Grinding head

Abstract

The utility model discloses a grinding head which comprises an installation sleeve fixed on a machine frame, a driving shaft which slides in the installation sleeve through a driving sleeve and a grinding rod connected to the driving shaft, and the end, away from the grinding rod, of the driving shaft protrudes out of the installation sleeve and is connected with a shaft sleeve in a sliding mode. The shaft sleeve is rotatably connected to the corresponding end of the mounting sleeve through a bearing seat, the driving shaft is rotatably connected to the inner wall of the driving sleeve through a first linear bearing and a second linear bearing, a plurality of driving teeth are arranged on the outer wall of the driving sleeve, and the mounting sleeve is provided with receding holes corresponding to the driving teeth. The deep hole grinding device is simple in structure, the grinding rod can rotate and linearly move simultaneously, and the deep hole grinding device is suitable for grinding deep holes.

Description

Technical Field

[0001] The utility model relates to the technical field of automation equipment, in particular to a grinding head. Background Art

[0002] At present, the most advanced and efficient process for deep hole machining mainly adopts gun drilling or jet drilling, which is completed on a spindle-mounted internal cooling boring machine or a special machine tool. It can complete the machining of holes with generally low precision requirements. For deep hole machining with high precision requirements, the tool cannot meet the dimensional tolerance and form and position tolerance requirements; the inner hole after machining needs to be ground. In the existing technology, the inner hole grinding is usually done by directly placing the product on a rotating seat, the rotating seat rises, and the grinding rod is inserted into the inner hole. When the rotating seat drives the product to rotate, the grinding rod grinds the inner hole, and can only complete the grinding of the center hole of the regular-shaped product. Therefore, improvements are needed. Utility Model Content

[0003] The purpose of the utility model is to provide a grinding head to overcome the deficiencies in the prior art.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] The utility model discloses a grinding head, comprising a mounting sleeve fixed to a frame, a driving shaft sliding in the mounting sleeve through a driving sleeve and a grinding rod connected to the driving shaft, wherein one end of the driving shaft away from the grinding rod protrudes from the mounting sleeve and is slidably connected with a shaft sleeve, the shaft sleeve is rotatably connected to the corresponding end of the mounting sleeve through a bearing seat, the driving shaft is rotatably connected to the inner wall of the driving sleeve through a first linear bearing and a second linear bearing respectively, a plurality of driving teeth are arranged on the outer wall of the driving sleeve, and the mounting sleeve is provided with avoidance holes corresponding to the driving teeth.

[0006] Furthermore, in the above-mentioned grinding head, the driving shaft includes a spline shaft, a first rotating shaft, a connecting shaft, a second rotating shaft and an installation shaft which are arranged in sequence, the sleeve is slidably mounted on the spline shaft, the first linear bearing is mounted on the first rotating shaft, the second linear bearing is mounted on the second rotating shaft, and the grinding rod is connected to the end of the installation shaft.

[0007] Furthermore, in the above-mentioned grinding head, the sleeve is connected to an external power device, and its inner wall is provided with a plurality of keyways corresponding to the spline shaft.

[0008] Furthermore, in the above-mentioned grinding head, a shift shaft is connected between the connecting shaft and the second rotating shaft, eccentric wheels are respectively arranged on both sides of the shift shaft for rotation through the rotating shaft, the rotating shaft is arranged radially along the shift shaft, and a contact ring corresponding to the eccentric wheel is embedded in the inner wall of the driving sleeve.

[0009] Furthermore, in the above-mentioned grinding head, a step through hole is provided in the contact ring, which are a first step hole and a second step hole, wherein the first step hole is slidably sleeved on the shifting shaft, and the second step hole is slidably sleeved on the second rotating shaft.

[0010] Furthermore, in the above-mentioned grinding head, the first linear bearing is connected to the inner wall of the driving sleeve through a bearing sleeve, and one end of the first rotating shaft close to the spline shaft is elastically abutted against the bearing sleeve through a spring sleeve.

[0011] Furthermore, in the above-mentioned grinding head, a first plane bearing is arranged between the first rotating shaft and the spring sleeve.

[0012] Furthermore, in the above-mentioned grinding head, a locking cover is slidably provided at one end of the driving sleeve close to the grinding rod, and the locking cover is rotatably sleeved on the mounting shaft through a second plane bearing.

[0013] Furthermore, in the above-mentioned grinding head, one end of the locking cover close to the grinding rod protrudes to form a limiting boss.

[0014] Furthermore, in the above-mentioned grinding head, the outer wall of the driving sleeve is connected to a sensing block, and the side wall of the mounting sleeve is provided with a sliding groove corresponding to the sensing block.

[0015] Compared with the prior art, the advantages of the utility model are: the utility model has a simple structure, the grinding rod can rotate and move linearly at the same time, and is suitable for processing at different positions. The driving shaft is provided with a rotating eccentric wheel. When the eccentric wheel rotates, the contact ring drives the eccentric wheel to rotate, so that the driving shaft repeatedly moves along its axial direction, avoiding repeated grinding marks and improving processing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 Shown is a schematic structural diagram of a grinding head in a specific embodiment of the utility model.

[0018] Figure 2 Shown is a schematic structural diagram of a slideway in a specific embodiment of the utility model.

[0019] Figure 3 Shown is a cross-sectional schematic diagram of a grinding head in a specific embodiment of the utility model.

[0020] Figure 4 The following is a schematic diagram of the installation of an eccentric wheel in a specific embodiment of the present invention. Specific Embodiments

[0021] Next, the technical solutions in the embodiments of the present invention will be described in detail with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] In the description of the present invention, 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 invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "connected" 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 directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Refer Figures 1 to 4 As shown, a grinding head includes a mounting sleeve 1 fixed to a machine frame, a driving shaft 3 that slides in the mounting sleeve 1 through a driving sleeve 2, and a grinding rod 4 connected to the driving shaft 3. One end of the driving shaft 3 away from the grinding rod 4 protrudes from the mounting sleeve 1 and is slidably connected to a bushing 5. The bushing 5 is rotatably connected to the corresponding end of the mounting sleeve 1 through a bearing seat 6. The driving shaft 3 is respectively rotatably connected to the inner wall of the driving sleeve 2 through a first linear bearing 7 and a second linear bearing 8. A plurality of driving teeth 21 are provided on the outer wall of the driving sleeve 2, and the mounting sleeve 1 is provided with avoidance holes 11 corresponding to the driving teeth 21.

[0025] In this technical solution, the bearing housing is mounted on the frame by bolts or the like. The mounting sleeve is vertically arranged, and its top end is fixed to the bearing housing by means of threaded connection or interference fit. The bearing housing has a conventional structure, and a bearing group is arranged in its stepped hole through a bearing end cover or the like. Spacer rings are arranged at equal intervals between the bearings of the bearing group. The shaft sleeve is rotatably connected to the mounting sleeve through the bearing housing. The shaft sleeve is axially fixed to the bearing housing by a boss protruding from its outer wall and a conventional nut (not shown). The shaft sleeve is connected to an external rotating motor through a synchronous belt or the like to drive the drive shaft to rotate, thereby driving the grinding rod to rotate. The drive sleeve is slidably connected in the mounting sleeve, and drive teeth are machined on its outer wall and distributed along its axial direction. The drive sleeve is connected to an external gear shaft to drive the drive sleeve to move up and down, that is, to drive the drive shaft and the grinding rod to move axially. The grinding rod is mounted on the corresponding end of the drive shaft through a conventional chuck or the like. During its rotation and axial movement, the grinding and lapping processing of the hole is completed. This grinding head has a simple structure, and the grinding rod can rotate and move linearly at the same time, which is suitable for processing at different positions.

[0026] Exemplarily, referring Figures 1 to 4 As shown, the drive shaft 3 includes a spline shaft 31, a first rotating shaft 32, a connecting shaft 33, a second rotating shaft 34, and a mounting shaft 35 arranged in sequence. The shaft sleeve 5 is slidably sleeved on the spline shaft 31, the first linear bearing 7 is sleeved on the first rotating shaft 32, the second linear bearing 8 is sleeved on the second rotating shaft 34, and the grinding rod 4 is connected to the end of the mounting shaft 35.

[0027] In this technical solution, the drive shaft is integrally formed by machining from the same bar, ensuring the coaxiality between the spline shaft, the first rotating shaft, the connecting shaft, the second rotating shaft, and the mounting shaft.

[0028] Exemplarily, referring Figures 1 to 3 As shown, the shaft sleeve 5 is connected to an external power device, and a number of key grooves corresponding to the spline shaft 31 are provided on its inner wall.

[0029] In this technical solution, a synchronous pulley (not shown) is sleeved on the top end of the shaft sleeve and is connected to an external rotating motor or the like through a synchronous belt to drive the shaft sleeve to rotate. A number of key grooves corresponding to the spline shaft are provided on the inner wall of the shaft sleeve. Through the cooperation of the spline shaft and the key grooves, the circumferential fixation between the drive shaft and the shaft sleeve is achieved, so that the shaft sleeve drives the drive shaft to rotate, that is, drives the grinding rod to rotate, and at the same time, it does not interfere with the axial sliding of the drive shaft, that is, the drive sleeve drives the drive shaft to slide.

[0030] Exemplarily, referring Figure 3 and Figure 4 As shown, a toggle shaft 36 is connected between the connecting shaft 33 and the second rotating shaft 34. Eccentric wheels 9 are respectively rotatably arranged on both sides of the toggle shaft 36 through rotating shafts. The rotating shafts are arranged along the radial direction of the toggle shaft. A contact ring 10 corresponding to the eccentric wheel 9 is embedded in the inner wall of the drive sleeve 2.

[0031] In this technical solution, the rotating shaft passes through the toggle shaft along the radial direction of the toggle shaft, and is respectively connected to rotatable eccentric wheels at both ends. A contact ring is embedded in the inner wall of the driving sleeve, and the eccentric wheel rolls against the top surface of the contact ring. During the rotation of the driving shaft, the eccentric wheel rotates, thereby driving the driving shaft to repeatedly move along its axial direction relative to the contact ring, so that the grinding rod completes the corresponding axial processing, avoids repeated grinding marks, and improves processing accuracy.

[0032] For example, Figure 3 and Figure 4 As shown, the contact ring 10 is provided with a stepped through hole, which are a first stepped hole and a second stepped hole. The first stepped hole is slidably sleeved on the shifting shaft 36 , and the second stepped hole is slidably sleeved on the second rotating shaft 34 .

[0033] In this technical solution, the stepped through hole is provided to avoid axial relative sliding between the interference contact ring and the drive shaft. The bottom end of the contact ring abuts against the top end of the second linear bearing, and the bottom end of the second linear bearing is axially fixed to the inner wall of the drive sleeve by a conventional retaining spring.

[0034] For example, Figure 3 As shown, the first linear bearing 7 is connected to the inner wall of the driving sleeve 2 through the bearing sleeve 20 , and one end of the first rotating shaft 32 close to the spline shaft 31 is elastically abutted against the bearing sleeve through the spring sleeve 30 .

[0035] In this technical solution, the two ends of the bearing sleeve are axially fixed to the inner wall of the driving sleeve by conventional structures such as the step surface and the retaining spring of the inner wall of the driving sleeve, and the two ends of the first linear bearing are axially fixed to the inner wall of the bearing sleeve by conventional structures such as the step surface and the retaining spring of the inner wall of the bearing sleeve. The shoulder end face of the first rotating shaft is elastically abutted against the bearing sleeve through a spring sleeve. The spring sleeve is a conventional elastic structure, which exerts an axial force on the driving shaft to ensure that the eccentric wheel is always abutted against the contact ring, thereby driving the driving shaft to repeatedly move along its axial direction.

[0036] For example, Figure 3 As shown, a first plane bearing 40 is disposed between the first rotating shaft 32 and the spring sleeve 30 .

[0037] In this technical solution, both ends of the spring sleeve are rotatably abutted against the drive shaft through the bearing sleeve and the first plane bearing, that is, the spring sleeve does not rotate with the drive shaft, thereby avoiding failure caused by torsion.

[0038] For example, Figures 1 to 3 As shown, a locking cover 50 is slidably provided at one end of the driving sleeve 2 close to the grinding rod 4 , and the locking cover 50 is rotatably sleeved on the mounting shaft 35 through a second plane bearing 60 .

[0039] In this technical solution, the locking cover blocks the bottom end of the driving sleeve to prevent debris from entering the interior of the driving sleeve.

[0040] Exemplarily, refer to Figures 1 to 3 As shown, one end of the lock cover close to the grinding rod 4 protrudes with a limiting boss.

[0041] In this technical solution, the limiting boss restricts the sliding stroke of the lock cover.

[0042] Exemplarily, refer to Figure 1 and Figure 2 As shown, an induction block 70 is connected to the outer wall of the driving sleeve 2, and a sliding groove corresponding to the induction block is provided on the side wall of the mounting sleeve 1.

[0043] In this technical solution, the induction block cooperates with external conventional limit sensors, etc. to limit the maximum stroke of the driving sleeve and avoid collisions, etc.

[0044] In summary, the structure of the present utility model is simple. The grinding rod can rotate and move linearly at the same time, and is suitable for processing at different positions. By setting a rotating eccentric wheel on the driving shaft, when it rotates, the contact ring drives the eccentric wheel to rotate, so that the driving shaft reciprocates axially, avoiding repeated grinding marks and improving the processing accuracy.

[0045] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0046] The above are only specific embodiments of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and retouches can be made, and these improvements and retouches should also be regarded as the protection scope of the present utility model.

Claims

1. A grinding head, characterized in that, It includes a mounting sleeve fixed to a frame, a driving shaft sliding in the mounting sleeve through a driving sleeve, and a grinding rod connected to the driving shaft, wherein one end of the driving shaft away from the grinding rod protrudes from the mounting sleeve and is slidably connected with a shaft sleeve, the shaft sleeve is rotatably connected to the corresponding end of the mounting sleeve through a bearing seat, the driving shaft is rotatably connected to the inner wall of the driving sleeve through a first linear bearing and a second linear bearing respectively, a plurality of driving teeth are arranged on the outer wall of the driving sleeve, and the mounting sleeve is provided with avoidance holes corresponding to the driving teeth.

2. The grinding head according to claim 1, wherein: The driving shaft includes a spline shaft, a first rotating shaft, a connecting shaft, a second rotating shaft and an installation shaft which are arranged in sequence. The sleeve is slidably mounted on the spline shaft, the first linear bearing is mounted on the first rotating shaft, the second linear bearing is mounted on the second rotating shaft, and the grinding rod is connected to the end of the installation shaft.

3. The grinding head according to claim 2, characterized in that: The shaft sleeve is connected to an external power device, and its inner wall is provided with a plurality of key grooves corresponding to the spline shaft.

4. The grinding head according to claim 2, wherein: A toggle shaft is connected between the connecting shaft and the second rotating shaft, and eccentric wheels are respectively rotatably arranged on both sides of the toggle shaft through the rotating shaft. The rotating shaft is arranged radially along the toggle shaft, and a contact ring corresponding to the eccentric wheel is embedded in the inner wall of the driving sleeve.

5. The grinding head according to claim 4, characterized in that: The contact ring is provided with a stepped through hole, which is a first stepped hole and a second stepped hole. The first stepped hole is slidably sleeved on the shifting shaft, and the second stepped hole is slidably sleeved on the second rotating shaft.

6. The grinding head according to claim 4, characterized in that: The first linear bearing is connected to the inner wall of the driving sleeve through a bearing sleeve, and one end of the first rotating shaft close to the spline shaft is elastically abutted against the bearing sleeve through a spring sleeve.

7. The grinding head according to claim 6, characterized in that: A first plane bearing is arranged between the first rotating shaft and the spring sleeve.

8. The grinding head according to claim 2, wherein: A locking cover is slidably provided at one end of the driving sleeve close to the grinding rod, and the locking cover is rotatably sleeved on the mounting shaft through a second plane bearing.

9. The grinding head according to claim 8, characterized in that: One end of the locking cover close to the grinding rod protrudes to form a limiting boss.

10. The grinding head according to claim 1, wherein: The outer wall of the driving sleeve is connected with a sensing block, and the side wall of the mounting sleeve is provided with a sliding groove corresponding to the sensing block.

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