Pressure head device

Abstract

The pressing head device comprises a base, a pressing head and an abutting piece, the base comprises a containing cavity with an opening in the front end, the abutting piece is movably arranged in the containing cavity, and the pressing head comprises a connecting part and a pressure part which are connected with each other. The connecting part is movably arranged in the containing cavity and abuts against the abutting part, a movable gap is formed between the peripheral side of the connecting part and the inner cavity wall of the containing cavity, and the pressure part is located on the outer side of the containing cavity so as to abut against the product. Wherein the end, abutting against the connecting part, of the abutting part is arranged to be hemispherical, and when the pressure part abuts against the product, the connecting part can move along the hemispherical end face of the abutting part and drive the pressure part to rotate relative to the base, so that the pressure part rotates to be attached to the product, it is guaranteed that the pressure borne by the product is uniform and stable, and then the stability of the pressing head is improved; the product quality is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to production manufacturing equipment technical field, concretely relates to a pressure head device. BACKGROUND

[0002] In modern manufacturing industry, a certain size deviation will be generated when products are assembled, especially in the process of using a pressure head for assembly or processing. If the surface of the product being processed is not completely flat or the relative positions between the parts are deviated, the contact surface of the pressure head and the product will not be in the same plane. This situation not only affects the uniformity of the pressure applied by the pressure head, but also may cause local overpressure or underpressure phenomenon, thereby causing product quality problems such as deformation, damage or insecure assembly. In addition, long-term work in a non-ideal state will accelerate the wear of the pressure head and other related tools, increase the maintenance cost, and may affect the overall efficiency and stability of the production line. SUMMARY

[0003] Therefore, the utility model aims at providing a pressure head device which can effectively ensure that the pressure head can uniformly act on the product and improve the overall stability.

[0004] The utility model embodiment provides a pressure head device, the pressure head device includes:

[0005] The base includes a containing cavity with a front end opening;

[0006] The pressure head includes a connecting part and a pressure part connected with each other, the connecting part is movably arranged in the containing cavity, and the pressure part is located outside the containing cavity;

[0007] The abutting piece is movably arranged in the containing cavity and abuts against the connecting part, and one end of the abutting piece abutting against the connecting part is provided in a hemispherical shape;

[0008] The outer circumferential side of the connecting part and the inner cavity wall of the containing cavity are provided with a movable gap, and when the pressure part abuts against the product, the connecting part moves along the hemispherical end face of the abutting piece and drives the pressure part to rotate relative to the base.

[0009] Further, the pressure head device further includes two connecting shafts, the two sides of the base are respectively provided with rotating through holes communicated with the containing cavity, and the two connecting shafts are connected with the two sides of the connecting part from the two rotating through holes respectively, and the circumferential dimension of the connecting shaft is smaller than the circumferential dimension of the rotating through hole.

[0010] Further, the two sides of the base are respectively provided with limiting grooves communicated with the containing cavity, the limiting grooves are arranged on the side of the rotating through hole close to the front end opening and communicated with the rotating through hole, the limiting grooves gradually decrease in size from close to the rotating through hole to away from the rotating through hole, and the connecting shaft is symmetrically provided with a beveled clamping part shaped with the limiting groove.

[0011] Further, the pressing head device further comprises an elastic member, the elastic member is arranged in the accommodating cavity, the elastic member is in abutment with the end of the abutment member away from the pressing head, and the elastic member is configured to drive the abutment member and the pressing head to move forward to abut the inclined surface clamping portion with the limiting groove.

[0012] Further, the accommodating cavity comprises a first limiting cavity, a second limiting cavity and a third limiting cavity arranged in sequence from back to front, the circumferential dimension of the first limiting cavity, the circumferential dimension of the second limiting cavity and the circumferential dimension of the third limiting cavity increase in sequence, the elastic member is arranged in the first limiting cavity, the abutment member is movably arranged in the second limiting cavity, and the connecting portion is movably connected with the base by extending into the third limiting cavity.

[0013] Further, the cross-sectional shape of the connecting portion and the cross-sectional shape of the third limiting cavity are both rectangular with the same length-width ratio, and the circumferential dimension of the connecting portion is smaller than the circumferential dimension of the third limiting cavity.

[0014] Further, the pressing head device further comprises a positioning member, the top end of the base is provided with a second connecting through hole in communication with the third limiting cavity, the top end of the connecting portion is provided with a guide slot opening upward, one end of the positioning member is connected with the second connecting through hole, the other end of the positioning member extends into the guide slot, and an active gap is arranged between the bottom of the guide slot and the bottom end of the positioning member.

[0015] Further, the guide slot is arranged at the top end of the connecting portion along the symmetry axis of the base, the guide slot gradually increases in size from back to front, and the size of the rear end of the guide slot is smaller than the size of the positioning member to abut the limiting positioning member.

[0016] Further, the pressing head further comprises a buffer pad, and the buffer pad is arranged on the side of the pressure portion away from the connecting portion.

[0017] Further, the buffer pad is provided with a clamping block, the pressure portion is provided with a clamping groove, and the buffer pad and the pressure portion are connected through the clamping block and the clamping groove.

[0018] Further, the base is detachably connected with a baffle, the accommodating cavity is provided with a rear end opening, the baffle is arranged outside the rear end opening, and the elastic member is in abutment with the baffle.

[0019] Further, the base is provided with a connecting member outside, and the connecting member is provided with a fixing through hole.

[0020] Further, the abutment member comprises a turning portion and an abutment portion connected with each other, and the turning portion is arranged as a hemisphere.

[0021] Further, the circumferential dimension of the pressure portion is greater than the circumferential dimension of the front end opening.

[0022] The utility model embodiment provides a kind of head pressing device, the device includes pedestal, head and abutment piece, pedestal includes the accommodating cavity with front end opening, abutment piece is movably arranged in accommodating cavity, head includes the connecting portion and pressure portion being connected with each other.The connecting portion is movably arranged in accommodating cavity and is in abutment with abutment piece, and the outer peripheral side of connecting portion is provided with movable gap between the inner cavity wall of accommodating cavity, and pressure portion is located the outside of accommodating cavity, to facilitate abutment with product.The end of abutment piece and connecting portion is provided with hemispherical shape, when pressure portion and product are in abutment, connecting portion can be moved along the hemispherical end face of abutment piece, and drive pressure portion relative pedestal rotation, so that pressure portion is rotated to mutually adhere with product, guarantee that the pressure received by product is uniform and stable, to improve the stability of head, guarantee product quality. BRIEF DESCRIPTION OF DRAWINGS

[0023] The above and other objects, features and advantages of the utility model will become more apparent from the following description of the utility model embodiments with reference to the accompanying drawings, in which:

[0024] Figure 1 It is the overall structure schematic diagram of the head pressing device of the utility model embodiment;

[0025] Figure 2 It is the explosion schematic diagram of the head pressing device of the utility model embodiment;

[0026] Figure 3 It is the sectional view of the pedestal of the utility model embodiment;

[0027] Figure 4 It is the specific structure schematic diagram of the connecting shaft of the utility model embodiment;

[0028] Figure 5 It is the sectional view of the head pressing device of the utility model embodiment;

[0029] Figure 6 It is the sectional view when head rotates in the utility model embodiment;

[0030] Figure 7 It is the sectional view of the top end of third limiting cavity of the utility model embodiment;

[0031] Figure 8 It is the sectional view of the top end of third limiting cavity when head rotates in the utility model embodiment.

[0032] Reference signs:

[0033] 10-base; 11-housing cavity; 111-front end opening; 112-first limiting cavity; 113-second limiting cavity; 114-third limiting cavity; 115-rear end opening; 12-rotation through hole; 13-limiting groove; 14-second connecting through hole; 20-press head; 21-connection part; 22-pressure part; 221-clamping groove; 23-first connecting through hole; 24-guiding groove; 25-cushion; 251-clamping block; 30-abutment piece; 31-turning part; 32-abutment part; 40-elastic piece; 50-connection shaft; 51-rotation shaft; 511-inclined clamping part; 52-fixing shaft; 521-parallel section; 60-positioning piece; 70-baffle; 80-connection piece; 81-fixing through hole. DETAILED DESCRIPTION

[0034] The present application is described in the following based on examples, but the present application is not limited to these examples only. In the following detailed description of the present application, some specific details are described in detail. The present application can also be understood without these details by those skilled in the art. In order to avoid obscuring the essence of the present application, well-known methods, processes, procedures, elements and circuits are not described in detail.

[0035] In addition, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

[0036] Unless otherwise clearly indicated and limited, the terms "mount", "connect", "connection", "fixed", and the like, should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] Unless the context clearly requires otherwise, throughout the present application, the terms "comprise", "comprise", and the like should be interpreted as inclusive rather than exclusive or exhaustive; that is, as "including but not limited to".

[0038] In the description of the present application, it should be understood that the terms "first", "second", etc. are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In addition, in the description of the present application, unless otherwise stated, the meaning of "multiple" is two or more.

[0039] Figure 1 is the overall structure schematic diagram of the press head device of the present embodiment, Figure 2is a schematic view of an explosion structure of the pressing head device of the present embodiment. Referring to Figure 1 The pressing head device of the present embodiment comprises a base 10 and a pressing head 20. Referring to Figure 2 The base 10 comprises a receiving cavity 11 with a front end opening 111, and the pressing head 20 comprises a connecting portion 21 and a pressure portion 22. Referring to Figure 5 The opening direction of the front end opening 111 of the receiving cavity 11 is shown by the arrow in Figure 5 The connecting portion 21 extends into the receiving cavity 11 from the front end opening 111, and the pressure portion 22 is located outside the receiving cavity 11 to abut against the product. The connecting portion 21 is movably arranged in the receiving cavity 11, and a movable gap is arranged between the outer circumferential side of the connecting portion 21 and the inner cavity wall of the receiving cavity 11. Referring to Figure 2 The pressing head device further comprises an abutting member 30. The abutting member 30 is movably arranged in the receiving cavity 11, and one end of the abutting member 30 abuts against one end of the connecting portion 21. The end of the abutting member 30 abutting against the connecting portion 21 is arranged in a hemispherical shape. When the pressure portion 22 abuts against the product, the connecting portion 21 can move along the hemispherical end face of the abutting member 30 under the thrust force, while driving the pressure portion 22 to rotate relative to the base 10. The rotation of the pressing head 20 makes the abutting surface between the pressing head 20 and the product more conformable, improves the stability when abutting against the product, and at the same time guarantees the product quality.

[0040] Specifically, referring to Figure 1 and Figure 2 The pressing head device of the present embodiment further comprises two connecting shafts 50, and the pressing head 20 is connected with the base 10 through the connecting shafts 50. Referring to Figure 2 The base 10 is provided with rotating through holes 12 on both sides. The rotating through holes 12 on both sides are in communication with the receiving cavity 11, and the two connecting shafts 50 are respectively connected with the connecting portion 21 from the rotating through holes 12 on both sides. Referring to Figure 1 The connecting shaft 50 is fixedly connected with the connecting portion 21, and one end of the connecting shaft 50 is movably arranged in the rotating through hole 12 to limit the movement of the pressing head 20 within a certain range. The circumferential dimension of the connecting shaft 50 is smaller than the circumferential dimension of the rotating through hole 12, so as to ensure that a movable gap is left for the connecting shaft 50. In addition, the rotating through holes 12 on both sides are symmetrically arranged on both sides of the base 10, so as to ensure the stability when the pressing head 20 rotates. When the pressing head 20 abuts against the product, the cooperation between the connecting shaft 50 and the rotating through hole 12 can limit the connecting portion 21 to a certain extent, so that the pressing head 20 can move and rotate while ensuring that the pressing head 20 maintains a stable abutting force against the product.

[0041] Referring to Figure 4 The connecting shaft 50 comprises a rotating shaft 51 and a fixed shaft 52 connected with each other. The rotating shaft 51 and the fixed shaft 52 are both in cylindrical structure, referring to Figure 2The rotating shaft 51 is movably arranged in the rotating through hole 12. The rotating shaft 51 has the same diameter as the fixed shaft 52, facilitating assembly with the base 10 and ensuring free movement of the rotating shaft 51 in the rotating through hole 12. Referring to Figure 2 The connecting portion 21 is provided with a first connecting through hole 23, and the fixed shaft 52 extends into the first connecting through hole 23 and is connected with the connecting portion 21. In the embodiment, the first connecting through hole 23 is a waist-shaped through hole, referring to Figure 4 The fixed shaft 52 is provided with a parallel section surface 521 matched with the waist-shaped through hole. The fixed shaft 52 extends into the first connecting through hole 23 and is stably clamped with the connecting portion 21 through the parallel section surface 521, so that the connecting shaft 50 can drive the pressing head 20 to rotate synchronously when the connecting shaft 50 rotates, ensuring accurate positioning of the pressing head 20. Alternatively, the first connecting through hole 23 can also be provided in other shapes for clamping and fixing, such as a rectangular through hole, a polygonal through hole or an elliptical through hole, and correspondingly, the fixed shaft 52 is provided in a shape matched with the first connecting through hole 23 for assembly and clamping.

[0042] Referring to Figure 1 and Figure 2 The base 10 is further provided with a limiting groove 13 communicated with the accommodating cavity 11. The limiting groove 13 is arranged on one side of the rotating through hole 12 close to the front end opening 111, and the limiting groove 13 is laterally communicated with the rotating through hole 12. The rotating shaft 51 can move between the rotating through hole 12 and the limiting groove 13. The rotating shaft 51 can freely rotate in the rotating through hole 12, and the rotating shaft 51 can be limited and fixed in the limiting groove 13, thereby realizing limiting and fixing of the pressing head 20.

[0043] Referring to Figure 2 The size of the limiting groove 13 gradually decreases from close to the rotating through hole 12 to far from the rotating through hole 12, that is, referring to Figure 2 the direction indicated by the arrow, the size of the limiting groove 13 gradually decreases from back to front on the base 10. Correspondingly, referring to Figure 4 The rotating shaft 51 is symmetrically provided with a beveled clamping portion 511 shaped with the limiting groove 13, and the connecting shaft 50 can be limited and abutted in the limiting groove 13 through the beveled clamping portion 511. Referring to Figure 1 and Figure 2, the hole wall of the rotating through hole 12 is tangent to the groove wall of the limiting groove 13, so that the rotating through hole 12 and the limiting groove 13 form an integral whole. The integral rotating through hole 12 and the limiting groove 13 form a sector-like through hole structure, and the tip of the sector-like through hole faces the front end opening 111. The profiled design between the inclined surface clamping part 511 and the limiting groove 13 can ensure that the pressing head 20 is reset to the initial position from any angle. The transition connection between the rotating through hole 12 and the limiting groove 13 also effectively ensures the smooth movement of the rotating shaft 51, avoiding structural jamming. The setting of the inclined surface clamping part 511 can also achieve the positioning effect, so that the connecting shaft 50 and the pressing head 20 can be fixed and limited at the same position, thereby ensuring the accurate alignment between the subsequent pressing head 20 and the product.

[0044] Figure 6 is a sectional view when the pressing head 20 is rotated upward. Taking the case shown in Figure 6 as an example, when the pressing head 20 and the product (not shown in the figure) abut, the pressing head 20 can be rotated to fit the product under the condition that the contact surface of the pressing head 20 and the product is not in the same plane, ensuring uniform pressure distribution and product quality. Referring to Figure 6 , when the pressing head 20 is subjected to the force of the product, it first moves a certain distance backward, i.e. into the accommodating cavity 11, so that the connecting shaft 50 moves from the limiting groove 13 to the rotating through hole 12. Then the pressing head 20 rotates against the end face of the abutting piece 30 to realize fitting with the product. The limitation of the rotating through hole 12 ensures that the movement distance of the pressing head 20 remains within a certain range, so as to ensure the tightness between the pressing head 20 and the product and protect the product from being subjected to stable pressure for processing. After the product is removed, by moving the pressing head 20 forward, the connecting shaft 50 moves to the abutment between the inclined surface clamping part 511 and the limiting groove 13, which can ensure that the pressing head 20 is reset to the initial position, facilitating positioning and alignment with the next product.

[0045] Referring to Figure 2 and Figure 5 , the pressing head device of the embodiment further comprises an elastic member 40. The elastic member 40 is arranged in the accommodating cavity 11, and the elastic member 40 abuts against the end of the abutting piece 30 away from the pressing head 20. The elastic member 40 can drive the abutting piece 30 and the pressing head 20 to move forward to abut against the inclined surface clamping part 511 and the limiting groove 13, so as to reset the pressing head 20. Referring to Figure 5 , the elastic member 40 abuts against the rear end of the accommodating cavity 11, one end of the elastic member 40 is fixedly arranged, and the other end abuts against the abutting piece 30. When the pressing head 20 abuts against the product, the abutting piece 30 is driven to move backward, and the elastic member 40 is compressed at the same time. After the product is removed, the elastic member 40 pushes the abutting piece 30 and the pressing head 20 forward, and the pressing head 20 drives the connecting shaft 50 to move forward from the rotating through hole 12 into the limiting groove 13, completing the resetting of the pressing head 20.

[0046] Further, referring to Figure 3 andFigure 5 The accommodating cavity 11 is provided with a rear end opening 115, facilitating disassembly and replacement of the elastic member 40. Referring to Figure 5 The base 10 is detachably connected with a baffle 70, the baffle 70 is arranged outside the rear end opening 115, one end of the elastic member 40 abuts against the baffle 70, and the other end abuts against the abutting member 30, ensuring the stability of the overall device.

[0047] Referring to Figure 3 As Figure 3 indicated by the arrow in the figure, the accommodating cavity 11 includes a first limiting cavity 112, a second limiting cavity 113 and a third limiting cavity 114 arranged in sequence from rear to front. The circumferential dimension of the first limiting cavity 112, the circumferential dimension of the second limiting cavity 113 and the circumferential dimension of the third limiting cavity 114 increase in turn. Referring to Figure 5 The elastic member 40 is arranged in the first limiting cavity 112, and the inner cavity dimension of the first limiting cavity 112 matches the circumferential dimension of the elastic member 40. The abutting member 30 is movably arranged in the second limiting cavity 113, referring to Figure 2 The abutting member 30 includes a turning portion 31 and an abutting portion 32 connected with each other. The turning portion 31 is arranged in a hemispherical shape and abuts against the connecting portion 21. The abutting portion 32 abuts against the elastic member 40, and the inner cavity dimension of the second limiting cavity 113 matches the circumferential dimension of the abutting portion 32. Therefore, the elastic member 40 and the abutting member 30 are limited by the first limiting cavity 112 and the second limiting cavity 113, avoiding the elastic member 40 and the abutting member 30 from moving randomly, affecting the stability and accuracy of the pressure head 20 abutting against the product. Alternatively, the abutting portion 32 can be arranged in a cylindrical or cubic structure, or in a hemispherical structure matched with the second limiting cavity 113, that is, the abutting member 30 is arranged in a spherical shape as a whole.

[0048] Referring to Figure 2 The connecting portion 21 extends into the third limiting cavity 114 and is connected with the base 10. The cross-sectional shape of the connecting portion 21 and the cross-sectional shape of the third limiting cavity 114 are both rectangles with the same length-width ratio, and the circumferential dimension of the connecting portion 21 is smaller than the circumferential dimension of the third limiting cavity 114. The cross-sectional shape of the connecting portion 21 is rectangular, which is helpful for positioning the position of the connecting portion 21, and facilitates the installation of the connecting shaft 50. The shape of the connecting portion 21 and the shape of the third limiting cavity 114 match, which is convenient for forming a uniform movement gap between the connecting portion 21, ensuring that the connecting portion 21 can rotate at multiple angles. In addition, when the pressure head 20 is not moving, the center axis of the third limiting cavity 114 and the center axis of the connecting portion 21 are located on the same straight line, which is convenient for aligning the pressure head 20 with the product.

[0049] Further, referring to Figure 2 The axial dimension of the pressure portion 22 is greater than the dimension of the front end opening 111, so as to increase the contact area between the pressure head 20 and the product, ensuring the stability during abutting.

[0050] Further, referring to Figure 1 , the pressing head 20 further comprises a buffer pad 25 arranged on the side of the pressure part 22 away from the connecting part 21, so as to provide a buffering effect when abutting against the product, thereby protecting the product from damage and improving the product quality. Referring to Figure 2 , the buffer pad 25 is provided with a clamping block 251, and the pressure part 22 is provided with a clamping groove 221. The buffer pad 25 and the pressure part 22 are connected through the clamping block 251 and the clamping groove 221, so as to increase the contact area and improve the stability of the connection.

[0051] Referring to Figure 2 , the pressing head device further comprises a positioning member 60, and the top end of the base 10 is provided with a second connecting through hole 14 communicating with the third limiting cavity 114. The positioning member 60 is fixedly connected with the base 10 through the second connecting through hole 14. The top end of the connecting part 21 is provided with a guide groove 24 opening upward, one end of the positioning member 60 is connected with the second connecting through hole 14, and the other end extends into the guide groove 24. Referring to Figure 5 , an active gap is arranged between the groove bottom of the guide groove 24 and the positioning member 60. The positioning member 60 and the pressing head 20 do not contact each other in the height direction, which helps to ensure that the pressing head 20 can realize multi-angle rotation.

[0052] Referring to Figure 2 , the guide groove 24 is arranged at the top end of the connecting part 21 along the symmetry axis of the base 10. The guide groove 24 is a symmetrical structure, and the symmetry axis of the guide groove 24 coincides with the symmetry axis of the base 10. Referring to Figure 2 , the guide groove 24 gradually increases in size from the rear to the front in the direction indicated by the arrow in FIG. 9, forming a structure similar to an isosceles trapezoidal groove or a tapered groove. Figure 7 and Figure 8 are sectional views of the top end of the third limiting cavity of the embodiment. Referring to Figure 7 , when the pressing head 20 is not moved, the positioning member 60 abuts against the rear end of the guide groove 24, and the size of the rear end of the guide groove 24 is smaller than the size of the positioning member 60 to abut against and limit the positioning member 60. When the pressing head 20 moves, the relative position between the guide groove 24 and the positioning member 60 changes synchronously. Figure 8 is a sectional view when the pressing head 20 rotates, referring to Figure 8 , when the pressing head 20 abuts against the product and moves backward, the positioning member 60 is fixed, and the guide groove 24 moves synchronously. The positioning member 60 moves relative to the guide groove 24 from the rear end of the guide groove 24 to the front end of the guide groove 24, i.e., from the smaller end of the guide groove 24 to the larger end, so as to avoid collision between the pressing head 20 and the positioning member 60 when the pressing head 20 rotates. Referring to Figure 7When the pressing head 20 is reset, the positioning member 60 moves to the rear end of the guide groove 24 relative to the guide groove 24, thereby realizing the reset of the pressing head 20 in the horizontal direction, and the symmetrical arrangement of the guide groove 24 can ensure that the central axis of the connecting portion 21 is aligned with the central axis of the third limiting cavity 114.

[0053] Further, with reference to Figures 1 to 3 The pressing head device further comprises a connecting member 80, and the connecting member 80 is provided with a fixing hole 81, and the pressing head device is fixedly connected with other related equipment through the connecting member 80.

[0054] The pressing head device can rotate relative to the hemispherical end face when the pressing head is abutted with the hemispherical abutting member, so that the abutting surface between the pressing head and the product is completely fitted, thereby ensuring that the pressure on the product is uniform and stable, and the product quality is ensured. In addition, the other side of the abutting member is further provided with an elastic member, that is, the abutting member and the pressing head can be tightly abutted, and the automatic reset of the pressing head can be realized, the working efficiency is improved, the pressing head is further connected with a rotating shaft and a positioning member to realize the reset to the same position each time, and the accurate positioning with the product is ensured.

[0055] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A head pressing device characterized by, The pressure head device comprises: a base (10) comprising a containing cavity (11) with a front end opening (111); a pressure head (20) comprising a connecting part (21) and a pressure part (22) connected with each other, the connecting part (21) being movably arranged in the containing cavity (11), and the pressure part (22) being located outside the containing cavity (11); an abutting part (30) movably arranged in the containing cavity (11) and abutting against the connecting part (21), one end of the abutting part (30) abutting against the connecting part (21) being arranged in a hemispherical shape; wherein a movable gap is arranged between the outer circumferential side of the connecting part (21) and the inner cavity wall of the containing cavity (11), when the pressure part (22) abuts against the product, the connecting part (21) moves along the hemispherical end face of the abutting part (30) and drives the pressure part (22) to rotate relative to the base (10).

2. The ram apparatus of claim 1, wherein, The pressure head device further comprises two connecting shafts (50), both sides of the base (10) are respectively provided with a rotating through hole (12) communicating with the containing cavity (11), and the two connecting shafts (50) are respectively connected with both sides of the connecting part (21) from the two rotating through holes (12), and the circumferential dimension of the connecting shaft (50) is smaller than that of the rotating through hole (12).

3. The indenter device of claim 2, wherein, Both sides of the base (10) are respectively provided with a limiting groove (13) communicating with the containing cavity (11), the limiting groove (13) is arranged on one side of the rotating through hole (12) close to the front end opening (111) and communicates with the rotating through hole (12), the dimension of the limiting groove (13) gradually decreases from close to the rotating through hole (12) to away from the rotating through hole (12), and the connecting shaft (50) is symmetrically provided with a beveled clamping part (511) shaped with the limiting groove (13).

4. The indenter device of claim 3, wherein, The pressure head device further comprises an elastic part (40), the elastic part (40) is arranged in the containing cavity (11), one end of the elastic part (40) abutting against the abutting part (30) away from the pressure head (20), and the elastic part (40) is configured to drive the abutting part (30) and the pressure head (20) to move forward to abut against the beveled clamping part (511) and the limiting groove (13).

5. The indenter device of claim 4, wherein, The containing cavity (11) comprises a first limiting cavity (112), a second limiting cavity (113) and a third limiting cavity (114) arranged in sequence from back to front, the circumferential dimension of the first limiting cavity (112), the circumferential dimension of the second limiting cavity (113) and the circumferential dimension of the third limiting cavity (114) increase in sequence, the elastic part (40) is arranged in the first limiting cavity (112), the abutting part (30) is movably arranged in the second limiting cavity (113), and the connecting part (21) extends into the third limiting cavity (114) and is movably connected with the base (10).

6. The indenter device of claim 5, wherein, The cross-sectional shape of the connecting part (21) and the cross-sectional shape of the third limiting cavity (114) are both rectangles with the same length-width ratio, and the circumferential dimension of the connecting part (21) is smaller than the circumferential dimension of the third limiting cavity (114).

7. The indenter device of claim 5, wherein, The pressure head device further comprises a positioning member (60), the top end of the base (10) is provided with a second connecting through hole (14) in communication with the third limiting cavity (114), the top end of the connecting part (21) is provided with a guide groove (24) opening upward, one end of the positioning member (60) is connected with the second connecting through hole (14), the other end of the positioning member (60) extends into the guide groove (24), and an active gap is arranged between the groove bottom of the guide groove (24) and the bottom end of the positioning member (60).

8. The indenter device of claim 7, wherein, The guide groove (24) is arranged at the top end of the connecting part (21) along the symmetry axis of the base (10), the size of the guide groove (24) gradually increases from the rear to the front, and the size of the rear end of the guide groove (24) is smaller than the size of the positioning member (60) to abut and limit the positioning member (60).

9. The indenter device of claim 1, wherein, The pressure head (20) further comprises a buffer pad (25), and the buffer pad (25) is arranged on the side of the pressure part (22) away from the connecting part (21).

10. The indenter device of claim 9, wherein, The buffer pad (25) is provided with a clamping block (251), the pressure part (22) is provided with a clamping groove (221), and the buffer pad (25) and the pressure part (22) are connected through the clamping block (251) and the clamping groove (221).

11. The indenter device of claim 4, wherein, The base (10) is detachably connected with a baffle (70), the containing cavity (11) is provided with a rear end opening (115), the baffle (70) is arranged outside the rear end opening (115), and the elastic member (40) abuts against the baffle (70).

12. The indenter device of claim 1, wherein, The base (10) is provided with a connecting member (80) outside, and the connecting member (80) is provided with a fixing through hole (81).

13. The indenter device of claim 1, wherein, The abutting member (30) comprises a turning part (31) and an abutting part (32) connected with each other, and the turning part (31) is arranged as a hemisphere.

14. The indenter device of claim 2, wherein, The circumferential dimension of the pressure part (22) is greater than the circumferential dimension of the front end opening (111).

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