Cutting clamp for motor balance block

Abstract

The utility model discloses a cutting clamp for a motor balance block and belongs to the technical field of motor balance block machining. Comprising a static clamping block and a movable clamping block which are oppositely arranged, a jaw with an adjustable distance is formed between the static clamping block and the movable clamping block, and a plurality of balance block blanks are arranged in the jaw side by side. Extrusion heads in one-to-one correspondence with the balance block blanks are arranged on the lower surface of the balance clamping block in a liftable mode, and extrusion bolts used for driving the extrusion heads to act are arranged on the surface of the balance clamping block. According to the cutting clamp for the motor balance block, the balance clamping block is arranged, and the extrusion head at the bottom of the balance clamping block is used for applying downward extrusion force to each balance block green body, so that the clamping force borne by the balance block green bodies is more balanced, and the problem that a large number of burrs exist on the cutting face after cutting is avoided.

Description

Technical Field

[0001] The invention discloses a cutting fixture for a motor balancing block, belonging to the technical field of motor balancing block processing. Background Art

[0002] Motor dynamic balancing is an important means to ensure that the motor can continue to operate reliably. Motor dynamic balancing is generally achieved through balancing blocks. Generally, the balancing blocks need to be installed in the annular groove of the rotor balancing disk of the motor through bolts, and then the position and mass of the balancing blocks are adjusted to make the center of gravity of the motor coincide with the center of rotation axis. Specifically, adjustments can be made by adding or subtracting the number of balancing blocks, adjusting the position of the balancing blocks, etc., until the optimal balancing effect is achieved.

[0003] When processing a balancing block, generally, a long strip of balancing block blank is selected and cut in sequence along the length direction of the balancing block. Before cutting, a threaded hole is first opened on the surface of the balancing block blank according to the length of the balancing block, and then multiple balancing block blanks are clamped together in the jaws of a vise, and then cut by a milling cutter, and multiple balancing blocks can be obtained at the same time with each cutting.

[0004] Several balancing block blanks are placed side by side in the jaws of the bench vise and clamped, and after clamping, the balancing block blanks of a predetermined length are extended out of the jaws. Since the balancing blocks need to be arranged around the circumference of the motor rotor, the cross-section of the balancing blocks is generally fan-shaped or trapezoidal, and when clamping, since the balancing block blanks are only clamped from both sides at this time, there is a non-parallelism error at the clamping surface, and it is difficult to ensure uniform clamping force, so that the balancing block blanks are often difficult to maintain balance during the cutting process, and a large number of burrs will be formed on the cutting surface after cutting. Therefore, after the balancing block is cut, a lot of time needs to be wasted on grinding the balancing block. At the same time, the cutting force of the saw blade often stirs the balancing block blank to move up and break the saw teeth.

[0005] The Chinese utility model patent with application number 201721005722.1 and application date of August 12, 2017, and patent name "A cutting fixture" discloses a technical solution, in which a pressure baffle is arranged above the object to be cut to apply a top-down pressure to the object to be cut. However, for the balancing block blank, since its cross section is fan-shaped or trapezoidal, after being placed in the clamp, its upward surface is an inclined surface, so it is still difficult to ensure that all the balancing block blanks are balanced by the flat plate-like components.

[0006] Therefore, designing a technical solution to balance the clamping force when the balance block is clamped to reduce burrs after cutting and avoid damage to the sawtooth blade has become an urgent problem to be solved in the field. Utility Model Content

[0007] The technical problem to be solved by the utility model is: to overcome the shortcomings of the prior art and provide a cutting fixture for motor balancing blocks by setting a balancing clamp and utilizing an extrusion head at the bottom of the balancing clamp to apply a downward extrusion force to each balancing block blank, so that the clamping force exerted on the balancing block blank is more balanced, thereby avoiding the problem of a large number of burrs on the cut surface after cutting.

[0008] The technical solution adopted by the utility model to solve the technical problem is: the cutting fixture of the motor balancing block includes a relatively arranged static clamping block and a movable clamping block, a jaw with adjustable spacing is formed between the static clamping block and the movable clamping block, and a plurality of balancing block blanks are placed side by side in the jaw, which is characterized in that: a balancing clamping block is arranged on the upper part of the jaw, an extrusion head corresponding to the balancing block blank is arranged on the lower surface of the balancing clamping block and can be raised and lowered, and an extrusion bolt for driving the extrusion head to move is arranged on the surface of the balancing clamping block.

[0009] Preferably, two ends of the balancing clamp are respectively fixed to the surface of the stationary clamp and the surface of the movable clamp by a first fixing bolt and a second fixing bolt.

[0010] Preferably, the interior of the balancing clamp is a cavity, and the interior of the balancing clamp is filled with extruded steel balls; extrusion holes corresponding to the balancing block blanks are opened at the bottom of the balancing clamp, and the extrusion heads are placed in the corresponding extrusion holes in sequence.

[0011] Preferably, a threaded hole is provided on the side of the balancing clamp, and the extrusion bolt is threadedly installed in the threaded hole.

[0012] Preferably, a cushion block is provided at the bottom of the jaw, jaw cushion blocks are provided on both sides of the cushion block, and a positioning mechanism is also provided at the jaw.

[0013] Preferably, the positioning mechanism includes positioning holes formed in the movable clamping block and the jaw pad, and the positioning rod passes through all the positioning holes and the balancing block blank at the same time.

[0014] Preferably, a base is provided, a stationary clamping block is vertically fixed to one end of the upper surface of the base, a movable clamping block is movably mounted on the surface of the base, and a clamping bolt for driving the movable clamping block to move is provided at the bottom of the base.

[0015] Preferably, a cutting groove is provided on the front side of the jaws.

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

[0017] In the cutting fixture of the motor balance block, a balance clamp is set up, and a downward extrusion force is applied to each balance block blank by utilizing the extrusion head at the bottom of the balance clamp. The extrusion force on both sides is coordinated to make the clamping force on the balance block blank more balanced, thereby avoiding the generation of a large number of burrs on the cutting surface after cutting due to unbalanced balance force, and at the same time avoiding the problem of saw teeth breaking due to the cutting force of the saw blade moving the balance block blank upward during cutting.

[0018] In the cutting fixture of the motor balancing block, a positioning mechanism is provided to simultaneously position all the balancing block flat blanks, thereby ensuring cutting accuracy.

[0019] In the cutting fixture of the motor balancing block, a fixing opening is provided at the second fixing platform on the side of the balancing clamp block, so that a certain adjustment margin can be reserved when installing the second fixing bolt. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Top view of the cutting fixture for the motor balancing block.

[0021] Figure 2 for Figure 1 The partial cross-sectional view along AA direction behind the saw blade is omitted.

[0022] Figure 3 for Figure 1 The partial cross-sectional view along the BB direction after the saw blade is omitted.

[0023] Wherein: 1, saw blade 2, stationary clamping block 3, jaw pad 4, first fixed platform 5, jaw 6, balancing block blank 7, balancing clamping block 8, cutting groove 9, base 10, second fixing bolt 11, extrusion bolt 12, positioning rod 13, clamping bolt 14, second fixed platform 15, movable clamping block 16, first fixing bolt 17, extrusion steel ball 18, extrusion head 19, pad. DETAILED DESCRIPTION

[0024] Figures 1 to 3 It is the best embodiment of the utility model, and the following Figures 1 to 3 The utility model is further described.

[0025] like Figure 1 As shown, a cutting fixture for a motor balancing block includes a base 9, fixing plates are horizontally arranged on both sides of the base 9, fixing holes are respectively arranged at the front and rear ends of the fixing plates on both sides, and a fixing bolt is installed in each fixing hole. The base 9 is fixed to the surface of a workbench (not shown in the figure) by fixing bolts at the four corners of the base 9.

[0026] A stationary clamping block 2 is vertically arranged at one end of the upper surface of the base 9, and a movable clamping block 15 is also arranged on the upper surface of the base 9. A jaw 5 is formed between the stationary clamping block 2 and the movable clamping block 15. A clamping bolt 13 is arranged on the surface of the base 9 close to the movable clamping block 15. The clamping bolt 13 enters from the side of the base 9. The clamping bolt 13 adopts the structure of a common bench vise in the field and is connected to the movable clamping block 15. When the clamping bolt 13 is rotated, the movable clamping block 15 and the stationary clamping block 2 are moved closer or farther away, so that the opening size of the jaw 5 can be adjusted.

[0027] A pad 19 is placed at the bottom of the jaw 5, and a jaw pad 3 is provided on both sides of the pad 19. The jaw pads 3 on both sides are respectively located inside the static clamp 2 and the movable clamp 15. The plurality of balancing block blanks 6 to be cut are placed side by side on the surface of the pad 19 after being aligned at both ends, and are located between the jaw pads 3 on both sides. Positioning holes are provided in the movable clamp 15 and the two jaw pads 3. The positioning holes in the movable clamp 15 and the two jaw pads 3 are of the same size and are on the same straight line. The positioning rod 12 passes through each positioning hole in turn.

[0028] A balancing clamp 7 is arranged above the jaw 5, and the balancing clamp 7 is perpendicular to the balancing block blank 6. A first fixing platform 4 is horizontally led out from the end of the balancing clamp 7, and a fixing hole is provided on the surface of the first fixing platform 4. The first fixing bolt 16 passes downward through the fixing hole of the first fixing platform 4 to fix one end of the balancing clamp 7 to the upper surface of the stationary clamp 2. A second fixing platform 14 is horizontally led out from the side of the other end of the balancing clamp 7, and a fixing opening is provided on the side of the second fixing platform 14. The second fixing bolt 10 passes downward through the fixing opening of the second fixing platform 14 to fix the other end of the balancing clamp 7 to the upper surface of the movable clamp 15. By providing a fixing opening on the side of the second fixing platform 14, it is convenient to retain a certain adjustment margin when installing the second fixing bolt 10.

[0029] Combination Figure 2~3 The interior of the balancing clamp 7 is a hollow structure, and the inner cavity of the balancing clamp 7 is filled with extrusion steel balls 17. Extrusion holes corresponding to the balancing block blanks 6 are provided at the bottom of the balancing clamp 7, and an extrusion head 18 is placed in each extrusion hole. The extrusion head 18 is clamped in the extrusion hole through the boss on the upper part to prevent the extrusion head 18 from falling from the extrusion hole. A threaded hole communicating with the inner cavity of the balancing clamp 7 is provided at the other end, and an extrusion bolt 11 is threadedly installed in the threaded hole.

[0030] The specific working process and working principle are as follows:

[0031] After aligning the two ends of several balancing block blanks 6, place them in the jaws 5, and place all balancing block blanks 6 on the surface of the pad 19, then pass the positioning rod 12 through the positioning holes of the jaw pad 3 and the movable clamping block 15, and at the same time, pass the positioning rod 12 through the threaded holes opened in all balancing block blanks 6 to position all balancing block blanks 6. After positioning, one end of the balancing block blank 6 is led out from the front end of the jaws 5. Turn the clamping bolt 13 to make the movable clamping block 15 close to the static clamping block 2, so that the spacing of the jaws 5 becomes smaller, and all balancing block blanks 6 are clamped from both sides.

[0032] Then, one end of the balancing clamp 7 is fixed to the surface of the stationary clamp 2 by the first fixing bolt 16, and the other end of the balancing clamp 7 is fixed to the surface of the movable clamp 15 by the second fixing bolt 10. Finally, the extrusion bolt 11 is rotated to gradually enter the balancing clamp 7.

[0033] As the extrusion bolts 11 continuously enter the balancing clamp 7, the space inside the balancing clamp 7 is gradually reduced, and the extrusion steel balls 17 are continuously extruded by the extrusion bolts 11, and the gaps between the extrusion steel balls 17 are continuously reduced. The extrusion steel balls 17 further drive the extrusion head 18 to continuously extend to the outside of the balancing clamp 7, so that the extrusion head 18 applies pressure to the inclined surface of the corresponding balancing block blank 6, so that each balancing block blank 6 is respectively in close contact with the cushion block 19.

[0034] The saw blade 1 is started, and moves forward along the cutting groove 8 provided on the surface of the stationary clamp block 2, the jaw pad block 3 and the movable clamp block 15, and cuts each balancing block blank 6 during the moving process, and obtains a plurality of balancing blocks after the sequential cutting is completed. Since the extrusion head 18 at the bottom of the balancing clamp block 7 applies a downward extrusion force to each balancing block blank 6, in combination with the extrusion force on both sides, the clamping force on the balancing block blank 6 is more balanced, thus avoiding the generation of a large number of burrs on the cutting surface after cutting due to the imbalance of the balancing force, and at the same time avoiding the problem of the saw teeth breaking due to the cutting force of the saw blade 1 moving the balancing block blank 6 upward when cutting.

[0035] The above is only the preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model.

Claims

1. A cutting fixture for a motor balancing block, comprising a stationary clamping block (2) and a movable clamping block (15) arranged opposite to each other, a jaw (5) with an adjustable spacing formed between the stationary clamping block (2) and the movable clamping block (15), a plurality of balancing block blanks (6) are arranged side by side in the jaw (5), and characterized in that: A balancing clamp (7) is arranged at the upper part of the jaw (5), an extrusion head (18) corresponding to the balancing block blank (6) is arranged on the lower surface of the balancing clamp (7) in a manner that can be raised and lowered, and an extrusion bolt (11) for driving the extrusion head (18) to move is arranged on the surface of the balancing clamp (7).

2. The cutting fixture for the motor balancing block according to claim 1, characterized in that: The two ends of the balancing clamp block (7) are respectively fixed to the surfaces of the stationary clamp block (2) and the movable clamp block (15) by means of a first fixing bolt (16) and a second fixing bolt (10).

3. The cutting fixture for the motor balancing block according to claim 1 or 2, characterized in that: The interior of the balancing clamp (7) is a hollow cavity, and the interior of the balancing clamp (7) is filled with extrusion steel balls (17); extrusion holes corresponding to the balancing block blanks (6) are opened at the bottom of the balancing clamp (7), and the extrusion heads (18) are sequentially placed in the corresponding extrusion holes.

4. The cutting fixture for the motor balancing block according to claim 3, characterized in that: A threaded hole is provided on the side of the balancing clamp (7), and a squeeze bolt (11) is threadedly installed in the threaded hole.

5. The cutting fixture for the motor balancing block according to claim 1, characterized in that: A cushion block (19) is arranged at the bottom of the jaw (5), jaw cushion blocks (3) are arranged on both sides of the cushion block (19), and a positioning mechanism is also arranged at the jaw (5).

6. The cutting fixture for the motor balancing block according to claim 5, characterized in that: The positioning mechanism comprises positioning holes formed in the movable clamping block (15) and the jaw pad (3), and the positioning rod (12) passes through all the positioning holes and the balancing block blank (6) at the same time.

7. The cutting fixture for the motor balancing block according to claim 1, characterized in that: A base (9) is provided, a stationary clamping block (2) is vertically fixed to one end of the upper surface of the base (9), a movable clamping block (15) is movably mounted on the surface of the base (9), and a clamping bolt (13) for driving the movable clamping block (15) to move is provided at the bottom of the base (9).

8. The cutting fixture for the motor balancing block according to claim 1, characterized in that: A cutting groove (8) is provided on the front side of the jaw (5).

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