Positioning device for spline shaft of power tool apron

Abstract

The utility model provides a power tool apron spline shaft positioning device which comprises a tool apron body, an input shaft and an output shaft are installed in the tool apron body, a connector handle is arranged on one side of the tool apron body, a shaft hole is formed in the connector handle, and a positioning groove is formed in the edge of the shaft hole in the end, away from the tool apron body, of the connector handle. One end of the spline shaft is connected with the input shaft, the spline shaft is sleeved with a spring, the end, provided with a key groove, of the spline shaft extends out of the shaft hole, the key groove of the spline shaft is slidably sleeved with a positioning ring, an axial key groove is formed in the inner side wall of the positioning ring, the positioning ring is arranged in the shaft hole and extends out of the shaft hole along with the key groove of the spline shaft, and a positioning block is arranged at the position, arranged in the shaft hole, of the positioning ring. During tool changing, the spline shaft sleeve of the tool turret is separated from the spline shaft, meanwhile, the spring pushes the positioning ring to axially move along the key groove of the spline shaft, the positioning block is clamped in the positioning groove of the connector handle, the key groove in the positioning ring is matched with the key groove of the spline shaft to limit rotation of the spline shaft, and the spline shaft sleeve of the tool turret and the spline shaft can be rapidly combined after tool changing is completed. The tool turret and the tool apron are prevented from being damaged, the tool changing time is saved, and the machining efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to a spline shaft positioning device for a power tool seat. Background Art

[0002] The drive shaft is a key component for power transmission in the transmission system, and its performance plays a vital role in the functional realization and reliability of the entire transmission system. In actual engineering applications, it is common to use a spline shaft as the power input shaft of the power tool holder. The spline shaft is driven to rotate by engaging the spline sleeve of the turret with the keyway of the spline shaft. The power tool holder will replace the tool for processing workpieces of different shapes during the processing of the workpiece. Generally, the spline sleeve of the turret needs to be disconnected from the spline shaft when replacing the tool. The spline shaft will rotate during the tool replacement process. After the tool is replaced, when the spline sleeve of the turret is operated again to connect with the spline shaft, the keyway of the spline shaft will not be in the original corresponding position due to the rotation of the spline shaft, resulting in a collision between the spline sleeve of the turret and the spline shaft, thereby damaging the turret and the tool holder, wasting tool change time and reducing processing efficiency. Utility Model Content

[0003] The utility model provides a spline shaft positioning device for a power tool holder, aiming to improve the technical problems mentioned in the above technical background.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a spline shaft positioning device for a power tool holder, comprising a tool holder body, an input shaft and an output shaft are installed in the tool holder body, an interface handle is arranged on one side of the tool holder body, the interface handle is provided with an axial hole, and an end of the interface handle away from the tool holder body is provided with a positioning groove on the edge of the axial hole, a stepped spline shaft is rotatably arranged in the axial hole, one end of the spline shaft is connected to the input shaft, the spline shaft is sleeved with a spring, one end of the spline shaft provided with a keyway extends out of the axial hole, a positioning ring is slidably set at the keyway position of the spline shaft, an axial keyway is arranged on the inner side wall of the positioning ring, the positioning ring is placed in the axial hole and extends out of the axial hole along with the keyway of the spline shaft, and a positioning block is arranged at the position where the positioning ring is placed in the axial hole.

[0005] Furthermore, the positioning block is trapezoidal in shape, the upper bottom width of the positioning block is smaller than the slot width of the positioning slot, and the lower bottom width of the positioning block is larger than the slot width of the positioning slot.

[0006] Furthermore, the spline shaft is stepped, and the diameter of one end of the spline shaft connected to the input shaft is larger than the end where the keyway is set, one end of the spring abuts against the large diameter end, and the other end pushes the positioning ring.

[0007] Further, the length of the keyway of the spline shaft along the axial direction is greater than the length of the positioning ring along the axial direction.

[0008] Furthermore, the input shaft and the output shaft are connected via a bevel gear.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] The utility model discloses a spline shaft positioning device for a power tool holder, which has a simple structure and a reasonable and ingenious design. It comprises a tool holder body, an input shaft and an output shaft are installed in the tool holder body, an interface handle is arranged on one side of the tool holder body, an axial hole is opened on the interface handle, a positioning groove is opened on the edge of the axial hole at one end of the interface handle away from the tool holder body, a stepped spline shaft is rotatably arranged in the axial hole, one end of the spline shaft is connected to the input shaft, a spring is sleeved on the spline shaft, one end of the spline shaft provided with a key groove extends out of the axial hole, a positioning ring is slidably sleeved at the key groove position of the spline shaft, an axial key groove is arranged on the inner side wall of the positioning ring, the positioning ring is placed in the axial hole and extends out of the axial hole along with the key groove of the spline shaft, and a positioning block is arranged at the position where the positioning ring is placed in the axial hole. When changing the tool, the spline sleeve of the turret is disengaged from the spline shaft, and the spring pushes the locating ring to move axially along the keyway of the spline shaft, so that the locating block is stuck in the locating groove of the interface handle, and the keyway inside the locating ring cooperates with the keyway of the spline shaft to limit the rotation of the spline shaft. After the tool change is completed, the spline sleeve of the turret and the spline shaft can be quickly combined without collision, thus avoiding damage to the turret and the tool holder, saving tool change time and improving processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 It is a structural schematic diagram of a spline shaft positioning device for a power tool holder of the utility model;

[0013] Figure 2 It is a cross-sectional view of a spline shaft positioning device for a power tool holder of the utility model;

[0014] Figure 3 The utility model discloses a schematic diagram of a spline shaft structure of a spline shaft positioning device for a power tool holder.

[0015] Main component symbols

[0016] 10. Tool holder body; 101. Input shaft; 102. Output shaft; 103. Interface handle; 1031. Positioning groove;

[0017] 20, spline shaft; 201, spring; 202, locating ring; 2021, locating block. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0019] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0021] Example

[0022] Reference Figure 1-3As shown, the utility model discloses a positioning device for a spline shaft 20 of a power tool seat, including a tool seat body 10, in which an input shaft 101 and an output shaft 102 are installed, an interface handle 103 is arranged on one side of the tool seat body 10, the interface handle 103 is provided with an axial hole, and a positioning groove 1031 is arranged on the edge of the axial hole at one end of the interface handle 103 away from the tool seat body 10, and a stepped spline shaft 20 is rotatably arranged in the axial hole. Specifically, the input shaft 101 and the output shaft 102 are installed in the tool seat body 10 through bearings, and the input shaft 101 and the output shaft 102 are connected through bevel gears, and the input shaft 101 drives the output shaft 102 to rotate.

[0023] Reference Figure 1-3 As shown, one end of the spline shaft 20 is connected to the input shaft 101, and the spline shaft 20 is sleeved with a spring 201. One end of the spline shaft 20 with a keyway extends out of the shaft hole, and the keyway position of the spline shaft 20 can be slidably sleeved with a positioning ring 202. Specifically, the spline shaft 20 is stepped, and the diameter of one end of the spline shaft 20 connected to the input shaft 101 is larger than the end with the keyway. One end of the spring 201 abuts against the large diameter end, and the other end pushes the positioning ring 202. The large diameter end of the spline shaft 20 is fixedly sleeved with the input shaft 101, and the other end is provided with a keyway for sliding cooperation with the spline shaft 20 sleeve of the turret in the axial direction, and the rotation of the spline shaft 20 is realized through the keyway to realize the input of power. The inner side wall of the positioning ring 202 is provided with an axial keyway, and the positioning ring 202 is placed in the shaft hole and extends out of the shaft hole with the keyway of the spline shaft 20. A positioning block 2021 is set at the position where the positioning ring 202 is placed in the shaft hole. Specifically, under normal conditions, the spring 201 pushes the positioning ring 202 to move along the axial direction of the spline shaft 20, and pushes the positioning ring 202 to move toward the end away from the tool holder body. At this time, the positioning block 2021 on the positioning ring 202 is stuck in the positioning groove 1031 at the edge of the axial hole of the interface handle 103, and the keyway inside the positioning ring 202 is engaged with the keyway of the spline shaft 20; when the spline shaft 20 sleeve of the turret is inserted into the axial hole along the keyway of the spline shaft 20, the positioning ring 202 is pushed to move along the keyway of the spline shaft 20 and compress the spring 201, the positioning block 2021 leaves the positioning groove 1031, and the spline shaft 20 sleeve drives the spline shaft 20 to rotate, and then drives the input shaft 101 and the output shaft 102 to rotate. When changing the tool, the positioning ring 202 rotates until the positioning block 2021 and the positioning groove 1031 are in the same line, controlling the spline shaft 20 sleeve of the turret to withdraw from the shaft hole, and the spline shaft 20 sleeve of the turret and the keyway of the spline shaft 20 are disengaged. The spring 201 pushes the positioning ring 202 to move along the keyway of the spline shaft 20 toward the side of the shaft hole, so that the positioning block 2021 is stuck in the positioning groove 1031, so that the spline shaft 20 cannot rotate. When the tool is replaced, the spline shaft 20 sleeve of the turret is inserted into the keyway of the spline shaft 20 at the position when it was previously withdrawn. There will be no collision between the two due to the deflection of the keyway of the spline shaft 20, thereby avoiding damage to the turret and the tool holder, saving tool changing time, and improving processing efficiency.

[0024] Reference Figure 1-3 As shown, the positioning block 2021 is trapezoidal, the upper bottom width of the positioning block 2021 is smaller than the slot width of the positioning slot 1031, and the lower bottom width of the positioning block 2021 is larger than the slot width of the positioning slot 1031. When the spring 201 pushes the positioning block 2021 to move toward the positioning slot 1031, it can be quickly inserted into the positioning slot 1031 to achieve precise positioning. Furthermore, the length of the keyway of the spline shaft 20 along the axial direction is greater than the length of the positioning ring 202 along the axial direction, so as to prevent the positioning ring 202 from being separated from the keyway of the spline shaft 20 and provide the positioning ring 202 with sufficient moving distance.

[0025] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A spline shaft positioning device for a power tool holder, characterized in that; It includes a tool holder body, in which an input shaft and an output shaft are installed, an interface handle is arranged on one side of the tool holder body, the interface handle is provided with an axial hole, and an end of the interface handle away from the tool holder body is provided with a positioning groove on the edge of the axial hole, a stepped spline shaft is rotatably arranged in the axial hole, one end of the spline shaft is connected to the input shaft, the spline shaft is sleeved with a spring, one end of the spline shaft provided with a keyway extends out of the axial hole, a positioning ring is slidably set at the keyway position of the spline shaft, an axial keyway is arranged on the inner side wall of the positioning ring, the positioning ring is placed in the axial hole and extends out of the axial hole along with the keyway of the spline shaft, and a positioning block is arranged at the position where the positioning ring is placed in the axial hole.

2. The power tool holder spline shaft positioning device according to claim 1, characterized in that: The positioning block is trapezoidal in shape, the upper bottom width of the positioning block is smaller than the slot width of the positioning slot, and the lower bottom width of the positioning block is larger than the slot width of the positioning slot.

3. The power tool holder spline shaft positioning device according to claim 1, characterized in that: The spline shaft is stepped, and the diameter of one end of the spline shaft connected to the input shaft is larger than the end where the keyway is set. One end of the spring abuts against the large diameter end, and the other end pushes the positioning ring.

4. The power tool holder spline shaft positioning device according to claim 1, characterized in that: The length of the keyway of the spline shaft along the axial direction is greater than the length of the positioning ring along the axial direction.

5. The power tool holder spline shaft positioning device according to claim 1, characterized in that: The input shaft and the output shaft are connected through bevel gears.

Images