A main shaft anti-creep positioning and mounting mechanism

Abstract

The utility model relates to a kind of main shaft anti-creep positioning installation mechanism, including mounting seat, main shaft, mounting seat is used to install main shaft, mounting seat is provided with connecting arm, connecting arm is provided with locating bolt, locating bolt passes through connecting arm and is fixedly connected with mounting seat;Main shaft is provided with locating ring, the bottom of locating ring and the top of locating bolt abut;The top of connecting arm is provided with press block, press block is threadedly connected with press bolt, the bottom of press bolt and the top of locating ring abut, by locating bolt passing through connecting arm and mounting seat fixed, its top abuts on the bottom of locating ring on main shaft, provide accurate axial lower limit support for locating ring and main shaft;Meanwhile, the press block of connecting arm top applies pre-tightening force to the top of locating ring by press bolt, and forms two-way clamping from top to bottom with locating bolt, always keep the close adhesion of locating ring and locating bolt, press bolt, to maintain the positioning accuracy of main shaft stably.

Description

Technical Field

[0001] This utility model relates to the field of spindle mounting technology, specifically to a spindle anti-move positioning mounting mechanism. Background Technology

[0002] In machining equipment, the positioning and installation accuracy of the spindle directly affects the operational stability and machining precision of the equipment. In existing spindle mounting mechanisms, to balance lightweight design and ease of machining, the mounting base (including support structures such as clamping arms) is often made of aluminum or aluminum alloy, while the spindle, requiring high strength and wear resistance, is mostly made of iron or iron alloy. Because aluminum's coefficient of thermal expansion is much greater than iron's, the dimensional changes of aluminum mounting bases and iron spindles differ significantly when temperatures change (such as during equipment operation or ambient temperature fluctuations): as the temperature rises, the mounting base expands more significantly, easily forming a gap above the spindle; as the temperature falls, the mounting base contracts more significantly, easily forming a gap below the spindle. This gap caused by thermal expansion and contraction can lead to axial (vertical) movement of the spindle, not only reducing its positioning accuracy but also potentially causing equipment vibration and abnormal noise. Long-term use will exacerbate component wear and may even affect the precision and yield of machined products. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a spindle anti-movement positioning and installation mechanism.

[0004] The objective of this utility model can be achieved through the following technical solution: a spindle anti-slip positioning and mounting mechanism, including a mounting base and a spindle, the mounting base being used to mount the spindle, a connecting arm being provided on the mounting base, a positioning bolt being provided on the connecting arm, the positioning bolt passing through the connecting arm and being fixedly connected to the mounting base; a positioning ring being provided on the spindle, the bottom of the positioning ring abutting against the top of the positioning bolt; a pressure block being provided at the top of the connecting arm, a clamping bolt being threadedly connected to the pressure block, the bottom of the clamping bolt abutting against the top of the positioning ring. Preferably, the mounting base includes a base and two clamping arms, which are disposed opposite to each other on the base, and a mounting hole for mounting the spindle is formed between the two clamping arms.

[0005] Preferably, a stepped hole is provided on one side of the clamping arm, and a threaded hole is provided on the other side of the clamping arm at the position corresponding to the stepped hole. A locking bolt that is threadedly connected to the threaded hole is provided in the stepped hole.

[0006] Preferably, the positioning ring is fixedly connected to the main shaft.

[0007] Preferably, the connecting arm has an L-shaped structure.

[0008] Preferably, the pressure block and the connecting arm are detachably connected.

[0009] Preferably, two connecting arms are provided symmetrically.

[0010] The beneficial effects of this utility model are as follows: the positioning bolt passes through the connecting arm and is fixed to the mounting base, with its top abutting against the bottom of the positioning ring on the spindle, providing precise axial lower limit support for the positioning ring and the spindle, thereby achieving axial positioning of the spindle; at the same time, the pressure block at the top of the connecting arm applies preload to the top of the positioning ring through the clamping bolt, forming a two-way clamping with the positioning bolt, so that the positioning ring is firmly clamped. This two-way constraint structure can always maintain the tight fit between the positioning ring and the positioning bolt and the clamping bolt, thereby stably maintaining the positioning accuracy of the spindle. Attached Figure Description

[0011] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0012] Fig. 1 This is a schematic diagram of the structure of a spindle anti-slip positioning and installation mechanism according to the present invention.

[0013] Fig. 2 This is a schematic diagram of the mounting base of the spindle anti-slip positioning mounting mechanism of this utility model.

[0014] The labels in the diagram represent: 1. Mounting base; 2. Spindle; 3. Connecting arm; 4. Positioning bolt; 5. Positioning ring; 6. Pressure block; 7. Clamping bolt; 8. Base; 9. Clamping arm; 10. Mounting hole; 11. Stepped hole; 12. Threaded hole; 13. Locking bolt. Detailed Implementation

[0015] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0016] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0017] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0018] See Figs. 1-2 As shown, the structure of this utility model is as follows: a spindle anti-slip positioning and mounting mechanism, including a mounting base 1 and a spindle 2. The mounting base 1 is used to mount the spindle 2. A connecting arm 3 is provided on the mounting base 1, and a positioning bolt 4 is provided on the connecting arm 3. The positioning bolt 4 passes through the connecting arm 3 and is fixedly connected to the mounting base 1. A positioning ring 5 is provided on the spindle 2, and the bottom of the positioning ring 5 abuts against the top of the positioning bolt 4. A pressure block 6 is provided on the top of the connecting arm 3, and a clamping bolt 7 is threadedly connected to the pressure block 6. The bottom of the clamping bolt 7 abuts against the top of the positioning ring 5. Specifically, the spindle 2 is mounted on the machine tool through the mounting base 1. One end of the connecting arm 3 is connected to the mounting base 1, and the other end extends to the positioning ring 5 of the spindle 2, integrating the lower support force of the positioning bolt 4 and the upper pressure of the clamping bolt 7 into a cooperative constraint. The positioning bolt 4 passes through the connecting arm 3 and is rigidly fixed to the mounting base 1. Its top end face tightly abuts against the bottom of the positioning ring 5 on the spindle 2. This structure not only fixes the connecting arm 3 to the mounting base 1, but also provides precise axial lower limit support for the positioning ring 5 and the spindle 2, directly restricting the spindle 2's downward movement. The positioning ring 5 on the spindle 2 remains relatively fixed to the spindle 2. Its bottom fits against the top surface of the positioning bolt 4 to form a "lower constraint point," while its top acts as an "upper constraint point" to cooperate with the clamping bolt 7. The clamping block 6 is installed on the top of the connecting arm 3. The clamping bolt 7 on it can be adjusted axially through a threaded connection. After its bottom abuts against the top of the positioning ring 5, a downward preload is applied by tightening, so that the positioning ring 5 is firmly clamped between the positioning bolt 4 and the clamping bolt 7. When the spindle 2 tends to move upward, the pressure of the clamping bolt 7 directly restricts the positioning ring 5 from moving upward; when the spindle 2 tends to move downward, the supporting force of the positioning bolt 4 prevents the positioning ring 5 from moving downward. The two work together to form a closed-loop constraint, ultimately achieving high-precision, non-moving positioning of spindle 2 in the axial direction.

[0019] like Fig. 2As shown, the mounting base 1 includes a base 8 and two clamping arms 9. The two clamping arms 9 are disposed opposite to each other on the base 8, and a mounting hole 10 for mounting the spindle 2 is formed between the two clamping arms 9. Specifically, the mounting base 1 consists of a base 8 and two clamping arms 9. The base 8 provides a stable mounting reference for the clamping arms 9, ensuring the relative positional accuracy of the clamping arms 9. The two clamping arms 9 are disposed opposite to each other on the base 8, and the mounting hole 10 formed between them is used to accommodate the spindle 2, providing radial mounting space for the spindle 2. The clamping arms 9, through their fixed connection with the base 8, together form a radial support frame for the spindle 2, providing a mounting fulcrum for the connecting arm 3 and limiting the horizontal displacement of the spindle 2 through their own structure.

[0020] like Fig. 2 As shown, a stepped hole 11 is provided on one side of the clamping arm 9, and a threaded hole 12 is provided on the other side of the clamping arm 9 at the position corresponding to the stepped hole 11. A locking bolt 13 is provided in the stepped hole 11 and threadedly connected to the threaded hole 12. Specifically, the stepped hole 11 of one side of the clamping arm 9 is used to accommodate the head of the locking bolt 13 to prevent the bolt head from protruding and interfering with other parts; the threaded hole 12 of the other side of the clamping arm 9 cooperates with the locking bolt 13. By tightening the locking bolt 13, the thread pull can be used to drive the two clamping arms 9 to move closer to each other. As the clamping arms 9 move closer, their inner sides come into contact with the outer surface of the spindle 2 and generate clamping force, which restricts the spindle 2 from moving or wobbling in the horizontal direction through radial clamping.

[0021] Furthermore, the positioning ring 5 is fixedly connected to the spindle 2, ensuring that the positioning ring 5 moves synchronously with the spindle 2 and preventing the positioning ring 5 from sliding relative to the spindle 2. This fixed relationship allows the supporting force of the positioning bolt 4 on the positioning ring 5 and the pressure of the clamping bolt 7 on the positioning ring 5 to be directly transmitted to the spindle 2, ensuring that the axial constraint force is effectively applied to the spindle 2, preventing axial constraint failure due to loosening of the positioning ring 5, and improving the reliability of the spindle 2's positioning.

[0022] like Fig. 1 , Fig. 2 As shown, the connecting arm 3 has an L-shaped structure. Its horizontal section can be stably connected to the clamping arm 9, ensuring the connection strength with the clamping arm 9. The vertical section extends upward and is fitted with the pressure block 6, so that the pressure block 6 and the clamping bolt 7 are directly above the positioning ring 5. This structure ensures that the positioning bolt 4 and the clamping bolt 7 are vertically aligned with the positioning ring 5, forming symmetrical upper and lower constraints. Furthermore, the pressure block 6 is detachably connected to the connecting arm 3 by bolts, and its core function is to facilitate the installation of the spindle 2. When installing the spindle 2, the pressure block 6 can be removed from the connecting arm 3 to eliminate the obstruction of the installation path of the spindle 2 by the pressure block 6, avoid spatial interference caused by the position of the pressure block 6, and allow the spindle 2 to be smoothly placed into the installation space of the mounting base 1 and complete the initial positioning; after the spindle 2 is in place, the pressure block 6 is reinstalled on the connecting arm 3, and the axial clamping of the positioning ring 5 is achieved by tightening the clamping bolt 7 on the pressure block 6.

[0023] Two connecting arms 3 are symmetrically arranged, which can make the supporting force of the positioning bolt 4 and the preload of the clamping bolt 7 evenly distributed on both sides of the positioning ring 5, completely avoiding the eccentric torque caused by unilateral force and preventing the spindle from radially wobbling due to force imbalance.

[0024] In practical use, first, fix the mounting base 1 in the preset position of the machine tool, then install the spindle 2 onto the mounting base 1. Then, make one end of the connecting arm 3 fit against the mounting base 1, pass the positioning bolt 4 through the connecting arm 3 and screw it into the mounting base 1 to achieve rigid fixation. Next, install the pressure block 6 on the top of the connecting arm 3 and initially screw the clamping bolt 7 into the threaded hole 12 of the pressure block 6. During positioning, the bottom of the positioning ring 5 on the spindle 2 naturally fits against the top of the positioning bolt 4 to form an axial lower limit support. Tighten the clamping bolt 7 so that its bottom abuts against the top of the positioning ring 5 and applies a preload force to clamp the positioning ring 5 between the positioning bolt 4 and the clamping bolt 7 to complete the axial positioning. To prevent axial movement, when the spindle 2 has a downward tendency, the positioning bolt 4 provides an upward support force to prevent the positioning ring 5 from moving downward. When the spindle 2 has an upward tendency, the clamping bolt 7 provides a downward pressure to prevent the positioning ring 5 from moving upward. The two work together to form a closed-loop constraint to limit the axial movement of the spindle 2.

[0025] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the substance and scope of the present invention. Various modifications made by those skilled in the art to the above embodiments after reading this specification are all within the scope of protection of the present invention.

Claims

1. A spindle anti-migration positioning and mounting mechanism, characterized in that: The device includes a mounting base (1) and a spindle (2). The mounting base (1) is used to mount the spindle (2). A connecting arm (3) is provided on the mounting base (1). A positioning bolt (4) is provided on the connecting arm (3). The positioning bolt (4) passes through the connecting arm (3) and is fixedly connected to the mounting base (1). A positioning ring (5) is provided on the spindle (2). The bottom of the positioning ring (5) abuts against the top of the positioning bolt (4). A pressure block (6) is provided on the top of the connecting arm (3). A clamping bolt (7) is threadedly connected to the pressure block (6). The bottom of the clamping bolt (7) abuts against the top of the positioning ring (5).

2. The spindle anti-migration positioning and mounting mechanism according to claim 1, characterized in that: The mounting base (1) includes a base (8) and two clamping arms (9), which are disposed opposite to each other on the base (8), and a mounting hole (10) for mounting the spindle (2) is formed between the two clamping arms (9).

3. The spindle anti-migration positioning and mounting mechanism according to claim 2, characterized in that: A stepped hole (11) is provided on one side of the clamping arm (9), and a threaded hole (12) is provided on the other side of the clamping arm (9) corresponding to the stepped hole (11). A locking bolt (13) is provided in the stepped hole (11) and threadedly connected to the threaded hole (12).

4. The spindle anti-migration positioning and mounting mechanism according to claim 1, characterized in that: The positioning ring (5) is fixedly connected to the main shaft (2).

5. The spindle anti-migration positioning and mounting mechanism according to claim 1, characterized in that: The connecting arm (3) has an L-shaped structure.

6. The spindle anti-migration positioning and mounting mechanism according to claim 1, characterized in that: The pressure block (6) is detachably connected to the connecting arm (3).

7. The spindle anti-migration positioning and mounting mechanism according to claim 1, characterized in that: The connecting arm (3) is provided in two symmetrically.

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