; 11. Limiting groove; 12. Relief groove; 13. Mounting hole; 14. Connecting mounting groove; 15. Bearing; 16. Mounting rod; 17. Pulley; 18. Counterweight; 19. Pulling rope; 20. Counterweight mounting groove; 21. Lifting lug A; 22. Lifting lug B; 23. Pulley mounting groove. Detailed implementation manners

[0030] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0031] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; of course, it can also be a mechanical connection or an electrical connection; additionally, it can be a direct connection, an indirect connection through an intermediate medium, or a communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] Embodiment 1.

[0034] As Figure 1-10 shown, a height adjustment device for machining a crankshaft inclined hole provided by the present utility model includes a frame 1, a mounting seat 2 slidably arranged on the frame 1, a counterweight mechanism slidably arranged on the frame 1 and connected to the mounting seat 2, and a driving mechanism arranged on the frame 1 for driving the mounting seat 2 to slide.

[0035] The mounting seat 2 of the present utility model is slidably mounted on the frame 1 and slides on the frame 1 driven by the driving mechanism. At the same time, the counterweight mechanism can move up and down with the mounting seat 2. The center of gravity of the mounting seat 2 can be effectively adjusted through the counterweight mechanism, so that the center of gravity of the mounting seat 2 is located on the driving mechanism, facilitating the improvement of the service life of the driving mechanism.

[0036] Embodiment 2.

[0037] As Figure 1-10 shown, a height adjustment device for machining a crankshaft inclined hole provided by the present utility model includes a frame 1, a mounting seat 2 slidably arranged on the frame 1, a counterweight mechanism slidably arranged on the frame 1 and connected to the mounting seat 2, and a driving mechanism arranged on the frame 1 for driving the mounting seat 2 to slide.

[0038] The driving mechanism includes a guiding mechanism arranged on the frame 1 and connected to the mounting seat 2, a bearing seat 3 and a motor mounting seat 4 arranged on the frame 1, a threaded rod 5 rotatably arranged between the bearing seat 3 and the motor mounting seat 4, a threaded block 6 threadedly connected to the threaded rod 5 and connected to the mounting seat 2, and a servo motor 7 arranged on the motor mounting seat 4 and connected to the threaded rod 5; a coupling 8 is arranged between the servo motor 7 and the threaded rod 5 and is located inside the motor mounting seat 4.

[0039] In the second embodiment, the guiding mechanism is installed on the frame 1 to guide the moving direction of the mounting seat 2. The bearing seat 3 and the motor mounting seat 4 are installed on the frame 1. During use, the servo motor 7 drives the threaded rod 5 to rotate through the coupling 8, so that the threaded block 6 moves along the axis of the threaded rod 5 as the threaded rod 5 rotates. Then the threaded block 6 pushes the mounting seat 2 to slide on the guiding mechanism, facilitating the adjustment of the height of the mounting seat 2 on the frame 1 for machining the inclined hole of the crankshaft.

[0040] In the second embodiment, the threaded block 6 is provided with a threaded hole adapted to the threaded rod 5, and the threaded rod 5 is threadedly connected to the threaded hole.

[0041] Embodiment 3.

[0042] As Figure 1-10 shown, a height adjusting device for machining an inclined hole of a crankshaft provided by the present utility model includes a frame 1, a mounting seat 2 slidably disposed on the frame 1, a counterweight mechanism slidably disposed on the frame 1 and connected to the mounting seat 2, and a driving mechanism disposed on the frame 1 for driving the mounting seat 2 to slide.

[0043] The driving mechanism includes a guiding mechanism disposed on the frame 1 and connected to the mounting seat 2, a bearing seat 3 and a motor mounting seat 4 disposed on the frame 1, a threaded rod 5 rotatably disposed between the bearing seat 3 and the motor mounting seat 4, a threaded block 6 threadedly connected to the threaded rod 5 and connected to the mounting seat 2, and a servo motor 7 disposed on the motor mounting seat 4 and connected to the threaded rod 5; a coupling 8 is disposed between the servo motor 7 and the threaded rod 5 and is located inside the motor mounting seat 4.

[0044] The guiding mechanism includes a pair of parallel slide rails 9 disposed on the frame 1, and sliders 10 slidably disposed on the slide rails 9 and capable of sliding along the length direction of the slide rails 9. The mounting seat 2 is mounted on the sliders 10 and can move synchronously with the sliders 10.

[0045] In the third embodiment, the two slide rails 9 are parallelly installed on the frame 1 and are parallel to the axial direction of the threaded rod 5. Each slide rail 9 is slidably installed with a slider 10 that slides along the length direction of the slide rail 9. The mounting seat 2 is installed between the two slide rails 9 and the side surface of the mounting seat 2 is connected to all the sliders 10, so that the mounting seat 2 can move synchronously with the sliders 10. During use, the servo motor 7 drives the threaded rod 5 to rotate through the coupling 8, so that the threaded block 6 moves along the axis of the threaded rod 5 as the threaded rod 5 rotates. Then the threaded block 6 pushes the mounting seat 2 and the sliders 10 to slide on the slide rails 9. The cooperation of the slide rails 9 and the sliders 10 can effectively reduce the friction generated when the mounting seat 2 moves, facilitating the precise adjustment of the height of the mounting seat 2 on the frame 1 for machining the inclined hole of the crankshaft.

[0046] In Embodiment 3, slide rail limit grooves are provided on both sides of the slide rail 9, a sliding groove adapted to the slide rail 9 is provided on the slider 10, and a limit protrusion adapted to the slide rail limit groove is provided on each of the inner walls on both sides of the sliding groove; the limit protrusion slides within the slide rail limit groove, thereby preventing the slider 10 from separating from the slide rail 9 during the sliding process.

[0047] Embodiment 4.

[0048] As Figure 1-10 shown, a height adjustment device for machining a crankshaft inclined hole provided by the present utility model includes a frame 1, a mounting seat 2 slidably disposed on the frame 1, a counterweight mechanism slidably disposed on the frame 1 and connected to the mounting seat 2, and a driving mechanism disposed on the frame 1 for driving the mounting seat 2 to slide.

[0049] The driving mechanism includes a guiding mechanism disposed on the frame 1 and connected to the mounting seat 2, a bearing seat 3 and a motor mounting seat 4 disposed on the frame 1, a threaded rod 5 rotatably disposed between the bearing seat 3 and the motor mounting seat 4, a threaded block 6 threadedly connected to the threaded rod 5 and connected to the mounting seat 2, and a servo motor 7 disposed on the motor mounting seat 4 and connected to the threaded rod 5; a coupling 8 is disposed between the servo motor 7 and the threaded rod 5 and is located within the motor mounting seat 4.

[0050] The guiding mechanism includes a pair of slide rails 9 disposed in parallel on the frame 1, and a slider 10 slidably disposed on the slide rails 9 and capable of sliding along the length direction of the slide rails 9, and the mounting seat 2 is mounted on the slider 10 and can move synchronously with the slider 10.

[0051] A limit groove 11 adapted to the slider 10 is provided on the mounting seat 2, and the slider 10 is located within the limit groove 11.

[0052] In Embodiment 4, the limit groove 11 can facilitate the installation of the slider 10, thereby preventing the slider 10 and the mounting seat 2 from shifting during connection.

[0053] Embodiment 5.

[0054] As Figure 1-10 shown, a height adjustment device for machining a crankshaft inclined hole provided by the present utility model includes a frame 1, a mounting seat 2 slidably disposed on the frame 1, a counterweight mechanism slidably disposed on the frame 1 and connected to the mounting seat 2, and a driving mechanism disposed on the frame 1 for driving the mounting seat 2 to slide.

[0055] The driving mechanism includes a guiding mechanism disposed on the frame 1 and connected to the mounting seat 2, a bearing seat 3 and a motor mounting seat 4 disposed on the frame 1, a threaded rod 5 rotatably disposed between the bearing seat 3 and the motor mounting seat 4, a threaded block 6 threadedly connected to the threaded rod 5 and connected to the mounting seat 2, and a servo motor 7 disposed on the motor mounting seat 4 and connected to the threaded rod 5; a coupling 8 is disposed between the servo motor 7 and the threaded rod 5 and is located within the motor mounting seat 4.

[0056] A relief groove 12 adapted to the bearing seat 3 and a mounting hole 13 communicating with the relief groove 12 are formed in the mounting seat 2; the threaded block 6 is located within the mounting hole 13 and is fixedly connected to the mounting seat 2 by bolts.

[0057] In this Embodiment 5, the bearing seat 3 is located within the relief groove 12, and when the mounting seat 2 moves along with the threaded block 6, the relief groove 12 can make way for the bearing seat 3, thereby preventing interference between the bearing seats 3.

[0058] In this Embodiment 5, a mounting hole 13 communicating with the relief groove 12 is formed in the mounting seat 2. The mounting hole 13 facilitates the installation of the threaded block 6. At the same time, the threaded block 6 is connected to the mounting seat 2 by bolts. Specifically, a number of bolt holes adapted to the bolts are provided on both the threaded block 6 and the mounting seat 2, and the bolt holes on the threaded block 6 and the mounting seat 2 correspond one by one. The bolts are threadedly connected into the two threaded holes, thereby preventing the threaded block 6 from rotating along with the threaded rod 5.

[0059] Embodiment 6.

[0060] As Figure 1-10 shown, a height adjustment device for crankshaft inclined hole machining provided by the present utility model includes a frame 1, a mounting seat 2 slidably disposed on the frame 1, a counterweight mechanism slidably disposed on the frame 1 and connected to the mounting seat 2, and a driving mechanism disposed on the frame 1 for driving the mounting seat 2 to slide.

[0061] The driving mechanism includes a guiding mechanism disposed on the frame 1 and connected to the mounting seat 2, a bearing seat 3 and a motor mounting seat 4 disposed on the frame 1, a threaded rod 5 rotatably disposed between the bearing seat 3 and the motor mounting seat 4, a threaded block 6 threadedly connected to the threaded rod 5 and connected to the mounting seat 2, and a servo motor 7 disposed on the motor mounting seat 4 and connected to the threaded rod 5; a coupling 8 is disposed between the servo motor 7 and the threaded rod 5 and is located within the motor mounting seat 4.

[0062] A through connection mounting groove 14 is provided on the motor mounting seat 4. The coupling 8 is located within the connection mounting groove 14. A bearing 15 is respectively provided within the connection mounting groove 14 and the bearing seat 3. Both ends of the threaded rod 5 are respectively mounted within a bearing 15.

[0063] In Embodiment 6, a through connection and installation groove 14 is provided on the motor mounting base 4. A bearing 15 is provided in each of the connection and installation groove 14 and the bearing housing 3. The threaded rod 5 is installed between the two bearings 15, and one end of the threaded rod 5 extends into the connection and installation groove 14. The coupling 8 is located in the connection and installation groove 14. At the same time, the servo motor 7 is installed on the motor mounting base 4, and the output end of the servo motor 7 is located in the connection and installation groove 14, so that the output end of the servo motor 7 is connected to the coupling 8, facilitating the servo motor 7 to drive the threaded rod 5 to rotate through the coupling 8.

[0064] In Embodiment 6, the bearing 15 is installed in the connection and installation groove 14 and fixed in the connection and installation groove 14 through a fixing plate. The fixing plate is fixed to the end face of the motor mounting base 4 by bolts. A plurality of threaded holes A are provided on the fixing plate, and threaded holes B corresponding to the threaded holes A one by one are provided on the end face of the motor mounting base 4. The bolts are threadedly connected in the threaded holes A and the threaded holes B.

[0065] Embodiment 7.

[0066] As Figure 1-10 shown, a height adjustment device for machining crankshaft inclined holes provided by the present utility model includes a frame 1, a mounting base 2 slidably arranged on the frame 1, a counterweight mechanism slidably arranged on the frame 1 and connected to the mounting base 2, and a driving mechanism arranged on the frame 1 for driving the mounting base 2 to slide.

[0067] The counterweight mechanism includes two groups of connection mechanisms arranged at the top of the frame 1 and connected to the mounting base 2, and a counterweight block 18 slidably arranged in the frame 1 and connected to the connection mechanism.

[0068] In Embodiment 7, two groups of connection mechanisms are provided, and the two connection mechanisms are respectively located on both sides of the motor mounting base 4. The counterweight block 18 is slidably installed in the frame 1 and connected to the two connection mechanisms. When the mounting base 2 moves on the frame 1, the mounting base 2 pulls the counterweight block 18 to slide in the frame 1 through the connection mechanism, thereby adjusting the center of gravity position of the mounting base 2 by the counterweight block 18.

[0069] Embodiment 8.

[0070] As Figure 1-10 shown, a height adjustment device for machining crankshaft inclined holes provided by the present utility model includes a frame 1, a mounting base 2 slidably arranged on the frame 1, a counterweight mechanism slidably arranged on the frame 1 and connected to the mounting base 2, and a driving mechanism arranged on the frame 1 for driving the mounting base 2 to slide.

[0071] The counterweight mechanism includes two groups of connection mechanisms arranged at the top of the frame 1 and connected to the mounting base 2, and a counterweight block 18 slidably arranged in the frame 1 and connected to the connection mechanism.

[0072] The connecting mechanism includes a lifting lug A21 provided on the mounting seat 2, a mounting rod 16 provided on the top of the frame 1, a pair of pulleys 17 rotatably provided on the mounting rod 16, a lifting lug B22 provided on the counterweight 18, and a pulling rope 19 with one end connected to the lifting lug A21 and the other end sequentially passing through the two pulleys 17 and connected to the lifting lug B22.

[0073] In the eighth embodiment, one end of the pulling rope 19 is connected to the pulling rope 19 and the other end passes through the two pulleys 17 and is connected to the lifting lug B22. During use, as the mounting seat 2 rises on the frame 1, the mounting seat 2 pulls the counterweight 18 to rise inside the frame 1 through the pulling rope 19, so that the counterweight 18 can be kept stable by the counterweight 18. At the same time, the two pulleys 17 in the mounting rod 16 can reduce the friction of the pulling rope 19 when the pulling rope 19 moves, thereby increasing the service life of the pulling rope 19.

[0074] Embodiment 9.

[0075] As Figure 1-10 shown, a height adjustment device for machining the inclined hole of a crankshaft provided by the present utility model includes a frame 1, a mounting seat 2 slidably provided on the frame 1, a counterweight mechanism slidably provided on the frame 1 and connected to the mounting seat 2, and a driving mechanism provided on the frame 1 for driving the mounting seat 2 to slide.

[0076] The counterweight mechanism includes two groups of connecting mechanisms provided on the top of the frame 1 and connected to the mounting seat 2, and a counterweight 18 slidably provided inside the frame 1 and connected to the connecting mechanism.

[0077] The connecting mechanism includes a lifting lug A21 provided on the mounting seat 2, a mounting rod 16 provided on the top of the frame 1, a pair of pulleys 17 rotatably provided on the mounting rod 16, a lifting lug B22 provided on the counterweight 18, and a pulling rope 19 with one end connected to the lifting lug A21 and the other end sequentially passing through the two pulleys 17 and connected to the lifting lug B22.

[0078] The mounting rod 16 is provided with a pulley mounting groove 23 adapted to the pulley 17, and the pulley 17 is rotatably mounted in the pulley mounting groove 23.

[0079] In the ninth embodiment, the pulley mounting groove 23 can facilitate the installation of the pulley 17.

[0080] Embodiment 10.

[0081] As Figure 1-10 shown, a height adjustment device for machining the inclined hole of a crankshaft provided by the present utility model includes a frame 1, a mounting seat 2 slidably provided on the frame 1, a counterweight mechanism slidably provided on the frame 1 and connected to the mounting seat 2, and a driving mechanism provided on the frame 1 for driving the mounting seat 2 to slide.

[0082] The counterweight mechanism includes two sets of connecting mechanisms disposed on the top of the frame 1 and connected to the mounting seat 2, and a counterweight block 18 slidably disposed in the frame 1 and connected to the connecting mechanism.

[0083] A counterweight installation groove 20 adapted to the counterweight block 18 is provided in the frame 1, and the counterweight block 18 is slidably installed in the counterweight installation groove 20.

[0084] In this embodiment 10, the counterweight installation groove 20 can install the counterweight block 18 and at the same time guide it when the counterweight block 18 moves, so as to facilitate the counterweight block 18 to pull the mounting seat 2.

[0085] The servo motor 77 used in the present utility model is a prior art and can be directly purchased and used in the market. Therefore, the structure, circuit and principle of the servo motor 77 will not be elaborated herein.

[0086] Finally, it should be noted that: the above embodiments are only relatively preferred embodiments of the present utility model to illustrate the technical solutions of the present utility model, rather than limiting it, and certainly not limiting the patent scope of the present utility model; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present utility model; that is to say, any meaningless changes or refinements made in the main design concept and spirit of the present utility model, as long as the technical problems solved are still the same as those of the present utility model, should be included in the protection scope of the present utility model; in addition, directly or indirectly applying the technical solutions of the present utility model to other related technical fields shall similarly be included in the patent protection scope of the present utility model.

Claims

1. A height adjustment device for crankshaft inclined hole processing, characterized in that: The invention comprises a frame (1), a mounting seat (2) slidably arranged on the frame (1), a counterweight mechanism slidably arranged on the frame (1) and connected to the mounting seat (2), and a driving mechanism arranged on the frame (1) and used for driving the mounting seat (2) to slide.

2. A height adjustment device for crankshaft inclined hole machining according to claim 1, characterized in that: The driving mechanism comprises a guide mechanism arranged on a frame (1) and connected to a mounting seat (2), a bearing seat (3) and a motor mounting seat (4) arranged on the frame (1), a threaded rod (5) rotatably arranged between the bearing seat (3) and the motor mounting seat (4), a threaded block (6) threadedly connected to the threaded rod (5) and connected to the mounting seat (2), and a servo motor (7) arranged on the motor mounting seat (4) and connected to the threaded rod (5); a coupling (8) located in the motor mounting seat (4) is arranged between the servo motor (7) and the threaded rod (5).

3. A height adjustment device for crankshaft inclined hole machining according to claim 2, characterized in that: The guide mechanism comprises a pair of slide rails (9) arranged in parallel on the frame (1), and a slider (10) slidably arranged on the slide rails (9) and capable of sliding along the length direction of the slide rails (9); the mounting seat (2) is mounted on the slider (10) and can move synchronously with the slider (10).

4. A height adjustment device for crankshaft inclined hole machining according to claim 3, characterized in that: A limiting groove (11) matched with the sliding block (10) is provided on the mounting seat (2), and the sliding block (10) is installed in the limiting groove (11).

5. The height adjustment device for crankshaft inclined hole machining according to claim 2, characterized in that: The mounting seat (2) is provided with a clearance groove (12) matched with the bearing seat (3), and a mounting hole (13) connected with the clearance groove (12); the threaded block (6) is located in the mounting hole (13) and is fixedly connected to the mounting seat (2) by bolts.

6. A height adjustment device for crankshaft inclined hole machining according to claim 2, characterized in that: The motor mounting seat (4) is provided with a connecting installation groove (14) extending therethrough, the coupling (8) is located in the connecting installation groove (14), a bearing (15) is respectively provided in the connecting installation groove (14) and the bearing seat (3), and both ends of the threaded rod (5) are respectively installed in a bearing (15).

7. A height adjustment device for crankshaft inclined hole machining according to claim 1, characterized in that: The counterweight mechanism comprises two groups of connecting mechanisms arranged on the top of the frame (1) and connected to the mounting seat (2), and a counterweight block (18) slidably arranged in the frame (1) and connected to the connecting mechanisms.

8. A height adjustment device for crankshaft inclined hole machining according to claim 7, characterized in that: The connection mechanism comprises a lifting lug A (21) arranged on a mounting seat (2), a mounting rod (16) arranged on the top of a frame (1), a pair of pulleys (17) rotatably arranged on the mounting rod (16), a lifting lug B (22) arranged on a counterweight (18), and a pull rope (19) having one end connected to the lifting lug A (21) and the other end passing through two pulleys (17) in sequence and connected to the lifting lug B (22).

9. A height adjustment device for crankshaft inclined hole machining according to claim 8, characterized in that: The mounting rod (16) is provided with a pulley mounting groove (23) adapted to the pulley (17), and the pulley (17) is rotatably mounted in the pulley mounting groove (23).

10. A height adjustment device for crankshaft inclined hole machining according to claim 7, characterized in that: A counterweight installation groove (20) adapted to the counterweight block (18) is arranged in the frame (1), and the counterweight block (18) is slidably installed in the counterweight installation groove (20).

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