Hydraulic pull-down tensioning device special for heavy steering gear shell

Abstract

The utility model relates to a special hydraulic pull-down tensioning device for a heavy steering gear shell, which comprises a cylinder body, a piston head, a piston pull rod, a sealing cover, an expansion sleeve, an anti-rotating ring, an ejector rod, an ejector plate, a cover plate, a mandrel and a positioning ring, the mandrel is designed in the middle of the upper end of the cylinder body, a piston groove is designed in the middle of the cylinder body, a middle hole is formed in the middle of the mandrel, and the lower end of the middle hole is communicated with the piston groove. The upper end of the middle hole communicates with the upper end face of the mandrel. The mandrel is arranged to be a conical shaft with the upper portion narrow and the lower portion wide, the inner side faces of the expansion sleeves also form conical inner side faces with the upper portion narrow and the lower portion wide, and the inner side faces of the expansion sleeves are matched with the peripheral face of the mandrel in a mutually tangent mode. The device has the advantages that the design is ingenious, the structure is reasonable and compact, the expansion sleeve is inserted into the transverse flow channel of the heavy steering gear shell, the piston head drives the piston pull rod to pull the cover plate downwards, the cover plate presses the expansion sleeve downwards, and under the mutual beveling effect of the inclined face of the expansion sleeve and the peripheral face of the mandrel, the expansion sleeve is ejected outwards and expanded; in this way, the outer side of the expansion sleeve abuts against the inner side wall of the transverse flow channel of the heavy steering gear shell, the heavy steering gear shell can be conveniently and rapidly clamped, and the machining requirement is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to heavy steering gear housing processing field, concretely relates to a hydraulic down pull tension device special for heavy steering gear housing. BACKGROUND

[0002] Heavy steering gear housing as important part of steering system, its design, material selection, manufacturing process and quality control all need to meet the high standard requirement. Whether using high strength cast iron or aluminum alloy, its final purpose is to ensure the stability and durability of steering system, satisfies the use demand of heavy vehicle under various working conditions. The manufacture of heavy steering gear housing usually adopts casting process, pours liquid metal into shape through precise mould. Then cooling, cleaning and machining are carried out, ensure that the housing has accurate size and good surface finish. Because the machining industry in recent years to heavy steering gear housing machining precision and efficiency requirement is higher and higher, along with the labor cost unceasingly improves, traditional positioning and clamping mode labor intensity is big, the efficiency of loading and unloading parts, clamping force cannot satisfy the positioning demand. SUMMARY

[0003] In order to solve the above technical problem, the utility model provides a hydraulic down pull tension device special for heavy steering gear housing, clever design, compact structure, it is convenient to dress and clamping heavy steering gear housing, satisfies the processing demand.

[0004] The technical scheme of the utility model:

[0005] The hydraulic down-pulling tension device special for heavy steering gear housing, the heavy steering gear housing comprises vertical flow channel and horizontal flow channel, the upper and lower ends of the vertical flow channel are communicated with the upper and lower end faces respectively, one end of the horizontal flow channel is communicated with the corresponding end face, and the horizontal flow channel is communicated with the vertical flow channel near the middle position; it comprises a cylinder body, a piston head, a piston pull rod, a cover, a sleeve, an anti-rotation ring, a top rod, an ejection plate, a cover plate, a mandrel and a positioning ring, the upper end of the cylinder body is designed with the mandrel, the middle of the cylinder body is designed with a piston groove, the middle of the mandrel is designed with a middle hole, the lower end of the middle hole is communicated with the piston groove, and the upper end of the middle hole is communicated with the upper end face of the mandrel; the piston head is slidingly and sealingly arranged in the piston groove, the lower end of the piston groove of the cylinder body is designed with a large circular groove outside, the cover is arranged at the bottom of the large circular groove, the upper end of the piston pull rod is arranged on the piston head, and the upper end of the piston pull rod is slidingly and sealingly arranged in the central hole of the mandrel and connected with the middle of the lower end of the cover plate; the lower end of the piston head is also provided with a lower piston rod, the lower end of the lower piston rod is slidingly and sealingly arranged through the cover, and the lower end of the lower piston rod is connected with the middle of the upper end of the ejection plate; the ejection plate is arranged in the large circular groove and below the cover, the anti-rotation ring is arranged on the outside of the mandrel, a plurality of top rods are arranged between the lower end of the anti-rotation ring and the ejection plate, the upper end of the top rod is arranged on the lower end of the anti-rotation ring, the lower end of the top rod is arranged through the cylinder body and then through the lower cover plate and then on the upper end of the ejection plate; a plurality of sleeves are arranged around the mandrel, a support is arranged between adjacent sleeves, and the support is arranged in an inverted L shape; the upper end of the sleeve is clamped on the inner side of the lower end of the cover plate, the lower end of the sleeve is arranged on the upper end of the anti-rotation ring, the upper end of the support is also clamped on the inner side of the lower end of the cover plate, the positioning ring is arranged on the outside of the anti-rotation ring and fixed on the upper end of the cylinder body, the inner side of the positioning ring is provided with a ring groove, the ring groove is arranged on the outside of the upper end of the anti-rotation ring, the lower end of the support is arranged in the ring groove, and the lower end face of the support and the bottom of the ring groove are provided with a certain movement gap; the mandrel is arranged in a conical shape with a narrow upper end and a wide lower end, the inner side of the sleeve is also arranged in a conical shape with a narrow upper end and a wide lower end, and the inner side of the sleeve and the outer periphery of the mandrel are matched.

[0006] The mandrel and the cylinder body are integrally machined.

[0007] The middle of the lower end of the cover plate is designed with a lower connecting rod, the lower end of the lower connecting rod is also designed with a lead screw, the middle of the upper end of the piston pull rod is designed with an upper threaded hole, the lower connecting rod is rotatably connected in the upper threaded hole through the lead screw, the middle of the lower end of the lower piston rod is designed with a lower threaded hole, the upper end of the ejection plate is provided with an upper connecting lead screw, and the upper connecting lead screw is rotatably connected in the lower threaded hole.

[0008] The support is arranged in a metal support, the inner side of the upper end of the support is also designed as a slope matched with the outer periphery of the mandrel, the inner side of the upper end of the support is provided with an arc-shaped protrusion, the lower end of the cover plate is designed with an annular groove near the middle, and the arc-shaped protrusion is clamped in the annular groove; the upper end of the sleeve is designed with an arc-shaped protrusion, and the upper end of the sleeve is clamped in the annular groove through the arc-shaped protrusion.

[0009] The upper end of the piston groove is designed with an upper oil inlet and outlet channel, the upper oil inlet and outlet channel passes through the wall of the cylinder body, one end of the upper oil inlet and outlet channel is communicated with the upper end of the piston groove, and the other end of the upper oil inlet and outlet channel is communicated with the lower end face of the cylinder body; the lower end of the piston groove is also designed with a lower oil inlet and outlet channel, the lower oil inlet and outlet channel is communicated with the lower end of the piston groove from the upper end of the cover, the lower oil inlet and outlet channel passes through the cover and then the wall of the cylinder body, and finally the lower oil inlet and outlet channel is communicated with the lower end face of the cylinder body.

[0010] The anti-rotation ring sleeve is designed as a cylindrical shape at the root position of the mandrel.

[0011] The lower end of the cylinder body is sealingly installed on the hydraulic workbench of the machine tool machining center, and the inlets of the upper oil inlet and outlet channel and the lower oil inlet and outlet channel arranged on the upper end of the cylinder body are communicated with the hydraulic oil inlet and outlet channels on the upper end of the hydraulic workbench.

[0012] The upper end of the anti-rotation ring is uniformly designed with a plurality of separation grooves, the separation grooves are designed with arc-shaped blocks, the lower end of the expansion sleeve is also designed with arc-shaped protrusions, the lower end of the expansion sleeve is located in the corresponding separation groove and the lower end of the expansion sleeve is clamped on the inner side of the arc-shaped block through the arc-shaped protrusions, the separation blocks are formed between the adjacent separation grooves, the lower end of the supporting piece is movably located between the ring grooves of the positioning ring and the outside of the separation blocks, and the lower end of the anti-rotation ring is also designed with corresponding grooves corresponding to the jacks.

[0013] The utility model discloses the advantages are that the design is ingenious, and the structure is reasonable and compact, through the expansion sleeve insertion heavy steering gear casing's horizontal flow channel, through the piston head with the piston pull rod lower pull cover plate, and the cover plate presses down the expansion sleeve, and the inclined surface of the expansion sleeve and the outer circumferential surface of the mandrel are mutually inclined and cut under the action, and the expansion sleeve is extruded outward and expands, so that the outside of the expansion sleeve is extruded on the inner side wall of the horizontal flow channel of the heavy steering gear casing, and the heavy steering gear casing is conveniently and quickly clamped, and the machining demand is satisfied. ACCURACY OF DRAWINGS

[0014] Figure 1 It is the three-dimensional schematic diagram of the utility model.

[0015] Figure 2 It is the vertical sectional view of the utility model.

[0016] Figure 3 It is the vertical sectional view of the lower oil inlet and outlet channel of the cylinder body and the local expansion sleeve omission schematic diagram.

[0017] Figure 4 It is the vertical sectional view of the upper oil inlet and outlet channel of the cylinder body.

[0018] Figure 5 is a schematic diagram of the anti-rotation ring of the utility model.

[0019] Figure 6 is a schematic diagram of the expansion sleeve of the utility model.

[0020] Figure 7 is a schematic diagram of the support of the utility model.

[0021] Figure 8 is a schematic diagram of the clamping state of the heavy-duty steering gear shell of the utility model.

[0022] Figure 9 is a schematic diagram of the heavy-duty steering gear shell of the utility model. DETAILED DESCRIPTION

[0023] Refer to the drawings Figures 1-9The utility model provides a heavy steering gear housing special hydraulic down-pull tension device, and the heavy steering gear housing includes vertical flow channel 101 and horizontal flow channel 102, the upper and lower ends of vertical flow channel 101 are communicated with the upper and lower two end faces respectively, one end of horizontal flow channel 102 is communicated with the corresponding end face, and horizontal flow channel 102 is communicated with vertical flow channel 101 near the middle position, it includes cylinder body 1, piston head 2, piston pull rod 3, cover 4, expansion sleeve 5, anti-rotation ring 6, ejector rod 7, ejector plate 8, cover plate 9, mandrel 10 and positioning ring 11, the upper end of cylinder body 1 is designed with mandrel 10, and the middle of cylinder body 1 is designed with piston groove 12, the middle of mandrel 10 is opened with middle hole, the lower end of middle hole is communicated with piston groove 12, and the upper end of middle hole is communicated with the upper end face of mandrel 10, piston head 2 is slidably sealedly installed in piston groove 12, and the outer side of the lower end port part of the piston groove 12 of cylinder body 1 is also designed with large circular groove 13, cover 4 is installed at the bottom of large circular groove 13, piston pull rod 3 is installed at the upper end of piston head 2, the upper end of piston pull rod 3 is slidably sealed in the central hole of mandrel 10 and is connected with the lower end middle of cover plate 9, the lower end of piston head 2 is also provided with lower piston rod, the lower end of lower piston rod is slidably sealed through cover 4 and is connected with the upper end middle of ejector plate 8, ejector plate 8 is located in large circular groove 13 and is located below cover 4, anti-rotation ring 6 is sleeved on the root of the outer side of mandrel 10, a plurality of ejector rods 7 are installed between the lower end of anti-rotation ring 6 and ejector plate 8, the upper end of ejector rod 7 is on the lower end of anti-rotation ring 6, and the lower end of ejector rod 7 is on the upper end of ejector plate 8 after penetrating through cylinder body 1 and then penetrating through lower cover plate, a plurality of expansion sleeves 5 are installed around mandrel 10, support pieces 15 are installed between adjacent expansion sleeves 5, and the support pieces 15 are set as inverted L-shaped pieces, the upper end of expansion sleeve 5 is clamped in the inner side of the lower end of cover plate 9, the lower end of expansion sleeve 5 is on the upper end of anti-rotation ring 6, the upper end of support piece 15 is also clamped in the inner side of the lower end of cover plate 9, positioning ring 11 is sleeved on the outer side of anti-rotation ring 6 and is fixed on the upper end of cylinder body 1, ring groove 14 is formed on the inner side upper end of positioning ring 11, ring groove 14 is located on the outer side of the upper end of anti-rotation ring 6, the lower end of support piece 15 is located in ring groove 14, and a certain movement gap is left between the lower end face of support piece 15 and the bottom of ring groove 14, the mandrel 10 is set as a conical shaft with the upper narrow and the lower wide, the inner side of the plurality of expansion sleeves 5 also forms the conical inner side with the upper narrow and the lower wide, and the inner side of expansion sleeve 5 and the outer periphery of mandrel 10 are mutually cut and matched.

[0024] The mandrel 10 and cylinder body 1 are integrally processed and formed, compact structure reduces production cost.

[0025] The lower end of the cover plate 9 is designed with a lower connecting rod, and the lower end of the lower connecting rod is designed with a screw rod. The upper end of the piston rod 3 is designed with an upper threaded hole. The lower connecting rod is rotatably connected in the upper threaded hole through the screw rod. The lower end of the lower piston rod is designed with a lower threaded hole. The upper end of the ejector plate 8 is designed with an upper connecting screw rod, which is rotatably connected in the lower threaded hole.

[0026] The support 15 is a metal support 15. The inner side of the upper end of the support 15 is also designed as a slope matched with the outer circumferential surface of the mandrel 10. The inner side of the upper end of the support 15 is provided with an arc-shaped protrusion. The lower end of the cover plate 9 is designed with an annular groove. The arc-shaped protrusion is clamped in the annular groove. The upper end of the expansion sleeve 5 is designed with an arc-shaped protrusion. The upper end of the expansion sleeve 5 is also clamped in the annular groove through the arc-shaped protrusion. The expansion sleeve is made of elastic rubber. The support can be a steel metal piece. The support is designed as an inverted L-shaped piece. The inner side of the lower end of the support avoids the conical outer circumferential surface of the mandrel and does not interfere. There is a certain movement gap between the inner side of the support and the conical outer circumferential surface of the mandrel. Thus, the support can move up and down smoothly.

[0027] The upper end of the piston groove 12 is designed with an upper oil inlet and outlet channel 121. The upper oil inlet and outlet channel 121 passes through the wall of the cylinder body 1. One end of the upper oil inlet and outlet channel 121 is connected with the upper end of the piston groove 12. The other end of the upper oil inlet and outlet channel 121 is connected with the lower end surface of the cylinder body 1. The lower end of the piston groove 12 is also designed with a lower oil inlet and outlet channel 122. The lower oil inlet and outlet channel 122 is connected with the lower end of the piston groove 12 from the upper end of the cover 4. The lower oil inlet and outlet channel 122 passes through the cover 4 and then the wall of the cylinder body 1. Finally, the lower oil inlet and outlet channel 122 is connected with the lower end surface of the cylinder body 1. The upper and lower oil inlet and outlet channels are designed in the inner wall of the cylinder body and the cover. This design prevents the hydraulic pipeline from running from the outside, reduces the leakage problem, and reduces the interference problem caused by the exposure of the hydraulic pipeline to the outside. During the machining process of the upper and lower oil inlet and outlet channels, process holes are formed which are connected with the outer side of the cylinder body. During use, all the process holes are plugged by plugs. Similarly, the channels on the cover also involve process holes.

[0028] The anti-rotation ring 6 is set as a cylindrical mandrel 10 at the root position of the mandrel 10. This design facilitates the up-and-down movement of the anti-rotation ring on the outer side of the mandrel.

[0029] The lower end of the cylinder body 1 is sealingly installed on the hydraulic workbench 100 of the machine tool machining center. The inlets of the upper oil inlet and outlet channel and the lower oil inlet and outlet channel provided on the upper surface of the cylinder body 1 are respectively connected with the hydraulic oil inlet and outlet channels on the upper surface of the hydraulic workbench 100. The hydraulic workbench mainly blocks the lower end of the cylinder body and provides hydraulic power.

[0030] The anti-rotation ring 6 is uniformly provided with a plurality of separation grooves 61 at the upper end, the separation grooves 61 are provided with arc-shaped blocks 62, the lower end of the expansion sleeve is also provided with arc-shaped blocks, the lower end of the expansion sleeve is located in the corresponding separation groove 61 and the lower end of the expansion sleeve is clamped in the inner side of the arc-shaped block 62 through the arc-shaped block; the separation blocks 63 are formed between adjacent separation grooves, the lower end of the supporting piece is movably located outside the separation blocks and between the ring grooves of the positioning ring; the anti-rotation ring 6 is also provided with corresponding grooves 64 corresponding to the jacks; the separation grooves and the arc-shaped blocks are designed to ensure that the expansion sleeve cannot fall off and can also ensure that the expansion sleeve can be expanded for operation; the separation blocks prevent the supporting piece from falling off during the micro-motion process and can ensure that the lower end of the supporting piece is blocked outside during the downward process, which is safe and reliable. The anti-rotation ring is also provided with corresponding grooves corresponding to the jacks at the lower end, which ensures that the upper end of the jack is accurately positioned and prevents the anti-rotation ring from rotating.

[0031] When the utility model is used, the expansion sleeve is initially in a contracted state, the transverse flow channel of the heavy steering gear shell can be smoothly sleeved from the outside of the expansion sleeve, the expansion sleeve is inserted into the transverse flow channel of the heavy steering gear shell, the upper end of the piston groove starts to supply oil through the oil inlet and outlet flow channel, the piston head is driven to move downward, the cover plate is pulled downward by the piston head and the piston pull rod, the cover plate presses a plurality of expansion sleeves downward, under the mutual oblique cutting action of the inclined surface of the plurality of expansion sleeves and the outer circumferential surface of the mandrel, the plurality of expansion sleeves are pushed outward and expanded, so that the outside of the plurality of expansion sleeves is pushed against the inner side wall of the transverse flow channel of the heavy steering gear shell and is expanded tightly, the heavy steering gear shell is conveniently and quickly clamped, and the machining requirement is met; the utility model also designs a loosening structure, the lower end of the piston groove supplies oil through the oil inlet and outlet flow channel, the upper end of the piston groove returns oil through the oil inlet and outlet flow channel, the piston head and the piston pull rod move upward and push out the cover plate, the lower end of the piston head and the top-out plate move upward, the top-out plate acts on the anti-rotation ring, the anti-rotation ring pushes up the expansion sleeve, the expansion sleeve moves upward and is elastically contracted, and the expansion sleeve cannot be loosened.

Claims

1. A hydraulic down-draw tensioner dedicated to heavy-duty steering gear housings, the heavy-duty steering gear housings comprising vertical flow channels and horizontal flow channels, the vertical flow channels having upper and lower ends respectively communicating with upper and lower end faces, the horizontal flow channels having one end communicating with the corresponding end face, and the horizontal flow channels communicating with the vertical flow channels at a position close to the middle; characterized in that, It includes cylinder, piston head, piston pull rod, cover, expansion sleeve, anti-rotation ring, ejector rod, ejector plate, cover plate, mandrel and positioning ring, the middle of the upper end of the cylinder is designed with a mandrel, the middle of the cylinder is designed with a piston slot, the middle of the mandrel is designed with a middle hole, the lower end of the middle hole is communicated with the piston slot, and the upper end of the middle hole is communicated with the upper end surface of the mandrel; the piston head is slidably sealed and installed in the piston slot, the lower end of the piston slot of the cylinder is designed with a large circular groove outside, the cover is installed at the bottom of the large circular groove, the upper end of the piston pull rod is installed on the piston head, and the upper end of the piston pull rod is slidably sealed in the central hole of the mandrel and connected with the middle of the lower end of the cover plate; the lower end of the piston head is also provided with a lower piston rod, the lower end of the lower piston rod is slidably sealed and penetrates the cover, and the lower end of the lower piston rod is connected with the middle of the upper end of the ejector plate, the ejector plate is located in the large circular groove and below the cover, the anti-rotation ring is sleeved on the outside of the mandrel, a plurality of ejector rods are installed between the lower end of the anti-rotation ring and the ejector plate, the upper end of the ejector rod is supported on the lower end of the anti-rotation ring, and the lower end of the ejector rod penetrates the cylinder and then penetrates the lower cover and is supported on the upper end of the ejector plate; a plurality of expansion sleeves are installed around the mandrel, support pieces are installed between adjacent expansion sleeves, and the support pieces are designed as inverted L-shaped pieces; the upper end of the expansion sleeve is clamped on the inner side of the lower end of the cover plate, the lower end of the expansion sleeve is supported on the upper end of the anti-rotation ring, the upper end of the support piece is also clamped on the inner side of the lower end of the cover plate, the positioning ring is sleeved on the outside of the anti-rotation ring and fixed on the upper end of the cylinder, the inner side of the positioning ring is provided with a ring groove, the ring groove is located on the outside of the upper end of the anti-rotation ring, the lower end of the support piece is located in the ring groove, and the lower end surface of the support piece and the bottom of the ring groove are left with a certain movement gap; the mandrel is designed as a conical shaft with a narrow upper end and a wide lower end, the inner side of the expansion sleeve is also designed as a conical inner side with a narrow upper end and a wide lower end, and the inner side of the expansion sleeve and the outer periphery of the mandrel are mutually matched.

2. A hydraulic down-draw tensioner for heavy steering gear housings as claimed in claim 1, wherein, The mandrel and the cylinder are integrally machined and formed.

3. A hydraulic down-draw tensioner for heavy steering gear housings as claimed in claim 1, wherein, The middle of the lower end of the cover plate is designed with a lower connecting rod, the lower end of the lower connecting rod is also designed with a lead screw, the middle of the upper end of the piston pull rod is designed with an upper threaded hole, and the lower connecting rod is rotatably connected in the upper threaded hole through the lead screw; the middle of the lower end of the lower piston rod is designed with a lower threaded hole, the upper end of the ejector plate is provided with an upper connecting lead screw, and the upper connecting lead screw is rotatably connected in the lower threaded hole.

4. A hydraulic down-draw tensioner for heavy steering gear housings as claimed in claim 1, wherein, The support piece is designed as a metal support piece, the inner side of the upper end of the support piece is also designed as an inclined surface matched with the outer periphery of the mandrel, the inner side of the upper end of the support piece is provided with an arc-shaped lug, the lower end of the cover plate is designed with an annular groove near the middle, and the arc-shaped lug is clamped in the annular groove; the upper end of the expansion sleeve is designed with an arc-shaped lug, and the upper end of the expansion sleeve is clamped in the annular groove through the arc-shaped lug.

5. A hydraulic down-draw tensioner for heavy steering gear housings as claimed in claim 1, wherein, The upper end of the piston slot is designed with an upper oil inlet and outlet channel, the upper oil inlet and outlet channel passes through the wall of the cylinder, one end of the upper oil inlet and outlet channel is communicated with the upper end of the piston slot, and the other end of the upper oil inlet and outlet channel is communicated with the lower end surface of the cylinder; the lower end of the piston slot is also designed with a lower oil inlet and outlet channel, the lower oil inlet and outlet channel is communicated with the lower end of the piston slot from the upper end of the cover, the lower oil inlet and outlet channel passes through the cover and then the wall of the cylinder, and finally the lower oil inlet and outlet channel is communicated with the lower end surface of the cylinder.

6. A hydraulic down-draw tensioner for heavy steering gear housings as claimed in claim 1, wherein, The anti-rotation ring is sleeved on the root position of the mandrel and is designed as a cylindrical mandrel.

7. A hydraulic down-draw tensioner for heavy steering gear housings as claimed in claim 5, wherein, The lower end of the cylinder is sealingly installed on the hydraulic table of the machine tool machining center, and the upper inlet of the upper oil inlet and outlet flow channel and the lower inlet of the lower oil inlet and outlet flow channel arranged on the upper end of the cylinder are communicated with the hydraulic oil inlet and outlet flow channel on the upper end of the hydraulic table.

8. A hydraulic down-draw tensioner for heavy steering gear housings as claimed in claim 1, wherein, The upper end of the anti-rotation ring is uniformly provided with a plurality of separation grooves, and the separation grooves are provided with arc-shaped blocks, the lower end of the expansion sleeve is also provided with arc-shaped protrusions, the lower end of the expansion sleeve is located in the corresponding separation groove, and the lower end of the expansion sleeve is clamped in the inner side of the arc-shaped block through the arc-shaped protrusions; the separation blocks are formed between adjacent separation grooves, the lower end of the supporting piece is movably located between the separation blocks and the ring groove of the positioning ring, and the lower end of the anti-rotation ring is also provided with corresponding grooves corresponding to the jacks.

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